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1# Copyright 1999-2003 Gentoo Technologies, Inc. 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 1.50 2004/05/12 13:36:17 pappy Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.132 2009/01/21 00:42:20 gengor 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 28
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# -fno-pic to {C,CXX,LD}FLAGS
59# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
60#
61#### fstack-flags ####
62# hooked function for hardened gcc that appends
63# -fno-stack-protector to {C,CXX,LD}FLAGS
64# when a package is filtering -fstack-protector, -fstack-protector-all
65# notice: modern automatic specs files will also suppress -fstack-protector-all
66# when only -fno-stack-protector is given
67#
68
69# 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
70setup-allowed-flags() { 31setup-allowed-flags() {
71 if [ -z "${ALLOWED_FLAGS}" ] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
72 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 33 export ALLOWED_FLAGS="-pipe"
34 export ALLOWED_FLAGS="${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 "$@" ; do
73 case "${ARCH}" in 67 case "${f}" in
74 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 68 # Ideally we should only concern ourselves with PIE flags,
75 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 69 # not -fPIC or -fpic, but too many places filter -fPIC without
76 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 70 # thinking about -fPIE.
77 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 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 $(test-flags -fno-stack-protector);;
77 -fstack-protector-all)
78 gcc-specs-ssp-to-all || continue
79 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
80 -fno-strict-overflow)
81 gcc-specs-nostrict || continue
82 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
78 esac 83 esac
79 fi 84 done
80
81 # C[XX]FLAGS that we are think is ok, but needs testing
82 # NOTE: currently -Os have issues with gcc3 and K6* arch's
83 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
84 return 0
85} 85}
86 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.
87filter-flags() { 111filter-flags() {
88 for x in "$@" ; do 112 _filter-hardened "$@"
89 case "${x}" in 113 _filter-var CFLAGS "$@"
90 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 114 _filter-var CPPFLAGS "$@"
91 -fstack-protector|-fstack-protector-all) fstack-flags;; 115 _filter-var CXXFLAGS "$@"
92 *) ;; 116 _filter-var FFLAGS "$@"
93 esac 117 _filter-var FCFLAGS "$@"
94 done
95
96 # we do this fancy spacing stuff so as to not filter
97 # out part of a flag ... we want flag atoms ! :D
98 CFLAGS=" ${CFLAGS} "
99 CXXFLAGS=" ${CXXFLAGS} "
100 for x in "$@" ; do
101 CFLAGS="${CFLAGS// ${x} / }"
102 CXXFLAGS="${CXXFLAGS// ${x} / }"
103 done
104 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
105 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
106 return 0 118 return 0
107} 119}
108 120
121# @FUNCTION: filter-lfs-flags
122# @DESCRIPTION:
123# Remove flags that enable Large File Support.
109filter-lfs-flags() { 124filter-lfs-flags() {
125 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
110 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
111} 127}
112 128
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-cxxflags
140# @USAGE: <flags>
141# @DESCRIPTION:
142# Add extra <flags> to the current CXXFLAGS.
143append-cxxflags() {
144 [[ -z $* ]] && return 0
145 export CXXFLAGS="${CXXFLAGS} $*"
146 return 0
147}
148
149# @FUNCTION: append-fflags
150# @USAGE: <flags>
151# @DESCRIPTION:
152# Add extra <flags> to the current {F,FC}FLAGS.
153append-fflags() {
154 [[ -z $* ]] && return 0
155 export FFLAGS="${FFLAGS} $*"
156 export FCFLAGS="${FCFLAGS} $*"
157 return 0
158}
159
160# @FUNCTION: append-lfs-flags
161# @DESCRIPTION:
162# Add flags that enable Large File Support.
113append-lfs-flags() { 163append-lfs-flags() {
164 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
114 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 165 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
115} 166}
116 167
168# @FUNCTION: append-flags
169# @USAGE: <flags>
170# @DESCRIPTION:
171# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
117append-flags() { 172append-flags() {
173 [[ -z $* ]] && return 0
118 export CFLAGS="${CFLAGS} $@" 174 export CFLAGS="${CFLAGS} $*"
119 export CXXFLAGS="${CXXFLAGS} $@" 175 export CXXFLAGS="${CXXFLAGS} $*"
120 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags 176 export FFLAGS="${FFLAGS} $*"
177 export FCFLAGS="${FCFLAGS} $*"
121 return 0 178 return 0
122} 179}
123 180
181# @FUNCTION: replace-flags
182# @USAGE: <old> <new>
183# @DESCRIPTION:
184# Replace the <old> flag with <new>. Accepts shell globs for <old>.
