1669442 - [Linux] Fails to build with gcc and --enable-lto

Status: RESOLVED FIXED

(Firefox Build System :: General, defect)

Description

[Martin Stránský [:stransky] (ni? me) (PTO, back on Feb 17)]

When gcc, PGO and --enable-lto is used, Firefox fails to build. plugin-container fails to link with:

/usr/bin/g++ -std=gnu++17 -o ../../dist/bin/plugin-container [...]
/usr/bin/ld: warning: libmozgtk.so, needed by ../../toolkit/library/build/libxul.so, not found (try using -rpath or -rpath-link)
/usr/bin/ld: ../../toolkit/library/build/libxul.so: undefined reference to gtk_file_chooser_set_do_overwrite_confirmation' /usr/bin/ld: ../../toolkit/library/build/libxul.so: undefined reference togtk_main_iteration'
[...]

The link chain is libxul.so -> libmozgtk_stub.so -> libmozgtk.so, but there isn't a build dependency between libmozgtk_stub.so and libmozgtk.so.

As there's no dependency between libxul.so/libmozgtk.so in the build system on the second phase of PGO build only libmozgtk_stub.so so at widget/gtk/mozgtk/stub directory is built and widget/gtk/mozgtk/gtk3 and widget/gtk/mozgtk/gtk2 are missing.

when I manually trigger linking of widget/gtk/mozgtk/gtk3, libmozgtk.so is created and plugin-container is linked correctly.

Mike, how is this handled with clang? Do you allow undefined dependencies for libxul.so or so?

Thanks.

Comment 1

[Mike Hommey [:glandium]]

Wow, this is race condition that has been possible since bug 1573566 but apparently never happened until now, I'm baffled.

Comment 2

[Mike Hommey [:glandium]]

Attachment: Bug 1669442 - Fix dependency between libxul and mozgtk after bug 1573566.

Bug 1573566 moved libxul from toolkit/library to toolkit/library/build,
and that should be reflected in config/recurse.mk.

It's amazing the race condition hasn't caused problems earlier than now.

Comment 3

[Mike Hommey [:glandium]]

Martin, can you confirm it works for you?

Comment 4

[Martin Stránský [:stransky] (ni? me) (PTO, back on Feb 17)]

Yes, that works.
Thanks.

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/4489f33bf652
Fix dependency between libxul and mozgtk after bug 1573566. r=andi,dmajor

Comment 6

[Atila Butkovits]

https://hg.mozilla.org/mozilla-central/rev/4489f33bf652