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char32: only include stdc-predef.h if it is available

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Use the (relatively new) macro __has_include() to check if
stdc-predef.h exists, and only include it if it does.

If stdc-predef.h does not exist, or if the compiler does not implement
__has_include(), stdc-predef.h is *not* included.
This commit is contained in:
Daniel Eklöf 2022-03-19 19:52:21 +01:00
parent c365df495e
commit dcdbb3613c
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1 changed files with 5 additions and 1 deletions
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6
char32.c
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@ -6,8 +6,12 @@
#include <wctype.h>
#include <wchar.h>
#include <stdc-predef.h>
#if defined __has_include
#if __has_include (<stdc-predef.h>)
#include <stdc-predef.h>
#endif
#endif
#define LOG_MODULE "char32"
#define LOG_ENABLE_DBG 0