Source: gcc-mingw-w64
Version: 4.9.2-21+15.4
Severity: normal
Hi,
I was investigating why some code that probably should have built
cleanly with this toolchain didn't, and the reason is it turns out
to not be defining _REENTRANT when the -pthread option is passed.
Which is a little bit weirder because at first blush it looks like
it had intended to. Compare:
$ gcc -dumpspecs | grep -B1 _REENTRANT
*cpp:
%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}
$ x86_64-w64-mingw32-gcc -dumpspecs | grep -B1 _REENTRANT
*cpp:
%{posix:-D_POSIX_SOURCE} %{mthreads:-D_MT} %{municode:-DUNICODE}
%{pthread:-D_REENTRANT} %{!no-pthread:-U_REENTRANT}
$ g++ -pthread -dM -E - < /dev/null | grep _REENTRANT
#define _REENTRANT 1
$ x86_64-w64-mingw32-gcc -pthread -dM -E - < /dev/null | grep _REENTRANT
<crickets>
The "!no-pthread" part there, looks to me like either a typo or
something that has outsmarted itself :)
Cheers,
Ron
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