#!/bin/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=compiler-rt
PKGVERSION=8.0.0
PKGREVISION=1
PKGLICENSE="MIT CUSTOM"
PKGSUMMARY="compiler-rt runtime libraries"
PKGDOWNLOAD="http://releases.llvm.org/$PKGVERSION/$PKGNAME-$PKGVERSION.src.tar.xz"

: ${CC:=clang}
: ${CFLAGS:=-O2}
: ${CXX:=clang++}
: ${CXXFLAGS:=-O2}

build()
{
	rm -rf $PKGNAME-$PKGVERSION.src
	tar xvaf $PKGNAME-$PKGVERSION.src.tar.xz
	pushd $PKGNAME-$PKGVERSION.src

	# LLVM 9.0.0: remove this patch and the links created below.
	patch -p1 < ../D28791.diff
	mkdir build && pushd build
	cmake .. \
		-DCMAKE_BUILD_TYPE=Release \
		-DCMAKE_CXX_COMPILER="$CXX" \
		-DCMAKE_CXX_FLAGS="$CXXFLAGS" \
		-DCMAKE_C_COMPILER="$CC" \
		-DCMAKE_C_FLAGS="$CFLAGS" \
		-DCMAKE_INSTALL_PREFIX=/lib/clang/$PKGVERSION \
		-DCOMPILER_RT_BUILD_BUILTINS=On \
		-DCOMPILER_RT_BUILD_SANITIZERS=Off \
		-DCOMPILER_RT_BUILD_XRAY=Off \
		-DCOMPILER_RT_USE_BUILTINS_LIBRARY=On
	make
	make install DESTDIR=$DESTDIR
	# LLVM 9.0.0: remove the following temporary links.
	ln -sf clang_rt.crtbegin_shared-$(uname -m).o \
		$DESTDIR/lib/clang/$PKGVERSION/lib/linux/crtbeginS.o
	ln -sf clang_rt.crtend_shared-$(uname -m).o \
		$DESTDIR/lib/clang/$PKGVERSION/lib/linux/crtendS.o
	ln -sf clang_rt.crtbegin-$(uname -m).o \
		$DESTDIR/lib/clang/$PKGVERSION/lib/linux/crtbeginT.o
	ln -sf clang_rt.crtend-$(uname -m).o \
		$DESTDIR/lib/clang/$PKGVERSION/lib/linux/crtend.o
	popd

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