Don't set CPP_THROW_NEW for non-gnu compilers until I figure out why every commercial compiler (except MSVC) dies on this.

configure

@@ -12506,7 +12506,7 @@ _MOZ_CPP_EXCEPTIONS=1
 fi
 
 
-if test "$_MOZ_CPP_EXCEPTIONS"; then
+if test "$_MOZ_CPP_EXCEPTIONS" -o -z "$GNU_CC"; then
     cat >> confdefs.h <<\EOF
 #define CPP_THROW_NEW 
 EOF

configure.in

@@ -4032,7 +4032,7 @@ else
 fi
 _MOZ_CPP_EXCEPTIONS=1 ])
 
-if test "$_MOZ_CPP_EXCEPTIONS"; then
+if test "$_MOZ_CPP_EXCEPTIONS" -o -z "$GNU_CC"; then
     AC_DEFINE(CPP_THROW_NEW, [])
 else
     AC_DEFINE(CPP_THROW_NEW, [throw()])