/[gentoo-x86]/eclass/flag-o-matic.eclass
Gentoo

Diff of /eclass/flag-o-matic.eclass

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

Revision 1.41 Revision 1.123
1# Copyright 1999-2003 Gentoo Technologies, Inc. 1# Copyright 1999-2008 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.41 2004/03/16 21:37:09 solar Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.123 2008/06/07 16:42:32 flameeyes Exp $
4
5# @ECLASS: flag-o-matic.eclass
6# @MAINTAINER:
7# toolchain@gentoo.org
8# @BLURB: common functions to manipulate and query toolchain flags
9# @DESCRIPTION:
10# This eclass contains a suite of functions to help developers sanely
11# and safely manage toolchain flags in their builds.
12
13inherit eutils toolchain-funcs multilib
14
15################ DEPRECATED functions ################
16# The following are still present to avoid breaking existing
17# code more than necessary; however they are deprecated. Please
18# use gcc-specs-* from toolchain-funcs.eclass instead, if you
19# need to know which hardened techs are active in the compiler.
20# See bug #100974
4# 21#
5# Author Bart Verwilst <verwilst@gentoo.org> 22# has_hardened
23# has_pie
24# has_pic
25# has_ssp_all
26# has_ssp
6 27
7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS"
9
10#
11#### filter-flags <flags> ####
12# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags
14#
15#### append-flags <flags> ####
16# Add extra flags to your current C[XX]FLAGS
17#
18#### replace-flags <orig.flag> <new.flag> ###
19# Replace a flag by another one
20#
21#### replace-cpu-flags <new.cpu> <old.cpus> ###
22# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu>
24#
25#### is-flag <flag> ####
26# Returns "true" if flag is set in C[XX]FLAGS
27# Matches only complete a flag
28#
29#### strip-flags ####
30# Strip C[XX]FLAGS of everything except known
31# good options.
32#
33#### strip-unsupported-flags ####
34# Strip C[XX]FLAGS of any flags not supported by
35# installed version of gcc
36#
37#### get-flag <flag> ####
38# Find and echo the value for a particular flag
39#
40#### replace-sparc64-flags ####
41# Sets mcpu to v8 and uses the original value
42# as mtune if none specified.
43#
44#### filter-mfpmath <math types> ####
45# Remove specified math types from the fpmath specification
46# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
47# will leave the user with -mfpmath=386
48#
49#### append-ldflags ####
50# Add extra flags to your current LDFLAGS
51#
52#### filter-ldflags <flags> ####
53# Remove particular flags from LDFLAGS
54# Matches only complete flags
55#
56#### etexec-flags ####
57# hooked function for hardened-gcc that appends
58# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
59# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
60#
61#### fstack-flags ####
62# hooked function for hardened-gcc that appends
63# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
64# and a package is filtering -fstack-protector, -fstack-protector-all
65#
66 28
67# C[XX]FLAGS that we allow in strip-flags 29# C[XX]FLAGS that we allow in strip-flags
30# Note: shell globs and character lists are allowed
68setup-allowed-flags() { 31setup-allowed-flags() {
69 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
70 case "${ARCH}" in 33 export ALLOWED_FLAGS="-pipe"
71 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
72 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking"
37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
73 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
74 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 41 fi
75 esac 42 # allow a bunch of flags that negate features / control ABI
43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking"
45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
49 -mieee -mieee-with-inexact -mschedule \
50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
54 -msecure-plt -D*"
76 55
77 # C[XX]FLAGS that we are think is ok, but needs testing 56 # C[XX]FLAGS that we are think is ok, but needs testing
78 # NOTE: currently -Os have issues with gcc3 and K6* arch's 57 # NOTE: currently -Os have issues with gcc3 and K6* arch's
79 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
80 return 0 59 return 0
81} 60}
82 61
62# inverted filters for hardened compiler. This is trying to unpick
63# the hardened compiler defaults.
64_filter-hardened() {
65 local f
66 for f in "$@" ; do
67 case "${f}" in
68 # Ideally we should only concern ourselves with PIE flags,
69 # not -fPIC or -fpic, but too many places filter -fPIC without
70 # thinking about -fPIE.
71 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
72 gcc-specs-pie || continue
73 is-flagq -nopie || append-flags -nopie;;
74 -fstack-protector)
75 gcc-specs-ssp || continue
76 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
77 -fstack-protector-all)
78 gcc-specs-ssp-to-all || continue
79 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
80 esac
81 done
82}
83
84# Remove occurrences of strings from variable given in $1
85# Strings removed are matched as globs, so for example
86# '-O*' would remove -O1, -O2 etc.
87_filter-var() {
88 local f x VAR VAL
89 declare -a new
90
91 VAR=$1
92 shift
93 eval VAL=\${${VAR}}
94 for f in ${VAL}; do
95 for x in "$@"; do
96 # Note this should work with globs like -O*
97 [[ ${f} == ${x} ]] && continue 2
98 done
99 eval new\[\${\#new\[@]}]=\${f}
100 done
101 eval export ${VAR}=\${new\[*]}
102}
103
104# @FUNCTION: filter-flags
105# @USAGE: <flags>
106# @DESCRIPTION:
107# Remove particular <flags> from {C,CPP,CXX}FLAGS. Accepts shell globs.
83filter-flags() { 108filter-flags() {
84 for x in "$@" ; do 109 _filter-hardened "$@"
85 case "${x}" in 110 _filter-var CFLAGS "$@"
86 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 111 _filter-var CPPFLAGS "$@"
87 -fstack-protector|-fstack-protector-all) fstack-flags;; 112 _filter-var CXXFLAGS "$@"
88 *) ;;
89 esac
90 done
91
92 # we do this fancy spacing stuff so as to not filter
93 # out part of a flag ... we want flag atoms ! :D
94 CFLAGS=" ${CFLAGS} "
95 CXXFLAGS=" ${CXXFLAGS} "
96 for x in "$@" ; do
97 CFLAGS="${CFLAGS// ${x} / }"
98 CXXFLAGS="${CXXFLAGS// ${x} / }"
99 done
100 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
101 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
102 return 0 113 return 0
103} 114}
104 115
116# @FUNCTION: filter-lfs-flags
117# @DESCRIPTION:
118# Remove flags that enable Large File Support.
105filter-lfs-flags() { 119filter-lfs-flags() {
120 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
106 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 121 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
107} 122}
108 123
124# @FUNCTION: append-cppflags
125# @USAGE: <flags>
126# @DESCRIPTION:
127# Add extra <flags> to the current CPPFLAGS.
128append-cppflags() {
129 [[ -z $* ]] && return 0
130 export CPPFLAGS="${CPPFLAGS} $*"
131 return 0
132}
133
134# @FUNCTION: append-lfs-flags
135# @DESCRIPTION:
136# Add flags that enable Large File Support.
137append-lfs-flags() {
138 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
139 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
140}
141
142# @FUNCTION: append-flags
143# @USAGE: <flags>
144# @DESCRIPTION:
145# Add extra <flags> to your current C[XX]FLAGS.
109append-flags() { 146append-flags() {
147 [[ -z $* ]] && return 0
110 export CFLAGS="${CFLAGS} $@" 148 export CFLAGS="${CFLAGS} $*"
111 export CXXFLAGS="${CXXFLAGS} $@" 149 export CXXFLAGS="${CXXFLAGS} $*"
112 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
113 return 0 150 return 0
114} 151}
115 152
153# @FUNCTION: replace-flags
154# @USAGE: <old> <new>
155# @DESCRIPTION:
156# Replace the <old> flag with <new>. Accepts shell globs for <old>.
116replace-flags() { 157replace-flags() {
117 # we do this fancy spacing stuff so as to not filter 158 [[ $# != 2 ]] \
118 # out part of a flag ... we want flag atoms ! :D 159 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
119 CFLAGS=" ${CFLAGS} " 160 && die "replace-flags takes 2 arguments, not $#"
120 CXXFLAGS=" ${CXXFLAGS} "
121 CFLAGS="${CFLAGS// ${1} / ${2} }"
122 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
123 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
124 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
125 return 0
126}
127 161
162 local f fset
163 declare -a new_CFLAGS new_CXXFLAGS
164
165 for fset in CFLAGS CXXFLAGS; do
166 # Looping over the flags instead of using a global
167 # substitution ensures that we're working with flag atoms.
168 # Otherwise globs like -O* have the potential to wipe out the
169 # list of flags.
170 for f in ${!fset}; do
171 # Note this should work with globs like -O*
172 [[ ${f} == ${1} ]] && f=${2}
173 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
174 done
175 eval export ${fset}=\${new_${fset}\[*]}
176 done
177
178 return 0
179}
180
181# @FUNCTION: replace-cpu-flags
182# @USAGE: <old> <new>
183# @DESCRIPTION:
184# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
185# with flags that select the <new> cpu. Accepts shell globs for <old>.
128replace-cpu-flags() { 186replace-cpu-flags() {
129 local newcpu="$1" ; shift 187 local newcpu="$#" ; newcpu="${!newcpu}"
130 local oldcpu="" 188 while [ $# -gt 1 ] ; do
131 for oldcpu in "$@" ; do 189 # quote to make sure that no globbing is done (particularly on
190 # ${oldcpu}) prior to calling replace-flags
132 replace-flags -march=${oldcpu} -march=${newcpu} 191 replace-flags "-march=${1}" "-march=${newcpu}"
133 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 192 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
134 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 193 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
194 shift
135 done 195 done
196 return 0
197}
198
199_is_flagq() {
200 local x
201 for x in ${!1} ; do
202 [[ ${x} == $2 ]] && return 0
203 done
136 return 0 204 return 1
137} 205}
138 206
207# @FUNCTION: is-flagq
208# @USAGE: <flag>
209# @DESCRIPTION:
210# Returns shell true if <flag> is in C[XX]FLAGS, else returns shell false. Accepts shell globs.
211is-flagq() {
212 [[ -n $2 ]] && die "Usage: is-flag <flag>"
213 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1
214}
215
216# @FUNCTION: is-flag
217# @USAGE: <flag>
218# @DESCRIPTION:
219# Echo's "true" if flag is set in C[XX]FLAGS. Accepts shell globs.
139is-flag() { 220is-flag() {
140 for x in ${CFLAGS} ${CXXFLAGS} ; do 221 is-flagq "$@" && echo true
141 if [ "${x}" == "$1" ] ; then
142 echo true
143 return 0
144 fi
145 done
146 return 1
147} 222}
148 223
224# @FUNCTION: is-ldflagq
225# @USAGE: <flag>
226# @DESCRIPTION:
227# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
228is-ldflagq() {
229 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
230 _is_flagq LDFLAGS $1
231}
232
233# @FUNCTION: is-ldflag
234# @USAGE: <flag>
235# @DESCRIPTION:
236# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
237is-ldflag() {
238 is-ldflagq "$@" && echo true
239}
240
241# @FUNCTION: filter-mfpmath
242# @USAGE: <math types>
243# @DESCRIPTION:
244# Remove specified math types from the fpmath flag. For example, if the user
245# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
246# -mfpmath=386.
