$OpenBSD: patch-Makefile_in,v 1.1 2020/05/20 17:06:29 bcallah Exp $

Respect CFLAGS.

Index: Makefile.in
--- Makefile.in.orig
+++ Makefile.in
@@ -11,7 +11,7 @@ package_full := $(package_name)-$(package_version)
 instfile := install -m 644
 
 CC := @CC@
-CFLAGS := @CFLAGS@ -pthread -Isrc/include -Imlib/include -I. -DHAVE_CONFIG_H \
+CFLAGS += @CFLAGS@ -pthread -Isrc/include -Imlib/include -I. -DHAVE_CONFIG_H \
  -DPACKAGE_DATA_DIR=\"$(datadir)\"
 LDFLAGS := @LDFLAGS@ -pthread
 LIBS := @LIBS@ -lm
