reinit the tree, so we can have metadata

1 files changed, 678 insertions, 0 deletions

diff --git a/eclass/flag-o-matic.eclass b/eclass/flag-o-matic.eclass
new file mode 100644
index 000000000000..4e3cfff5afd5
--- /dev/null
+++ b/eclass/flag-o-matic.eclass
@@ -0,0 +1,678 @@
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+# @ECLASS: flag-o-matic.eclass
+# @MAINTAINER:
+# toolchain@gentoo.org
+# @BLURB: common functions to manipulate and query toolchain flags
+# @DESCRIPTION:
+# This eclass contains a suite of functions to help developers sanely
+# and safely manage toolchain flags in their builds.
+
+if [[ -z ${_FLAG_O_MATIC_ECLASS} ]]; then
+_FLAG_O_MATIC_ECLASS=1
+
+inherit eutils toolchain-funcs multilib
+
+# Return all the flag variables that our high level funcs operate on.
+all-flag-vars() {
+	echo {C,CPP,CXX,CCAS,F,FC,LD}FLAGS
+}
+
+# {C,CPP,CXX,CCAS,F,FC,LD}FLAGS that we allow in strip-flags
+# Note: shell globs and character lists are allowed
+setup-allowed-flags() {
+	ALLOWED_FLAGS=(
+		-pipe -O '-O[12sg]' -mcpu -march -mtune
+		'-fstack-protector*' '-fsanitize*' '-fstack-check*' -fno-stack-check
+		-fbounds-check -fbounds-checking -fno-strict-overflow
+		-fno-PIE -fno-pie -nopie -no-pie -fno-unit-at-a-time
+		-g '-g[0-9]' -ggdb '-ggdb[0-9]' '-gdwarf-*' gstabs -gstabs+
+		-fno-ident -fpermissive -frecord-gcc-switches
+		'-fdiagnostics*' '-fplugin*'
+		'-W*' -w
+
+		# CPPFLAGS and LDFLAGS
+		'-[DUILR]*' '-Wl,*'
+	)
+
+	# allow a bunch of flags that negate features / control ABI
+	ALLOWED_FLAGS+=(
+		'-fno-stack-protector*' '-fabi-version=*'
+		-fno-strict-aliasing -fno-bounds-check -fno-bounds-checking -fstrict-overflow
+		-fno-omit-frame-pointer '-fno-builtin*'
+	)
+	ALLOWED_FLAGS+=(
+		-mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse
+		-mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2
+		-mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt
+		-mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt
+		-msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu
+		-mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe
+		-mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat
+		-mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi
+		-mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel
+		-mstack-bias -mno-stack-bias -msecure-plt '-m*-toc' -mfloat-abi
+		-mfix-r10000 -mno-fix-r10000 -mthumb -marm
+
+		# gcc 4.5
+		-mno-fma4 -mno-movbe -mno-xop -mno-lwp
+		# gcc 4.6
+		-mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm
+		# gcc 4.7
+		-mno-avx2 -mno-bmi2 -mno-fma -mno-lzcnt
+		# gcc 4.8
+		-mno-fxsr -mno-hle -mno-rtm -mno-xsave -mno-xsaveopt
+		# gcc 4.9
+		-mno-avx512cd -mno-avx512er -mno-avx512f -mno-avx512pf -mno-sha
+	)
+}
+
+# inverted filters for hardened compiler.  This is trying to unpick
+# the hardened compiler defaults.
+_filter-hardened() {
+	local f
+	for f in "$@" ; do
+		case "${f}" in
+			# Ideally we should only concern ourselves with PIE flags,
+			# not -fPIC or -fpic, but too many places filter -fPIC without
+			# thinking about -fPIE.
+			-fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
+				gcc-specs-pie || continue
+				if ! is-flagq -nopie && ! is-flagq -no-pie ; then
+					# Support older Gentoo form first (-nopie) before falling
+					# back to the official gcc-6+ form (-no-pie).
+					if test-flags -nopie >/dev/null ; then
+						append-flags -nopie
+					else
+						append-flags -no-pie
+					fi
+				fi
+				;;
+			-fstack-protector)
+				gcc-specs-ssp || continue
+				is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
+			-fstack-protector-all)
+				gcc-specs-ssp-to-all || continue
+				is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
+			-fno-strict-overflow)
+				gcc-specs-nostrict || continue
+				is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
+		esac
+	done
+}
+
+# Remove occurrences of strings from variable given in $1
+# Strings removed are matched as globs, so for example
+# '-O*' would remove -O1, -O2 etc.
