Hi Patrick,
On Tue, 2005-04-19 at 14:20 +0200, Patrick Daehne wrote:
> Hello,
>
> maybe it is generally a good idea to replace the OSG-defined symbol "darwin"
> by the symbol "__APPLE__" that is defined by default on MacOS X (and
> Darwin).
>
> BTW, a similar problem exists on Windows - all Windows-specific code is
> enabled by the OSG-defined symbol "WIN32", instead of the symbol "_WIN32"
> that is defined by default (at least when using the Microsoft and the Intel
> compilers).
yeah, we had a discussion about inventing our own system-identification
defines before, and it didn't seem necessary at the time. But given the
fact that things apparently change more often than we expected, it might
be a good idea to revisit that.
Here's my proposal:
add to the head of OSGConfig.h some platform/compiler detection defines.
I'm thinking of defines like these:
OSG_OS_WINDOWS, OSG_OS_IRIX, OSG_OS_LINUX, OSG_OS_MACOSX etc.
OSG_OS (with a value of "WINDOWS", "IRIX", etc.)
OSG_OS_MAJOR_VERSION, OSG_OS_MINOR_VERSION (e.g. "2","69" for my FC3)
OSG_COMPILER_CL, OSG_COMPILER_ICC, OSG_COMPILER_GCC etc.
OSG_COMPILER (with a value of "CL", "ICC", etc.)
OSG_COMPILER_MAJOR_VERSION, OSG_COMPILER_MINOR_VERSION (e.g. "3", "42"
for FC3)
It might be worth having some combined ones for OS/compiler combinations
like OSG_WINDOWS_ICL, OSG_LINUX_ICL etc.
Based on these OSGConfig should set feature-specific defines (which it
already does quite a lot), and the other system headers should be as
platform-independent as possible.
Comments? How do other systems handle this?
Dirk
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