[libcxx-commits] [libcxx] 2c8b124 - [libc++] Guard include of <features.h> with __has_include (#127691)

[via libcxx-commits]

Author: Louis Dionne
Date: 2025-02-19T08:21:56-05:00
New Revision: 2c8b1248513624e89b510397224f0f405116f3d3

URL: https://github.com/llvm/llvm-project/commit/2c8b1248513624e89b510397224f0f405116f3d3
DIFF: https://github.com/llvm/llvm-project/commit/2c8b1248513624e89b510397224f0f405116f3d3.diff

LOG: [libc++] Guard include of <features.h> with __has_include (#127691)

Some configurations define __AMDGPU__ or __NVPTX__ on platforms that
don't provide <features.h>, such as CUDA on Mac.

Added: 
    

Modified: 
    libcxx/include/__configuration/platform.h

Removed: 
    


################################################################################
diff  --git a/libcxx/include/__configuration/platform.h b/libcxx/include/__configuration/platform.h
index cff99376ee24b..8d0f8f63f5213 100644
--- a/libcxx/include/__configuration/platform.h
+++ b/libcxx/include/__configuration/platform.h
@@ -32,12 +32,14 @@
 
 // Need to detect which libc we're using if we're on Linux.
 #if defined(__linux__) || defined(__AMDGPU__) || defined(__NVPTX__)
-#  include <features.h>
-#  if defined(__GLIBC_PREREQ)
-#    define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b)
-#  else
-#    define _LIBCPP_GLIBC_PREREQ(a, b) 0
-#  endif // defined(__GLIBC_PREREQ)
+#  if __has_include(<features.h>)
+#    include <features.h>
+#    if defined(__GLIBC_PREREQ)
+#      define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b)
+#    else
+#      define _LIBCPP_GLIBC_PREREQ(a, b) 0
+#    endif // defined(__GLIBC_PREREQ)
+#  endif
 #endif
 
 #ifndef __BYTE_ORDER__