diff -uNr abcpp-1.4.6.orig/Makefile abcpp-1.4.6/Makefile
--- abcpp-1.4.6.orig/Makefile	2021-11-16 12:34:01.000000000 +0100
+++ abcpp-1.4.6/Makefile	2022-11-03 13:10:21.905115204 +0100
@@ -5,16 +5,16 @@
 
 ABCPP   = abcpp
 VERSION = 1.4.6
-CC      = gcc
+CC     ?= gcc
 # settings for Linux, djgpp or mingw32
-CFLAGS  = -O3 -Wall -D VERSION=\"$(VERSION)\"
+CFLAGS ?= -O3 -Wall
 # to make a mingw executable using cygwin, use these CFLAGS:
 # CFLAGS = -O3 -Wall -mno-cygwin -DWIN32
 
 SOURCE  = $(ABCPP).c
 
 $(ABCPP): $(SOURCE)
-	$(CC) $(CFLAGS) -o $(ABCPP) $(SOURCE)
+	$(CC) $(CFLAGS) $(LDFLAGS) -DVERSION=\"$(VERSION)\" -o $(ABCPP) $(SOURCE)
 
 tgz:    $(ABCPP)
 	ln -s . $(ABCPP)-$(VERSION); \