469171 - SpiderMonkey should do two-stage build

Status: RESOLVED FIXED

(Firefox Build System :: General, defect)

Description

[Jim Blandy :jimb]

We would like to be able to use the SpiderMonkey shell in the SpiderMonkey build process.  We would like to be able to assemble special-purpose bytecode, generate boilerplate functions, and so on, using JavaScript as our scripting language.

This entails using two passes.  We would build the first pass with various features disabled, to produce a shell that we can use in the second pass.

Probably this means creating a subdirectory of js/src for each pass, whose makefile includes the important stuff from some js/src/ .mk file, uses VPATH to find the sources in js/src, as they are now, and builds SpiderMonkey and the shell with appropriate options.

Comment 1

[Benjamin Smedberg]

To summarize a bit of conversation in #jsapi: the goal is to build a host jsshell, not threadsafe, and use that in the build process for the target jsshell. We discussed briefly whether to use the traditional host+target build system support that we already have in place, or whether to use an entire separate objdir which can be configured for the host.

Comment 2

[Jim Blandy :jimb]

This is fixed by bug 563728.