add \-mplt to ALLOWED_FLAGS so that it will not be strip-flags'ed

Signed-off-by: Zhang Le <r0bertz@gentoo.org>

1 files changed, 746 insertions, 0 deletions

diff --git a/eclass/flag-o-matic.eclass b/eclass/flag-o-matic.eclass
new file mode 100644
index 0000000..c223777
--- /dev/null
+++ b/eclass/flag-o-matic.eclass
@@ -0,0 +1,746 @@
+# Copyright 1999-2009 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.139 2009/06/09 22:15:43 dirtyepic Exp $
+
+# @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.
+
+inherit eutils toolchain-funcs multilib
+
+################ DEPRECATED functions ################
+# The following are still present to avoid breaking existing
+# code more than necessary; however they are deprecated. Please
+# use gcc-specs-* from toolchain-funcs.eclass instead, if you
+# need to know which hardened techs are active in the compiler.
+# See bug #100974
+#
+# has_hardened
+# has_pie
+# has_pic
+# has_ssp_all
+# has_ssp
+
+
+# {C,CXX,F,FC}FLAGS that we allow in strip-flags
+# Note: shell globs and character lists are allowed
+setup-allowed-flags() {
+	if [[ -z ${ALLOWED_FLAGS} ]] ; then
+		export ALLOWED_FLAGS="-pipe"
+		export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
+		export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
+		export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
+		export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
+		export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
+		export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
+		export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
+	fi
+	# allow a bunch of flags that negate features / control ABI
+	ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
+		-fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
+	ALLOWED_FLAGS="${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 \
+		-msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
+		-mieee -mieee-with-inexact -mschedule \
+		-mtls-direct-seg-refs -mno-tls-direct-seg-refs \
+		-mflat -mno-flat -mno-faster-structs -mfaster-structs \
+		-m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
+		-mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
+		-msecure-plt -mplt -m*-toc -D* -U*"
+
+	# {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
+	# NOTE:  currently -Os have issues with gcc3 and K6* arch's
+	export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
+	return 0
+}
+
+# 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
+				is-flagq -nopie || append-flags -nopie;;
+			-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 VAL
+	declare -a new
+
+	VAR=$1
+	shift
+	eval VAL=\${${VAR}}
+	for f in ${VAL}; do
+		for x in "$@"; do
+			# Note this should work with globs like -O*
+			[[ ${f} == ${x} ]] && continue 2
+		done
+		eval new\[\${\#new\[@]}]=\${f}
+	done
+	eval export ${VAR}=\${new\[*]}
+}
+
+# @FUNCTION: filter-flags
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS.  Accepts shell globs.
+filter-flags() {
+	_filter-hardened "$@"
+	_filter-var CFLAGS "$@"
+	_filter-var CPPFLAGS "$@"
+	_filter-var CXXFLAGS "$@"
+	_filter-var FFLAGS "$@"
+	_filter-var FCFLAGS "$@"
+	return 0
+}
+
+# @FUNCTION: filter-lfs-flags
+# @DESCRIPTION:
+# Remove flags that enable Large File Support.
+filter-lfs-flags() {
+	[[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
+	filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
+}
+
+# @FUNCTION: append-cppflags
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Add extra <flags> to the current CPPFLAGS.
+append-cppflags() {
+	[[ -z $* ]] && return 0
+	export CPPFLAGS="${CPPFLAGS} $*"
+	return 0
+}
+
+# @FUNCTION: append-cflags
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Add extra <flags> to the current CFLAGS.
+append-cflags() {
+	[[ -z $* ]] && return 0
+	export CFLAGS="${CFLAGS} $*"
+	return 0
+}
+
+# @FUNCTION: append-cxxflags
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Add extra <flags> to the current CXXFLAGS.
+append-cxxflags() {
+	[[ -z $* ]] && return 0
+	export CXXFLAGS="${CXXFLAGS} $*"
+	return 0
+}
+
+# @FUNCTION: append-fflags
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Add extra <flags> to the current {F,FC}FLAGS.
+append-fflags() {
+	[[ -z $* ]] && return 0
+	export FFLAGS="${FFLAGS} $*"
+	export FCFLAGS="${FCFLAGS} $*"
+	return 0
+}
+
+# @FUNCTION: append-lfs-flags
+# @DESCRIPTION:
+# Add flags that enable Large File Support.
+append-lfs-flags() {
+	[[ -n $@ ]] && die "append-lfs-flags takes no arguments"
+	append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
+}
+
+# @FUNCTION: append-flags
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
+append-flags() {
+	[[ -z $* ]] && return 0
+	append-cflags "$@"
+	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 ]] \
+		&& echo && eerror "Usage: replace-flags <old flag> <new flag>" \
+		&& die "replace-flags takes 2 arguments, not $#"
+
+	local f fset
+	declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
+
+	for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; 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.
