cmake: use string(APPEND ..) to append to string

more readable and less repeating this way.

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

diff --git a/cmake/modules/BuildSPDK.cmake b/cmake/modules/BuildSPDK.cmake
index c5351956c69575322afa2485e0094371b13271fb..73ead20c8035ddf17d047d6b8775a1e8ea43c4df 100644 (file)
--- a/cmake/modules/BuildSPDK.cmake
+++ b/cmake/modules/BuildSPDK.cmake
@@ -16,7 +16,7 @@ macro(build_spdk)
   include(CheckCCompilerFlag)
   check_c_compiler_flag("-Wno-address-of-packed-member" HAS_WARNING_ADDRESS_OF_PACKED_MEMBER)
   if(HAS_WARNING_ADDRESS_OF_PACKED_MEMBER)
-    set(spdk_CFLAGS "${spdk_CFLAGS} -Wno-address-of-packed-member")
+    string(APPEND spdk_CFLAGS " -Wno-address-of-packed-member")
   endif()
   include(ExternalProject)
   if(CMAKE_SYSTEM_PROCESSOR MATCHES "amd64|x86_64|AMD64")