Put package's libs flag after %{objs}
In case LDFLAG contains "-Wl,--as-needed" or "--as-needed" is enabled by
default, "-l" flags should appear after objs specifiction.
MODIFY
tasks/mrbgem_spec.rake
tasks/mrbgem_spec.rake
@@ -135,7 +135,7 @@ module MRuby
if system("pkg-config --exists #{escaped_package_query}")
cc.flags += [`pkg-config --cflags #{escaped_package_query}`.strip]
cxx.flags += [`pkg-config --cflags #{escaped_package_query}`.strip]
- linker.flags += [`pkg-config --libs #{escaped_package_query}`.strip]
+ linker.flags_before_libraries += [`pkg-config --libs #{escaped_package_query}`.strip]
true
else
false

Put package's libs flag after %{objs}

In case LDFLAG contains "-Wl,--as-needed" or "--as-needed" is enabled by
default, "-l" flags should appear after objs specifiction.