# --- T2-COPYRIGHT-NOTE-BEGIN ---
# T2 SDE: package/*/rustc/rustc.conf
# Copyright (C) 2018 - 2024 The T2 SDE Project
# 
# This Copyright note is generated by scripts/Create-CopyPatch,
# more information can be found in the files COPYING and README.
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2.
# --- T2-COPYRIGHT-NOTE-END ---

if [ $stagelevel -gt 1 ] && [ $prefix_auto = 1 ]; then
	prefix=opt/rust # TODO: maybe a config option
	set_confopt
fi

cargo_config() {
	mkdir -p $CARGO_HOME/

	# TODO: $SDECFG_CC?
	cat <<-EOT > $CARGO_HOME/config
[target.${arch_target}] # /-t2-/-unknown-
	#cc = "${archprefix}cc"
	#cxx = "${archprefix}c++"
	#ar = "${archprefix}ar"
	#ranlib = "${archprefix}ranlib"
	linker = "$CC"
EOT
}

rustc_prepatch() {
    # we need some hotfixes pre-patched
    patchfiles=$confdir/*.prepatch apply_patchfiles

    # add all t2 extra rustc targets
    for a in "${!rust_t2_targets[@]}"; do
	local b=${rust_t2_targets[$a]}
	local _a=${a//-/_}
	local _b=${b//-/_}

	cp compiler/rustc_target/src/spec/targets/{$_b,$_a}.rs
    done
    rust_update_arch_target compiler/rustc_target/src/spec/mod.rs \
	vendor/*/no_atomic*.rs vendor/cc*/src/lib.rs
}
hook_add prepatch 5 rustc_prepatch

rustc_preconf() {
	# -t2- default target
	local orig_target="${rust_target/-t2-/-unknown-}"

	# llvm_target and .vendor
	sed 's/-unknown-/-t2-/; s/options:.*TargetOptions *{/&\nvendor: "t2".into(),/' \
		compiler/rustc_target/src/spec/targets/${orig_target//-/_}.rs > \
		compiler/rustc_target/src/spec/targets/${rust_target//-/_}.rs

	cargo_clear_cksum vendor/*/.cargo-checksum.json
}
hook_add preconf 5 rustc_preconf

# AArch64 AMDGPU ARM BPF Hexagon Lanai Mips MSP430 NVPTX PowerPC RISCV Sparc SystemZ WebAssembly X86 XCore
# keep in sync w/ llvm!;-)
targets="WebAssembly"
case $arch in
	arm) var_insert targets ';' 'ARM' ;;
	arm64) var_insert targets ';' 'AArch64' ;;
	mips*) var_insert targets ';' 'Mips' ;;
	sparc*) var_insert targets ';' 'Sparc' ;;
	powerpc*) var_insert targets ';' 'PowerPC' ;;
	riscv*) var_insert targets ';' 'RISCV' ;;
	x86*|*) var_insert targets ';' 'X86' ;;
esac

rustc_config_toml() {
    sed "s@^\[target\..*${rust_target}.*\]@&\n\
	cc = \"${archprefix}cc\"\n\
	cxx = \"${archprefix}c++\"\n\
	ar = \"${archprefix}ar\"\n\
	ranlib = \"${archprefix}ranlib\"\n\
	linker = \"${archprefix}cc\"\n\
	llvm-config = \"$sysroot/TOOLCHAIN/cross/bin/llvm-config-x\"@;
	s,^#*\(targets =\) .*,\1 \"$targets\"," -i config.toml

    if [ $SDECFG_LIBC == "musl" ]; then
	# TODO: pkgprefix libdir musl? then
	sed "s@^\[target\..*${rust_target}.*\]@&\n\
	crt-static = false\n\
	musl-root = \"$root/usr\"@" -i config.toml
    fi
}

confopt=
cleanconfopt=0

[ $stagelevel -eq 1 ] &&
	var_append confopt " " "--prefix=$sysroot/TOOLCHAIN/$toolsdir" ||
	var_append confopt " " "--prefix=$root/$prefix --libdir=$root$libdir"

rust_host=$(rustc -vV 2>/dev/null | sed -n 's/host: \(.*\)/\1/p')
rust_version=$(rustc -vV 2>/dev/null | sed -n 's/release: \(.*\)/\1/p')

# can we use the local rustc?
[ "$rust_host" = "$rust_target" -a $stagelevel -le 1 ] && rust_version=

[ "$rust_version" != "$ver" ] &&
case "$rust_version" in
    1.7[56]*)
	: ;;
    *)
	rust_version= ;;
esac

if [ "$rust_version" ]; then
	var_append confopt " " "--enable-local-rust"
else
	echo_warning "No compatible rustc, Rust will download binaries to bootstrap"
fi

var_append confopt " " "--release-channel=stable"
var_append confopt " " "--disable-codegen-tests" # needs llvm's FileCheck
var_append confopt " " "--disable-docs"
var_append confopt " " "--enable-vendor"
var_append confopt " " "--tools=" # "cargo", "rls", "clippy", "rustfmt", "analysis", "src"

if atstage native; then
    var_append confopt " " "--llvm-config=$(which llvm-config)"
else
    var_append confopt " " "--llvm-config=$sysroot/TOOLCHAIN/cross/bin/llvm-config"
    var_append confopt ' ' "--build=${arch_build/nocross/unknown}"

    hook_add premake 5 "rustc_config_toml"

    # rustc specific pseudo toolchain
    if [ $stagelevel -eq 1 ]; then
	var_append confopt ' ' "--host=${arch_build/nocross/unknown}"
	var_append confopt ' ' "--target=${rust_target},${arch_build/-nocross-/-unknown-}" # /-t2-/-unknown-
	confopt="${confopt/--tools=/--tools=cargo}" # TODO: fix to work again?

	hook_add postmake 5 "cargo_config"
    else
	var_append confopt ' ' "--host=${arch_target}" # /-t2-/-unknown-
	var_append confopt ' ' "--target=${rust_target}" # /-t2-/-unknown-
    fi
fi

[ "$SDECFG_DEFAULT_CC" = clang -a $stagelevel -gt 1 ] &&
	var_append GCC_WRAPPER_APPEND " " "-c?:-fuse-ld=lld"

makeopt=
makeinstopt=
runcargo=0

hook_add inmake 5 "./x.py build"
hook_add postmake 5 "./x.py install"