Hello, thanks! this fixes nicely my problem, and makes useless the two patches I posted here:
please remove and drop: https://patchwork.ffmpeg.org/project/ffmpeg/list/?series=4892 https://patchwork.ffmpeg.org/project/ffmpeg/list/?series=4890 and accept this one whenever possible! thanks Gianfranco Il giorno lun 20 set 2021 alle ore 12:00 Martin Storsjö <mar...@martin.st> ha scritto: > If no --cpu= option was passed to configure, we detect what the > compiler defaults to. This detected value was then fed back to the > rest of the configure logic, as if it was an explicit choice. > > This breaks on Ubuntu 21.10 with GCC 11.1. > > Since GCC 8, it's possible to add configure extra features via the > -march option, like e.g. -march=armv7-a+neon. If the -mfpu= option > is configured to default to 'auto', the fpu setting gets taken > from the -march option. > > GCC 11.1 in Ubuntu seems to be configured to use -mfpu=auto. This > has the effect of breaking any compilation command that specifies > -march=armv7-a, because the driver implicitly also adds -mfloat-abi=hard, > and that combination results in this error: > > cc1: error: ‘-mfloat-abi=hard’: selected processor lacks an FPU > > Therefore, restructure configure. If no specific preference was set > (and the 'cpu' configure variable was set as the output of > probe_arm_arch), the value we tried to set via -march= was the same > value that we just tried to detect as the compiler default. > > So instead, just try to detect what the compiler defaults to, with > to allow setting other configure settings (such as 'fast_unaligned'), > but don't try to spell out the compiler's default via the -march flag. > > Signed-off-by: Martin Storsjö <mar...@martin.st> > --- > configure | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/configure b/configure > index 9249254b70..3a05b8294b 100755 > --- a/configure > +++ b/configure > @@ -5009,9 +5009,11 @@ elif enabled arm; then > fi > } > > - [ "$cpu" = generic ] && cpu=$(probe_arm_arch) > > case $cpu in > + generic) > + subarch=$(probe_arm_arch | sed 's/[^a-z0-9]//g') > + ;; > armv*) > cpuflags="-march=$cpu" > subarch=$(echo $cpu | sed 's/[^a-z0-9]//g') > -- > 2.25.1 > > _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
