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From: Adriaan van Os
Subject: New (gpc-20060325)
Date: 28 Mar 2006, 15:20:50
Mirsad Todorovac wrote: > Adriaan van Os wrote: > >>> I suppose this means you are running Tiger. What could I do to build >>> on old machines with Panther or Jaguar? >> >> I haven't tried gpc-20060325 with gcc-4 on Mac OS X 10.3. I guess it >> is possible, because I do have a FSF gcc 4.0 C compiler running on >> Mac OS X 10.3.9. However, for important new features like creating >> 64-bit applications, you would need Mac OS X 10.4 anyway, so there is >> no point in moving to gcc-4 on Mac OS X 10.3, as gcc-3.4.x is more >> stable at this point. > > I have built gcc-4.2 (experimental) on 10.3.9 and it has built OK. > Perhaps this was too much of a bravery, but I was chasing those new > optimizations for G5 machines. In fact, which -march and -mtune > parameters do you recommend for speed-demanding builds? (Of course, > while compiling the compiler itself, I am more conservative ...) -mtune=G5, -mcpu=G5, -O3 <http://gcc.gnu.org/onlinedocs/gcc-4.0.3/gcc/RS_002f6000-and-PowerPC- Options.html> However, generating 64-bit instructions (which is something different than generating a 64-bit application) is not fully reliable yet (but you can experiment with it, maybe rebuild libgpc.a). Possibly also --fast-math <http://gcc.gnu.org/onlinedocs/gcc-4.0.3/gcc/Optimize-Options.html> (for non-IEEE calculations). You can also have a look at <http://developer.apple.com/performance/accelerateframework.html>. >> Since I sold my old G4, I can not run and test Mac OS X 10.2 anymore >> (I now have a G5 with 10.3.9 and 10.4). > > I still have a G4 running in the lab with 10.2.8. I wonder if this > platform is considered obsoleted now? Sadly, even 10.3.9 is not > updated in development tools, and I don't think our institution will > provide for 10.4.2 ... Apple policies, sadly. Regards, Adriaan van Os
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