+_filter-var() {
+	local f x var=$1 new=()
+	shift
+
+	for f in ${!var} ; do
+		for x in "$@" ; do
+			# Note this should work with globs like -O*
+			[[ ${f} == ${x} ]] && continue 2
+		done
+		new+=( "${f}" )
+	done
+	export ${var}="${new[*]}"
+}
+
+# @FUNCTION: filter-flags
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS.  Accepts shell globs.
+filter-flags() {
+	_filter-hardened "$@"
+	local v
+	for v in $(all-flag-vars) ; do
+		_filter-var ${v} "$@"
+	done
+	return 0
+}
+
+# @FUNCTION: filter-lfs-flags
+# @DESCRIPTION:
+# Remove flags that enable Large File Support.
+filter-lfs-flags() {
+	[[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
+	# http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
+	# _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
+	# _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
+	# _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
+	filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
+}
+
+# @FUNCTION: filter-ldflags
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Remove particular <flags> from LDFLAGS.  Accepts shell globs.
+filter-ldflags() {
+	_filter-var LDFLAGS "$@"
+	return 0
+}
+
+# @FUNCTION: append-cppflags
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Add extra <flags> to the current CPPFLAGS.
+append-cppflags() {
+	[[ $# -eq 0 ]] && return 0
+	export CPPFLAGS+=" $*"
+	return 0
+}
+
+# @FUNCTION: append-cflags
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Add extra <flags> to the current CFLAGS.  If a flag might not be supported
+# with different compilers (or versions), then use test-flags-CC like so:
+# @CODE
+# append-cflags $(test-flags-CC -funky-flag)
+# @CODE
+append-cflags() {
+	[[ $# -eq 0 ]] && return 0
+	# Do not do automatic flag testing ourselves. #417047
+	export CFLAGS+=" $*"
+	return 0
+}
+
+# @FUNCTION: append-cxxflags
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Add extra <flags> to the current CXXFLAGS.  If a flag might not be supported
+# with different compilers (or versions), then use test-flags-CXX like so:
+# @CODE
+# append-cxxflags $(test-flags-CXX -funky-flag)
+# @CODE
+append-cxxflags() {
+	[[ $# -eq 0 ]] && return 0
+	# Do not do automatic flag testing ourselves. #417047
+	export CXXFLAGS+=" $*"
+	return 0
+}
+
+# @FUNCTION: append-fflags
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Add extra <flags> to the current {F,FC}FLAGS.  If a flag might not be supported
+# with different compilers (or versions), then use test-flags-F77 like so:
+# @CODE
+# append-fflags $(test-flags-F77 -funky-flag)
+# @CODE
+append-fflags() {
+	[[ $# -eq 0 ]] && return 0
+	# Do not do automatic flag testing ourselves. #417047
+	export FFLAGS+=" $*"
+	export FCFLAGS+=" $*"
+	return 0
+}
+
+# @FUNCTION: append-lfs-flags
+# @DESCRIPTION:
+# Add flags that enable Large File Support.
+append-lfs-flags() {
+	[[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
+	# see comments in filter-lfs-flags func for meaning of these
+	append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
+}
+
+# @FUNCTION: append-ldflags
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Add extra <flags> to the current LDFLAGS.
+append-ldflags() {
+	[[ $# -eq 0 ]] && return 0
+	local flag
+	for flag in "$@"; do
+		[[ ${flag} == -l* ]] && \
+			eqawarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
+	done
+
+	export LDFLAGS="${LDFLAGS} $*"
+	return 0
+}
+
+# @FUNCTION: append-flags
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
+append-flags() {
+	[[ $# -eq 0 ]] && return 0
+	case " $* " in
+	*' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
+	*' '-L*|\
+	*' '-Wl,*)  eqawarn 'please use append-ldflags for linker flags' ;;
+	esac
+	append-cflags "$@"
+	append-cxxflags "$@"
+	append-fflags "$@"
+	return 0
+}
+
+# @FUNCTION: replace-flags
+# @USAGE: <old> <new>
+# @DESCRIPTION:
+# Replace the <old> flag with <new>.  Accepts shell globs for <old>.
