Mercurial > sdl-ios-xcode
view Makefile.ds @ 3162:dc1eb82ffdaa
Von: Thomas Zimmermann
Betreff: [SDL] [PATCH] Make static variables const
Datum: Tue, 19 May 2009 19:45:37 +0200
Hi,
this is a set of simple changes which make some of SDL's internal static
arrays constant. The purpose is to shrink the number of write-able
static bytes and thus increase the number of memory pages shared between
SDL applications.
The patch set is against trunk@4513. Each of the attached patch files is
specific to a sub-system. The set is completed by a second mail, because
of the list's 40 KiB limit.
The files readelf-r4513.txt and readelf-const-patch.txt where made by
calling 'readelf -S libSDL.so'. They show the difference in ELF sections
without and with the patch. Some numbers measured on my x86-64:
Before
[13] .rodata PROGBITS 00000000000eaaa0 000eaaa0
0000000000008170 0000000000000000 A 0 0 32
[19] .data.rel.ro PROGBITS 00000000003045e0 001045e0
00000000000023d0 0000000000000000 WA 0 0 32
[23] .data PROGBITS 00000000003076e0 001076e0
0000000000004988 0000000000000000 WA 0 0 32
After
[13] .rodata PROGBITS 00000000000eaaa0 000eaaa0
0000000000009a50 0000000000000000 A 0 0 32
[19] .data.rel.ro PROGBITS 0000000000306040 00106040
0000000000002608 0000000000000000 WA 0 0 32
[23] .data PROGBITS 0000000000309360 00109360
0000000000002e88 0000000000000000 WA 0 0 32
The size of the write-able data section decreased considerably. Some
entries became const-after-relocation, while most of its content went
straight into the read-only data section.
Best regards, Thomas
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 03 Jun 2009 04:37:27 +0000 |
| parents | c5280d33c32a |
| children | b7a48f533966 |
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#LibSDL 1.3 porting and enhancements by Darren Alton (lifning) #LibSDL 1.2.9 DS porting by Troy Davis(GPF) ifeq ($(strip $(DEVKITPRO)),) $(error "Please set DEVKITPRO in your environment (available from http://www.devkitpro.org). export DEVKITPRO=<path to>devkitPro") endif ifeq ($(strip $(DEVKITARM)),) DEVKITARM = $(DEVKITPRO)/devkitARM endif PATH := $(PATH):$(DEVKITARM)/bin CC = arm-eabi-gcc AR = arm-eabi-ar RANLIB = arm-eabi-ranlib #ifdef GL #DEFS += -DSDL_VIDEO_OPENGL=1 #TARGET = libSDL_gl.a #else TARGET = libSDL.a #endif #CFLAGS=$(DEFS) -Iinclude CFLAGS = -mthumb -mthumb-interwork \ -march=armv5te -mtune=arm946e-s \ -O2 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \ -DARM9 -D__NDS__ -I$(DEVKITPRO)/libnds/include -DENABLE_NDS -DNO_SIGNAL_H -DDISABLE_THREADS -DPACKAGE=\"SDL\" -DVERSION=\"1.3\" -DHAVE_ALLOCA_H=1 -DHAVE_ALLOCA=1 \ -Iinclude -Isrc -Isrc/audio -Isrc/cdrom -Isrc/endian -Isrc/events -Isrc/joystick -Isrc/thread/nds -Isrc/thread -Isrc/timer -Isrc/video #src/audio/disk/SDL_diskaudio.c \ #src/audio/dummy/SDL_dummyaudio.c \ SRCS = \ src/SDL.c \ src/SDL_compat.c \ src/SDL_error.c \ src/SDL_fatal.c \ src/audio/nds/SDL_ndsaudio.c \ src/audio/SDL_audio.c \ src/audio/SDL_audiocvt.c \ src/audio/SDL_audiodev.c \ src/audio/SDL_audiotypecvt.c \ src/audio/SDL_mixer.c \ src/audio/SDL_mixer_m68k.c \ src/audio/SDL_mixer_MMX.c \ src/audio/SDL_mixer_MMX_VC.c \ src/audio/SDL_wave.c \ src/cdrom/dummy/SDL_syscdrom.c \ src/cdrom/SDL_cdrom.c \ src/cpuinfo/SDL_cpuinfo.c \ src/events/SDL_events.c \ src/events/SDL_keyboard.c \ src/events/SDL_mouse.c \ src/events/SDL_quit.c \ src/events/SDL_windowevents.c \ src/file/SDL_rwops.c \ src/haptic/SDL_haptic.c \ src/haptic/nds/SDL_syshaptic.c \ src/joystick/nds/SDL_sysjoystick.c \ src/joystick/SDL_joystick.c \ src/stdlib/SDL_getenv.c \ src/stdlib/SDL_iconv.c \ src/stdlib/SDL_malloc.c \ src/stdlib/SDL_qsort.c \ src/stdlib/SDL_stdlib.c \ src/stdlib/SDL_string.c \ src/thread/SDL_thread.c \ src/thread/nds/SDL_syscond.c \ src/thread/nds/SDL_sysmutex.c \ src/thread/nds/SDL_syssem.c \ src/thread/nds/SDL_systhread.c \ src/timer/nds/SDL_systimer.c \ src/timer/SDL_timer.c \ src/video/nds/SDL_ndsevents.c \ src/video/nds/SDL_ndsrender.c \ src/video/nds/SDL_ndsvideo.c \ src/video/dummy/SDL_nullevents.c \ src/video/dummy/SDL_nullrender.c \ src/video/dummy/SDL_nullvideo.c \ src/video/SDL_blit_0.c \ src/video/SDL_blit_1.c \ src/video/SDL_blit_A.c \ src/video/SDL_blit_auto.c \ src/video/SDL_blit.c \ src/video/SDL_blit_copy.c \ src/video/SDL_blit_N.c \ src/video/SDL_blit_slow.c \ src/video/SDL_bmp.c \ src/video/SDL_drawline.c \ src/video/SDL_drawpoint.c \ src/video/SDL_fillrect.c \ src/video/SDL_gamma.c \ src/video/SDL_pixels.c \ src/video/SDL_rect.c \ src/video/SDL_renderer_gl.c \ src/video/SDL_renderer_sw.c \ src/video/SDL_RLEaccel.c \ src/video/SDL_stretch.c \ src/video/SDL_surface.c \ src/video/SDL_video.c \ src/video/SDL_yuv_mmx.c \ src/video/SDL_yuv_sw.c \ OBJS = $(SRCS:.c=.o) TEST = \ test/nds-test-progs/general/general.nds \ test/nds-test-progs/sprite/sprite.nds \ test/nds-test-progs/sprite2/sprite2.nds \ all: $(TARGET) $(TARGET): copy_config \ $(OBJS) $(AR) rc $(TARGET) $(OBJS) -@ ($(RANLIB) $@ || true) >/dev/null 2>&1 install: $(TARGET) @cp libSDL.a $(DEVKITPRO)/libnds/lib/ @mkdir -p $(DEVKITPRO)/libnds/include/SDL/ @cp include/*.h $(DEVKITPRO)/libnds/include/SDL/ nds_test: $(MAKE) -C test/nds-test-progs copy_config: @cp include/SDL_config.h.default include/SDL_config.h clean: rm -f include/SDL_config.h $(OBJS)