I was rebuilding on Termux and noted that mjpegtools and possibly liba52 now fails to build. Ah, I thought it was due to clang update, but apparently autoconf can cause this, when paired with c23 defaulting compiler https://www.mail-archive.com/[email protected]/msg03513.html === AC_PROG_CC now prefers C23 if available. Older code may need to be updated, as C23 has removed old-style (K&R) function definitions and declarations, now uses type-generic functions for strchr and similar functions, and has new keywords alignas, alignof, bool, constexpr, false, nullptr, static_assert, thread_local, true, typeof, typeof_unqual. ==== I'll try to prepare patch as my tablet charge back (after just less than 4 years of use it hardly compiles half of full cingg build .... even if plugged in!) not for this month's release, we already hit enough surprises for last-minute build changes like this.