# Build error when trying to compile wasm target

**URL:** <https://internals.rust-lang.org/t/build-error-when-trying-to-compile-wasm-target/21192>\
**Category:** Uncategorized\
**Created:** [July 17, 2024, 2:01pm UTC](https://internals.rust-lang.org/t/build-error-when-trying-to-compile-wasm-target/21192 "2024-07-17T14:01:39Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**Author:** ![pprkut](https://sea2.discourse-cdn.com/flex002/user_avatar/internals.rust-lang.org/pprkut/32/12345_2.png) [@pprkut](https://internals.rust-lang.org/u/pprkut)\
**Post date:** [July 17, 2024, 2:01pm UTC](https://internals.rust-lang.org/t/build-error-when-trying-to-compile-wasm-target/21192/1 "2024-07-17T14:01:39Z")

</div>

I'm trying to build the `wasm32-unknown-unknown` target for rust (with `x86_64-unknown-linux-gnu` as host system), but I keep hitting the same build error. I've exhausted all options I could think of, so I'm hoping someone here can point out where my problem might lie.

The rust package for my distro doesn't ship the wasm targets by default, so I'm creating a separate addon package for it. I have a script to do so and that worked fine up to (including) rust 1.77.2. With rust 1.78.0 _something_ changed, either in rust or in my base system (Slackware64-current) and I just can't narrow down what.

