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    Contents of /trunk/xmms/gentoo-m4/alsa.m4

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    Revision 153 - (show annotations) (download)
    Tue May 8 20:52:56 2007 UTC (17 years ago) by niro
    File size: 4338 byte(s) 
    -import
    1 dnl Configure Paths for Alsa
    2 dnl Some modifications by Richard Boulton <richard-alsa@tartarus.org>
    3 dnl Christopher Lansdown <lansdoct@cs.alfred.edu>
    4 dnl Jaroslav Kysela <perex@suse.cz>
    5 dnl Last modification: alsa.m4,v 1.24 2004/09/15 18:48:07 tiwai Exp
    6 dnl AM_PATH_ALSA([MINIMUM-VERSION [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
    7 dnl Test for libasound, and define ALSA_CFLAGS and ALSA_LIBS as appropriate.
    8 dnl enables arguments --with-alsa-prefix=
    9 dnl --with-alsa-enc-prefix=
    10 dnl --disable-alsatest
    11 dnl
    12 dnl For backwards compatibility, if ACTION_IF_NOT_FOUND is not specified,
    13 dnl and the alsa libraries are not found, a fatal AC_MSG_ERROR() will result.
    14 dnl
    15 AC_DEFUN([AM_PATH_ALSA],
    16 [dnl Save the original CFLAGS, LDFLAGS, and LIBS
    17 alsa_save_CFLAGS="$CFLAGS"
    18 alsa_save_LDFLAGS="$LDFLAGS"
    19 alsa_save_LIBS="$LIBS"
    20 alsa_found=yes
    21
    22 dnl
    23 dnl Get the cflags and libraries for alsa
    24 dnl
    25 AC_ARG_WITH(alsa-prefix,
    26 [ --with-alsa-prefix=PFX Prefix where Alsa library is installed(optional)],
    27 [alsa_prefix="$withval"], [alsa_prefix=""])
    28
    29 AC_ARG_WITH(alsa-inc-prefix,
    30 [ --with-alsa-inc-prefix=PFX Prefix where include libraries are (optional)],
    31 [alsa_inc_prefix="$withval"], [alsa_inc_prefix=""])
    32
    33 dnl FIXME: this is not yet implemented
    34 AC_ARG_ENABLE(alsatest,
    35 [ --disable-alsatest Do not try to compile and run a test Alsa program],
    36 [enable_alsatest="$enableval"],
    37 [enable_alsatest=yes])
    38
    39 dnl Add any special include directories
    40 AC_MSG_CHECKING(for ALSA CFLAGS)
    41 if test "$alsa_inc_prefix" != "" ; then
    42 ALSA_CFLAGS="$ALSA_CFLAGS -I$alsa_inc_prefix"
    43 CFLAGS="$CFLAGS -I$alsa_inc_prefix"
    44 fi
    45 AC_MSG_RESULT($ALSA_CFLAGS)
    46
    47 dnl add any special lib dirs
    48 AC_MSG_CHECKING(for ALSA LDFLAGS)
    49 if test "$alsa_prefix" != "" ; then
    50 ALSA_LIBS="$ALSA_LIBS -L$alsa_prefix"
    51 LDFLAGS="$LDFLAGS $ALSA_LIBS"
    52 fi
    53
    54 dnl add the alsa library
    55 ALSA_LIBS="$ALSA_LIBS -lasound -lm -ldl -lpthread"
    56 LIBS="$ALSA_LIBS $LIBS"
    57 AC_MSG_RESULT($ALSA_LIBS)
    58
    59 dnl Check for a working version of libasound that is of the right version.
    60 min_alsa_version=ifelse([$1], ,0.1.1,$1)
    61 AC_MSG_CHECKING(for libasound headers version >= $min_alsa_version)
    62 no_alsa=""
    63 alsa_min_major_version=`echo $min_alsa_version | \
    64 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
    65 alsa_min_minor_version=`echo $min_alsa_version | \
    66 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
    67 alsa_min_micro_version=`echo $min_alsa_version | \
    68 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
    69
    70 AC_LANG_SAVE
    71 AC_LANG_C
    72 AC_TRY_COMPILE([
    73 #include <alsa/asoundlib.h>
    74 ], [
    75 /* ensure backward compatibility */
    76 #if !defined(SND_LIB_MAJOR) && defined(SOUNDLIB_VERSION_MAJOR)
    77 #define SND_LIB_MAJOR SOUNDLIB_VERSION_MAJOR
    78 #endif
    79 #if !defined(SND_LIB_MINOR) && defined(SOUNDLIB_VERSION_MINOR)
    80 #define SND_LIB_MINOR SOUNDLIB_VERSION_MINOR
    81 #endif
    82 #if !defined(SND_LIB_SUBMINOR) && defined(SOUNDLIB_VERSION_SUBMINOR)
    83 #define SND_LIB_SUBMINOR SOUNDLIB_VERSION_SUBMINOR
    84 #endif
    85
    86 # if(SND_LIB_MAJOR > $alsa_min_major_version)
    87 exit(0);
    88 # else
    89 # if(SND_LIB_MAJOR < $alsa_min_major_version)
    90 # error not present
    91 # endif
    92
    93 # if(SND_LIB_MINOR > $alsa_min_minor_version)
    94 exit(0);
    95 # else
    96 # if(SND_LIB_MINOR < $alsa_min_minor_version)
    97 # error not present
    98 # endif
    99
    100 # if(SND_LIB_SUBMINOR < $alsa_min_micro_version)
    101 # error not present
    102 # endif
    103 # endif
    104 # endif
    105 exit(0);
    106 ],
    107 [AC_MSG_RESULT(found.)],
    108 [AC_MSG_RESULT(not present.)
    109 ifelse([$3], , [AC_MSG_ERROR(Sufficiently new version of libasound not found.)])
    110 alsa_found=no]
    111 )
    112 AC_LANG_RESTORE
    113
    114 dnl Now that we know that we have the right version, let's see if we have the library and not just the headers.
    115 if test "x$enable_alsatest" = "xyes"; then
    116 AC_CHECK_LIB([asound], [snd_ctl_open],,
    117 [ifelse([$3], , [AC_MSG_ERROR(No linkable libasound was found.)])
    118 alsa_found=no]
    119 )
    120 fi
    121
    122 if test "x$alsa_found" = "xyes" ; then
    123 ifelse([$2], , :, [$2])
    124 LIBS=`echo $LIBS | sed 's/-lasound//g'`
    125 LIBS=`echo $LIBS | sed 's/ //'`
    126 LIBS="-lasound $LIBS"
    127 fi
    128 if test "x$alsa_found" = "xno" ; then
    129 ifelse([$3], , :, [$3])
    130 CFLAGS="$alsa_save_CFLAGS"
    131 LDFLAGS="$alsa_save_LDFLAGS"
    132 LIBS="$alsa_save_LIBS"
    133 ALSA_CFLAGS=""
    134 ALSA_LIBS=""
    135 fi
    136
    137 dnl That should be it. Now just export out symbols:
    138 AC_SUBST(ALSA_CFLAGS)
    139 AC_SUBST(ALSA_LIBS)
    140 ])
    141