SDL使用

       SDL的头文件一般在/usr/include/SDL里面（跟具体的安装路径有关），输入以下指令查找相关的同文件。

$ find /usr/include -name SDL*.h
/usr/include/SDL/SDL_keysym.h
/usr/include/SDL/SDL_types.h
/usr/include/SDL/SDL_mouse.h
/usr/include/SDL/SDL_rwops.h
/usr/include/SDL/SDL_opengl.h
/usr/include/SDL/SDL_stdinc.h
/usr/include/SDL/SDL_config.h
/usr/include/SDL/SDL_keyboard.h
/usr/include/SDL/SDL_platform.h
/usr/include/SDL/SDL_name.h
/usr/include/SDL/SDL_version.h
/usr/include/SDL/SDL_cdrom.h
/usr/include/SDL/SDL_joystick.h
/usr/include/SDL/SDL_byteorder.h
/usr/include/SDL/SDL.h
/usr/include/SDL/SDL_timer.h
/usr/include/SDL/SDL_audio.h
/usr/include/SDL/SDL_error.h
/usr/include/SDL/SDL_video.h
/usr/include/SDL/SDL_active.h
/usr/include/SDL/SDL_getenv.h
/usr/include/SDL/SDL_ttf.h
/usr/include/SDL/SDL_quit.h
/usr/include/SDL/SDL_mixer.h
/usr/include/SDL/SDL_mutex.h
/usr/include/SDL/SDL_events.h
/usr/include/SDL/SDL_cpuinfo.h
/usr/include/SDL/SDL_thread.h
/usr/include/SDL/SDL_main.h
/usr/include/SDL/SDL_syswm.h
/usr/include/SDL/SDL_image.h
/usr/include/SDL/SDL_loadso.h
/usr/include/SDL/SDL_endian.h

      查看so文件输入以下指令：

$ find /usr/lib -name libSDL*/usr/lib/i386-linux-gnu/libSDL_mixer-1.2.so.0/usr/lib/i386-linux-gnu/libSDL_ttf.a/usr/lib/i386-linux-gnu/libSDL_image-1.2.so.0/usr/lib/i386-linux-gnu/libSDL_image.so/usr/lib/i386-linux-gnu/libSDL_image-1.2.so.0.8.4/usr/lib/i386-linux-gnu/libSDLmain.a/usr/lib/i386-linux-gnu/libSDL_image.a/usr/lib/i386-linux-gnu/libSDL_ttf-2.0.so.0.10.1/usr/lib/i386-linux-gnu/libSDL_ttf.so/usr/lib/i386-linux-gnu/libSDL-1.2.so.0.11.4/usr/lib/i386-linux-gnu/libSDL_mixer-1.2.so.0.12.0/usr/lib/i386-linux-gnu/libSDL_mixer.so/usr/lib/i386-linux-gnu/libSDL-1.2.so.0/usr/lib/i386-linux-gnu/libSDL_ttf-2.0.so.0/usr/lib/i386-linux-gnu/libSDL_mixer.a/usr/lib/i386-linux-gnu/libSDL.so/usr/lib/i386-linux-gnu/libSDL.a/usr/lib/libSDLmain.a/usr/lib/libSDL.la/usr/lib/libSDL-1.2.so.0.11.4/usr/lib/libSDL-1.2.so.0/usr/lib/libSDLmain.la/usr/lib/libSDL.so/usr/lib/libSDL.a

编译的时候，只需要加上“-I  /usr/include/SDL   -L  /usr/libSDL”就可以了。
以上参数可以用如下指令生成：

`sdl-config --cflags`
`sdl-config --libs`

sdl-config是一个shell脚本，可以通过which sdl-config找到其位置，然后查看其内容。

$ which sdl-config
/usr/bin/sdl-config
$ cat /usr/bin/sdl-config
#!/bin/sh

prefix=/usr
exec_prefix=${prefix}
exec_prefix_set=no
libdir=${exec_prefix}/lib

#usage="\
#Usage: sdl-config [--prefix[=DIR]] [--exec-prefix[=DIR]] [--version] [--cflags] [--libs]"
usage="\
Usage: sdl-config [--prefix[=DIR]] [--exec-prefix[=DIR]] [--version] [--cflags] [--libs] [--static-libs]"

if test $# -eq 0; then
      echo "${usage}" 1>&2
      exit 1
fi

while test $# -gt 0; do
  case "$1" in
  -*=*) optarg=`echo "$1" | LC_ALL="C" sed 's/[-_a-zA-Z0-9]*=//'` ;;
  *) optarg= ;;
  esac

  case $1 in
    --prefix=*)
      prefix=$optarg
      if test $exec_prefix_set = no ; then
        exec_prefix=$optarg
      fi
      ;;
    --prefix)
      echo $prefix
      ;;
    --exec-prefix=*)
      exec_prefix=$optarg
      exec_prefix_set=yes
      ;;
    --exec-prefix)
      echo $exec_prefix
      ;;
    --version)
      echo 1.2.15
      ;;
    --cflags)
      echo -I${prefix}/include/SDL  -D_REENTRANT
      ;;
    --libs)
      echo -L${exec_prefix}/lib -Wl,-rpath,${libdir} -lSDL  -lpthread
      ;;
    --static-libs)
#    --libs|--static-libs)
      echo -L${exec_prefix}/lib -Wl,-rpath,${libdir} -lSDL  -lpthread  -lm -ldl -lpthread
      ;;
    *)
      echo "${usage}" 1>&2
      exit 1
      ;;
  esac
  shift
done

如果还用到其它lib，如libSDL_image.so, 则还要加上“ -L  /usr/lib/SDL_image”。

下面是一个Makefile示例:

CC = g++
LD = g++
CFLAGS = `sdl-config --cflags`
LDFLAGS = `sdl-config --libs` -lSDL_image
RM   = /bin/rm -f
OBJS = test.o
PROG = test
VERS = 0.1.0

.PHONY: clean distclean
all: $(PROG)
$(PROG): $(OBJS)
    $(LD) $(LDFLAGS) -s -o $(PROG) $(OBJS)
test.o: test.cpp
    $(CC) $(CFLAGS) -O2 -c test.cpp
clean:
    $(RM) *~ $(OBJS) $(PROG)
.PHONY: clean