Remove -lgcc_s from the list of library dependencies in .pc file

[marecki315]

When -lgcc_s is in the list of required libraries in .pc, it's impossible to avoid dependency to dynamic libgcc_s.so when linking gcc statically inside target binary using -static-libgcc option.

[K-os]

What happens when you build libvvdec with -static-libgcc ? On my machine that does not add -lgcc_s as a dependency.

[marecki315]

The issue doesn't appear when building libvvdec, but when building a project (application or library) that uses libvvdec and pkgconfig to find the dependency.
If you try to build a binary and link libvvdec statically, these dependencies specified in .pc file will be added:

Libs.private: -lstdc++ -lm -lgcc -lgcc -lgcc_s

When using -static-libgcc, the -lgcc dependency won't appear in target app/lib, but -lgcc_s will still be there.

It is enough to have only -lgcc in Libs.private. -lgcc_s is unnecessary because either libgcc.a or libgcc_s.so needs to be linked.

https://gcc.gnu.org/onlinedocs/gccint/Libgcc.html