Silence the implicit signed/unsigned conversion warning.


git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@211912 91177308-0d34-0410-b5e6-96231b3b80d8
Revert the LSDA change to scan_eh_tab.

This commit reverts the LSDA-related change in r211745.

The r211745 adds a new argument to scan_eh_tab(), i.e. lsda.
However, IMO, calling _Unwind_GetLanguageSpecificData() directly in
scan_eh_tab() was more intuitive and reduces several function call
to _Unwind_GetLanguageSpecificData() in __cxx_personality_v0().


git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@212037 91177308-0d34-0410-b5e6-96231b3b80d8
Fix a warning about undeclared call to abort().


git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@212232 91177308-0d34-0410-b5e6-96231b3b80d8
Add a cmake build system.

Will add support for tests with lit in a later patch.
This does not yet support building the unwinder in src/Unwind.


git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@212286 91177308-0d34-0410-b5e6-96231b3b80d8
Add lit configs for libcxxabi tests.

This makes running libcxxabi tests on Linux _much_ easier.
Also adds a check-libcxxabi target to cmake.