maintainer-feedback requested: [Bug 255311] mail/thunderbird fails to build with LTO option enabled

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Bugzilla Automation <bugzilla at FreeBSD.org> has asked freebsd-gecko (Nobody)
<gecko at FreeBSD.org> for maintainer-feedback:
Bug 255311: mail/thunderbird fails to build with LTO option enabled
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255311



--- Description ---
OS: 13.0-STABLE stable/13-ddb7a5056, GENERIC kernel, amd64

mail/thunderbird (78.10.0) fails to build if the LTO option is enabled.
Build/installation was attempted from Ports (not poudriere or portmaster).

thunderbird-78.10.0 builds just fine with LTO disabled.

This is similar to bug #253539 and bug #253771 for www/firefox.

I created a log file, but the linker error messages are identical to the output
posted in bug #253539. I can nevertheless attach all or a snippet of the failed
build log if requested.

On this same system, www/firefox (88.0,2) builds just fine with LTO enabled,
but for now it's necessarily to disable LTO in order to build latest
mail/thunderbird.

I do not have any compiler flags set in /etc/make.conf, and am using the
standard LLVM 11.0.1 compiler suite bundled with FreeBSD 13.0.