149filter-mfpmath() { 247filter-mfpmath() {
248 local orig_mfpmath new_math prune_math
249
150 # save the original -mfpmath flag 250 # save the original -mfpmath flag
151 local orig_mfpmath="`get-flag -mfpmath`" 251 orig_mfpmath=$(get-flag -mfpmath)
152 # get the value of the current -mfpmath flag 252 # get the value of the current -mfpmath flag
153 local new_math=" `get-flag mfpmath | tr , ' '` " 253 new_math=$(get-flag mfpmath)
254 new_math=" ${new_math//,/ } "
154 # figure out which math values are to be removed 255 # figure out which math values are to be removed
155 local prune_math="" 256 prune_math=""
156 for prune_math in "$@" ; do 257 for prune_math in "$@" ; do
157 new_math="${new_math/ ${prune_math} / }" 258 new_math=${new_math/ ${prune_math} / }
158 done 259 done
159 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 260 new_math=$(echo ${new_math})
261 new_math=${new_math// /,}
160 262
161 if [ -z "${new_math}" ] ; then 263 if [[ -z ${new_math} ]] ; then
162 # if we're removing all user specified math values are 264 # if we're removing all user specified math values are
163 # slated for removal, then we just filter the flag 265 # slated for removal, then we just filter the flag
164 filter-flags ${orig_mfpmath} 266 filter-flags ${orig_mfpmath}
165 else 267 else
166 # if we only want to filter some of the user specified 268 # if we only want to filter some of the user specified
168 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 270 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
169 fi 271 fi
170 return 0 272 return 0
171} 273}
172 274
275# @FUNCTION: strip-flags
276# @DESCRIPTION:
277# Strip C[XX]FLAGS of everything except known good/safe flags.
173strip-flags() { 278strip-flags() {
279 local x y flag NEW_CFLAGS NEW_CXXFLAGS
280
174 setup-allowed-flags 281 setup-allowed-flags
175 282
176 local NEW_CFLAGS="" 283 local NEW_CFLAGS=""
177 local NEW_CXXFLAGS="" 284 local NEW_CXXFLAGS=""
178 285
179 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 286 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
180 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 287 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
181 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
182 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 288 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
183 fi 289 fi
184 290
185 set -f 291 set -f # disable pathname expansion
186 292
187 for x in ${CFLAGS} 293 for x in ${CFLAGS}; do
188 do
189 for y in ${ALLOWED_FLAGS} 294 for y in ${ALLOWED_FLAGS}; do
190 do
191 flag=${x%%=*} 295 flag=${x%%=*}
192 if [ "${flag%%${y}}" = "" ] 296 if [ "${flag%%${y}}" = "" ] ; then
193 then
194 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 297 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
195 break 298 break
196 fi 299 fi
197 done 300 done
198 done 301 done
199 302
200 for x in ${CXXFLAGS} 303 for x in ${CXXFLAGS}; do
201 do
202 for y in ${ALLOWED_FLAGS} 304 for y in ${ALLOWED_FLAGS}; do
203 do
204 flag=${x%%=*} 305 flag=${x%%=*}
205 if [ "${flag%%${y}}" = "" ] 306 if [ "${flag%%${y}}" = "" ] ; then
206 then
207 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 307 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
208 break 308 break
209 fi 309 fi
210 done 310 done
211 done 311 done
216 fi 316 fi
217 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 317 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
218 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 318 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
219 fi 319 fi
220 320
221 set +f 321 set +f # re-enable pathname expansion
222
223 [ `use debug` ] \
224 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
225 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
226 322
227 export CFLAGS="${NEW_CFLAGS}" 323 export CFLAGS="${NEW_CFLAGS}"
228 export CXXFLAGS="${NEW_CXXFLAGS}" 324 export CXXFLAGS="${NEW_CXXFLAGS}"
229 return 0 325 return 0
230} 326}
231 327
328test-flag-PROG() {
329 local comp=$1
330 local flags="$2"
331
332 [[ -z ${comp} || -z ${flags} ]] && \
333 return 1
334
335 local PROG=$(tc-get${comp})
336 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
337 > /dev/null 2>&1
338}
339
340# @FUNCTION: test-flag-CC
341# @USAGE: <flag>
342# @DESCRIPTION:
343# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
344test-flag-CC() { test-flag-PROG "CC" "$1"; }
345
346# @FUNCTION: test-flag-CXX
347# @USAGE: <flag>
348# @DESCRIPTION:
349# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
350test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
351
352test-flags-PROG() {
353 local comp=$1
354 local flags
355 local x
356
357 shift
358
359 [[ -z ${comp} ]] && return 1
360
361 x=""
362 for x in "$@" ; do
363 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
364 done
365
366 echo "${flags}"
367
368 # Just bail if we dont have any flags
369 [[ -n ${flags} ]]
370}
371
372# @FUNCTION: test-flags-CC
373# @USAGE: <flags>
374# @DESCRIPTION:
375# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
376test-flags-CC() { test-flags-PROG "CC" "$@"; }
377
378# @FUNCTION: test-flags-CXX
379# @USAGE: <flags>
380# @DESCRIPTION:
381# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
382test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
383
384# @FUNCTION: test-flags
385# @USAGE: <flags>
386# @DESCRIPTION:
387# Short-hand that should hopefully work for both C and C++ compiler, but
388# its really only present due to the append-flags() abomination.
