Re: [Texmacs-dev] Non-fatal make error - no big deal

[Gabriel Dos Reis]

Martin Costabel <address@hidden> writes:

| Nix N. Nix wrote:
| []
| > src/maple_filter.cc:27: `string' was not declared in this scope
| []
| > I think this has been around since about 1.0.1.5 (IIRC).  Is it just
| > me
| > ?  As I said, it's no big deal, I'm just curious.
| 
| No, it's not just you. I reported it to this list some days ago. There
| was no explanation given yet. It seems to be a gcc-2 vs gcc-3
| thing.

The program is in error because the entire C++ standard library is put
in the standard namespace std as per the language definition.  The
library shipped with GCC-2.95.x is known *not* to be conformant.

| With gcc-2.95.2 it compiles OK (at least on Darwin/Mac OSX),
| but with gcc-3.1 it breaks.

GCC-2.95.2 accepted the code because

  * on the library side: all standard entities were in the global
    namespace instead of the standard namespace.

  * on the compiler side: the compiler had special magic to handle
    "std::" just as /* nothing */.  That was done as an attempt to
    make conformant codes to compile successfully.

Now that GCC-3.x is much more conformant, the compiler built-in hack
has been removed (for good things, because it caused us to reject some
well-formed programs).

The fix is to prefix standard entities with std::.  That will work
with both GCC-2.95.x and GCC-3.x

HTH

-- Gaby