Problem:
You want to use the LLVM Gold linker plugin but LLVMgold.so can’t be found.
17
Feb
2013
LLVM
09
Feb
2013
Compiling LevelDB as LLVM binary on Linux
Some time ago I wrote a guide on how to compile and install LevelDB on Linux.
Recently I’m desperately trying to get into LLVM and a tutorial series on how to use LLVM with C/C++ is coming shortly.
As I’m using LevelDB in many of my projects I’d like a way of generating a LLVM IR (intermediate representation) of the LevelDB C++ source – I could link a LLVM program to the native binary, but in order to profit from LLVMs features I suppose using IRs for as many dependencies as possible is the way to go.
Generally there are two ways to go:
- Use the g++ LLVM backend
- Use clang++
I usually tend to use clang++ for LLVM tasks because even with colorgcc and some recent improvements in gcc error message generation I prefer the clang++ error messages, even if I have way more experience with gcc error messages. Additionally the g++ with LLVM backend does seem to have some bugs, including interpreting -emit-llvm as -e -m -i …, plus recent distribution versions don’t work too well with the LLVM gold plugin and it has proved difficult to tell GCC reliably that it shall use llvm-ld as linker.