Due to a recent change in mingw-w64 master [1], libgomp ceases to build:
```
../../../gcc-git/libgomp/target.c:936:21: error: unknown conversion type
character 'l' in format [-Werror=format=]
936 | gomp_fatal ("present clause: !acc_is_present (%p, "
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
```
On line 29 of 'libgomp/libgomp.h' from GCC 9 branch I found this declaration
```
extern void gomp_fatal (const char *, ...)
__attribute__ ((noreturn, format (printf, 1, 2)));
```
, which uses the `printf` attribute, but the `PRIu64` macro from
<inttypes.h> expands to `%llu` because now GCC has `-std=gnu11` by
default, which is only valid with `gnu_printf`.
AFAICS there are three solutions:
1. Revert bfd33f6c0ec5e652cc9911857dd1492ece8d8383 in mingw-w64, or
2. Make GCC treat `format(printf)` as `format(gnu_printf)` if C11 or
C++11 is selected, or
3. Replace `format(printf)` with `format(gnu_printf)` in libgomp source.
What do you think?
[1]
https://github.com/mingw-w64/mingw-w64/commit/bfd33f6c0ec5e652cc9911857dd1492ece8d8383
--
Best regards,
LH_Mouse
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