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* build: add recursion limit for AX_RECURSIVE_EVALDavid Lamparter2024-01-271-31/+6
| | | | | | The autoconf version can just loop forever, abort instead. Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
* build: add ax_recursive_eval.m4David Lamparter2024-01-271-0/+56
As found in the GNU autoconf archive https://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git Signed-off-by: David Lamparter <equinox@opensourcerouting.org>