stdc-predef.h: prevent redefining __STDC_UTF_{16,32}__ macros

Undefine any previous __STDC_UTF_{16,32}__ macros before defining them to prenvent any warnings of redefining macros. This happens as a result of some compiler versions defining the macros themselves.
3 years ago · 8b70486807
1 changed files with 3 additions and 0 deletions
--- a/include/stdc-predef.h
+++ b/include/stdc-predef.h
@ -7,7 +7,10 @@
 #define __STDC_IEC_559__ 1
 #endif

+#undef __STDC_UTF_16__
 #define __STDC_UTF_16__ 1
+
+#undef __STDC_UTF_32__
 #define __STDC_UTF_32__ 1

 #endif