diff --git a/config/Makefile.darwin b/config/Makefile.darwin
index 924adfc..8030f05 100644
--- a/config/Makefile.darwin
+++ b/config/Makefile.darwin
@@ -3,13 +3,16 @@ NAME = $(GLEW_NAME)
 CC = cc
 LD = cc
 CFLAGS.EXTRA += -dynamic -fno-common
-CFLAGS.EXTRA += -std=c89 -pedantic
+CFLAGS.EXTRA += -pedantic
 CFLAGS.EXTRA += -fPIC
 LDFLAGS.EXTRA =
 ifneq (undefined, $(origin GLEW_APPLE_GLX))
+CFLAGS.EXTRA += -std=c99
 CFLAGS.EXTRA += -I/usr/X11R6/include -D'GLEW_APPLE_GLX'
 LDFLAGS.GL = -L/usr/X11R6/lib -lGL -lX11
 else
+CFLAGS.EXTRA += -std=c89
+GLEW_NO_GLU = -DGLEW_NO_GLU
 LDFLAGS.GL = -framework OpenGL
 endif
 LDFLAGS.STATIC =
diff --git a/config/Makefile.darwin-gcc6 b/config/Makefile.darwin-gcc6
index fe06b4c..ecb61b3 100644
--- a/config/Makefile.darwin-gcc6
+++ b/config/Makefile.darwin-gcc6
@@ -4,17 +4,19 @@ GLEW_DEST = /usr/local
 NAME = $(GLEW_NAME)
 CC = gcc-6
 LD = gcc-6
-CFLAGS.EXTRA = -dynamic -fno-common
-CFLAGS.EXTRA += -std=c89
+CFLAGS.EXTRA += -dynamic -fno-common
 CFLAGS.EXTRA += -fPIC
 # Lots of warnings with -pedantic
 # warning: ISO C forbids conversion of object pointer to function pointer type
 #CFLAGS.EXTRA += -pedantic
 LDFLAGS.EXTRA =
 ifneq (undefined, $(origin GLEW_APPLE_GLX))
+CFLAGS.EXTRA += -std=c99
 CFLAGS.EXTRA += -I/usr/X11R6/include -D'GLEW_APPLE_GLX'
 LDFLAGS.GL = -L/usr/X11R6/lib -lGL -lX11
 else
+CFLAGS.EXTRA += -std=c89
+GLEW_NO_GLU = -DGLEW_NO_GLU
 LDFLAGS.GL = -framework OpenGL
 endif
 LDFLAGS.STATIC =
diff --git a/config/Makefile.darwin-ppc b/config/Makefile.darwin-ppc
index 9fbaadd..7a41736 100644
--- a/config/Makefile.darwin-ppc
+++ b/config/Makefile.darwin-ppc
@@ -6,13 +6,16 @@ CC = cc
 LD = cc
 CFLAGS.EXTRA += -arch ppc
 CFLAGS.EXTRA += -dynamic -fno-common
-CFLAGS.EXTRA += -std=c89 -pedantic
+CFLAGS.EXTRA += -pedantic
 CFLAGS.EXTRA += -fPIC
 LDFLAGS.EXTRA = -arch ppc
 ifneq (undefined, $(origin GLEW_APPLE_GLX))
+CFLAGS.EXTRA += -std=c99
 CFLAGS.EXTRA += -I/usr/X11R6/include -D'GLEW_APPLE_GLX'
 LDFLAGS.GL = -L/usr/X11R6/lib -lGL -lX11
 else
+CFLAGS.EXTRA += -std=c89
+GLEW_NO_GLU = -DGLEW_NO_GLU
 LDFLAGS.GL = -framework OpenGL
 endif
 LDFLAGS.STATIC =
diff --git a/config/Makefile.darwin-universal b/config/Makefile.darwin-universal
index 9fe8b67..f2412e3 100644
--- a/config/Makefile.darwin-universal
+++ b/config/Makefile.darwin-universal
@@ -9,14 +9,17 @@ AR =
 LIBTOOL = libtool -static -o
 STRIP = 
 CFLAGS.EXTRA = -dynamic -fno-common
-CFLAGS.EXTRA += -std=c89 -pedantic
+CFLAGS.EXTRA += -pedantic
 CFLAGS.EXTRA += -fPIC
 CFLAGS.EXTRA += -arch i386 -arch x86_64
 LDFLAGS.EXTRA = -arch i386 -arch x86_64
 ifneq (undefined, $(origin GLEW_APPLE_GLX))
+CFLAGS.EXTRA += -std=c99
 CFLAGS.EXTRA += -I/usr/X11R6/include -D'GLEW_APPLE_GLX'
 LDFLAGS.GL = -L/usr/X11R6/lib -lGL -lX11
 else
+CFLAGS.EXTRA += -std=c89
+GLEW_NO_GLU = -DGLEW_NO_GLU
 LDFLAGS.GL = -framework OpenGL
 endif
 LDFLAGS.DYNAMIC =
diff --git a/config/Makefile.darwin-x86_64 b/config/Makefile.darwin-x86_64
index 3bce8e0..dbed967 100644
--- a/config/Makefile.darwin-x86_64
+++ b/config/Makefile.darwin-x86_64
@@ -4,13 +4,16 @@ CC = cc
 LD = cc
 CFLAGS.EXTRA += -arch x86_64
 CFLAGS.EXTRA += -dynamic -fno-common
-CFLAGS.EXTRA += -std=c89 -pedantic
+CFLAGS.EXTRA += -pedantic
 CFLAGS.EXTRA += -fPIC
 LDFLAGS.EXTRA = -arch x86_64
 ifneq (undefined, $(origin GLEW_APPLE_GLX))
+CFLAGS.EXTRA += -std=c99
 CFLAGS.EXTRA += -I/usr/X11R6/include -D'GLEW_APPLE_GLX'
 LDFLAGS.GL = -L/usr/X11R6/lib -lGL -lX11
 else
+CFLAGS.EXTRA += -std=c89
+GLEW_NO_GLU = -DGLEW_NO_GLU
 LDFLAGS.GL = -framework OpenGL
 endif
 LDFLAGS.STATIC =