Bug 49479 – [Qt] Building QtWebKit fails on uClibc (0.9.31)

• Component: JavaScriptCore
• Status: RESOLVED INVALID

[Daniel Nyström]

Building QtWebKit on uClibc (0.9.31) fails like QtScript did in 4.6: http://bugreports.qt.nokia.com/browse/QTBUG-6551

Attaching i patch which adds what fixed the QtScript build.

[Daniel Nyström]

Created attachment 73778 [details]
Bugfix

[Andreas Kling]

Comment on attachment 73778 [details]
Bugfix

View in context: https://bugs.webkit.org/attachment.cgi?id=73778&action=review

> JavaScriptCore/ChangeLog:5
> +	Merged changes from QtScript which fixes missing pthread_getattr_np not available on uClibc causing build error.

Use spaces, not tabs, for indentation.
Please include the Bugzilla URL here.

[Andreas Kling]

CC'ing Geoff and Maciej per suggestion from Oliver.

[Daniel Nyström]

Created attachment 73780 [details]
Same patch but with bug URL and no tabs

[WebKit Review Bot]

Attachment 73780 [details] did not pass style-queue:

Failed to run "['WebKitTools/Scripts/check-webkit-style', '--diff-files', u'JavaScriptCore/ChangeLog', u'JavaScriptCore/runtime/Collector.cpp']" exit_code: 1
JavaScriptCore/runtime/Collector.cpp:78:  Tests for true/false, null/non-null, and zero/non-zero should all be done without equality comparisons.  [readability/comparison_to_zero] [5]
JavaScriptCore/runtime/Collector.cpp:539:  Declaration has space between type name and * in FILE *file  [whitespace/declaration] [3]
JavaScriptCore/runtime/Collector.cpp:543:  Declaration has space between type name and * in char *line  [whitespace/declaration] [3]
JavaScriptCore/runtime/Collector.cpp:543:  Use 0 instead of NULL.  [readability/null] [5]
Total errors found: 4 in 2 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Daniel Nyström]

Created attachment 73782 [details]
Fixed code styling complains

[WebKit Review Bot]

Attachment 73782 [details] did not pass style-queue:

Failed to run "['WebKitTools/Scripts/check-webkit-style', '--diff-files', u'JavaScriptCore/ChangeLog', u'JavaScriptCore/runtime/Collector.cpp']" exit_code: 1
JavaScriptCore/runtime/Collector.cpp:78:  Tests for true/false, null/non-null, and zero/non-zero should all be done without equality comparisons.  [readability/comparison_to_zero] [5]
JavaScriptCore/runtime/Collector.cpp:83:  __libc_stack_end is incorrectly named. Don't use underscores in your identifier names.  [readability/naming] [4]
Total errors found: 2 in 2 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Andreas Kling]

(In reply to comment #7)
> JavaScriptCore/runtime/Collector.cpp:78:  Tests for true/false, null/non-null, and zero/non-zero should all be done without equality comparisons.  [readability/comparison_to_zero] [5]
> JavaScriptCore/runtime/Collector.cpp:83:  __libc_stack_end is incorrectly named. Don't use underscores in your identifier names.  [readability/naming] [4]

You can ignore these complaints IMO.

[Andreas Kling]

Comment on attachment 73782 [details]
Fixed code styling complains

View in context: https://bugs.webkit.org/attachment.cgi?id=73782&action=review

> JavaScriptCore/ChangeLog:5
> +        Merged changes from QtScript which fixes missing pthread_getattr_np not available on uClibc causing build error.

This is a bit muddy. Suggestion:

==
Fix currentThreadStackBase() compilation against uClibc

uClibc doesn't have pthread_getattr_np or pthread_attr_getstack.
Patch originally from QtScript.
==

> JavaScriptCore/runtime/Collector.cpp:77
> +// versions of uClibc 0.9.31 and below do not have
> +// pthread_getattr_np or pthread_attr_getstack.

This seems a bit strange to me, since 0.9.31 is the latest version (AFAICT from uclibc.org)
Shouldn't we be doing this for *any* uClibc version, not just <= 0.9.31?

> JavaScriptCore/runtime/Collector.cpp:544
> +    size_t lineLen = 0;

We generally don't abbreviate in WebKit, "lineLength" sounds better here.

> JavaScriptCore/runtime/Collector.cpp:551
> +        if (sscanf (line, "%lx-%lx", &from, &to) != 2)

Style, remove space after sscanf.

> JavaScriptCore/runtime/Collector.cpp:557
> +            return (void *)from;

Style, remove space after void.

> JavaScriptCore/runtime/Collector.cpp:559
> +            return (void *)to;

Ditto.

[Daniel Nyström]

I think putting this patch on hold until someone can really support it is to prefer right now.

To make QtWebKit build on uClibc, just enable NPTL (only in trunk currently).

[Jocelyn Turcotte]

=== Bulk closing of Qt bugs ===

If you believe that this bug report is still relevant for a non-Qt port of webkit.org, please re-open it and remove [Qt] from the summary.

If you believe that this is still an important QtWebKit bug, please fill a new report at https://bugreports.qt-project.org and add a link to this issue. See http://qt-project.org/wiki/ReportingBugsInQt for additional guidelines.