16:35 danfe 

Our LLVM packages typically built without dump support (which is meant for
developers, not for actual LLVM-based products), and ``void dump() const''
sprinkled across LLVM header files are just prototypes.  However, this is
not the case with ``$localbase/llvm$ver/include/llvm/Support/CFGUpdate.h'',
where it contains some actual code:

    #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
      LLVM_DUMP_METHOD void dump() const { print(dbgs()); }
    #endif

This, in turn, results in the linker failure due to "undefined reference to
llvm::cfg::Update<llvm::BasicBlock*>::dump() const".  Avoid this by defining
-DNDEBUG when compiling two files which end up having a reference to dump().

This is a prerequisite to enable building with LLVM backend.

 

08:58 danfe 

- Resurrect and update to version 3.0.1 which is based on Qt5
  now and officially requires C++11-capable compiler
- Disable LLVM backend and Python support for the moment, due
  to outstanding build issues
- Respect WITH_DEBUG when passing `-g' option to the compiler

 

01:45 danfe 

Do not unconditionally use SSE4.1 code: not just it makes it less portable,
it might crash on CPUs that do not support those instructions, with SIGILL.