I have compiled PostgreSQL 7.1.2 with gcc 3.0.1, and have the following
problem: if I include first libpq++.h before iostream, id est:
#include <libpq++.h>
#include <iostream>
the compiler complains:
In file included from /usr/include/g++-v3/bits/locale_facets.tcc:38,
from /usr/include/g++-v3/bits/std_locale.h:41,
from /usr/include/g++-v3/bits/ostream.tcc:32,
from /usr/include/g++-v3/bits/std_ostream.h:278,
from /usr/include/g++-v3/bits/std_iostream.h:40,
from /usr/include/g++-v3/iostream:31,
from p.cc:3:
/usr/include/g++-v3/bits/std_limits.h:286:5: missing binary operator
/usr/include/g++-v3/bits/std_limits.h:483:5: missing binary operator
This is because somewhere in PostgreSQL you have the following code:
#ifndef true
#define true ((bool)1)
#endif
and it seems that in gcc 3.0.1, "true" is not defined, or that "true" is
a reserved word doesn't mean that is defined, or that the offending
lines below they don't exist in std_limit.h, I don't know as I no longer
have the old compiler. The workaround is to include first iostream, and
then libpq++. The offending lines in std_limits.h are the following:
#ifdef __CHAR_UNSIGNED__
#define __glibcpp_plain_char_is_signed false
#else
#define __glibcpp_plain_char_is_signed true
#endif
end somewhere below this one:
#if __glibcpp_plain_char_is_signed
#endif
which is preprocessed to:
#if true
#endif
when the #include<iostream> is before libpq++ and:
#if ((bool)1)
#endif
otherwise. This last statement is invalid for the compiler.
Leandro Fanzone
