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Re: [Bug-gsl] Failure in make check after compile of V1.7 with mingw

From: Brian Gough
Subject: Re: [Bug-gsl] Failure in make check after compile of V1.7 with mingw
Date: Fri, 17 Feb 2006 16:59:36 +0000

Chris Rodie writes:
 > I have found a solution to the problem:  I added "-ffloat-store" to the 
 > CFLAGS declaration in the Makefile in the monte directory.  After 
 > recompiling, the test suite ran with no errors.  Now the whole library 
 > appears to test OK on this platform (pc-686-mingw).  It appears we're 
 > dealing with a difference in precion of values in fpu registers vs. 
 > values in values (see GNU docs on this gcc switch).  The problem appears 
 > only in this monte carlo algorithm, nowhere else in the library.

I don't know what default the Mingw people are using for their runtime
but if it's extended I would set the processor floating point mode to
double-precision and run the same code to see if it is that is the
cause, -ffloat-store will change the way it is optimised so it may
just mask the problem.

Brian Gough

Network Theory Ltd,
Publishing Free Software Manuals --- http://www.network-theory.co.uk/

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