So far I've been building LDC against upstream LLVM 9.0.0. When I build with the LDC fork of LLVM, 9.0.1 I a bunch of the following warnings when compiling the test runners for iOS:

ld: warning: pointer not aligned at address 0x10321E776 (anon + 1270 from ~/development/d/ios-druntime/ldc-build-runtime.tmp/lib/libphobos2-ldc-unittest-debug.a(uni.o))

ld: warning: pointer not aligned at address 0x1033AAFB3 (anon + 110 from lib/libdruntime-ldc-debug.a(ti_Areal.o))

I'm not sure if it's because it's LLVM 9.0.1 or if it's because the LDC fork.

-- 
/Jacob Carlborg

On Saturday, 21 March 2020 at 19:20:22 UTC, Jacob Carlborg wrote:
> I'm not sure if it's because it's LLVM 9.0.1 or if it's because the LDC fork.

There's only one LDC-specific Mach-O related change potentially related to this, https://github.com/ldc-developers/llvm-project/commit/110deda1bc1cf195983fea8c1107886057987955. [The effect of which can be tested by hacking LDC, grep for `emitMachODwarfLineAsRegularSection`.]

On 2020-03-21 20:29, kinke wrote:

> There's only one LDC-specific Mach-O related change potentially related to this, https://github.com/ldc-developers/llvm-project/commit/110deda1bc1cf195983fea8c1107886057987955. [The effect of which can be tested by hacking LDC, grep for `emitMachODwarfLineAsRegularSection`.]

Yeah, that's it. If I run with `--preserve-dwarf-line-section=false` the problem is gone. That's unfortunate :(. It seem to run properly anyway.

-- 
/Jacob Carlborg

On Sunday, 22 March 2020 at 08:01:33 UTC, Jacob Carlborg wrote:
> Yeah, that's it. If I run with `--preserve-dwarf-line-section=false` the problem is gone. That's unfortunate :(. It seem to run properly anyway.

Well, it was clear from the beginning that that's a hack, and the proper fix needs to be in druntime, not relying on extra preserved sections for backtrace lineinfos (https://issues.dlang.org/show_bug.cgi?id=20510).

On the plus side, it should only affect builds with debuginfos and can be disabled without hacking LDC (thx, I forgot about that switch).