i386-apple-darwin9 failures

[Ben Abbott]

On Dec 8, 2007, at 3:46 PM, Ben Abbott wrote:

>
> On Dec 8, 2007, at 2:30 PM, Jack Howarth wrote:
>
>> Ben,
>>   For a build on powerpc-apple-darwin9.10., using the
>> proposed oct-time.cc patch...
>>
>> [...]
>> export CFLAGS='-O3'
>> export CXXFLAGS='-O3'
>> export FFLAGS='-O3'
>> ./configure --prefix=/sw --with-f77=/sw/bin/gfortran --infodir='$ 
>> {prefix}/share/info' --mandir='${prefix}/share/man' --libexecdir='$ 
>> {prefix}/lib' -enable-shared -enable-dl --disable-static --with- 
>> blas="-L/sw/lib -framework Accelerate" --without-mpi --with-hdf5 -- 
>> with-fftw
>> [...]
>> checking for strptime... yes
>> [...]
>> checking whether strptime is broken... no
>> [...]
>> configure: running /bin/sh ./configure '--prefix=/sw'  '--with-f77=/ 
>> sw/bin/gfortran' '--infodir=${prefix}/share/info' '--mandir=$ 
>> {prefix}/share/man' '--libexecdir=${prefix}/lib' '-enable-shared' '- 
>> enable-dl' '--disable-static' '--with-blas=-L/sw/lib -framework  
>> Accelerate' '--without-mpi' '--with-hdf5' '--with-fftw' 'CFLAGS=- 
>> O3' 'LDFLAGS=-L/sw/lib' 'CPPFLAGS=-I/sw/include' 'CXXFLAGS=-O3'  
>> 'FFLAGS=-O3' --cache-file=/dev/null --srcdir=.
>> [...]
>> Octave is now configured for powerpc-apple-darwin9.1.0
>>
>>  Source directory:     .
>>  Installation prefix:  /sw
>>  C compiler:           gcc   -Wall -W -Wshadow -O3
>>  C++ compiler:         g++   -Wall -W -Wshadow -Wold-style-cast -O3
>>  Fortran compiler:     gfortran -O3
>>  Fortran libraries:     -L/sw/lib -L/sw/lib/gcc4.2/lib/gcc/powerpc- 
>> apple-darwin9/4.2.2 -L/sw/lib/gcc4.2/lib/gcc/powerpc-apple- 
>> darwin9/4.2.2/../../.. -lhdf5 -lz -lm -lgfortranbegin -lgfortran - 
>> lSystemStubs
>>  BLAS libraries:        -L/sw/lib -framework Accelerate
>>  FFTW libraries:       -lfftw3
>>  GLPK libraries:       -lglpk
>>  UMFPACK libraries:    -lumfpack
>>  AMD libraries:        -lamd
>>  CAMD libraries:       -lcamd
>>  COLAMD libraries:     -lcolamd
>>  CCOLAMD libraries:    -lccolamd
>>  CHOLMOD libraries:    -lcholmod
>>  CXSPARSE libraries:   -lcxsparse
>>  HDF5 libraries:       -lhdf5
>>  CURL libraries:       -lcurl
>>  REGEX libraries:      -L/sw/lib -lpcre
>>  QHULL libraries:	-lqhull
>>  LIBS:                 -lreadline  -lncurses -lhdf5 -lz -lm
>>  Default pager:        less
>>  gnuplot:              gnuplot
>>
>>  Do internal array bounds checking:  false
>>  Build static libraries:             false
>>  Build shared libraries:             true
>>  Dynamic Linking:                    true (dyld)
>>  Include support for GNU readline:   true
>>  64-bit array dims and indexing:     false
>> [...]
>> make check
>> [...]
>> test_signal.m .......................................... PASS     
>> 7/8    FAIL 1
>> [...]
>> Summary:
>>
>>  PASS   3769
>>  FAIL      1
>> ---------------------------
>> Repeating your manual check I get...
>>
>> octave:1> N=32;
>> octave:2> x = (0:1:N-1)/N + 2;
>> octave:3> y = detrend(x);
>> octave:4> assert(all (all (abs (y) < 10*eps)));
>> error: assert (all (all (abs (y) < 10 * eps))) failed
>> error: evaluating if command near line 76, column 5
>> error: evaluating if command near line 75, column 3
>> error: called from `assert' in file `/sw/share/octave/2.9.18/m/ 
>> testfun/assert.m'
>> octave:4> max(y)
>> ans =  2.2204e-15
>> octave:5> 10*eps
>> ans =  2.2204e-15
>> octave:6> y'
>> ans =
>>
>>   2.2204e-16
>>   4.4409e-16
>>   4.4409e-16
>>   4.4409e-16
>>   4.4409e-16
>>   4.4409e-16
>>   4.4409e-16
>>   8.8818e-16
>>   8.8818e-16
>>   8.8818e-16
>>   8.8818e-16
>>   8.8818e-16
>>   8.8818e-16
>>   8.8818e-16
>>   8.8818e-16
>>   1.3323e-15
>>   1.3323e-15
>>   1.3323e-15
>>   1.3323e-15
>>   1.3323e-15
>>   1.3323e-15
>>   1.3323e-15
>>   1.7764e-15
>>   1.7764e-15
>>   1.7764e-15
>>   1.7764e-15
>>   1.7764e-15
>>   1.7764e-15
>>   1.7764e-15
>>   1.7764e-15
>>   2.2204e-15
>>   2.2204e-15
>>
>> Changing...
>>
>> assert(all (all (abs (y) < 10*eps)));
>>
>> to...
>>
>> assert(all (all (abs (y) <= 10*eps)));
>>
>> eliminates the test failure and I get...
>>
>> Summary:
>>
>>  PASS   3770
>>  FAIL      0
>
> ok
>
> So we get the same results with different compilers, different  
> versions of MacOSX, and different levels of optimization ... correct?
>
> I wrote a short script to see how the max value of y varies with N.
>
> for N=1:100
>   x = (0:1:N-1)/N + 2;
>   y(N) = max (detrend (x));
> end
>
> max(y)
> ans =  3.1086e-15
> find(y==max(y))
> ans =  47
>
> Thus it appears that the problem (?) for this example is limited to  
> 14*eps.
>
> Perhaps 10*eps can be replaced by 20*eps, or is there reason for a  
> greater concern here?
>
> Ben
>

John,

After reviewing the other test scripts in test_signal.m, it appears  
(to me) that the "10" was arbitrarily chosen. Thus, please consider  
this patch

I've had some trouble in the past with EOL characters in my patches.  
Let me know if that problem persists.

Ben





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