diff -ur free42-nologo-3.0.17.orig/gtk/Makefile free42-nologo-3.0.17/gtk/Makefile
--- free42-nologo-3.0.17.orig/gtk/Makefile	2022-12-14 14:03:02.000000000 -0500
+++ free42-nologo-3.0.17/gtk/Makefile	2023-01-24 20:40:20.089407399 -0500
@@ -18,7 +18,7 @@
 PKG_CONFIG ?= pkg-config
 CXX_FOR_BUILD ?= $(CXX)
 
-CFLAGS += -MMD \
+COMPILE_FLAGS = -MMD \
 	 -Wall \
 	 -Wno-parentheses \
 	 -Wno-write-strings \
@@ -40,7 +40,8 @@
 	 -DDECIMAL_GLOBAL_EXCEPTION_FLAGS=1 \
 	 -DDECIMAL_GLOBAL_EXCEPTION_FLAGS_ACCESS_FUNCTIONS=1
 
-CXXFLAGS = $(CFLAGS) \
+CFLAGS += $(COMPILE_FLAGS)
+CXXFLAGS += $(COMPILE_FLAGS) \
 	 -fno-exceptions \
 	 -fno-rtti \
 	 -D_WCHAR_T_DEFINED