core/pkgs/build-support/setup-hooks/prune-libtool-files.sh
2024-05-13 11:34:52 -04:00

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# Clear dependency_libs in libtool files for shared libraries.
# Shared libraries already encode their dependencies with locations. .la
# files do not always encode those locations, and sometimes encode the
# locations in the wrong Nix output. .la files are not needed for shared
# libraries, but without dependency_libs they do not hurt either.
fixupOutputHooks+=(_pruneLibtoolFiles)
_pruneLibtoolFiles() {
if [ "${dontPruneLibtoolFiles-}" ] || [ ! -e "$prefix" ]; then
return
fi
# Libtool uses "dlname" and "library_names" fields for shared libraries and
# the "old_library" field for static libraries. We are processing only
# those .la files that do not describe static libraries.
find "$prefix" -type f -name '*.la' \
-exec grep -q '^# Generated by .*libtool' {} \; \
-exec grep -q "^old_library=''" {} \; \
-exec sed -i {} -e "/^dependency_libs='[^']/ c dependency_libs='' #pruned" \;
}