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lame-lib: missing libmvec.so.1 with glibc #12554

Open DazzyWalkman opened 4 years ago

DazzyWalkman commented 4 years ago

Package: lame-lib 3.100

PKG_MAINTAINER: @thess

I was compiling x86_64 snapshot r13592 with glibc toolchain and lame-lib was selected as a dependent package by ffmpeg, starting from make dirclean

The compilation failed with error: Missing libmvec.so.1

I manually copied libmvec.so* from ./staging_dir/target-x86_64_glibc/usr/lib/ to ./build_dir/target-x86_64_glibc/lame-3.100/ipkg-x86_64/lame-lib/usr/lib/

Then the package compilation could be resumed without error.

plntyk commented 4 years ago

apparently libmvec is a glibc component - introduced in 2.22 , its a packaging issue of glibc see https://sourceware.org/glibc/wiki/libmvec

also from buildroot fix: "On some architectures (namely x86-64), glibc may provide a libmvec library since glibc 2.22, which programs built with gcc OpenMP support might get linked to."

potential other OpenMP packets might be affected

plntyk commented 4 years ago

cannot replicate that error with ffmpeg in trunk - please post the output of scripts/diffconfig.sh

DazzyWalkman commented 4 years ago

Here is the output of diffconfig. Thanks. diffconfig.out.zip

DazzyWalkman commented 4 years ago

Disabling LAME-LIB_OPTIMIZE_SPEED silence the problem. It seems that "-O3 -ffast-math" will pull in libmvec.so.