--- a/src/bin/pg_config/Makefile
+++ b/src/bin/pg_config/Makefile
@@ -22,9 +22,9 @@ STD_CPPFLAGS := $(filter-out -I$(top_src
 STD_LDFLAGS := $(filter-out -L$(top_builddir)/src/port,$(LDFLAGS))
 
 override CPPFLAGS += -DVAL_CONFIGURE="\"$(configure_args)\""
-override CPPFLAGS += -DVAL_CC="\"$(CC)\""
+override CPPFLAGS += -DVAL_CC="\"$(TARGET_CC)\""
 override CPPFLAGS += -DVAL_CPPFLAGS="\"$(STD_CPPFLAGS)\""
-override CPPFLAGS += -DVAL_CFLAGS="\"$(CFLAGS)\""
+override CPPFLAGS += -DVAL_CFLAGS="\"$(TARGET_CFLAGS)\""
 override CPPFLAGS += -DVAL_CFLAGS_SL="\"$(CFLAGS_SL)\""
 override CPPFLAGS += -DVAL_LDFLAGS="\"$(STD_LDFLAGS)\""
 override CPPFLAGS += -DVAL_LDFLAGS_EX="\"$(LDFLAGS_EX)\""