This gets rid of recompilation, making things faster and avoids duplicated warnings.
The result seems to be the same:
$ ls -l build/libsystemd.so.0.20.0 build2/libsystemd.so.0.20.0
-rwxrwxr-x. 1 zbyszek zbyszek
3071312 Dec 19 11:45 build2/libsystemd.so.0.20.0
-rwxrwxr-x. 1 zbyszek zbyszek
3071760 Dec 19 11:11 build/libsystemd.so.0.20.0
$ diff -U1 <(objdump -T build/libsystemd.so.0.20.0|sed -r 's/[0-9a-f]{16}/________________/g') <(objdump -T build2/libsystemd.so.0.20.0|sed -r 's/[0-9a-f]{16}/________________/g')
-build/libsystemd.so.0.20.0: file format elf64-x86-64
+build2/libsystemd.so.0.20.0: file format elf64-x86-64
# libsystemd_sym_path = '@0@/@1@'.format(meson.current_source_dir(), libsystemd_sym)
# libsystemd = shared_library(
# 'systemd',
-# libsystemd_sources,
# journal_internal_sources,
# version : libsystemd_version,
# include_directories : includes,
# link_args : ['-shared',
# '-Wl,--version-script=' + libsystemd_sym_path],
-# link_with : [libbasic],
+# link_with : libbasic,
+# link_whole : libsystemd_static,
# dependencies : [threads,
# libgcrypt,
# librt,