configure: Deduce the path to sdl-config from the compiler
[picodrive.git] / configure
1 #!/bin/sh
2 # some elements originated from qemu configure
3 set -e
4
5 TMPC="/tmp/picodrive-conf-${RANDOM}-$$-${RANDOM}.c"
6 TMPO="/tmp/picodrive-conf-${RANDOM}-$$-${RANDOM}.o"
7 TMPB="/tmp/picodrive-conf-${RANDOM}-$$-${RANDOM}"
8 trap "rm -f $TMPC $TMPO $TMPB" EXIT INT QUIT TERM
9 rm -f config.log
10
11 compile_object()
12 {
13   c="$CC $CFLAGS -c $TMPC -o $TMPO $@"
14   echo $c >> config.log
15   $c >> config.log 2>&1
16 }
17
18 compile_binary()
19 {
20   c="$CC $CFLAGS $TMPC -o $TMPB $LDFLAGS $@"
21   echo $c >> config.log
22   $c >> config.log 2>&1
23 }
24
25 check_define()
26 {
27   $CC -E -dD $CFLAGS pico/arm_features.h | grep -q $1 || return 1
28   return 0
29 }
30
31 # setting options to "yes" or "no" will make that choice default,
32 # "" means "autodetect".
33
34 platform_list="generic pandora gp2x"
35 platform="generic"
36 sound_driver_list="oss alsa sdl"
37 sound_drivers=""
38 have_armv5=""
39 have_armv6=""
40 have_armv7=""
41 have_arm_neon=""
42 have_libavcodec=""
43 need_sdl="no"
44 need_xlib="no"
45 # these are for known platforms
46 optimize_cortexa8="no"
47 optimize_arm926ej="no"
48 optimize_arm920="no"
49
50 # hardcoded stuff
51 CC="${CC-${CROSS_COMPILE}gcc}"
52 CXX="${CXX-${CROSS_COMPILE}g++}"
53 AS="${AS-${CROSS_COMPILE}as}"
54 SDL_CONFIG="`$CC --print-sysroot`/usr/bin/sdl-config"
55 MAIN_LDLIBS="$LDLIBS -lm"
56 config_mak="config.mak"
57
58 fail()
59 {
60   echo "$@"
61   exit 1
62 }
63
64 # call during arg parsing, so that cmd line can override platform defaults
65 set_platform()
66 {
67   platform=$1
68   case "$platform" in
69   generic)
70     ;;
71   pandora)
72     sound_drivers="oss alsa"
73     optimize_cortexa8="yes"
74     have_arm_neon="yes"
75     ;;
76   gp2x)
77     sound_drivers="oss"
78     optimize_arm920="yes"
79     CFLAGS="$CFLAGS -D__GP2X__"
80     if [ "$CROSS_COMPILE" = "arm-linux-" ]; then
81       # still using static, dynamic linking slows Wiz 1-10%
82       # also libm on F100 is not compatible
83       MAIN_LDLIBS="$MAIN_LDLIBS -static"
84     fi
85     ;;
86   *)
87     fail "unsupported platform: $platform"
88     ;;
89   esac
90 }
91
92 for opt do
93   optarg=`expr "x$opt" : 'x[^=]*=\(.*\)'` || true
94   case "$opt" in
95   --help|-h) show_help="yes"
96   ;;
97   --platform=*) set_platform "$optarg"
98   ;;
99   --sound-drivers=*) sound_drivers="$optarg"
100   ;;
101   *) echo "ERROR: unknown option $opt"; show_help="yes"
102   ;;
103   esac
104 done
105
106 if [ "$show_help" = "yes" ]; then
107   echo "options:"
108   echo "  --help                   print this message"
109   echo "  --platform=NAME          target platform [$platform]"
110   echo "                           available: $platform_list"
111   echo "  --sound-drivers=LIST     sound output drivers [guessed]"
112   echo "                           available: $sound_driver_list"
113   echo "influential environment variables:"
114   echo "  CROSS_COMPILE CC CXX AS CFLAGS ASFLAGS LDFLAGS LDLIBS"
115   exit 1
116 fi
117
118 # validate selections
119 if [ "x$sound_drivers" != "x" ]; then
120   for d in $sound_drivers; do
121     if ! echo $sound_driver_list | grep -q "\<$d\>"; then
122       fail "unsupported sound driver: $sound_driver"
123     fi
124   done
125 fi
126
