The original Makefile did not pass CFLAGS and LDFLAGS
See bug https://bugs.gentoo.org/727632
Also remove -O3 and stripping
--- a/vxp2ps/Makefile
+++ b/vxp2ps/Makefile
@@ -3,16 +3,16 @@
 all: vxp2ps vxp2tex vxp2dkw
 
 vxp2ps: vxp2ps.c
-	gcc vxp2ps.c -o vxp2ps -lm $(CFLAGSEXTRA)
+	$(CC) vxp2ps.c -o vxp2ps -lm $(CFLAGS) $(CPPFLAGS) $(LDFLAGS)
 
 vxp2tex: vxp2tex.c
-	gcc vxp2tex.c -o vxp2tex -lm
+	$(CC) vxp2tex.c -o vxp2tex -lm $(CFLAGS) $(CPPFLAGS) $(LDFLAGS)
 
 vxp2dkw: vxp2dkw.c
-	gcc vxp2dkw.c -o vxp2dkw -lm
+	$(CC) vxp2dkw.c -o vxp2dkw -lm $(CFLAGS) $(CPPFLAGS) $(LDFLAGS)
 
 install: all
-	install -c -s vxp2ps vxp2tex vxp2dkw "$(DESTDIR)"/usr/bin
+	install -c vxp2ps vxp2tex vxp2dkw "$(DESTDIR)$(BINDIR)"
 
 clean:
 	rm -f core *~ vxp2ps vxp2tex vxp2dkw
--- a/util/Makefile
+++ b/util/Makefile
@@ -10,10 +10,10 @@
 endif
 
 pdfconcat:
-	$(CC) $(CFLAGS) -O3 -s -DNDEBUG=1 -DNO_CONFIG=1 -ansi -pedantic -Wunused -Wall -W -Wnested-externs -Winline -Wpointer-arith -Wbad-function-cast -Wcast-qual -Wmissing-prototypes -Wmissing-declarations pdfconcat.c -o pdfconcat
+	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -DNDEBUG=1 -DNO_CONFIG=1 -ansi -pedantic -Wunused -Wall -W -Wnested-externs -Winline -Wpointer-arith -Wbad-function-cast -Wcast-qual -Wmissing-prototypes -Wmissing-declarations pdfconcat.c -o pdfconcat
 
 ppmtops:
-	$(CC) $(CFLAGS) ppmtops.c -o ppmtops
+	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) ppmtops.c -o ppmtops
 
 ifneq ($(WITH_PGF),no)
 pgf2pnm: main.cpp pnm.cpp