gentoo-x86/eclass/flag-o-matic.eclass

# Copyright 1999-2004 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.78 2004/12/22 21:18:35 eradicator Exp $
#
# Author Bart Verwilst <verwilst@gentoo.org>

ECLASS=flag-o-matic
INHERITED="$INHERITED $ECLASS"

IUSE="debug"

# need access to emktemp()
inherit eutils toolchain-funcs

#
#### filter-flags <flags> ####
# Remove particular flags from C[XX]FLAGS
# Matches only complete flags
#
#### append-flags <flags> ####
# Add extra flags to your current C[XX]FLAGS
#
#### replace-flags <orig.flag> <new.flag> ###
# Replace a flag by another one
#
#### replace-cpu-flags <old.cpus> <new.cpu> ###
# Replace march/mcpu flags that specify <old.cpus>
# with flags that specify <new.cpu>
#
#### is-flag <flag> ####
# Returns "true" if flag is set in C[XX]FLAGS
# Matches only complete a flag
#
#### strip-flags ####
# Strip C[XX]FLAGS of everything except known
# good options.
#
#### strip-unsupported-flags ####
# Strip C[XX]FLAGS of any flags not supported by
# installed version of gcc
#
#### get-flag <flag> ####
# Find and echo the value for a particular flag
#
#### replace-sparc64-flags ####
# Sets mcpu to v8 and uses the original value
# as mtune if none specified.
#
#### filter-mfpmath <math types> ####
# Remove specified math types from the fpmath specification
# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
# will leave the user with -mfpmath=386
#
#### append-ldflags ####
# Add extra flags to your current LDFLAGS
#
#### filter-ldflags <flags> ####
# Remove particular flags from LDFLAGS
# Matches only complete flags
#
#### etexec-flags ####
# hooked function for hardened gcc that appends
# -fno-pic to {C,CXX,LD}FLAGS
# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
#
#### fstack-flags ####
# hooked function for hardened gcc that appends
# -fno-stack-protector to {C,CXX,LD}FLAGS
# when a package is filtering -fstack-protector, -fstack-protector-all
# notice: modern automatic specs files will also suppress -fstack-protector-all
# when only -fno-stack-protector is given
#

# C[XX]FLAGS that we allow in strip-flags
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="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector"
                export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
                export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
                case "${ARCH}" in
                        mips)   ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
                        amd64)  ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
                        x86)    ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
                        alpha)  ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
                        ia64)   ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
                        sparc)  ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;;
                        ppc)    ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;;
                esac
        fi
        # allow a bunch of flags that negate features / control ABI
        ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
        case "${ARCH}" in
                x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
        esac
        ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias"

        # C[XX]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 -fprefetch-loop-arrays"
        return 0
}

filter-flags() {
        local x f fset 
        declare -a new_CFLAGS new_CXXFLAGS

        for x in "$@" ; do
                case "${x}" in
                        -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
                        -fstack-protector|-fstack-protector-all) fstack-flags;;
                esac
        done

        for fset in CFLAGS CXXFLAGS; 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 ${!fset}; do
                        for x in "$@"; do
                                # Note this should work with globs like -O*
                                [[ ${f} == ${x} ]] && continue 2
                        done
                        eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
                done
                eval export ${fset}=\${new_${fset}\[*]}
        done

        return 0
}

filter-lfs-flags() {
        filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
}

append-lfs-flags() {
        append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
}

append-flags() {
        export CFLAGS="${CFLAGS} $*"
        export CXXFLAGS="${CXXFLAGS} $*"
        [ -n "`is-flag -fno-stack-protector`" -o \
                -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
        return 0
}

replace-flags() {
        local f fset 
        declare -a new_CFLAGS new_CXXFLAGS

        for fset in CFLAGS CXXFLAGS; 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
}

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-flag() {
        local x

        for x in ${CFLAGS} ${CXXFLAGS} ; do
                # Note this should work with globs like -mcpu=ultrasparc*
                if [[ ${x} == ${1} ]]; then
                        echo true
                        return 0
                fi
        done
        return 1
}