127 if ! test -f "platform/libpicofe/README"; then
128   fail "libpicofe is missing, please run 'git submodule update --init'"
129 fi
130
131 #if [ "$need_warm" = "yes" ]; then
132 #  if ! test -f "frontend/warm/README"; then
133 #    fail "wARM is missing, please run 'git submodule init && git submodule update'"
134 #  fi
135 #fi
136
137 # basic compiler test
138 cat > $TMPC <<EOF
139 int main(void) { return 0; }
140 EOF
141 if ! compile_binary; then
142   fail "compiler test failed, please check config.log"
143 fi
144
145 if [ -z "$ARCH" ]; then
146   ARCH=`$CC -dumpmachine | awk -F '-' '{print $1}'`
147 fi
148
149 case "$ARCH" in
150 arm*)
151   # ARM stuff
152   ARCH="arm"
153
154   if [ "$optimize_cortexa8" = "yes" ]; then
155     CFLAGS="$CFLAGS -mcpu=cortex-a8 -mtune=cortex-a8"
156     ASFLAGS="$ASFLAGS -mcpu=cortex-a8"
157   fi
158   if [ "$optimize_arm926ej" = "yes" ]; then
159     CFLAGS="$CFLAGS -mcpu=arm926ej-s -mtune=arm926ej-s"
160     ASFLAGS="$ASFLAGS -mcpu=arm926ej-s -mfloat-abi=softfp"
161   fi
162   if [ "$optimize_arm920" = "yes" ]; then
163     CFLAGS="$CFLAGS -mcpu=arm920t -mtune=arm920t"
164     ASFLAGS="$ASFLAGS -mcpu=arm920t -mfloat-abi=soft"
165   fi
166
167   if [ "x$have_arm_neon" = "x" ]; then
168     # detect NEON from user-supplied cflags to enable asm code
169     have_arm_neon=`check_define __ARM_NEON__ && echo yes` || true
170   fi
171   if [ "x$have_armv7" = "x" ]; then
172     if check_define HAVE_ARMV7; then
173       have_armv7="yes"
174       have_armv6="yes"
175       have_armv5="yes"
176     fi
177   fi
178   if [ "x$have_armv6" = "x" ]; then
179     if check_define HAVE_ARMV6; then
180       have_armv6="yes"
181       have_armv5="yes"
182     fi
183   fi
184   if [ "x$have_armv5" = "x" ]; then
185     have_armv5=`check_define HAVE_ARMV5 && echo yes` || true
186   fi
187
188   # automatically set mfpu and mfloat-abi if they are not set
189   if [ "$have_arm_neon" = "yes" ]; then
190     fpu="neon"
191   elif [ "$have_armv6" = "yes" ]; then
192     fpu="vfp"
193   fi
194   if [ "x$fpu" != "x" ]; then
195     echo "$CFLAGS" | grep -q -- '-mfpu=' || CFLAGS="$CFLAGS -mfpu=$fpu"
196     echo "$ASFLAGS" | grep -q -- '-mfpu=' || ASFLAGS="$ASFLAGS -mfpu=$fpu"
197     floatabi_set_by_gcc=`$CC -v 2>&1 | grep -q -- --with-float= && echo yes` || true
198     if [ "$floatabi_set_by_gcc" != "yes" ]; then
199       echo "$CFLAGS" | grep -q -- '-mfloat-abi=' || CFLAGS="$CFLAGS -mfloat-abi=softfp"
200       echo "$ASFLAGS" | grep -q -- '-mfloat-abi=' || ASFLAGS="$ASFLAGS -mfloat-abi=softfp"
201     fi
202   fi
203
204   # must disable thumb as recompiler can't handle it
205   if check_define __thumb__; then
206     CFLAGS="$CFLAGS -marm"
207   fi
208
209   # warn about common mistakes
210   if [ "$platform" != "gp2x" -a "$have_armv5" != "yes" ]; then
211     if ! echo "$CFLAGS" | grep -q -- '-mcpu=\|-march='; then
212       echo "Warning: compiling for ARMv4, is that really what you want?"
213       echo "You probably should specify -mcpu= or -march= like this:"
214       echo "  CFLAGS=-march=armv6 ./configure ..."
215     fi
216   fi
217   if [ "$have_arm_neon" = "yes" -a "$have_armv7" != "yes" ]; then
218     echo "Warning: compiling for NEON, but not ARMv7?"
219     echo "You probably want to specify -mcpu= or -march= like this:"
220     echo "  CFLAGS=-march=armv7-a ./configure ..."
