Content of RPM
ruby-devel-2.7.4-137.module_el8.4.0+875+807aec38.x86_64.rpm :
/usr/include/rb_mjit_min_header-2.7.4-x86_64.h
/usr/include/rb_mjit_min_header-2.7.4.h
/usr/include/ruby
/usr/include/ruby.h
/usr/include/ruby/assert.h
/usr/include/ruby/backward
/usr/include/ruby/backward.h
/usr/include/ruby/backward/classext.h
/usr/include/ruby/backward/cxxanyargs.hpp
/usr/include/ruby/backward/rubyio.h
/usr/include/ruby/backward/rubysig.h
/usr/include/ruby/backward/st.h
/usr/include/ruby/backward/util.h
/usr/include/ruby/config-x86_64.h
/usr/include/ruby/config.h
/usr/include/ruby/debug.h
/usr/include/ruby/defines.h
/usr/include/ruby/digest.h
/usr/include/ruby/encoding.h
/usr/include/ruby/intern.h
/usr/include/ruby/io.h
/usr/include/ruby/missing.h
/usr/include/ruby/onigmo.h
/usr/include/ruby/oniguruma.h
/usr/include/ruby/re.h
/usr/include/ruby/regex.h
/usr/include/ruby/ruby.h
/usr/include/ruby/st.h
/usr/include/ruby/subst.h
/usr/include/ruby/thread.h
/usr/include/ruby/thread_native.h
/usr/include/ruby/util.h
/usr/include/ruby/version.h
/usr/include/ruby/vm.h
/usr/lib/rpm/macros.d/macros.ruby
/usr/lib64/libruby.so
/usr/lib64/pkgconfig/ruby.pc
/usr/share/licenses/ruby-devel
/usr/share/licenses/ruby-devel/BSDL
/usr/share/licenses/ruby-devel/COPYING
/usr/share/licenses/ruby-devel/COPYING.ja
/usr/share/licenses/ruby-devel/GPL
/usr/share/licenses/ruby-devel/LEGAL