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segmentation fault when executing the binary produced by compiling with ldc2 on MacOS (M1)
May 18
Gravatar of Kenneth WolcottPosted by Kenneth WolcottReply
Kenneth Wolcott
Gravatar of Kenneth Wolcott


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Hi;

I downloaded

https://github.com/ldc-developers/ldc/releases/download/v1.40.1/ldc2-1.40.1-osx-arm64.tar.xz

on my MacOS M1 Mac Mini.

I'm running zsh as my default shell.

I placed the contents of the tarball at /opt/dlang

which ldc2
/opt/dlang/bin/ldc2

ldc2 -version
LDC - the LLVM D compiler (1.40.1):
  based on DMD v2.110.0 and LLVM 19.1.7
  built with LDC - the LLVM D compiler (1.39.0)
  Default target: arm64-apple-darwin24.5.0
  Host CPU: apple-m1
  http://dlang.org - http://wiki.dlang.org/LDC

I have a very short test program:

cat -n ./hello.d
     1	import std.stdio;
     2
     3	void main() {
     4	    writeln("Hello world!");
     5	}

ldc2 -v ./hello.d
binary /opt/dlang/bin/ldc2
version 1.40.1 (DMD v2.110.0, LLVM 19.1.7)
config /opt/dlang/etc/ldc2.conf (arm64-apple-darwin24.5.0)
predefs LDC all D_Version2 assert D_PreConditions D_PostConditions D_Invariants D_ModuleInfo D_Exceptions D_TypeInfo AArch64 ARM_HardFloat D_HardFloat LittleEndian D_LP64 D_PIC OSX darwin Posix CppRuntime_LLVM CppRuntime_Clang LDC_LLVM_1901 D_ObjectiveC
parse hello
importall hello
import object (/opt/dlang/bin/../import/object.d)
import core.attribute (/opt/dlang/bin/../import/core/attribute.d)
import ldc.attributes (/opt/dlang/bin/../import/ldc/attributes.d)
import core.internal.hash (/opt/dlang/bin/../import/core/internal/hash.d)
import core.internal.traits (/opt/dlang/bin/../import/core/internal/traits.d)
import core.internal.entrypoint (/opt/dlang/bin/../import/core/internal/entrypoint.d)
import core.internal.array.appending (/opt/dlang/bin/../import/core/internal/array/appending.d)
import core.internal.array.comparison (/opt/dlang/bin/../import/core/internal/array/comparison.d)
import core.internal.array.equality (/opt/dlang/bin/../import/core/internal/array/equality.d)
import core.internal.array.casting (/opt/dlang/bin/../import/core/internal/array/casting.d)
import core.internal.array.concatenation (/opt/dlang/bin/../import/core/internal/array/concatenation.d)
import core.internal.array.construction (/opt/dlang/bin/../import/core/internal/array/construction.d)
import core.internal.array.arrayassign (/opt/dlang/bin/../import/core/internal/array/arrayassign.d)
import core.internal.array.capacity (/opt/dlang/bin/../import/core/internal/array/capacity.d)
import core.internal.dassert (/opt/dlang/bin/../import/core/internal/dassert.d)
import core.internal.destruction (/opt/dlang/bin/../import/core/internal/destruction.d)
import core.internal.moving (/opt/dlang/bin/../import/core/internal/moving.d)
import core.internal.postblit (/opt/dlang/bin/../import/core/internal/postblit.d)
import core.internal.switch_ (/opt/dlang/bin/../import/core/internal/switch_.d)
import core.lifetime (/opt/dlang/bin/../import/core/lifetime.d)
import core.internal.attributes (/opt/dlang/bin/../import/core/internal/attributes.d)
import core.builtins (/opt/dlang/bin/../import/core/builtins.d)
import ldc.intrinsics (/opt/dlang/bin/../import/ldc/intrinsics.di)
import std.stdio (/opt/dlang/bin/../import/std/stdio.d)
import core.stdc.stddef (/opt/dlang/bin/../import/core/stdc/stddef.d)
import std.algorithm.mutation (/opt/dlang/bin/../import/std/algorithm/mutation.d)
import std.traits (/opt/dlang/bin/../import/std/traits.d)
import std.meta (/opt/dlang/bin/../import/std/meta.d)
import std.range.primitives (/opt/dlang/bin/../import/std/range/primitives.d)
import std.typecons (/opt/dlang/bin/../import/std/typecons.d)
import std.format.spec (/opt/dlang/bin/../import/std/format/spec.d)
import std.format.write (/opt/dlang/bin/../import/std/format/write.d)
import std.format.internal.write (/opt/dlang/bin/../import/std/format/internal/write.d)
import std.internal.attributes (/opt/dlang/bin/../import/std/internal/attributes.d)
import std.range (/opt/dlang/bin/../import/std/range/package.d)
import std.array (/opt/dlang/bin/../import/std/array.d)
import std.functional (/opt/dlang/bin/../import/std/functional.d)
import std.conv (/opt/dlang/bin/../import/std/conv.d)
import std.ascii (/opt/dlang/bin/../import/std/ascii.d)
import std.range.interfaces (/opt/dlang/bin/../import/std/range/interfaces.d)
import core.stdc.stdio (/opt/dlang/bin/../import/core/stdc/stdio.d)
import core.stdc.stdint (/opt/dlang/bin/../import/core/stdc/stdint.d)
import core.stdc.config (/opt/dlang/bin/../import/core/stdc/config.d)
import core.stdc.signal (/opt/dlang/bin/../import/core/stdc/signal.d)
import core.stdc.wchar_ (/opt/dlang/bin/../import/core/stdc/wchar_.d)
import core.atomic (/opt/dlang/bin/../import/core/atomic.d)
import core.internal.atomic (/opt/dlang/bin/../import/core/internal/atomic.d)
import core.stdc.stdarg (/opt/dlang/bin/../import/core/stdc/stdarg.d)
import core.stdc.time (/opt/dlang/bin/../import/core/stdc/time.d)
import core.sys.posix.stdc.time (/opt/dlang/bin/../import/core/sys/posix/stdc/time.d)
import core.sys.posix.sys.types (/opt/dlang/bin/../import/core/sys/posix/sys/types.d)
import core.sys.posix.config (/opt/dlang/bin/../import/core/sys/posix/config.d)
import core.sys.posix.stdio (/opt/dlang/bin/../import/core/sys/posix/stdio.d)
semantic hello
import std.exception (/opt/dlang/bin/../import/std/exception.d)
import core.stdc.errno (/opt/dlang/bin/../import/core/stdc/errno.d)
entry main ./hello.d
semantic2 hello
semantic3 hello
import std.utf (/opt/dlang/bin/../import/std/utf.d)
import core.exception (/opt/dlang/bin/../import/core/exception.d)
import core.internal.string (/opt/dlang/bin/../import/core/internal/string.d)
import std.algorithm.comparison (/opt/dlang/bin/../import/std/algorithm/comparison.d)
import core.stdc.string (/opt/dlang/bin/../import/core/stdc/string.d)
import core.internal.array.duplication (/opt/dlang/bin/../import/core/internal/array/duplication.d)
import core.internal.array.utils (/opt/dlang/bin/../import/core/internal/array/utils.d)
import core.memory (/opt/dlang/bin/../import/core/memory.d)
import core.time (/opt/dlang/bin/../import/core/time.d)
import core.sys.posix.time (/opt/dlang/bin/../import/core/sys/posix/time.d)
import core.sys.posix.signal (/opt/dlang/bin/../import/core/sys/posix/signal.d)
import core.sys.posix.sys.time (/opt/dlang/bin/../import/core/sys/posix/sys/time.d)
import core.sys.posix.sys.select (/opt/dlang/bin/../import/core/sys/posix/sys/select.d)
import core.sys.darwin.mach.kern_return (/opt/dlang/bin/../import/core/sys/darwin/mach/kern_return.d)
import core.checkedint (/opt/dlang/bin/../import/core/checkedint.d)
GC stats 7M used, 5M free, 12M total
code hello
/usr/bin/cc hello.o -o hello -L/opt/dlang/bin/../lib -lphobos2-ldc -ldruntime-ldc -Wl,-dead_strip -lpthread -lm -lobjc -target arm64-apple-macos15

