[LLVMdev] Accessing/Loading a new pass

[Ben Chambers]

Ok.  So I took the source code from 1.5 for the LowerConstantExprs
pass and (hopefully) corrected all the bitrot.  It now compiles.  But
opt doesn't see it (when I run Release/bin/opt --help it doesn't show
up).  So, I copy the Transform/Hello directory and compile it as a
dynamically loaded pass.  When I run Release/bin/opt -load
Release/lib/LLVMLowerConstExps --help it shows up.  Ok.  Now I run
make install.  Now if I run opt -load Release/lib/LLVMLowerConstExps I
get an error message.  Specifically, I get:

Error opening 'lib/LLVMLowerConst': Can't open :lib/LLVMLowerConst:
dlopen(lib/LLVMLowerConst.0.dylib, 9): Symbol not found:
__ZN4llvm12FunctionPass11runOnModuleERNS_6ModuleE
  Referenced from:
/Users/benchambers/Documents/research/llvm/llvm-2.0/Release/lib/LLVMLowerConst.0.dylib
  Expected in: flat namespace

  -load request ignored.

What's going?  I'd like to get it to be built into opt (so I'd like to
figure out why it wasn't showing up when I had it in
Transforms/Scalar), but lacking that I'd like to figure out how to get
it to load into opt after I install opt.

Thanks for your help,
Ben Chambers