[libc-commits] [PATCH] D158040: [libc] limits.h: include compiler limits if not already included

[Alfred Persson Forsberg via Phabricator via libc-commits]

alfredfo created this revision.
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The LLVM-libc build itself will override include paths and prefer it's
own limits.h over the compiler's limits.h. Because we rely on the
compiler limits.h for numerical limits in LLVM-libc it needs to be
include_next:ed if not already included. The other method to work
around this is to define all numeric macros in place.

Signed-off-by: Alfred Persson Forsberg <cat at catcream.org>


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D158040

Files:
  libc/include/llvm-libc-macros/limits-macros.h


Index: libc/include/llvm-libc-macros/limits-macros.h
===================================================================
--- libc/include/llvm-libc-macros/limits-macros.h
+++ libc/include/llvm-libc-macros/limits-macros.h
@@ -2,6 +2,10 @@
 #define __LLVM_LIBC_MACROS_LIMITS_MACROS_H
 
 #ifdef __linux__
+#if !defined _GCC_LIMITS_H_ && !defined __CLANG_LIMITS_H &&                    \
+    __has_include_next(<limits.h>)
+#include_next <limits.h>
+#fi
 #include <linux/limits.h>
 #endif
 


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