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 1.63 2004/07/18 04:59:30 vapier Exp $
#
# Author Bart Verwilst <verwilst@gentoo.org>

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

# Please leave ${IUSE} in this until portage .51 is stable, otherwise
# IUSE gets clobbered.
IUSE="${IUSE} debug"

#
#### 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 <new.cpu> <old.cpus> ###
# 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 "${ALLOWED_FLAGS}" ] ; then
                export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g"
                case "${ARCH}" in
                        mips)   ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
                        amd64)  ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
                        x86)    ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
                        alpha)  ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
                        ia64)   ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
                esac
        fi

        # 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 oldcpu newcpu="$1" ; shift
        for oldcpu in "$@" ; do
                # quote to make sure that no globbing is done (particularly on
                # ${oldcpu} prior to calling replace-flags
                replace-flags "-march=${oldcpu}" "-march=${newcpu}"
                replace-flags "-mcpu=${oldcpu}" "-mcpu=${newcpu}"
                replace-flags "-mtune=${oldcpu}" "-mtune=${newcpu}"
        done
        return 0
}

is-flag() {
        local x

        for x in ${CFLAGS} ${CXXFLAGS} ; do
                if [ "${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}}" = "" ] || [ "${flag:0:5}" = "-fno-" ] || [ "${flag:0:5}" = "-mno-" ] ; 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}}" = "" ] || [ "${flag:0:5}" = "-fno-" ] || [ "${flag:0:5}" = "-mno-" ] ; 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() {
        local cc=${CC:-gcc} ; cc=${cc%% *}
        if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
                printf "%s\n" "$*"
                return 0
        fi
        return 1
}

test_version_info() {
        local cc=${CC:-gcc} ; cc=${cc%% *}
        if [[ $(${cc} --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 $?
}

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!
        temp=`mktemp`
        echo "int main() { return(0); }" > ${temp}.c
        ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1
        ret=$?
        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!
        temp=`mktemp`
        echo "int main() { return(0); }" > ${temp}.c
        ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1
        ret=$?
        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

        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
}
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	agriffis	1.64	# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.63 2004/07/18 04:59:30 vapier 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	agriffis	1.64	# Please leave ${IUSE} in this until portage .51 is stable, otherwise
11			# IUSE gets clobbered.
12			IUSE="${IUSE} debug"
13	azarah	1.8
14	verwilst	1.2	#
15	vapier	1.18	#### filter-flags <flags> ####
16	verwilst	1.3	# Remove particular flags from C[XX]FLAGS
17	vapier	1.18	# Matches only complete flags
18	verwilst	1.2	#
19	vapier	1.18	#### append-flags <flags> ####
20	verwilst	1.3	# Add extra flags to your current C[XX]FLAGS
21			#
22	verwilst	1.4	#### replace-flags <orig.flag> <new.flag> ###
23	verwilst	1.3	# Replace a flag by another one
24			#
25	vapier	1.37	#### replace-cpu-flags <new.cpu> <old.cpus> ###
26			# Replace march/mcpu flags that specify <old.cpus>
27			# with flags that specify <new.cpu>
28			#
29	danarmak	1.7	#### is-flag <flag> ####
30			# Returns "true" if flag is set in C[XX]FLAGS
31	vapier	1.18	# Matches only complete a flag
32	danarmak	1.7	#
33	azarah	1.8	#### strip-flags ####
34			# Strip C[XX]FLAGS of everything except known
35			# good options.
36			#
37	puggy	1.29	#### strip-unsupported-flags ####
38			# Strip C[XX]FLAGS of any flags not supported by
39			# installed version of gcc
40			#
41	vapier	1.10	#### get-flag <flag> ####
42			# Find and echo the value for a particular flag
43			#
44	joker	1.16	#### replace-sparc64-flags ####
45			# Sets mcpu to v8 and uses the original value
46			# as mtune if none specified.
47			#
48	vapier	1.26	#### filter-mfpmath <math types> ####
49			# Remove specified math types from the fpmath specification
50			# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
51			# will leave the user with -mfpmath=386
52	solar	1.27	#
53			#### append-ldflags ####
54			# Add extra flags to your current LDFLAGS
55			#
56	solar	1.41	#### filter-ldflags <flags> ####
57			# Remove particular flags from LDFLAGS
58			# Matches only complete flags
59			#
60	solar	1.27	#### etexec-flags ####
61	pappy	1.50	# hooked function for hardened gcc that appends
62			# -fno-pic to {C,CXX,LD}FLAGS
63			# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
64	solar	1.27	#
65			#### fstack-flags ####
66	pappy	1.50	# hooked function for hardened gcc that appends
67			# -fno-stack-protector to {C,CXX,LD}FLAGS
68			# when a package is filtering -fstack-protector, -fstack-protector-all
69			# notice: modern automatic specs files will also suppress -fstack-protector-all
70			# when only -fno-stack-protector is given
71	solar	1.27	#
72	verwilst	1.3
73	azarah	1.17	# C[XX]FLAGS that we allow in strip-flags
74	vapier	1.36	setup-allowed-flags() {
75	vapier	1.44	if [ -z "${ALLOWED_FLAGS}" ] ; then
76	lv	1.52	export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g"
77	vapier	1.44	case "${ARCH}" in
78			mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
79	lv	1.51	amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
80			x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
81	vapier	1.44	alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
82			ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
83			esac
84			fi
85	vapier	1.36
86			# C[XX]FLAGS that we are think is ok, but needs testing
87			# NOTE: currently -Os have issues with gcc3 and K6* arch's
88			export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
89			return 0
90	aliz	1.24	}
91	verwilst	1.13
92	vapier	1.18	filter-flags() {
93	agriffis	1.61	local x f fset
94			declare -a new_CFLAGS new_CXXFLAGS
95	agriffis	1.58
96	vapier	1.36	for x in "$@" ; do
97	solar	1.27	case "${x}" in
98	solar	1.39	-fPIC\|-fpic\|-fPIE\|-fpie\|-pie) etexec-flags;;
99	solar	1.32	-fstack-protector\|-fstack-protector-all) fstack-flags;;
100	solar	1.27	esac
101			done
102	vapier	1.36
103	agriffis	1.61	for fset in CFLAGS CXXFLAGS; do
104	agriffis	1.64	# Looping over the flags instead of using a global
105			# substitution ensures that we're working with flag atoms.
106			# Otherwise globs like -O* have the potential to wipe out the
107			# list of flags.
108	agriffis	1.61	for f in ${!fset}; do
109			for x in "$@"; do
110			# Note this should work with globs like -O*
111			[[ ${f} == ${x} ]] && continue 2
112			done
113			eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
114			done
115			eval export ${fset}=\${new_${fset}\[*]}
116	verwilst	1.1	done
117	agriffis	1.61
118	vapier	1.36	return 0
119	verwilst	1.2	}
120
121	vapier	1.40	filter-lfs-flags() {
122			filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
123			}
124
125	vapier	1.48	append-lfs-flags() {
126			append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
127			}
128
129	vapier	1.18	append-flags() {
130	agriffis	1.58	export CFLAGS="${CFLAGS} $*"
131			export CXXFLAGS="${CXXFLAGS} $*"
132			[ -n "`is-flag -fno-stack-protector`" -o \
133			-n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
134	vapier	1.28	return 0
135	verwilst	1.1	}
136
137	vapier	1.18	replace-flags() {
138	agriffis	1.64	local f fset
139			declare -a new_CFLAGS new_CXXFLAGS
140
141			for fset in CFLAGS CXXFLAGS; do
142			# Looping over the flags instead of using a global
143			# substitution ensures that we're working with flag atoms.
144			# Otherwise globs like -O* have the potential to wipe out the
145			# list of flags.
146			for f in ${!fset}; do
147			# Note this should work with globs like -O*
148			[[ ${f} == ${1} ]] && f=${2}
149			eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
150			done
151			eval export ${fset}=\${new_${fset}\[*]}
152			done
153
154	vapier	1.28	return 0
155	danarmak	1.7	}
156
157	vapier	1.37	replace-cpu-flags() {
158	agriffis	1.58	local oldcpu newcpu="$1" ; shift
159	vapier	1.37	for oldcpu in "$@" ; do
160	agriffis	1.64	# quote to make sure that no globbing is done (particularly on
161			# ${oldcpu} prior to calling replace-flags
162			replace-flags "-march=${oldcpu}" "-march=${newcpu}"
163			replace-flags "-mcpu=${oldcpu}" "-mcpu=${newcpu}"
164			replace-flags "-mtune=${oldcpu}" "-mtune=${newcpu}"
165	vapier	1.37	done
166			return 0
167			}
168
169	danarmak	1.7	is-flag() {
170	agriffis	1.58	local x
171
172	vapier	1.18	for x in ${CFLAGS} ${CXXFLAGS} ; do
173			if [ "${x}" == "$1" ] ; then
174	azarah	1.8	echo true
175	vapier	1.18	return 0
176			fi
177	danarmak	1.7	done
178	vapier	1.18	return 1
179	verwilst	1.1	}
180	azarah	1.8
181	vapier	1.36	filter-mfpmath() {
182	agriffis	1.58	local orig_mfpmath new_math prune_math
183
184	vapier	1.36	# save the original -mfpmath flag
185	agriffis	1.58	orig_mfpmath="`get-flag -mfpmath`"
186	vapier	1.36	# get the value of the current -mfpmath flag
187	agriffis	1.58	new_math=" `get-flag mfpmath \| tr , ' '` "
188	vapier	1.36	# figure out which math values are to be removed
189	agriffis	1.58	prune_math=""
190	vapier	1.36	for prune_math in "$@" ; do
191			new_math="${new_math/ ${prune_math} / }"
192			done
193			new_math="`echo ${new_math:1:${#new_math}-2} \| tr ' ' ,`"
194
195			if [ -z "${new_math}" ] ; then
196			# if we're removing all user specified math values are
197			# slated for removal, then we just filter the flag
198			filter-flags ${orig_mfpmath}
199			else
200			# if we only want to filter some of the user specified
201			# math values, then we replace the current flag
202			replace-flags ${orig_mfpmath} -mfpmath=${new_math}
203			fi
204			return 0
205			}
206
207	azarah	1.8	strip-flags() {
208	agriffis	1.58	local x y flag NEW_CFLAGS NEW_CXXFLAGS
209
210	vapier	1.36	setup-allowed-flags
211
212	azarah	1.8	local NEW_CFLAGS=""
213			local NEW_CXXFLAGS=""
214
215	azarah	1.17	# Allow unstable C[XX]FLAGS if we are using unstable profile ...
216	vapier	1.49	if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
217			use debug && einfo "Enabling the use of some unstable flags"
218	azarah	1.17	ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
219			fi
220
221	agriffis	1.58	set -f # disable pathname expansion
222	azarah	1.8
223	agriffis	1.58	for x in ${CFLAGS}; do
224			for y in ${ALLOWED_FLAGS}; do
225	lostlogic	1.14	flag=${x%%=*}
226	vapier	1.63	if [ "${flag%%${y}}" = "" ] \|\| [ "${flag:0:5}" = "-fno-" ] \|\| [ "${flag:0:5}" = "-mno-" ] ; then
227	lostlogic	1.14	NEW_CFLAGS="${NEW_CFLAGS} ${x}"
228			break
229	azarah	1.8	fi
230			done
231			done
232
233	agriffis	1.58	for x in ${CXXFLAGS}; do
234			for y in ${ALLOWED_FLAGS}; do
235	lostlogic	1.14	flag=${x%%=*}
236	vapier	1.63	if [ "${flag%%${y}}" = "" ] \|\| [ "${flag:0:5}" = "-fno-" ] \|\| [ "${flag:0:5}" = "-mno-" ] ; then
237	lostlogic	1.14	NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
238			break
239	azarah	1.8	fi
240			done
241			done
242	azarah	1.30
243			# In case we filtered out all optimization flags fallback to -O2
244			if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
245			NEW_CFLAGS="${NEW_CFLAGS} -O2"
246			fi
247			if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
248			NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
249			fi
250	azarah	1.8
251	agriffis	1.58	set +f # re-enable pathname expansion
252	azarah	1.8
253			export CFLAGS="${NEW_CFLAGS}"
254			export CXXFLAGS="${NEW_CXXFLAGS}"
255	vapier	1.36	return 0
256	puggy	1.29	}
257
258	vapier	1.36	test_flag() {
259	agriffis	1.58	local cc=${CC:-gcc} ; cc=${cc%% *}
260			if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
261			printf "%s\n" "$*"
262	vapier	1.36	return 0
263	puggy	1.29	fi
264	vapier	1.36	return 1
265	puggy	1.29	}
266
267	agriffis	1.58	test_version_info() {
268			local cc=${CC:-gcc} ; cc=${cc%% *}
269			if [[ $(${cc} --version 2>&1) == $1 ]]; then
270			return 0
271			else
272			return 1
273			fi
274			}
275
276	puggy	1.29	strip-unsupported-flags() {
