next try, #elif not #elsif; refs #11

src/mrw/checkcxx11.hxx

@@ -13,7 +13,7 @@
 #  ifndef MRW__OLD_PRE11_COMPILER
 #    if __cplusplus < 201103L
 #      if __cplusplus==1
-#        ifdef defined(__APPLE__)
+#        if __APPLE__
            /// Code is compiled with old non C++11 standard compliant compiler
            /** There are workarounds for old non C++11 compatible
                compilers. These workarounds are deprecated, but will
@@ -70,7 +70,7 @@ namespace std {
 #    else
 #      warning trying standard C++11 support
 #    endif
-#  elsif defined(__APPLE__)
+#  elif __APPLE__
 #    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