Dlang LLVM ERROR: Program used external function which could not be resolved

Question

main.d

import std.stdio;

void    main()
{
    writeln("Hello World !!!");
}

when i compile and execute it is work perfectly

But when i try

ldc2 -output-ll main.d
lli main.ll

LLVM ERROR: Program used external function '_d_throw_exception' which could not be resolved!

I try in c

#include<stdio.h>

void    main()
{
  printf("Hello World !!!");
}

and

clang -S -emit-llvm foo.c

lli foo.ll

it is work !!

Why in Dlang does not work when i compile width ldc ???

score 1 · Answer 1 · answered Jun 15 '17 at 16:11

    ldc2 -output-ll -betterC main.d

    lli -load /usr/lib/libphobos2-ldc.so.72 main.ll

    ./main

output -> Hello World !!!

It is because

I need to disable all the functionality requiring runtime

http://forum.dlang.org/post/pqujluaxxmtfnoofqkje@forum.dlang.org Thanks every one and David Nadlinger

score 0 · Accepted Answer · answered Jun 14 '17 at 16:51

0

Because the cruntime is avilable to lli. Whereas the druntime is not. If you were to link the druntime and phobos into lli or load it at startup it would work.

answered Jun 14 '17 at 16:51

Stefan K

16

Stanislav Pankevich · Answer 3 · 2017-06-15T15:47:07.620

0

LLVM ERROR: Program used external function '_d_throw_exception' which could not be resolved!

You need to figure out which dynamic library has this symbol and link it dynamically to your program using lli -load /path/to/your/library.{so,dylib} ... foo.ll.

I am not a D developer so I don't what library you need. To find a library look at your Dlang distrubution's libraries. As Stefan K said it you probably need a library responsible for D runtime.

Generally if you are missing any symbols, on Linux system you can use

readelf --syms somelib.so

or

objdump --dynamic-syms somelib.so

Based on this command you can write a routine using find that will traverse through the folder with libraries you suspect to have the symbols you are missing, smth like:

find path-to-dlang-libs-folder -type f ! -name "*.so" -exec objcdump --dynamic-libs -- {} + | grep _start___minfo

You might need to tweak this command to work on Linux though.

edited Jun 15 '17 at 15:47

answered Jun 14 '17 at 17:21

Stanislav Pankevich

11,044
8
69
129

lli -load /usr/lib/libdruntime-ldc-debug.so.72 -load /usr/lib/libphobos2-ldc-debug.so.72 main.ll no work :( i forgot something ? LLVM ERROR: Program used external function '__start___minfo' which could not be resolved! – Barre_k Jun 15 '17 at 14:49
Which operating system do you have? – Stanislav Pankevich Jun 15 '17 at 15:39
Linux unknown 4.11.3-1-ARCH #1 SMP PREEMPT Sun May 28 10:40:17 CEST 2017 x86_64 GNU/Linux – Barre_k Jun 15 '17 at 15:43
1

@Barre_k, I have updated my answer with more details. Maybe this will help. – Stanislav Pankevich Jun 18 '17 at 21:28

score 0 · Answer 4 · answered Jun 15 '17 at 14:57

0

 lli -load /usr/lib/libdruntime-ldc-debug.so.72 -load /usr/lib/libphobos2-ldc-debug.so.72 main.ll

and i have

LLVM ERROR: Program used external function '__start___minfo' which could not be resolved!

answered Jun 15 '17 at 14:57

Barre_k

23
4

Dlang LLVM ERROR: Program used external function which could not be resolved

4 Answers4