[arch-general] [arch-dev-public] Test repository with gcc7

Eli Schwartz eschwartz93 at gmail.com
Thu May 25 13:35:09 UTC 2017

On 05/23/2017 06:36 PM, Eli Schwartz wrote:
> On 05/23/2017 04:04 PM, Jan Alexander Steffens wrote:
>> No, this particular bug should have been fixed since 52.0...
>> In any case, you can try CXXFLAGS+=" -fno-lifetime-dse
>> -fno-delete-null-pointer-checks -fno-schedule-insns2" ; these were the
>> optimization steps that used to cause trouble with GCC 6.
> I did say it was only a quick google, so probably it's a totally
> different issue that also causes the general category of UI brokenness.
> I'll try this when I get a chance then.
> ...
> There and on bugzilla.mozilla.org and on the LFS firefox page, I've seen
> the suggestion that firefox 53 still breaks on gcc7 with -O3 though, and
> should be fixed with ac_add_options --enable-optimize="-O2".

Yeah, -fno-lifetime-dse -fno-delete-null-pointer-checks
-fno-schedule-insns2 did nothing, but ac_add_options
--enable-optimize="-O2" fixed it at the cost of a 13 MB bigger install
footprint and I suppose general lack of optimization.

Eli Schwartz

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