diff options
Diffstat (limited to 'm4/gst-alsa.m4')
| -rw-r--r-- | m4/gst-alsa.m4 | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/m4/gst-alsa.m4 b/m4/gst-alsa.m4 new file mode 100644 index 0000000..4141d06 --- /dev/null +++ b/m4/gst-alsa.m4 @@ -0,0 +1,150 @@ +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-enc-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="$LIBS" +alsa_found=yes + +dnl +dnl Get the cflags and libraries for alsa +dnl +AC_ARG_WITH(alsa-prefix, + AC_HELP_STRING([--with-alsa-prefix=PFX], + [prefix where Alsa library is installed(optional)]), + [alsa_prefix="$withval"], [alsa_prefix=""]) + +AC_ARG_WITH(alsa-inc-prefix, + AC_HELP_STRING([--with-alsa-inc-prefix=PFX], + [prefix where include libraries are (optional)]), + [alsa_inc_prefix="$withval"], [alsa_inc_prefix=""]) + +dnl FIXME: this is not yet implemented +dnl AC_ARG_ENABLE(alsatest, +dnl AC_HELP_STRING([--disable-alsatest], +dnl [do not try to compile and run a test Alsa program], +dnl [enable_alsatest=no], [enable_alsatest=yes]) + +dnl Add any special include directories +AC_MSG_CHECKING(for ALSA CFLAGS) +if test "$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_SAVE +AC_LANG_C +AC_TRY_COMPILE([ +#include <alsa/asoundlib.h> +], [ +void main(void) +{ +/* 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([$3], , [AC_MSG_ERROR(Sufficiently new version of libasound not found.)]) + alsa_found=no] +) +AC_LANG_RESTORE + +dnl Now that we know that we have the right version, let's see if we have the library and not just the headers. +if test "x$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) +]) + |