# --- T2-COPYRIGHT-NOTE-BEGIN ---
# T2 SDE: package/*/llvm/llvm.conf
# Copyright (C) 2009 - 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 ---

runconf=0

cmake_mod() {
	tar $taropt `match_source_file -p cmake` -C ..
	mv -vf ../cmake-*src ../../cmake
}
hook_add preconf 5 cmake_mod

[ "$SDECFG_SPARC64_32BIT" = 1 ] &&
	var_append patchfiles " " "$confdir/*sparcv9*.diff"

create_llvm_config_x() {
	# TODO: check -lz -lnucrses deps!
	local host=x86
	[[ $arch = x86* ]] && host=NaN # TODO: != native llvm target
	cat <<-EOT > $root/TOOLCHAIN/$toolsdir/bin/llvm-config-x
#!/bin/bash
llvm-config "\$@" |
sed \
-e 's, $host[^ ]*,,g' \\
-e 's,-L$root/TOOLCHAIN/cross/lib,-L$root$libdir,g' \\
-e 's,-I$root/TOOLCHAIN/cross/include,,g' \\
-e 's,-lLLVM,-lz -lncurses &,'
EOT
	chmod +x $root/TOOLCHAIN/$toolsdir/bin/llvm-config-x
}

# TODO: Lanai MSP430 NVPTX VE DirectX

# keep in sync w/ rustc! ;-)
targets="AMDGPU;BPF;WebAssembly;host" # host for cross compilation
xtargets="SPIRV"
target="$arch_target"
case $arch in
	arc) var_insert xtargets ';' 'ARC' ;;
	arm) var_insert targets ';' 'ARM' ;;
	avr) var_insert targets ';' 'AVR' ;;
	arm64) var_insert targets ';' 'AArch64' ;;
	csky) var_insert xtargets ';' 'CSKY' ;;
	hexagon) var_insert targets ';' 'Hexagon' ;;
	loongarch*) var_insert targets ';' 'Loongarch' ;;
	#m68k*) var_insert xtargets ';' 'M68k' ;;
	mips*) var_insert targets ';' 'Mips' ;;
	powerpc*) var_insert targets ';' 'PowerPC' ;;
	riscv*) var_insert targets ';' 'RISCV' ;;
	s390*) var_insert targets ';' 'SystemZ' ;;
	sparc*) var_insert targets ';' 'Sparc' ;;
	x86*) var_insert targets ';' 'X86' ;;
	xtensa) var_insert xtargets ';' 'Xtensa' ;;
	*) var_insert targets ';' 'X86'; target=x86-t2-linux-gnu ;;
esac

# TODO: fix and maybe add a config.in option?
#var_append cmakeopt " " "-DLLVM_TARGETS_TO_BUILD='$targets'"
var_append cmakeopt " " "-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD='$xtargets'"
var_append cmakeopt " " "-DLLVM_DEFAULT_TARGET_TRIPLE=$target"

if atstage toolchain; then
	var_append cmakeopt " " "-DLLVM_HOST_TRIPLE=$arch_build"
elif atstage cross; then
	var_append cmakeopt " " "-DLLVM_TABLEGEN=$root/TOOLCHAIN/$toolsdir/bin/llvm-tblgen"
	var_append cmakeopt " " "-DLLVM_CONFIG_PATH=$root/TOOLCHAIN/$toolsdir/bin/llvm-config"
	var_append GCC_WRAPPER_FILTER '|' "sed 's,^/lib64/libcurses.so,-lcurses,'"
	var_append GCC_WRAPPER_FILTER '|' "sed 's,$root/lib64/libcurses.so,-lcurses,'"

	hook_add premake 5 "create_llvm_config_x"
fi

[ "${libdir##*/lib}" ] && var_append cmakeopt " " "-DLLVM_LIBDIR_SUFFIX=${libdir##*/lib}"
# builds libraries as static and links all of them into an unique shared one
var_append cmakeopt " " "-DLLVM_BUILD_LLVM_DYLIB=ON -DLLVM_LINK_LLVM_DYLIB=ON"
#var_append cmakeopt " " "-DBUILD_SHARED_LIBS=ON"

# Needed for Zig to build properly
var_append cmakeopt " " "-DLLVM_ENABLE_ZLIB=OFF"
var_append cmakeopt " " "-DLLVM_ENABLE_TERMINFO=OFF"
var_append cmakeopt " " "-DLLVM_ENABLE_BACKTRACES=OFF"

if pkginstalled binutils; then
    [ $stagelevel -gt 1 ] &&
	var_append cmakeopt " " "-DLLVM_BINUTILS_INCDIR=$root/usr/include"
    atstage toolchain &&
	var_append cmakeopt " " "-DLLVM_BINUTILS_INCDIR=$root/TOOLCHAIN/cross/usr/$arch_build/$arch_target/include"
fi

var_append cmakeopt " " "-DLLVM_ENABLE_RTTI=ON" # for Mesa?
var_append cmakeopt " " "-DLLVM_BUILD_TESTS=OFF -DLLVM_INCLUDE_BENCHMARKS=OFF -DLLVM_INCLUDE_TESTS=OFF"
var_append cmakeopt " " "-DLLVM_ENABLE_BINDINGS=OFF -DLLVM_INCLUDE_GO_TESTS=OFF"
var_append cmakeopt " " "-DLLVM_ENABLE_ZSTD=OFF" # TODO: .a's need -lzstd?