skip three unsupported compiler flags if g++ is below 5.1; fixes #76

Author: bast

CHANGELOG.md

@@ -11,6 +11,7 @@
   It is possible to specify a classical charge distribution of point multipoles.
   This can be an additional source of electrostatic potential for the calculation
   of the ASC.
+- Restored compilation for g++ < v5.1.
 
 ## [Version 1.1.10] - 2017-03-27
 

cmake/custom/compilers/GNU.CXX.cmake

@@ -14,7 +14,10 @@ if(NOT DEFINED ENV{CXXFLAGS})
     endif()
 
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CXX_STANDARD_FLAG}")
-    set(EXDIAG_CXX_FLAGS -Wsuggest-attribute=pure -Wsuggest-attribute=const -Wsuggest-attribute=noreturn -Wsuggest-final-types -Wsuggest-final-methods -Wsuggest-override -Wuseless-cast -Wunsafe-loop-optimizations)
+    set(EXDIAG_CXX_FLAGS -Wsuggest-attribute=pure -Wsuggest-attribute=const -Wsuggest-attribute=noreturn -Wuseless-cast -Wunsafe-loop-optimizations)
+    if(NOT CXX_COMPILER_VERSION VERSION_LESS 5.1.0)
+        set(EXDIAG_CXX_FLAGS ${EXDIAG_CXX_FLAGS} -Wsuggest-final-types -Wsuggest-final-methods -Wsuggest-override)
+    endif()
     if(CXX_COMPILER_VERSION VERSION_LESS 4.9.0 OR NOT ENABLE_CXX11_SUPPORT)
       message(STATUS "Turning off extended diagnostic flags.")
       set(EXDIAG_CXX_FLAGS)