AC_MSG_CHECKING([for external module build support])
# Support XEN
XEN_INCLUDES=
-LB_LINUX_CONFIG([XEN],[XEN_INCLUDES='-I$LINUX/arch/x86/include/mach-xen'],[])
+LB_LINUX_CONFIG([XEN],[XEN_INCLUDES="-I$LINUX/arch/x86/include/mach-xen"],[])
LB_LINUX_CONFIG_VALUE([XEN_INTERFACE_VERSION],[XEN_INCLUDES="$XEN_INCLUDES -D__XEN_INTERFACE_VERSION__=$res"],[XEN_INCLUDES="$XEN_INCLUDES -D__XEN_INTERFACE_VERSION__=$res"])
#
rm -f build/conftest.i
[CONFIG_INCLUDE=$LINUX/include/$AUTOCONF_HDIR/kconfig.h])
AC_SUBST(CONFIG_INCLUDE)
+if test -e $CONFIG_INCLUDE; then
+ CONFIG_INCLUDE_FLAG="-include $CONFIG_INCLUDE"
+fi
+
# ------------ rhconfig.h includes runtime-generated bits --
# red hat kernel-source checks
AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
[m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])dnl
rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
-AS_IF([AC_TRY_COMMAND(cp conftest.c build && make -d [$2] ${LD:+"LD=$LD"} CC="$CC" -f $PWD/build/Makefile OFA_LINUX_CONFIG=$LINUX_CONFIG LINUXINCLUDE="-include $AUTOCONF_HDIR/autoconf.h $XEN_INCLUDES $EXTRA_OFA_INCLUDE -I$LINUX/arch/$SRCARCH/include -Iarch/$SRCARCH/include/generated -Iinclude -I$LINUX/arch/$SRCARCH/include/uapi -Iarch/$SRCARCH/include/generated/uapi -I$LINUX/include -I$LINUX/include/uapi -Iinclude/generated/uapi -I$LINUX/arch/$SRCARCH/include -Iarch/$SRCARCH/include/generated -I$LINUX/arch/`echo $target_cpu|sed -e 's/powerpc64/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/'`/include -I$LINUX/arch/`echo $target_cpu|sed -e 's/ppc.*/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/'`/include/generated -I$LINUX_OBJ/include -I$LINUX/include -I$LINUX_OBJ/include2 -include $CONFIG_INCLUDE" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $CROSS_VARS $MODULE_TARGET=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])],
+AS_IF([AC_TRY_COMMAND(cp conftest.c build && make -d [$2] ${LD:+"LD=$LD"} CC="$CC" -f $PWD/build/Makefile OFA_LINUX_CONFIG=$LINUX_CONFIG LINUXINCLUDE="-include $AUTOCONF_HDIR/autoconf.h $XEN_INCLUDES $EXTRA_OFA_INCLUDE -I$LINUX/arch/$SRCARCH/include -Iarch/$SRCARCH/include/generated -Iinclude -I$LINUX/arch/$SRCARCH/include/uapi -Iarch/$SRCARCH/include/generated/uapi -I$LINUX/include -I$LINUX/include/uapi -Iinclude/generated/uapi -I$LINUX/arch/$SRCARCH/include -Iarch/$SRCARCH/include/generated -I$LINUX/arch/`echo $target_cpu|sed -e 's/powerpc64/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/'`/include -I$LINUX/arch/`echo $target_cpu|sed -e 's/ppc.*/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/'`/include/generated -I$LINUX_OBJ/include -I$LINUX/include -I$LINUX_OBJ/include2 $CONFIG_INCLUDE_FLAG" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $CROSS_VARS $MODULE_TARGET=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])],
[$4],
[_AC_MSG_LOG_CONFTEST
m4_ifvaln([$5],[$5])dnl])