Carlo Marcelo Arenas Belón via GitGitGadgetFrom: =?UTF-8?q?Carlo=20Marcelo=20Arenas=20Bel=C3=B3n?= <carenas@gmail.com>
mingw-w64's pthread_unistd.h had a bug that mistakenly (because there is no support for the *lockfile() functions required[1]) defined _POSIX_THREAD_SAFE_FUNCTIONS and that was being worked around since 3ecd153a3b (compat/mingw: support MSys2-based MinGW build, 2016-01-14).
the bug was fixed in winphtreads, but as a sideeffect, leaves the reentrant functions from time.h not longer visible and therefore breaks the build.
since the intention all along was to avoid using the fallback functions, formalize the use of POSIX by setting the corresponding feature flag and to make the intention clearer compile out the fallback functions.
[1] https://unix.org/whitepapers/reentrant.html
Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
---
mingw: avoid fallback for {local,gm}time_r()
This is a cherry-pick from git-for-windows/git@adf0cd8, that is needed
to be able to build recent master with the Git for Windows SDK or recent
MinGW64.
It was discussed recently on list[1], and might need further
adjustements if the 32-bit Git for Windows SDK also updates their
winpthread headers, requiring a similar fix, but since without it a
plain build from master wouldn't work in Windows I think it is worth
reviewing on its own merits, and had withstood the test of time in the
git for windows fork since it was originally merged there late August.
[1] https://lore.kernel.org/git/20211005063936.588874-1-mh@glandium.org/Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-1142%2Fcarenas%2Fwinbuild-v1 Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-1142/carenas/winbuild-v1 Pull-Request: https://github.com/git/git/pull/1142
compat/mingw.c | 2 ++ git-compat-util.h | 4 +++- 2 files changed, 5 insertions(+), 1 deletion(-)
Show changes to 2 files +5 −1
compat/mingw.c, git-compat-util.h
diff --git a/compat/mingw.c b/compat/mingw.c index 9e0cd1e097f..e14f2d5f77c 100644 --- a/compat/mingw.c +++ b/compat/mingw.c @@ -1083,6 +1083,7 @@ int pipe(int filedes[2]) return 0; } +#ifndef __MINGW64__ struct tm *gmtime_r(const time_t *timep, struct tm *result) { if (gmtime_s(result, timep) == 0) @@ -1096,6 +1097,7 @@ struct tm *localtime_r(const time_t *timep, struct tm *result) return result; return NULL; } +#endif char *mingw_getcwd(char *pointer, int len) { diff --git a/git-compat-util.h b/git-compat-util.h index d70ce142861..c8005db3fb6 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -127,7 +127,9 @@ /* Approximation of the length of the decimal representation of this type. */ #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1) -#if defined(__sun__) +#ifdef __MINGW64__ +#define _POSIX_C_SOURCE 1 +#elif defined(__sun__) /* * On Solaris, when _XOPEN_EXTENDED is set, its header file * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE base-commit: cd3e606211bb1cf8bc57f7d76bab98cc17a150bc
-- gitgitgadget
