Build GLEW for all platforms

Whether it actually should be used or not on some particular platform
is another thing that remains to be seen. But I think it should be
buildable for all?

Don't build the glew programs for non-desktop platforms.

Build only static libraries when DISABLE_DYNLOADING.

No AGL framework, and it's OpenGLES, not OpenGL, on iOS.

Change-Id: Idf3aad341c4f270952db2039d5a5e421f39e728f

external/glew/ExternalProject_glew.mk

@@ -25,7 +25,7 @@ else
 $(call gb_ExternalProject_get_state_target,glew,build) :
 	$(call gb_ExternalProject_run,glew,\
 		$(if $(filter TRUE,$(ENABLE_DEBUG)),STRIP=) LD="$(CC)" \
-			$(MAKE) glew.lib $(if $(filter TRUE,$(ENABLE_DEBUG)),debug) \
+			$(MAKE) glew.lib $(if $(filter DESKTOP,$(BUILD_TYPE)),$(if $(filter TRUE,$(ENABLE_DEBUG)),debug)) \
 	)
 
 endif

external/glew/Module_glew.mk

@@ -9,14 +9,10 @@
 
 $(eval $(call gb_Module_Module,glew))
 
-ifeq ($(CROSS_COMPILING),)
-
 $(eval $(call gb_Module_add_targets,glew,\
 	ExternalProject_glew \
 	UnpackedTarball_glew \
 	ExternalPackage_glew \
 ))
 
-endif
-
 # vim: set noet sw=4 ts=4:

external/glew/UnpackedTarball_glew.mk

@@ -13,6 +13,10 @@ $(eval $(call gb_UnpackedTarball_set_tarball,glew,$(GLEW_TARBALL)))
 
 $(eval $(call gb_UnpackedTarball_set_patchlevel,glew,0))
 
+$(eval $(call gb_UnpackedTarball_fix_end_of_line,glew,\
+	Makefile \
+))
+
 ifeq ($(OS)$(COM),WNTMSC)
 $(eval $(call gb_UnpackedTarball_set_patchflags,glew,--binary))
 $(eval $(call gb_UnpackedTarball_add_patches,glew,\
@@ -31,4 +35,16 @@ $(eval $(call gb_UnpackedTarball_add_patches,glew,\
 ))
 endif
 
+ifeq ($(OS),IOS)
+$(eval $(call gb_UnpackedTarball_add_patches,glew,\
+	external/glew/glew-ios.patch.1 \
+))
+endif
+
+ifeq ($(DISABLE_DYNLOADING),TRUE)
+$(eval $(call gb_UnpackedTarball_add_patches,glew,\
+	external/glew/glew-static-only.patch.1 \
+))
+endif
+
 # vim: set noet sw=4 ts=4:

external/glew/glew-ios.patch.1

+-*- Mode:Diff -*-
+--- glew/config/Makefile.darwin
++++ glew/config/Makefile.darwin
+@@ -8,7 +8,7 @@
+ CFLAGS.EXTRA += -I/usr/X11R6/include -D'GLEW_APPLE_GLX'
+ LDFLAGS.GL = -L/usr/X11R6/lib -lGL -lX11
+ else
+-LDFLAGS.GL = -framework AGL -framework OpenGL
++LDFLAGS.GL = -framework OpenGLES
+ endif
+ LDFLAGS.STATIC =
+ LDFLAGS.DYNAMIC =

external/glew/glew-static-only.patch.1

+-*- Mode:Diff -*-
+--- glew/Makefile
++++ glew/Makefile
+@@ -93,7 +93,7 @@
+ LIB.SOBJS.MX       := $(addprefix tmp/$(SYSTEM)/mx/shared/,$(LIB.SRCS.NAMES))
+ LIB.SOBJS.MX       := $(LIB.SOBJS.MX:.c=.o)
+ 
+-glew.lib: lib lib/$(LIB.SHARED) lib/$(LIB.STATIC) glew.pc
++glew.lib: lib lib/$(LIB.STATIC)
+ 
+ lib:
+ 	mkdir lib