This is the error I'm getting:

```rust
Building stage1 library artifacts (x86_64-unknown-linux-gnu -> wasm32-unknown-unknown)
   Compiling compiler_builtins v0.1.109
   Compiling core v0.0.0 (/usr/src/sbo_tmp/rustc-1.79.0-src/library/core)
The following warnings were emitted during compilation:

warning: compiler_builtins@0.1.109: error: unable to create target: 'No available targets are compatible with triple "wasm32-unknown-unknown"'
warning: compiler_builtins@0.1.109: 1 error generated.

error: failed to run custom build command for `compiler_builtins v0.1.109`

Caused by:
  process didn't exit successfully: `/usr/src/sbo_tmp/rustc-1.79.0-src/build/x86_64-unknown-linux-gnu/stage1-std/release/build/compiler_builtins-fdd5d9d18b5f05dc/build-script-build` (exit status: 1)
  --- stdout
  cargo:rerun-if-changed=build.rs
  cargo:compiler-rt=/usr/src/sbo_tmp/rustc-1.79.0-src/vendor/compiler_builtins-0.1.109/compiler-rt
  cargo:rustc-cfg=feature="unstable"
  cargo:rustc-cfg=feature="mem"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/absvdi2.c
  cargo:rustc-cfg=__absvdi2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/absvsi2.c
  cargo:rustc-cfg=__absvsi2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/absvti2.c
  cargo:rustc-cfg=__absvti2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/addvdi3.c
  cargo:rustc-cfg=__addvdi3="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/addvsi3.c
  cargo:rustc-cfg=__addvsi3="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/addvti3.c
  cargo:rustc-cfg=__addvti3="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/clzdi2.c
  cargo:rustc-cfg=__clzdi2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/clzsi2.c
  cargo:rustc-cfg=__clzsi2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/clzti2.c
  cargo:rustc-cfg=__clzti2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/cmpdi2.c
  cargo:rustc-cfg=__cmpdi2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/cmpti2.c
  cargo:rustc-cfg=__cmpti2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/ctzdi2.c
  cargo:rustc-cfg=__ctzdi2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/ctzsi2.c
  cargo:rustc-cfg=__ctzsi2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/ctzti2.c
  cargo:rustc-cfg=__ctzti2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/divdc3.c
  cargo:rustc-cfg=__divdc3="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/divsc3.c
  cargo:rustc-cfg=__divsc3="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/extendhfsf2.c
  cargo:rustc-cfg=__extendhfsf2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/ffsti2.c
  cargo:rustc-cfg=__ffsti2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/int_util.c
  cargo:rustc-cfg=__int_util="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/muldc3.c
  cargo:rustc-cfg=__muldc3="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/mulsc3.c
  cargo:rustc-cfg=__mulsc3="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/mulvdi3.c
  cargo:rustc-cfg=__mulvdi3="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/mulvsi3.c
  cargo:rustc-cfg=__mulvsi3="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/mulvti3.c
  cargo:rustc-cfg=__mulvti3="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/negdf2.c
  cargo:rustc-cfg=__negdf2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/negdi2.c
  cargo:rustc-cfg=__negdi2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/negsf2.c
  cargo:rustc-cfg=__negsf2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/negti2.c
  cargo:rustc-cfg=__negti2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/negvdi2.c
  cargo:rustc-cfg=__negvdi2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/negvsi2.c
  cargo:rustc-cfg=__negvsi2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/negvti2.c
  cargo:rustc-cfg=__negvti2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/paritydi2.c
  cargo:rustc-cfg=__paritydi2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/paritysi2.c
  cargo:rustc-cfg=__paritysi2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/parityti2.c
  cargo:rustc-cfg=__parityti2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/popcountdi2.c
  cargo:rustc-cfg=__popcountdi2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/popcountsi2.c
  cargo:rustc-cfg=__popcountsi2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/popcountti2.c
  cargo:rustc-cfg=__popcountti2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/subvdi3.c
  cargo:rustc-cfg=__subvdi3="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/subvsi3.c
  cargo:rustc-cfg=__subvsi3="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/subvti3.c
  cargo:rustc-cfg=__subvti3="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/truncdfhf2.c
  cargo:rustc-cfg=__truncdfhf2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/truncsfhf2.c
  cargo:rustc-cfg=__truncsfhf2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/ucmpdi2.c
  cargo:rustc-cfg=__ucmpdi2="optimized-c"
  cargo:rerun-if-changed=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/ucmpti2.c
  cargo:rustc-cfg=__ucmpti2="optimized-c"
  TARGET = Some("wasm32-unknown-unknown")
  OPT_LEVEL = Some("3")
  HOST = Some("x86_64-unknown-linux-gnu")
  cargo:rerun-if-env-changed=CC_wasm32-unknown-unknown
  CC_wasm32-unknown-unknown = None
  cargo:rerun-if-env-changed=CC_wasm32_unknown_unknown
