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

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    Revision 153 - (hide annotations) (download)
    Tue May 8 20:52:56 2007 UTC (17 years, 1 month ago) by niro
    File size: 4338 byte(s) 
    -import
    1 niro 153 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