[llvm] Revert f9146ccbe940d8b8eb15e7686a511a28eb0abc6b (PR #131656)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-libc

Author: Alexey Samsonov (vonosmas)

<details>
<summary>Changes</summary>

This reverts commit f9146ccbe940d8b8eb15e7686a511a28eb0abc6b ([libc][bazel] explicitly use system-provided errno in Bazel builds. (#<!-- -->130663))

This change causes problems in Bazel builds where system errno is set to non-zero before the tests even begin to run - see PR #<!-- -->131650 for the disucssion on how to address this.

---
Full diff: https://github.com/llvm/llvm-project/pull/131656.diff


1 Files Affected:

- (modified) utils/bazel/llvm-project-overlay/libc/libc_configure_options.bzl (-5) 


``````````diff
diff --git a/utils/bazel/llvm-project-overlay/libc/libc_configure_options.bzl b/utils/bazel/llvm-project-overlay/libc/libc_configure_options.bzl
index 672ce8c0723ec..f65da9e98226b 100644
--- a/utils/bazel/llvm-project-overlay/libc/libc_configure_options.bzl
+++ b/utils/bazel/llvm-project-overlay/libc/libc_configure_options.bzl
@@ -44,11 +44,6 @@ 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",
 ]

``````````

</details>


https://github.com/llvm/llvm-project/pull/131656