diff -Naur xnecview-1.37.org/Makefile xnecview-1.37/Makefile
--- xnecview-1.37.org/Makefile	2006-03-27 22:38:37.000000000 +0200
+++ xnecview-1.37/Makefile	2022-09-01 19:00:31.929015747 +0200
@@ -3,11 +3,12 @@
 
 
 
-CC	= gcc
-CFLAGS	= -O2 -g -Wall `pkg-config gtk+-2.0 --cflags`
+CC	?= gcc
+CFLAGS	?= -O2 -g -Wall
+CFLAGS	+= `$(PKG_CONFIG) gtk+-2.0 --cflags`
 
-LD	= $(CC)
-LDFLAGS	= `pkg-config gtk+-2.0 --libs` -lm
+LD	?= $(CC)
+LDFLAGS	+= `$(PKG_CONFIG) gtk+-2.0 --libs` -lm
 
 ifeq ($(PNG),yes)
 CFLAGS	+= -DHAVE_LIBPNG
@@ -20,7 +21,7 @@
 all:	xnecview
 
 xnecview:	$(OBJS)
-	$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS)  -o xnecview
+	$(CC) $(CFLAGS) $(OBJS) $(LDFLAGS) -o xnecview
 
 xnecview.tgz:	$(SRCS)
 	tar czvf xnecview.tgz COPYING README HISTORY Imakefile Imakefile_nopng Makefile $(SRCS) xnecview.h config.h xnecview.1x xnecview.man