  CC_wasm32_unknown_unknown = Some("clang")
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  DEBUG = Some("false")
  cargo:rerun-if-env-changed=CFLAGS_wasm32-unknown-unknown
  CFLAGS_wasm32-unknown-unknown = None
  cargo:rerun-if-env-changed=CFLAGS_wasm32_unknown_unknown
  CFLAGS_wasm32_unknown_unknown = Some("-ffunction-sections -fdata-sections -fPIC --target=wasm32-unknown-unknown")
  cargo:rerun-if-env-changed=CC_wasm32-unknown-unknown
  CC_wasm32-unknown-unknown = None
  cargo:rerun-if-env-changed=CC_wasm32_unknown_unknown
  CC_wasm32_unknown_unknown = Some("clang")
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  cargo:rerun-if-env-changed=CFLAGS_wasm32-unknown-unknown
  CFLAGS_wasm32-unknown-unknown = None
  cargo:rerun-if-env-changed=CFLAGS_wasm32_unknown_unknown
  CFLAGS_wasm32_unknown_unknown = Some("-ffunction-sections -fdata-sections -fPIC --target=wasm32-unknown-unknown")
  cargo:rerun-if-env-changed=CC_wasm32-unknown-unknown
  CC_wasm32-unknown-unknown = None
  cargo:rerun-if-env-changed=CC_wasm32_unknown_unknown
  CC_wasm32_unknown_unknown = Some("clang")
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  cargo:rerun-if-env-changed=CFLAGS_wasm32-unknown-unknown
  CFLAGS_wasm32-unknown-unknown = None
  cargo:rerun-if-env-changed=CFLAGS_wasm32_unknown_unknown
  CFLAGS_wasm32_unknown_unknown = Some("-ffunction-sections -fdata-sections -fPIC --target=wasm32-unknown-unknown")
  cargo:rerun-if-env-changed=CC_wasm32-unknown-unknown
  CC_wasm32-unknown-unknown = None
  cargo:rerun-if-env-changed=CC_wasm32_unknown_unknown
  CC_wasm32_unknown_unknown = Some("clang")
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  cargo:rerun-if-env-changed=CFLAGS_wasm32-unknown-unknown
  CFLAGS_wasm32-unknown-unknown = None
  cargo:rerun-if-env-changed=CFLAGS_wasm32_unknown_unknown
  CFLAGS_wasm32_unknown_unknown = Some("-ffunction-sections -fdata-sections -fPIC --target=wasm32-unknown-unknown")
  cargo:rerun-if-env-changed=CC_wasm32-unknown-unknown
  CC_wasm32-unknown-unknown = None
  cargo:rerun-if-env-changed=CC_wasm32_unknown_unknown
  CC_wasm32_unknown_unknown = Some("clang")
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  cargo:rerun-if-env-changed=CFLAGS_wasm32-unknown-unknown
  CFLAGS_wasm32-unknown-unknown = None
  cargo:rerun-if-env-changed=CFLAGS_wasm32_unknown_unknown
  CFLAGS_wasm32_unknown_unknown = Some("-ffunction-sections -fdata-sections -fPIC --target=wasm32-unknown-unknown")
  cargo:rerun-if-env-changed=CC_wasm32-unknown-unknown
  CC_wasm32-unknown-unknown = None
  cargo:rerun-if-env-changed=CC_wasm32_unknown_unknown
  CC_wasm32_unknown_unknown = Some("clang")
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  cargo:rerun-if-env-changed=CFLAGS_wasm32-unknown-unknown
  CFLAGS_wasm32-unknown-unknown = None
  cargo:rerun-if-env-changed=CFLAGS_wasm32_unknown_unknown
  CFLAGS_wasm32_unknown_unknown = Some("-ffunction-sections -fdata-sections -fPIC --target=wasm32-unknown-unknown")
  cargo:rerun-if-env-changed=CC_wasm32-unknown-unknown
  CC_wasm32-unknown-unknown = None
  cargo:rerun-if-env-changed=CC_wasm32_unknown_unknown
  CC_wasm32_unknown_unknown = Some("clang")
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  cargo:rerun-if-env-changed=CFLAGS_wasm32-unknown-unknown
  CFLAGS_wasm32-unknown-unknown = None
  cargo:rerun-if-env-changed=CFLAGS_wasm32_unknown_unknown
  CFLAGS_wasm32_unknown_unknown = Some("-ffunction-sections -fdata-sections -fPIC --target=wasm32-unknown-unknown")
  cargo:rerun-if-env-changed=CC_wasm32-unknown-unknown
  CC_wasm32-unknown-unknown = None
  cargo:rerun-if-env-changed=CC_wasm32_unknown_unknown
  CC_wasm32_unknown_unknown = Some("clang")
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  cargo:rerun-if-env-changed=CFLAGS_wasm32-unknown-unknown
  CFLAGS_wasm32-unknown-unknown = None
  cargo:rerun-if-env-changed=CFLAGS_wasm32_unknown_unknown
  CFLAGS_wasm32_unknown_unknown = Some("-ffunction-sections -fdata-sections -fPIC --target=wasm32-unknown-unknown")
  cargo:rerun-if-env-changed=CC_wasm32-unknown-unknown
  CC_wasm32-unknown-unknown = None
  cargo:rerun-if-env-changed=CC_wasm32_unknown_unknown
  CC_wasm32_unknown_unknown = Some("clang")
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  cargo:rerun-if-env-changed=CFLAGS_wasm32-unknown-unknown
  CFLAGS_wasm32-unknown-unknown = None
  cargo:rerun-if-env-changed=CFLAGS_wasm32_unknown_unknown
  CFLAGS_wasm32_unknown_unknown = Some("-ffunction-sections -fdata-sections -fPIC --target=wasm32-unknown-unknown")
  cargo:warning=error: unable to create target: 'No available targets are compatible with triple "wasm32-unknown-unknown"'
  cargo:warning=1 error generated.

  --- stderr

  error occurred: Command "clang" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "--target=wasm32-unknown-unknown" "-ffunction-sections" "-fdata-sections" "-fPIC" "--target=wasm32-unknown-unknown" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding" "-fomit-frame-pointer" "-ffile-prefix-map=/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/usr/src/sbo_tmp/rustc-1.79.0-src/build/x86_64-unknown-linux-gnu/stage1-std/wasm32-unknown-unknown/release/build/compiler_builtins-338202080ced6965/out/9729f8276d8a41f4-addvdi3.o" "-c" "/usr/src/sbo_tmp/rustc-1.79.0-src/src/llvm-project/compiler-rt/lib/builtins/addvdi3.c" with args clang did not execute successfully (status code exit status: 1).

