[Bug c/47384] New: Doesn't indicate failure status when it doesn't support (attiny2313A)

["choudary.omar at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47384

           Summary: Doesn't indicate failure status when it doesn't
                    support (attiny2313A)
           Product: gcc
           Version: 4.5.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: choudary.omar@gmail.com


Created attachment 23049
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23049
Patch to correct the bug

This is a bug unresolved from the previous version 4.5.1:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45261

>From the original description:
---------------------------------------------------------------
When configuration script of avr-libc tries to check if gcc has support for
Attiny2313A it doesn't indicate any failure even if it really doesn't support
it. I found about that trying to build avr toolchain using this version of gcc.

Here is a part of config.log:

configure:5374: checking if avr-gcc has support for attiny2313a
configure:5390: avr-gcc -c -mmcu=attiny2313a  conftest.c >&5
unknown MCU 'attiny2313a' specified 
...
configure:5397: $? = 0
configure:5416: result: yes (which should indicate NO)

this bug doesn't allow to build avr-libc-1.7.0 because it doesn't let 'make' to
build the code.
---------------------------------------------------------------

I had to attach a modified patch that patches version 4.5.2 instead of 4.5.1.