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[libc][bazel] explicitly use system-provided errno in Bazel builds. (#130663)

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Addressing the comments from PR #130368 review. Since Bazel builds are
effectively overlay mode, switch to explicitly setting
-DLIBC_ERRNO_MODE=LIBC_ERRNO_MODE_SYSTEM configuration option, so that
unit tests and release builds are consistent. Verified that all the unit
tests pass with this flag specified.
This commit is contained in:
Alexey Samsonov
2025-03-10 13:28:04 -07:00
committed by GitHub
parent c189852218
commit f9146ccbe9
1 changed files with 5 additions and 0 deletions
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5
utils/bazel/llvm-project-overlay/libc/libc_configure_options.bzl
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@@ -44,6 +44,11 @@ LIBC_CONFIGURE_OPTIONS = [
# "LIBC_COPT_STRTOFLOAT_DISABLE_EISEL_LEMIRE",
# "LIBC_COPT_STRTOFLOAT_DISABLE_SIMPLE_DECIMAL_CONVERSION",
# Documentation in libc/src/errno/...
# Since we're only using Bazel for overlay build for now, explicitly
# enforce using the system-provided errno in both tests and release build.
"LIBC_ERRNO_MODE=LIBC_ERRNO_MODE_SYSTEM",
# Documentation in libc/src/__support/libc_assert.h
# "LIBC_COPT_USE_C_ASSERT",
]