+dnl #
+dnl # 4. determine a few additional details
+dnl #
+
+if test "x$with_context" = "xucontext" ; then
+dnl # direction of stack grow
+ AC_CHECK_STACKGROWTH(PTH_STACKGROWTH)
+ if test ".$ac_cv_check_stackgrowth" = ".down"; then
+ PTH_STACK_GROWTH="down"
+ else
+ PTH_STACK_GROWTH="up"
+ fi
+ AC_SUBST(PTH_STACK_GROWTH)
+
+ AC_CHECK_STACKSETUP(makecontext, pth_skaddr_makecontext, pth_sksize_makecontext)
+fi
+
+
+#########################################
+## Build optional modules (simix)
+##
+SG_CONFIGURE_PART(Optional modules)
+AC_ARG_ENABLE(simix,
+ AS_HELP_STRING([--enable-simix], [Use the new SimIX module (default=no)]),
+ enable_simix=$enableval,enable_simix=no)
+if test "x$enable_simix" = "xyes" ; then
+ AC_MSG_RESULT("***** You have decided to use the experimental SimIX. We hope you know what you're doing.. ****")
+ AC_DEFINE(USE_SIMIX, 1, [Indicates whether we should use SimIX or not])
+else
+ AC_MSG_RESULT(Eventually you will come to SimIX: x$enable_simix)
+fi
+AM_CONDITIONAL(USE_SIMIX,test x$enable_simix != xno)
+
+#########################################
+## Check for libraries extra-dependencies
+##
+
+SG_CONFIGURE_PART(Checking extra libraries dependencies...)
+
+AC_MSG_CHECKING(for csdp)
+SIMGRID_DEP=""
+sdp=no
+AC_CHECK_LIB(sdp,sdp,csdp=yes, csdp=no,-llapack -lblas -lm)
+if test "x$csdp" = xyes; then
+ SIMGRID_DEP="$SIMGRID_DEP -lsdp -llapack -lblas -lm"
+ AC_MSG_RESULT(Found working sdp library.)
+ AC_DEFINE(HAVE_SDP, 1, [Indicates whether we have the CSDP library or not])
+else
+ AC_MSG_RESULT(Could not find any working sdp library.)
+fi;
+AM_CONDITIONAL(HAVE_SDP,test x$csdp != xno)
+
+AC_SUBST([SIMGRID_DEP])