[FFmpeg-devel] [PATCH] configure: fix clang on macOS 10.15

[Carl Eugen Hoyos]

Am Di., 14. Apr. 2020 um 20:49 Uhr schrieb Jan Ekström <jeebjp at gmail.com>:
>
> On Tue, Apr 14, 2020 at 8:45 PM Josh de Kock <josh at itanimul.li> wrote:
> >
> > Works around a bug in the newer Xcode 11's clang with -fstack-check
> > emitting bad code with misaligned call instructions.
> > ---
> >  configure | 5 +++++
> >  1 file changed, 5 insertions(+)
> >
> > diff --git a/configure b/configure
> > index 4d4c429be9..c872a2932d 100755
> > --- a/configure
> > +++ b/configure
> > @@ -5358,6 +5358,11 @@ case $target_os in
> >          fi
> >          version_script='-exported_symbols_list'
> >          VERSION_SCRIPT_POSTPROCESS_CMD='tr " " "\n" | sed -n /global:/,/local:/p | grep ";" | tr ";" "\n" | sed -E "s/(.+)/_\1/g" | sed -E "s/(.+[^*])$$$$/\1*/"'
> > +        # Workaround for Xcode 11 -fstack-check bug
> > +        if enabled clang; then
> > +            clang_version=$($cc -dumpversion)
> > +            test ${clang_version%%.*} -ge 11 && add_cflags -fno-stack-check
>
> I would match what dav1d does so far, and check for equality against
> 11.

> Not greater-or-equal, if I'm reading this correctly.

+1

Carl Eugen