use Config;
if (my $libs = `pkg-config --libs libcrypto 2>nul`) {
# strawberry perl has pkg-config
$self->{LIBS} = [ $libs ];
}
else {
$self->{LIBS} = ['-llibeay32'] if $Config{cc} =~ /cl/; # msvc with ActivePerl
$self->{LIBS} = ['-leay32'] if $Config{gccversion}; # gcc
}