The dmd package on NixOS doesn't work anymore in their master branch.
They must have changed something in the C environment or something and I don't have a clue what's going on.
Building the package succeeds but when I try to build with the newly build binary I get all sorts of linker errors.
Maybe someone can give me some hints?
Here you see a small piece of the output if I try to build a simple hello world with it.

dmd hello.d
hello.o: In function `_D3std5stdio__T7writelnTAyaZQnFNfQjZv':
hello.d:(.text._D3std5stdio__T7writelnTAyaZQnFNfQjZv[_D3std5stdio__T7writelnTAyaZQnFNfQjZv]+0x46): undefined reference to `_D3std5stdio4File17lockingTextWriterMFNfZSQBoQBnQBk17LockingTextWriter'
hello.d:(.text._D3std5stdio__T7writelnTAyaZQnFNfQjZv[_D3std5stdio__T7writelnTAyaZQnFNfQjZv]+0x57): undefined reference to `_D3std5stdio4File6__dtorMFNfZv'
hello.d:(.text._D3std5stdio__T7writelnTAyaZQnFNfQjZv[_D3std5stdio__T7writelnTAyaZQnFNfQjZv]+0xa4): undefined reference to `_D3std5stdio4File17LockingTextWriter10__aggrDtorMFNeZv'
hello.o:(.data.DW.ref.__dmd_personality_v0+0x0): undefined reference to `__dmd_personality_v0'
hello.o: In function `_D3std9exception__T12errnoEnforceTiVAyaa83_2f6e69782f73746f72652f783977667070677a30377a676b733979666e37633936393635776d726c3078642d646d644275696c642d322e3037392e312f696e636c7564652f64322f7374642f737464696f2e64Vmi2877ZQHqFNfiLQHhZi':
hello.d:(.text._D3std9exception__T12errnoEnforceTiVAyaa83_2f6e69782f73746f72652f783977667070677a30377a676b733979666e37633936393635776d726c3078642d646d644275696c642d322e3037392e312f696e636c7564652f64322f7374642f737464696f2e64Vmi2877ZQHqFNfiLQHhZi[_D3std9exception__T12errnoEnforceTiVAyaa83_2f6e69782f73746f72652f783977667070677a30377a676b733979666e37633936393635776d726c3078642d646d644275696c642d322e3037392e312f696e636c7564652f64322f7374642f737464696f2e64Vmi2877ZQHqFNfiLQHhZi]+0x20): undefined reference to `_D3std9exception14ErrnoException7__ClassZ'
hello.d:(.text._D3std9exception__T12errnoEnforceTiVAyaa83_2f6e69782f73746f72652f783977667070677a30377a676b733979666e37633936393635776d726c3078642d646d644275696c642d322e3037392e312f696e636c7564652f64322f7374642f737464696f2e64Vmi2877ZQHqFNfiLQHhZi[_D3std9exception__T12errnoEnforceTiVAyaa83_2f6e69782f73746f72652f783977667070677a30377a676b733979666e37633936393635776d726c3078642d646d644275696c642d322e3037392e312f696e636c7564652f64322f7374642f737464696f2e64Vmi2877ZQHqFNfiLQHhZi]+0x5b): undefined reference to `_D3std9exception14ErrnoException6__ctorMFNeAyaQdmZCQBxQBwQBp'
hello.d:(.text._D3std9exception__T12errnoEnforceTiVAyaa83_2f6e69782f73746f72652f783977667070677a30377a676b733979666e37633936393635776d726c3078642d646d644275696c642d322e3037392e312f696e636c7564652f64322f7374642f737464696f2e64Vmi2877ZQHqFNfiLQHhZi[_D3std9exception__T12errnoEnforceTiVAyaa83_2f6e69782f73746f72652f783977667070677a30377a676b733979666e37633936393635776d726c3078642d646d644275696c642d322e3037392e312f696e636c7564652f64322f7374642f737464696f2e64Vmi2877ZQHqFNfiLQHhZi]+0x63): undefined reference to `_d_throwdwarf'
hello.o: In function `_D3std5stdio4File17LockingTextWriter__T3putTyaZQiMFNfyaZv':

