buildlist invocations are slow and can occur in parallel since the
underlying program obtains a lock on the modified file.
Moving the XPT-related buildlist invocation from the serial libs tier to
the parallel misc tier decreased my no-op build time on OS X from 43.5s
to 37.0s.
--HG--
extra : rebase_source : 7d274024c401b1ecfbc771424a69eb487808fcbf
The installation rule for EXTRA_JS_MODULES and EXTRA_PP_JS_MODULES
became unused after b961ba8f0892 (bug 1044162). We remove the dead code.
--HG--
extra : rebase_source : 40adf7514d15ae4ba5bbfe3ac101061657aac841
This used to be necessary to avoid the conflicting names between import
libraries and static libraries, but that's now prevented by the whole
moz.build machinery.
There are, sadly, many combinations of linkage in use throughout the tree.
The main differentiator, though, is between program/libraries related to
Gecko or not. Kind of. Some need mozglue, some don't. Some need dependent
linkage, some standalone.
Anyways, these new templates remove the need to manually define the
right dependencies against xpcomglue, nspr, mozalloc and mozglue
in most cases.
Places that build programs and were resetting MOZ_GLUE_PROGRAM_LDFLAGS
or that build libraries and were resetting MOZ_GLUE_LDFLAGS can now
just not use those Gecko-specific templates.
Ever since bug 969164, the js build system, when building gecko (not when
building standalone) uses a autoconf-js.mk file for its config.
One of the suboptimal ways we have to retrigger builds when the build
configuration changes (changes to e.g. configure.in can do that) is to
make most things depend on autoconf.mk. Which unfortunately doesn't
account for the fact the js/src subdirectory uses a different file.
In practice, this means that some classes of changes to the js build
system, not accompanied with toplevel build system changes may no
trigger the corresponding rebuilds in the js subtree on incremental
builds.
Currently, when there is both an expandlibs descriptor and an actual static
library, expandlibs picks the static library. This has the side effect that
if there are object files in the static library that aren't directly used,
they're dropped when linking, even when they export symbols that would be
exported in the final linked binary.
In most cases in the code base, files are not dropped that way. The most
notable counter-example is xpcomglue, where actually not dropping files
leads to link failure because of missing symbols those files reference
(yes, that would tend to say the glue is broken in some way).
On the opposite side, there is mozglue, which does have both a descriptor
and a static library (the latter being necessary for the SDK), and that
linking as a static library drops files that shouldn't be dropped (like
jemalloc). We're currently relying on -Wl,--whole-archive for those files
not to be dropped, but that won't really be possible without much hassle
in a world where mozglue dependencies live in moz.build land.
Switching expandlibs to use descriptors when they exist, even when there
is a static library (so, the opposite of the current behavior) allows to
drop -Wl,--whole-archive and prepare for a better future. However, as
mentioned, xpcomglue does still require to be linked through the static
library, so we need to make it a static library only.
To achieve that, we make NO_EXPAND_LIBS now actually mean no expandlibs
and use that to build the various different xpcomglues.
OS_LIBS for libraries that are not part of the gecko tree, EXTRA_LIBS for
libraries, such as NSPR, that are in the tree, but are not handled by
moz.build just yet. Those EXTRA_LIBS may also come from a system library.
However, in cases where the expanded variables are always empty for the
in-tree case, OS_LIBS is used (as for, e.g. MOZ_ZLIB_LIBS). OS_LDFLAGS is
used exclusively for non-library linker flags.
Always pass EXTRA_LIBS before OS_LIBS on linker command lines.
Forbid EXTRA_DSO_LDOPTS, SHARED_LIBRARY_LIBS and LIBS in Makefiles.
Before making top-level traverse js/src moz.build files, there was a need to
distinguish between top-level traversing e.g. top-level moz.build or
config/moz.build and js/src traversing them. With a single traversal of both
moz.build sets, we now only need to distinguish between js standalone builds
and gecko builds.
There is still, however, a need to distinguish between top-level vs. js/src
configure runs on gecko builds to make them subconfigure icu and libffi from
top-level instead of js/src in js standalone builds, or when choosing to make
js/src's config.status do something when run or not.
Every directory with a jar.mn now has JAR_MANIFESTS defined in its
moz.build file.
We also removed the may_skip special consideration of jar.mn files
because this information is now available during tier traversal by the
reader courtesy of the variables being present in moz.build files.
--HG--
extra : rebase_source : 21049b15e6bd9cf65b0805ccaccc4ba5aae93c98
extra : amend_source : 0b1ea866d725beef92d37c6f6d475369ac002e19
Gregory Szorc
Mike Hommey
Wes Kocher
Jan Beich
Ed Morley
Jacek Caban
Ian Neal
Nathan Froyd
Neil Rashbrook
Steve Fink
Mukilan Thiyagarajan
Ryan VanderMeulen
Mike Shal
Ehsan Akhgari
Ted Mielczarek
EKR
Sylvestre Ledru
Dan Minor
Dan Gohman
Seth Fowler