On Wed, Oct 11, 2023, at 9:34 AM, Evgeny Grin wrote: > On 11.10.2023 16:29, Bob Friesenhahn wrote: >> The problem is that Autoconf is defeating the recipient's freedom to >> select the compilation settings used. >> >> The person who is compiling the software should be able to specify >> the parameters to use used. > > It works, actually. ./configure CC=gcc CFLAGS=-std=c89 > > C99 check would fail, compiler would be accepted as C89-compatible. This only works if both configure.ac and all the Makefiles have been written "correctly". I put "correctly" in quotes because, yes, it *is* how you should write them, and it *is* what you get if you aren't trying to do anything complicated -- but if you *do* need to do something complicated, it is very easy to break this property by accident and without noticing. And I don't think everything you need to do to avoid breaking it is documented, so we can't even claim that we warned people. zw
