Le 12/05/2017 à 04:10, Carsten Mattner via arch-general a écrit :

On Fri, May 12, 2017 at 1:22 AM, Hao Zhang via arch-general wrote:

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On 2017-05-10 20:19, Bartłomiej Piotrowski wrote:

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I found some time today to make a test build of the latest GCC. I tested some "simple" projects like nginx and libtorrent-rasterbar and they do build, while MariaDB fails on linking for me.

Let me know if you encounter any problems, I'd rather not break too much by pushing it to repos. [gcc7] SigLevel = Required Server = https://pkgbuild.com/~bpiotrowski/gcc7

No i686, embrace the future!

Bartłomiej Hi Bartłomiej,

I found MariaDB fails on linking because /usr/bin/gcc-ar segfaults whenever it runs with absolute path. I have filed an upstream bug report: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80717 I'm not testing or complaining, to be clear, but have a simple question.

I can't find it now but when the new gcc version scheme was decided I remember that .0 releases were meant to be RC, but there's one thing I don't remember.

Will 7.1 be the first tested and stable gcc7 release or is it 7.0.1 under the new scheme?

7.1 normally.

On Monday, May 15, 2017 5:33:05 AM MDT Bartłomiej Piotrowski wrote:

On 2017-05-12 03:22, Hao Zhang via arch-general wrote:

...

On 2017-05-10 20:19, Bartłomiej Piotrowski wrote:

...

I found some time today to make a test build of the latest GCC. I tested some "simple" projects like nginx and libtorrent-rasterbar and they do build, while MariaDB fails on linking for me.

Let me know if you encounter any problems, I'd rather not break too much by pushing it to repos.

[gcc7] SigLevel = Required Server = https://pkgbuild.com/~bpiotrowski/gcc7

No i686, embrace the future!

Bartłomiej

Hi Bartłomiej,

I found MariaDB fails on linking because /usr/bin/gcc-ar segfaults whenever it runs with absolute path. I have filed an upstream bug report: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80717

Hao

Thanks for spending time on it and reporting upstream! Really appreciate it.

I also heard that retroarch fails, but I couldn't reproduce it locally. I will push new gcc to [testing] this week.

Bartłomiej Hi Bartłomiej,

Thank you very much! I also tried building retroarch and have no problem building it with GCC 7. Now we found the reason why MariaDB fails to build, there are two ways of fixing it and I have verified both methods work: 1) patch gcc to remove line 197-203 from gcc-ar.c (these lines are not present in gcc 6.3.1) 2) make a symlink of the files ar, nm and ranlib in /usr/local/bin. A more serious problem with GCC 7 is the ABI changes in libgfortran (major version bumped from 3 to 4). Many packages depending on libgfortran such as python-numpy needs to be recompiled. Some binary packages such as MATLAB just refuse to run with libgfortran7 and these binary packages cannot be recompiled... Hao

On 05/15/2017 07:33 AM, Bartłomiej Piotrowski wrote:

I will push new gcc to [testing] this week.

Terrible things happened to my firefox and thunderbird-gtk2 builds when I used what turned out to be a testing-enabled build chroot to build them. The builds succeeded but the UI elements blinked in and out constantly and it was uncooperative switching tabs... basically everything fritzed. No idea why... but disabling testing and `pacman -Syuu` allowed the rebuilds to work as expected. Quickly googling gets me this, which looks like the same issue: https://bugzilla.redhat.com/show_bug.cgi?id=1422532 -- Eli Schwartz

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". -- Eli Schwartz

On 05/23/2017 02:42 PM, Eli Schwartz via arch-general wrote:

Terrible things happened to my firefox and thunderbird-gtk2 builds when I used what turned out to be a testing-enabled build chroot to build them.

The builds succeeded but the UI elements blinked in and out constantly and it was uncooperative switching tabs... basically everything fritzed. No idea why... but disabling testing and `pacman -Syuu` allowed the rebuilds to work as expected.

Quickly googling gets me this, which looks like the same issue: https://bugzilla.redhat.com/show_bug.cgi?id=1422532

Hopefully this will get resolved. I filed a bug with mozilla against the failure to respect GTK+2 themes in the 45.8esr to 52 move. (they won't fix). I'll stick with 45.8esr until this is worked out, 52 and GTK+3 on my laptop simply looks horrible (despite trying every dark GTK+3 theme I could find). -- David C. Rankin, J.D.,P.E.