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123 lines
3.7 KiB
Text
123 lines
3.7 KiB
Text
dnl Configure Paths for Alsa
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dnl Christopher Lansdown (lansdoct@cs.alfred.edu)
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dnl 29/10/1998
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dnl AM_PATH_ALSA(MINIMUM-VERSION)
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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= --with-alsa-enc-prefix= --disable-alsatest
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dnl
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AC_DEFUN(AM_PATH_ALSA,
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[dnl
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dnl Get the clfags and libraries for alsa
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dnl
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AC_ARG_WITH(alsa-prefix,[ --with-alsa-prefix=PFX Prefix where Alsa library is installed(optional)],
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[alsa_prefix="$withval"], [alsa_prefix=""])
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AC_ARG_WITH(alsa-inc-prefix, [ --with-alsa-inc-prefix=PFX Prefix where include libraries are (optional)],
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[alsa_inc_prefix="$withval"], [alsa_inc_prefix=""])
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AC_ARG_ENABLE(alsatest, [ --disable-alsatest Do not try to compile and run a test Alsa program], [enable_alsatest=no], [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$alsa_inc_prefix"
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fi
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AC_MSG_RESULT($ALSA_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 -L$alsa_prefix"
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fi
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dnl add the alsa library
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ALSA_LIBS="$ALSA_LIBS -lasound -lm"
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LIBS="$LIBS -lasound -lm"
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AC_MSG_RESULT($ALSA_LIBS)
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dnl Check for the presence of the library
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dnl if test $enable_alsatest = yes; then
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dnl AC_MSG_CHECKING(for working libasound)
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dnl AC_TRY_RUN([
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dnl #include <sys/asoundlib.h>
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dnl void main(void)
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dnl {
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dnl snd_cards();
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dnl exit(0);
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dnl }
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dnl ],
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dnl [AC_MSG_RESULT("present")],
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dnl [AC_MSG_RESULT("not found. ")
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dnl AC_MSG_ERROR(Fatal error: Install alsa-lib package or use --with-alsa-prefix option...)],
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dnl [AC_MSG_RESULT(unsopported)
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dnl AC_MSG_ERROR(Cross-compiling isn't supported...)]
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dnl )
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dnl fi
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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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no_alsa=""
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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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AC_LANG_SAVE
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AC_LANG_C
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AC_TRY_COMPILE([
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#include <sys/asoundlib.h>
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], [
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void main(void)
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{
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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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#endif
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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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#endif
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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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#endif
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# if(SND_LIB_MAJOR > $alsa_min_major_version)
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exit(0);
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# else
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# if(SND_LIB_MAJOR < $alsa_min_major_version)
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# error not present
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# endif
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# if(SND_LIB_MINOR > $alsa_min_minor_version)
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exit(0);
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# else
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# if(SND_LIB_MINOR < $alsa_min_minor_version)
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# error not present
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# endif
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# if(SND_LIB_SUBMINOR < $alsa_min_micro_version)
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# error not present
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# endif
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# endif
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# endif
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exit(0);
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}
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],
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[AC_MSG_RESULT(found.)],
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[AC_MSG_RESULT(not present.)
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AC_MSG_ERROR(Sufficiently new version of libasound not found.)]
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)
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AC_LANG_RESTORE
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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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AC_CHECK_LIB([asound], [snd_cards],,
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[AC_MSG_ERROR(No linkable libasound was found.)]
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)
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dnl That should be it. Now just export out symbols:
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AC_SUBST(ALSA_CFLAGS)
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AC_SUBST(ALSA_LIBS)
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])
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