llvm dev - Feb 2013 - [LLVMdev] Problem linking class to a pass in a loadable module

Check out the bug report at http://llvm.org/bugs/show_bug.cgi?id=13144  and try
adding KEEP_SYMBOLS := 1 to tools/opt/Makefile like the OP suggests.
Good luck.
----- Original Message -----
From: Raphael Ernani Rodrigues
Sent: 02/28/13 05:59 PM
To: LLVM Developers Mailing List
Subject: Problem linking class to a pass in a loadable module

Dear LLVMers, I have a class X that represents a set of Value* in a specific
way. That class is stored in two files: X.cpp and X.h The class X works
perfectly in a pass that I already have. However, I need to use that class in
some other passes, but I don't want to have a copy of X.cpp and X.h in every
pass folder. I've tried to do the following: - put X.h in the folder
<llvm_root>/include/lllvm/Analysis - put X.cpp in the folder
<llvm_root>/lib/Analysis - go to <llvm_root> and execute
"make", to compile everything again, with my new files - change the
includes of my passes to replace #include "X.h" by #include
"llvm/Analysis/X.h" - compile my pass again Until this point
everything works fine. Although everything compiles without any warnings, I
can't run my pass after I change the location of the source code of the
class X. When I use the command: raphael at ubuntu:~/$ opt -f -load
myPassModule.so -myPass test.bc I get the following error message: opt: symbol
lookup error: /ho!
 st/Raphael/bin/llvm-3.2/Release+Asserts/bin/../lib/myPassModule.so: undefined
symbol: _ZN4llvm5GraphC1Ei I know that this error message means that X.h was
successfully linked to myPass, but when I call opt, opt can't find the
actual implementation of the class and the methods declared in the header file.
Does anybody know what I did wrong or what I should do to make this work?
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