bootstrap/6598: configure identifies old/broken gcc as gcc and passes unknown options

[sdack@anitesystems.de]

>Number:         6598
>Category:       bootstrap
>Synopsis:       configure identifies old/broken gcc as gcc and passes unknown options
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue May 07 11:06:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Sven Dack
>Release:        gcc-3.0.4
>Organization:
>Environment:
m88k-motorola-sysv4
>Description:
Motorola ships their boxes with SVR4 and a master piece of compiler suite which is basically a GNU cc with their own assembler and linker but a broken 'cc' frontend. The compiler identifies itself as the GNU compiler through the builtin defines but doesn't accept all command line options. They even scratched --help and --version :-(. '-g' and '-O' works, -Wall doesn't which gets complained about during the bootstrap.
Now the problem is, that the usual configure script identifies this as a gcc but I think it rather shouldn't.

It actually is a gcc-2.2.2 or 2.4.5. Not very clear. It does compile things.
>How-To-Repeat:
Apply for a job at our company and make gcc run on m88k.
>Fix:
Have a configure option which disables checking of 'cc' beeing a GNU cc (and rather assume the worst).
>Release-Note:
>Audit-Trail:
>Unformatted: