# Description: The GNU Compiler Collection version 5.5.0
# URL: https://gcc.gnu.org/gcc-5/
# Maintainer: Petar Petrov, slackalaxy at gmail dot com

name=gcc5
version=5.5.0
_islver=0.18
release=2
source=(http://gcc.gnu.org/pub/gcc/releases/gcc-${version}/gcc-${version}.tar.xz
	https://libisl.sourceforge.io/isl-${_islver}.tar.bz2
	glibc2.28-ustat.patch glibc2.30-ipc_perm.patch)

build() {
	
	# Adapted from Arch Linux:
	# https://aur.archlinux.org/packages/gcc5
	
	cd gcc-$version
	ln -s ../isl-${_islver} isl
	sed -e 's@\./fixinc\.sh@-c true@' -i 'gcc/Makefile.in'
	
	patch -Nup0 -i $SRC/glibc2.28-ustat.patch
	patch -Nup0 -i $SRC/glibc2.30-ipc_perm.patch
	
	echo "$version" > gcc/BASE-VER
	
	rm -rf gcc-build
	mkdir gcc-build
	cd gcc-build
	
	../configure --prefix=/usr \
	--build="x86_64-pc-linux-gnu" \
	--disable-libssp \
	--disable-libstdcxx-pch \
	--disable-libunwind-exceptions \
	--disable-multilib \
	--disable-werror \
	--enable-__cxa_atexit \
	--enable-checking='release' \
	--enable-clocale='gnu' \
	--with-isl \
	--enable-gnu-indirect-function \
	--enable-gnu-unique-object \
	--enable-languages='c,c++,fortran,lto' \
	--enable-libmpx \
	--enable-linker-build-id \
	--enable-lto \
	--enable-plugin \
	--enable-shared \
	--enable-threads='posix' \
	--enable-version-specific-runtime-libs \
	--infodir='/usr/share/info' \
	--libdir='/usr/lib' \
	--libexecdir='/usr/lib' \
	--mandir='/usr/share/man' \
	--program-suffix="-5" \
	--with-linker-hash-style='gnu' \
	--with-system-zlib

	sed -e 's/^STAGE1_CXXFLAGS.*$/& -std=gnu++11/' -i 'Makefile'
	
	LD_PRELOAD='/usr/lib/libstdc++.so' \
	nice make -s
	
	LD_PRELOAD='/usr/lib/libstdc++.so' \
	make -j1 DESTDIR=$PKG install

	# do not conflict with system's gcc
	rm -rf $PKG/usr/share/{info,locale,man}
	cp -a $PKG/usr/lib64 $PKG/usr/lib/gcc/x86_64-pc-linux-gnu/$version/
	cp -a $PKG/usr/lib/gcc/x86_64-pc-linux-gnu/lib64/* $PKG/usr/lib/gcc/x86_64-pc-linux-gnu/$version/lib64
	rm -rf $PKG/usr/lib64
	rm -r $PKG/usr/lib/gcc/x86_64-pc-linux-gnu/lib64
	
	# empty
	rm -rf $PKG/usr/include
	
	# duplicates
	rm -rf $PKG/usr/bin/x86_64-pc-linux-gnu-*
	
	# remove junk
	find $PKG/ -name "README" -delete
}