[Openexr-devel] gcc 3.3 is golden

[Greg Ward]

I just downloaded the gcc 3.3 compiler from the Apple Developer 
website, and it seems to have licked all the problems I was seeing.  I 
hadn't done this earlier because I'd been so bitten by the buggy 
optimizer in gcc 3.2 screwing my own code, that I was waiting to see 
what I read about 3.3.  Well, it seems to do the trick.  I recompiled 
OpenEXR 1.0.6 under OS X and it passed all its checks with flying 
colors -- including the notorious problem it was having with the C++ 
stream library in IlmImf.  I didn't even need to use 
--enable-osx-istream-hack on configure, which was a blessing.

I did see some suspicious warnings from the compiler that I hadn't seen 
before, though.  Here is a sample:

ImfRgbaFile.cpp: In member function `void 
Imf::RgbaOutputFile::setFrameBuffer(const Imf::Rgba*, long unsigned 
int, long unsigned int)':
ImfRgbaFile.cpp:186: warning: invalid access to non-static data member 
`Imf::Rgba::r' of NULL object
ImfRgbaFile.cpp:186: warning: (perhaps the `offsetof' macro was used 
incorrectly)

Since the 3.3 compiler is freely available from Apple and it seems to 
be much more reliable than 3.2 (and even 3.1), we should recommend that 
as a solution to OS X developers.

-Greg