Andy Wingo <wi...@pobox.com> writes: > Is there anyone who compiles Guile with a compiler that does not support > C99? If so, please give platform and compiler.
Not really the question you asked, and pretty fuzzy, but an anecdote about a real situation I am aware of: In 2015--2016, there was some C code that was supposed to be very portable and a notion that using C99 features would not be a problem in any environment (as in "In 2015, it's beyond lame not to support C99".) It turned out that it was almost entirely no problem, except for one build environment that was using an old compiler, I think from MS. That compiler could handle almost all of C99, except mixed declarations and code. Based on that, I do not expect problems with guile requiring C99, especially if you refrain from mixed decls/code.
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