If I fix the PATH, then installing Math::GSL fails for me, too

If I set PKG_CONFIG_PATH env var to the location of the gsl.pc file:

set PKG_CONFIG_PATH=D:\sp\_64\sp-5.32.1\perl\site\lib\auto\share\dist\
+Alien-GSL\lib\pkgconfig
[download]

then I get a little bit further but it still fails because Build.PL inc/Ver2Func.pm doesn't cater for the possibility that the gsl library is at a version greater than 2.7. The build terminated with:

....
Asking PkgConfig with ENV{PKG_CONFIG_PATH}=D:\sp\_64\sp-5.32.1\perl\si
+te\lib\auto\share\dist\Alien-GSL\lib\pkgconfig:/usr/pkgconfig:/usr/li
+b/pkgconfig:/usr/local/lib/pkgconfig:/usr/local/pkgconfig:/usr/libdat
+a/pkgconfig:/usr/local/libdata/pkgconfig:/opt/pkgconfig

Checking if gcc supports "-Wall"...yes
Checking if gcc supports "-Wno-sometimes-uninitialized"...yes
Checking if gcc supports "-Wno-unused-function"...yes
Checking if gcc supports "-Wno-unused-value"...yes
Checking if gcc supports "-Wno-unused-function"...yes
Checking if gcc supports "-Wno-unused-variable"...yes
Checking if gcc supports "-Wno-gnu"...yes
Checking if gcc supports "-g"...Unsupported GSL version!!! : 2.7.1 at 
+Build.PL line 85.
yes
-> N/A
-> FAIL Configure failed for Math-GSL-0.43. See D:\sp\_64\sp-5.32.1\da
+ta\.cpanm\work\1668033142.8832\build.log for details.
[download]

So I changed the "2.7" => { to "2.7.1" => { in inc/Ver2Func.pm, installed the missing build prerequisites (Test::Class, Test::Most and Test::Taint) using cpanm, and built the damn thing manually by running perl Build.PL, perl Build test and perl build install.
There were a few test failures:

Test Summary Report
-------------------
t\00-load.t      (Wstat: 65280 Tests: 1 Failed: 0)
  Non-zero exit status: 255
  Parse errors: No plan found in TAP output
t\Histogram.t    (Wstat: 768 Tests: 43 Failed: 0)
  Non-zero exit status: 3
  Parse errors: Bad plan.  You planned 74 tests but ran 43.
t\Histogram2D.t  (Wstat: 768 Tests: 52 Failed: 0)
  Non-zero exit status: 3
  Parse errors: Bad plan.  You planned 89 tests but ran 52.
t\Matrix.t       (Wstat: 0 Tests: 290 Failed: 0)
  TODO passed:   235, 237-238
t\MatrixComplex.t (Wstat: 768 Tests: 28 Failed: 0)
  Non-zero exit status: 3
  Parse errors: Bad plan.  You planned 38 tests but ran 28.
t\Multilarge.t   (Wstat: 768 Tests: 2 Failed: 0)
  Non-zero exit status: 3
  Parse errors: No plan found in TAP output
t\Multiroots.t   (Wstat: 768 Tests: 2 Failed: 0)
  Non-zero exit status: 3
  Parse errors: Bad plan.  You planned 11 tests but ran 2.
t\Permutation.t  (Wstat: 768 Tests: 11 Failed: 0)
  Non-zero exit status: 3
  Parse errors: Bad plan.  You planned 85 tests but ran 11.
t\SF.t           (Wstat: 768 Tests: 2 Failed: 0)
  Non-zero exit status: 3
  Parse errors: No plan found in TAP output
t\Vector.t       (Wstat: 768 Tests: 29 Failed: 0)
  Non-zero exit status: 3
  Parse errors: Bad plan.  You planned 143 tests but ran 29.
Files=58, Tests=2791, 42 wallclock secs ( 0.17 usr +  0.05 sys =  0.22
+ CPU)
Result: FAIL
Failed 9/58 test programs. 0/2791 subtests failed.
[download]

I note that Alien built and installed static libs (libgsl.a & libgslcblas.a) rather than the dll I was expecting. I don't know if that caused any problems. Running the following script:

use strict;
use warnings;
use feature 'say';
use Alien::GSL;
use Math::GSL;
use Math::GSL::SparseMatrix ':all';

say join ' ', Alien::GSL->version, Alien::GSL->install_type;
say Math::GSL::gsl_version();

my $m = gsl_spmatrix_alloc( 1, 1 );

die if gsl_spmatrix_set( $m, 0, 0, 1 );
say gsl_spmatrix_nnz( $m );
die if gsl_spmatrix_set( $m, 123 + 1 << 32, 0, 1 );
say gsl_spmatrix_nnz( $m );
die if gsl_spmatrix_set( $m, 456 + 1 << 32, 0, 1 );
say gsl_spmatrix_nnz( $m );
[download]

produced:

D:\s\Math-GSL-0.43>perl \pscrpt\math-gsl\try.pl
2.7.1 share
2.7
1
1
1
[download]

Admittedly, my hack to inc/Ver2Func.pm was perhaps unrealistically hopeful ;-)
The gsl-2.7.1 that Alien installed is definitely the only gsl library on this machine.

I think I'll write to Math::GSL queue.

Yes, I think that's an appropriate thing to do.
Good luck with it.

Cheers,
Rob

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