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 | tr , ' '` "
        # 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 ${new_math:1:${#new_math}-2} | tr ' ' ,`"

        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
}

strip-flags() {
        local x y flag NEW_CFLAGS NEW_CXXFLAGS

        setup-allowed-flags

        local NEW_CFLAGS=""
        local NEW_CXXFLAGS=""

        # Allow unstable C[XX]FLAGS if we are using unstable profile ...
        if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
                use debug && einfo "Enabling the use of some unstable flags"
                ALLOWED_FLAGS="${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

        # 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

        set +f  # re-enable pathname expansion

        export CFLAGS="${NEW_CFLAGS}"
        export CXXFLAGS="${NEW_CXXFLAGS}"
        return 0
}

test_flag() {
        if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
                printf "%s\n" "$*"
                return 0
        fi
        return 1
}

test_version_info() {
        if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
                return 0
        else
                return 1
        fi
}

strip-unsupported-flags() {
        local NEW_CFLAGS NEW_CXXFLAGS

        for x in ${CFLAGS} ; do
                NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
        done
        for x in ${CXXFLAGS} ; do
                NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
        done

        export CFLAGS="${NEW_CFLAGS}"
        export CXXFLAGS="${NEW_CXXFLAGS}"
}

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} ${CXXFLAGS} ; do
                if [ "${f/${findflag}}" != "${f}" ] ; then
                        printf "%s\n" "${f/-${findflag}=}"
                        return 0
                fi
        done
        return 1
}

has_hardened() {
        test_version_info Hardened && return 0
        # the specs file wont exist unless gcc has GCC_SPECS support
        [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
                return 0
        return 1
}

has_pic() {
        [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
        [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
        test_version_info pie && return 0
        return 1
}

has_pie() { 
        [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
        [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
        test_version_info pie && return 0
        return 1
}
        
has_ssp() {
        [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
        test_version_info ssp && return 0
        return 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
}

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!
        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
}

replace-sparc64-flags() {
        local SPARC64_CPUS="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
}

append-ldflags() {
        export LDFLAGS="${LDFLAGS} $*"
        return 0
}

filter-ldflags() {
        local x

        # we do this fancy spacing stuff so as to not filter
        # out part of a flag ... we want flag atoms ! :D
        LDFLAGS=" ${LDFLAGS} "
        for x in "$@" ; do
                LDFLAGS="${LDFLAGS// ${x} / }"
        done
        LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
        export LDFLAGS
        return 0
}

etexec-flags() {
        # if you're not using a hardened compiler you wont need this
        # PIC/no-pic kludge in the first place.
        has_hardened || return 0
        use amd64 && return 0
        use mips && return 0

        if has_pie || has_pic; then
                [ -z "`is-flag -fno-pic`" ] && 
                        export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
                [ -z "`is-flag -nopie`" ] && 
                        export CFLAGS="${CFLAGS} `test_flag -nopie`"
        fi
        return 0
}

fstack-flags() {
        if has_ssp; then
                [ -z "`is-flag -fno-stack-protector`" ] && 
                        export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
        fi
        return 0
}

# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
# bug #9016.  Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
# fixes.
#
# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
gcc2-flags() {
        CFLAGS=${CFLAGS//pentium-mmx/i586}
        CFLAGS=${CFLAGS//pentium[234]/i686}
        CFLAGS=${CFLAGS//k6-[23]/k6}
        CFLAGS=${CFLAGS//athlon-tbird/i686}
        CFLAGS=${CFLAGS//athlon-4/i686}
        CFLAGS=${CFLAGS//athlon-[xm]p/i686}
        CFLAGS=${CFLAGS//athlon/i686}

