# --- T2-COPYRIGHT-BEGIN ---
# t2/package/*/glibc/glibc.conf
# Copyright (C) 2004 - 2025 The T2 SDE Project
# SPDX-License-Identifier: GPL-2.0
# --- T2-COPYRIGHT-END ---

# overwrite prefix to not point to the tools, but the real root for the headers
if atstage toolchain; then
	# hack due to sane variable not available and prefix is tools prefix
	# -ReneR
	confopt="--prefix=$sysroot/$prefix --enable-hacker-mode \
	         --with-headers=$sysroot/usr/include \$confopt"
	includedir="/../../usr/include"

	# MIPS injects -mabi - the host CC does not know about it for header gen
	var_append SYSCC_WRAPPER_REMOVE ' ' '-mabi*'
	var_append SYSCPP_WRAPPER_REMOVE ' ' '-mabi*'

	case "$arch" in
	arm64)
		var_append confopt ' ' --disable-mathvec
		;;
	loongarch*)
		var_append CPPFLAGS ' ' -D__loongarch_double_float=1
		var_append CPPFLAGS ' ' -D__loongarch_lp64=1
		export CPPFLAGS
		;;
	riscv*)
		var_append CPPFLAGS ' ' "-D__riscv_xlen=$((arch_sizeof_char_p * 8)) -D__riscv_atomic=1"
		if [ "$SDECFG_SOFTFLOAT" = 1 ]; then
			var_append CPPFLAGS ' ' -D__riscv_float_abi_soft=1
		else
			var_append CPPFLAGS ' ' "-D__riscv_flen=64 -D__riscv_float_abi_double=1"
		fi
		export CPPFLAGS
		var_append SYSGCC_WRAPPER_INSERT ' ' $CPPFLAGS
		;;
	esac
else
	var_append confopt ' ' --with-headers=$root/usr/include
fi

var_append confopt ' ' --enable-kernel=2.6.32

if [ $SDECFG_SOFTFLOAT -eq 1 ]; then
	# Disable hardware floating point and use software floating point
	var_append confopt ' ' --without-fp
else
	var_append confopt ' ' --with-fp
fi

# use at least "-O" when build without optimisation for debugging ...
var_remove GCC_WRAPPER_INSERT ' ' -O0
var_insert GCC_WRAPPER_INSERT ' ' -O
var_remove SYSGCC_WRAPPER_INSERT ' ' -O0

# can't fully strip for valgrind, needing some symbols
var_remove GCC_WRAPPER_APPEND ' ' -c?:-s
var_append GCC_WRAPPER_APPEND ' ' -fno-builtin-strlen

case "$arch" in
  arm64)
	# configure: WARNING: mathvec is enabled but assembler does not support SVE.
	# configure: error: use a compatible toolchain or configure with --disable-mathvec (this results in incomplete ABI).
	var_remove GCC_WRAPPER_REMOVE ' ' '-march*'
	# gettimeofday.c:56:29: error: 'gettimeofday' alias between functions of incompatible types ...
	var_append confopt ' ' --disable-multi-arch
	;;

  powerpc64)
	# s_modff128.c:(.text+0x0): multiple definition of `__modff128_power8' ...
	var_append confopt ' ' --disable-multi-arch
	;;
esac

# glibc does not like -ffast-math
var_remove GCC_WRAPPER_APPEND ' ' -ffast-math
var_remove GCC_WRAPPER_INSERT ' ' -ffast-math

# We must use an 'objdir' directory for building glibc
# Disable glibc internal debuging but build debuging and profile
# code so we can use this glibc to debug other programs.

var_append confopt ' ' "--with-gnu-binutils --build=${arch_build} --host=${arch_target}"

# toolchain needs some guidance when we do not yet have a compiler
if atstage toolchain; then
	# t2 only auto adds it in the cross stage
	var_append confopt ' ' --cache-file=config.cache

	hook_add preconf 3 "echo 'libc_cv_forced_unwind=yes
libc_cv_c_cleanup=yes
libc_cv_gcc_exceptions=yes
libc_cv_arm_tls=yes
libc_cv_mips_tls=yes
libc_cv_asm_cfi_directive_sections=yes
ac_cv_header_cpuid_h=yes
libc_cv_mlong_double_128=yes
libc_cv_mlong_double_128ibm=yes # ppc
libc_cv_ppc_rel16=yes
libc_cv_ppc_machine=yes
libc_cv_sparcv8=yes
libc_cv_z_relro=yes # sparc64
libc_mips_float=hard # $SDECFG_SOFTFLOAT
libc_cv_no_gnu_attr_ok=yes # powerpc64le
libc_cv_target_power8_ok=yes # powerpc64le
libc_cv_gcc_builtin_tbegin=yes # s390
' >> config.cache"
fi

if ! atstage native; then
	var_append confopt ' ' --without-gd
	[ "$SDECFG_POWERPC64_ELF_ABI" = elfv2 ] && export libc_cv_ppc64_elfv2_abi=yes
elif pkginstalled libgd; then
	var_append confopt ' ' "--with-gd=/usr --with-gd-lib=/usr/lib --with-gd-include=/usr/include"
fi

