Intel 8.0 compiler optimization switches
From: Peter Forthmann (peter_at_peterundsinje.de)
Date: 01/31/04
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Date: Fri, 30 Jan 2004 18:09:24 -0800
Hi,
I am testing the Intel 8.0 Compiler for Linux. For all the sources I have compiled It produces a lot
faster code than the GNU g++ compiler. However, I must have something wrong, since I can't use the
-ipo and -xW options for interprocedural optimization and Pentium4 optimization, which is supposed
to give a lot of speed up on top.
When I add the -ipo switch everything compiles ok, but then I get the linker error:
/usr/bin/ld:cppobj/Debug_pf.o: file format not recognized; treating as linker script
/usr/bin/ld:cppobj/Debug_pf.o:1: parse error
With the -xW switch it compiles OK and tells me that it does some vectorization optimization, but
when it comes to linking, it errors out saying:
cppobj/spline_pf.o(.text+0x81): In function `CalcCubicSplineCoeffs(float*, int, float*)':
: undefined reference to `vmlsPow4'
Anybody an idea what could be wrong?
Thanks,
Peter.
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