[arch-general] RFC: Cross compilers using newlib

[Christer Solskogen]

Hi!

Instead of having a separate binutils, gcc and newlib package for every 
architecture it is possible to combine them into one. You can even build 
them all in one swoop if you want. For instance, in something like this:

_target=m68k-elf
_binutilsver=2.28
_gccver=6.3.0
_islver=0.18
_newlibver=2.5.0.20170228
pkgname=${_target}-devkit
pkgver=20170320
pkgrel=1
pkgdesc="A combined binutils/gcc/newlib kit for ${_target}"
arch=('x86_64')
options=('!strip')
depends=('gmp' 'mpfr' 'libmpc')
url="http://dummy.no"
license=('GPL' 'LGPL' 'BSD')
source=(binutils-${_binutilsver}.tar.gz gcc-${_gccver}.tar.gz 
isl-${_islver}.tar.gz newlib-${_newlibver}.tar.gz)
md5sums=('d5d270fd0b698ed59ca5ade8e1b5059c'
          '6e5ea04789678f1250c1b30c4d9ec417'
          '076c69f81067f2f5b908c099f445a338'
          '6b7b45ed2280de9196df62511094fc58')

prepare()
{
         cd ${srcdir}/gcc-${_gccver}
         ln -s ../isl-${_islver} isl

         # Do not run fixincludes
         sed -i 's@\./fixinc\.sh at -c true@' gcc/Makefile.in

         # Create a combined source tree
         for i in bfd binutils gas ld opcodes
         do
                 ln -s ${srcdir}/binutils-${_binutilsver}/$i
         done

         ln -s ${srcdir}/newlib-${_newlibver}/newlib

         mkdir ${srcdir}/build

}

build()
{
	#binutils does not compile with the CPPFLAGS in makepkg.conf
         unset CPPFLAGS

         cd ${srcdir}/build
         ${srcdir}/gcc-${_gccver}/configure --prefix=/usr 
--libexecdir=/usr/lib --target=${_target} --enable-languages=c,c++ 
--disable-libstdcxx-pch --with-newlib
         make
}

package()
{
         cd ${srcdir}/build
         make install-strip DESTDIR=${pkgdir}
         rm -rf ${pkgdir}/usr/share
         rm ${pkgdir}/usr/lib/libcc1*
}


Is this something that should be done? Or are there good reasons to keep 
them separate?

-- 
chs