Re: Gentlemen, start your engines...

[<br...@ph...>]

Ethan Merritt wrote:

> What is the correct way to have ./configure figure this out?

There are two possibilities:

1) one that goes very much against the grain of what autoconf was 
designed for: a switch/case on (part of) the canonical platform name, as 
figured out by config.guess.

2) the fully autoconf-ish approach: check whether -ieee improves the 
behaviour of a test program, by compiling and running it twice.

3) the middle way: compile a test souce with an #ifdef __ALPHA__  or so, 
and if it's there, add -ieee to the CFLAGS.

For an examples of technique 3), see the existing macros in m4/*.m4.