| dnl Configure Paths for Alsa |
| dnl Some modifications by Richard Boulton <richard-alsa@tartarus.org> |
| dnl Christopher Lansdown <lansdoct@cs.alfred.edu> |
| dnl Jaroslav Kysela <perex@suse.cz> |
| dnl Last modification: alsa.m4,v 1.23 2004/01/16 18:14:22 tiwai Exp |
| dnl 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-inc-prefix= |
| dnl --disable-alsatest |
| dnl |
| dnl 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. |
| dnl |
| |
| AC_DEFUN([AM_PATH_ALSA], |
| [dnl Save the original CFLAGS, LDFLAGS, and LIBS |
| alsa_save_CFLAGS="$CFLAGS" |
| alsa_save_LDFLAGS="$LDFLAGS" |
| alsa_save_LIBS="$LIBS" |
| alsa_found=yes |
| |
| dnl |
| dnl Get the cflags and libraries for alsa |
| dnl |
| AC_ARG_WITH(alsa-prefix, |
| [ --with-alsa-prefix=PFX Prefix where Alsa library is installed(optional)], |
| [alsa_prefix="$withval"], [alsa_prefix=""]) |
| |
| AC_ARG_WITH(alsa-inc-prefix, |
| [ --with-alsa-inc-prefix=PFX Prefix where include libraries are (optional)], |
| [alsa_inc_prefix="$withval"], [alsa_inc_prefix=""]) |
| |
| dnl FIXME: this is not yet implemented |
| AC_ARG_ENABLE(alsatest, |
| [ --disable-alsatest Do not try to compile and run a test Alsa program], |
| [enable_alsatest="$enableval"], |
| [enable_alsatest=yes]) |
| |
| dnl Add any special include directories |
| AC_MSG_CHECKING(for ALSA CFLAGS) |
| if test "$alsa_inc_prefix" != "" ; then |
| ALSA_CFLAGS="$ALSA_CFLAGS -I$alsa_inc_prefix" |
| CFLAGS="$CFLAGS -I$alsa_inc_prefix" |
| fi |
| AC_MSG_RESULT($ALSA_CFLAGS) |
| |
| dnl add any special lib dirs |
| AC_MSG_CHECKING(for ALSA LDFLAGS) |
| if test "$alsa_prefix" != "" ; then |
| ALSA_LIBS="$ALSA_LIBS -L$alsa_prefix" |
| LDFLAGS="$LDFLAGS $ALSA_LIBS" |
| fi |
| |
| dnl add the alsa library |
| ALSA_LIBS="$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/'` |
| |
| AC_LANG_PUSH([C]) |
| AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ |
| #include <alsa/asoundlib.h> |
| ]], [[ |
| /* 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 |
| # endif |
| exit(0); |
| ]])], |
| [AC_MSG_RESULT(found.)], |
| [AC_MSG_RESULT(not present.) |
| ifelse([$3], , [AC_MSG_ERROR(Sufficiently new version of libasound not found.)]) |
| alsa_found=no] |
| ) |
| AC_LANG_POP([C]) |
| |
| dnl Now that we know that we have the right version, let's see if we have the library and not just the headers. |
| if test "x$enable_alsatest" = "xyes"; then |
| AC_CHECK_LIB([asound], [snd_ctl_open],, |
| [ifelse([$3], , [AC_MSG_ERROR(No linkable libasound was found.)]) |
| alsa_found=no] |
| ) |
| fi |
| |
| if test "x$alsa_found" = "xyes" ; then |
| ifelse([$2], , :, [$2]) |
| LIBS=`echo $LIBS | sed 's/-lasound//g'` |
| LIBS=`echo $LIBS | sed 's/ //'` |
| LIBS="-lasound $LIBS" |
| fi |
| if test "x$alsa_found" = "xno" ; then |
| ifelse([$3], , :, [$3]) |
| CFLAGS="$alsa_save_CFLAGS" |
| LDFLAGS="$alsa_save_LDFLAGS" |
| LIBS="$alsa_save_LIBS" |
| ALSA_CFLAGS="" |
| ALSA_LIBS="" |
| fi |
| |
| dnl That should be it. Now just export out symbols: |
| AC_SUBST(ALSA_CFLAGS) |
| AC_SUBST(ALSA_LIBS) |
| ]) |