Releace candidate 2.8.0.rc-Cascades

[Pete Chou]

Hello list,

Release branch `release_28' is out! Please refer to the ChangeLog for the detailed information. Bug report and patch are welcome! :)

https://code.google.com/p/mclinker/source/list?name=release_28

2014-07-04 Chinyen Chou <pete...@gmail.com>

* Executive Summary:

1. Migrate to LLVM 3.5svn (r209960 or later).

2. Phase out the old `ld.mcld'.

3. Support identical code folding (ICF).

4. Improve relaxation design.

* Command Line Options and Building System:

1. Support `make unittests'.

2. Support --icf=[none|all|safe] and --print-icf-sections.

3. Support --print-gc-sections.

4. Support --exclude-libs.

5. Support -u/-undefined.

* Target Backends:

1. ARM: Support R_ARM_THM_JUMP8 relocation.

2. ARM: Add functions to check if linking Thumb only or Thumb2 objects,

  and support getting max branch offset from attribute data.

* Identical code folding:

1. Add class IdenticalCodeFolding to support --icf=[none|all|safe]

2. Support safe icf on ARM, X86, and X86_64 targets.

3. Separate LDFileFormat::TEXT from LDFileFormat::Regular for folding

  candidate collection.

4. Add LDFileFormat::Folded to represent the folded sections.

5. Add TargetLDBackend::isSymbolPreemptible for icf.

6. Add TargetLDBackend::mayHaveUnsafeFunctionPointerAccess and

  Relocator::mayHaveFunctionPointerAccess for safe icf.

7. Import cxa_demangle.cpp from libcxxabi for C++ ctors and dtors folding.

* Relaxation:

1. Support searching stub in a backward direction.

Thanks,

Pete