AC_CHECK_HEADER(pthread.h)
AM_CONDITIONAL(WITH_THREADS, test "x$with_threads" = "xyes")
+dnl Festival related checks
+# defaults to yes
+AC_ARG_WITH(festival, [ --with-festival Use festival speech software [default=no]], [], [with_festival=no])
+if test "x$with_festival" = "xyes"; then
+ AC_DEFINE([USE_FESTIVAL], 1, [Define to enable festival speech software])
+fi
+AM_CONDITIONAL(USE_FESTIVAL, test "x$with_festival" = "xyes")
+
dnl Used by JSBSim to conditionally compile in fgfs interface code
AC_DEFINE([FGFS], 1, [Define so that JSBSim compiles in 'library' mode])
dnl Check for the presence of SimGear
+if test "x$with_simgear" != "x"; then
+AC_CHECK_HEADER($with_simgear/include/simgear/version.h, [ac_cv_header_simgear_version_h=yes], [ac_cv_header_simgear_version_h=no])
+else
AC_CHECK_HEADER(simgear/version.h)
+fi
if test "x$ac_cv_header_simgear_version_h" != "xyes"; then
echo
echo "You *must* have the SimGear support library installed on your system"
LIBS="$saved_LIBS"
dnl Check if SimGear was built with Norman's JPEG factory support
+if test "x$with_simgear" != "x"; then
+AC_CHECK_HEADER($with_simgear/include/simgear/screen/jpgfactory.hxx,[ac_cv_header_simgear_screen_jpgfactory_hxx=yes],[ac_cv_header_simgear_screen_jpgfactory_hxx=no])
+else
AC_CHECK_HEADER(simgear/screen/jpgfactory.hxx)
+fi
if test "x$ac_cv_header_simgear_screen_jpgfactory_hxx" = "xyes"; then
AC_CHECK_LIB(jpeg, jpeg_start_compress)
if test "x$ac_cv_lib_jpeg_jpeg_start_compress" != "xyes" ; then