• James Blachly (50/50) Apr 02 2019 Have been doing dev on my mac and greatly enjoying the superior codegen
• kinke (4/9) Apr 03 2019 It's currently expected. See

James Blachly <james.blachly gmail.com> writes:

Have been doing dev on my mac and greatly enjoying the superior codegen 
of ldc2.

Recently moved to linux to test and build prior to release (of 
scientific software) and noticed a difference across platforms.

On Mac, when an assert fails, I get a nice stack trace no matter whether 
dmd2 or ldc2.

On Linux, I only get a nice stack trace with dmd2, but not with ldc2:

```
module xyzzy;

void f()
{
	assert(0);
	return;
}
int main()
{
	f();
	return 1;
}
```

dmd:
core.exception.AssertError tmp.d(5): Assertion failure
----------------
??:? _d_assertp [0x41c8ead0]
??:? void xyzzy.f() [0x41c8ea10]
??:? _Dmain [0x41c8ea1c]

ldc2:
core.exception.AssertError tmp.d(5): Assertion failure
----------------
??:? [0x56164763cc80]
??:? [0x56164764167a]
??:? [0x56164762ea4d]
??:? [0x56164762b00c]
??:? [0x56164762a876]
??:? [0x56164762a888]
??:? [0x56164762e6ef]
??:? [0x56164762e5e7]
??:? [0x56164762a904]
??:? __libc_start_main [0x7fbfdb6e2b96]
??:? [0x56164762a769]


Adding debugging info (-g) helps a bit, resolving a couple of line 
numbers and __entrypoint.

Adding -link-defaultlib-debug further resolves the rest of the source 
files and line numbers (e.g. exception.d, dwarfeh.d, dmain2.d, 
runtime.d, etc.), but does not collapse the list as with DMD *OR* ldc2 
on Mac OS.


Is my system misconfigured, or is this expected?  Why can I not resolve 
symbols?

Thanks, and thanks for such a great compiler. We are excited to be 
matching performance of C and C++ tools with idiomatic D and ldc2 =)

kinke <noone nowhere.com> writes:

On Wednesday, 3 April 2019 at 06:19:19 UTC, James Blachly wrote:
 Is my system misconfigured, or is this expected?  Why can I not 
 resolve symbols?

It's currently expected. See 
https://github.com/ldc-developers/ldc/issues/863#issuecomment-388589613 for
some background info and how you can improve it with `-L-export-dynamic`
(implicit for DMD).

 Thanks, and thanks for such a great compiler. We are excited to 
 be matching performance of C and C++ tools with idiomatic D and 
 ldc2 =)

Thx. :)