Hello Guile Devel, I pushed a git branch: wip-modernize-autotools.
It removes some obsolete tests by presuming we at least have a C89-compliant C library. It also uses LT_INIT for libtool, and removes some macros that autoconf has deprecated. I thought about continuing on by presuming that we have a C99-compliant C library, but, I figured I'd stop at C89/C90 and touch base first. Since most of these header and function tests are for ancient or odd architectures, I tested it on Cygwin and MinGW. (Note that the main branch compiles on MinGW but doesn't run. So I only tested that it compiles.) Let me know what you think. Thanks, Mike Gran
