[oe] [OE-core] [RFT] GCC 8.1

[Martin Jansa]

My initial tests show couple issues, but usually caused by other changes in
that branch, not the gcc-8 itself.

1) strace-4.22 from
http://git.openembedded.org/openembedded-core-contrib/commit/?h=kraj/gcc-8&id=af33a8b721cc9caebd3f5226b4c5903f666ab654
fails to build with ptest enabled (it builds with 4.20 version if I revert
this change)
../../strace-4.22/tests/inject-nf.c: In function 'main':
../../strace-4.22/tests/inject-nf.c:86:1: error: r7 cannot be used in asm
here
 }
 ^
Makefile:6313: recipe for target 'inject-nf.o' failed
make: *** [inject-nf.o] Error 1
make: Leaving directory 'strace/4.22-r0/build/tests'

2) glibc with obsolete rpc disabled from:
http://git.openembedded.org/openembedded-core-contrib/commit/?h=kraj/gcc-8&id=0cd820424d4bdb5cc68e7503e09a0359fd21150a
causes busybox's mount applet to fail building:
util-linux/mount.c:252:11: fatal error: rpc/rpc.h: No such file or directory
 # include <rpc/rpc.h>
           ^~~~~~~~~~~
compilation terminated.
make[1]: *** [util-linux/mount.o] Error 1
make: *** [util-linux] Error 2

3) grub and grub-efi fails to build with gcc8:
In file included from ../grub-2.02/grub-core/partmap/gpt.c:26:
../grub-2.02/include/grub/gpt_partition.h:79:1: error: alignment 1 of
'struct grub_gpt_partentry' is less than 8 [-Werror=packed-not-aligned]
 } GRUB_PACKED;
 ^
In file included from ../grub-2.02/grub-core/disk/ldm.c:26:
../grub-2.02/include/grub/gpt_partition.h:79:1: error: alignment 1 of
'struct grub_gpt_partentry' is less than 8 [-Werror=packed-not-aligned]
 } GRUB_PACKED;
 ^
..
../grub-2.02/grub-core/fs/btrfs.c:186:1: error: alignment 1 of 'struct
grub_btrfs_inode' is less than 4 [-Werror=packed-not-aligned]
 } GRUB_PACKED;
 ^

4) iotivity fails to build with gcc8:
service/resource-encapsulation/src/common/primitiveResource/unittests/PrimitiveResourceTest.cpp:
In lambda function:
service/resource-encapsulation/src/common/primitiveResource/unittests/PrimitiveResourceTest.cpp:164:30:
error: 'value' is not captured
                 ocRep[KEY] = value;
                              ^~~~~

5) nativesdk-libxcrypt fails to build (not sure which change caused this,
it build OK with sumo since the -std=gnu99 addition.
../git/crypt-sunmd5.c:189:13: error: 'snprintf' output may be truncated
before the last format character [-Werror=format-truncation=]
             "$" CRYPT_ALGNAME "," ROUNDS "%u$%s$",
             ^~~

6) couple internal components which usually fail to build with gcc8,
because of more strict warnings + Werror.

I didn't get very far in testing, because our old kernel fails to build
with gcc8 and there are some other issues caused by other master changes.
But it doesn't look too bad (in my small test, lets see what bitbake world
will show), thanks a lot for new gcc.

Cheers,





On Sat, May 5, 2018 at 2:26 AM, Khem Raj <raj.khem at gmail.com> wrote:

> Hi All
>
> As you might have noticed that gcc 8.1 was released this week, I am
> calling out for some testing help on testing branch so we can weed out
> issues you might see in your setups. so if you have your
> builders idling over weekend, then you know what they can do this weekend
> :)
>
> Highlighted changes are
>
> https://gcc.gnu.org/gcc-8/changes.html
>
> and porting doc is
>
> https://gcc.gnu.org/gcc-8/porting_to.html
>
> The branch is here
>
> http://git.openembedded.org/openembedded-core-contrib/log/?h=kraj/gcc-8
>
> Its uptodate on top of current master oe-core
>
> May fourth be with you !!
>
> Cheers!
>
> -Khem
> --
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