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sysdefs.h: Update the comment about __USE_MINGW_ANSI_STDIO.

This commit is contained in:
Lasse Collin 2023-09-24 16:32:32 +03:00 committed by Jia Tan
parent 660c8c29e5
commit 4ae13cfe0d
1 changed files with 9 additions and 1 deletions
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10
src/common/sysdefs.h
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@ -24,7 +24,15 @@
# include <config.h>
#endif
// Get standard-compliant stdio functions under MinGW and MinGW-w64.
// This #define ensures that C99 and POSIX compliant stdio functions are
// available with MinGW-w64 (both 32-bit and 64-bit). Modern MinGW-w64 adds
// this automatically, for example, when the compiler is in C99 (or later)
// mode when building against msvcrt.dll. It still doesn't hurt to be explicit
// that we always want this and #define this unconditionally.
//
// With Universal CRT (UCRT) this is less important because UCRT contains
// C99-compatible stdio functions. It's still nice to #define this as UCRT
// doesn't support the POSIX thousand separator flag in printf (like "%'u").
#ifdef __MINGW32__
# define __USE_MINGW_ANSI_STDIO 1
#endif