+replace-flags() {
+	[[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
+
+	local f var new
+	for var in $(all-flag-vars) ; do
+		# Looping over the flags instead of using a global
+		# substitution ensures that we're working with flag atoms.
+		# Otherwise globs like -O* have the potential to wipe out the
+		# list of flags.
+		new=()
+		for f in ${!var} ; do
+			# Note this should work with globs like -O*
+			[[ ${f} == ${1} ]] && f=${2}
+			new+=( "${f}" )
+		done
+		export ${var}="${new[*]}"
+	done
+
+	return 0
+}
+
+# @FUNCTION: replace-cpu-flags
+# @USAGE: <old> <new>
+# @DESCRIPTION:
+# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
+# with flags that select the <new> cpu.  Accepts shell globs for <old>.
+replace-cpu-flags() {
+	local newcpu="$#" ; newcpu="${!newcpu}"
+	while [ $# -gt 1 ] ; do
+		# quote to make sure that no globbing is done (particularly on
+		# ${oldcpu}) prior to calling replace-flags
+		replace-flags "-march=${1}" "-march=${newcpu}"
+		replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
+		replace-flags "-mtune=${1}" "-mtune=${newcpu}"
+		shift
+	done
+	return 0
+}
+
+_is_flagq() {
+	local x var="$1[*]"
+	for x in ${!var} ; do
+		[[ ${x} == $2 ]] && return 0
+	done
+	return 1
+}
+
+# @FUNCTION: is-flagq
+# @USAGE: <flag>
+# @DESCRIPTION:
+# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false.  Accepts shell globs.
+is-flagq() {
+	[[ -n $2 ]] && die "Usage: is-flag <flag>"
+
+	local var
+	for var in $(all-flag-vars) ; do
+		_is_flagq ${var} "$1" && return 0
+	done
+	return 1
+}
+
+# @FUNCTION: is-flag
+# @USAGE: <flag>
+# @DESCRIPTION:
+# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS.  Accepts shell globs.
+is-flag() {
+	is-flagq "$@" && echo true
+}
+
+# @FUNCTION: is-ldflagq
+# @USAGE: <flag>
+# @DESCRIPTION:
+# Returns shell true if <flag> is in LDFLAGS, else returns shell false.  Accepts shell globs.
+is-ldflagq() {
+	[[ -n $2 ]] && die "Usage: is-ldflag <flag>"
+	_is_flagq LDFLAGS $1
+}
+
+# @FUNCTION: is-ldflag
+# @USAGE: <flag>
+# @DESCRIPTION:
+# Echo's "true" if flag is set in LDFLAGS.  Accepts shell globs.
+is-ldflag() {
+	is-ldflagq "$@" && echo true
+}
+
+# @FUNCTION: filter-mfpmath
+# @USAGE: <math types>
+# @DESCRIPTION:
+# Remove specified math types from the fpmath flag.  For example, if the user
+# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
+# -mfpmath=386.
+filter-mfpmath() {
+	local orig_mfpmath new_math prune_math
+
+	# save the original -mfpmath flag
+	orig_mfpmath=$(get-flag -mfpmath)
+	# get the value of the current -mfpmath flag
+	new_math=$(get-flag mfpmath)
+	# convert "both" to something we can filter
+	new_math=${new_math/both/387,sse}
+	new_math=" ${new_math//[,+]/ } "
+	# figure out which math values are to be removed
+	prune_math=""
+	for prune_math in "$@" ; do
+		new_math=${new_math/ ${prune_math} / }
+	done
+	new_math=$(echo ${new_math})
+	new_math=${new_math// /,}
+
+	if [[ -z ${new_math} ]] ; then
+		# if we're removing all user specified math values are
+		# slated for removal, then we just filter the flag
+		filter-flags ${orig_mfpmath}
+	else
+		# if we only want to filter some of the user specified
+		# math values, then we replace the current flag
+		replace-flags ${orig_mfpmath} -mfpmath=${new_math}
+	fi
+	return 0
+}
+
+# @FUNCTION: strip-flags
+# @DESCRIPTION:
+# Strip *FLAGS of everything except known good/safe flags.  This runs over all
+# flags returned by all_flag_vars().
