[OE-core] [PATCH][morty] gcc6: Upgrade to 6.4.0 (latest stable series release)

[Andre McCurdy]

On Mon, Mar 5, 2018 at 2:45 AM, Martin Jansa <martin.jansa at gmail.com> wrote:
> On Mon, Mar 05, 2018 at 01:51:59AM -0800, Andre McCurdy wrote:
>> On Mon, Mar 5, 2018 at 1:19 AM, Martin Jansa <martin.jansa at gmail.com> wrote:
>> > Thanks Andre!
>> >
>> > I've seen another failure probably caused by this gcc upgrade in morty-next:
>> >
>> > python-matplotlib triggers ICE:
>> >
>> > src/_png.cpp: In function 'void init_png()':
>> > src/_png.cpp:497:25: warning: variable '_png' set but not used
>> > [-Wunused-but-set-variable]
>> >      static _png_module* _png = NULL;
>> >                          ^~~~
>> > src/_png.cpp: In member function 'Py::Object _png_module::read_png(const
>> > Py::Tuple&)':
>> > src/_png.cpp:272:1: internal compiler error: Segmentation fault
>> >  _png_module::read_png(const Py::Tuple& args)
>> >  ^~~~~~~~~~~
>> > Please submit a full bug report,
>> > with preprocessed source if appropriate.
>> > See <http://gcc.gnu.org/bugs.html> for instructions.
>> > error: command 'i586-oe-linux-gcc' failed with exit status 1
>> > ERROR: Function failed: do_compile (log file is located at
>> > python-matplotlib/1.1.0-r1/temp/log.do_compile.15213)
>> >
>> > I'll try to build it with Khem's and Andre's patches only to eliminate
>> > hjl/indirect/gcc-6-branch/master changes.
>> >
>>
>> FWIW, I see the same error with my OE 2.2 + gcc 6.4.0 based distro.
>> The ICE only happens if I build with -O2 though (the build is clean
>> with -Os, which I use by default).
>>
>> In case it's useful to anyone, my branch of morty with a gcc 6.4.0 backport is:
>>
>>   git clone https://github.com/lgirdk/openembedded-core.git --branch oe22b
>
> You're right with 14 cherry-picks from your branch instead of 6.4
> upgrade from Juro
>
> 8e6e2e3 gcc6: enable FL_LPAE flag for armv7ve cores
> 756e8f2 gcc6: Fix unaligned STRD issue on ARM
> 33e717b tcmode-default.inc: update GCCVERSION 6.3 -> 6.4
> bb03bfd gcc6: Upgrade to 6.4
> cf3be39 gcc-runtime: Disable libitm on riscv
> 8e0fa79 gcc-6.3: Backport patch to fix ICE on ARM
> a77c5c4 gcc-6.3.inc: Use ucontext_t not struct ucontext.
> c5376cb gcc-6.3: backport fix of check for empty string in ubsan.c
> 322dd7f gcc: Remove unused patch
> 07e888e gcc: Fix CVE-2016-6131 in libiberty
> 8c5205d gcc-6: Add fix for missing no-PIE flags
> cf3da73 gcc-6: Sync gcc stddef.h with musl stddef.h
> 953f3e2 gcc6: Upgrade to 6.3.0
> 60ded51 Revert "gcc-6.2: backport fix of check for empty string in ubsan.c"
>
> I can still reproduce it with -O2 and doesn't fail with -Os.

Already seems to have been reported in gcc bugzilla:

  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82492
  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82264