```

If I run the command manually, it works just fine (exit code `0`), but then it's also using my system clang and I'm not sure rust is doing so too.

This is the `config.toml` I'm using:

```rust
[llvm]
ccache = "/usr/bin/ccache"
link-shared = true

[build]
build = "x86_64-unknown-linux-gnu"
host = ["x86_64-unknown-linux-gnu"]
target = ["wasm32-unknown-unknown"]
tools = ["analysis"]
submodules = false
vendor = true
extended = true
rustc = "/usr/bin/rustc"
cargo = "/usr/bin/cargo"
docs = false

[install]
prefix = "/usr"
docdir = "doc/rust-wasm-1.79.0"
libdir = "lib64"
mandir = "man"

[rust]
codegen-units = 0
channel = "stable"
rpath = false
codegen-tests = false

```

Full sources for my build are here, but not sure that's necessary: [Index of /pprkut/current/source/rust-wasm/](https://repo.liwjatan.org/pprkut/current/source/rust-wasm/)

---

<div class="post-metadata">

**Author:** ![bjorn3](https://sea2.discourse-cdn.com/flex002/user_avatar/internals.rust-lang.org/bjorn3/32/2736_2.png) [@bjorn3](https://internals.rust-lang.org/u/bjorn3)\
**Post date:** [July 17, 2024, 2:48pm UTC](https://internals.rust-lang.org/t/build-error-when-trying-to-compile-wasm-target/21192/2 "2024-07-17T14:48:09Z")

</div>

I think this is the build script of compiler-builtins trying to compile some C code using a clang that has WebAssembly support disabled when it was built. You can try setting `build.optimized-compiler-builtins = false` in config.toml to avoid building any C code at the cost of the resulting wasm binaries being a bit slower.

By the way you should probably copy just `lib/rustlib/wasm32-unknown-unknown` (and any licenses) into the output directory from which the package is created rather than list a lot of things to remove before copying the entire build directory into the package. If you use `./x.py dist std` you should already get a single tarball with just the wasm32-unknown-unknown standard library and licenses.

---

<div class="post-metadata">

**Author:** ![ehuss](https://avatars.discourse-cdn.com/v4/letter/e/9de0a6/32.png) [@ehuss](https://internals.rust-lang.org/u/ehuss)\
**Post date:** [July 17, 2024, 3:15pm UTC](https://internals.rust-lang.org/t/build-error-when-trying-to-compile-wasm-target/21192/3 "2024-07-17T15:15:39Z")

</div>

As bjorn3 mentioned, this is because of optimized-compiler-builtins. In particular, I do not think it works with clang. The Rust project builds its wasm32-unknown-unknown target with `CC=gcc-9`.

---

<div class="post-metadata">

**Author:** ![bjorn3](https://sea2.discourse-cdn.com/flex002/user_avatar/internals.rust-lang.org/bjorn3/32/2736_2.png) [@bjorn3](https://internals.rust-lang.org/u/bjorn3)\
**Post date:** [July 17, 2024, 3:27pm UTC](https://internals.rust-lang.org/t/build-error-when-trying-to-compile-wasm-target/21192/4 "2024-07-17T15:27:46Z")

</div>

GCC doesn't have a wasm backend at all afaik.

