Not only does gnulib key off of the definition of _IOERR to know whether to use its UCRT definitions, but the constants are different between MSVCRT and the (internal) constants in UCRT source.
It turns out that the constants _IOFBF _IOLBF and _IONBF are still present in the UCRT headers (they are used by setvbuf), but I have confirmed none of the others are. Reference: https://github.com/msys2/MINGW-packages/issues/8310 Signed-off-by: Jeremy Drake <jeremyd2...@users.sourceforge.net> --- mingw-w64-headers/crt/stdio.h | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/mingw-w64-headers/crt/stdio.h b/mingw-w64-headers/crt/stdio.h index c7617798..fe15add0 100644 --- a/mingw-w64-headers/crt/stdio.h +++ b/mingw-w64-headers/crt/stdio.h @@ -120,13 +120,13 @@ extern FILE (* __MINGW_IMP_SYMBOL(_iob))[]; /* A pointer to an array of FILE */ #define stderr (__acrt_iob_func(2)) #endif -#define _IOREAD 0x0001 -#define _IOWRT 0x0002 - #define _IOFBF 0x0000 #define _IOLBF 0x0040 #define _IONBF 0x0004 +#ifndef _UCRT +#define _IOREAD 0x0001 +#define _IOWRT 0x0002 #define _IOMYBUF 0x0008 #define _IOEOF 0x0010 #define _IOERR 0x0020 @@ -135,6 +135,7 @@ extern FILE (* __MINGW_IMP_SYMBOL(_iob))[]; /* A pointer to an array of FILE */ #ifdef _POSIX_ #define _IOAPPEND 0x0200 #endif +#endif #define _TWO_DIGIT_EXPONENT 0x1 -- 2.31.1.windows.1 _______________________________________________ Mingw-w64-public mailing list Mingw-w64-public@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mingw-w64-public
