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# Maintainer: David P. <megver83@parabola.nu>

# toolchain build order: {kernel}-api-headers->glibc->binutils->gcc->binutils->glibc

# toolchain (for cross-compiler) build order:
#  {kernel}-api-headers(host system)->glibc(host system)
# ->binutils(host system)->gcc(host system)->binutils(host system)->glibc(host system)
# ->binutils(cross)->gcc(cross)
# ->kernel-api-headers(target system)->glibc(target system)
# ->binutils(target system)->gcc(target system)->binutils(target system)
# ->glibc(target system)

# NOTE: libtool requires rebuilt with each new gcc version

#--------------------------------------------------------------------------------
#  cross-compile table
#--------------------------------------------------------------------------------

# +-------------+-------------+-----------------------------------------------------------------------------------------------------+-----------+---------+
# | -march      | CARCH       | CTARGET (_CTARGET)                                                                                  | Multilib  | QEMU    |
# +-------------+-------------+-------------+-----------+---------------------------------------------------------------------------+-----------+---------+
# | _march      | CARCH       | _arch       | <machine> | _os_target (GNU/*)                                                        | _multilib | -       |
# +-------------+-------------+-------------+-----------+---------------------------------------------------------------------------+-----------+---------+
# | x86_64      | x86_64      | x86_64      | unknown   | {linux,kfreebsd,kopenbsd,knetbsd,kdragonflybsd,kopensolaris}-gnu|elf      | yes       | bin/sys |
# | i[3-7]86    | i[3-7]86    | i[3-7]86    | pc        | gnu|{linux,kfreebsd,kopenbsd,knetbsd,kopensolaris}-gnu|elf                | no        | bin/sys |
# | armv8-a     | aarch64     | aarch64     | unknown   | {linux,kfreebsd,knetbsd}-gnu|elf                                          | no        | bin/sys |
# | armv8-a     | aarch64_be  | aarch64_be  | unknown   | {linux,kfreebsd,knetbsd}-gnu|elf                                          | no        | bin/sys |
# | armv7-a     | armv7h      | armv7l      | unknown   | {linux,kfreebsd,kopenbsd,knetbsd,kopensolaris}-gnueabihf|elf              | no        | bin/sys |
# | armv6       | armv6h      | armv6l      | unknown   | {linux,kfreebsd,kopenbsd,knetbsd,kopensolaris}-gnueabihf|elf              | no        | bin/sys |
# | armv5te     | arm         | armv5tel    | unknown   | {linux,kfreebsd,kopenbsd,knetbsd,kopensolaris}-gnueabi                    | no        | bin/sys |
# | *           | arm         | arm         | unknown   | eabi                                                                      | no        | bin/sys |
# | arm         | armeb       | armeb       | unknown   | {linux,kfreebsd,kopenbsd,knetbsd}-gnueabi|eabi                            | no        | bin     |
# | mips64el    | mips64el    | mips64el    | unknown   | {linux,kfreebsd,kopenbsd,knetbsd}-gnu|elf                                 | no        | bin/sys |
# | mips64      | mips64      | mips64      | unknown   | {linux,kfreebsd,kopenbsd,knetbsd}-gnu|elf                                 | no        | bin/sys |
# | *           | mipsel      | mipsel      | unknown   | {linux,kfreebsd,kopenbsd,knetbsd}-gnu|elf                                 | no        | bin/sys |
# | *           | mips        | mips        | unknown   | {linux,kfreebsd,kopenbsd,knetbsd}-gnu|elf                                 | no        | bin/sys |
#v| powerpc64   | powerpc64   | powerpc64   | unknown   | {linux,kfreebsd,kopenbsd,knetbsd}-gnu{,eabi}|{elf,eabi}                   | no        | bin/sys |x|eabi
#x| powerpc64le | powerpc64le | powerpc64le | unknown   | {linux,kfreebsd,kopenbsd,knetbsd}-gnu{,eabi}|{elf,eabi}                   | no        | bin     |
# | powerpc     | powerpc     | powerpc     | unknown   | {linux,kfreebsd,kopenbsd,knetbsd}-gnu{,eabi}|{elf,eabi}                   | no        | bin/sys |
# | powerpcle   | powerpcle   | powerpcle   | unknown   | {linux,kfreebsd,kopenbsd,knetbsd}-gnu{,eabi}|{elf,eabi}                   | no        | -       |
# | -           | spu         | spu         | unknown   | elf                                                                       | no        | -       |
# | -           | sh64        | sh64        | unknown   | {linux,kopenbsd,knetbsd}-gnu|elf                                          | no        | -       |
# | -           | sh64le      | sh64le      | unknown   | {linux,kopenbsd,knetbsd}-gnu|elf                                          | no        | -       |
# | -           | sh4         | sh4         | unknown   | {linux,kopenbsd,knetbsd}-gnu|elf                                          | no        | bin/sys |
# | -           | sh4le       | sh4le       | unknown   | {linux,kopenbsd,knetbsd}-gnu|elf                                          | no        | bin/sys |
# | -           | sh          | sh          | unknown   | {linux,kopenbsd,knetbsd}-gnu|elf                                          | no        | - @     |
# | -           | shle        | shle        | unknown   | {linux,kopenbsd,knetbsd}-gnu|elf                                          | no        | - @     |
# | -           | m68k        | m68k        | unknown   | gnu|{linux,knetbsd}-gnu|elf                                               | no        | bin/sys |
# | -           | avr         | avr         | unknown   | linux-gnu|elf                                                             | no        | -       |
# | -           | xtensa      | xtensa      | unknown   | linux-gnu|elf                                                             | no        | sys     |
# | -           | lm32        | lm32        | unknown   | linux-gnu|elf                                                             | no        | sys     |
# | -           | or32        | or32        | unknown   | linux-gnu|elf                                                             | no        | bin/sys |x|linux-gnu
# +-------------+-------------+-------------+-----------+---------------------------------------------------------------------------+-----------+---------+

