search for: llvm_start_block_profiling

Hi, all I have a question about how to profile program with LLVM. When I tried to compile the instrumented version of program after using "-insert-block-profiling", I got error complaining " undefined reference to `llvm_start_block_profiling'. I found that there is a "runtime"directory in llvm source directory but in the Makefile, it said llvm gcc 4 and above already included the libraries. I was using llvm gcc 4. Why would I still get the error? Thanks Haifeng

Hi Haifeng > I have a question about how to profile program with LLVM. When I tried > to compile the instrumented version of program after using "-insert- > block-profiling", I got > error complaining " undefined reference to > `llvm_start_block_profiling'. > > I found that there is a "runtime"directory in llvm source directory > but in the Makefile, it said llvm gcc 4 and above already included > the libraries. I was using llvm > gcc 4. Why would I still get the error? I experienced the same error on Mac OS X when us...

Thanks Chris, but the method you mentioned is not what I want. Maybe I didn't make it clear. As you said, /runtime/libprofile is runtime library for the following function. llvm_start_func_profiling llvm_start_block_profiling llvm_start_basic_block_tracing llvm_trace_basic_block And those above functions can be inserted into basic block etc for getting profile. However, those functions are wroten by C/C++ which just statistic some data. What I want is to write a Pass in external library. You know for the Pass,...