__cplusplus==1 has no C++11 on Mac; refs #7

configure.in

@@ -1,5 +1,4 @@
 # $Id$
-set +x
 m4_include(ax_cxx_compile_stdcxx_11.m4)
 AC_ALIAS([AC_DEFINE_DIR], [AX_DEFINE_DIR])
 AC_DEFUN([AX_DEFINE_DIR], [

src/mrw/checkcxx11.hxx

@@ -27,14 +27,14 @@
 #  endif
 
 #  if __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
 #  endif
 
 
 #  ifdef MRW__OLD_PRE11_COMPILER
-// __cplusplus==1 is a known bug in gcc 4.6.3
-#    if __cplusplus<200300L && __cplusplus!=1
+#    if __cplusplus<200300L
 #      include <boost/shared_ptr.hpp>
 namespace std {
   // there is no std::shared_ptr in pre C++11 compilers, so we use the