[cmake] fix: Only modify CMAKE_SHARED_LINKER_FLAGS if defined.

NilsBrause · Oct 10, 2019 · 7c72bbd · 7c72bbd
1 parent 76af23f
commit 7c72bbd
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -49,7 +49,9 @@ cmake_dependent_option(BUILD_EXAMPLES
   "BUILD_LIBRARIES" OFF)
 
 # Do not report undefined references in libraries, since the protocol libraries cannot be used on their own.
-string(REPLACE "-Wl,--no-undefined" "" CMAKE_SHARED_LINKER_FLAGS ${CMAKE_SHARED_LINKER_FLAGS})
+if(CMAKE_SHARED_LINKER_FLAGS)
+  string(REPLACE "-Wl,--no-undefined" " " CMAKE_SHARED_LINKER_FLAGS ${CMAKE_SHARED_LINKER_FLAGS})
+endif()
 
 # variables for .pc.in files
 set(prefix "${CMAKE_INSTALL_PREFIX}")