Re: AC_PROG_CC_C89

[Steven G. Johnson]

Harlan Stenn wrote:
> When was AC_PROG_CC_C89 introduced?

2.59c, released 2006-04-12, according to the NEWS.

> Speaking of which, how difficult would it be to list the "oldest"
> version that will support each autoconf macro?

It's just a Small Matter of Programming to write a Perl script that 1) 
greps autoconf.texi for @defmac statements to find macro definitions, 2) 
parses the NEWS file to find when the macro was officially introduced, 
and 3) collates this information with your configure.ac file to 4) 
generate an AC_PREREQ statement.  Have fun!

Steven