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1# Copyright 1999-2004 Gentoo Foundation 1# Copyright 1999-2009 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 1.62 2004/07/15 04:59:44 lv Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.129 2009/01/04 17:22:16 vapier 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 $ECLASS"
9IUSE="$IUSE debug"
10 28
11#
12#### filter-flags <flags> ####
13# Remove particular flags from C[XX]FLAGS
14# Matches only complete flags
15#
16#### append-flags <flags> ####
17# Add extra flags to your current C[XX]FLAGS
18#
19#### replace-flags <orig.flag> <new.flag> ###
20# Replace a flag by another one
21#
22#### replace-cpu-flags <new.cpu> <old.cpus> ###
23# Replace march/mcpu flags that specify <old.cpus>
24# with flags that specify <new.cpu>
25#
26#### is-flag <flag> ####
27# Returns "true" if flag is set in C[XX]FLAGS
28# Matches only complete a flag
29#
30#### strip-flags ####
31# Strip C[XX]FLAGS of everything except known
32# good options.
33#
34#### strip-unsupported-flags ####
35# Strip C[XX]FLAGS of any flags not supported by
36# installed version of gcc
37#
38#### get-flag <flag> ####
39# Find and echo the value for a particular flag
40#
41#### replace-sparc64-flags ####
42# Sets mcpu to v8 and uses the original value
43# as mtune if none specified.
44#
45#### filter-mfpmath <math types> ####
46# Remove specified math types from the fpmath specification
47# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
48# will leave the user with -mfpmath=386
49#
50#### append-ldflags ####
51# Add extra flags to your current LDFLAGS
52#
53#### filter-ldflags <flags> ####
54# Remove particular flags from LDFLAGS
55# Matches only complete flags
56#
57#### etexec-flags ####
58# hooked function for hardened gcc that appends
59# -fno-pic to {C,CXX,LD}FLAGS
60# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
61#
62#### fstack-flags ####
63# hooked function for hardened gcc that appends
64# -fno-stack-protector to {C,CXX,LD}FLAGS
65# when a package is filtering -fstack-protector, -fstack-protector-all
66# notice: modern automatic specs files will also suppress -fstack-protector-all
67# when only -fno-stack-protector is given
68#
69
70# C[XX]FLAGS that we allow in strip-flags 29# {C,CXX,F,FC}FLAGS that we allow in strip-flags
30# Note: shell globs and character lists are allowed
71setup-allowed-flags() { 31setup-allowed-flags() {
72 if [ -z "${ALLOWED_FLAGS}" ] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 33 export ALLOWED_FLAGS="-pipe"
34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
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="${ALLOWED_FLAGS} -fno-ident"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
41 fi
42 # allow a bunch of flags that negate features / control ABI
43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow"
45 ALLOWED_FLAGS="${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 -m*-toc -D* -U*"
55
56 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
57 # NOTE: currently -Os have issues with gcc3 and K6* arch's
58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
59 return 0
60}
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 "$@" ; do
74 case "${ARCH}" in 67 case "${f}" in
75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 68 # Ideally we should only concern ourselves with PIE flags,
76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 69 # not -fPIC or -fpic, but too many places filter -fPIC without
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 70 # thinking about -fPIE.
78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 71 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
79 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 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 -fno-strict-overflow)
81 gcc-specs-nostrict || continue
82 is-flagq -fstrict-overflow || append-flags -fstrict-overflow;;
80 esac 83 esac
81 fi 84 done
82
83 # C[XX]FLAGS that we are think is ok, but needs testing
84 # NOTE: currently -Os have issues with gcc3 and K6* arch's
85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
86 return 0
87} 85}
88 86
87# Remove occurrences of strings from variable given in $1
88# Strings removed are matched as globs, so for example
89# '-O*' would remove -O1, -O2 etc.
90_filter-var() {
91 local f x VAR VAL
92 declare -a new
93
94 VAR=$1
95 shift
96 eval VAL=\${${VAR}}
97 for f in ${VAL}; do
98 for x in "$@"; do
99 # Note this should work with globs like -O*
100 [[ ${f} == ${x} ]] && continue 2
101 done
102 eval new\[\${\#new\[@]}]=\${f}
103 done
104 eval export ${VAR}=\${new\[*]}
105}
106
107# @FUNCTION: filter-flags
108# @USAGE: <flags>
109# @DESCRIPTION:
110# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
89filter-flags() { 111filter-flags() {
90 local x f fset 112 _filter-hardened "$@"
91 declare -a new_CFLAGS new_CXXFLAGS 113 _filter-var CFLAGS "$@"
92 114 _filter-var CPPFLAGS "$@"
93 for x in "$@" ; do 115 _filter-var CXXFLAGS "$@"
94 case "${x}" in 116 _filter-var FFLAGS "$@"
95 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 117 _filter-var FCFLAGS "$@"
96 -fstack-protector|-fstack-protector-all) fstack-flags;;
97 esac
98 done
99
100 for fset in CFLAGS CXXFLAGS; do
101 for f in ${!fset}; do
102 for x in "$@"; do
103 # Note this should work with globs like -O*
104 [[ ${f} == ${x} ]] && continue 2
105 done
106 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
107 done
108 eval export ${fset}=\${new_${fset}\[*]}
109 done
110
111 return 0 118 return 0
112} 119}
113 120
121# @FUNCTION: filter-lfs-flags
122# @DESCRIPTION:
123# Remove flags that enable Large File Support.
114filter-lfs-flags() { 124filter-lfs-flags() {
125 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
115 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 126 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
116} 127}
117 128
129# @FUNCTION: append-cppflags
130# @USAGE: <flags>
131# @DESCRIPTION:
132# Add extra <flags> to the current CPPFLAGS.
133append-cppflags() {
134 [[ -z $* ]] && return 0
135 export CPPFLAGS="${CPPFLAGS} $*"
136 return 0
137}
138
139# @FUNCTION: append-fflags
140# @USAGE: <flags>
141# @DESCRIPTION:
142# Add extra <flags> to the current {F,FC}FLAGS.
143append-fflags() {
144 [[ -z $* ]] && return 0
145 export FFLAGS="${FFLAGS} $*"
146 export FCFLAGS="${FCFLAGS} $*"
147 return 0
148}
149
150# @FUNCTION: append-lfs-flags
151# @DESCRIPTION:
152# Add flags that enable Large File Support.
118append-lfs-flags() { 153append-lfs-flags() {
154 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
119 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 155 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
120} 156}
121 157
158# @FUNCTION: append-flags
159# @USAGE: <flags>
160# @DESCRIPTION:
161# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
122append-flags() { 162append-flags() {
163 [[ -z $* ]] && return 0
123 export CFLAGS="${CFLAGS} $*" 164 export CFLAGS="${CFLAGS} $*"
124 export CXXFLAGS="${CXXFLAGS} $*" 165 export CXXFLAGS="${CXXFLAGS} $*"
125 [ -n "`is-flag -fno-stack-protector`" -o \ 166 export FFLAGS="${FFLAGS} $*"
126 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 167 export FCFLAGS="${FCFLAGS} $*"
127 return 0 168 return 0
128} 169}
129 170
171# @FUNCTION: replace-flags
172# @USAGE: <old> <new>
173# @DESCRIPTION:
174# Replace the <old> flag with <new>. Accepts shell globs for <old>.
130replace-flags() { 175replace-flags() {
131 # we do this fancy spacing stuff so as to not filter 176 [[ $# != 2 ]] \
132 # out part of a flag ... we want flag atoms ! :D 177 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
133 CFLAGS=" ${CFLAGS} " 178 && die "replace-flags takes 2 arguments, not $#"
134 CXXFLAGS=" ${CXXFLAGS} "
135 CFLAGS="${CFLAGS// ${1} / ${2} }"
136 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
137 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
138 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
139 export CFLAGS CXXFLAGS
140 return 0
141}
142 179
180 local f fset
181 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
182
183 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
184 # Looping over the flags instead of using a global
185 # substitution ensures that we're working with flag atoms.
186 # Otherwise globs like -O* have the potential to wipe out the
187 # list of flags.
188 for f in ${!fset}; do
189 # Note this should work with globs like -O*
190 [[ ${f} == ${1} ]] && f=${2}
191 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
192 done
193 eval export ${fset}=\${new_${fset}\[*]}
194 done
195
196 return 0
197}
198
199# @FUNCTION: replace-cpu-flags
200# @USAGE: <old> <new>
201# @DESCRIPTION:
202# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
203# with flags that select the <new> cpu. Accepts shell globs for <old>.
143replace-cpu-flags() { 204replace-cpu-flags() {
144 local oldcpu newcpu="$1" ; shift 205 local newcpu="$#" ; newcpu="${!newcpu}"
145 for oldcpu in "$@" ; do 206 while [ $# -gt 1 ] ; do
207 # quote to make sure that no globbing is done (particularly on
208 # ${oldcpu}) prior to calling replace-flags
146 replace-flags -march=${oldcpu} -march=${newcpu} 209 replace-flags "-march=${1}" "-march=${newcpu}"
147 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 210 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
148 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 211 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
212 shift
149 done 213 done
214 return 0
215}
216
217_is_flagq() {
218 local x
219 for x in ${!1} ; do
220 [[ ${x} == $2 ]] && return 0
221 done
150 return 0 222 return 1
151} 223}
152 224
225# @FUNCTION: is-flagq
226# @USAGE: <flag>
227# @DESCRIPTION:
228# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
229is-flagq() {
230 [[ -n $2 ]] && die "Usage: is-flag <flag>"
231 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
232}
233
234# @FUNCTION: is-flag
235# @USAGE: <flag>
236# @DESCRIPTION:
237# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
153is-flag() { 238is-flag() {
154 local x 239 is-flagq "$@" && echo true
155
156 for x in ${CFLAGS} ${CXXFLAGS} ; do
157 if [ "${x}" == "$1" ] ; then
158 echo true
159 return 0
160 fi
161 done
162 return 1
163} 240}
164 241
242# @FUNCTION: is-ldflagq
243# @USAGE: <flag>
244# @DESCRIPTION:
245# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
246is-ldflagq() {
247 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
248 _is_flagq LDFLAGS $1
249}
250
251# @FUNCTION: is-ldflag
252# @USAGE: <flag>
253# @DESCRIPTION:
254# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
255is-ldflag() {
256 is-ldflagq "$@" && echo true
257}
258
259# @FUNCTION: filter-mfpmath
260# @USAGE: <math types>
261# @DESCRIPTION:
262# Remove specified math types from the fpmath flag. For example, if the user
263# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
264# -mfpmath=386.
165filter-mfpmath() { 265filter-mfpmath() {
166 local orig_mfpmath new_math prune_math 266 local orig_mfpmath new_math prune_math
167 267
168 # save the original -mfpmath flag 268 # save the original -mfpmath flag
169 orig_mfpmath="`get-flag -mfpmath`" 269 orig_mfpmath=$(get-flag -mfpmath)
170 # get the value of the current -mfpmath flag 270 # get the value of the current -mfpmath flag
171 new_math=" `get-flag mfpmath | tr , ' '` " 271 new_math=$(get-flag mfpmath)
272 new_math=" ${new_math//,/ } "
172 # figure out which math values are to be removed 273 # figure out which math values are to be removed
173 prune_math="" 274 prune_math=""
174 for prune_math in "$@" ; do 275 for prune_math in "$@" ; do
175 new_math="${new_math/ ${prune_math} / }" 276 new_math=${new_math/ ${prune_math} / }
176 done 277 done
177 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 278 new_math=$(echo ${new_math})
279 new_math=${new_math// /,}
178 280
179 if [ -z "${new_math}" ] ; then 281 if [[ -z ${new_math} ]] ; then
180 # if we're removing all user specified math values are 282 # if we're removing all user specified math values are
181 # slated for removal, then we just filter the flag 283 # slated for removal, then we just filter the flag
182 filter-flags ${orig_mfpmath} 284 filter-flags ${orig_mfpmath}
183 else 285 else
184 # if we only want to filter some of the user specified 286 # if we only want to filter some of the user specified
186 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 288 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
187 fi 289 fi
188 return 0 290 return 0
189} 291}
190 292
293# @FUNCTION: strip-flags
294# @DESCRIPTION:
295# Strip C[XX]FLAGS of everything except known good/safe flags.
191strip-flags() { 296strip-flags() {
192 local x y flag NEW_CFLAGS NEW_CXXFLAGS 297 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
193 298
194 setup-allowed-flags 299 setup-allowed-flags
195 300
196 local NEW_CFLAGS="" 301 local NEW_CFLAGS=""
197 local NEW_CXXFLAGS="" 302 local NEW_CXXFLAGS=""
303 local NEW_FFLAGS=""
304 local NEW_FCFLAGS=""
198 305
199 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 306 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
200 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 307 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
201 use debug && einfo "Enabling the use of some unstable flags"
202 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 308 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
203 fi 309 fi
204 310
205 set -f # disable pathname expansion 311 set -f # disable pathname expansion
206 312
207 for x in ${CFLAGS}; do 313 for x in ${CFLAGS}; do
208 for y in ${ALLOWED_FLAGS}; do 314 for y in ${ALLOWED_FLAGS}; do
209 flag=${x%%=*} 315 flag=${x%%=*}
210 if [ "${flag%%${y}}" = "" ]; then 316 if [ "${flag%%${y}}" = "" ] ; then
211 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 317 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
212 break 318 break
213 fi 319 fi
214 done 320 done
215 done 321 done
216 322
217 for x in ${CXXFLAGS}; do 323 for x in ${CXXFLAGS}; do
218 for y in ${ALLOWED_FLAGS}; do 324 for y in ${ALLOWED_FLAGS}; do
219 flag=${x%%=*} 325 flag=${x%%=*}
220 if [ "${flag%%${y}}" = "" ]; then 326 if [ "${flag%%${y}}" = "" ] ; then
221 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 327 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
222 break 328 break
223 fi 329 fi
224 done 330 done
225 done 331 done
226 332
333 for x in ${FFLAGS}; do
334 for y in ${ALLOWED_FLAGS}; do
335 flag=${x%%=*}
336 if [ "${flag%%${y}}" = "" ] ; then
337 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
338 break
339 fi
340 done
341 done
342
343 for x in ${FCFLAGS}; do
344 for y in ${ALLOWED_FLAGS}; do
345 flag=${x%%=*}
346 if [ "${flag%%${y}}" = "" ] ; then
347 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
348 break
349 fi
350 done
351 done
352
227 # In case we filtered out all optimization flags fallback to -O2 353 # In case we filtered out all optimization flags fallback to -O2
228 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 354 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
229 NEW_CFLAGS="${NEW_CFLAGS} -O2" 355 NEW_CFLAGS="${NEW_CFLAGS} -O2"
230 fi 356 fi
231 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 357 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
232 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 358 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
233 fi 359 fi
360 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
361 NEW_FFLAGS="${NEW_FFLAGS} -O2"
362 fi
363 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
364 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
365 fi
234 366
235 set +f # re-enable pathname expansion 367 set +f # re-enable pathname expansion
236 368
237 export CFLAGS="${NEW_CFLAGS}" 369 export CFLAGS="${NEW_CFLAGS}"
238 export CXXFLAGS="${NEW_CXXFLAGS}" 370 export CXXFLAGS="${NEW_CXXFLAGS}"
371 export FFLAGS="${NEW_FFLAGS}"
372 export FCFLAGS="${NEW_FCFLAGS}"
373 return 0
374}
375
376test-flag-PROG() {
377 local comp=$1
378 local flags="$2"
379
380 [[ -z ${comp} || -z ${flags} ]] && \
239 return 0 381 return 1
240}
241 382
383 local PROG=$(tc-get${comp})
384 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
385 > /dev/null 2>&1
386}
387
388# @FUNCTION: test-flag-CC
389# @USAGE: <flag>
390# @DESCRIPTION:
391# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
392test-flag-CC() { test-flag-PROG "CC" "$1"; }
393
394# @FUNCTION: test-flag-CXX
395# @USAGE: <flag>
396# @DESCRIPTION:
397# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
398test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
399
400# @FUNCTION: test-flag-F77
401# @USAGE: <flag>
402# @DESCRIPTION:
403# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
404test-flag-F77() { test-flag-PROG "F77" "$1"; }
405
406# @FUNCTION: test-flag-FC
407# @USAGE: <flag>
408# @DESCRIPTION:
409# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
410test-flag-FC() { test-flag-PROG "FC" "$1"; }
411
412test-flags-PROG() {
413 local comp=$1
414 local flags
415 local x
416
417 shift
418
419 [[ -z ${comp} ]] && return 1
420
421 x=""
422 for x in "$@" ; do
423 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
424 done
425
426 echo "${flags}"
427
428 # Just bail if we dont have any flags
429 [[ -n ${flags} ]]
430}
431
432# @FUNCTION: test-flags-CC
433# @USAGE: <flags>
434# @DESCRIPTION:
435# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
436test-flags-CC() { test-flags-PROG "CC" "$@"; }
437
438# @FUNCTION: test-flags-CXX
439# @USAGE: <flags>
440# @DESCRIPTION:
441# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
442test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
443
444# @FUNCTION: test-flags-F77
445# @USAGE: <flags>
446# @DESCRIPTION:
447# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
448test-flags-F77() { test-flags-PROG "F77" "$@"; }
449
450# @FUNCTION: test-flags-FC
451# @USAGE: <flags>
452# @DESCRIPTION:
453# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
454test-flags-FC() { test-flags-PROG "FC" "$@"; }
455
456# @FUNCTION: test-flags
457# @USAGE: <flags>
458# @DESCRIPTION:
459# Short-hand that should hopefully work for both C and C++ compiler, but
460# its really only present due to the append-flags() abomination.
461test-flags() { test-flags-CC "$@"; }
462
463# @FUNCTION: test_flag
464# @DESCRIPTION:
465# DEPRICIATED, use test-flags()
242test_flag() { 466test_flag() {
243 local cc=${CC:-gcc} ; cc=${cc%% *} 467 ewarn "test_flag: deprecated, please use test-flags()!" >&2
244 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
245 printf "%s\n" "$*"
246 return 0
247 fi
248 return 1
249}
250 468
469 test-flags-CC "$@"
470}
471
472# @FUNCTION: test_version_info
473# @USAGE: <version>
474# @DESCRIPTION:
475# Returns shell true if the current C compiler version matches <version>, else returns shell false.
476# Accepts shell globs.
251test_version_info() { 477test_version_info() {
252 local cc=${CC:-gcc} ; cc=${cc%% *}
253 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 478 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
254 return 0 479 return 0
255 else 480 else
256 return 1 481 return 1
257 fi 482 fi
258} 483}
259 484
485# @FUNCTION: strip-unsupported-flags
486# @DESCRIPTION:
487# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
260strip-unsupported-flags() { 488strip-unsupported-flags() {
261 local NEW_CFLAGS NEW_CXXFLAGS 489 export CFLAGS=$(test-flags-CC ${CFLAGS})
262 490 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
263 for x in ${CFLAGS} ; do 491 export FFLAGS=$(test-flags-F77 ${FFLAGS})
264 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 492 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
265 done
266 for x in ${CXXFLAGS} ; do
267 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
268 done
269
270 export CFLAGS="${NEW_CFLAGS}"
271 export CXXFLAGS="${NEW_CXXFLAGS}"
272} 493}
273 494
495# @FUNCTION: get-flag
496# @USAGE: <flag>
497# @DESCRIPTION:
498# Find and echo the value for a particular flag. Accepts shell globs.
274get-flag() { 499get-flag() {
275 local f findflag="$1" 500 local f findflag="$1"
276 501
277 # this code looks a little flaky but seems to work for 502 # this code looks a little flaky but seems to work for
278 # everything we want ... 503 # everything we want ...
279 # for example, if CFLAGS="-march=i686": 504 # for example, if CFLAGS="-march=i686":
280 # `get-flag -march` == "-march=i686" 505 # `get-flag -march` == "-march=i686"
281 # `get-flag march` == "i686" 506 # `get-flag march` == "i686"
282 for f in ${CFLAGS} ${CXXFLAGS} ; do 507 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
283 if [ "${f/${findflag}}" != "${f}" ] ; then 508 if [ "${f/${findflag}}" != "${f}" ] ; then
284 printf "%s\n" "${f/-${findflag}=}" 509 printf "%s\n" "${f/-${findflag}=}"
285 return 0 510 return 0
286 fi 511 fi
287 done 512 done
288 return 1 513 return 1
289} 514}
290 515
516# @FUNCTION: has_hardened
517# @DESCRIPTION:
518# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
291has_hardened() { 519has_hardened() {
520 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
521
292 test_version_info Hardened 522 test_version_info Hardened && return 0
293 return $? 523 # The specs file wont exist unless gcc has GCC_SPECS support
524 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
294} 525}
295 526
527# @FUNCTION: has_pic
528# @DESCRIPTION:
529# DEPRECATED - use gcc-specs-pie from toolchain-funcs
530# indicate whether PIC is set
296has_pic() { 531has_pic() {
297 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 532 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
298 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
299 test_version_info pie && return 0
300 return 1
301}
302 533
534 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
535 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
536 gcc-specs-pie
537}
538
539# @FUNCTION: has_pie
540# @DESCRIPTION:
541# DEPRECATED - use gcc-specs-pie from toolchain-funcs
542# indicate whether PIE is set
303has_pie() { 543has_pie() {
304 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 544 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
305 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 545
306 test_version_info pie && return 0 546 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
307 return 1 547 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
548 gcc-specs-pie
308} 549}
309 550
551# @FUNCTION: has_ssp_all
552# @DESCRIPTION:
553# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
554# indicate whether code for SSP is being generated for all functions
555has_ssp_all() {
556 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
557
558 # note; this matches only -fstack-protector-all
559 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
560 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
561 gcc-specs-ssp-all
562}
563
564# @FUNCTION: has_ssp
565# @DESCRIPTION:
566# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
567# indicate whether code for SSP is being generated
310has_ssp() { 568has_ssp() {
569 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
570
571 # note; this matches both -fstack-protector and -fstack-protector-all
311 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 572 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
312 test_version_info ssp && return 0 573 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
313 return 1 574 gcc-specs-ssp
314} 575}
315 576
577# @FUNCTION: has_m64
578# @DESCRIPTION:
579# This doesn't test if the flag is accepted, it tests if the flag actually
580# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
581# return code is 0, else the return code is 1.
316has_m64() { 582has_m64() {
317 # this doesnt test if the flag is accepted, it tests if the flag 583 # this doesnt test if the flag is accepted, it tests if the flag
318 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 584 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
319 # please dont replace this function with test_flag in some future 585 # please dont replace this function with test_flag in some future
320 # clean-up! 586 # clean-up!
321 temp=`mktemp` 587
588 local temp="$(emktemp)"
322 echo "int main() { return(0); }" > ${temp}.c 589 echo "int main() { return(0); }" > "${temp}".c
323 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 590 MY_CC=$(tc-getCC)
324 ret=$? 591 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
592 local ret=$?
325 rm -f ${temp}.c 593 rm -f "${temp}".c
326 [ "$ret" != "1" ] && return 0 594 [[ ${ret} != 1 ]] && return 0
327 return 1 595 return 1
328} 596}
329 597
598# @FUNCTION: has_m32
599# @DESCRIPTION:
600# This doesn't test if the flag is accepted, it tests if the flag actually
601# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
602# code is 0, else return code is 1.
330has_m32() { 603has_m32() {
331 # this doesnt test if the flag is accepted, it tests if the flag 604 # this doesnt test if the flag is accepted, it tests if the flag
332 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 605 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
333 # please dont replace this function with test_flag in some future 606 # please dont replace this function with test_flag in some future
334 # clean-up! 607 # clean-up!
335 temp=`mktemp` 608
609 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
610
611 local temp=$(emktemp)
336 echo "int main() { return(0); }" > ${temp}.c 612 echo "int main() { return(0); }" > "${temp}".c
337 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 613 MY_CC=$(tc-getCC)
338 ret=$? 614 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
615 local ret=$?
339 rm -f ${temp}.c 616 rm -f "${temp}".c
340 [ "$ret" != "1" ] && return 0 617 [[ ${ret} != 1 ]] && return 0
341 return 1 618 return 1
342} 619}
343 620
621# @FUNCTION: replace-sparc64-flags
622# @DESCRIPTION:
623# Sets mcpu to v8 and uses the original value as mtune if none specified.
344replace-sparc64-flags() { 624replace-sparc64-flags() {
345 local SPARC64_CPUS="ultrasparc v9" 625 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
346 626
347 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 627 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
348 for x in ${SPARC64_CPUS}; do 628 for x in ${SPARC64_CPUS}; do
349 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 629 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
350 done 630 done
351 else 631 else
352 for x in ${SPARC64_CPUS}; do 632 for x in ${SPARC64_CPUS}; do
353 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 633 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
354 done 634 done
355 fi 635 fi
356 636
357 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 637 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
358 for x in ${SPARC64_CPUS}; do 638 for x in ${SPARC64_CPUS}; do
359 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 639 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
360 done 640 done
361 else 641 else
362 for x in ${SPARC64_CPUS}; do 642 for x in ${SPARC64_CPUS}; do
363 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 643 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
364 done 644 done
365 fi 645 fi
366 646
367 export CFLAGS CXXFLAGS 647 export CFLAGS CXXFLAGS
368} 648}
369 649
650# @FUNCTION: append-ldflags
651# @USAGE: <flags>
652# @DESCRIPTION:
653# Add extra <flags> to the current LDFLAGS.
370append-ldflags() { 654append-ldflags() {
655 [[ -z $* ]] && return 0
656 local flag
657 for flag in "$@"; do
658 [[ ${flag} == -l* ]] && \
659 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
660 done
661
371 export LDFLAGS="${LDFLAGS} $*" 662 export LDFLAGS="${LDFLAGS} $*"
372 return 0 663 return 0
373} 664}
374 665
666# @FUNCTION: filter-ldflags
667# @USAGE: <flags>
668# @DESCRIPTION:
669# Remove particular <flags> from LDFLAGS. Accepts shell globs.
375filter-ldflags() { 670filter-ldflags() {
376 local x 671 _filter-var LDFLAGS "$@"
672 return 0
673}
377 674
378 # we do this fancy spacing stuff so as to not filter 675# @FUNCTION: raw-ldflags
379 # out part of a flag ... we want flag atoms ! :D 676# @USAGE: <flags>
380 LDFLAGS=" ${LDFLAGS} " 677# @DESCRIPTION:
678# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
679# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
680# to gcc where it needs the '-Wl,'.
681raw-ldflags() {
682 local x input="$@"
683 [[ -z ${input} ]] && input=${LDFLAGS}
684 set --
381 for x in "$@" ; do 685 for x in ${input} ; do
382 LDFLAGS="${LDFLAGS// ${x} / }" 686 x=${x#-Wl,}
687 set -- "$@" ${x//,/ }
383 done 688 done
384 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 689 echo "$@"
385 export LDFLAGS
386 return 0
387} 690}
388 691
389etexec-flags() { 692# @FUNCTION: bindnow-flags
390 # if you're not using a hardened compiler you wont need this 693# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
391 # PIC/no-pic kludge in the first place. 694# @DESCRIPTION:
392 has_hardened || return 0 695# DEPRECATED - Gets the flags needed for "NOW" binding
393 696bindnow-flags() {
394 if has_pie || has_pic; then 697 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild"
395 [ -z "`is-flag -fno-pic`" ] &&
396 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
397 [ -z "`is-flag -nopie`" ] &&
398 export CFLAGS="${CFLAGS} `test_flag -nopie`"
399 fi
400 return 0
401} 698}
402 699
403fstack-flags() { 700
404 if has_ssp; then 701# Some tests for when we screw with things and want to make
405 [ -z "`is-flag -fno-stack-protector`" ] && 702# sure we didn't break anything
406 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 703#TESTS() {
407 fi 704# CFLAGS="-a -b -c=1"
408 return 0 705# CXXFLAGS="-x -y -z=2"
409} 706# LDFLAGS="-l -m -n=3"
707#
708# die() { exit 1; }
709# (is-flag 1 2 3) && die
710# (is-ldflag 1 2 3) && die
711#
712# is-flagq -l && die
713# is-ldflagq -a && die
714# is-flagq -a || die
715# is-flagq -x || die
716# is-ldflagq -n=* || die
717# is-ldflagq -n && die
718#
719# strip-unsupported-flags
720# [[ ${CFLAGS} == "-c=1" ]] || die
721# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
722#
723# echo "All tests pass"
724#}
725#TESTS

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