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Re: New GCC takes 19x as long to compile my program (compared to old GCC), plus void** patch suggestion
On 08/10/2012 10:44 AM, Elmar Krieger wrote:
Hi Ian, hi Richard, hi Andi!
Many thanks for your comments.
>>> The slowdown is not the same with other files, so I'm essentially sure
>>> that this specific source file has some 'feature' that catches GCC at
>>> the wrong leg. This raises my hopes that one of the GCC experts wants
>>> to take a look at it. The code is confidential,
>> You could file a bug report with just a profile output of the compiler
>> (e.g. from oprofile or perf)
> But please use a pristine FSF compiler. You can also run the source
> some obfuscation tool. Or get a first hint with using -ftime-report.
> In the end, without a testcase there is nothing to do for us ...
I downloaded the latest official GCC 4.7.1, but unfortunately configure
stopped with "Building GCC requires GMP 4.2+, MPFR 2.3.1+ and MPC
0.8.0+.", and for my CentOS Linux, only older versions of this libs are
available as RPMs. I saw many hours of manual fiddling ahead, so I
suggest a more efficient solution:
I think some of those are available as RPMs from the EPEL
But installing them from source into a location that doesn't
conflict with the default OS install is straight forward and
Joel Sherrill, Ph.D. Director of Research& Development
joel.sherrill@OARcorp.com On-Line Applications Research
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