configure.ac: fix -Wimplicit-function-declaration

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Closed thesamesam closed 2 years ago

thesamesam commented 2 years ago

Clang 16 makes -Wimplicit-function-declaration an error by default. We need to include for exit().

Signed-off-by: Sam James sam@gentoo.org

mgieseki commented 2 years ago

Thank you for the info and the patch.

thesamesam commented 2 years ago

Thank you!