--- splix-315/splix/Makefile.orig	2019-12-19 03:45:55.356145338 +0000
+++ splix-315/splix/Makefile	2019-12-19 03:46:08.154777039 +0000
@@ -55,8 +55,8 @@
 # +--------------------------------------------------------------------------+
 LANGUAGES	:= cpp c
 
-CC		:= gcc
-CXX		:= g++
+CC		?= gcc
+CXX		?= g++
 RM		:= rm -f
 AR		:= ar crs
 LEX		:= flex
--- splix-315/splix/rules.mk.orig	2019-12-19 12:52:37.243637002 +0000
+++ splix-315/splix/rules.mk	2019-12-19 12:53:01.786931115 +0000
@@ -6,12 +6,12 @@
 
 $(rastertoqpdl_TARGET): $(rastertoqpdl_OBJ)
 	$(call printCmd, $(cmd_link))
-	$(Q)g++ -o $@ $^ $(rastertoqpdl_CXXFLAGS) $(rastertoqpdl_LDFLAGS) \
+	$(Q)$(CXX) -o $@ $^ $(rastertoqpdl_CXXFLAGS) $(rastertoqpdl_LDFLAGS) \
 		$(rastertoqpdl_LIBS)
 
 $(pstoqpdl_TARGET): $(pstoqpdl_OBJ)
 	$(call printCmd, $(cmd_link))
-	$(Q)g++ -o $@ $^ $(pstoqpdl_CXXFLAGS) $(pstoqpdl_LDFLAGS) \
+	$(Q)$(CXX) -o $@ $^ $(pstoqpdl_CXXFLAGS) $(pstoqpdl_LDFLAGS) \
 		$(pstoqpdl_LIBS)
 
 .PHONY: install installcms