---

<div class="post-metadata">

**Author:** ![ehuss](https://avatars.discourse-cdn.com/v4/letter/e/9de0a6/32.png) [@ehuss](https://internals.rust-lang.org/u/ehuss)\
**Post date:** [July 19, 2024, 1:36am UTC](https://internals.rust-lang.org/t/build-error-when-trying-to-compile-wasm-target/21192/5 "2024-07-19T01:36:41Z")

</div>

Oh, yea. Then I don't fully understand what's going on with compiler-builtins in our environment. I enabled debug, and I can see that it is building compiler-rt with gcc-9. Is it just building x86\_64 linux binaries that are then ignored somehow?

> **Build log**
>
> ```rust
> cargo:rerun-if-changed=build.rs
> cargo:compiler-rt=/cargo/registry/src/index.crates.io-6f17d22bba15001f/compiler_builtins-0.1.109/compiler-rt
> cargo:rustc-cfg=feature="unstable"
> cargo:rustc-cfg=feature="mem"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/absvdi2.c
> cargo:rustc-cfg=__absvdi2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/absvsi2.c
> cargo:rustc-cfg=__absvsi2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/absvti2.c
> cargo:rustc-cfg=__absvti2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/addvdi3.c
> cargo:rustc-cfg=__addvdi3="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/addvsi3.c
> cargo:rustc-cfg=__addvsi3="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/addvti3.c
> cargo:rustc-cfg=__addvti3="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/clzdi2.c
> cargo:rustc-cfg=__clzdi2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/clzsi2.c
> cargo:rustc-cfg=__clzsi2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/clzti2.c
> cargo:rustc-cfg=__clzti2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/cmpdi2.c
> cargo:rustc-cfg=__cmpdi2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/cmpti2.c
> cargo:rustc-cfg=__cmpti2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/ctzdi2.c
> cargo:rustc-cfg=__ctzdi2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/ctzsi2.c
> cargo:rustc-cfg=__ctzsi2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/ctzti2.c
> cargo:rustc-cfg=__ctzti2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/divdc3.c
> cargo:rustc-cfg=__divdc3="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/divsc3.c
> cargo:rustc-cfg=__divsc3="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/extendhfsf2.c
> cargo:rustc-cfg=__extendhfsf2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/ffsti2.c
> cargo:rustc-cfg=__ffsti2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/int_util.c
> cargo:rustc-cfg=__int_util="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/muldc3.c
> cargo:rustc-cfg=__muldc3="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/mulsc3.c
> cargo:rustc-cfg=__mulsc3="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/mulvdi3.c
> cargo:rustc-cfg=__mulvdi3="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/mulvsi3.c
> cargo:rustc-cfg=__mulvsi3="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/mulvti3.c
> cargo:rustc-cfg=__mulvti3="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/negdf2.c
> cargo:rustc-cfg=__negdf2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/negdi2.c
> cargo:rustc-cfg=__negdi2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/negsf2.c
> cargo:rustc-cfg=__negsf2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/negti2.c
> cargo:rustc-cfg=__negti2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/negvdi2.c
> cargo:rustc-cfg=__negvdi2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/negvsi2.c
> cargo:rustc-cfg=__negvsi2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/negvti2.c
> cargo:rustc-cfg=__negvti2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/paritydi2.c
> cargo:rustc-cfg=__paritydi2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/paritysi2.c
> cargo:rustc-cfg=__paritysi2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/parityti2.c
> cargo:rustc-cfg=__parityti2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/popcountdi2.c
> cargo:rustc-cfg=__popcountdi2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/popcountsi2.c
> cargo:rustc-cfg=__popcountsi2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/popcountti2.c
> cargo:rustc-cfg=__popcountti2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/subvdi3.c
> cargo:rustc-cfg=__subvdi3="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/subvsi3.c
> cargo:rustc-cfg=__subvsi3="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/subvti3.c
> cargo:rustc-cfg=__subvti3="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/truncdfhf2.c
> cargo:rustc-cfg=__truncdfhf2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/truncsfhf2.c
> cargo:rustc-cfg=__truncsfhf2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/ucmpdi2.c
> cargo:rustc-cfg=__ucmpdi2="optimized-c"
> cargo:rerun-if-changed=/checkout/src/llvm-project/compiler-rt/lib/builtins/ucmpti2.c
> cargo:rustc-cfg=__ucmpti2="optimized-c"
> TARGET = Some("wasm32-unknown-unknown")
> OPT_LEVEL = Some("3")
> HOST = Some("x86_64-unknown-linux-gnu")
> cargo:rerun-if-env-changed=CC_wasm32-unknown-unknown
> CC_wasm32-unknown-unknown = None
> cargo:rerun-if-env-changed=CC_wasm32_unknown_unknown
> CC_wasm32_unknown_unknown = Some("sccache gcc-9")
> cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
> running: "gcc-9" "-E" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/11025918994847648379detect_
> compiler_family.c"
> exit status: 0
> # 1 "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/11025918994847648379detect_compiler_family.c"
> # 1 "<built-in>"
> # 1 "<command-line>"
> # 31 "<command-line>"
> # 1 "/usr/include/stdc-predef.h" 1 3 4
> # 32 "<command-line>" 2
> # 1 "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/11025918994847648379detect_compiler_family.c"
> 
> # 6 "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/11025918994847648379detect_compiler_family.c"
> #pragma message "gcc"
> # 6 "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/11025918994847648379detect_compiler_family.c"
> 
> running: "gcc-9" "-?"
> cargo:warning=gcc-9: error: unrecognized command line option ‘-?’
> cargo:warning=gcc-9: fatal error: no input files
> cargo:warning=compilation terminated.
> exit status: 1
> cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
> CRATE_CC_NO_DEFAULTS = None
> DEBUG = Some("false")
> CARGO_CFG_TARGET_FEATURE = Some("mutable-globals,sign-ext")
> cargo:rerun-if-env-changed=CFLAGS_wasm32-unknown-unknown
> CFLAGS_wasm32-unknown-unknown = None
> cargo:rerun-if-env-changed=CFLAGS_wasm32_unknown_unknown
> CFLAGS_wasm32_unknown_unknown = Some("-ffunction-sections -fdata-sections -fPIC")
> cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
