--- a/gtk/Makefile
+++ b/gtk/Makefile
@@ -33,7 +33,8 @@
 	 -DHAVE_SINCOS=1
 
 CXXFLAGS = $(CFLAGS) \
-	 -fno-rtti
+	 -fno-rtti \
+	 ${EXTRA_CXXFLAGS}
 
 LIBS = $(shell $(PKG_CONFIG) --libs gtk+-3.0)
 
@@ -192,7 +193,7 @@
 	./keymap2cc
 
 gcc111libbid.a:
-	sh ./build-intel-lib.sh
+	+sh ./build-intel-lib.sh
 	ln -s IntelRDFPMathLib20U1/TESTS/readtest.c
 
 symlinks: