The CMP page is the correct place for these things:

   http://www.fltk.org/cmp.php

Just add another section near the end for preprocessor standards.

On Jan 7, 2011, at 11:02 AM, Albrecht Schlosser wrote:

> I don't think that we currently have a clear documentation of
> FLTK's usage of compiler, OS, and FLTK's own #define's.
> 
> Should I (we) try to write such docs, and where would be a useful
> place? Maybe in the OS-specific documentation chapter ? Or in the
> developer section?
> 
> 
> Here are some first thoughts:
> 
> WIN32 is defined on Windows (32- and 64-bit) systems by FLTK,
> except if configured with --enable-cygwin --enable-x11.
> It is a synonym for "we use GDI for drawing".
> 
> __CYGWIN__ means that configure used --enable-cygwin. The
> resulting programs must be linked with the Cygwin dll (currently
> cygwin1.dll) and can use Cygwin's POSIX layer emulation on Windows.
> This is free for personal/internal use, but you need a special
> license from Redhat if you want to distribute your programs.
> __CYGWIN__ can be combined with WIN32, which means that FLTK
> still uses GDI for drawing.
> 
> _WIN32 is defined by all (?) Windows compilers when compiling
> programs for Windows. The Cygwin (MinGW) compilers do also define
> it if you compile with -mno-cygwin (gcc 3) or use the MinGW cross
> compilers (gcc 4.x and later). It is not defined when compiling
> under Cygwin for use with the POSIX layer (Cygwin dll).
> 
> _WIN64 is defined by all (?) Windows compilers when compiling
> programs for Windows for a 64-bit target. This can be combined
> with _WIN32 (for backwards compatibility). I don't know whether
> Cygwin defines this off the top of my head (I can check it).
> 
> FLTK 1.3 always defines USE_X11 as 0 or 1, depending on the usage of
> X11 or not (in config.h). This is not defined in FLTK 1.1.
> 
> More about __APPLE__, _MSC_VER, ... and its usage...
> 
> Maybe also FLTK_HAVE_CAIRO, FLTK_USE_CAIRO, other HAVE_* ...
> 
> 
> Albrecht
> _______________________________________________
> fltk-dev mailing list
> [email protected]
> http://lists.easysw.com/mailman/listinfo/fltk-dev

________________________________________
Michael Sweet, Easy Software Products

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