[boost] [program_options] post-review version -- compile problem

From: Rob Lievaart (Rob.Lievaart_at_[hidden])
Date: 2004-03-24 04:40:32

Hi,

I just downloaded and compiled the version 262 of the 
library using Mingw (gcc 3.2.3) and I ran into a problem 
compiling parser.cpp:

The function parse_environment contains the following lines:

#if defined(_WIN32) 
char **environ = _environ;
#endif

But the mingw provided stdlib.h contains an unconditional

#define environ _environ

So it does not compile :-(

I changed parser.cpp to 

#if defined(_WIN32) && !defined( __MINGW32__ )
char **environ = _environ;
#endif

And now it compiles and the samples run, but I have not 
actually tried to use enviroment variables.

Also I checked the stdlib.h provided with MSVC6.5 and
that contains

#ifdef _POSIX_
extern char ** environ;                 /* pointer to environment table */
#else

But I guess this would not cause a problem when _POSIX_ is defined, 
because the local environ would just hide the one from stdlib.h.

And a small question, is the library supposed to work with 6.5 at all? 
I get a rather large amount of errors and warnings when I try to build 
it. I haven't looked into them yet, if it is not supposed to work then I
won't spend any time on it.

Rob Lievaart