        CXXFLAGS=${CXXFLAGS//pentium-mmx/i586}
        CXXFLAGS=${CXXFLAGS//pentium[234]/i686}
        CXXFLAGS=${CXXFLAGS//k6-[23]/k6}
        CXXFLAGS=${CXXFLAGS//athlon-tbird/i686}
        CXXFLAGS=${CXXFLAGS//athlon-4/i686}
        CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686}
        CXXFLAGS=${CXXFLAGS//athlon/i686}

        if [ "$ARCH" = alpha ]; then
                CHOST=${CHOST/#alphaev6[78]/alphaev6}
                CFLAGS=${CFLAGS//ev6[78]/ev6}
                CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
        fi

        export CFLAGS CXXFLAGS
}
1	vapier	1.60	# Copyright 1999-2004 Gentoo Foundation
2	verwilst	1.1	# Distributed under the terms of the GNU General Public License v2
3	chriswhite	1.79	# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.78 2004/12/22 21:18:35 eradicator Exp $
4	vapier	1.12	#
5	verwilst	1.1	# Author Bart Verwilst <verwilst@gentoo.org>
6	azarah	1.8
7	verwilst	1.1	ECLASS=flag-o-matic
8	danarmak	1.6	INHERITED="$INHERITED $ECLASS"
9	vapier	1.63
10	vapier	1.75	IUSE="debug"
11	azarah	1.8
12	vapier	1.72	# need access to emktemp()
13	kugelfang	1.74	inherit eutils toolchain-funcs
14	vapier	1.72
15	verwilst	1.2	#
16	vapier	1.18	#### filter-flags <flags> ####
17	verwilst	1.3	# Remove particular flags from C[XX]FLAGS
18	vapier	1.18	# Matches only complete flags
19	verwilst	1.2	#
20	vapier	1.18	#### append-flags <flags> ####
21	verwilst	1.3	# Add extra flags to your current C[XX]FLAGS
22			#
23	verwilst	1.4	#### replace-flags <orig.flag> <new.flag> ###
24	verwilst	1.3	# Replace a flag by another one
25			#
26	vapier	1.70	#### replace-cpu-flags <old.cpus> <new.cpu> ###
27	vapier	1.37	# Replace march/mcpu flags that specify <old.cpus>
28			# with flags that specify <new.cpu>
29			#
30	danarmak	1.7	#### is-flag <flag> ####
31			# Returns "true" if flag is set in C[XX]FLAGS
32	vapier	1.18	# Matches only complete a flag
33	danarmak	1.7	#
34	azarah	1.8	#### strip-flags ####
35			# Strip C[XX]FLAGS of everything except known
36			# good options.
37			#
38	puggy	1.29	#### strip-unsupported-flags ####
39			# Strip C[XX]FLAGS of any flags not supported by
40			# installed version of gcc
41			#
42	vapier	1.10	#### get-flag <flag> ####
43			# Find and echo the value for a particular flag
44			#
45	joker	1.16	#### replace-sparc64-flags ####
46			# Sets mcpu to v8 and uses the original value
47			# as mtune if none specified.
48			#
49	vapier	1.26	#### filter-mfpmath <math types> ####
50			# Remove specified math types from the fpmath specification
51			# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
52			# will leave the user with -mfpmath=386
53	solar	1.27	#
54			#### append-ldflags ####
55			# Add extra flags to your current LDFLAGS
56			#
57	solar	1.41	#### filter-ldflags <flags> ####
58			# Remove particular flags from LDFLAGS
59			# Matches only complete flags
60			#
61	solar	1.27	#### etexec-flags ####
62	pappy	1.50	# hooked function for hardened gcc that appends
63			# -fno-pic to {C,CXX,LD}FLAGS
64			# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
65	solar	1.27	#
66			#### fstack-flags ####
67	pappy	1.50	# hooked function for hardened gcc that appends
68			# -fno-stack-protector to {C,CXX,LD}FLAGS
69			# when a package is filtering -fstack-protector, -fstack-protector-all
70			# notice: modern automatic specs files will also suppress -fstack-protector-all
71			# when only -fno-stack-protector is given
72	solar	1.27	#
73	verwilst	1.3
74	azarah	1.17	# C[XX]FLAGS that we allow in strip-flags
