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[COPY] t2/package/*/llvm/llvm.desc
[COPY] Copyright (C) 2008 - 2025 The T2 SDE Project
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[I] Low Level Virtual Machine

[T] Low-Level Virtual Machine (LLVM) is a compiler infrastructure designed for
[T] compile-time, link-time, run-time, and "idle-time" optimization of
[T] programs from arbitrary programming languages. It currently supports
[T] compilation of C, Objective-C, and C++ programs, using front-ends derived
[T] from GCC 4.0, GCC 4.2, and a custom new front-end, "clang". It supports
[T] x86, x86-64, ia64, PowerPC, and SPARC, with support for Alpha and ARM
[T] under development.

[U] https://llvm.org/
[U] https://clang.llvm.org/
[U] https://vmkit.llvm.org/

[A] University of Illinois/NCSA
[A] Chris Lattner <clattner@apple.com>
[M] Rene Rebe <rene@t2-project.org>

[C] base/system

# LTO works, but either becomes large, and/or does segfault
[F] CROSS OBJDIR NO-LTO.gcc LATOMIC.sparc LATOMIC.sparc64
[R] - alpha arc avr32 blackfin m68k microblaze nios2 openrisc

[L] BSD
[S] Stable
[V] 20.1.4
[P] X 01---5---9 102.500

[CV-GROUP] llvmorg
[D] e0a6028c6e8358507ac6f380f8475370c4aacdd1694e2d73820f8886 llvm-20.1.4.src.tar.xz https://github.com/llvm/llvm-project/releases/download/llvmorg-20.1.4/
[D] a9713c0e19a33e061a143e6c6a7cd5c3d5706a8796c5507caa26469f llvm-cmake-20.1.4.src.tar.xz !https://github.com/llvm/llvm-project/releases/download/llvmorg-20.1.4/cmake-20.1.4.src.tar.xz

runconf=0

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

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
}

targets="AMDGPU;BPF;WebAssembly;host" # host for cross compilation
xtargets="SPIRV"
target="$arch_target"

. $base/package/*/*/llvm-conf.in

# 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

var_append cmakeopt ' ' -DLLVM_ENABLE_ZLIB=ON
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?

# required by rustc-1.81.x to link against the "llvm::machineinstr::dump() const" function
var_append cmakeopt ' ' -DLLVM_ENABLE_DUMP=ON