Config::Extensions − hash lookup of which core extensions were built.
use Config::Extensions '%Extensions';
if ($Extensions{PerlIO::via}) {
# This perl has PerlIO::via built
}
The
Config::Extensions module provides a hash
%Extensions containing all the core extensions that
were enabled for this perl. The hash is keyed by extension
name, with each entry having one of 3 possible values:
dynamic
The extension is dynamically linked
nonxs
The extension is pure perl, so doesn’t need linking to the perl executable
static
The extension is statically linked to the perl binary
As all values evaluate to true, a simple "if" test is good enough to determine whether an extension is present.
All the data uses to generate the %Extensions hash is already present in the "Config" module, but not in such a convenient format to quickly reference.
Nicholas Clark <nick@ccl4.org>