REQUIRED_FLAGS should be given in C FLAGS not in library dependencies

modules/find/FindSTARPU.cmake

@@ -874,13 +874,10 @@ if( (NOT PKG_CONFIG_EXECUTABLE) OR (PKG_CONFIG_EXECUTABLE AND NOT STARPU_FOUND)
 
     if(STARPU_WORKS)
       # save link with dependencies
-      if (REQUIRED_FLAGS)
-        set(STARPU_LIBRARIES_DEP "${REQUIRED_FLAGS};${REQUIRED_LIBS}")
-      else()
-        set(STARPU_LIBRARIES_DEP "${REQUIRED_LIBS}")
-      endif()
+      set(STARPU_LIBRARIES_DEP "${REQUIRED_LIBS}")
       set(STARPU_LIBRARY_DIRS_DEP "${REQUIRED_LIBDIRS}")
       set(STARPU_INCLUDE_DIRS_DEP "${REQUIRED_INCDIRS}")
+      set(STARPU_C_FLAGS "${REQUIRED_FLAGS}")
       set(STARPU_LINKER_FLAGS "${REQUIRED_LDFLAGS}")
       list(REMOVE_DUPLICATES STARPU_LIBRARY_DIRS_DEP)
       list(REMOVE_DUPLICATES STARPU_INCLUDE_DIRS_DEP)