Public bug reported:

Binary package hint: g++-4.3

I'm not enough of a c++ guy to fully understand what's going on here,
but the fact that the behavior changes is strange:

g++ (Ubuntu 4.3.2-1ubuntu11) 4.3.2

CPLUS_INCLUDE_PATH=/usr/include/ g++-4.3 -o hm hm.cpp <- fails

g++-4.2 (GCC) 4.2.4 (Ubuntu 4.2.4-3ubuntu4)

CPLUS_INCLUDE_PATH=/usr/include/ g++-4.2 -o hm hm.cpp <- ok!

hm.cpp:

#include <ext/hash_map>
int main () { __gnu_cxx::hash_map<int, int> t; return 0; }

** Affects: gcc-4.3 (Ubuntu)
     Importance: Undecided
         Status: New

** Summary changed:

- CPLUS_INCLUDE_PATH behaves different from g++ 4.2 to 4.3
+ CPLUS_INCLUDE_PATH behaves differently with g++ 4.2 and g++ 4.3

-- 
CPLUS_INCLUDE_PATH behaves differently with g++ 4.2 and g++ 4.3
https://bugs.launchpad.net/bugs/298774
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