icc bug on test-frexp-nolibm

[Eric Blake]

I'm running out of time today to get to the bottom of this, so if anyone
else wants to help out, great.  If not, I'll see if I can resume testing
tomorrow and get a minimal test case that exposes the compiler bug, as
well as try and isolate ways to work around it.

I'm on a Linux x86_64 machine with icc (ICC) 10.0 20070426.

$ ./gnulib-tool --with-tests --create-testdir --dir=testdir frexp-nolibm
$ cd testdir
$ ./configure CC=icc CFLAGS=
$ make check
...
../../gltests/test-frexp.c:103: assertion failed
/bin/sh: line 5:  9201 Aborted                 (core dumped) EXEEXT=''
srcdir='../../gltests' ${dir}$tst
FAIL: test-frexp-nolibm
PASS: test-isnand-nolibm
PASS: test-isnanf-nolibm
PASS: test-isnanl-nolibm
PASS: test-math
PASS: test-signbit
===================
1 of 6 tests failed
===================
$ make clean
$ make check CFLAGS=-g
...
==================
All 6 tests passed
==================

I hate it when a heisenbug disappears because of the mere act of adding
debugging hooks. :(

-- 
Eric Blake   address@hidden    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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