With 0507725 "setup-hooks/strip.sh: run RANLIB on static
archives after stripping" it should now be safe to run strip
on wider range of .a files.
mingw-w64 is a good example where a reference was preserved
to gcc from intermediate stage. Enabling stripping by default
decreases `pkgsCross.mingw32` closure for 20%:
Before:
$ nix path-info -rsSh $(nix-build -A pkgsCross.mingw32.stdenv)
...
/nix/store/qzhkidff0wxhqf2gi97ng6qismzvpnbp-stdenv-linux 43.6K 1.0G
After:
$ nix path-info -rsSh $(nix-build -A pkgsCross.mingw32.stdenv)
...
/nix/store/fj4dv1n3sa3jgcb1j3nwn6njsf943n48-stdenv-linux 43.6K 792.4M
d82ce04557