Mac is different; refs #10

src/mrw/checkcxx11.hxx

@@ -12,7 +12,19 @@
 // otherwise there is a fallback wich makes everything much more compliacted
 #  ifndef MRW__OLD_PRE11_COMPILER
 #    if __cplusplus < 201103L
-#      if __cplusplus==1
+#      if __APPLE__
+         /// Code is compiled with an old non C++11 standard compliant compiler
+         /** There are workarounds for old non C++11 compatible
+             compilers. These workarounds are deprecated, but will remain until
+             most compilers fully support C++11. So this workaround will be
+             removed in future releases, when support for C++11 is more
+             common. Only rely on this workaround, if you really have to. */
+#        define MRW__OLD_PRE11_COMPILER
+#        warning you need a C++11 compliant compiler, on gcc: add -std=c++11
+#        warning emulating C++11 - this changes the way you use the library
+#        warning this is deprecated and will be removed in future releases
+#        warning refere to the library documentation for more details
+#      elif __cplusplus==1
          // __cplusplus==1 is a known bug in gcc 4.6.3
 #        warning your compiler has a know bug, please upgrade to gcc >= 4.7
 #        warning see __cplusplus in http://gcc.gnu.org/gcc-4.7/changes.html