Thanks in advance
Thomas

Am 04.05.2018 um 22:27 schrieb Thomas Mader:
> [...]
Here is a demangled version of what you posted:

dmd hello.d
hello.o: In function `@safe void
std.stdio.writeln!(immutable(char)[]).writeln(immutable(char)[])':
hello.d:(.text.@safe void
std.stdio.writeln!(immutable(char)[]).writeln(immutable(char)[])[@safe
void
std.stdio.writeln!(immutable(char)[]).writeln(immutable(char)[])]+0x46):
undefined reference to `@safe std.stdio.File.LockingTextWriter
std.stdio.File.lockingTextWriter()'
hello.d:(.text.@safe void
std.stdio.writeln!(immutable(char)[]).writeln(immutable(char)[])[@safe
void
std.stdio.writeln!(immutable(char)[]).writeln(immutable(char)[])]+0x57):
undefined reference to `@safe void std.stdio.File.__dtor()'
hello.d:(.text.@safe void
std.stdio.writeln!(immutable(char)[]).writeln(immutable(char)[])[@safe
void
std.stdio.writeln!(immutable(char)[]).writeln(immutable(char)[])]+0xa4):
undefined reference to `@trusted void
std.stdio.File.LockingTextWriter.__aggrDtor()'
hello.o:(.data.DW.ref.__dmd_personality_v0+0x0): undefined reference to
`__dmd_personality_v0'
hello.o: In function `@safe int std.exception.errnoEnforce!(int,
"/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/include/d2/std/stdio.d",
2877uL).errnoEnforce(int, lazy immutable(char)[])':
hello.d:(.text.@safe int std.exception.errnoEnforce!(int,
"/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/include/d2/std/stdio.d",
2877uL).errnoEnforce(int, lazy immutable(char)[])[@safe int
std.exception.errnoEnforce!(int,
"/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/include/d2/std/stdio.d",
2877uL).errnoEnforce(int, lazy immutable(char)[])]+0x20): undefined
reference to `std.exception.ErrnoException.__Class'
hello.d:(.text.@safe int std.exception.errnoEnforce!(int,
"/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/include/d2/std/stdio.d",
2877uL).errnoEnforce(int, lazy immutable(char)[])[@safe int
std.exception.errnoEnforce!(int,
"/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/include/d2/std/stdio.d",
2877uL).errnoEnforce(int, lazy immutable(char)[])]+0x5b): undefined
reference to `@trusted std.exception.ErrnoException
std.exception.ErrnoException.__ctor(immutable(char)[],
immutable(char)[], ulong)'
hello.d:(.text.@safe int std.exception.errnoEnforce!(int,
"/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/include/d2/std/stdio.d",
2877uL).errnoEnforce(int, lazy immutable(char)[])[@safe int
std.exception.errnoEnforce!(int,
"/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/include/d2/std/stdio.d",
2877uL).errnoEnforce(int, lazy immutable(char)[])]+0x63): undefined
reference to `_d_throwdwarf'
hello.o: In function `@safe void
std.stdio.File.LockingTextWriter.put!(immutable(char)).put(immutable(char))':

Unfortunately, I don't have any clue what might be going on...

On Saturday, 5 May 2018 at 00:07:01 UTC, Johannes Loher wrote:
> Am 04.05.2018 um 22:27 schrieb Thomas Mader:
>> [...]
> Here is a demangled version of what you posted:

Here comes the entire demangled output of the Hello World build.
Maybe it has something to do with ModuleInfo?
I also need to skip through changes which might have introduced this problem.

hello.o: In function `@safe void std.stdio.writeln!(immutable(char)[]).writeln(immutable(char)[])':
hello.d:(.text.@safe void std.stdio.writeln!(immutable(char)[]).writeln(immutable(char)[])[@safe void std.stdio.writeln!(immutable(char)[]).writeln(immutable(char)[])]+0x46): undefined reference to `@safe std.stdio.File.LockingTextWriter std.stdio.File.lockingTextWriter()'
hello.d:(.text.@safe void std.stdio.writeln!(immutable(char)[]).writeln(immutable(char)[])[@safe void std.stdio.writeln!(immutable(char)[]).writeln(immutable(char)[])]+0x57): undefined reference to `@safe void std.stdio.File.__dtor()'
hello.d:(.text.@safe void std.stdio.writeln!(immutable(char)[]).writeln(immutable(char)[])[@safe void std.stdio.writeln!(immutable(char)[]).writeln(immutable(char)[])]+0xa4): undefined reference to `@trusted void std.stdio.File.LockingTextWriter.__aggrDtor()'
hello.o:(.data.DW.ref.__dmd_personality_v0+0x0): undefined reference to `__dmd_personality_v0'
hello.o: In function `@safe int std.exception.errnoEnforce!(int, "/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/include/d2/std/stdio.d", 2877uL).errnoEnforce(int, lazy immutable(char)[])':
hello.d:(.text.@safe int std.exception.errnoEnforce!(int, "/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/include/d2/std/stdio.d", 2877uL).errnoEnforce(int, lazy immutable(char)[])[@safe int std.exception.errnoEnforce!(int, "/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/include/d2/std/stdio.d", 2877uL).errnoEnforce(int, lazy immutable(char)[])]+0x20): undefined reference to `std.exception.ErrnoException.__Class'
hello.d:(.text.@safe int std.exception.errnoEnforce!(int, "/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/include/d2/std/stdio.d", 2877uL).errnoEnforce(int, lazy immutable(char)[])[@safe int std.exception.errnoEnforce!(int, "/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/include/d2/std/stdio.d", 2877uL).errnoEnforce(int, lazy immutable(char)[])]+0x5b): undefined reference to `@trusted std.exception.ErrnoException std.exception.ErrnoException.__ctor(immutable(char)[], immutable(char)[], ulong)'
hello.d:(.text.@safe int std.exception.errnoEnforce!(int, "/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/include/d2/std/stdio.d", 2877uL).errnoEnforce(int, lazy immutable(char)[])[@safe int std.exception.errnoEnforce!(int, "/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/include/d2/std/stdio.d", 2877uL).errnoEnforce(int, lazy immutable(char)[])]+0x63): undefined reference to `_d_throwdwarf'
hello.o: In function `@safe void std.stdio.File.LockingTextWriter.put!(immutable(char)).put(immutable(char))':
hello.d:(.text.@safe void std.stdio.File.LockingTextWriter.put!(immutable(char)).put(immutable(char))[@safe void std.stdio.File.LockingTextWriter.put!(immutable(char)).put(immutable(char))]+0x1b): undefined reference to `@property @trusted core.stdc.stdio._IO_FILE* std.stdio.File.LockingTextWriter.handle_()'
hello.d:(.text.@safe void std.stdio.File.LockingTextWriter.put!(immutable(char)).put(immutable(char))[@safe void std.stdio.File.LockingTextWriter.put!(immutable(char)).put(immutable(char))]+0x37): undefined reference to `@property @trusted core.stdc.stdio._IO_FILE* std.stdio.File.LockingTextWriter.handle_()'
hello.o: In function `@safe void std.stdio.File.LockingTextWriter.put!(char).put(char)':
hello.d:(.text.@safe void std.stdio.File.LockingTextWriter.put!(char).put(char)[@safe void std.stdio.File.LockingTextWriter.put!(char).put(char)]+0x1b): undefined reference to `@property @trusted core.stdc.stdio._IO_FILE* std.stdio.File.LockingTextWriter.handle_()'
hello.d:(.text.@safe void std.stdio.File.LockingTextWriter.put!(char).put(char)[@safe void std.stdio.File.LockingTextWriter.put!(char).put(char)]+0x37): undefined reference to `@property @trusted core.stdc.stdio._IO_FILE* std.stdio.File.LockingTextWriter.handle_()'
hello.o: In function `main':
hello.d:(.text.main[main]+0xc): undefined reference to `_d_run_main'
/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/lib/libphobos2.a(lifetime_68e_482.o):(.data+0x0): undefined reference to `rt.lifetime.__ModuleInfo'
/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/lib/libphobos2.a(lifetime_68e_482.o): In function `_d_newclass':
(.text._d_newclass[_d_newclass]+0x35): undefined reference to `pure nothrow @nogc core.exception.OutOfMemoryError core.exception.staticError!(core.exception.OutOfMemoryError).staticError()'
(.text._d_newclass[_d_newclass]+0x3d): undefined reference to `_d_throwdwarf'
/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/lib/libphobos2.a(sections_elf_shared_729_640.o): In function `_d_dso_registry':
(.text._d_dso_registry[_d_dso_registry]+0xd1): undefined reference to `nothrow @nogc bool rt.sections_elf_shared.findDSOInfoForAddr(const(void*), core.sys.linux.link.dl_phdr_info*)'
(.text._d_dso_registry[_d_dso_registry]+0x404): undefined reference to `void rt.minfo.ModuleGroup.sortCtors(immutable(char)[])'
(.text._d_dso_registry[_d_dso_registry]+0x40c): undefined reference to `void rt.minfo.ModuleGroup.runCtors()'
(.text._d_dso_registry[_d_dso_registry]+0x414): undefined reference to `void rt.minfo.ModuleGroup.runTlsCtors()'
(.text._d_dso_registry[_d_dso_registry]+0x43b): undefined reference to `void rt.minfo.ModuleGroup.runTlsDtors()'
(.text._d_dso_registry[_d_dso_registry]+0x443): undefined reference to `void rt.minfo.ModuleGroup.runDtors()'
(.text._d_dso_registry[_d_dso_registry]+0x590): undefined reference to `pure nothrow @nogc core.exception.OutOfMemoryError core.exception.staticError!(core.exception.OutOfMemoryError, bool).staticError(bool)'
(.text._d_dso_registry[_d_dso_registry]+0x598): undefined reference to `_d_throwdwarf'
/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/lib/libphobos2.a(sections_elf_shared_731_4eb.o): In function `nothrow @nogc void rt.sections_elf_shared.scanSegments(ref const(core.sys.linux.link.dl_phdr_info), rt.sections_elf_shared.DSO*)':
(.text.nothrow @nogc void rt.sections_elf_shared.scanSegments(ref const(core.sys.linux.link.dl_phdr_info), rt.sections_elf_shared.DSO*)[nothrow @nogc void rt.sections_elf_shared.scanSegments(ref const(core.sys.linux.link.dl_phdr_info), rt.sections_elf_shared.DSO*)]+0x1a8): undefined reference to `pure nothrow @nogc core.exception.OutOfMemoryError core.exception.staticError!(core.exception.OutOfMemoryError, bool).staticError(bool)'
(.text.nothrow @nogc void rt.sections_elf_shared.scanSegments(ref const(core.sys.linux.link.dl_phdr_info), rt.sections_elf_shared.DSO*)[nothrow @nogc void rt.sections_elf_shared.scanSegments(ref const(core.sys.linux.link.dl_phdr_info), rt.sections_elf_shared.DSO*)]+0x1b0): undefined reference to `_d_throwdwarf'
/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/lib/libphobos2.a(common_7ee_35a.o): In function `nothrow @nogc void* rt.util.container.common.xrealloc(void*, ulong)':
(.text.nothrow @nogc void* rt.util.container.common.xrealloc(void*, ulong)[nothrow @nogc void* rt.util.container.common.xrealloc(void*, ulong)]+0x51): undefined reference to `pure nothrow @nogc core.exception.OutOfMemoryError core.exception.staticError!(core.exception.OutOfMemoryError, bool).staticError(bool)'
(.text.nothrow @nogc void* rt.util.container.common.xrealloc(void*, ulong)[nothrow @nogc void* rt.util.container.common.xrealloc(void*, ulong)]+0x59): undefined reference to `_d_throwdwarf'
/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/lib/libphobos2.a(stdio_19cc_58e.o): In function `@property @trusted std.stdio.File std.stdio.trustedStdout()':
(.text.@property @trusted std.stdio.File std.stdio.trustedStdout()[@property @trusted std.stdio.File std.stdio.trustedStdout()]+0x23): undefined reference to `nothrow @safe void std.stdio.File.__postblit()'
/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/lib/libphobos2.a(config_61a_69a.o): In function `nothrow @nogc immutable(char)[] rt.config.rt_cmdlineOption(immutable(char)[], scope immutable(char)[] delegate(immutable(char)[]) nothrow @nogc)':
(.text.nothrow @nogc immutable(char)[] rt.config.rt_cmdlineOption(immutable(char)[], scope immutable(char)[] delegate(immutable(char)[]) nothrow @nogc)[nothrow @nogc immutable(char)[] rt.config.rt_cmdlineOption(immutable(char)[], scope immutable(char)[] delegate(immutable(char)[]) nothrow @nogc)]+0x9b): undefined reference to `pure nothrow @nogc @safe bool object.__equals!(immutable(char), immutable(char)).__equals(immutable(char)[], immutable(char)[])'
(.text.nothrow @nogc immutable(char)[] rt.config.rt_cmdlineOption(immutable(char)[], scope immutable(char)[] delegate(immutable(char)[]) nothrow @nogc)[nothrow @nogc immutable(char)[] rt.config.rt_cmdlineOption(immutable(char)[], scope immutable(char)[] delegate(immutable(char)[]) nothrow @nogc)]+0xc3): undefined reference to `pure nothrow @nogc @safe bool object.__equals!(immutable(char), immutable(char)).__equals(immutable(char)[], immutable(char)[])'
/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/lib/libphobos2.a(config_61c_56c.o): In function `nothrow @nogc immutable(char)[] rt.config.rt_linkOption(immutable(char)[], scope immutable(char)[] delegate(immutable(char)[]) nothrow @nogc)':
(.text.nothrow @nogc immutable(char)[] rt.config.rt_linkOption(immutable(char)[], scope immutable(char)[] delegate(immutable(char)[]) nothrow @nogc)[nothrow @nogc immutable(char)[] rt.config.rt_linkOption(immutable(char)[], scope immutable(char)[] delegate(immutable(char)[]) nothrow @nogc)]+0x80): undefined reference to `pure nothrow @nogc @safe bool object.__equals!(immutable(char), immutable(char)).__equals(immutable(char)[], immutable(char)[])'
/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/lib/libphobos2.a(proxy.o):(.data+0x0): undefined reference to `gc.impl.proto.gc.ProtoGC.__vtbl'
/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/lib/libphobos2.a(proxy.o):(.data+0x10): undefined reference to `gc.impl.proto.gc.ProtoGC.__Class'
/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/lib/libphobos2.a(gc.o):(.data.rel.ro+0x18): undefined reference to `core.thread.__ModuleInfo'
/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/lib/libphobos2.a(gc.o):(.data.rel.ro+0x20): undefined reference to `core.time.__ModuleInfo'
/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/lib/libphobos2.a(gc.o):(.data.rel.ro+0x40): undefined reference to `gc.impl.conservative.gc.ConservativeGC.__Class'
/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/lib/libphobos2.a(bitop.o):(.data.rel.ro+0x10): undefined reference to `core.cpuid.__ModuleInfo'
/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/lib/libphobos2.a(bitop.o):(.data.rel.ro+0x18): undefined reference to `core.cpuid.__ModuleInfo'
/nix/store/x9wfppgz07zgks9yfn7c96965wmrl0xd-dmdBuild-2.079.1/lib/libphobos2.a(spinlock.o):(.data.rel.ro+0x10): undefined reference to `core.thread.__ModuleInfo'
collect2: error: ld returned 1 exit status
Error: linker exited with status 1

