Created attachment 1933444 [details] libtnc-c99.patch I tried to port the package to C99, but there are too many issues. Instead, we need to build this package in C89 mode. The beginnings of a patch are attached, but more changes would be needed to complete the port.
Ran into bug 2154693 because the -std=gnu89 wasn't injected into the Perl XS module build at first.