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| author | Lasse Collin <lasse.collin@tukaani.org> | 2023-09-24 16:32:32 +0300 |
|---|---|---|
| committer | Jia Tan <jiat0218@gmail.com> | 2023-10-31 18:44:59 +0800 |
| commit | 4ae13cfe0dedb8ddc3cf9ded8cd1ac09361b3bd1 (patch) | |
| tree | 3007a0101f4cc8d8374fa8b3b370a99cae4720a0 /src/common | |
| parent | xz: Windows: Don't (de)compress to special files like "con" or "nul". (diff) | |
| download | xz-4ae13cfe0dedb8ddc3cf9ded8cd1ac09361b3bd1.tar.xz | |
sysdefs.h: Update the comment about __USE_MINGW_ANSI_STDIO.
Diffstat (limited to 'src/common')
| -rw-r--r-- | src/common/sysdefs.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/common/sysdefs.h b/src/common/sysdefs.h index 97be4ee3..f04e45dd 100644 --- a/src/common/sysdefs.h +++ b/src/common/sysdefs.h @@ -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 |