Where a source tree is complete with lld, lldb and polly, it may not be possible to use cmake to configure build scripts if the host compiler it not capable of compiling these sub-projects.  This change makes it possible to first build a bootstrap clang compiler when can then be used to build a complete llvm toolchain.  An example bootstrap build sequence could be as follows:

$ mkdir bootstrap
$ cd bootstrap
$ cmake -G 'Unix Makefiles'
        -DCMAKE_BUILD_TYPE:STRING=Release
        -DCMAKE_PREFIX_PATH:STRING=$(pwd)
        -DLLVM_TARGETS_TO_BUILD:STRING=host
        -DLLVM_INCLUDE_TOOLS:STRING=bootstrap-only
        ../source
$ make clang  # build clang only for host

$ cd ..
$ export CC=$(realpath bootstrap/bin)/clang
$ export CXX=$(realpath bootstrap/bin)/clang++

$ mkdir final
$ cd final
$ cmake -G 'Unix Makefiles' ../source
$ make all check-all

llvm-svn: 184924

I will remove the V1 version as soon as I change clang in the next commit.

llvm-svn: 184914

llvm-svn: 184853

llvm-svn: 184826

Removes the last use of PathV1.h in llvm-ar.

llvm-svn: 184630

Although in reality the symbol table in ELF resides in a section, the
standard requires that there be no more than one SHT_SYMTAB. To enforce
this constraint, it is cleaner to group all the symbols under a
top-level `Symbols` key on the object file.

llvm-svn: 184627

The full ELFYAML::Section isn't needed.

llvm-svn: 184626

Just add them to the vector of section headers like the rest of the
section headers.

llvm-svn: 184624

llvm-svn: 184623

The improperly aligned section content in the output was causing
buildbot failures. This should fix them.

Incidentally, this results in a simpler and more robust API for
ContiguousBlobAccumulator.

llvm-svn: 184621

llvm-svn: 184599

Previously we unconditionally enforced that section references in
symbols in the YAML had a name that was a section name present in the
object, and linked the references to that section. Now, permit empty
section names (already the default, if the `Section` key is not
provided) to indicate SHN_UNDEF.

llvm-svn: 184513

llvm-svn: 184508

Instead, just have 3 sub-lists, one for each of
{STB_LOCAL,STB_GLOBAL,STB_WEAK}.

This allows us to be a lot more explicit w.r.t. the symbol ordering in
the object file, because if we allowed explicitly setting the STB_*
`Binding` key for the symbol, then we might have ended up having to
shuffle STB_LOCAL symbols to the front of the list, which is likely to
cause confusion and potential for error.

Also, this new approach is simpler ;)

llvm-svn: 184506

llvm-svn: 184486

llvm-svn: 184484

After this patch, the ELF file produced by
`yaml2obj-elf-symbol-basic.yaml`, when linked and executed on x86_64
(under SysV ABI, obviously; I tested on Linux), produces a working
executable that goes into an infinite loop!

llvm-svn: 184469

llvm-svn: 184468

One of the key things that the YAML format abstracts over is the use of
section numbers for referencing sections. Instead, textual section names
are used, which yaml2obj then translates into appropriate section
numbers. (Technically ELF doesn't care about section names (only section
numbers), but since this is a testing tool, readability counts).

This simplifies using section names as symbolic references in various
parts of the code. An upcoming commit will use this to allow symbols to
reference sections.

llvm-svn: 184467

With this we can remove the last use of PathV1 from llvm-ar.cpp.

llvm-svn: 184464

llvm-svn: 184460

This commit completely removes what is left of the simplify-libcalls
pass.  All of the functionality has now been migrated to the instcombine
and functionattrs passes.  The following C API functions are now NOPs:

  1. LLVMAddSimplifyLibCallsPass
  2. LLVMPassManagerBuilderSetDisableSimplifyLibCalls

llvm-svn: 184459

llvm-svn: 184457

llvm-svn: 184456

llvm-svn: 184455

Use that in llvm-ar.cpp to replace a use of sys::PathWithStatus.

llvm-svn: 184450

Matches gnu ar behavior.

llvm-svn: 184448

Original message:

Don't include directory names in archives.

This matches the behavior of both gnu and os x versions of ar.

llvm-svn: 184423

This reverts commit 184420.
Investigating the bot failures.

llvm-svn: 184421

This matches the behavior of both gnu and os x versions of ar.

llvm-svn: 184420

llvm-svn: 184418

llvm-svn: 184416

llvm-svn: 184415

llvm-svn: 184413

llvm-svn: 184412

This is a basic implementation - we still don't have any support (that I
know of) for dumping DWARF expressions in a meaningful way, so the
location information itself is just printed as a sequence of bytes as we
do elsewhere.

llvm-svn: 184361

llvm-svn: 184359

llvm-svn: 184355

llvm-svn: 184354

Store the individual fields we need instead of a sys::FileStatus.

llvm-svn: 184353