Clang 16 warns on -Wstrict-prototypes in preparation for C23 which can among other things, lead to some configure tests silently failing/returning the wrong result.
Fixes this error:
-ignoreme: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes] +ignoreme: error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes] main ()
For more information, see LWN.net  or LLVM's Discourse , gentoo-dev@ , or the (new) c-std-porting mailing list .
 https://lwn.net/Articles/913505/  https://discourse.llvm.org/t/configure-script-breakage-with-the-new-werror-implicit-function-declaration/65213  https://archives.gentoo.org/gentoo-dev/message/dd9f2d3082b8b6f8dfbccb0639e6e240  hosted at lists.linux.dev.