it can be included several times.
*/
-// VC 7.x isn't as bad as VC6 and doesn't give these warnings
-#if defined(__VISUALC__) && __VISUALC__ <= 1200
+// VC 7.x isn't as bad as VC6 and doesn't give these warnings but eVC (which
+// defines _MSC_VER as 1201) does need to be included as it's VC6-like
+#if defined(__VISUALC__) && __VISUALC__ <= 1201
// MSVC 5 does not have this
#if __VISUALC__ > 1100
+ // we have to disable (and reenable in afterstd.h) this one because,
+ // even though it is of level 4, it is not disabled by warning(push, 1)
+ // below for VC7.1!
+
+ // unreachable code
+ #pragma warning(disable:4702)
+
#pragma warning(push, 1)
#else // VC 5
// 'expression' : signed/unsigned mismatch
#pragma warning(disable:4018)
+ // 'identifier' : unreferenced formal parameter
+ #pragma warning(disable:4100)
+
// 'conversion' : conversion from 'type1' to 'type2',
// possible loss of data
#pragma warning(disable:4244)
#pragma warning(disable:4786)
#endif // VC++ < 7
+/**
+ GCC's visibility support is broken for libstdc++ in some older versions
+ (namely Debian/Ubuntu's GCC 4.1, see
+ https://bugs.launchpad.net/ubuntu/+source/gcc-4.1/+bug/109262). We fix it
+ here by mimicking newer versions' behaviour of using default visibility
+ for libstdc++ code.
+ */
+#if defined(HAVE_VISIBILITY) && defined(HAVE_BROKEN_LIBSTDCXX_VISIBILITY)
+ #pragma GCC visibility push(default)
+#endif