1dnl Configure Paths for Alsa 2dnl Some modifications by Richard Boulton <richard-alsa@tartarus.org> 3dnl Christopher Lansdown <lansdoct@cs.alfred.edu> 4dnl Jaroslav Kysela <perex@suse.cz> 5dnl Last modification: alsa.m4,v 1.23 2004/01/16 18:14:22 tiwai Exp 6dnl AM_PATH_ALSA([MINIMUM-VERSION [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]]) 7dnl Test for libasound, and define ALSA_CFLAGS and ALSA_LIBS as appropriate. 8dnl enables arguments --with-alsa-prefix= 9dnl --with-alsa-enc-prefix= 10dnl --disable-alsatest 11dnl 12dnl For backwards compatibility, if ACTION_IF_NOT_FOUND is not specified, 13dnl and the alsa libraries are not found, a fatal AC_MSG_ERROR() will result. 14dnl 15AC_DEFUN([AM_PATH_ALSA], 16[dnl Save the original CFLAGS, LDFLAGS, and LIBS 17alsa_save_CFLAGS="$CFLAGS" 18alsa_save_LDFLAGS="$LDFLAGS" 19alsa_save_LIBS="$LIBS" 20alsa_found=yes 21 22dnl 23dnl Get the cflags and libraries for alsa 24dnl 25AC_ARG_WITH(alsa-prefix, 26 AC_HELP_STRING([--with-alsa-prefix=PFX], 27 [prefix where Alsa library is installed(optional)]), 28 [alsa_prefix="$withval"], [alsa_prefix=""]) 29 30AC_ARG_WITH(alsa-inc-prefix, 31 AC_HELP_STRING([--with-alsa-inc-prefix=PFX], 32 [prefix where include libraries are (optional)]), 33 [alsa_inc_prefix="$withval"], [alsa_inc_prefix=""]) 34 35dnl FIXME: this is not yet implemented 36dnl AC_ARG_ENABLE(alsatest, 37dnl AC_HELP_STRING([--disable-alsatest], 38dnl [do not try to compile and run a test Alsa program], 39dnl [enable_alsatest=no], [enable_alsatest=yes]) 40 41dnl Add any special include directories 42AC_MSG_CHECKING(for ALSA CFLAGS) 43if test "$alsa_inc_prefix" != "" ; then 44 ALSA_CFLAGS="$ALSA_CFLAGS -I$alsa_inc_prefix" 45 CFLAGS="$CFLAGS -I$alsa_inc_prefix" 46fi 47AC_MSG_RESULT($ALSA_CFLAGS) 48 49dnl add any special lib dirs 50AC_MSG_CHECKING(for ALSA LDFLAGS) 51if test "$alsa_prefix" != "" ; then 52 ALSA_LIBS="$ALSA_LIBS -L$alsa_prefix" 53 LDFLAGS="$LDFLAGS $ALSA_LIBS" 54fi 55 56dnl add the alsa library 57ALSA_LIBS="$ALSA_LIBS -lasound -lm -ldl -lpthread" 58LIBS=`echo $LIBS | sed 's/-lm//'` 59LIBS=`echo $LIBS | sed 's/-ldl//'` 60LIBS=`echo $LIBS | sed 's/-lpthread//'` 61LIBS=`echo $LIBS | sed 's/ //'` 62LIBS="$ALSA_LIBS $LIBS" 63AC_MSG_RESULT($ALSA_LIBS) 64 65dnl Check for a working version of libasound that is of the right version. 66min_alsa_version=ifelse([$1], ,0.1.1,$1) 67AC_MSG_CHECKING(for libasound headers version >= $min_alsa_version) 68no_alsa="" 69 alsa_min_major_version=`echo $min_alsa_version | \ 70 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'` 71 alsa_min_minor_version=`echo $min_alsa_version | \ 72 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'` 73 alsa_min_micro_version=`echo $min_alsa_version | \ 74 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'` 75 76AC_LANG_SAVE 77AC_LANG_C 78AC_TRY_COMPILE([ 79#include <alsa/asoundlib.h> 80], [ 81void main(void) 82{ 83/* ensure backward compatibility */ 84#if !defined(SND_LIB_MAJOR) && defined(SOUNDLIB_VERSION_MAJOR) 85#define SND_LIB_MAJOR SOUNDLIB_VERSION_MAJOR 86#endif 87#if !defined(SND_LIB_MINOR) && defined(SOUNDLIB_VERSION_MINOR) 88#define SND_LIB_MINOR SOUNDLIB_VERSION_MINOR 89#endif 90#if !defined(SND_LIB_SUBMINOR) && defined(SOUNDLIB_VERSION_SUBMINOR) 91#define SND_LIB_SUBMINOR SOUNDLIB_VERSION_SUBMINOR 92#endif 93 94# if(SND_LIB_MAJOR > $alsa_min_major_version) 95 exit(0); 96# else 97# if(SND_LIB_MAJOR < $alsa_min_major_version) 98# error not present 99# endif 100 101# if(SND_LIB_MINOR > $alsa_min_minor_version) 102 exit(0); 103# else 104# if(SND_LIB_MINOR < $alsa_min_minor_version) 105# error not present 106# endif 107 108# if(SND_LIB_SUBMINOR < $alsa_min_micro_version) 109# error not present 110# endif 111# endif 112# endif 113exit(0); 114} 115], 116 [AC_MSG_RESULT(found.)], 117 [AC_MSG_RESULT(not present.) 118 ifelse([$3], , [AC_MSG_ERROR(Sufficiently new version of libasound not found.)]) 119 alsa_found=no] 120) 121AC_LANG_RESTORE 122 123dnl Now that we know that we have the right version, let's see if we have the library and not just the headers. 124if test "x$enable_alsatest" = "xyes"; then 125AC_CHECK_LIB([asound], [snd_ctl_open],, 126 [ifelse([$3], , [AC_MSG_ERROR(No linkable libasound was found.)]) 127 alsa_found=no] 128) 129fi 130 131if test "x$alsa_found" = "xyes" ; then 132 ifelse([$2], , :, [$2]) 133 LIBS=`echo $LIBS | sed 's/-lasound//g'` 134 LIBS=`echo $LIBS | sed 's/ //'` 135 LIBS="-lasound $LIBS" 136fi 137if test "x$alsa_found" = "xno" ; then 138 ifelse([$3], , :, [$3]) 139 CFLAGS="$alsa_save_CFLAGS" 140 LDFLAGS="$alsa_save_LDFLAGS" 141 LIBS="$alsa_save_LIBS" 142 ALSA_CFLAGS="" 143 ALSA_LIBS="" 144fi 145 146dnl That should be it. Now just export out symbols: 147AC_SUBST(ALSA_CFLAGS) 148AC_SUBST(ALSA_LIBS) 149]) 150 151