Request assistance resolving linker error: Undefined symbol(s) for architecture x86_64
anonymouse
anony at mouse.com
Wed Aug 3 06:01:43 UTC 2022
On Wednesday, 3 August 2022 at 05:04:08 UTC, H. S. Teoh wrote:
> On Wed, Aug 03, 2022 at 04:28:57AM +0000, anonymouse via
> Digitalmars-d-learn wrote:
>> How do I go about tracking down what's causing the following
>> error:
>>
>> ```
>> Undefined symbols for architecture x86_64:
>> "__D3std8internal6memory12__ModuleInfoZ", referenced from:
>> __D3loxQe12__ModuleInfoZ in dlux.o
>> ld: symbol(s) not found for architecture x86_64
>> clang: error: linker command failed with exit code 1 (use -v
>> to see
>> invocation)
>> ```
>>
>> I'm not explicitly calling anything in std.internal.memory so
>> not sure how to resolve. Thanks.
> [...]
>
> This is often a sign of version mismatch between libraries and
> compiler. Did you recently upgrade your compiler? Did you
> accidentally install two versions of the standard library and
> the new compiler is mistakenly picking up the old library?
Interesting... no I only have one version of DMD installed on this
computer (v2.100.0) and it's never been updated.
> Maybe try also recompiling your project from clean slate just
> in case your build process is picking up stale binaries for
> whatever reason. If you have object files compiled with the old
> version of the compiler still lying around, and they get picked
> up when compiling with the new compiler, it would cause link
> errors like the above.
This project aims at learning how compilers work. I'm simply
adapting Robert Nystrom's code from his book [Crafting
Compiler](http://www.craftinginterpreters.com/scanning.html). The
source tree currently looks like this:
```
lox
|
+ lox.d
|
+ main.d
|
+ scanner.d
|
+ token.d
|
+ tokentype.d
```
My entire build process comprises issuing the command:
```
dmd -of=dlux lox/*
```
I've tried using -J, -I, and moving main to the current working
directory but all these result in the same error.
--anonymouse
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