GH-1052 switch over to C++14 everywhere

CMakeLists.txt

@@ -32,7 +32,7 @@ endif()
 set(CMAKE_JAVA_TARGET_OUTPUT_DIR ${PROJECT_BINARY_DIR}/jars)
 
 ######## Set compiler flags ########
-include(UseCXX11)
+include(UseCXX14)
 include(Coverage)
 set(CMAKE_CXX_FLAGS " -Wall ${CMAKE_CXX_FLAGS}")
 set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Werror=return-type")

cmake/UseCXX14.cmake

@@ -0,0 +1,13 @@
+if(__USECXX14_CMAKE__)
+    return()
+endif()
+set(__USECXX14_CMAKE__ TRUE)
+
+if(APPLE)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++ -std=c++14")
+elseif(UNIX)
+    # assume GCC, add C++0x/C++11 stuff
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14")
+elseif(MINGW)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++14")
+endif()

depends/util/CMakeLists.txt

@@ -1,6 +1,6 @@
 project(libUtil)
 
-include(UseCXX11)
+include(UseCXX14)
 include(Coverage)
 
 # Find Qt