alsa.m4 (4558B)
1############################################################################## 2dnl Configure Paths for Alsa 3dnl Some modifications by Richard Boulton <richard-alsa@tartarus.org> 4dnl Christopher Lansdown <lansdoct@cs.alfred.edu> 5dnl Jaroslav Kysela <perex@suse.cz> 6dnl Last modification: alsa.m4,v 1.23 2004/01/16 18:14:22 tiwai Exp 7dnl AM_PATH_ALSA([MINIMUM-VERSION [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]]) 8dnl Test for libasound, and define ALSA_CFLAGS and ALSA_LIBS as appropriate. 9dnl enables arguments --with-alsa-prefix= 10dnl --with-alsa-enc-prefix= 11dnl --disable-alsatest 12dnl 13dnl For backwards compatibility, if ACTION_IF_NOT_FOUND is not specified, 14dnl and the alsa libraries are not found, a fatal AC_MSG_ERROR() will result. 15dnl 16AC_DEFUN([AM_PATH_ALSA], 17[dnl Save the original CFLAGS, LDFLAGS, and LIBS 18alsa_save_CFLAGS="$CFLAGS" 19alsa_save_LDFLAGS="$LDFLAGS" 20alsa_save_LIBS="$LIBS" 21alsa_found=yes 22 23dnl 24dnl Get the cflags and libraries for alsa 25dnl 26AC_ARG_WITH(alsa-prefix, 27[ --with-alsa-prefix=PFX Prefix where Alsa library is installed(optional)], 28[alsa_prefix="$withval"], [alsa_prefix=""]) 29 30AC_ARG_WITH(alsa-inc-prefix, 31[ --with-alsa-inc-prefix=PFX Prefix where include libraries are (optional)], 32[alsa_inc_prefix="$withval"], [alsa_inc_prefix=""]) 33 34dnl FIXME: this is not yet implemented 35AC_ARG_ENABLE(alsatest, 36[ --disable-alsatest Do not try to compile and run a test Alsa program], 37[enable_alsatest="$enableval"], 38[enable_alsatest=yes]) 39 40dnl Add any special include directories 41AC_MSG_CHECKING(for ALSA CFLAGS) 42if test "$alsa_inc_prefix" != "" ; then 43 ALSA_CFLAGS="$ALSA_CFLAGS -I$alsa_inc_prefix" 44 CFLAGS="$CFLAGS -I$alsa_inc_prefix" 45fi 46AC_MSG_RESULT($ALSA_CFLAGS) 47 48dnl add any special lib dirs 49AC_MSG_CHECKING(for ALSA LDFLAGS) 50if test "$alsa_prefix" != "" ; then 51 ALSA_LIBS="$ALSA_LIBS -L$alsa_prefix" 52 LDFLAGS="$LDFLAGS $ALSA_LIBS" 53fi 54 55dnl add the alsa library 56ALSA_LIBS="$ALSA_LIBS -lasound -lm -ldl -lpthread" 57LIBS=`echo $LIBS | sed 's/-lm//'` 58LIBS=`echo $LIBS | sed 's/-ldl//'` 59LIBS=`echo $LIBS | sed 's/-lpthread//'` 60LIBS=`echo $LIBS | sed 's/ //'` 61LIBS="$ALSA_LIBS $LIBS" 62AC_MSG_RESULT($ALSA_LIBS) 63 64dnl Check for a working version of libasound that is of the right version. 65min_alsa_version=ifelse([$1], ,0.1.1,$1) 66AC_MSG_CHECKING(for libasound headers version >= $min_alsa_version) 67no_alsa="" 68 alsa_min_major_version=`echo $min_alsa_version | \ 69 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'` 70 alsa_min_minor_version=`echo $min_alsa_version | \ 71 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'` 72 alsa_min_micro_version=`echo $min_alsa_version | \ 73 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'` 74 75AC_LANG_SAVE 76AC_LANG_C 77AC_TRY_COMPILE([ 78#include <alsa/asoundlib.h> 79], [ 80/* ensure backward compatibility */ 81#if !defined(SND_LIB_MAJOR) && defined(SOUNDLIB_VERSION_MAJOR) 82#define SND_LIB_MAJOR SOUNDLIB_VERSION_MAJOR 83#endif 84#if !defined(SND_LIB_MINOR) && defined(SOUNDLIB_VERSION_MINOR) 85#define SND_LIB_MINOR SOUNDLIB_VERSION_MINOR 86#endif 87#if !defined(SND_LIB_SUBMINOR) && defined(SOUNDLIB_VERSION_SUBMINOR) 88#define SND_LIB_SUBMINOR SOUNDLIB_VERSION_SUBMINOR 89#endif 90 91# if(SND_LIB_MAJOR > $alsa_min_major_version) 92 exit(0); 93# else 94# if(SND_LIB_MAJOR < $alsa_min_major_version) 95# error not present 96# endif 97 98# if(SND_LIB_MINOR > $alsa_min_minor_version) 99 exit(0); 100# else 101# if(SND_LIB_MINOR < $alsa_min_minor_version) 102# error not present 103# endif 104 105# if(SND_LIB_SUBMINOR < $alsa_min_micro_version) 106# error not present 107# endif 108# endif 109# endif 110exit(0); 111], 112 [AC_MSG_RESULT(found.)], 113 [AC_MSG_RESULT(not present.) 114 ifelse([$3], , [AC_MSG_ERROR(Sufficiently new version of libasound not found.)]) 115 alsa_found=no] 116) 117AC_LANG_RESTORE 118 119dnl Now that we know that we have the right version, let's see if we have the library and not just the headers. 120if test "x$enable_alsatest" = "xyes"; then 121AC_CHECK_LIB([asound], [snd_ctl_open],, 122 [ifelse([$3], , [AC_MSG_ERROR(No linkable libasound was found.)]) 123 alsa_found=no] 124) 125fi 126 127if test "x$alsa_found" = "xyes" ; then 128 ifelse([$2], , :, [$2]) 129 LIBS=`echo $LIBS | sed 's/-lasound//g'` 130 LIBS=`echo $LIBS | sed 's/ //'` 131 LIBS="-lasound $LIBS" 132fi 133if test "x$alsa_found" = "xno" ; then 134 ifelse([$3], , :, [$3]) 135 CFLAGS="$alsa_save_CFLAGS" 136 LDFLAGS="$alsa_save_LDFLAGS" 137 LIBS="$alsa_save_LIBS" 138 ALSA_CFLAGS="" 139 ALSA_LIBS="" 140fi 141 142dnl That should be it. Now just export out symbols: 143AC_SUBST(ALSA_CFLAGS) 144AC_SUBST(ALSA_LIBS) 145])