# For "Wine, Darling and DOSBox"
# +-------------+-------------+-------------+-----------+---------------------------------------------------------------------------+-----------+---------+
# | x86_64      | x86_64      | x86_64      | unknown   | mingw64(Wine)|darwin                                                      | yes       | bin/sys |
# | i[3-7]86    | i[3-7]86    | i[3-7]86    | pc        | mingw32(Wine)|msdosdjgpp(DOSBox)|darwin                                   | no        | bin/sys |
# | armv7-a     | armv7h      | armv7l      | unknown   | mingw-arm(Wine)|darwin                                                    | no        | bin/sys |
# | powerpc     | powerpc     | powerpc     | unknown   | darwin                                                                    | no        | bin/sys |
# +-------------+-------------+-------------+-----------+---------------------------------------------------------------------------+-----------+---------+

# opt : Multilib is optional
# * : Any supported by architecture.
# - : None.
# @ : bin/sys (Only sh4 and sh4l support)
# < : experimental support. (future)

# Toolchain triplet: <_arch>-<machine>-<_os_target>
# <machine> is generally optional and uneeded
_target=x86_64-pc-linux-gnu

# This are some options for names. Change $_target_name in pkgdesc according to the target architecture
case ${_target%%-*} in
    arm*) _target_name=ARM
    ;;
    aarch64*) _target_name=ARM64
    ;;
    xtensa) _target_name=Xtensa
    ;;
    sh*) _target_name=SuperH
    ;;
    powerpc*) _target_name=PowerPC
    ;;
    riscv*) _target_name=RISC-V
    ;;
    mips*) _target_name=MIPS
    ;;
    i686) _target_name=x86
    ;;
    *) _target_name=${_target%%-*}
    ;;
esac

pkgname=$_target-newlib
pkgver=3.1.0
pkgrel=1
_upstream_ver=$pkgver
pkgdesc="A C standard library implementation intended for use on embedded systems ($_target_name target)"
arch=(any)
url='http://www.sourceware.org/newlib/'
license=(BSD)
makedepends=($_target-gcc)
options=(!emptydirs !strip)
source=(https://sourceware.org/pub/newlib/newlib-$_upstream_ver.tar.gz)
sha256sums=('fb4fa1cc21e9060719208300a61420e4089d6de6ef59cf533b57fe74801d102a')

build() {
  mkdir newlib-build

  export CFLAGS_FOR_TARGET='-g -O2 -ffunction-sections -fdata-sections'
  cd "$srcdir"/newlib-build
  ../newlib-$_upstream_ver/configure \
    --target=$_target \
    --prefix=/usr \
    --enable-newlib-io-long-long \
    --enable-newlib-io-c99-formats \
    --enable-newlib-register-fini \
    --enable-newlib-retargetable-locking \
    --disable-newlib-supplied-syscalls \
    --disable-nls
  make

}

package() {
  cd "$srcdir"/newlib-build
  make DESTDIR="$pkgdir" install -j1

  find "$pkgdir"/usr/$_target/lib \( -name "*.a" -or -name "*.o" \) -exec $_target-objcopy -R .comment -R .note -R .debug_info -R .debug_aranges -R .debug_pubnames -R .debug_pubtypes -R .debug_abbrev -R .debug_line -R .debug_str -R .debug_ranges -R .debug_loc '{}' \;

  install -d "$pkgdir"/usr/share/licenses/$pkgname/
  install -m644 -t "$pkgdir"/usr/share/licenses/$pkgname/ "$srcdir"/newlib-$_upstream_ver/COPYING*
}