commit 6bcbe92268c464c17ee2570758c5faf1f20fdcdb
from: Marcel Rodrigues <marcelgmr@gmail.com>
date: Fri Nov 07 23:02:13 2014 UTC

More portable Makefile.

commit - 93f759852e7bc41422726ca406ca4cb27f69027a
commit + 6bcbe92268c464c17ee2570758c5faf1f20fdcdb
blob - 48a221a49900cdc8a307e3e7027dd5a5e6905567
blob + 4af4a082d2d150cf76424d101512105180ca01e4
--- Makefile
+++ Makefile
@@ -1,10 +1,13 @@
 CLINK = -lcurses
-CFLAGS = -Wall -Wextra -Werror -std=c89
-DEBUG ?= 0
-ifeq ($(DEBUG), 1)
-    CFLAGS += -O0 -g
-else
-    CFLAGS += -O2
+GNU ?= 0
+ifeq ($(GNU), 1)
+    CFLAGS = -Wall -Wextra -Werror -std=c89
+    DEBUG ?= 0
+    ifeq ($(DEBUG), 1)
+        CFLAGS += -O0 -g
+    else
+        CFLAGS += -O2
+    endif
 endif
 
 all : rover