llvm example fib.ll not working on ubuntu

[johncblacker]

I installed the llvm-runtime on my wsl2 liinux machine and tried the fib example -> fib.ll; however, it failed to run with the following output: fib.ll:6:41: warning: ptr type is only supported in -opaque-pointers mode @._stdout = private unnamed_addr global ptr null ^ lli: lli: fib.ll:6:41: error: expected type @._stdout = private unnamed_addr global ptr null

Is there something I'm doing wrong? Admittedly, I haven't read the docs, just tried the example as shown in the README. ^

[arshajii]

Hi @johncblacker, Codon uses LLVM 15 which has opaque pointers enabled by default. I'm guessing you're probably using an older LLVM version that's still using typed pointers.

[johncblacker]

I built llvm from the exaloop repository...shouldn't that work?

[johncblacker]

OK, let's take a step back, if you don't mind? I built llvm from the exaloop repository. So, then I perform these steps: 1.) llc fib.ll # supposed to compile the ll to fib.s 2.) as fib.s # assemble/link to a.out? 3.) chmod +x a.out 4.) ./a.out # errors cannot execute binary file.

If I do this: 5.) ld -o fib a.out 6.) I get these errors: ld: warning: cannot find entry symbol _start; defaulting to 0000000000401000 ld: a.out: in function main': fib.py:(.text+0xe): undefined reference to seq_init' ld: fib.py:(.text+0x13): undefined reference to seq_stdout' ld: fib.py:(.text+0x4a): undefined reference to seq_str_int' ld: fib.py:(.text+0x58): undefined reference to seq_print_full' ld: fib.py:(.text+0x6a): undefined reference to seq_print_full' ld: fib.py:(.text+0x95): undefined reference to seq_print_full' ld: a.out:(.eh_frame+0x13): undefined reference to seq_personality'

Clearly I'm out of my league here and am not understanding how to take the fib.ll file and turn it into an executable on ubuntu... Can you help?

[johncblacker]

I'm using the one from the exaloop repository.

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On Jul 18, 2023, 8:50 AM, at 8:50 AM, "A. R. Shajii" @.***> wrote:

Hi @johncblacker, Codon uses LLVM 15 which has opaque pointers enabled by default. I'm guessing you're probably using an older LLVM version that's still using typed pointers.

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[inumanag]

Did you build the tools as well (DLLVM_BUILD_TOOLS=ON)? By default it is OFF.

If which llc points to a directory that is not part of our LLVM, you will also need to set PATH or manually point to proper llc (e.g., /path/to/exaloop/llvm/bin/llc ...).

[Elfsong]

I have the same question.