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Using glibc-2.43, for example, before this patch\nevery file that included limits.h would emit a warning if\n-Wsystem-headers was in use.\n\n PR c/125161\n\ngcc/\n\n\t* glimits.h (__STDC_VERSION_LIMITS_H__): Only define the macro\n if it was not already defined.\n---\n gcc/glimits.h | 4 +++-\n 1 file changed, 3 insertions(+), 1 deletion(-)","diff":"diff --git a/gcc/glimits.h b/gcc/glimits.h\nindex 0d08c819ed7..2098016ef8e 100644\n--- a/gcc/glimits.h\n+++ b/gcc/glimits.h\n@@ -162,7 +162,9 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see\n # define BITINT_MAXWIDTH __BITINT_MAXWIDTH__\n # endif\n \n-# define __STDC_VERSION_LIMITS_H__\t202311L\n+# ifndef __STDC_VERSION_LIMITS_H__\n+# define __STDC_VERSION_LIMITS_H__\t202311L\n+# endif\n #endif\n \n #endif /* _LIMITS_H___ */\n","prefixes":[]}