75	vapier	1.36	setup-allowed-flags() {
76	vapier	1.44	if [ -z "${ALLOWED_FLAGS}" ] ; then
77	vapier	1.76	export ALLOWED_FLAGS="-pipe"
78			export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
79			export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector"
80			export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
81			export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
82	vapier	1.44	case "${ARCH}" in
83	robbat2	1.71	mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
84	lv	1.51	amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
85			x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
86	vapier	1.44	alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
87	vapier	1.65	ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
88	eradicator	1.78	sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;;
89	chriswhite	1.79	ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;;
90	vapier	1.44	esac
91			fi
92	vapier	1.65	# allow a bunch of flags that negate features / control ABI
93			ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
94			case "${ARCH}" in
95			x86\|amd64\|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
96			esac
97			ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias"
98	vapier	1.36
99			# C[XX]FLAGS that we are think is ok, but needs testing
100			# NOTE: currently -Os have issues with gcc3 and K6* arch's
101			export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
102			return 0
103	aliz	1.24	}
104	verwilst	1.13
105	vapier	1.18	filter-flags() {
106	agriffis	1.61	local x f fset
107			declare -a new_CFLAGS new_CXXFLAGS
108	agriffis	1.58
109	vapier	1.36	for x in "$@" ; do
110	solar	1.27	case "${x}" in
111	solar	1.39	-fPIC\|-fpic\|-fPIE\|-fpie\|-pie) etexec-flags;;
112	solar	1.32	-fstack-protector\|-fstack-protector-all) fstack-flags;;
113	solar	1.27	esac
114			done
115	vapier	1.36
116	agriffis	1.61	for fset in CFLAGS CXXFLAGS; do
117	agriffis	1.64	# Looping over the flags instead of using a global
118			# substitution ensures that we're working with flag atoms.
119			# Otherwise globs like -O* have the potential to wipe out the
120			# list of flags.
121	agriffis	1.61	for f in ${!fset}; do
122			for x in "$@"; do
123			# Note this should work with globs like -O*
124			[[ ${f} == ${x} ]] && continue 2
125			done
126			eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
127			done
128			eval export ${fset}=\${new_${fset}\[*]}
129	verwilst	1.1	done
130	agriffis	1.61
131	vapier	1.36	return 0
132	verwilst	1.2	}
133
134	vapier	1.40	filter-lfs-flags() {
135			filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136			}
137
138	vapier	1.48	append-lfs-flags() {
139			append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
140			}
141
142	vapier	1.18	append-flags() {
143	agriffis	1.58	export CFLAGS="${CFLAGS} $*"
144			export CXXFLAGS="${CXXFLAGS} $*"
145			[ -n "`is-flag -fno-stack-protector`" -o \
146			-n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
147	vapier	1.28	return 0
148	verwilst	1.1	}
149
150	vapier	1.18	replace-flags() {
151	agriffis	1.64	local f fset
152			declare -a new_CFLAGS new_CXXFLAGS
153
154			for fset in CFLAGS CXXFLAGS; do
155			# Looping over the flags instead of using a global
156			# substitution ensures that we're working with flag atoms.
157			# Otherwise globs like -O* have the potential to wipe out the
158			# list of flags.
159			for f in ${!fset}; do
160			# Note this should work with globs like -O*
161			[[ ${f} == ${1} ]] && f=${2}