On Saturday, 5 May 2018 at 11:22:06 UTC, Thomas Mader wrote:
> I also need to skip through changes which might have introduced this problem.

Has anyone tried to compile with glibc 2.27?
They switched to 2.27 on Master branch and I suspect that the error has to do with that.

On Tuesday, 8 May 2018 at 14:45:53 UTC, Thomas Mader wrote:
> On Saturday, 5 May 2018 at 11:22:06 UTC, Thomas Mader wrote:
>> I also need to skip through changes which might have introduced this problem.
>
> Has anyone tried to compile with glibc 2.27?
> They switched to 2.27 on Master branch and I suspect that the error has to do with that.

Yep, using 2.27-3 on ArchLinux here and everything builds fine.

- Maybe somewhere there's still an old cache?
- Maybe dmd, druntime or phobos aren't checked out at the same version?

On Friday, 4 May 2018 at 20:27:33 UTC, Thomas Mader wrote:
> The dmd package on NixOS doesn't work anymore in their master branch.

Since dmd still works correctly on the stable branch I tried to examine the differences of libphobos2.a.
I switched back to version 2.079.0 on master to have the same version as on stable.

First I diffed the outputs of 'ar -t libphobos2.a' but there weren't any differences.

But executing 'nm libphobos2.a' results in many errors like:

nm: /home/thomad/devel/nixpkgs/result/lib/libphobos2.a(object_1_257.o): no group info for section .text._D6object6Object5opCmpMFCQqZi
nm: /home/thomad/devel/nixpkgs/result/lib/libphobos2.a(object_1_257.o): no group info for section .text._D6object6Object5opCmpMFCQqZi
nm: object_1_257.o: Bad value
nm: /home/thomad/devel/nixpkgs/result/lib/libphobos2.a(object_5_391.o): no group info for section .text._D6object9Interface9__xtoHashFNbNeKxSQBjQBfZm
nm: /home/thomad/devel/nixpkgs/result/lib/libphobos2.a(object_5_391.o): no group info for section .text._D6object9Interface9__xtoHashFNbNeKxSQBjQBfZm
nm: object_5_391.o: Bad value

nm on the static lib of the stable branch has just one error:

nm: threadasm.o: no symbols

Looking into the output of both nm calls shows that a lot of sections are missing in the static phobos lib on the master branch.
The first being object_1_257.o.

Now I wonder how something like that is possible.

On Wednesday, 9 May 2018 at 19:58:48 UTC, Thomas Mader wrote:
> Now I wonder how something like that is possible.

My suspicion about the switch to glibc 2.27 being the problem was wrong.
I did a very timeconsuming bisection and found the problem commit to be the one which bumped binutils to 2.30.

On Friday, 11 May 2018 at 04:27:20 UTC, Thomas Mader wrote:
> My suspicion about the switch to glibc 2.27 being the problem was wrong.
> I did a very timeconsuming bisection and found the problem commit to be the one which bumped binutils to 2.30.

Can somebody help me to answer the question from https://sourceware.org/bugzilla/show_bug.cgi?id=23199#c4 please.
The object is created by the dmd backend but where in the code is binutils used?

On Friday, 18 May 2018 at 10:28:37 UTC, Thomas Mader wrote:
> On Friday, 11 May 2018 at 04:27:20 UTC, Thomas Mader wrote:
>> My suspicion about the switch to glibc 2.27 being the problem was wrong.
>> I did a very timeconsuming bisection and found the problem commit to be the one which bumped binutils to 2.30.
>
> Can somebody help me to answer the question from https://sourceware.org/bugzilla/show_bug.cgi?id=23199#c4 please.
> The object is created by the dmd backend but where in the code is binutils used?

I'm not sure I understand.  Does binutils need to be used to generated an object file?  My understanding is the DMD creates the object file without the help of binutils.  The only time binutils is really called is when it calls `gcc` to do  the link at https://github.com/dlang/dmd/blob/b61d1c8989bed54489c9c7eb5acc2e1f4312b8c6/src/dmd/link.d#L157

Mike

On Friday, 18 May 2018 at 11:28:30 UTC, Mike Franklin wrote:
> On Friday, 18 May 2018 at 10:28:37 UTC, Thomas Mader wrote:
>> On Friday, 11 May 2018 at 04:27:20 UTC, Thomas Mader wrote:
>>> My suspicion about the switch to glibc 2.27 being the problem was wrong.
>>> I did a very timeconsuming bisection and found the problem commit to be the one which bumped binutils to 2.30.
>>
>> Can somebody help me to answer the question from https://sourceware.org/bugzilla/show_bug.cgi?id=23199#c4 please.
>> The object is created by the dmd backend but where in the code is binutils used?
>
> I'm not sure I understand.  Does binutils need to be used to generated an object file?  My understanding is the DMD creates the object file without the help of binutils.

As far as I know, that's correct. GCC-based compilers emit ASM code only and leave assembling of the objects files to the 'binutils as' assembler. That's probably the reason they assumed it's a binutils bug. For DMD, binutils is not involved when creating object files. So this is likely a DMD bug.

-- Johannes