# Copyright 2021-2023 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

# this is for now highly experimental -dilfridge

# use clang as the primary compiler
CC="clang"
CXX="clang++"

# libtool needs this
LD="ld.lld"

# linker flags
# We don't set LDFLAGS here for linker, rtlib, etc because clang-common enforces
# the needed bits for us and it confuses clang->gcc for stuff like Fortran,
# see bug #908798.
LDFLAGS="${LDFLAGS} -Wl,--as-needed"

# use LLVM-provided binutils
AR="llvm-ar"
AS="clang -c"
CPP="clang-cpp"
NM="llvm-nm"
STRIP="llvm-strip"
RANLIB="llvm-ranlib"
OBJCOPY="llvm-objcopy"
STRINGS="llvm-strings"
OBJDUMP="llvm-objdump"
READELF="llvm-readelf"
ADDR2LINE="llvm-addr2line"

# Rust needs this to build some crates (like uutils)
# https://github.com/rust-lang/rust/blob/master/compiler/rustc_llvm/build.rs
LLVM_USE_LIBCXX=1
# https://github.com/rust-lang/cc-rs#c-support
# https://github.com/rust-lang/cc-rs/blob/main/src/lib.rs
CXXSTDLIB="c++"

# bootstrap USE for stage1

# curl needed by cmake
BOOTSTRAP_USE="${BOOTSTRAP_USE} ssl curl_ssl_openssl"

# Clang needs this
BOOTSTRAP_USE="${BOOTSTRAP_USE} python_single_target_python3_11"

# sys-devel/llvm
BOOTSTRAP_USE="${BOOTSTRAP_USE} -binutils-plugin"

# sys-devel/clang, sys-devel/clang-runtime, sys-libs/llvm-libunwind, sys-libs/libcxx, sys-libs/libcxxabi
BOOTSTRAP_USE="${BOOTSTRAP_USE} compiler-rt clang libunwind"

# sys-devel/clang
BOOTSTRAP_USE="${BOOTSTRAP_USE} default-compiler-rt default-lld default-libcxx llvm-libunwind"

# sys-devel/clang-runtime
BOOTSTRAP_USE="${BOOTSTRAP_USE} libcxx -sanitize"

# sys-libs/libcxxabi
BOOTSTRAP_USE="${BOOTSTRAP_USE} libcxxabi"

# llvm & clang: explicitly disable all extra targets, otherwise linking stage2 fails
BOOTSTRAP_USE="${BOOTSTRAP_USE} -llvm_targets_BPF -llvm_targets_AMDGPU -llvm_targets_NVPTX -llvm_targets_BPF"