Bug 43191

Summary: [Qt] Treat warnings as errors by default for gcc
Product: WebKit Reporter: Csaba Osztrogonác <ossy>
Component: Tools / TestsAssignee: Nobody <webkit-unassigned>
Severity: Normal CC: abecsi, allan.jensen, benjamin, eric, hausmann, kenneth, laszlo.gombos, tonikitoo
Priority: P3 Keywords: Qt, QtTriaged
Version: 528+ (Nightly build)   
Hardware: All   
OS: All   
Bug Depends on: 20721, 37916, 38045, 43192, 43193, 43350, 43353, 43355, 43356, 43358, 43359, 43360, 43412, 43413, 43698, 43876, 43920, 43963, 44466, 44468, 44593, 44672, 44843, 44855, 45246, 45301, 45373, 45384, 67778, 67928, 83584    
Bug Blocks:    
Description Flags
enable -Werror on x86/Linux/GCC platforms none

Description Csaba Osztrogonác 2010-07-29 08:39:34 PDT
I create this bug because of discussion in https://bugs.webkit.org/show_bug.cgi?id=30958 .

I agree with Laszlo, we should treat warnings as errors 
to avoid breaking other platforms accidentally.

The main goal of this patch is adding -Werror to QMAKE_CFLAGS,
but it depends on fixing dozens of warning. First we can focus
on x86-linux and x86-windows platforms and then ARM-linux and 
other platforms.
Comment 1 Csaba Osztrogonác 2010-07-29 08:42:40 PDT
(In reply to comment #9 in https://bugs.webkit.org/show_bug.cgi?id=30958)
> My only concern would be the extra pressure to fix these warnings to keep the bot green. CCing Ossy to see what he think.
> A somewhat relaxed version of this - which I think we should do - is to start treating warnings as errors by default (at least on platforms where this is realistic like i386) but have a provision (e.g. environment variable) not to do this for the build bot.
> This will force most developers to look into the warning but does not put extra pressure on the bot.

I absolutely agree with Laszlo, it is a good way to solve this bug.
Comment 2 Csaba Osztrogonác 2010-08-02 10:05:29 PDT
*** Bug 37916 has been marked as a duplicate of this bug. ***
Comment 3 Csaba Osztrogonác 2010-09-08 01:55:33 PDT
Created attachment 66858 [details]
enable -Werror on x86/Linux/GCC platforms

I think it's time to enable -Werror on x86/Linux/GCC platforms
after https://bugs.webkit.org/show_bug.cgi?id=45373 fixed.

The next steps will be Windows/GCC and ARM/Linux/GCC after all warnings fixed.
Comment 4 Andreas Kling 2010-09-08 03:35:29 PDT
Comment on attachment 66858 [details]
enable -Werror on x86/Linux/GCC platforms


I always feel silly when the EWS slaps me about some warning that my own machine knew about but wasn't loud enough.
Comment 5 Csaba Osztrogonác 2010-09-08 03:38:25 PDT
Comment on attachment 66858 [details]
enable -Werror on x86/Linux/GCC platforms

cq-, because I will land manually after 
https://bugs.webkit.org/show_bug.cgi?id=45373 fixed
Comment 6 Csaba Osztrogonác 2010-09-08 04:35:11 PDT
Comment on attachment 66858 [details]
enable -Werror on x86/Linux/GCC platforms

Clearing flags on attachment: 66858

Committed r66972: <http://trac.webkit.org/changeset/66972>
Comment 7 Csaba Osztrogonác 2010-09-08 09:54:19 PDT
(In reply to comment #6)
> (From update of attachment 66858 [details])
> Clearing flags on attachment: 66858
> Committed r66972: <http://trac.webkit.org/changeset/66972>
And a buildfix landed in http://trac.webkit.org/changeset/66990 ,
because linux-g++ is true when you build for maemo inside sbox,
but we didn't want to enable -Werror for it now.

I didn't run into this issue, because linux-g++ is false 
for ARM cross compiling, but linux-arm-g++ is true.
Comment 8 Laszlo Gombos 2010-09-08 14:49:24 PDT
Very nice, thanks for all this work !