Question: Have you seen, been ablet to get rid of these warnings?

[Icantjuddle]

I've been trying to use your flags to be able to build LLVM statically locally (in my case to get a static build of include-what-you-use). Incidentally while building I saw the following warning:

/usr/bin/ld: /tmp/clang-tblgen.mtd4W8.ltrans10.ltrans.o: in function `llvm::sys::fs::real_path(llvm::Twine const&, llvm::SmallVectorImpl<char>&, bool) [clone .part.0]':
<artificial>:(.text._ZN4llvm3sys2fs9real_pathERKNS_5TwineERNS_15SmallVectorImplIcEEb.part.0+0x4c5): warning: Using 'getpwnam_r' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
/usr/bin/ld: <artificial>:(.text._ZN4llvm3sys2fs9real_pathERKNS_5TwineERNS_15SmallVectorImplIcEEb.part.0+0x848): warning: Using 'getpwuid_r' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
[1043/2608] Building CXX object lib/Transforms/Scalar/CMakeFiles/LLVMScalarOpts.dir/EarlyCSE.cpp.o

I'm wondering if you've seen this and if it is a concern or if perhaps I've misconfigured my code.

My configure command looks like:

cmake -S llvm -B iwyu_build -DCMAKE_BUILD_TYPE=Release -G 'Ninja' -DLLVM_ENABLE_PROJECTS=clang -DLLVM_EXTERNAL_PROJECTS=iwyu -DLLVM_EXTERNAL_IWYU_SOURCE_DIR=/<redacted>/iwyu_git/ -DPython3_EXECUTABLE="/<redacted>/bin/python" -DLLVM_TARGETS_TO_BUILD=X86 -DLLVM_BUILD_STATIC=ON -DCMAKE_CXX_FLAGS="-s -flto" -DBUILD_SHARED_LIBS=OFF

[muttleyxd]

To be honest, I haven't investigated it, I assume in this case #42 is relevant - you'd want to use a library which not a glibc.