cmake: do not build libblk if libblk_srcs is empty

if we don't or just not able to buld libblk, let's skip it.

Signed-off-by: Kefu Chai <kchai@redhat.com>

diff --git a/src/blk/CMakeLists.txt b/src/blk/CMakeLists.txt
index 849f3eef9de2e513effe7eebb2d32e404e0f0c5a..aaebc3c99f0f9713a0e4e49da1c97c3fb71c1785 100644 (file)
--- a/src/blk/CMakeLists.txt
+++ b/src/blk/CMakeLists.txt
@@ -25,8 +25,10 @@ if(WITH_ZBD)
     zoned/HMSMRDevice.cc)
 endif()
 
-add_library(blk STATIC ${libblk_srcs})
-target_include_directories(blk PRIVATE "./")
+if(libblk_srcs)
+  add_library(blk STATIC ${libblk_srcs})
+  target_include_directories(blk PRIVATE "./")
+endif()
 
 if(HAVE_LIBAIO)
   target_link_libraries(blk PUBLIC ${AIO_LIBRARIES})