277	agriffis	1.58	local NEW_CFLAGS NEW_CXXFLAGS
278
279	vapier	1.36	for x in ${CFLAGS} ; do
280	agriffis	1.58	NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
281	puggy	1.29	done
282	vapier	1.36	for x in ${CXXFLAGS} ; do
283	agriffis	1.58	NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
284	puggy	1.29	done
285
286	vapier	1.36	export CFLAGS="${NEW_CFLAGS}"
287			export CXXFLAGS="${NEW_CXXFLAGS}"
288	azarah	1.8	}
289
290	vapier	1.10	get-flag() {
291	agriffis	1.58	local f findflag="$1"
292
293	vapier	1.36	# this code looks a little flaky but seems to work for
294			# everything we want ...
295			# for example, if CFLAGS="-march=i686":
296	agriffis	1.58	# `get-flag -march` == "-march=i686"
297			# `get-flag march` == "i686"
298	vapier	1.10	for f in ${CFLAGS} ${CXXFLAGS} ; do
299			if [ "${f/${findflag}}" != "${f}" ] ; then
300	agriffis	1.58	printf "%s\n" "${f/-${findflag}=}"
301	vapier	1.28	return 0
302	vapier	1.10	fi
303			done
304	vapier	1.28	return 1
305	joker	1.16	}
306
307	solar	1.53	has_hardened() {
308	agriffis	1.58	test_version_info Hardened
309	solar	1.53	return $?
310			}
311
312	tseng	1.42	has_pic() {
313			[ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
314			[ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
315	agriffis	1.58	test_version_info pie && return 0
316	tseng	1.42	return 1
317			}
318
319			has_pie() {
320	tseng	1.43	[ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
321			[ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
322	agriffis	1.58	test_version_info pie && return 0
323	tseng	1.42	return 1
324			}
325
326			has_ssp() {
327			[ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
328	agriffis	1.58	test_version_info ssp && return 0
329	tseng	1.42	return 1
330			}
331
332	lv	1.56	has_m64() {
333	lv	1.62	# this doesnt test if the flag is accepted, it tests if the flag
334			# actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
335			# please dont replace this function with test_flag in some future
336			# clean-up!
337			temp=`mktemp`
338			echo "int main() { return(0); }" > ${temp}.c
339			${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1
340			ret=$?
341			rm -f ${temp}.c
342			[ "$ret" != "1" ] && return 0
343			return 1
344	lv	1.56	}
345
346			has_m32() {
347	lv	1.62	# this doesnt test if the flag is accepted, it tests if the flag
348			# actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
349			# please dont replace this function with test_flag in some future
350			# clean-up!
351			temp=`mktemp`
352			echo "int main() { return(0); }" > ${temp}.c
353			${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1
354			ret=$?
355			rm -f ${temp}.c
356			[ "$ret" != "1" ] && return 0
357			return 1
358	lv	1.56	}
359
360	vapier	1.18	replace-sparc64-flags() {
361	joker	1.16	local SPARC64_CPUS="ultrasparc v9"
362
363	agriffis	1.58	if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
364			for x in ${SPARC64_CPUS}; do
365	joker	1.16	CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
366			done
367			else
368	agriffis	1.58	for x in ${SPARC64_CPUS}; do
369	joker	1.16	CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
370			done
371			fi
372
373	agriffis	1.58	if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
374			for x in ${SPARC64_CPUS}; do
375	joker	1.16	CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
376			done
377			else
378	agriffis	1.58	for x in ${SPARC64_CPUS}; do
379	joker	1.16	CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
380			done
381			fi
382	vapier	1.59
383			export CFLAGS CXXFLAGS
384	solar	1.27	}
385
386			append-ldflags() {
387	vapier	1.59	export LDFLAGS="${LDFLAGS} $*"
388	vapier	1.28	return 0
389	solar	1.27	}
390
391	solar	1.41	filter-ldflags() {
392	agriffis	1.58	local x
393
394	solar	1.41	# we do this fancy spacing stuff so as to not filter
395			# out part of a flag ... we want flag atoms ! :D
396			LDFLAGS=" ${LDFLAGS} "
397			for x in "$@" ; do
398			LDFLAGS="${LDFLAGS// ${x} / }"
399			done
400			LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
401	vapier	1.59	export LDFLAGS
402	solar	1.41	return 0
403			}
404
405	vapier	1.36	etexec-flags() {
406	agriffis	1.58	# if you're not using a hardened compiler you wont need this
407	solar	1.53	# PIC/no-pic kludge in the first place.
408	agriffis	1.58	has_hardened \|\| return 0
409	pappy	1.50
410	agriffis	1.58	if has_pie \|\| has_pic; then
411			[ -z "`is-flag -fno-pic`" ] &&
412			export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
413			[ -z "`is-flag -nopie`" ] &&
414			export CFLAGS="${CFLAGS} `test_flag -nopie`"
415	solar	1.35	fi
416	agriffis	1.58	return 0
417	solar	1.27	}
418
419			fstack-flags() {
420	agriffis	1.58	if has_ssp; then
421			[ -z "`is-flag -fno-stack-protector`" ] &&
422			export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
423	solar	1.35	fi
424	agriffis	1.58	return 0
425	vapier	1.10	}