tools/virtio: option to build an out of tree module

[sfrench/cifs-2.6.git] / tools / virtio / Makefile

diff --git a/tools/virtio/Makefile b/tools/virtio/Makefile
index 8e2a908115c2d5476d14c94df6af6ed1e865d917..f33f32f1d20802e678e5e85f6bd23d298b3705fe 100644 (file)
--- a/tools/virtio/Makefile
+++ b/tools/virtio/Makefile
@@ -8,7 +8,32 @@ CFLAGS += -g -O2 -Werror -Wall -I. -I../include/ -I ../../usr/include/ -Wno-poin
 vpath %.c ../../drivers/virtio ../../drivers/vhost
 mod:
        ${MAKE} -C `pwd`/../.. M=`pwd`/vhost_test V=${V}
-.PHONY: all test mod clean
+
+#oot: build vhost as an out of tree module for a distro kernel
+#no effort is taken to make it actually build or work, but tends to mostly work
+#if the distro kernel is very close to upstream
+#unsupported! this is a development tool only, don't use the
+#resulting modules in production!
+OOT_KSRC=/lib/modules/$$(uname -r)/build
+OOT_VHOST=`pwd`/../../drivers/vhost
+#Everyone depends on vhost
+#Tweak the below to enable more modules
+OOT_CONFIGS=\
+       CONFIG_VHOST=m \
+       CONFIG_VHOST_NET=n \
+       CONFIG_VHOST_SCSI=n \
+       CONFIG_VHOST_VSOCK=n
+OOT_BUILD=KCFLAGS="-I "${OOT_VHOST} ${MAKE} -C ${OOT_KSRC} V=${V}
+oot-build:
+       echo "UNSUPPORTED! Don't use the resulting modules in production!"
+       ${OOT_BUILD} M=`pwd`/vhost_test
+       ${OOT_BUILD} M=${OOT_VHOST} ${OOT_CONFIGS}
+
+oot-clean: oot-build
+oot: oot-build
+oot-clean: OOT_BUILD+=clean
+
+.PHONY: all test mod clean vhost oot oot-clean oot-build
 clean:
        ${RM} *.o vringh_test virtio_test vhost_test/*.o vhost_test/.*.cmd \
               vhost_test/Module.symvers vhost_test/modules.order *.d