[LLVMdev] notes on llvmc2

[Mikhail Glushenkov]

Hi Holger,

first of all, thanks for your feedback.

> I already compiled llvm, but llvm-gcc was still compiling. Now I tried the new
llvmc2:
> 
> $ llvmc2 -opt -v main.c
> llvm-g++ -c -x c main.c -o /tmp/llvm_KeApik/main.bc -emit-llvm
> llvmc2: Can't find program 'llvm-g++'
> 
> 
> * after this, the directory /tmp/llvm_KeApik was not removed

Strange, I couldn't reproduce this. What system are you using? 

> * why calling "llvm-g++ -x c" and not "llvm-gcc" ?
> ...
> $ llvmc2 -opt -v main.c
> llvm-g++ -c -x c main.c -o /tmp/llvm_084K2D/main.bc -emit-llvm
> opt /tmp/llvm_084K2D/main.bc -o /tmp/llvm_084K2D/main.bc-LXq9ea
> opt: error opening '/tmp/llvm_084K2D/main.bc-LXq9ea': file exists!
> Use -f command line argument to force output

Thanks for reporting these issues, I've fixed them in SVN.

> $ rm -rf /tmp/llvm_*

BTW, you didn't have to do this, llvmc always creates a unique temporary
directory for each invocation.