Clang: Add -Wno-error=undefined-func-template

cmake/compiler_clang.cmake

@@ -35,6 +35,16 @@ add_definitions(-Wno-error=undefined-reinterpret-cast)
 # Clang on recent XCode fails to compile the boost tests
 add_definitions(-Wno-error=disabled-macro-expansion)
 
+# Clang-5.0 notices this on runtimeconfiguration.cpp:201:14
+#
+# 'boost::program_options::parse_config_file<char>' required here, but no
+# definition is available [-Werror,-Wundefined-func-template]
+# store( parse_config_file( cfile, configFileOptions), vm);
+#
+# FIXME: This is a workaround, not a solution.
+# See #191 at https://github.com/dannyedel/dspdfviewer/issues/191
+add_definitions(-Wno-error=undefined-func-template)
+
 #message(FATAL_ERROR "Version: ${CMAKE_CXX_COMPILER_VERSION}")
 
 # clang will complain about -isystem passed but not used.