124replace-flags() { 185replace-flags() {
125 # we do this fancy spacing stuff so as to not filter 186 [[ $# != 2 ]] \
126 # out part of a flag ... we want flag atoms ! :D 187 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
127 CFLAGS=" ${CFLAGS} " 188 && die "replace-flags takes 2 arguments, not $#"
128 CXXFLAGS=" ${CXXFLAGS} "
129 CFLAGS="${CFLAGS// ${1} / ${2} }"
130 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
131 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
132 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
133 return 0
134}
135 189
190 local f fset
191 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
192
193 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
194 # Looping over the flags instead of using a global
195 # substitution ensures that we're working with flag atoms.
196 # Otherwise globs like -O* have the potential to wipe out the
197 # list of flags.
198 for f in ${!fset}; do
199 # Note this should work with globs like -O*
200 [[ ${f} == ${1} ]] && f=${2}
201 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
202 done
203 eval export ${fset}=\${new_${fset}\[*]}
204 done
205
206 return 0
207}
208
209# @FUNCTION: replace-cpu-flags
210# @USAGE: <old> <new>
211# @DESCRIPTION:
212# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
213# with flags that select the <new> cpu. Accepts shell globs for <old>.
136replace-cpu-flags() { 214replace-cpu-flags() {
137 local newcpu="$1" ; shift 215 local newcpu="$#" ; newcpu="${!newcpu}"
138 local oldcpu="" 216 while [ $# -gt 1 ] ; do
139 for oldcpu in "$@" ; do 217 # quote to make sure that no globbing is done (particularly on
218 # ${oldcpu}) prior to calling replace-flags
140 replace-flags -march=${oldcpu} -march=${newcpu} 219 replace-flags "-march=${1}" "-march=${newcpu}"
141 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 220 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
142 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 221 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
222 shift
143 done 223 done
224 return 0
225}
226
227_is_flagq() {
228 local x
229 for x in ${!1} ; do
230 [[ ${x} == $2 ]] && return 0
231 done
144 return 0 232 return 1
145} 233}
146 234
235# @FUNCTION: is-flagq
236# @USAGE: <flag>
237# @DESCRIPTION:
238# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
239is-flagq() {
240 [[ -n $2 ]] && die "Usage: is-flag <flag>"
241 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
242}
243
244# @FUNCTION: is-flag
245# @USAGE: <flag>
246# @DESCRIPTION:
247# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
147is-flag() { 248is-flag() {
148 for x in ${CFLAGS} ${CXXFLAGS} ; do 249 is-flagq "$@" && echo true
149 if [ "${x}" == "$1" ] ; then
150 echo true
151 return 0
152 fi
153 done
154 return 1
155} 250}
156 251
252# @FUNCTION: is-ldflagq
253# @USAGE: <flag>
254# @DESCRIPTION:
255# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
256is-ldflagq() {
257 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
258 _is_flagq LDFLAGS $1
259}
260
261# @FUNCTION: is-ldflag
262# @USAGE: <flag>
263# @DESCRIPTION:
264# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
265is-ldflag() {
266 is-ldflagq "$@" && echo true
267}
268
269# @FUNCTION: filter-mfpmath
270# @USAGE: <math types>
271# @DESCRIPTION:
272# Remove specified math types from the fpmath flag. For example, if the user
273# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
274# -mfpmath=386.
157filter-mfpmath() { 275filter-mfpmath() {
276 local orig_mfpmath new_math prune_math
277
158 # save the original -mfpmath flag 278 # save the original -mfpmath flag
159 local orig_mfpmath="`get-flag -mfpmath`" 279 orig_mfpmath=$(get-flag -mfpmath)
160 # get the value of the current -mfpmath flag 280 # get the value of the current -mfpmath flag
161 local new_math=" `get-flag mfpmath | tr , ' '` " 281 new_math=$(get-flag mfpmath)
282 new_math=" ${new_math//,/ } "
162 # figure out which math values are to be removed 283 # figure out which math values are to be removed
163 local prune_math="" 284 prune_math=""
164 for prune_math in "$@" ; do 285 for prune_math in "$@" ; do
165 new_math="${new_math/ ${prune_math} / }" 286 new_math=${new_math/ ${prune_math} / }
166 done 287 done
167 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 288 new_math=$(echo ${new_math})
289 new_math=${new_math// /,}
168 290
169 if [ -z "${new_math}" ] ; then 291 if [[ -z ${new_math} ]] ; then
170 # if we're removing all user specified math values are 292 # if we're removing all user specified math values are
171 # slated for removal, then we just filter the flag 293 # slated for removal, then we just filter the flag
172 filter-flags ${orig_mfpmath} 294 filter-flags ${orig_mfpmath}
173 else 295 else
174 # if we only want to filter some of the user specified 296 # if we only want to filter some of the user specified
… …
176 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 298 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
177 fi 299 fi
178 return 0 300 return 0
179} 301}
180 302
303# @FUNCTION: strip-flags
304# @DESCRIPTION:
305# Strip C[XX]FLAGS of everything except known good/safe flags.