162			eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
163			done
164			eval export ${fset}=\${new_${fset}\[*]}
165			done
166
167	vapier	1.28	return 0
168	danarmak	1.7	}
169
170	vapier	1.37	replace-cpu-flags() {
171	vapier	1.70	local newcpu="$#" ; newcpu="${!newcpu}"
172			while [ $# -gt 1 ] ; do
173	agriffis	1.64	# quote to make sure that no globbing is done (particularly on
174			# ${oldcpu} prior to calling replace-flags
175	vapier	1.70	replace-flags "-march=${1}" "-march=${newcpu}"
176			replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
177			replace-flags "-mtune=${1}" "-mtune=${newcpu}"
178			shift
179	vapier	1.37	done
180			return 0
181			}
182
183	danarmak	1.7	is-flag() {
184	agriffis	1.58	local x
185
186	vapier	1.18	for x in ${CFLAGS} ${CXXFLAGS} ; do
187	agriffis	1.67	# Note this should work with globs like -mcpu=ultrasparc*
188			if [[ ${x} == ${1} ]]; then
189	azarah	1.8	echo true
190	vapier	1.18	return 0
191			fi
192	danarmak	1.7	done
193	vapier	1.18	return 1
194	verwilst	1.1	}
195	azarah	1.8
196	vapier	1.36	filter-mfpmath() {
197	agriffis	1.58	local orig_mfpmath new_math prune_math
198
199	vapier	1.36	# save the original -mfpmath flag
200	agriffis	1.58	orig_mfpmath="`get-flag -mfpmath`"
201	vapier	1.36	# get the value of the current -mfpmath flag
202	agriffis	1.58	new_math=" `get-flag mfpmath \| tr , ' '` "
203	vapier	1.36	# figure out which math values are to be removed
204	agriffis	1.58	prune_math=""
205	vapier	1.36	for prune_math in "$@" ; do
206			new_math="${new_math/ ${prune_math} / }"
207			done
208			new_math="`echo ${new_math:1:${#new_math}-2} \| tr ' ' ,`"
209
210			if [ -z "${new_math}" ] ; then
211			# if we're removing all user specified math values are
212			# slated for removal, then we just filter the flag
213			filter-flags ${orig_mfpmath}
214			else
215			# if we only want to filter some of the user specified
216			# math values, then we replace the current flag
217			replace-flags ${orig_mfpmath} -mfpmath=${new_math}
218			fi
219			return 0
220			}
221
222	azarah	1.8	strip-flags() {
223	agriffis	1.58	local x y flag NEW_CFLAGS NEW_CXXFLAGS
224
225	vapier	1.36	setup-allowed-flags
226
227	azarah	1.8	local NEW_CFLAGS=""
228			local NEW_CXXFLAGS=""
229
230	azarah	1.17	# Allow unstable C[XX]FLAGS if we are using unstable profile ...
231	vapier	1.49	if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
232			use debug && einfo "Enabling the use of some unstable flags"
233	azarah	1.17	ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
234			fi
235
236	agriffis	1.58	set -f # disable pathname expansion
237	azarah	1.8
238	agriffis	1.58	for x in ${CFLAGS}; do
239			for y in ${ALLOWED_FLAGS}; do
240	lostlogic	1.14	flag=${x%%=*}
241	vapier	1.65	if [ "${flag%%${y}}" = "" ] ; then
242	lostlogic	1.14	NEW_CFLAGS="${NEW_CFLAGS} ${x}"
243			break
244	azarah	1.8	fi
245			done
246			done
247
248	agriffis	1.58	for x in ${CXXFLAGS}; do
249			for y in ${ALLOWED_FLAGS}; do
250	lostlogic	1.14	flag=${x%%=*}
251	vapier	1.65	if [ "${flag%%${y}}" = "" ] ; then
252	lostlogic	1.14	NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
253			break
254	azarah	1.8	fi
255			done
256			done
257	azarah	1.30
258			# In case we filtered out all optimization flags fallback to -O2
259			if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
260			NEW_CFLAGS="${NEW_CFLAGS} -O2"
261			fi
262			if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
263			NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
