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Bug#880962: mips*: "gcc --help=target --help=optimizers" busyloops forever



Control: forwarded -1 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82880

Hi,

On 06/11/17 18:07, James Cowgill wrote:
> On 06/11/17 12:11, Adrian Bunk wrote:
>> Package: gcc-7
>> Version: 7.2.0-12
>> Severity: serious
>> Control: affects -1 src:amanda
>>
>> https://buildd.debian.org/status/package.php?p=amanda&suite=sid
>>
>> ...
>> checking for gcc flag -fstrict-aliasing... 
>> E: Build killed with signal TERM after 360 minutes of inactivity
>>
>>
>> Testcase:
>>
>> (sid_mips-dchroot)bunk@minkus:~$ gcc --help=target --help=optimizers  
> 
> Bisected to this commit, but I don't know how far that helps us.
> Probably some mips specific option blows up.

I've filed a bug upstream with some more details. Indeed a mips
optimization pass being registered twice caused the infinite loop, but I
currently think the mips specific code is being called incorrectly and
there needs to be a generic fix.

I posted a workaround patch in the upstream bug report.

Thanks,
James

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