$NetBSD$

# Respect env

--- Makefile.orig	2017-11-07 19:42:14.000000000 +0000
+++ Makefile
@@ -1,10 +1,10 @@
-CC=gcc
-CFLAGS=-g -Wall -O2 -Wno-unused-function
+CC	?= gcc
+CFLAGS	?= -g -Wall -O2 -Wno-unused-function
 
 all:seqtk
 
 seqtk:seqtk.c khash.h kseq.h
-		$(CC) $(CFLAGS) seqtk.c -o $@ -lz -lm
+		$(CC) $(CFLAGS) seqtk.c -o $@ $(LDFLAGS) -lz -lm
 
 clean:
 		rm -fr gmon.out *.o ext/*.o a.out seqtk trimadap *~ *.a *.dSYM session*
