Bug 262837 – [GTK][WPE] Enable libbacktrace support

• Status: RESOLVED
• Resolution: FIXED
• Component: WebKitGTK

[Philippe Normand]

The BuildStream SDK now ships libbacktrace so the support can be enabled in CMake.

[Philippe Normand]

Pull request: https://github.com/WebKit/WebKit/pull/18807

[EWS]

Committed 269037@main (343ea784deb2): <https://commits.webkit.org/269037@main>

Reviewed commits have been landed. Closing PR #18807 and removing active labels.

[Philippe Normand]

This broke https://build.webkit.org/#/builders/46

-- Could NOT find LibBacktrace (missing: LIBBACKTRACE_INCLUDE_DIR LIBBACKTRACE_LIBRARY) 
CMake Error at Source/cmake/OptionsGTK.cmake:478 (message):
  libbacktrace is required for USE_LIBBACKTRACE
Call Stack (most recent call first):
  Source/cmake/WebKitCommon.cmake:232 (include)
  CMakeLists.txt:21 (include)

Not sure what to do?

[Philippe Normand]

https://build.webkit.org/#/builders/595 and https://build.webkit.org/#/builders/68 also red

[Michael Catanzaro]

Well we either change the LTS bots' configuration to build without libbacktrace, or install libbacktrace on the bots. I don't think this is urgent; they're not test bots, so it's not like we're losing test results every hour they are turned off. Can deal with it next week IMO.

[Diego Pino]

FYI, an interruption of the WebKitGTK Ubuntu LTS build bot will likely cause an interruption of WebKit Search (https://searchfox.org/wubkat/source/) as well, because both bots build WebKitGTK with a similar configuration (--no-experimental-features plus a few features disabled). While the other bots are not critical, I  think an interruption of WebKit Search is more important since many people use it daily.

I searched for a libbacktrace package in Ubuntu and it doesn't seem to exist (neither 20.04 or 22.04). Libbakctrace is installed directly from a git repository (https://github.com/WebKit/WebKit/blob/main/Tools/buildstream/elements/sdk/libbacktrace.bst). A potential fix could be to install this package as a JHBuild dependency, but that wouldn't be enough for bots that do not use JHBuild and build only using system libraries (--no-experimental-features). In this case, those bots have to build with --USE_LIBBACKTRACE=OFF. I can change the bots settings to build with this flag disabled.