autoconf + newer gcc barfs

GCC CVS now outputs a multiline version string:

[teg(at)halden teg]$ gcc --version
gcc (GCC) 3.1 20020115 (Red Hat Linux Rawhide 3.1-0.18)
Copyright (C) 2002 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[teg(at)halden teg]$

It also complains about multiline literals being deprecated, like

#define CC_VERSION "FOO

BAR
"

Autoconf thinks these warnings (which it will get for pretty much all
tests, as this is in confdefs.h) means the test failed.

One way to work around this is:

--- postgresql-7.2rc1/configure.in.multiline Wed Jan 23 12:36:53 2002
+++ postgresql-7.2rc1/configure.in Wed Jan 23 12:37:26 2002
@@ -297,7 +297,7 @@

# Create compiler version string
if test x"$GCC" = x"yes" ; then
- cc_string="GCC `${CC} --version`"
+ cc_string="GCC `${CC} --version|head -n 1`"
else
cc_string=$CC
fi

--
Trond Eivind Glomsrød
Red Hat, Inc.