+strip-flags() {
+	local x y var
+
+	local ALLOWED_FLAGS
+	setup-allowed-flags
+
+	set -f	# disable pathname expansion
+
+	for var in $(all-flag-vars) ; do
+		local new=()
+
+		for x in ${!var} ; do
+			local flag=${x%%=*}
+			for y in "${ALLOWED_FLAGS[@]}" ; do
+				if [[ -z ${flag%%${y}} ]] ; then
+					new+=( "${x}" )
+					break
+				fi
+			done
+		done
+
+		# In case we filtered out all optimization flags fallback to -O2
+		if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
+			new+=( -O2 )
+		fi
+
+		if [[ ${!var} != "${new[*]}" ]] ; then
+			einfo "strip-flags: ${var}: changed '${!var}' to '${new[*]}'"
+		fi
+		export ${var}="${new[*]}"
+	done
+
+	set +f	# re-enable pathname expansion
+
+	return 0
+}
+
+test-flag-PROG() {
+	local comp=$1
+	local lang=$2
+	local flag=$3
+
+	[[ -z ${comp} || -z ${flag} ]] && return 1
+
+	local cmdline=(
+		$(tc-get${comp})
+		# Clang will warn about unknown gcc flags but exit 0.
+		# Need -Werror to force it to exit non-zero.
+		-Werror
+		# Use -c so we can test the assembler as well.
+		-c -o /dev/null
+	)
+	if "${cmdline[@]}" -x${lang} - </dev/null &>/dev/null ; then
+		cmdline+=( "${flag}" -x${lang} - )
+	else
+		# XXX: what's the purpose of this? does it even work with
+		# any compiler?
+		cmdline+=( "${flag}" -c -o /dev/null /dev/null )
+	fi
+
+	if ! "${cmdline[@]}" </dev/null &>/dev/null; then
+		# -Werror makes clang bail out on unused arguments as well;
+		# try to add -Qunused-arguments to work-around that
+		# other compilers don't support it but then, it's failure like
+		# any other
+		cmdline+=( -Qunused-arguments )
+		"${cmdline[@]}" </dev/null &>/dev/null
+	fi
+}
+
+# @FUNCTION: test-flag-CC
+# @USAGE: <flag>
+# @DESCRIPTION:
+# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
+test-flag-CC() { test-flag-PROG "CC" c "$1"; }
+
+# @FUNCTION: test-flag-CXX
+# @USAGE: <flag>
+# @DESCRIPTION:
+# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
+test-flag-CXX() { test-flag-PROG "CXX" c++ "$1"; }
+
+# @FUNCTION: test-flag-F77
+# @USAGE: <flag>
+# @DESCRIPTION:
+# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
+test-flag-F77() { test-flag-PROG "F77" f77 "$1"; }
+
+# @FUNCTION: test-flag-FC
+# @USAGE: <flag>
+# @DESCRIPTION:
+# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
+test-flag-FC() { test-flag-PROG "FC" f95 "$1"; }
+
+test-flags-PROG() {
+	local comp=$1
+	local flags=()
+	local x
+
+	shift
+
+	[[ -z ${comp} ]] && return 1
+
+	for x ; do
+		test-flag-${comp} "${x}" && flags+=( "${x}" )
+	done
+
+	echo "${flags[*]}"
+
+	# Just bail if we dont have any flags
+	[[ ${#flags[@]} -gt 0 ]]
+}
+
+# @FUNCTION: test-flags-CC
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
+test-flags-CC() { test-flags-PROG "CC" "$@"; }
+
+# @FUNCTION: test-flags-CXX
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
+test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
+
+# @FUNCTION: test-flags-F77
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
+test-flags-F77() { test-flags-PROG "F77" "$@"; }
+
+# @FUNCTION: test-flags-FC
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
+test-flags-FC() { test-flags-PROG "FC" "$@"; }
+
+# @FUNCTION: test-flags
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Short-hand that should hopefully work for both C and C++ compiler, but
+# its really only present due to the append-flags() abomination.
+test-flags() { test-flags-CC "$@"; }
+
+# @FUNCTION: test_version_info
+# @USAGE: <version>
+# @DESCRIPTION:
+# Returns shell true if the current C compiler version matches <version>, else returns shell false.
