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@perex.cz> 5dnl Last modification: $Id: alsa.m4,v 1.24 2004/09/15 18:48:07 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="$LIBS" 20alsa_found=yes 21 22dnl 23dnl Get the cflags and libraries for alsa 24dnl 25AC_ARG_WITH(alsa-prefix, 26[ --with-alsa-prefix=PFX Prefix where Alsa library is installed(optional)], 27[alsa_prefix="$withval"], [alsa_prefix=""]) 28 29AC_ARG_WITH(alsa-inc-prefix, 30[ --with-alsa-inc-prefix=PFX Prefix where include libraries are (optional)], 31[alsa_inc_prefix="$withval"], [alsa_inc_prefix=""]) 32 33dnl FIXME: this is not yet implemented 34AC_ARG_ENABLE(alsatest, 35[ --disable-alsatest Do not try to compile and run a test Alsa program], 36[enable_alsatest="$enableval"], 37[enable_alsatest=yes]) 38 39dnl Add any special include directories 40AC_MSG_CHECKING(for ALSA CFLAGS) 41if test "$alsa_inc_prefix" != "" ; then 42 ALSA_CFLAGS="$ALSA_CFLAGS -I$alsa_inc_prefix" 43 CFLAGS="$CFLAGS -I$alsa_inc_prefix" 44fi 45AC_MSG_RESULT($ALSA_CFLAGS) 46 47dnl add any special lib dirs 48AC_MSG_CHECKING(for ALSA LDFLAGS) 49if test "$alsa_prefix" != "" ; then 50 ALSA_LIBS="$ALSA_LIBS -L$alsa_prefix" 51 LDFLAGS="$LDFLAGS $ALSA_LIBS" 52fi 53 54dnl add the alsa library 55ALSA_LIBS="$ALSA_LIBS -lasound -lm -ldl -lpthread" 56LIBS="$ALSA_LIBS $LIBS" 57AC_MSG_RESULT($ALSA_LIBS) 58 59dnl Check for a working version of libasound that is of the right version. 60if test "x$enable_alsatest" = "xyes"; then 61min_alsa_version=ifelse([$1], ,0.1.1,$1) 62AC_MSG_CHECKING(for libasound headers version >= $min_alsa_version) 63no_alsa="" 64 alsa_min_major_version=`echo $min_alsa_version | \ 65 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'` 66 alsa_min_minor_version=`echo $min_alsa_version | \ 67 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'` 68 alsa_min_micro_version=`echo $min_alsa_version | \ 69 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'` 70 71AC_LANG_SAVE 72AC_LANG_C 73AC_TRY_COMPILE([ 74#include <alsa/asoundlib.h> 75], [ 76/* ensure backward compatibility */ 77#if !defined(SND_LIB_MAJOR) && defined(SOUNDLIB_VERSION_MAJOR) 78#define SND_LIB_MAJOR SOUNDLIB_VERSION_MAJOR 79#endif 80#if !defined(SND_LIB_MINOR) && defined(SOUNDLIB_VERSION_MINOR) 81#define SND_LIB_MINOR SOUNDLIB_VERSION_MINOR 82#endif 83#if !defined(SND_LIB_SUBMINOR) && defined(SOUNDLIB_VERSION_SUBMINOR) 84#define SND_LIB_SUBMINOR SOUNDLIB_VERSION_SUBMINOR 85#endif 86 87# if(SND_LIB_MAJOR > $alsa_min_major_version) 88 exit(0); 89# else 90# if(SND_LIB_MAJOR < $alsa_min_major_version) 91# error not present 92# endif 93 94# if(SND_LIB_MINOR > $alsa_min_minor_version) 95 exit(0); 96# else 97# if(SND_LIB_MINOR < $alsa_min_minor_version) 98# error not present 99# endif 100 101# if(SND_LIB_SUBMINOR < $alsa_min_micro_version) 102# error not present 103# endif 104# endif 105# endif 106exit(0); 107], 108 [AC_MSG_RESULT(found.)], 109 [AC_MSG_RESULT(not present.) 110 ifelse([$3], , [AC_MSG_ERROR(Sufficiently new version of libasound not found.)]) 111 alsa_found=no] 112) 113AC_LANG_RESTORE 114fi 115 116dnl Now that we know that we have the right version, let's see if we have the library and not just the headers. 117if test "x$enable_alsatest" = "xyes"; then 118AC_CHECK_LIB([asound], [snd_ctl_open],, 119 [ifelse([$3], , [AC_MSG_ERROR(No linkable libasound was found.)]) 120 alsa_found=no] 121) 122fi 123 124if test "x$alsa_found" = "xyes" ; then 125 ifelse([$2], , :, [$2]) 126 LIBS=`echo $LIBS | sed 's/-lasound//g'` 127 LIBS=`echo $LIBS | sed 's/ //'` 128 LIBS="-lasound $LIBS" 129fi 130if test "x$alsa_found" = "xno" ; then 131 ifelse([$3], , :, [$3]) 132 CFLAGS="$alsa_save_CFLAGS" 133 LDFLAGS="$alsa_save_LDFLAGS" 134 LIBS="$alsa_save_LIBS" 135 ALSA_CFLAGS="" 136 ALSA_LIBS="" 137fi 138 139dnl That should be it. Now just export out symbols: 140AC_SUBST(ALSA_CFLAGS) 141AC_SUBST(ALSA_LIBS) 142]) 143 144