On Wed, 1 Sept 2021 at 10:52, Jonathan Wakely <jwakely....@gmail.com> wrote:
>
> On Wed, 1 Sept 2021 at 02:44, Jonathan Yong <10wa...@gmail.com> wrote:
> >
> > On 8/31/21 9:02 AM, Jonathan Wakely wrote:
> > > It looks like my questions about this patch never got an answer, and
> > > it never got applied.
> > >
> > > Could somebody say whether TLS is enabled for native *-*-mingw*
> > > builds? If it is, then we definitely need to add GCC_CHECK_TLS to the
> > > cross-compiler config too.
> > >
> > > For a linux-hosted x86_64-w64-mingw32 cross compiler I see TLS is not
> > > enabled:
> > >
> > > /* Define to 1 if the target supports thread-local storage. */
> > > /* #undef _GLIBCXX_HAVE_TLS */
> > >
> > >
> > >
> > >
> > > On Mon, 19 Feb 2018 at 08:59, Hugo Beauzée-Luyssen <h...@beauzee.fr>
> > > wrote:
> > >>
> > >> libstdc++-v3: Check for TLS support on mingw
> > >>
> > >> 2018-02-16 Hugo Beauzée-Luyssen <h...@beauzee.fr>
> > >>
> > >> * crossconfig.m4: Check for TLS support on mignw
> > >> * configure: regenerate
> > >>
> > >> Index: libstdc++-v3/crossconfig.m4
> > >> ===================================================================
> > >> --- libstdc++-v3/crossconfig.m4 (revision 257730)
> > >> +++ libstdc++-v3/crossconfig.m4 (working copy)
> > >> @@ -197,6 +197,7 @@ case "${host}" in
> > >> GLIBCXX_CHECK_LINKER_FEATURES
> > >> GLIBCXX_CHECK_MATH_SUPPORT
> > >> GLIBCXX_CHECK_STDLIB_SUPPORT
> > >> + GCC_CHECK_TLS
> > >> ;;
> > >> *-netbsd*)
> > >> SECTION_FLAGS='-ffunction-sections -fdata-sections'
> >
> > According to MSYS2 native from
> > https://mirror.msys2.org/mingw/ucrt64/mingw-w64-ucrt-x86_64-gcc-10.3.0-5-any.pkg.tar.zst:
> >
> > x86_64-w64-mingw32/bits/c++config.h:#define _GLIBCXX_HAVE_TLS 1
> >
> > So yes.
>
> Thanks! I'll test the patch on a cross-compiler and apply it soon then.
>
> (Thanks also to LH for the answer)
I've pushed this to trunk now. Thanks for the patch, Hugo. Sorry it
took so long to process.