> running: "gcc-9" "-E" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/6136265953736845165detect_c
> ompiler_family.c"
> exit status: 0
> # 1 "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/6136265953736845165detect_compiler_family.c"
> # 1 "<built-in>"
> # 1 "<command-line>"
> # 31 "<command-line>"
> # 1 "/usr/include/stdc-predef.h" 1 3 4
> # 32 "<command-line>" 2
> # 1 "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/6136265953736845165detect_compiler_family.c"
> 
> # 6 "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/6136265953736845165detect_compiler_family.c"
> #pragma message "gcc"
> # 6 "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/6136265953736845165detect_compiler_family.c"
> 
> running: "gcc-9" "-?"
> cargo:warning=gcc-9: error: unrecognized command line option ‘-?’
> cargo:warning=gcc-9: fatal error: no input files
> cargo:warning=compilation terminated.
> exit status: 1
> cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
> CRATE_CC_NO_DEFAULTS = None
> CARGO_CFG_TARGET_FEATURE = Some("mutable-globals,sign-ext")
> cargo:rerun-if-env-changed=CFLAGS_wasm32-unknown-unknown
> CFLAGS_wasm32-unknown-unknown = None
> cargo:rerun-if-env-changed=CFLAGS_wasm32_unknown_unknown
> CFLAGS_wasm32_unknown_unknown = Some("-ffunction-sections -fdata-sections -fPIC")
> cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
> running: "gcc-9" "-E" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/4130729437123335706detect_c
> ompiler_family.c"
> exit status: 0
> # 1 "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/4130729437123335706detect_compiler_family.c"
> # 1 "<built-in>"
> # 1 "<command-line>"
> # 31 "<command-line>"
> # 1 "/usr/include/stdc-predef.h" 1 3 4
> # 32 "<command-line>" 2
> # 1 "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/4130729437123335706detect_compiler_family.c"
> 
> # 6 "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/4130729437123335706detect_compiler_family.c"
> #pragma message "gcc"
> # 6 "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/4130729437123335706detect_compiler_family.c"
> 
> running: "gcc-9" "-?"
> cargo:warning=gcc-9: error: unrecognized command line option ‘-?’
> cargo:warning=gcc-9: fatal error: no input files
> cargo:warning=compilation terminated.
> exit status: 1
> cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
> CRATE_CC_NO_DEFAULTS = None
> CARGO_CFG_TARGET_FEATURE = Some("mutable-globals,sign-ext")
> cargo:rerun-if-env-changed=CFLAGS_wasm32-unknown-unknown
> CFLAGS_wasm32-unknown-unknown = None
> cargo:rerun-if-env-changed=CFLAGS_wasm32_unknown_unknown
> CFLAGS_wasm32_unknown_unknown = Some("-ffunction-sections -fdata-sections -fPIC")
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-absvdi2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/absvdi2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-absvsi2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/absvsi2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-absvti2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/absvti2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-addvdi3.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/addvdi3.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-addvsi3.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/addvsi3.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-addvti3.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/addvti3.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-clzdi2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/clzdi2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-clzsi2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/clzsi2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-clzti2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/clzti2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-cmpdi2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/cmpdi2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-cmpti2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/cmpti2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-ctzdi2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/ctzdi2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-ctzsi2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/ctzsi2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-ctzti2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/ctzti2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-divdc3.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/divdc3.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-divsc3.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/divsc3.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-extendhfsf2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/extendhfsf2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-ffsti2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/ffsti2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-int_util.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/int_util.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-muldc3.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/muldc3.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-mulsc3.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/mulsc3.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-mulvdi3.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/mulvdi3.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-mulvsi3.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/mulvsi3.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-mulvti3.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/mulvti3.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-negdf2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/negdf2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-negdi2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/negdi2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-negsf2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/negsf2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-negti2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/negti2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-negvdi2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/negvdi2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-negvsi2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/negvsi2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-negvti2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/negvti2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-paritydi2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/paritydi2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-paritysi2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/paritysi2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-parityti2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/parityti2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-popcountdi2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/popcountdi2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-popcountsi2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/popcountsi2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-popcountti2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/popcountti2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-subvdi3.