src/lib/clang/libllvmobject/Makefile, branch main

Completely revamp the way llvm, clang and lldb are built.

2016-08-26T22:44:22+00:00

* Bootstrap llvm-tblgen and clang-tblgen with a minimal llvm static
  library, that has no other dependencies.
* Roll up all separate llvm libraries into one big static libllvm.
* Similar for all separate clang and lldb static libraries.
* For all these libraries, generate their .inc files only once.
* Link all llvm tools (including extra) against the big libllvm.
* Link clang and clang-format against the big libllvm and libclang.
* Link lldb against the big libllvm, libclang and liblldb.

N.B.: This is work in progress, some details may still be missing.

It also heavily depends on bsd.*.mk's support for SRCS and DPSRCS with
relative pathnames, which apparently does not always work as expected.
For building llvm, clang and lldb though, it seems to work just fine.

The main idea behind this restructuring is maintainability and build
peformance.  The previous large number of very small libraries, each
with their own generated files and dependencies was slow to traverse
and hard to understand.

Possible future improvements:
* Only build certain targets, e.g. for most regular users having just
  one target will be fine.  This will shave off some build time.
* Building the big llvm, clang and lldb libraries as shared (private)
  libraries.
* Adding other components from the LLVM project, such as lld.

Update build glue for clang and the llvm/clang extras.

2016-08-19T17:55:34+00:00

First part of updating llvm/clang build glue: getting llvm-tblgen,

2015-12-31T14:39:45+00:00

clang-tblgen and clang itself built.

Minimize the number of files compiled for clang only (e.g. when neither

2015-09-06T22:02:13+00:00

WITH_CLANG_EXTRAS nor WITH_LLDB is in effect).

Update llvm/clang to r241361.

2015-07-05T22:34:42+00:00

Update Makefiles and other build glue for llvm/clang 3.7.0, as of trunk

2015-06-10T19:12:52+00:00

r239412.

Update llvm and clang library Makefiles.

2014-11-24T19:46:35+00:00

Upgrade our copy of llvm/clang to 3.4 release. This version supports

2014-02-16T19:44:07+00:00

all of the features in the current working draft of the upcoming C++
standard, provisionally named C++1y.

The code generator's performance is greatly increased, and the loop
auto-vectorizer is now enabled at -Os and -O2 in addition to -O3.  The
PowerPC backend has made several major improvements to code generation
quality and compile time, and the X86, SPARC, ARM32, Aarch64 and SystemZ
backends have all seen major feature work.

Release notes for llvm and clang can be found here:



MFC after:	1 month

Upgrade our copy of llvm/clang to 3.3 release.

2013-06-12T18:48:53+00:00

Release notes are still in the works, these will follow soon.

MFC after:	1 month

Pull in r170135 from upstream clang trunk:

2013-02-02T22:28:29+00:00

  Dont use/link ARCMT, StaticAnalyzer and Rewriter to clang when the user
  specifies not to. Dont build ASTMatchers with Rewriter disabled and
  StaticAnalyzer when it's disabled.

  Without all those three, the clang binary shrinks (x86_64) from ~36MB
  to ~32MB (unstripped).

To disable these clang components, and get a smaller clang binary built
and installed, set WITHOUT_CLANG_FULL in src.conf(5).  During the
initial stages of buildworld, those extra components are already
disabled automatically, to save some build time.

MFC after:	1 week