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New macro for testing for ALSA libraries.

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Original commit message from CVS:
New macro for testing for ALSA libraries.
Understands the ACTION_IF_FOUND and ACTION_IF_NOT_FOUND arguments.
This commit is contained in:
Richard Boulton 2001-01-07 15:25:11 +00:00
parent e89f87b6b4
commit 8edf6e1433
1 changed files with 45 additions and 17 deletions
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62
acinclude.m4
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@ -1,20 +1,40 @@
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: 07/12/2000
dnl AM_PATH_ALSA(MINIMUM-VERSION)
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= --with-alsa-enc-prefix= --disable-alsatest
dnl enables arguments --with-alsa-prefix=
dnl --with-alsa-enc-prefix=
dnl --disable-alsatest (this has no effect, as yet)
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
dnl Get the clfags and libraries for alsa
[dnl Save the original CFLAGS, LDFLAGS, and LIBS
alsa_save_CFLAGS="$CFLAGS"
alsa_save_LDFLAGS="$LDFLAGS"
alsa_save_LIBS="$LIBS"
alsa_found=yes
dnl
AC_ARG_WITH(alsa-prefix,[ --with-alsa-prefix=PFX Prefix where Alsa library is installed(optional)],
[alsa_prefix="$withval"], [alsa_prefix=""])
AC_ARG_WITH(alsa-inc-prefix, [ --with-alsa-inc-prefix=PFX Prefix where include libraries are (optional)],
[alsa_inc_prefix="$withval"], [alsa_inc_prefix=""])
AC_ARG_ENABLE(alsatest, [ --disable-alsatest Do not try to compile and run a test Alsa program], [enable_alsatest=no], [enable_alsatest=yes])
dnl Get the cflags and libraries for alsa
dnl
AC_ARG_WITH(alsa-prefix,
[ --with-alsa-prefix=PFX Prefix where Alsa library is installed(optional)],
[alsa_prefix="$withval"], [alsa_prefix=""])
AC_ARG_WITH(alsa-inc-prefix,
[ --with-alsa-inc-prefix=PFX Prefix where include libraries are (optional)],
[alsa_inc_prefix="$withval"], [alsa_inc_prefix=""])
dnl FIXME: this is not yet implemented
AC_ARG_ENABLE(alsatest,
[ --disable-alsatest Do not try to compile and run a test Alsa program],
[enable_alsatest=no],
[enable_alsatest=yes])
dnl Add any special include directories
AC_MSG_CHECKING(for ALSA CFLAGS)
@ -28,13 +48,12 @@ dnl add any special lib dirs
AC_MSG_CHECKING(for ALSA LDFLAGS)
if test "$alsa_prefix" != "" ; then
ALSA_LIBS="$ALSA_LIBS -L$alsa_prefix"
LDFLAGS="$LDFLAGS -L$alsa_prefix"
LDFLAGS="$LDFLAGS $ALSA_LIBS"
fi
dnl add the alsa library
ALSA_LIBS="$ALSA_LIBS -lasound -lm -ldl"
alsa_save_LIBS="$LIBS"
LIBS="$LIBS -lasound -lm -ldl"
LIBS="$ALSA_LIBS $LIBS"
AC_MSG_RESULT($ALSA_LIBS)
dnl Check for a working version of libasound that is of the right version.
@ -90,18 +109,27 @@ exit(0);
],
[AC_MSG_RESULT(found.)],
[AC_MSG_RESULT(not present.)
AC_MSG_WARN(Sufficiently new version of libasound not found.)
LIBS="$alsa_save_LIBS"
]
ifelse([$3], , [AC_MSG_ERROR(Sufficiently new version of libasound not found.)])
alsa_found=no]
)
AC_LANG_RESTORE
dnl Now that we know that we have the right version, let's see if we have the library and not just the headers.
AC_CHECK_LIB([asound], [snd_defaults_card],,
[AC_MSG_WARN(No linkable libasound was found.)
LIBS="$alsa_save_LIBS"]
[ifelse([$3], , [AC_MSG_ERROR(No linkable libasound was found.)])
alsa_found=no]
)
if test "x$alsa_found" = "xyes" ; then
ifelse([$2], , :, [$2])
fi
if test "x$alsa_found" = "xno" ; then
ifelse([$3], , :, [$3])
CFLAGS="$alsa_save_CFLAGS"
LDFLAGS="$alsa_save_LDFLAGS"
LIBS="$alsa_save_LIBS"
fi
dnl That should be it. Now just export out symbols:
AC_SUBST(ALSA_CFLAGS)
AC_SUBST(ALSA_LIBS)