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/subvdi3.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-subvsi3.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/subvsi3.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-subvti3.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/subvti3.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-truncdfhf2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/truncdfhf2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-truncsfhf2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/truncsfhf2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-ucmpdi2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/ucmpdi2.c"
> exit status: 0
> running: "sccache" "gcc-9" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fPIC" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding"
> "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-ucmpti2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/ucmpti2.c"
> exit status: 0
> cargo:rerun-if-env-changed=AR_wasm32-unknown-unknown
> AR_wasm32-unknown-unknown = None
> cargo:rerun-if-env-changed=AR_wasm32_unknown_unknown
> AR_wasm32_unknown_unknown = Some("ar")
> cargo:rerun-if-env-changed=ARFLAGS_wasm32-unknown-unknown
> ARFLAGS_wasm32-unknown-unknown = None
> cargo:rerun-if-env-changed=ARFLAGS_wasm32_unknown_unknown
> ARFLAGS_wasm32_unknown_unknown = None
> cargo:rerun-if-env-changed=TARGET_ARFLAGS
> TARGET_ARFLAGS = None
> cargo:rerun-if-env-changed=ARFLAGS
> ARFLAGS = None
> running: ZERO_AR_DATE="1" "ar" "cq" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/libcompiler-r
> t.a" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-absvdi2.o" "/checkout/obj/b
> uild/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-absvsi2.o" "/checkout/obj/build/x86_64-unknown-l
> inux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-absvti2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/w
> asm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-addvdi3.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown
> /release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-addvsi3.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compil
> er_builtins-dd12fd277b6f7431/out/45c91108d938afe8-addvti3.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277
> b6f7431/out/45c91108d938afe8-clzdi2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d9
> 38afe8-clzsi2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-clzti2.o" "/che
> ckout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-cmpdi2.o" "/checkout/obj/build/x86_64
> -unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-cmpti2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/sta
> ge2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-ctzdi2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown
> -unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-ctzsi2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build
> /compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-ctzti2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd1
> 2fd277b6f7431/out/45c91108d938afe8-divdc3.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c9
> 1108d938afe8-divsc3.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-extendhfs
> f2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-ffsti2.o" "/checkout/obj/b
> uild/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-int_util.o" "/checkout/obj/build/x86_64-unknown-
> linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-muldc3.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/w
> asm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-mulsc3.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/
> release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-mulvdi3.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compile
> r_builtins-dd12fd277b6f7431/out/45c91108d938afe8-mulvsi3.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b
> 6f7431/out/45c91108d938afe8-mulvti3.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d9
> 38afe8-negdf2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-negdi2.o" "/che
> ckout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-negsf2.o" "/checkout/obj/build/x86_64
> -unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-negti2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/sta
> ge2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-negvdi2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknow
> n-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-negvsi2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/bui
> ld/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-negvti2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-
> dd12fd277b6f7431/out/45c91108d938afe8-paritydi2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/ou
> t/45c91108d938afe8-paritysi2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-
> parityti2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-popcountdi2.o" "/ch
> eckout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-popcountsi2.o" "/checkout/obj/build/
> x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-popcountti2.o" "/checkout/obj/build/x86_64-unknown-li
> nux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-subvdi3.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wa
> sm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-subvsi3.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/
> release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-subvti3.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compile
> r_builtins-dd12fd277b6f7431/out/45c91108d938afe8-truncdfhf2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd2
> 77b6f7431/out/45c91108d938afe8-truncsfhf2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c9
> 1108d938afe8-ucmpdi2.o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/45c91108d938afe8-ucmpti2.
> o"
> exit status: 0
> running: "ar" "s" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out/libcompiler-rt.a"
> exit status: 0
> cargo:rustc-link-lib=static=compiler-rt
> cargo:rustc-link-search=native=/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/wasm32-unknown-unknown/release/build/compiler_builtins-dd12fd277b6f7431/out
> 
> ```