264			fi
265	azarah	1.8
266	agriffis	1.58	set +f # re-enable pathname expansion
267	azarah	1.8
268			export CFLAGS="${NEW_CFLAGS}"
269			export CXXFLAGS="${NEW_CXXFLAGS}"
270	vapier	1.36	return 0
271	puggy	1.29	}
272
273	vapier	1.36	test_flag() {
274	vapier	1.75	if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
275	agriffis	1.58	printf "%s\n" "$*"
276	vapier	1.36	return 0
277	puggy	1.29	fi
278	vapier	1.36	return 1
279	puggy	1.29	}
280
281	agriffis	1.58	test_version_info() {
282	vapier	1.75	if [[ $($(tc-getCC) --version 2>&1) == $1 ]]; then
283	agriffis	1.58	return 0
284			else
285			return 1
286			fi
287			}
288
289	puggy	1.29	strip-unsupported-flags() {
290	agriffis	1.58	local NEW_CFLAGS NEW_CXXFLAGS
291
292	vapier	1.36	for x in ${CFLAGS} ; do
293	agriffis	1.58	NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
294	puggy	1.29	done
295	vapier	1.36	for x in ${CXXFLAGS} ; do
296	agriffis	1.58	NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
297	puggy	1.29	done
298
299	vapier	1.36	export CFLAGS="${NEW_CFLAGS}"
300			export CXXFLAGS="${NEW_CXXFLAGS}"
301	azarah	1.8	}
302
303	vapier	1.10	get-flag() {
304	agriffis	1.58	local f findflag="$1"
305
306	vapier	1.36	# this code looks a little flaky but seems to work for
307			# everything we want ...
308			# for example, if CFLAGS="-march=i686":
309	agriffis	1.58	# `get-flag -march` == "-march=i686"
310			# `get-flag march` == "i686"
311	vapier	1.10	for f in ${CFLAGS} ${CXXFLAGS} ; do
312			if [ "${f/${findflag}}" != "${f}" ] ; then
313	agriffis	1.58	printf "%s\n" "${f/-${findflag}=}"
314	vapier	1.28	return 0
315	vapier	1.10	fi
316			done
317	vapier	1.28	return 1
318	joker	1.16	}
319
320	solar	1.53	has_hardened() {
321	lv	1.69	test_version_info Hardened && return 0
322			# the specs file wont exist unless gcc has GCC_SPECS support
323			[ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
324			return 0
325			return 1
326	solar	1.53	}
327
328	tseng	1.42	has_pic() {
329			[ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
330			[ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
331	agriffis	1.58	test_version_info pie && return 0
332	tseng	1.42	return 1
333			}
334
335			has_pie() {
336	tseng	1.43	[ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
337			[ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
338	agriffis	1.58	test_version_info pie && return 0
339	tseng	1.42	return 1
340			}
341
342			has_ssp() {
343			[ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
344	agriffis	1.58	test_version_info ssp && return 0
345	tseng	1.42	return 1
346			}
347
348	lv	1.56	has_m64() {
349	lv	1.62	# this doesnt test if the flag is accepted, it tests if the flag
350			# actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
351			# please dont replace this function with test_flag in some future
352			# clean-up!
353	vapier	1.72	local temp="$(emktemp)"
354	lv	1.62	echo "int main() { return(0); }" > ${temp}.c
355	kugelfang	1.74	MY_CC=$(tc-getCC)
356			${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
357	vapier	1.72	local ret=$?
358	lv	1.62	rm -f ${temp}.c
359			[ "$ret" != "1" ] && return 0
360			return 1
361	lv	1.56	}
362
363			has_m32() {
364	lv	1.62	# this doesnt test if the flag is accepted, it tests if the flag
365			# actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
366			# please dont replace this function with test_flag in some future
367			# clean-up!
368	vapier	1.72	local temp="$(emktemp)"
369	lv	1.62	echo "int main() { return(0); }" > ${temp}.c
