[PATCH] Use a non-empty test program to test ability to link

[Sandra Loosemore]

On 2/10/20 3:58 PM, Joseph Myers wrote:
> On Sat, 8 Feb 2020, Sandra Loosemore wrote:
> 
>>>> BTW, I did run autoconf in every subdirectory that contains a
>>>> configure.ac,
>>>> but it appears only libstc++-v3 actually uses this test; all the other
>>>> regenerated configure scripts were unchanged.
>>>
>>> There's some problem with that regeneration, then; every directory where
>>> configure.ac mentions GCC_NO_EXECUTABLES should have a resulting change (I
>>> tested regenerating in libgcc/ with this patch applied and got such a
>>> change, for example).
>>
>> Hmmm.  I just tried that again and got nothing.  Do I have to do something
>> other than just run "autoconf" in that directory?  I'm always confused by
>> anything involving configuration changes.  :-(
> 
> Just running autoconf in that directory should suffice to get configure
> regenerated with the change.

Hmmm, I tried again and saw that autoconf didn't even touch the 
timestamp on the existing configure file, but I was able to force it to 
regenerate the files by removing the old ones first.  Is this version of 
the patch OK to check in?

-Sandra

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