From 51bd94fccacce37259256b9a70010d928a9bac62 Mon Sep 17 00:00:00 2001
From: Nigel Stewart <nigels@users.sourceforge.net>
Date: Sun, 25 Dec 2016 00:48:21 +1000
Subject: [PATCH 1/3] Add Mac gcc6 build configuration (gcc via brew)

---
 config/Makefile.darwin-gcc6 | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 config/Makefile.darwin-gcc6

diff --git a/config/Makefile.darwin-gcc6 b/config/Makefile.darwin-gcc6
new file mode 100644
index 0000000..3a04101
--- /dev/null
+++ b/config/Makefile.darwin-gcc6
@@ -0,0 +1,30 @@
+# For building with Brew gcc:
+# $ brew install gcc
+GLEW_DEST = /usr/local
+NAME = $(GLEW_NAME)
+CC = gcc-6
+LD = gcc-6
+CFLAGS.EXTRA = -dynamic -fno-common
+CFLAGS.EXTRA += -std=c89
+# Lots of warnings with -pedantic
+# warning: ISO C forbids conversion of object pointer to function pointer type
+#CFLAGS.EXTRA += -pedantic
+#CFLAGS.EXTRA += -no-cpp-precomp
+LDFLAGS.EXTRA =
+ifneq (undefined, $(origin GLEW_APPLE_GLX))
+CFLAGS.EXTRA += -I/usr/X11R6/include -D'GLEW_APPLE_GLX'
+LDFLAGS.GL = -L/usr/X11R6/lib -lGL -lX11
+else
+LDFLAGS.GL = -framework OpenGL
+endif
+LDFLAGS.STATIC =
+LDFLAGS.DYNAMIC =
+WARN = -Wall -W
+POPT = -Os
+CFLAGS.EXTRA += -fPIC
+BIN.SUFFIX =
+LIB.SONAME    = lib$(NAME).$(SO_MAJOR).dylib
+LIB.DEVLNK    = lib$(NAME).dylib
+LIB.SHARED    = lib$(NAME).$(SO_VERSION).dylib
+LIB.STATIC    = lib$(NAME).a
+LDFLAGS.SO    = -dynamiclib -install_name $(GLEW_DEST)/lib/$(LIB.SHARED) -current_version $(SO_VERSION) -compatibility_version $(SO_MAJOR)

From f426fcee41a89abb9aea55a9ddb54f4f2ee4dbd9 Mon Sep 17 00:00:00 2001
From: Nigel Stewart <nigels@users.sourceforge.net>
Date: Sun, 25 Dec 2016 00:49:20 +1000
Subject: [PATCH 2/3] Tidy up use of unsued parameter attribute for Mac gcc
 builds

---
 src/visualinfo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/visualinfo.c b/src/visualinfo.c
index d089207..99e8c63 100644
--- a/src/visualinfo.c
+++ b/src/visualinfo.c
@@ -617,7 +617,7 @@ VisualInfo (GLContext* ctx)
 #elif defined(__APPLE__) && !defined(GLEW_APPLE_GLX)
 
 void
-VisualInfo (GLContext* __attribute__((__unused__)) ctx)
+VisualInfo (__attribute__((unused)) GLContext* ctx)
 {
 /*
   int attrib[] = { AGL_RGBA, AGL_NONE };

From 5766d27018b84b7bc2b536c8c036112b3767269f Mon Sep 17 00:00:00 2001
From: Nigel Stewart <nigels@users.sourceforge.net>
Date: Sun, 25 Dec 2016 00:50:42 +1000
Subject: [PATCH 3/3] Note that clang is needed for SYSTEM=darwin-universal
 (not supported for gcc)

---
 config/Makefile.darwin-universal | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/config/Makefile.darwin-universal b/config/Makefile.darwin-universal
index 9518f71..7bc4c4c 100644
--- a/config/Makefile.darwin-universal
+++ b/config/Makefile.darwin-universal
@@ -1,3 +1,6 @@
+#
+# Needs to be clang toolchain for universal: -arch i386 -arch x86_64
+#
 GLEW_DEST = /usr/local
 NAME = $(GLEW_NAME)
 CC = cc