[llvm] [lldb] DEBUGINFOD based DWP acquisition for LLDB (PR #70996)

[Michał Górny via llvm-commits]

mgorny wrote:

I'm sorry for not getting back to you earlier. The log relevant to building LLVM itself is this (22M uncompressed):

[sys-devel:llvm-18.0.0_pre20231206:20231206-072428.log.gz](https://github.com/llvm/llvm-project/files/13627566/sys-devel.llvm-18.0.0_pre20231206.20231206-072428.log.gz)

I think the most relevant part is:

```
-DLLVM_DISTRIBUTION_COMPONENTS="LLVM;LTO;Remarks;llvm-config;cmake-exports;llvm-headers;LLVMDemangle;LLVMSupport;LLVMTableGen;llvm_gtest;llvm_gtest_main;LLVMTestingAnnotations;LLVMTestingSupport;llvm-tblgen;FileCheck;llvm-PerfectShuffle;count;not;yaml-bench;UnicodeNameMappingGenerator;bugpoint;dsymutil;llc;lli;lli-child-target;llvm-addr2line;llvm-ar;llvm-as;llvm-bcanalyzer;llvm-bitcode-strip;llvm-c-test;llvm-cat;llvm-cfi-verify;llvm-config;llvm-cov;llvm-cvtres;llvm-cxxdump;llvm-cxxfilt;llvm-cxxmap;llvm-debuginfo-analyzer;llvm-debuginfod-find;llvm-diff;llvm-dis;llvm-dlltool;llvm-dwarfdump;llvm-dwarfutil;llvm-dwp;llvm-exegesis;llvm-extract;llvm-gsymutil;llvm-ifs;llvm-install-name-tool;llvm-jitlink;llvm-jitlink-executor;llvm-lib;llvm-libtool-darwin;llvm-link;llvm-lipo;llvm-lto;llvm-lto2;llvm-mc;llvm-mca;llvm-ml;llvm-modextract;llvm-mt;llvm-nm;llvm-objcopy;llvm-objdump;llvm-opt-report;llvm-otool;llvm-pdbutil;llvm-profdata;llvm-profgen;llvm-ranlib;llvm-rc;llvm-readelf;llvm-readobj;llvm-readtapi;llvm-reduce;llvm-remarkutil;llvm-rtdyld;llvm-sim;llvm-size;llvm-split;llvm-stress;llvm-strings;llvm-strip;llvm-symbolizer;llvm-tli-checker;llvm-undname;llvm-windres;llvm-xray;obj2yaml;opt;sancov;sanstats;split-file;verify-uselistorder;yaml2obj;opt-viewer;docs-dsymutil-man;docs-llvm-dwarfdump-man;docs-llvm-man;docs-llvm-html;LLVMgold;llvm-debuginfod"
```

We don't install `LLVMDebuginfod.a` at all right now. I suppose I could try doing that but last we tried to do something similar, all hell broke loose because of its dependency on other libraries from LLVM. It's a mess, I'm afraid.

At this point, I think the only reasonable solution here is to include `LLVMDebuginfod` in `libLLVM`.

https://github.com/llvm/llvm-project/pull/70996