---

<div class="post-metadata">

**Author:** ![pprkut](https://sea2.discourse-cdn.com/flex002/user_avatar/internals.rust-lang.org/pprkut/32/12345_2.png) [@pprkut](https://internals.rust-lang.org/u/pprkut)\
**Post date:** [July 19, 2024, 11:28am UTC](https://internals.rust-lang.org/t/build-error-when-trying-to-compile-wasm-target/21192/6 "2024-07-19T11:28:55Z")

</div>

I tried a couple more things on my side:

- Building with the system llvm works (`llvm-config = "/usr/bin/llvm-config"` in `config.toml` for the relevant targets)
- Building with rust's llvm, but disabling building clang and pointing the wasm target to the system clang works too (`clang = false` in the `llvm` section of `config.toml` and `cc = "/usr/bin/clang"` for the wasm target)
- Just disabling building clang, without pointing the wasm target to the system clang does not work
- Building all targets with the system clang didn't work. Something with the x86\_64 targets didn't like clang, and by default it's picking up gcc.

So, from my point of view, it looks like the llvm/clang that rust builds during bootstrap isn't working (for me?) for the wasm target. I'm not sure why though, because the `WebAssembly` support **is** built. Perhaps it doesn't find the necessary includes or some such?

---

<div class="post-metadata">

**Author:** ![system](https://sea2.discourse-cdn.com/flex002/user_avatar/internals.rust-lang.org/system/32/14092_2.png) [@system](https://internals.rust-lang.org/u/system)\
**Post date:** [October 17, 2024, 11:29am UTC](https://internals.rust-lang.org/t/build-error-when-trying-to-compile-wasm-target/21192/7 "2024-10-17T11:29:27Z")

</div>

Closed on October 17, 2024, 11:29am UTC

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