Makefile: on x64, prefer /usr/lib64, if it is existent, over /usr/lib. bug reported & fix suggested by @chaostheory88
diff --git a/Makefile b/Makefile
index 3aa935a..de701c2 100644
--- a/Makefile
+++ b/Makefile
@@ -30,14 +30,16 @@
DESTDIR ?=
INCDIR = $(DESTDIR)$(PREFIX)/include
-LIBDIR = $(DESTDIR)$(PREFIX)/lib
-# on x86_64, we might have /usr/lib64 directory instead of /usr/lib
UNAME_M := $(shell uname -m)
UNAME_S := $(shell uname -s)
+
+LIBDIR = $(DESTDIR)$(PREFIX)/lib
+# on x86_64, we might have /usr/lib64 directory instead of /usr/lib
ifeq ($(UNAME_M), x86_64)
-ifeq (,$(wildcard $(LIBDIR)))
+# ignore Mac OSX
ifneq ($(UNAME_S), Darwin)
-LIBDIR = $(DESTDIR)$(PREFIX)/lib64
+ifeq (,$(wildcard $(LIBDIR)64))
+LIBDIR = $(LIBDIR)64
endif
endif
endif