# build and install the obsolete RPC code
var_append confopt ' ' --enable-obsolete-rpc

# control whether to include profiling support
if [ $SDECFG_PKG_GLIBC_ENABLE_PROFILE = 1 ]; then
	var_append confopt ' ' --enable-profile
else
	var_append confopt ' ' --disable-profile
fi

var_remove_regex makeopt " " "prefix=.*"
var_remove_regex makeinstopt " " "prefix=.*"
var_append makeopt ' ' slibdir=/\$slibdir
var_append makeinstopt ' ' "slibdir=/\$slibdir install_root=\$root PERL=no"

glibc_prepatch() {
	for tarball in `match_source_file -p ports` \
	               `match_source_file -p linuxthread`
	do
		tar $taropt $tarball

		# rename without surrounding glibc-*-version
		tarball=${tarball##*/} tarball=${tarball#*-} tarball=${tarball%%-*}
		mv glibc-${tarball}-* ${tarball}

		# remove CVS from the newly extracted files, glibc tries to
		# automatically commit newly generated files :-!
		find $tarball -name CVS | xargs rm -rfv
	done

	mkdir -p $root$includedir/gnu/
	mkdir -p $root$libdir/pkgconfig/

	if [ $pkg == glibc ]; then
		# touch is not enough to add it, "echo -n "" >>" neither?
		addStub() { for f; do dd if=/dev/null of="$f" count=0; done }
		addStub $root$includedir/gnu/stubs.h
		if [ $slibdir != lib ]; then
			addStub $root$includedir/gnu/stubs{,-32,-64}.h
			addStub $root$includedir/gnu/stubs-o32_hard.h
			if [ "$SDECFG_MIPS64_N32" = 1 ]; then
				addStub $root$includedir/gnu/stubs-{n32,n64}_hard.h
			fi
		fi
	fi
}

glibc_postmake() {
	if atstage toolchain; then
	  cp -v ../include/features.h $root$includedir
	  mkdir -p $includedir/{bits,gnu}
	  [ -e $root$includedir/bits/stdio_lim.h ] ||
	  touch $root$includedir/bits/stdio_lim.h
	  return
	fi

	# Misc. stuff
	#
	cp ../localedata/SUPPORTED $root/usr/share/i18n/
	# at least prepare the locale dir
	mkdir -p $root$libdir/locale
	#eval $MAKE localedata/install-locales

	# NSCD Init script and config
	#
	cp $base/package/*/glibc/{nscd,nsswitch}.conf $root/etc/

	# Install ld.so.conf
	#
	if [ "$SDECFG_MULTILIB" = 1 -a $slibdir != lib ]; then
		cat > $root/etc/ld.so.conf <<-EOT
		/$slibdir
		/lib
		/usr/$slibdir
		/usr/lib
		/usr/X11/$slibdir
		/usr/X11/lib
		/opt/*/$slibdir
		/opt/*/lib
		/usr/local/$slibdir
		/usr/local/lib
EOT
	else
		cat > $root/etc/ld.so.conf <<-EOT
		/$slibdir
		/usr/$slibdir
		/usr/X11/$slibdir
		/opt/*/$slibdir
		/usr/local/$slibdir
EOT
	fi

	# Move 'ldconfig' and 'sln' binaries
	#
	if [ -f "$root/usr/sbin/ldconfig" ]; then
		mv -v $root/usr/sbin/ldconfig $root/sbin/ldconfig
	fi
	if [ -f "$root/usr/sbin/sln" ]; then
		mv -v $root/usr/sbin/sln $root/sbin/sln
	fi

	# Create /lib/ld-lsb.so.1 symlink
	#
	if [ -f $root$slibdir/ld-linux-$arch_machine.so.2 ]; then
		ln -vfs ld-linux-$arch_machine.so.2 $root$slibdir/ld-lsb.so.1
	elif [ -f $root$slibdir/ld-linux.so.2 ]; then
		ln -vfs ld-linux.so.2 $root$slibdir/ld-lsb.so.1
	fi
}

# in stage 0 we only extract the headers and all is a bit easier ...
if atstage toolchain; then
	makeopt=
	makeinstopt="-k cross-compiling=yes install-headers"
fi

[[ $libdir == *lib ]] && slibdir=lib || slibdir="${libdir##*/}"

if atstage cross; then
	# hotfix gclibc-2.24 <stdin>:1:19: fatal error: cstdlib: No such file or directory
	CXX=
fi

hook_add prepatch 3 "glibc_prepatch"
hook_add postmake 5 "glibc_postmake"