370	kugelfang	1.74	MY_CC=$(tc-getCC)
371			${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
372	vapier	1.72	local ret=$?
373	lv	1.62	rm -f ${temp}.c
374			[ "$ret" != "1" ] && return 0
375			return 1
376	lv	1.56	}
377
378	vapier	1.18	replace-sparc64-flags() {
379	joker	1.16	local SPARC64_CPUS="ultrasparc v9"
380
381	agriffis	1.58	if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
382			for x in ${SPARC64_CPUS}; do
383	joker	1.16	CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
384			done
385			else
386	agriffis	1.58	for x in ${SPARC64_CPUS}; do
387	joker	1.16	CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
388			done
389			fi
390
391	agriffis	1.58	if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
392			for x in ${SPARC64_CPUS}; do
393	joker	1.16	CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
394			done
395			else
396	agriffis	1.58	for x in ${SPARC64_CPUS}; do
397	joker	1.16	CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
398			done
399			fi
400	vapier	1.59
401			export CFLAGS CXXFLAGS
402	solar	1.27	}
403
404			append-ldflags() {
405	vapier	1.59	export LDFLAGS="${LDFLAGS} $*"
406	vapier	1.28	return 0
407	solar	1.27	}
408
409	solar	1.41	filter-ldflags() {
410	agriffis	1.58	local x
411
412	solar	1.41	# we do this fancy spacing stuff so as to not filter
413			# out part of a flag ... we want flag atoms ! :D
414			LDFLAGS=" ${LDFLAGS} "
415			for x in "$@" ; do
416			LDFLAGS="${LDFLAGS// ${x} / }"
417			done
418			LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
419	vapier	1.59	export LDFLAGS
420	solar	1.41	return 0
421			}
422
423	vapier	1.36	etexec-flags() {
424	agriffis	1.58	# if you're not using a hardened compiler you wont need this
425	solar	1.53	# PIC/no-pic kludge in the first place.
426	agriffis	1.58	has_hardened \|\| return 0
427	lv	1.66	use amd64 && return 0
428	solar	1.77	use mips && return 0
429	pappy	1.50
430	agriffis	1.58	if has_pie \|\| has_pic; then
431			[ -z "`is-flag -fno-pic`" ] &&
432			export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
433			[ -z "`is-flag -nopie`" ] &&
434			export CFLAGS="${CFLAGS} `test_flag -nopie`"
435	solar	1.35	fi
436	agriffis	1.58	return 0
437	solar	1.27	}
438
439			fstack-flags() {
440	agriffis	1.58	if has_ssp; then
441			[ -z "`is-flag -fno-stack-protector`" ] &&
442			export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
443	solar	1.35	fi
444	agriffis	1.58	return 0
445	vapier	1.10	}
446	vapier	1.73
447			# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
448			# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
449			# fixes.
450			#
451			# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
452			gcc2-flags() {
453			CFLAGS=${CFLAGS//pentium-mmx/i586}
454			CFLAGS=${CFLAGS//pentium[234]/i686}
455			CFLAGS=${CFLAGS//k6-[23]/k6}
456			CFLAGS=${CFLAGS//athlon-tbird/i686}
457			CFLAGS=${CFLAGS//athlon-4/i686}
458			CFLAGS=${CFLAGS//athlon-[xm]p/i686}
459			CFLAGS=${CFLAGS//athlon/i686}
460
461			CXXFLAGS=${CXXFLAGS//pentium-mmx/i586}
462			CXXFLAGS=${CXXFLAGS//pentium[234]/i686}
463			CXXFLAGS=${CXXFLAGS//k6-[23]/k6}
464			CXXFLAGS=${CXXFLAGS//athlon-tbird/i686}
465			CXXFLAGS=${CXXFLAGS//athlon-4/i686}
466			CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686}
467			CXXFLAGS=${CXXFLAGS//athlon/i686}
468
469			if [ "$ARCH" = alpha ]; then
470			CHOST=${CHOST/#alphaev6[78]/alphaev6}
471			CFLAGS=${CFLAGS//ev6[78]/ev6}
472			CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
473			fi
474
475			export CFLAGS CXXFLAGS
476			}