when linking a DSO, require all symbols to be resolved

CMakeLists.txt

@@ -133,7 +133,12 @@ if(CMAKE_COMPILER_IS_GNUCXX)
         # Set default flags for Debug build.
         set(CMAKE_C_FLAGS_DEBUG "-Wall ${KICAD_GCC_DEBUG_BUILD_FLAGS} -g3 -ggdb3 -DDEBUG")
         set(CMAKE_CXX_FLAGS_DEBUG "-Wall ${KICAD_GCC_DEBUG_BUILD_FLAGS} -g3 -ggdb3 -DDEBUG")
+
     else(WIN32)
+        # Thou shalt not link vaporware and tell us it's a valid DSO:
+        set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--no-undefined")
+        set(CMAKE_MODULE_LINKER_FLAGS "-Wl,--no-undefined") # needed by SWIG macros on linux
+
         # Set default flags for Release build.
         set(CMAKE_C_FLAGS_RELEASE "-Wall ${KICAD_GCC_RELEASE_BUILD_FLAGS} -DNDEBUG -fPIC")
         set(CMAKE_CXX_FLAGS_RELEASE "-Wall ${KICAD_GCC_RELEASE_BUILD_FLAGS} -DNDEBUG -fPIC")

pcbnew/CMakeLists.txt

@@ -304,10 +304,8 @@ if (KICAD_SCRIPTING)
        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
     )
 
-
 endif(KICAD_SCRIPTING)
 
-
 ###
 # _pcbnew DLL/DSO file creation
 ###
@@ -328,6 +326,7 @@ if (KICAD_SCRIPTING_MODULES)
       ${OPENGL_LIBRARIES}
       ${GDI_PLUS_LIBRARIES}
       ${PYTHON_LIBRARIES}
+      rt
       )
 
 endif (KICAD_SCRIPTING_MODULES)