cmake: allows undefined symbol in plugin on osx

clang on osx erros out when linking a dynamic library if any symbols is
missing by default. so disable this behavior.

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

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 510bd173d23727dc6182437366a1bf8fe80c7307..1f5b8d8aac57c7ecd98fe039dd871fc70bfae2bc 100644 (file)
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -52,6 +52,9 @@ elseif(CMAKE_CXX_COMPILER_ID STREQUAL Clang)
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-varargs")
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-gnu-designator")
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-missing-braces -Wno-parentheses -Wno-deprecated-register")
+  if(APPLE)
+    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -undefined dynamic_lookup")
+  endif()
 endif(CMAKE_CXX_COMPILER_ID STREQUAL GNU)
 set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_CXX_FLAGS}")