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Don't add -lasound etc to LIBS if ALSA turns out not to be installed.

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Original commit message from CVS:
Don't add -lasound etc to LIBS if ALSA turns out not to be installed.
This commit is contained in:
Richard Boulton 2001-01-07 14:16:16 +00:00
parent 17b138b101
commit de346e1126
1 changed files with 17 additions and 32 deletions
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49
acinclude.m4
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@ -1,6 +1,7 @@
dnl Configure Paths for Alsa
dnl Christopher Lansdown (lansdoct@cs.alfred.edu)
dnl 29/10/1998
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 Test for libasound, and define ALSA_CFLAGS and ALSA_LIBS as appropriate.
dnl enables arguments --with-alsa-prefix= --with-alsa-enc-prefix= --disable-alsatest
@ -9,17 +10,17 @@ AC_DEFUN(AM_PATH_ALSA,
[dnl
dnl Get the clfags and libraries for alsa
dnl
AC_ARG_WITH(alsa-prefix,[ --with-alsa-prefix=PFX Prefix where Alsa library is installed(optional)],
AC_ARG_WITH(alsa-prefix,[ --with-alsa-prefix=PFX Prefix where Alsa library is installed(optional)],
[alsa_prefix="$withval"], [alsa_prefix=""])
AC_ARG_WITH(alsa-inc-prefix, [ --with-alsa-inc-prefix=PFX Prefix where include libraries are (optional)],
AC_ARG_WITH(alsa-inc-prefix, [ --with-alsa-inc-prefix=PFX Prefix where include libraries are (optional)],
[alsa_inc_prefix="$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])
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)
if test "$alsa_inc_prefix" != "" ; then
ALSA_CFLAGS="$ALSA_CFLAGS -I$alsa_inc_prefix"
CFLAGS="-I$alsa_inc_prefix"
CFLAGS="$CFLAGS -I$alsa_inc_prefix"
fi
AC_MSG_RESULT($ALSA_CFLAGS)
@ -27,33 +28,15 @@ dnl add any special lib dirs
AC_MSG_CHECKING(for ALSA LDFLAGS)
if test "$alsa_prefix" != "" ; then
ALSA_LIBS="$ALSA_LIBS -L$alsa_prefix"
LIBS="-L$alsa_prefix"
LDFLAGS="$LDFLAGS -L$alsa_prefix"
fi
dnl add the alsa library
ALSA_LIBS="$ALSA_LIBS -lasound"
LDFLAGS="$ALSA_LIBS -lasound"
ALSA_LIBS="$ALSA_LIBS -lasound -lm -ldl"
alsa_save_LIBS="$LIBS"
LIBS="$LIBS -lasound -lm -ldl"
AC_MSG_RESULT($ALSA_LIBS)
dnl Check for the presence of the library
dnl if test $enable_alsatest = yes; then
dnl AC_MSG_CHECKING(for working libasound)
dnl AC_TRY_RUN([
dnl #include <sys/asoundlib.h>
dnl void main(void)
dnl {
dnl snd_cards();
dnl exit(0);
dnl }
dnl ],
dnl [AC_MSG_RESULT("present")],
dnl [AC_MSG_RESULT("not found. ")
dnl AC_MSG_ERROR(Fatal error: Install alsa-lib package or use --with-alsa-prefix option...)],
dnl [AC_MSG_RESULT(unsopported)
dnl AC_MSG_ERROR(Cross-compiling isn't supported...)]
dnl )
dnl fi
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 >= $min_alsa_version)
@ -107,13 +90,16 @@ exit(0);
],
[AC_MSG_RESULT(found.)],
[AC_MSG_RESULT(not present.)
AC_MSG_WARN(Sufficiently new version of libasound not found.)]
AC_MSG_WARN(Sufficiently new version of libasound not found.)
LIBS="$alsa_save_LIBS"
]
)
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_cards],,
[AC_MSG_WARN(No linkable libasound was found.)]
AC_CHECK_LIB([asound], [snd_defaults_card],,
[AC_MSG_WARN(No linkable libasound was found.)
LIBS="$alsa_save_LIBS"]
)
dnl That should be it. Now just export out symbols:
@ -121,4 +107,3 @@ AC_SUBST(ALSA_CFLAGS)
AC_SUBST(ALSA_LIBS)
])