mkvtoolnix/ac/dvdread.m4

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dnl
dnl Check for dvdread
dnl
AC_ARG_WITH([dvdread], AC_HELP_STRING([--without-dvdread], [do not build with libdvdread for reading chapters from DVDs]),
[ with_dvdread=${withval} ], [ with_dvdread=yes ])
if test "x$with_dvdread" != "xno"; then
PKG_CHECK_EXISTS([dvdread],[dvdread_found=yes],[dvdread_found=no])
if test x"$dvdread_found" = xyes; then
PKG_CHECK_MODULES([dvdread],[dvdread],[dvdread_found=yes])
DVDREAD_CFLAGS="`$PKG_CONFIG --cflags dvdread`"
DVDREAD_LIBS="`$PKG_CONFIG --libs dvdread`"
fi
fi
if test x"$dvdread_found" = xyes; then
AC_DEFINE(HAVE_DVDREAD,,[define if building with dvdread])
USE_DVDREAD=yes
opt_features_yes="$opt_features_yes\n * DVD chapter support via libdvdread"
else
opt_features_no="$opt_features_no\n * DVD chapter support via libdvdread"
fi
AC_SUBST(DVDREAD_CFLAGS)
AC_SUBST(DVDREAD_LIBS)
AC_SUBST(USE_DVDREAD)