#!/bin/busybox sh
#
# Copyright (c) 2019 David Demelier <markand@malikania.fr>
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#

PKGNAME=llvm
PKGVERSION=8.0.1
PKGREVISION=1
PKGLICENSE="MIT CUSTOM"
PKGSUMMARY="low level virtual machine compiler infrastructure"
PKGDOWNLOAD="https://github.com/llvm/llvm-project/releases/download/llvmorg-$PKGVERSION/$PKGNAME-$PKGVERSION.src.tar.xz"
PKGDEPENDS="ncurses python zlib cmake:build"
PKGOPTIONS="DOXYGEN FFI LIBCXX LIBEDIT XML LLD NCURSES SPHINX TARGETS ZLIB"

: ${CHOST:=$(uname -m)-linux-musl}
: ${CC:=clang}
: ${CFLAGS:=-O2}
: ${CXX:=clang++}
: ${CXXFLAGS:=-O2}
: ${DOXYGEN:=yes}
: ${FFI:=no}
: ${LIBCXX:=yes}
: ${LIBEDIT:=yes}
: ${XML:=yes}
: ${LLD:=yes}
: ${NCURSES:=yes}
: ${SPHINX:=no}         # TODO: set to on once sphinx is there.
: ${TARGETS:=all}
: ${ZLIB:=yes}

if [ "$DOXYGEN" = "yes" ]; then
	PKGDEPENDS="doxygen:build $PKGDEPENDS"
	with_doxygen="-DLLVM_ENABLE_DOXYGEN=On"
else
	with_doxygen="-DLLVM_ENABLE_DOXYGEN=Off"
fi

if [ "$FFI" = "yes" ]; then
	PKGDEPENDS="libffi $PKGDEPENDS"
	with_ffi="-DLLVM_ENABLE_FFI=On"
else
	with_ffi="-DLLVM_ENABLE_FFI=Off"
fi

if [ "$LIBCXX" = "yes" ]; then
	PKGDEPENDS="libc++ $PKGDEPENDS"
	with_libcxx="-DLLVM_ENABLE_LIBCXX=On"
else
	with_libcxx="-DLLVM_ENABLE_LIBCXX=Off"
fi

if [ "$LIBEDIT" = "yes" ]; then
	PKGDEPENDS="libedit $PKGDEPENDS"
	with_libedit="-DLLVM_ENABLE_LIBEDIT=On"
else
	with_libedit="-DLLVM_ENABLE_LIBEDIT=Off"
fi

if [ "$XML" = "yes" ]; then
	PKGDEPENDS="libxml2 $PKGDEPENDS"
	with_xml="-DLLVM_ENABLE_LIBXML2=On"
else
	with_xml="-DLLVM_ENABLE_LIBXML2=Off"
fi

if [ "$LLD" = "yes" ]; then
	with_lld="-DLLVM_ENABLE_LLD=On"
else
	with_lld="-DLLVM_ENABLE_LLD=Off"
fi

if [ "$NCURSES" = "yes" ]; then
	PKGDEPENDS="ncurses $PKGDEPENDS"
	with_ncurses="-DLLVM_ENABLE_TERMINFO=On"
else
	with_ncurses="-DLLVM_ENABLE_TERMINFO=Off"
fi

if [ "$SPHINX" = "yes" ]; then
	PKGDEPENDS="dev/sphinx:build $PKGDEPENDS"
	with_sphinx="-DLLVM_ENABLE_SPHINX=On"
else
	with_sphinx="-DLLVM_ENABLE_SPHINX=Off"
fi

if [ "$ZLIB" = "yes" ]; then
	PKGDEPENDS="zlib $PKGDEPENDS"
	with_zlib="-DLLVM_ENABLE_ZLIB=On"
else
	with_zlib="-DLLVM_ENABLE_ZLIB=Off"
fi

build()
{
	rm -rf $PKGNAME-$PKGVERSION.src
	tar xvf $PKGNAME-$PKGVERSION.src.tar.xz
	cd $PKGNAME-$PKGVERSION.src

	mkdir build && cd build
	cmake .. \
		-DCMAKE_BUILD_TYPE=Release \
		-DCMAKE_INSTALL_PREFIX= \
		-DCMAKE_C_COMPILER="$CC" \
		-DCMAKE_C_FLAGS="$CFLAGS" \
		-DCMAKE_CXX_COMPILER="$CXX" \
		-DCMAKE_CXX_FLAGS="$CXXFLAGS" \
		-DLLVM_ENABLE_EH=On \
		-DLLVM_ENABLE_RTTI=On \
		-DLLVM_HOST_TRIPLE=$CHOST \
		-DLLVM_TARGETS_TO_BUILD=$TARGETS \
		-DLLVM_BUILD_LLVM_DYLIB=On \
		-DLLVM_LINK_LLVM_DYLIB=On \
		$with_doxygen \
		$with_ffi \
		$with_libcxx \
		$with_libedit \
		$with_xml \
		$with_lld \
		$with_ncurses \
		$with_sphinx \
		$with_zlib
	make
	make DESTDIR=$DESTDIR install
	cd ..

	cd ..
	rm -rf $PKGNAME-$PKGVERSION.src
}
