dnl Configure Paths for Alsadnl Some modifications by Richard Boulton <richard-alsa@tartarus.org>dnl Christopher Lansdown <lansdoct@cs.alfred.edu>dnl Jaroslav Kysela <perex@suse.cz>dnl Modified for TiMidity++ by URABE, Shyouhei <root@mput.dip.jp>dnl Original    : alsa.m4,v 1.22 2002/05/27 11:14:20 tiwai Expdnl This version: alsa.m4,       2002/10/08 22:30:18 JSTdnl AM_PATH_ALSA([MINIMUM-VERSION [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])dnl Test for libasound, and define ALSA_CFLAGS and ALSA_LIBS as appropriate.dnl enables arguments --with-alsa-prefix=dnl                   --with-alsa-enc-prefix=dnl                   --disable-alsatest  (this has no effect, as yet)dnldnl For backwards compatibility, if ACTION_IF_NOT_FOUND is not specified,dnl and the alsa libraries are not found, a fatal AC_MSG_ERROR() will result.dnlAC_DEFUN(AM_PATH_ALSA,[dnl Save the original CFLAGS, LDFLAGS, and LIBSalsa_save_CFLAGS="$CFLAGS"alsa_save_LDFLAGS="$LDFLAGS"alsa_save_LIBS="$LIBS"alsa_found=yesdnldnl Get the cflags and libraries for alsadnlAC_ARG_WITH(alsa-prefix,[  --with-alsa-prefix=PFX  Prefix where Alsa library is installed(optional)],[alsa_prefix="$withval"], [alsa_prefix=""])AC_ARG_WITH(alsa-inc-prefix,[  --with-alsa-inc-prefix=PFX  Prefix where include libraries are (optional)],[alsa_inc_prefix="$withval"], [alsa_inc_prefix=""])dnl FIXME: this is not yet implementedAC_ARG_ENABLE(alsatest,[  --disable-alsatest      Do not try to compile and run a test Alsa program],[enable_alsatest=no],[enable_alsatest=yes])dnl Add any special include directoriesAC_MSG_CHECKING(for ALSA CFLAGS)if test "$alsa_inc_prefix" != "" ; then	ALSA_CFLAGS="$ALSA_CFLAGS -I$alsa_inc_prefix"	CFLAGS="$CFLAGS -I$alsa_inc_prefix"fiAC_MSG_RESULT($ALSA_CFLAGS)dnl add any special lib dirsAC_MSG_CHECKING(for ALSA LDFLAGS)if test "$alsa_prefix" != "" ; then	ALSA_LIBS="$ALSA_LIBS -L$alsa_prefix"	LDFLAGS="$LDFLAGS $ALSA_LIBS"fidnl add the alsa libraryALSA_LIBS="$ALSA_LIBS -lasound -lm -ldl -lpthread"LIBS=`echo $LIBS | sed 's/-lm//'`LIBS=`echo $LIBS | sed 's/-ldl//'`LIBS=`echo $LIBS | sed 's/-lpthread//'`LIBS=`echo $LIBS | sed 's/  //'`LIBS="$ALSA_LIBS $LIBS"AC_MSG_RESULT($ALSA_LIBS)dnl Check for a working version of libasound that is of the right version.min_alsa_version=ifelse([$1], ,0.1.1,$1)AC_MSG_CHECKING(for libasound headers version >= $min_alsa_version)no_alsa=""    alsa_min_major_version=`echo $min_alsa_version | \           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`    alsa_min_minor_version=`echo $min_alsa_version | \           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`    alsa_min_micro_version=`echo $min_alsa_version | \           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`dnl This is the test program.AC_DEFUN([MPUT_ALSA_TRY],[/* ensure backward compatibility */#if !defined(SND_LIB_MAJOR) && defined(SOUNDLIB_VERSION_MAJOR)#define SND_LIB_MAJOR SOUNDLIB_VERSION_MAJOR#endif#if !defined(SND_LIB_MINOR) && defined(SOUNDLIB_VERSION_MINOR)#define SND_LIB_MINOR SOUNDLIB_VERSION_MINOR#endif#if !defined(SND_LIB_SUBMINOR) && defined(SOUNDLIB_VERSION_SUBMINOR)#define SND_LIB_SUBMINOR SOUNDLIB_VERSION_SUBMINOR#endif#  if(SND_LIB_MAJOR > $alsa_min_major_version)  exit(0);#  else#    if(SND_LIB_MAJOR < $alsa_min_major_version)#       error not present#    endif#   if(SND_LIB_MINOR > $alsa_min_minor_version)  exit(0);#   else#     if(SND_LIB_MINOR < $alsa_min_minor_version)#          error not present#      endif#      if(SND_LIB_SUBMINOR < $alsa_min_micro_version)#        error not present#      endif#    endif#  endifexit(0);])dnl macro MPUT_ALSA_TRYAC_LANG_SAVEAC_LANG_CAC_TRY_COMPILE([#include <alsa/asoundlib.h>],  MPUT_ALSA_TRY(),  [AC_MSG_RESULT(found.)],  [AC_TRY_COMPILE([#include <sys/asoundlib.h>],   MPUT_ALSA_TRY(),  [AC_MSG_RESULT(found.)],  [AC_MSG_RESULT(not present.)   ifelse([$3], ,[AC_MSG_RESULT(libasound was not found anywhere.)])   alsa_found=no])   ifelse([$3], ,[AC_MSG_RESULT(Sufficiently new version of libasound not found.)])])AC_LANG_RESTOREdnl Now that we know we have the right version, why not see if wednl have the library and not just the headers.AC_CHECK_LIB([asound],[snd_ctl_open], ,  [ifelse([$3], ,[AC_MSG_RESULT(No linkable libasound was found.)])   alsa_found=no])if test "x$alsa_found" = "xyes" ; then   ifelse([$2], , :, [$2])   LIBS=`echo $LIBS | sed 's/-lasound//g'`   LIBS=`echo $LIBS | sed 's/  //'`   LIBS="-lasound $LIBS"else   ifelse([$3], , :, [$3])   CFLAGS="$alsa_save_CFLAGS"   LDFLAGS="$alsa_save_LDFLAGS"   LIBS="$alsa_save_LIBS"   ALSA_CFLAGS=""   ALSA_LIBS=""fidnl That should be it.  Now just export out symbols:AC_SUBST(ALSA_CFLAGS)AC_SUBST(ALSA_LIBS)])