[core] Strip libCling after build

This is optional during installation, but we always want it because
of the large gains, reducing the size of the library further from
105 MB to 88 MB.

Author: hahnjo

core/metacling/src/CMakeLists.txt

@@ -236,6 +236,10 @@ if(NOT APPLE AND NOT MSVC)
   # After inlining and hiding symbols, some of them are not referenced anymore
   # and can be collected by the linker, reducing the library size.
   target_link_libraries(Cling PRIVATE -Wl,--gc-sections)
+  # Additionally, for Release builds, strip the binary to remove symbol tables.
+  add_custom_command(TARGET Cling POST_BUILD
+    COMMAND $<$<CONFIG:Release>:${CMAKE_STRIP}>
+    ARGS $<TARGET_FILE:Cling>)
 endif()
 
 if (CMAKE_SYSTEM_NAME MATCHES FreeBSD)