Add generic support for different forms of paths in moz.build:
'/topsrcdir/relative/paths'
'srcdir/relative/paths'
'!/topobjdir/relative/paths'
'!objdir/relative/paths'
This drops the use of UserString for performance reasons, which required
going around with a meta class.
This code has been commented since it landed, and enabling it requires
adding the proper conditionals around all non_unified_sources in gyp
configurations, which is a daunting task. OTOH, the commented code is
already outdated (it would need updates to work) and the related code
that is not commented gets in the way of upcoming changes, so remove
it.
This helps upcoming changes, and relieves backends from path resolution.
This has the side effect of chaning the order of some unified sources,
which consequently breaks nsTextFormatter because it declares snprintf
methods after nsStringAPI #defines it.
With TemplateContexts keeping the name of the associated template, and the
Gyp context being declared as a TemplateContext, it is now possible to know
the equivalent of IS_GYP_DIR just by looking at the template name.
Add .rs as a recognized file extension in SOURCES.
Propagate that through to the Makefile backend and add a dependency
generated and an explicit rule to call $(RUSTC) to compile them.
rustc builds static libraries, not obj files. At least, if one
asks it to output an obj file, I'm not clear how to get all the
compiler-specific runtime libraries the code will expect to link
to. Therefore we generate a static library for each rust source
file (which must be a complete crate for the time being) and link
that. Because of the extension it ends up on the LIBS line in the
the corresponding .desc file.
Note that the static library does still depend on some system
libraries, e.g. -ldl -lpthread -lm on linux. Gecko already
links to all of those, so we don't keep track of it here.
Should we need to add explicit linkage for other targets,
rustc does print a list to stderr which can be parsed.
Formerly, running |./mach test image/| would result in running a number of devtools tests
in addition to running tests under the image/ subdirectory. With this change, only tests
under the image/ directory would be run. Note that ./mach test animations or similar will
still run a variety of tests across the tree, because this input does not match a directory.
mach dispatch makes separate, independent calls to construct build
system state. Part of this resolution is determining the object
directory. For environments without an object directory defined, we must
execute config.guess to determine the object directory. This redundant
execution of config.guess can result in significant execution overhead.
Before this patch, `mach help` with no mozconfig took ~1.5s on my OS X
machine. After this patch, it goes down to ~0.750s. On Windows, the
difference is even more pronounced, with execution time dropping from
8.5s to 0.930s.
Now that moz.build can see EXTRA_*COMPONENTS and NO_JS_MANIFEST, we can
move some logic from rules.mk (executed every build) to moz.build's
emitter.py (executed only at build-backend time).