389test-flags() { test-flags-CC "$@"; }
390
391# @FUNCTION: test_flag
392# @DESCRIPTION:
393# DEPRICIATED, use test-flags()
232test_flag() { 394test_flag() {
233 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then 395 ewarn "test_flag: deprecated, please use test-flags()!" >&2
234 echo "$@" 396
397 test-flags-CC "$@"
398}
399
400# @FUNCTION: test_version_info
401# @USAGE: <version>
402# @DESCRIPTION:
403# Returns shell true if the current C compiler version matches <version>, else returns shell false.
404# Accepts shell globs.
405test_version_info() {
406 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
235 return 0 407 return 0
236 fi 408 else
237 return 1 409 return 1
410 fi
238} 411}
239 412
413# @FUNCTION: strip-unsupported-flags
414# @DESCRIPTION:
415# Strip C[XX]FLAGS of any flags not supported by the active toolchain.
240strip-unsupported-flags() { 416strip-unsupported-flags() {
241 for x in ${CFLAGS} ; do 417 export CFLAGS=$(test-flags-CC ${CFLAGS})
242 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 418 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
243 done
244 for x in ${CXXFLAGS} ; do
245 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
246 done
247
248 export CFLAGS="${NEW_CFLAGS}"
249 export CXXFLAGS="${NEW_CXXFLAGS}"
250} 419}
251 420
421# @FUNCTION: get-flag
422# @USAGE: <flag>
423# @DESCRIPTION:
424# Find and echo the value for a particular flag. Accepts shell globs.
252get-flag() { 425get-flag() {
426 local f findflag="$1"
427
253 # this code looks a little flaky but seems to work for 428 # this code looks a little flaky but seems to work for
254 # everything we want ... 429 # everything we want ...