181strip-flags() { 306strip-flags() {
307 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
308
182 setup-allowed-flags 309 setup-allowed-flags
183 310
184 local NEW_CFLAGS="" 311 local NEW_CFLAGS=""
185 local NEW_CXXFLAGS="" 312 local NEW_CXXFLAGS=""
313 local NEW_FFLAGS=""
314 local NEW_FCFLAGS=""
186 315
187 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 316 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
188 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 317 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
189 use debug && einfo "Enabling the use of some unstable flags"
190 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 318 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
191 fi 319 fi
192 320
193 set -f 321 set -f # disable pathname expansion
194 322
195 for x in ${CFLAGS} 323 for x in ${CFLAGS}; do
196 do
197 for y in ${ALLOWED_FLAGS} 324 for y in ${ALLOWED_FLAGS}; do
198 do
199 flag=${x%%=*} 325 flag=${x%%=*}
200 if [ "${flag%%${y}}" = "" ] 326 if [ "${flag%%${y}}" = "" ] ; then
201 then
202 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 327 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
203 break 328 break
204 fi 329 fi
205 done 330 done
206 done 331 done
207 332
208 for x in ${CXXFLAGS} 333 for x in ${CXXFLAGS}; do
209 do
210 for y in ${ALLOWED_FLAGS} 334 for y in ${ALLOWED_FLAGS}; do
211 do
212 flag=${x%%=*} 335 flag=${x%%=*}
213 if [ "${flag%%${y}}" = "" ] 336 if [ "${flag%%${y}}" = "" ] ; then
214 then
215 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 337 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
216 break 338 break
217 fi 339 fi
218 done 340 done
219 done 341 done
220 342
343 for x in ${FFLAGS}; do
344 for y in ${ALLOWED_FLAGS}; do
345 flag=${x%%=*}
346 if [ "${flag%%${y}}" = "" ] ; then
347 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
348 break
349 fi
350 done
351 done
352
353 for x in ${FCFLAGS}; do
354 for y in ${ALLOWED_FLAGS}; do
355 flag=${x%%=*}
356 if [ "${flag%%${y}}" = "" ] ; then
357 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
358 break
359 fi
360 done
361 done
362
221 # In case we filtered out all optimization flags fallback to -O2 363 # In case we filtered out all optimization flags fallback to -O2
222 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 364 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
223 NEW_CFLAGS="${NEW_CFLAGS} -O2" 365 NEW_CFLAGS="${NEW_CFLAGS} -O2"
224 fi 366 fi
225 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 367 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
226 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 368 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
227 fi 369 fi
370 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
371 NEW_FFLAGS="${NEW_FFLAGS} -O2"
372 fi
373 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
374 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
375 fi
228 376
229 set +f 377 set +f # re-enable pathname expansion
230
231 use debug \
232 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
233 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
234 378
235 export CFLAGS="${NEW_CFLAGS}" 379 export CFLAGS="${NEW_CFLAGS}"
236 export CXXFLAGS="${NEW_CXXFLAGS}" 380 export CXXFLAGS="${NEW_CXXFLAGS}"
381 export FFLAGS="${NEW_FFLAGS}"
382 export FCFLAGS="${NEW_FCFLAGS}"
383 return 0
384}
385
386test-flag-PROG() {
387 local comp=$1
388 local flags="$2"
389
390 [[ -z ${comp} || -z ${flags} ]] && \
237 return 0 391 return 1
238}
239 392
393 local PROG=$(tc-get${comp})
394 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
395 > /dev/null 2>&1
396}
397
398# @FUNCTION: test-flag-CC
399# @USAGE: <flag>
400# @DESCRIPTION:
401# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
402test-flag-CC() { test-flag-PROG "CC" "$1"; }
403
404# @FUNCTION: test-flag-CXX
405# @USAGE: <flag>
406# @DESCRIPTION:
407# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
408test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
409
410# @FUNCTION: test-flag-F77
411# @USAGE: <flag>
412# @DESCRIPTION:
413# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
414test-flag-F77() { test-flag-PROG "F77" "$1"; }
415
416# @FUNCTION: test-flag-FC
417# @USAGE: <flag>
418# @DESCRIPTION:
419# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
420test-flag-FC() { test-flag-PROG "FC" "$1"; }
421
422test-flags-PROG() {
423 local comp=$1
424 local flags
425 local x
426
427 shift
428
429 [[ -z ${comp} ]] && return 1
430
431 x=""
432 for x in "$@" ; do
433 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
434 done
435
436 echo "${flags}"
437
438 # Just bail if we dont have any flags
439 [[ -n ${flags} ]]
440}
441
442# @FUNCTION: test-flags-CC
443# @USAGE: <flags>
444# @DESCRIPTION:
445# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
446test-flags-CC() { test-flags-PROG "CC" "$@"; }
447
448# @FUNCTION: test-flags-CXX
449# @USAGE: <flags>
450# @DESCRIPTION:
451# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
452test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
453
454# @FUNCTION: test-flags-F77
455# @USAGE: <flags>
456# @DESCRIPTION:
457# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
458test-flags-F77() { test-flags-PROG "F77" "$@"; }
459
460# @FUNCTION: test-flags-FC
461# @USAGE: <flags>
462# @DESCRIPTION:
463# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
464test-flags-FC() { test-flags-PROG "FC" "$@"; }
465
466# @FUNCTION: test-flags
467# @USAGE: <flags>
468# @DESCRIPTION:
469# Short-hand that should hopefully work for both C and C++ compiler, but
470# its really only present due to the append-flags() abomination.