file ./hello
./hello: Mach-O 64-bit arm64 executable, flags:<NOUNDEFS|DYLDLINK|TWOLEVEL|WEAK_DEFINES|BINDS_TO_WEAK|PIE|HAS_TLV_DESCRIPTORS>

./hello
zsh: segmentation fault ./hello

What did I do wrong? Or what did I fail to do?

Thanks,
Ken Wolcott

May 19
Gravatar of Richard (Rikki) Andrew CattermolePosted by Richard (Rikki) Andrew Cattermole
in reply to Kenneth Wolcott		Reply
Richard (Rikki) Andrew Cattermole
Gravatar of Richard (Rikki) Andrew Cattermole
Posted in reply to Kenneth Wolcott


Reply
Try the beta, there is a known problem for OSX in older versions, that is supposed to be fixed.

https://github.com/ldc-developers/ldc/releases/tag/v1.41.0-beta1
May 18
Gravatar of Kenneth WolcottPosted by Kenneth Wolcott
in reply to Richard (Rikki) Andrew Cattermole		Reply
Kenneth Wolcott
Gravatar of Kenneth Wolcott
Posted in reply to Richard (Rikki) Andrew Cattermole


Reply
On Sunday, 18 May 2025 at 20:59:12 UTC, Richard (Rikki) Andrew Cattermole wrote:
> Try the beta, there is a known problem for OSX in older versions, that is supposed to be fixed.
>
> https://github.com/ldc-developers/ldc/releases/tag/v1.41.0-beta1

Works great for me now.

Thanks!