Ubuntu

After upgrading to 13.10, clang and GCC erroneously look for GCC-4.7 headers

Reported by Nicholas Nethercote on 2013-10-24
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
gcc-4.8 (Ubuntu)
Undecided
Unassigned

Bug Description

I'm a Firefox developer. 13.04 was working fine. I upgraded to 13.10 and now I can't compile Firefox with either clang or GCC.

Here's a reduced test case:

  #include <memory>
  int main(void) {}

If I compile this with clang I get this:

[fjord:~/moz/mi5] clang++ a.cpp
In file included from a.cpp:1:
In file included from /usr/bin/../lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/memory:62:
/usr/bin/../lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/allocator.h:92:29: error:
      unknown template name '__allocator_base'
    class allocator: public __allocator_base<_Tp>
                            ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/allocator.h:116:25: error:
      expected '('
      : __allocator_base<_Tp>(__a) { }
                        ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/allocator.h:116:25: error:
      expected '{' or ','
3 errors generated.

The results with GCC are similar.

I found the problem is that both clang and GCC are somehow configured to look for some GCC 4.7 headers as well as GCC 4.8 headers -- both of them have |-I/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/x86_64-linux-gnu/c++/4.7| hardwired in the default flags.

As a workaround, I renamed /usr/include/c++/4.7/ and /usr/include/x86_64-linux-gnu/c++/4.7/ so the compilers could no longer find them, and now things are working normally. But obviously this should be fixed properly.

Horst Schirmeier (horst) wrote :

Cannot reproduce. I'm using 13.10 (x86_64; was upgraded from several earlier releases), only gcc-4.8 and clang-3.2 is installed.

$ clang++ a.cpp
$ g++ a.cpp
$ clang++ --version
Debian clang version 3.2-7ubuntu1 (tags/RELEASE_32/final) (based on LLVM 3.2)
Target: x86_64-pc-linux-gnu
Thread model: posix
$ g++ --version
g++ (Ubuntu/Linaro 4.8.1-10ubuntu8) 4.8.1
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

gcc seems to use the correct include paths here (see attachment).

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