+		for f in ${!fset}; do
+			# Note this should work with globs like -O*
+			[[ ${f} == ${1} ]] && f=${2}
+			eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
+		done
+		eval export ${fset}=\${new_${fset}\[*]}
+	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
+	for x in ${!1} ; 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>"
+	_is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
+}
+
+# @FUNCTION: is-flag
+# @USAGE: <flag>
+# @DESCRIPTION:
+# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS.  Accepts shell globs.
+is-flag() {
+	is-flagq "$@" && 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)
+	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 C[XX]FLAGS of everything except known good/safe flags.
+strip-flags() {
+	local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
+
+	setup-allowed-flags
+
+	local NEW_CFLAGS=""
+	local NEW_CXXFLAGS=""
+	local NEW_FFLAGS=""
+	local NEW_FCFLAGS=""
+
+	# Allow unstable C[XX]FLAGS if we are using unstable profile ...
+	if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
+		ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
+	fi
+
+	set -f	# disable pathname expansion
+
+	for x in ${CFLAGS}; do
+		for y in ${ALLOWED_FLAGS}; do
+			flag=${x%%=*}
+			if [ "${flag%%${y}}" = "" ] ; then
+				NEW_CFLAGS="${NEW_CFLAGS} ${x}"
+				break
+			fi
+		done
+	done
+
+	for x in ${CXXFLAGS}; do
+		for y in ${ALLOWED_FLAGS}; do
+			flag=${x%%=*}
+			if [ "${flag%%${y}}" = "" ] ; then
+				NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
+				break
+			fi
+		done
+	done
+
+	for x in ${FFLAGS}; do
+		for y in ${ALLOWED_FLAGS}; do
+			flag=${x%%=*}
+			if [ "${flag%%${y}}" = "" ] ; then
+				NEW_FFLAGS="${NEW_FFLAGS} ${x}"
+				break
+			fi
+		done
+	done
+
+	for x in ${FCFLAGS}; do
+		for y in ${ALLOWED_FLAGS}; do
+			flag=${x%%=*}
+			if [ "${flag%%${y}}" = "" ] ; then
+				NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
+				break
+			fi
+		done
+	done
+
+	# In case we filtered out all optimization flags fallback to -O2
+	if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
+		NEW_CFLAGS="${NEW_CFLAGS} -O2"
+	fi
+	if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
+		NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
+	fi
+	if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
+		NEW_FFLAGS="${NEW_FFLAGS} -O2"
+	fi
+	if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
+		NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
+	fi
+
+	set +f	# re-enable pathname expansion
+
+	export CFLAGS="${NEW_CFLAGS}"
+	export CXXFLAGS="${NEW_CXXFLAGS}"
+	export FFLAGS="${NEW_FFLAGS}"
+	export FCFLAGS="${NEW_FCFLAGS}"
+	return 0
+}
+
+test-flag-PROG() {
+	local comp=$1
+	local flags="$2"
+
+	[[ -z ${comp} || -z ${flags} ]] && \
+		return 1
+
+	local PROG=$(tc-get${comp})
+	${PROG} ${flags} -S -o /dev/null -xc /dev/null \
+		> /dev/null 2>&1
+}
+
+# @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" "$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" "$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" "$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" "$1"; }
+
+test-flags-PROG() {
+	local comp=$1
+	local flags
+	local x
+
+	shift
+
+	[[ -z ${comp} ]] && return 1
+
+	x=""
+	for x in "$@" ; do
+		test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
+	done
+
+	echo "${flags}"
+
+	# Just bail if we dont have any flags
+	[[ -n ${flags} ]]
+}
+
+# @FUNCTION: test-flags-CC
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
+test-flags-CC() { test-flags-PROG "CC" "$@"; }
+
+# @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_flag
+# @DESCRIPTION:
+# DEPRICIATED, use test-flags()
+test_flag() {
+	ewarn "test_flag: deprecated, please use test-flags()!" >&2
+
+	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})
+}
+
+# @FUNCTION: get-flag
+# @USAGE: <flag>
+# @DESCRIPTION:
+# Find and echo the value for a particular flag.  Accepts shell globs.