255 # for example, if CFLAGS="-march=i686": 430 # for example, if CFLAGS="-march=i686":
256 # `get-flags -march` == "-march=i686" 431 # `get-flag -march` == "-march=i686"
257 # `get-flags march` == "i686" 432 # `get-flag march` == "i686"
258 local findflag="$1"
259 for f in ${CFLAGS} ${CXXFLAGS} ; do 433 for f in ${CFLAGS} ${CXXFLAGS} ; do
260 if [ "${f/${findflag}}" != "${f}" ] ; then 434 if [ "${f/${findflag}}" != "${f}" ] ; then
261 echo "${f/-${findflag}=}" 435 printf "%s\n" "${f/-${findflag}=}"
262 return 0 436 return 0
263 fi 437 fi
264 done 438 done
265 return 1 439 return 1
266} 440}
267 441
442# @FUNCTION: has_hardened
443# @DESCRIPTION:
444# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
445has_hardened() {
446 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
447
448 test_version_info Hardened && return 0
449 # The specs file wont exist unless gcc has GCC_SPECS support
450 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
451}
452
453# @FUNCTION: has_pic
454# @DESCRIPTION:
455# DEPRECATED - use gcc-specs-pie from toolchain-funcs
456# indicate whether PIC is set
457has_pic() {
458 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
459
460 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
461 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
462 gcc-specs-pie
463}
464
465# @FUNCTION: has_pie
466# @DESCRIPTION:
467# DEPRECATED - use gcc-specs-pie from toolchain-funcs
468# indicate whether PIE is set
469has_pie() {
470 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
471
472 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
473 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
474 gcc-specs-pie
475}
476
477# @FUNCTION: has_ssp_all
478# @DESCRIPTION:
479# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
480# indicate whether code for SSP is being generated for all functions
481has_ssp_all() {
482 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
483
484 # note; this matches only -fstack-protector-all
485 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
486 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
487 gcc-specs-ssp-all
488}
489
490# @FUNCTION: has_ssp
491# @DESCRIPTION:
492# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
493# indicate whether code for SSP is being generated
494has_ssp() {
495 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
496
497 # note; this matches both -fstack-protector and -fstack-protector-all
498 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
499 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
500 gcc-specs-ssp
501}
502
503# @FUNCTION: has_m64
504# @DESCRIPTION:
505# This doesn't test if the flag is accepted, it tests if the flag actually
506# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
507# return code is 0, else the return code is 1.
508has_m64() {
509 # this doesnt test if the flag is accepted, it tests if the flag
510 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
511 # please dont replace this function with test_flag in some future
512 # clean-up!
513
514 local temp="$(emktemp)"
515 echo "int main() { return(0); }" > "${temp}".c
516 MY_CC=$(tc-getCC)
517 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
518 local ret=$?
519 rm -f "${temp}".c
520 [[ ${ret} != 1 ]] && return 0
521 return 1
522}
523
524# @FUNCTION: has_m32
525# @DESCRIPTION:
526# This doesn't test if the flag is accepted, it tests if the flag actually
527# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
528# code is 0, else return code is 1.
529has_m32() {
530 # this doesnt test if the flag is accepted, it tests if the flag
531 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
532 # please dont replace this function with test_flag in some future
533 # clean-up!
534
535 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
536
537 local temp=$(emktemp)
538 echo "int main() { return(0); }" > "${temp}".c
539 MY_CC=$(tc-getCC)
540 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
541 local ret=$?
542 rm -f "${temp}".c
543 [[ ${ret} != 1 ]] && return 0
544 return 1
545}
546
547# @FUNCTION: replace-sparc64-flags
548# @DESCRIPTION:
549# Sets mcpu to v8 and uses the original value as mtune if none specified.
268replace-sparc64-flags() { 550replace-sparc64-flags() {
269 local SPARC64_CPUS="ultrasparc v9" 551 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
270 552
271 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 553 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
272 then
273 for x in ${SPARC64_CPUS} 554 for x in ${SPARC64_CPUS}; do
274 do
275 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 555 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
276 done 556 done
277 else 557 else
278 for x in ${SPARC64_CPUS} 558 for x in ${SPARC64_CPUS}; do
279 do
280 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 559 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
281 done 560 done
282 fi 561 fi
283 562
284 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 563 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
285 then
286 for x in ${SPARC64_CPUS} 564 for x in ${SPARC64_CPUS}; do
287 do
288 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 565 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
289 done 566 done
290 else 567 else
291 for x in ${SPARC64_CPUS} 568 for x in ${SPARC64_CPUS}; do
292 do
293 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 569 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
294 done 570 done
295 fi 571 fi
296}
297 572
573 export CFLAGS CXXFLAGS
574}
575
576# @FUNCTION: append-ldflags
577# @USAGE: <flags>
578# @DESCRIPTION:
579# Add extra <flags> to the current LDFLAGS.
298append-ldflags() { 580append-ldflags() {
581 [[ -z $* ]] && return 0
582 local flag
583 for flag in "$@"; do
584 [[ ${flag} == -l* ]] && \
585 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
586 done
587
299 LDFLAGS="${LDFLAGS} $@" 588 export LDFLAGS="${LDFLAGS} $*"
300 return 0 589 return 0
301} 590}
302 591
592# @FUNCTION: filter-ldflags
593# @USAGE: <flags>
594# @DESCRIPTION:
595# Remove particular <flags> from LDFLAGS. Accepts shell globs.
303filter-ldflags() { 596filter-ldflags() {
304 # we do this fancy spacing stuff so as to not filter 597 _filter-var LDFLAGS "$@"
305 # out part of a flag ... we want flag atoms ! :D 598 return 0
306 LDFLAGS=" ${LDFLAGS} " 599}
600
601# @FUNCTION: raw-ldflags
602# @USAGE: <flags>
603# @DESCRIPTION:
604# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
605# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
606# to gcc where it needs the '-Wl,'.
607raw-ldflags() {
608 local x input="$@"
609 [[ -z ${input} ]] && input=${LDFLAGS}
610 set --
307 for x in "$@" ; do 611 for x in ${input} ; do
308 LDFLAGS="${LDFLAGS// ${x} / }" 612 x=${x#-Wl,}
613 set -- "$@" ${x//,/ }
309 done 614 done
310 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 615 echo "$@"
311 return 0
312} 616}
313 617
314etexec-flags() { 618# @FUNCTION: bindnow-flags
315 has_version sys-devel/hardened-gcc 619# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
316 if [ $? == 0 ] ; then 620# @DESCRIPTION:
317 if [ "`is-flag -yet_exec`" != "true" ]; then 621# DEPRECATED - Gets the flags needed for "NOW" binding
318 debug-print ">>> appending flags -yet_exec" 622bindnow-flags() {
319 append-flags -yet_exec 623 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" >&2
320 append-ldflags -yet_exec
321 fi
322 fi
323}
324 624
325fstack-flags() { 625 case $($(tc-getLD) -v 2>&1 </dev/null) in
326 has_version sys-devel/hardened-gcc 626 *GNU* | *'with BFD'*) # GNU ld
327 if [ $? == 0 ] ; then 627 echo "-Wl,-z,now" ;;
328 if [ "`is-flag -yno_propolice`" != "true" ]; then 628 *Apple*) # Darwin ld
329 debug-print ">>> appending flags -yno_propolice" 629 echo "-bind_at_load" ;;
330 append-flags -yno_propolice 630 *)
331 append-ldflags -yno_propolice 631 # Some linkers just recognize -V instead of -v
332 fi 632 case $($(tc-getLD) -V 2>&1 </dev/null) in
333 fi 633 *Solaris*) # Solaris accept almost the same GNU options
634 echo "-Wl,-z,now" ;;
635 esac
636 ;;
637 esac
334} 638}
639
640
641# Some tests for when we screw with things and want to make
642# sure we didn't break anything
643#TESTS() {
644# CFLAGS="-a -b -c=1"
645# CXXFLAGS="-x -y -z=2"
646# LDFLAGS="-l -m -n=3"
647#
648# die() { exit 1; }
649# (is-flag 1 2 3) && die
650# (is-ldflag 1 2 3) && die
651#
652# is-flagq -l && die
653# is-ldflagq -a && die
654# is-flagq -a || die
655# is-flagq -x || die
656# is-ldflagq -n=* || die
657# is-ldflagq -n && die
658#
659# strip-unsupported-flags
660# [[ ${CFLAGS} == "-c=1" ]] || die
661# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
662#
663# echo "All tests pass"
664#}
665#TESTS

Legend:
Removed from v.1.41  
changed lines
  Added in v.1.123

  ViewVC Help
Powered by ViewVC 1.1.20