Peter Waller 6ba1b5b0b3 llvmPackages_15, llvmPackages_16: Make the pkgsLLVM.stdenv work ... What changed: * Fixed crtbeginS.o and crtendS.o missing (they may or may not be called crt{begin_end},{,_shared}. * Fixed implicit function declaration causing build errors for various builds by supplying -Wno-implicit-function-declaration. * Fixed __cxxabi_config.h missing, by adding -I${cxxabi}/include/c++/v1 in the wrapper. * Fixed libcxx failing to build due to missing libunwind symbols by including libunwind as a buildInput, and setting -DLIBCXX_ADDITIONAL_LIBRARIES=unwind for stdenv.hostPlatform.useLLVM == true. * libcxxabi wants to find libunwind at libunwind_shared.so, so symlink it there in libunwind. * llvmPackages_16.libcxxabi: Pass -nostdlib via CMAKE_*_LINKER_FLAGS Without this flag, the link of libcxxabi.so tries to pull in libgcc and friends, from the clang compiler driver. * Drop unneeded musl hack patch from libcxx. * Pass -Wno-error=implicit-function-declaration only to compiler-rt See LLVM forum discussion: https://discourse.llvm.org/t/configure-script-breakage-with-the-new-werror-implicit-function-declaration/65213 In summary, LLVM 16 made implicit function declaration an error. This happens a lot in configure scripts which can break things. * llvmPackages_16: !isDarwin: Supply -DLIBCXX_ABI_USE_LLVM_UNWINDER=On Otherwise it fails with various undefined references to _Unwind_* functions: (full list: _Unwind_DeleteException _Unwind_GetIP _Unwind_GetLanguageSpecificData _Unwind_GetRegionStart _Unwind_RaiseException _Unwind_Resume _Unwind_SetGR _Unwind_SetIP). * 16.libcxxabi: Only pass -nostdlib for useLLVM and Darwin builds What was tested: * x86_64-linux, aarch64-linux, the stdenv builds. * Additionally I was able to get nix to build, with an overlay to fix a couple of minor issues in downstream packages (overlay supplied in PR #246577. * aarch64-darwin fails spuriously in a single LLVM test strip-preserve-atime.test checking atime timestamps. * The same for pkgsLLVM with llvmPackages = llvmPackages_15. Signed-off-by: Peter Waller <p@pwaller.net>		2023-08-22 17:33:24 +01:00
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default.nix
gnu-install-dirs.patch
wasm.patch