# PDL interface to GSL differentation routines
# Makefile.PL for a package defined by PP code.
use ExtUtils::MakeMaker;
PDL::Core::Dev->import();
my $msg = undef;
my $forcebuild=0;
my $skip = 0;
# this Makefile uses get_gsl_libs which is defined in
# the parent Makefile.PL
sub gsl_diff_links_ok {
my($lib,$inc) = @_;
return defined($lib) && defined($inc) &&
trylink 'gsl diff libraries',
<< 'EOI',
#include <math.h>
#include <gsl/gsl_math.h>
#include <gsl/gsl_diff.h>
double f (double x, void * params)
{
return pow (x, 1.5);
}
EOI
<< 'EOB', $lib, $inc;
gsl_function F;
double result, abserr;
F.function = &f;
F.params = 0;
gsl_diff_central (&F, 2.0, &result, &abserr);
gsl_diff_forward (&F, 0.0, &result, &abserr);
gsl_diff_backward (&F, 0.0, &result, &abserr);
EOB
}
if (defined $PDL::Config{WITH_GSL} && $PDL::Config{WITH_GSL}==0) {
$msg = "\n Will skip build of PDL::GSL::DIFF on this system \n";
$skip = 1;
} elsif (defined $PDL::Config{WITH_GSL} && $PDL::Config{WITH_GSL}==1) {
print "\n Will forcibly try and build PDL::GSL::DIFF on this system \n\n";
$forcebuild=1;
}
if (($skip && !$forcebuild) ||
!gsl_diff_links_ok($GSL_libs, $GSL_includes)) {
warn "trying to force GSL build but link test failed\n".
"\t -- aborting GSL build\n" if $forcebuild;
$msg ||=
"\n GSL Libraries not found... Skipping build of PDL::GSL::DIFF.\n";
warn $msg . "\n";
$msg =~ s/\n//g;
write_dummy_make( $msg );
return;
} else {
print "\n Building PDL::GSL::DIFF.",
"Turn off WITH_GSL if there are any problems\n\n";
}
@pack = (["gsl_diff.pd",DIFF,PDL::GSL::DIFF]);
%hash = pdlpp_stdargs_int(@::pack);
$hash{INC} .= " $GSL_includes";
push @{$hash{LIBS}},$GSL_libs;
WriteMakefile(%hash);
sub MY::postamble {
pdlpp_postamble_int(@::pack);
} # Add genpp rule