Add pkg-config metadata files for libraries (#2680)

Should core, ext, libm, and/or port libraries be properly installed
on some system, help compilation and linking against them by
providing standard `.pc` files, which can be picked up by
pkg-config.

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu

jerry-libm/CMakeLists.txt

@@ -36,5 +36,8 @@ set_property(TARGET ${JERRY_LIBM_NAME}
 
 target_include_directories(${JERRY_LIBM_NAME} PUBLIC ${INCLUDE_LIBM})
 
+configure_file(libjerry-libm.pc.in libjerry-libm.pc @ONLY)
+
 install(TARGETS ${JERRY_LIBM_NAME} DESTINATION lib)
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libjerry-libm.pc DESTINATION lib/pkgconfig)
 install(DIRECTORY ${INCLUDE_LIBM}/ DESTINATION include/jerry-libm)

jerry-libm/libjerry-libm.pc.in

@@ -0,0 +1,10 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+libdir=${prefix}/lib
+includedir=${prefix}/include/jerry-libm
+
+Name: libjerry-libm
+Description: JerryScript: lightweight JavaScript engine (minimal math library)
+URL: https://github.com/pando-project/jerryscript
+Version: 1.0
+Libs: -L${libdir} -ljerry-libm
+Cflags: -I${includedir}