Building LDC on windows, woe is me!

[claptrap]

On Monday, 21 August 2023 at 08:15:16 UTC, kinke wrote:
> On Sunday, 20 August 2023 at 00:12:06 UTC, claptrap wrote:
>> Ok got as far as generating NINJA build files, but now the 
>> build is failing...
>>
>>
>> C:\LDCDEV\build-ldc-x64>ninja
>> [1/104] Linking CXX executable bin\FileCheck.exe
>> FAILED: bin/FileCheck.exe
>>
>> error LNK2019: unresolved external symbol __std_find_trivial_8
>> error LNK2001: unresolved external symbol __std_find_trivial_1
>> error LNK2001: unresolved external symbol 
>> __std_init_once_link_alternate_names_and_abort
>>
>> and others
>>
>> Actual output is prob 1000 lines but seems to be mostly 
>> unresolved eternal symbols, in llvm.
>>
>> Any ideas?
>
> I guess you're using a prebuilt LLVM but a non-matching Visual 
> C++ version. Our prebuilt LLVM is built with VS 2022 and clang 
> 15. As stated in 
> https://wiki.dlang.org/Building_and_hacking_LDC_on_Windows_using_MSVC#Building_LLVM, you'll need to build LLVM yourself in such a case.

Thanks, I managed to get it all to work, I had to build llvm from 
scratch as you suggest.

There were a few other things tripping me up but I got there in 
the end. I just deleted everything and ran though the 
instructions more carefully. With what I learned from the first 
try it all went smoothly.

Making sure everything was "run as administrator" was probably 
the main issue. Like for some reason if I forgot to run the shell 
as administrator, CMAKE would run, but it would error out on odd 
things. Like it would detect the compilers, but not the compiler 
ABI.