[COPY] --- T2-COPYRIGHT-BEGIN ---
[COPY] t2/package/*/dietlibc/dietlibc.desc
[COPY] Copyright (C) 2004 - 2025 The T2 SDE Project
[COPY] Copyright (C) 1998 - 2004 ROCK Linux Project
[COPY] SPDX-License-Identifier: GPL-2.0
[COPY] --- T2-COPYRIGHT-END ---

[I] A libc optimized for small size

[T] The diet libc is a libc that is optimized for small size. It can be
[T] used to create small statically linked binaries for Linux on alpha,
[T] arm, hppa, mips, s390, sparc, ppc and i386.

[U] https://www.fefe.de/dietlibc/

[A] Felix von Leitner <felix-dietlibc@fefe.de>
[M] Rene Rebe <rene@t2-project.org>

[C] base/library
[E] group libc
[F] CROSS DIETLIBC LIBC NO-SSP NO-PIE NO-LTO.gcc

[R] - avr32 blackfin cris m68k riscv riscv64 superh superh6
[K] + linux

[L] GPL
[S] Stable
[V] 0.34
[P] O 01---5---9 102.000

[D] 81edc871f7f3ca9da4f418500117a19fb369311992087eb378b8fe3e dietlibc-0.34.tar.xz http://www.fefe.de/dietlibc/
#[D] X dietlibc-0.29-2004-12-18.tar.xz cvs://:pserver:cvs@cvs.fefe.de:/cvs dietlibc -D 2004-12-18

dietlibc_initial_fixup() {
	sed -i /WANT_SYSENTER/d dietfeatures.h

	case "$arch_machine" in
		powerpc)	ln -vs bin-ppc bin-powerpc	;;
		powerpc64)	ln -vs bin-ppc64 bin-powerpc64	;;
	esac
	
	if atstage cross || [ "$toolsdir" == cross ]; then
		mkdir -p bin-$cpu bin-native
		ln -s bin-$cpu "bin-${CC%%-*}"
	fi
}

dietlibc_make_wrappers() {
	rm -rf $toolsbin; mkdir -p $toolsbin
	for x in gcc as ld ar ranlib nm; do # wrapper
		cat <<-EOT > $toolsbin/${arch_target}-$x
		#!/bin/sh
		exec $dietbin ${pkg_dietlibc_orig_target}-$x "\$@"
		EOT
		chmod +x $toolsbin/${arch_target}-$x
	done
}

dietlibc_install_toolscross() {
	local diet=bin-$1/diet
	cp -v $diet-i $toolsbin/diet
	[ ! -f $diet-dyn-i ] ||
		cp -v $diet-dyn-i $toolsbin/diet-dyn
}

dietlibc_build_nativewrapper() {
	local DOPTCOMMON="-Os -DVERSION=\"$ver\" $dietfeatures"
	local DOPT="$DOPTCOMMON  -DDIETHOME=\"$PWD\""
	local DOPTI="$DOPTCOMMON -DDIETHOME=\"/$prefix\" -DINSTALLVERSION"

	patch -p1 < $confdir/hostlibc.diff
	$HOSTCC $DOPT  diet.c -o bin-native/diet
	$HOSTCC $DOPT  diet.c -o bin-native/diet-dyn -D__DYN_LIB
	$HOSTCC $DOPTI diet.c -o bin-native/diet-i
	$HOSTCC $DOPTI diet.c -o bin-native/diet-dyn-i -D__DYN_LIB
	patch -Rp1 < $confdir/hostlibc.diff
}

dietlibc_final_fixup() {
	for x in ppc ppc64 parisc; do
		local trg=${x/ppc/powerpc}
		trg=${x/parisc/hppa}
		if [ -d $root$libdir-$x ]; then
			rm -f $root$libdir-$trg
			ln -sfnv lib-$x $root$libdir-$trg
		fi
	done
}

prefix=usr/dietlibc
set_confopt
bindir=/usr/bin
libdir=/$prefix/lib

if [ "$SDECFG_LIBC" = "dietlibc" ]; then
	includedir=/usr/include
fi

var_append makeopt     ' ' prefix=/$prefix
var_append makeinstopt ' ' prefix=/$prefix
var_append makeopt     ' ' LIBDIR=$libdir
var_append makeinstopt ' ' LIBDIR=$libdir
var_append makeinstopt ' ' BINDIR=$bindir
var_append makeinstopt ' ' MAN1DIR=$mandir/man1

cpu="`echo $arch | arch2uname | sed -e 's/sh.$/sh/; s/hppa/parisc/'`"
hostcpu="native" # `/bin/uname -m | uname2arch | arch2uname`"

var_append makeopt     ' ' OBJDIR=bin-$cpu
var_append makeinstopt ' ' OBJDIR=bin-$cpu
var_append makeinstopt ' ' ILIBDIR=$libdir-$cpu

[ "$SDECFG_X8664_X32" = 1 ] && cpu=x32

toolsbin=$base/build/$SDECFG_ID/TOOLCHAIN/$toolsdir/diet-bin

if [ "$SDECFG_DIETLIBC_DYN" = 1 ]; then
	case $cpu in
		arm|i386|x86_64)
			var_append makeopt ' ' dyn
			;;
	esac
fi

# dietlibc contains non Thumb aware assembly ...
var_remove GCC_WRAPPER_INSERT ' ' -mthumb

# special features
dietfeatures='-DWANT_MALLOC_ZERO'
[[ $arch != hppa* ]] && var_append dietfeatures ' ' -DWANT_DYNAMIC
[ "$SDECFG_DIETWANT_SYSENTER" = "1" ] &&
	var_append dietfeatures ' ' -DWANT_SYSENTER
var_append GCC_WRAPPER_APPEND ' ' $dietfeatures

if atstage toolchain; then
	runmake=0
	hook_add postmake 4 'mkdir -p $base/build/${SDECFG_ID}${includedir}/'
	hook_add postmake 4 'find . -name "*.orig" | xargs rm -vf'
	hook_add postmake 5 'cp -rv include/* $base/build/${SDECFG_ID}${includedir}/'
else
	var_append makeopt ' ' all
	var_append makeinstopt ' ' -j1

	hook_add postpatch 5 'dietlibc_initial_fixup'
	[ $toolsdir != cross ] ||
		hook_add premake 5 'dietlibc_make_wrappers'

	if atstage cross || [ "$toolsdir" == cross ]; then
		# first build a native diet wrapper
		hook_add premake 7 "dietlibc_build_nativewrapper"
		hook_add premake 8 "dietlibc_install_toolscross native" # $hostcpu
	fi
	hook_add postmake 9 'dietlibc_final_fixup'

	dietarch=$cpu
	[[ $archprefix == mipsel* ]] && dietarch='mipsel'

	if atstage native; then
		# dietlibc uses uname - so we always need to set MYARCH
		var_append makeopt     ' ' MYARCH=$dietarch
		var_append makeinstopt ' ' MYARCH=$dietarch
	else
		var_append makeopt     ' ' "CROSS=$archprefix CC=cc"
		var_append makeopt     ' ' MYARCH=$hostcpu
		var_append makeopt     ' ' ARCH=$dietarch
		var_append makeinstopt ' ' MYARCH=$hostcpu
		var_append makeinstopt ' ' ARCH=$dietarch
	fi
fi