221   fi
222   ;;
223 *)
224   ;;
225 esac
226
227 case "$platform" in
228 generic)
229   need_sdl="yes"
230   ;;
231 esac
232
233 # header/library presence tests
234 check_zlib()
235 {
236   cat > $TMPC <<EOF
237   #include <zlib.h>
238   int main(void) { uncompress(0, 0, 0, 0); }
239 EOF
240   compile_binary
241 }
242
243 check_libpng()
244 {
245   cat > $TMPC <<EOF
246   #include <png.h>
247   void main() { png_init_io(0, 0); }
248 EOF
249 #  compile_binary
250   compile_object
251 }
252
253 check_oss()
254 {
255   cat > $TMPC <<EOF
256   #include <sys/soundcard.h>
257   #include <sys/ioctl.h>
258   void main() { int a=0; ioctl(0, SNDCTL_DSP_SETFMT, &a); }
259 EOF
260   compile_binary
261 }
262
263 check_alsa()
264 {
265   cat > $TMPC <<EOF
266   #include <alsa/asoundlib.h>
267   void main() { snd_pcm_open(0, 0, 0, 0); }
268 EOF
269   compile_binary "$@"
270 }
271
272 check_sdl()
273 {
274   cat > $TMPC <<EOF
275   #include <SDL.h>
276   void main() { SDL_OpenAudio(0, 0); }
277 EOF
278   compile_binary "$@"
279 }
280
281 check_libavcodec()
282 {
283   cat > $TMPC <<EOF
284   #include <libavcodec/avcodec.h>
285   void main() { avcodec_decode_audio3(0, 0, 0, 0); }
286 EOF
287   compile_object "$@"
288 }
289
290 #MAIN_LDLIBS="$MAIN_LDLIBS -lz"
291 #check_zlib || fail "please install zlib (libz-dev)"
292
293 MAIN_LDLIBS="-lpng $MAIN_LDLIBS"
294 check_libpng || fail "please install libpng (libpng-dev)"
295
296 if check_libavcodec; then
297   have_libavcodec="yes"
298   # add -ldl if needed
299   case "$MAIN_LDLIBS" in
300     *"-ldl"*) ;;
301     *) MAIN_LDLIBS="-ldl $MAIN_LDLIBS" ;;
302   esac
303 fi
304
305 # find what audio support we can compile
306 if [ "x$sound_drivers" = "x" ]; then
307   if check_oss; then sound_drivers="$sound_drivers oss"; fi
308   if check_alsa -lasound; then
309     sound_drivers="$sound_drivers alsa"
310     MAIN_LDLIBS="-lasound $MAIN_LDLIBS"
311   fi
312   if [ "$need_sdl" = "yes" ] || check_sdl `$SDL_CONFIG --cflags --libs`; then
313     sound_drivers="$sound_drivers sdl"
314     need_sdl="yes"
315   fi
316 else
317   if echo $sound_drivers | grep -q "\<oss\>"; then
318     check_oss || fail "oss support is missing"
319   fi
320   if echo $sound_drivers | grep -q "\<alsa\>"; then
321     MAIN_LDLIBS="-lasound $MAIN_LDLIBS"
322     check_alsa -lasound || fail "please install libasound2-dev"
323   fi
324 fi
325
326 if [ "$need_sdl" = "yes" ]; then
327   [ -x "$SDL_CONFIG" ] || \
328     fail "sdl-config is missing; please install libsdl (libsdl1.2-dev)"
329   CFLAGS="$CFLAGS `$SDL_CONFIG --cflags`"
330   MAIN_LDLIBS="`$SDL_CONFIG --libs` $MAIN_LDLIBS"
331   check_sdl `$SDL_CONFIG --libs` || fail "please install libsdl (libsdl1.2-dev)"
332 fi
333
334 cat > $TMPC <<EOF
335 void test(void *f, void *d) { fread(d, 1, 1, f); }
336 EOF
337 if compile_object -Wno-unused-result; then
338   CFLAGS="$CFLAGS -Wno-unused-result"
339 fi
340
341 # set things that failed to autodetect to "no"
342 test "x$have_armv6" != "x" || have_armv6="no"
343 test "x$have_armv7" != "x" || have_armv7="no"
344 test "x$have_libavcodec" != "x" || have_libavcodec="no"
345
346 echo "architecture        $ARCH"
347 echo "platform            $platform"
348 echo "sound drivers       $sound_drivers"
349 echo "C compiler          $CC"
350 echo "C compiler flags    $CFLAGS"
351 echo "libraries           $MAIN_LDLIBS"
352 echo "linker flags        $LDFLAGS"
353 echo "libavcodec (mp3)    $have_libavcodec"
354 # echo "ARMv7 optimizations $have_armv7"
355
356 echo "# Automatically generated by configure" > $config_mak
357 printf "# Configured with:" >> $config_mak
358 printf " '%s'" "$0" "$@" >> $config_mak
359 echo >> $config_mak
360
361 echo "CC = $CC" >> $config_mak
362 echo "CXX = $CXX" >> $config_mak
363 echo "AS = $AS" >> $config_mak
364 echo "CFLAGS += $CFLAGS" >> $config_mak
365 echo "ASFLAGS += $ASFLAGS" >> $config_mak
366 echo "LDFLAGS += $LDFLAGS" >> $config_mak
367 echo "LDLIBS += $MAIN_LDLIBS" >> $config_mak
368 echo >> $config_mak
369
370 echo "ARCH = $ARCH" >> $config_mak
371 echo "PLATFORM = $platform" >> $config_mak
372 echo "SOUND_DRIVERS = $sound_drivers" >> $config_mak
373 if [ "$have_libavcodec" = "yes" ]; then
374   echo "HAVE_LIBAVCODEC = 1" >> $config_mak
375 fi
376
377 # GP2X toolchains are too old for UAL asm,
378 # so add this here to not litter main Makefile
379 if [ "$platform" = "g1p2x" ]; then
380   echo >> $config_mak
381   echo "%.o: %.S" >> $config_mak
382   echo "        $(CC) $(CFLAGS) -E -c $^ -o /tmp/$(notdir $@).s" >> $config_mak
383   echo "        $(AS) $(ASFLAGS) /tmp/$(notdir $@).s -o $@" >> $config_mak
384 fi
385
386 # use pandora's skin (for now)
387 test -e skin || ln -s platform/pandora/skin skin
388
389 # vim:shiftwidth=2:expandtab