My unfounded random guess would be that on the problematic system, Perl brings its own implementation of sprintf and the OS (or C-lib) implementation of printf differs from the Perl-supplied implementation.

I assume that if you watch the output of ./Configure closely enough you can find what it thinks about the (un)availability of sprintf and how it replaces those.

In reply to Re: [XS] Weird behaviour on some Linux systems by Corion
in thread [XS] Weird behaviour on some Linux systems by syphilis

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