On Apple M1, objc_library compiled with darwin_x86_64 but cc_library compiled with darwin_arm64, and failed at link time #14803
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Since M1 support was added we started defaulting the CPU for macOS and iOS builds to the host CPU in the case another CPU wasn't passed. This change mirrors bazelbuild#13873, bazelbuild#13440 and https://github.com/bazelbuild/rules_apple//commit/99e5b631bf060358241a8eaabd285be5c120490f in the newer starlark transition. Without this you end up with architecture mismatches for builds. Fixes bazelbuild#14803
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Thanks for the repro case, fix here! #14816 |
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@bazel-io fork 5.1 |
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As a temporary workaround you can probably pass |
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Since M1 support was added we started defaulting the CPU for macOS and iOS builds to the host CPU in the case another CPU wasn't passed. This change mirrors bazelbuild#13873, bazelbuild#13440 and https://github.com/bazelbuild/rules_apple//commit/99e5b631bf060358241a8eaabd285be5c120490f in the newer starlark transition. Without this you end up with architecture mismatches for builds. Fixes bazelbuild#14803 Closes bazelbuild#14816. PiperOrigin-RevId: 431641312 (cherry picked from commit 1ec1068)
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Since M1 support was added we started defaulting the CPU for macOS and iOS builds to the host CPU in the case another CPU wasn't passed. This change mirrors #13873, #13440 and https://github.com/bazelbuild/rules_apple//commit/99e5b631bf060358241a8eaabd285be5c120490f in the newer starlark transition. Without this you end up with architecture mismatches for builds. Fixes #14803 Closes #14816. PiperOrigin-RevId: 431641312 (cherry picked from commit 1ec1068) Co-authored-by: Keith Smiley <[email protected]>
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…led with darwin_x86_64 rather than darwin_arm64 See bazelbuild/bazel#14803 for further details
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Description of the problem / feature request:
I have a project uses both cc_library and objc_library to compile for MacOS X platform.
The project could compile and run properly until I switched to Apple M1 based MacOS X.
I discovered that on M1 MacOS X, Bazel compiles objc_library with darwin_x86_64 platform and compiles
cc_library/cc_binary with darwin_arm64 platform. Therefore, the project no longer links these two libraries successfully.
The compilation fails at link-time with this error message:
ld: warning: ignoring file bazel-out/applebin_macos-darwin_x86_64-dbg-ST-cfb676c6944e/bin/test/libmacfile.a, building for macOS-arm64 but attempting to link with file built for macOS-x86_64
Undefined symbols for architecture arm64:
Bugs: what's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.
I have a minimal example project to reproduce this problem, please find the attached file.
objc_apple_m1_linker.zip
unzip objc_apple_m1_linker.zip
cd objc_apple_m1_linker
bazel build -c dbg //test -s
ls -al bazel-out/
drwxr-xr-x 3 merck wheel 96 Feb 11 18:38 applebin_macos-darwin_x86_64-dbg-ST-cfb676c6944e
drwxr-xr-x 4 merck wheel 128 Feb 11 18:38 darwin_arm64-dbg
What operating system are you running Bazel on?
Apple M1 (ARM64) MacOS X 12.2.1
bazel version is 6.0.0-pre.20220112.2 (Darwin ARM64 variant bazel-6.0.0-pre.20220112.2-darwin-arm64)
What's the output of
bazel info release?release 6.0.0-pre.20220112.2
Have you found anything relevant by searching the web?
I tried, but I didn't find anything similar.
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