This commit was once part of "Bug 4234: Use the Firefox Update Process
for Tor Browser.".
However, some parts of it were not needed for Base Browser and some
derivative browsers.
Therefore, we extracted from that commit the parts for Tor Browser
legacy, and we add them back to the patch set with this commit.

Differential Revision: https://phabricator.services.mozilla.com/D187876

On clang trunk, lld recently changed its behavior wrt linking wasm
files, whereas it now always puts a module name in the output, while
it didn't before. This leads wasm2c to use that module name in a way
that is not compatible with the rlbox code. Thus we force wasm2c to
use the module name it was defaulting to before.

Differential Revision: https://phabricator.services.mozilla.com/D186828

This moves the creation of both rlbox.wasm.c and rlbox.wasm.h to
pre-compile, which allows static-analysis to create both files (but more
importantly the .h) without also compiling rlbox.wasm.c, which takes
forever.

Differential Revision: https://phabricator.services.mozilla.com/D180173

When rustc generates its dependency file, it takes into account current
version of the codebase. If an update of the code then happens, with,
say an ipdl file being removed, the corresponding .h is no longer
generated and make rightfully complains about missing dependency.

Allow this kind of transition by providing a dummy rule for each
dependency generated by rustc.

Differential Revision: https://phabricator.services.mozilla.com/D178617

Depends on D176264

Differential Revision: https://phabricator.services.mozilla.com/D176265

Depends on D176263

Differential Revision: https://phabricator.services.mozilla.com/D176264

Instead of duplicating the flag location, use a single place to pass
either lto or lto=fat.

Differential Revision: https://phabricator.services.mozilla.com/D178841

When rustc generates its dependency file, it takes into account current
version of the codebase. If an update of the code then happens, with,
say an ipdl file being removed, the corresponding .h is no longer
generated and make rightfully complains about missing dependency.

Allow this kind of transition by providing a dummy rule for each
dependency generated by rustc.

Differential Revision: https://phabricator.services.mozilla.com/D178617

This combines the effect of full LTO for C/C++ code with rust cross LTO
capability.

Differential Revision: https://phabricator.services.mozilla.com/D172266

This combines the effect of full LTO for C/C++ code with rust cross LTO
capability.

Differential Revision: https://phabricator.services.mozilla.com/D172266

Differential Revision: https://phabricator.services.mozilla.com/D177123

Bug 1829050 - Enable STL wrapping (and thus infallible new) for wasm-sandboxed code. r=firefox-build-system-reviewers,shravanrn,andi

Differential Revision: https://phabricator.services.mozilla.com/D175981

Differential Revision: https://phabricator.services.mozilla.com/D176949

Backed out changeset e06349a5b0f2 (bug 1829050) for causing build bustages in rlbox_wasm2c_sandbox.hpp

Bug 1829050 - Enable STL wrapping (and thus infallible new) for wasm-sandboxed code. r=firefox-build-system-reviewers,shravanrn,andi

Differential Revision: https://phabricator.services.mozilla.com/D175981

Bug 1829050 - Enable STL wrapping (and thus infallible new) for wasm-sandboxed code. r=firefox-build-system-reviewers,shravanrn,andi

Differential Revision: https://phabricator.services.mozilla.com/D175981

Differential Revision: https://phabricator.services.mozilla.com/D176567

Differential Revision: https://phabricator.services.mozilla.com/D176805