1 ############################################################################## 2 dnl Configure Paths for Alsa 3 dnl Some modifications by Richard Boulton <richard-alsa@tartarus.org> 4 dnl Christopher Lansdown <lansdoct@cs.alfred.edu> 5 dnl Jaroslav Kysela <perex@suse.cz> 6 dnl Last modification: alsa.m4,v 1.23 2004/01/16 18:14:22 tiwai Exp 7 dnl AM_PATH_ALSA([MINIMUM-VERSION [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]]) 8 dnl Test for libasound, and define ALSA_CFLAGS and ALSA_LIBS as appropriate. 9 dnl enables arguments --with-alsa-prefix= 10 dnl --with-alsa-enc-prefix= 11 dnl --disable-alsatest 12 dnl 13 dnl For backwards compatibility, if ACTION_IF_NOT_FOUND is not specified, 14 dnl and the alsa libraries are not found, a fatal AC_MSG_ERROR() will result. 15 dnl 16 AC_DEFUN([AM_PATH_ALSA], 17 [dnl Save the original CFLAGS, LDFLAGS, and LIBS 18 alsa_save_CFLAGS="$CFLAGS" 19 alsa_save_LDFLAGS="$LDFLAGS" 20 alsa_save_LIBS="$LIBS" 21 alsa_found=yes 22 23 dnl 24 dnl Get the cflags and libraries for alsa 25 dnl 26 AC_ARG_WITH(alsa-prefix, 27 [ --with-alsa-prefix=PFX Prefix where Alsa library is installed(optional)], 28 [alsa_prefix="$withval"], [alsa_prefix=""]) 29 30 AC_ARG_WITH(alsa-inc-prefix, 31 [ --with-alsa-inc-prefix=PFX Prefix where include libraries are (optional)], 32 [alsa_inc_prefix="$withval"], [alsa_inc_prefix=""]) 33 34 dnl FIXME: this is not yet implemented 35 AC_ARG_ENABLE(alsatest, 36 [ --disable-alsatest Do not try to compile and run a test Alsa program], 37 [enable_alsatest="$enableval"], 38 [enable_alsatest=yes]) 39 40 dnl Add any special include directories 41 AC_MSG_CHECKING(for ALSA CFLAGS) 42 if test "$alsa_inc_prefix" != "" ; then 43 ALSA_CFLAGS="$ALSA_CFLAGS -I$alsa_inc_prefix" 44 CFLAGS="$CFLAGS -I$alsa_inc_prefix" 45 fi 46 AC_MSG_RESULT($ALSA_CFLAGS) 47 48 dnl add any special lib dirs 49 AC_MSG_CHECKING(for ALSA LDFLAGS) 50 if test "$alsa_prefix" != "" ; then 51 ALSA_LIBS="$ALSA_LIBS -L$alsa_prefix" 52 LDFLAGS="$LDFLAGS $ALSA_LIBS" 53 fi 54 55 dnl add the alsa library 56 ALSA_LIBS="$ALSA_LIBS -lasound -lm -ldl -lpthread" 57 LIBS=`echo $LIBS | sed 's/-lm//'` 58 LIBS=`echo $LIBS | sed 's/-ldl//'` 59 LIBS=`echo $LIBS | sed 's/-lpthread//'` 60 LIBS=`echo $LIBS | sed 's/ //'` 61 LIBS="$ALSA_LIBS $LIBS" 62 AC_MSG_RESULT($ALSA_LIBS) 63 64 dnl Check for a working version of libasound that is of the right version. 65 min_alsa_version=ifelse([$1], ,0.1.1,$1) 66 AC_MSG_CHECKING(for libasound headers version >= $min_alsa_version) 67 no_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 75 AC_LANG_SAVE 76 AC_LANG_C 77 AC_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 110 exit(0); 111 ], 112 [AC_MSG_RESULT(found.)], 113 [AC_MSG_RESULT(not present.) 114 ifelse([$3], , [AC_MSG_ERROR(Sufficiently new version of libasound not found.)]) 115 alsa_found=no] 116 ) 117 AC_LANG_RESTORE 118 119 dnl Now that we know that we have the right version, let's see if we have the library and not just the headers. 120 if test "x$enable_alsatest" = "xyes"; then 121 AC_CHECK_LIB([asound], [snd_ctl_open],, 122 [ifelse([$3], , [AC_MSG_ERROR(No linkable libasound was found.)]) 123 alsa_found=no] 124 ) 125 fi 126 127 if test "x$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 $LIBS" 132 fi 133 if test "x$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="" 140 fi 141 142 dnl That should be it. Now just export out symbols: 143 AC_SUBST(ALSA_CFLAGS) 144 AC_SUBST(ALSA_LIBS) 145 ]) 146
