[Bug bootstrap/16787] NAN constant "(0.0/0.0)" cannot be compiled by Tru64 cc

[scott dot bailey at eds dot com]

------- Additional Comments From scott dot bailey at eds dot com  2004-07-30 14:54 -------
Subject: RE:  NAN constant "(0.0/0.0)" cannot be comp
	iled by Tru64 cc

Okay, I was able to get a good bootstrap doing this:

CC="cc -ieee" CFLAGS=-O2 /usr/local/bin/make bootstrap

The semi-obvious alternative, 'CC=cc CFLAGS="-O2 -ieee" ...' does not work
because after the compiler build succeeds, the make process then attempts to
build the c++ libraries using gcc with the supplied CFLAGS and then dies
because "-ieee" is not a valid gcc argument. Trying STAGE1_CFLAGS didn't
seem to do the right thing either, and I didn't have any other decent
guesses. :-)

Is it possible to teach configure that -ieee is needed when using the native
Tru64 cc compiler? (Well, "needed" for 5.1 and, it appears, "harmless" for
earlier versions.)

I have a couple more observations that I will open separate reports on.

Cheers,

	Scott


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16787