https://bugs.gentoo.org/726376
https://bugs.gentoo.org/721888
https://bugs.gentoo.org/729126
--- a/makefile
+++ b/makefile
@@ -18,15 +18,12 @@
 
 MAKE = make	      # needed for some systems e.g. older BSD
 
-CC = cc
-CFLAGS =
 MODEL =
 EXTRA = -DBIG_MEM -DNDEBUG
 LINTFLAGS = -DLINT
-OPTIM = `dpkg-buildflags --get CFLAGS`
+OPTIM = $(CFLAGS)
 OPTIM += -Wall
-OPTIM += `dpkg-buildflags --get CPPFLAGS`
-LDFLAGS = `dpkg-buildflags --get LDFLAGS`
+OPTIM += $(CPPFLAGS)
 
 DESTDIR = /usr/local/bin
 
@@ -102,7 +99,7 @@ bsd:
 
 # Linux
 linux:
-	$(MAKE) CC="gcc" CFLAGS="-c $(OPTIM) $(LINTFLAGS) -DLINUX -DANSI_HDRS" LDFLAGS="$(LDFLAGS)" $(TARGETS)
+	$(MAKE) CC="$(CC)" CFLAGS="-c $(OPTIM) $(LINTFLAGS) -DLINUX -DANSI_HDRS" LDFLAGS="$(LDFLAGS)" $(TARGETS)
 
 # Linux64
 linux64: