adding libdv m4 check

Original commit message from CVS:
adding libdv m4 check
parent fcd2e7c7
# Configure paths for libdv
# copied from vorbis.m4 by Thomas
# checks for libdv 0.9.5 since that added an extra argument to _init
# Shamelessly stolen from Owen Taylor and Manish Singh
dnl AM_PATH_LIBDV([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
dnl Test for liblibdv, and define LIBDV_CFLAGS and LIBDV_LIBS
dnl
AC_DEFUN(AM_PATH_LIBDV,
[dnl
dnl Get the cflags and libraries
AC_ARG_WITH(libdv,[ --with-libdv=PFX Prefix where libdv is installed (optional)], libdv_prefix="$withval", libdv_prefix="")
AC_ARG_WITH(libdv-libraries,[ --with-libdv-libraries=DIR Directory where libdv library is installed (optional)], libdv_libraries="$withval", libdv_libraries="")
AC_ARG_WITH(libdv-includes,[ --with-libdv-includes=DIR Directory where libdv header files are installed (optional)], libdv_includes="$withval", libdv_includes="")
AC_ARG_ENABLE(libdvtest, [ --disable-libdvtest Do not try to compile and run a test libdv program],, enable_libdvtest=yes)
if test "x$libdv_libraries" != "x" ; then
LIBDV_LIBS="-L$libdv_libraries"
elif test "x$libdv_prefix" != "x" ; then
LIBDV_LIBS="-L$libdv_prefix/lib"
elif test "x$prefix" != "xNONE"; then
LIBDV_LIBS="-L$prefix/lib"
fi
LIBDV_LIBS="$LIBDV_LIBS -ldv"
if test "x$libdv_includes" != "x" ; then
LIBDV_CFLAGS="-I$libdv_includes"
elif test "x$libdv_prefix" != "x" ; then
LIBDV_CFLAGS="-I$libdv_prefix/include"
elif test "x$prefix" != "xNONE"; then
LIBDV_CFLAGS="-I$prefix/include"
fi
AC_MSG_CHECKING(for libdv)
no_libdv=""
if test "x$enable_libdvtest" = "xyes" ; then
ac_save_CFLAGS="$CFLAGS"
ac_save_LIBS="$LIBS"
CFLAGS="$CFLAGS $LIBDV_CFLAGS"
LIBS="$LIBS $LIBDV_LIBS"
dnl
dnl Now check if the installed libdv is sufficiently new.
dnl
dnl rm -f conf.libdvtest
AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libdv/dv.h>
int main ()
{
dv_decoder_new (0, 0, 0);
return 0;
}
],, no_libdv=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
CFLAGS="$ac_save_CFLAGS"
LIBS="$ac_save_LIBS"
fi
if test "x$no_libdv" = "x" ; then
AC_MSG_RESULT(yes)
ifelse([$1], , :, [$1])
else
AC_MSG_RESULT(no)
if test -f conf.libdvtest ; then
:
else
echo "*** Could not run libdv test program, checking why..."
CFLAGS="$CFLAGS $LIBDV_CFLAGS"
LIBS="$LIBS $LIBDV_LIBS"
AC_TRY_LINK([
#include <stdio.h>
#include <libdv/dv.h>
], [ return 0; ],
[ echo "*** The test program compiled, but did not run. This usually means"
echo "*** that the run-time linker is not finding libdv or finding the wrong"
echo "*** version of libdv. If it is not finding libdv, you'll need to set your"
echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
echo "*** to the installed location Also, make sure you have run ldconfig if that"
echo "*** is required on your system"
echo "***"
echo "*** If you have an old version installed, it is best to remove it, although"
echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
[ echo "*** The test program failed to compile or link. See the file config.log for the"
echo "*** exact error that occured. This usually means libdv was incorrectly installed"
echo "*** or that you have moved libdv since it was installed." ])
CFLAGS="$ac_save_CFLAGS"
LIBS="$ac_save_LIBS"
fi
LIBDV_CFLAGS=""
LIBDV_LIBS=""
LIBDVFILE_LIBS=""
LIBDVENC_LIBS=""
ifelse([$2], , :, [$2])
fi
AC_SUBST(LIBDV_CFLAGS)
AC_SUBST(LIBDV_LIBS)
AC_SUBST(LIBDVFILE_LIBS)
AC_SUBST(LIBDVENC_LIBS)
dnl rm -f conf.libdvtest
])
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