[libcxx] No _LIBCPP_ELAST needed for LLVM libc

[petrhosek]

LLVM libc can handle out-of-range errno values.

[llvmbot]

@llvm/pr-subscribers-libcxx

Author: Petr Hosek (petrhosek)

Changes

LLVM libc can handle out-of-range errno values.

---

Full diff: https://github.com/llvm/llvm-project/pull/108739.diff

1 Files Affected:

• (modified) libcxx/src/include/config_elast.h (+2)

diff --git a/libcxx/src/include/config_elast.h b/libcxx/src/include/config_elast.h
index 899e124ad261b2..158b93e20040dd 100644
--- a/libcxx/src/include/config_elast.h
+++ b/libcxx/src/include/config_elast.h
@@ -21,6 +21,8 @@
 // where strerror/strerror_r can't handle out-of-range errno values.
 #if defined(ELAST)
 #  define _LIBCPP_ELAST ELAST
+#elif defined(__LLVM_LIBC__)
+// No _LIBCPP_ELAST needed for LLVM libc
 #elif defined(_NEWLIB_VERSION)
 #  define _LIBCPP_ELAST __ELASTERROR
 #elif defined(__NuttX__)

[petrhosek]

Ping?

[jhuber6]

Don't know if all libc++ PRs require someone from the team to sign-off, but this is pretty trivial and passed CI so I don't see any reason it shouldn't be approved.

[philnik777]

Don't know if all libc++ PRs require someone from the team to sign-off

Generally yes. In this specific case maybe not, since it only touches a configuration that's not ABI stable, but that's not necessarily trivial to determine.