+# Accepts shell globs.
+test_version_info() {
+	if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
+		return 0
+	else
+		return 1
+	fi
+}
+
+# @FUNCTION: strip-unsupported-flags
+# @DESCRIPTION:
+# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
+strip-unsupported-flags() {
+	export CFLAGS=$(test-flags-CC ${CFLAGS})
+	export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
+	export FFLAGS=$(test-flags-F77 ${FFLAGS})
+	export FCFLAGS=$(test-flags-FC ${FCFLAGS})
+	# note: this does not verify the linker flags but it is enough
+	# to strip invalid C flags which are much more likely, #621274
+	export LDFLAGS=$(test-flags-CC ${LDFLAGS})
+}
+
+# @FUNCTION: get-flag
+# @USAGE: <flag>
+# @DESCRIPTION:
+# Find and echo the value for a particular flag.  Accepts shell globs.
+get-flag() {
+	local f var findflag="$1"
+
+	# this code looks a little flaky but seems to work for
+	# everything we want ...
+	# for example, if CFLAGS="-march=i686":
+	# `get-flag -march` == "-march=i686"
+	# `get-flag march` == "i686"
+	for var in $(all-flag-vars) ; do
+		for f in ${!var} ; do
+			if [ "${f/${findflag}}" != "${f}" ] ; then
+				printf "%s\n" "${f/-${findflag}=}"
+				return 0
+			fi
+		done
+	done
+	return 1
+}
+
+has_m64() {
+	die "${FUNCNAME}: don't use this anymore"
+}
+
+has_m32() {
+	die "${FUNCNAME}: don't use this anymore"
+}
+
+# @FUNCTION: replace-sparc64-flags
+# @DESCRIPTION:
+# Sets mcpu to v8 and uses the original value as mtune if none specified.
+replace-sparc64-flags() {
+	local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
+
+	if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
+		for x in ${SPARC64_CPUS}; do
+			CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
+		done
+	else
+		for x in ${SPARC64_CPUS}; do
+			CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
+		done
+	fi
+
+	if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
+		for x in ${SPARC64_CPUS}; do
+			CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
+		done
+	else
+		for x in ${SPARC64_CPUS}; do
+			CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
+		done
+	fi
+
+	export CFLAGS CXXFLAGS
+}
+
+# @FUNCTION: append-libs
+# @USAGE: <libs>
+# @DESCRIPTION:
+# Add extra <libs> to the current LIBS. All arguments should be prefixed with
+# either -l or -L.  For compatibility, if arguments are not prefixed as
+# options, they are given a -l prefix automatically.
+append-libs() {
+	[[ $# -eq 0 ]] && return 0
+	local flag
+	for flag in "$@"; do
+		if [[ -z "${flag// }" ]]; then
+			eqawarn "Appending an empty argument to LIBS is invalid! Skipping."
+			continue
+		fi
+		case $flag in
+			-[lL]*)
+				export LIBS="${LIBS} ${flag}"
+				;;
+			-*)
+				eqawarn "Appending non-library to LIBS (${flag}); Other linker flags should be passed via LDFLAGS"
+				export LIBS="${LIBS} ${flag}"
+				;;
+			*)
+				export LIBS="${LIBS} -l${flag}"
+		esac
+	done
+
+	return 0
+}
+
+# @FUNCTION: raw-ldflags
+# @USAGE: [flags]
+# @DESCRIPTION:
+# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
+# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
+# to gcc where it needs the '-Wl,'.
+#
+# If no flags are specified, then default to ${LDFLAGS}.
+raw-ldflags() {
+	local x input="$@"
+	[[ -z ${input} ]] && input=${LDFLAGS}
+	set --
+	for x in ${input} ; do
+		case ${x} in
+		-Wl,*)
+			x=${x#-Wl,}
+			set -- "$@" ${x//,/ }
+			;;
+		*)	# Assume it's a compiler driver flag, so throw it away #441808
+			;;
+		esac
+	done
+	echo "$@"
+}
+
+# @FUNCTION: no-as-needed
+# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
+no-as-needed() {
+	case $($(tc-getLD) -v 2>&1 </dev/null) in
+		*GNU*) # GNU ld
+		echo "-Wl,--no-as-needed" ;;
+	esac
+}
+
+fi