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dnl Configure Paths for Alsa
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dnl Some modifications by Richard Boulton <richard-alsa@tartarus.org>
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dnl Christopher Lansdown <lansdoct@cs.alfred.edu>
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dnl Jaroslav Kysela <perex@suse.cz>
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dnl Last modification: alsa.m4,v 1.24 2004/09/15 18:48:07 tiwai Exp
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dnl AM_PATH_ALSA([MINIMUM-VERSION [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
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dnl Test for libasound, and define ALSA_CFLAGS and ALSA_LIBS as appropriate.
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dnl enables arguments --with-alsa-prefix=
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dnl --with-alsa-enc-prefix=
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dnl --disable-alsatest
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dnl For backwards compatibility, if ACTION_IF_NOT_FOUND is not specified,
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dnl and the alsa libraries are not found, a fatal AC_MSG_ERROR() will result.
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AC_DEFUN([AM_PATH_ALSA],
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[dnl Save the original CFLAGS, LDFLAGS, and LIBS
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alsa_save_CFLAGS="$CFLAGS"
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alsa_save_LDFLAGS="$LDFLAGS"
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alsa_save_LIBS="$LIBS"
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dnl Get the cflags and libraries for alsa
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AC_ARG_WITH(alsa-prefix,
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[ --with-alsa-prefix=PFX Prefix where Alsa library is installed(optional)],
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[alsa_prefix="$withval"], [alsa_prefix=""])
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AC_ARG_WITH(alsa-inc-prefix,
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[ --with-alsa-inc-prefix=PFX Prefix where include libraries are (optional)],
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[alsa_inc_prefix="$withval"], [alsa_inc_prefix=""])
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dnl FIXME: this is not yet implemented
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AC_ARG_ENABLE(alsatest,
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[ --disable-alsatest Do not try to compile and run a test Alsa program],
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[enable_alsatest="$enableval"],
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[enable_alsatest=yes])
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dnl Add any special include directories
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AC_MSG_CHECKING(for ALSA CFLAGS)
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if test "$alsa_inc_prefix" != "" ; then
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ALSA_CFLAGS="$ALSA_CFLAGS -I$alsa_inc_prefix"
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CFLAGS="$CFLAGS -I$alsa_inc_prefix"
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AC_MSG_RESULT($ALSA_CFLAGS)
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CFLAGS="$alsa_save_CFLAGS"
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dnl add any special lib dirs
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AC_MSG_CHECKING(for ALSA LDFLAGS)
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if test "$alsa_prefix" != "" ; then
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ALSA_LIBS="$ALSA_LIBS -L$alsa_prefix"
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LDFLAGS="$LDFLAGS $ALSA_LIBS"
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dnl add the alsa library
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ALSA_LIBS="$ALSA_LIBS -lasound -lm -ldl -lpthread"
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LIBS="$ALSA_LIBS $LIBS"
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AC_MSG_RESULT($ALSA_LIBS)
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dnl Check for a working version of libasound that is of the right version.
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min_alsa_version=ifelse([$1], ,0.1.1,$1)
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AC_MSG_CHECKING(for libasound headers version >= $min_alsa_version)
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alsa_min_major_version=`echo $min_alsa_version | \
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sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
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alsa_min_minor_version=`echo $min_alsa_version | \
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sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
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alsa_min_micro_version=`echo $min_alsa_version | \
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sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
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#include <alsa/asoundlib.h>
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/* ensure backward compatibility */
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#if !defined(SND_LIB_MAJOR) && defined(SOUNDLIB_VERSION_MAJOR)
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#define SND_LIB_MAJOR SOUNDLIB_VERSION_MAJOR
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#if !defined(SND_LIB_MINOR) && defined(SOUNDLIB_VERSION_MINOR)
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#define SND_LIB_MINOR SOUNDLIB_VERSION_MINOR
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#if !defined(SND_LIB_SUBMINOR) && defined(SOUNDLIB_VERSION_SUBMINOR)
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#define SND_LIB_SUBMINOR SOUNDLIB_VERSION_SUBMINOR
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# if(SND_LIB_MAJOR > $alsa_min_major_version)
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# if(SND_LIB_MAJOR < $alsa_min_major_version)
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# if(SND_LIB_MINOR > $alsa_min_minor_version)
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# if(SND_LIB_MINOR < $alsa_min_minor_version)
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# if(SND_LIB_SUBMINOR < $alsa_min_micro_version)
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[AC_MSG_RESULT(found.)],
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[AC_MSG_RESULT(not present.)
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ifelse([$3], , [AC_MSG_ERROR(Sufficiently new version of libasound not found.)])
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dnl Now that we know that we have the right version, let's see if we have the library and not just the headers.
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if test "x$enable_alsatest" = "xyes"; then
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AC_CHECK_LIB([asound], [snd_ctl_open],,
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[ifelse([$3], , [AC_MSG_ERROR(No linkable libasound was found.)])
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LDFLAGS="$alsa_save_LDFLAGS"
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LIBS="$alsa_save_LIBS"
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if test "x$alsa_found" = "xyes" ; then
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ifelse([$2], , :, [$2])
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ifelse([$3], , :, [$3])
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dnl That should be it. Now just export out symbols:
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AC_SUBST(ALSA_CFLAGS)
added
removed
m4macros/alsa.m4