+get-flag() {
+	local f 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 f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
+		if [ "${f/${findflag}}" != "${f}" ] ; then
+			printf "%s\n" "${f/-${findflag}=}"
+			return 0
+		fi
+	done
+	return 1
+}
+
+# @FUNCTION: has_hardened
+# @DESCRIPTION:
+# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
+has_hardened() {
+	ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
+
+	test_version_info Hardened && return 0
+	# The specs file wont exist unless gcc has GCC_SPECS support
+	[[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
+}
+
+# @FUNCTION: has_pic
+# @DESCRIPTION:
+# DEPRECATED - use gcc-specs-pie from toolchain-funcs
+# indicate whether PIC is set
+has_pic() {
+	ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
+
+	[[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
+	   ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
+	gcc-specs-pie
+}
+
+# @FUNCTION: has_pie
+# @DESCRIPTION:
+# DEPRECATED - use gcc-specs-pie from toolchain-funcs
+# indicate whether PIE is set
+has_pie() {
+	ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
+
+	[[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
+	   ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
+	gcc-specs-pie
+}
+
+# @FUNCTION: has_ssp_all
+# @DESCRIPTION:
+# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
+# indicate whether code for SSP is being generated for all functions
+has_ssp_all() {
+	ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
+
+	# note; this matches only -fstack-protector-all
+	[[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
+	   -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
+	gcc-specs-ssp-to-all
+}
+
+# @FUNCTION: has_ssp
+# @DESCRIPTION:
+# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
+# indicate whether code for SSP is being generated
+has_ssp() {
+	ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
+
+	# note; this matches both -fstack-protector and -fstack-protector-all
+	[[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
+	   -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
+	gcc-specs-ssp
+}
+
+# @FUNCTION: has_m64
+# @DESCRIPTION:
+# This doesn't test if the flag is accepted, it tests if the flag actually
+# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
+# return code is 0, else the return code is 1.
+has_m64() {
+	# this doesnt test if the flag is accepted, it tests if the flag
+	# actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
+	# please dont replace this function with test_flag in some future
+	# clean-up!
+
+	local temp="$(emktemp)"
+	echo "int main() { return(0); }" > "${temp}".c
+	MY_CC=$(tc-getCC)
+	${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
+	local ret=$?
+	rm -f "${temp}".c
+	[[ ${ret} != 1 ]] && return 0
+	return 1
+}
+
+# @FUNCTION: has_m32
+# @DESCRIPTION:
+# This doesn't test if the flag is accepted, it tests if the flag actually
+# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
+# code is 0, else return code is 1.
+has_m32() {
+	# this doesnt test if the flag is accepted, it tests if the flag
+	# actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
+	# please dont replace this function with test_flag in some future
+	# clean-up!
+
+	[ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
+
+	local temp=$(emktemp)
+	echo "int main() { return(0); }" > "${temp}".c
+	MY_CC=$(tc-getCC)
+	${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
+	local ret=$?
+	rm -f "${temp}".c
+	[[ ${ret} != 1 ]] && return 0
+	return 1
+}
+
+# @FUNCTION: replace-sparc64-flags
+# @DESCRIPTION:
+# Sets mcpu to v8 and uses the original value as mtune if none specified.
+replace-sparc64-flags() {
+	local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
+
+	if [ "${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-ldflags
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Add extra <flags> to the current LDFLAGS.
+append-ldflags() {
+	[[ -z $* ]] && return 0
+	local flag
+	for flag in "$@"; do
+		[[ ${flag} == -l* ]] && \
+			ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
+	done
+
+	export LDFLAGS="${LDFLAGS} $*"
+	return 0
+}
+
+# @FUNCTION: filter-ldflags
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Remove particular <flags> from LDFLAGS.  Accepts shell globs.
+filter-ldflags() {
+	_filter-var LDFLAGS "$@"
+	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,'.
+raw-ldflags() {
+	local x input="$@"
+	[[ -z ${input} ]] && input=${LDFLAGS}
+	set --
+	for x in ${input} ; do
+		x=${x#-Wl,}
+		set -- "$@" ${x//,/ }
+	done
+	echo "$@"
+}
+
+# @FUNCTION: bindnow-flags
+# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
+# @DESCRIPTION:
+# DEPRECATED - Gets the flags needed for "NOW" binding
+bindnow-flags() {
+	ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild"
+}
+
+
+# Some tests for when we screw with things and want to make
+# sure we didn't break anything
+#TESTS() {
+#	CFLAGS="-a -b -c=1"
+#	CXXFLAGS="-x -y -z=2"
+#	LDFLAGS="-l -m -n=3"
+#
+#	die() { exit 1; }
+#	(is-flag 1 2 3) && die
+#	(is-ldflag 1 2 3) && die
+#
+#	is-flagq -l && die
+#	is-ldflagq -a && die
+#	is-flagq -a || die
+#	is-flagq -x || die
+#	is-ldflagq -n=* || die
+#	is-ldflagq -n && die
+#
+#	strip-unsupported-flags
+#	[[ ${CFLAGS} == "-c=1" ]] || die
+#	[[ ${CXXFLAGS} == "-y -z=2" ]] || die
+#
+#	echo "All tests pass"
+#}
+#TESTS