471test-flags() { test-flags-CC "$@"; }
472
473# @FUNCTION: test_flag
474# @DESCRIPTION:
475# DEPRICIATED, use test-flags()
240test_flag() { 476test_flag() {
241 if [ -z "`gcc -S -xc "$@" -o /dev/null /dev/null 2>&1`" ]; then 477 ewarn "test_flag: deprecated, please use test-flags()!" >&2
242 echo "$@" 478
479 test-flags-CC "$@"
480}
481
482# @FUNCTION: test_version_info
483# @USAGE: <version>
484# @DESCRIPTION:
485# Returns shell true if the current C compiler version matches <version>, else returns shell false.
486# Accepts shell globs.
487test_version_info() {
488 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
243 return 0 489 return 0
244 fi 490 else
245 return 1 491 return 1
492 fi
246} 493}
247 494
495# @FUNCTION: strip-unsupported-flags
496# @DESCRIPTION:
497# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
248strip-unsupported-flags() { 498strip-unsupported-flags() {
249 for x in ${CFLAGS} ; do 499 export CFLAGS=$(test-flags-CC ${CFLAGS})
250 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 500 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
251 done 501 export FFLAGS=$(test-flags-F77 ${FFLAGS})
252 for x in ${CXXFLAGS} ; do 502 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
253 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
254 done
255
256 export CFLAGS="${NEW_CFLAGS}"
257 export CXXFLAGS="${NEW_CXXFLAGS}"
258} 503}
259 504
505# @FUNCTION: get-flag
506# @USAGE: <flag>
507# @DESCRIPTION:
508# Find and echo the value for a particular flag. Accepts shell globs.
260get-flag() { 509get-flag() {
510 local f findflag="$1"
511
261 # this code looks a little flaky but seems to work for 512 # this code looks a little flaky but seems to work for
262 # everything we want ... 513 # everything we want ...
263 # for example, if CFLAGS="-march=i686": 514 # for example, if CFLAGS="-march=i686":
264 # `get-flags -march` == "-march=i686" 515 # `get-flag -march` == "-march=i686"
265 # `get-flags march` == "i686" 516 # `get-flag march` == "i686"
266 local findflag="$1"
267 for f in ${CFLAGS} ${CXXFLAGS} ; do 517 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
268 if [ "${f/${findflag}}" != "${f}" ] ; then 518 if [ "${f/${findflag}}" != "${f}" ] ; then
269 echo "${f/-${findflag}=}" 519 printf "%s\n" "${f/-${findflag}=}"
270 return 0 520 return 0
271 fi 521 fi
272 done 522 done
273 return 1 523 return 1
274} 524}
275 525
526# @FUNCTION: has_hardened
527# @DESCRIPTION:
528# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
529has_hardened() {
530 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
531
532 test_version_info Hardened && return 0
533 # The specs file wont exist unless gcc has GCC_SPECS support
534 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
535}
536
537# @FUNCTION: has_pic
538# @DESCRIPTION:
539# DEPRECATED - use gcc-specs-pie from toolchain-funcs
540# indicate whether PIC is set
276has_pic() { 541has_pic() {
277 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 542 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
278 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 543
279 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0 544 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
545 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
546 gcc-specs-pie
547}
548
549# @FUNCTION: has_pie
550# @DESCRIPTION:
551# DEPRECATED - use gcc-specs-pie from toolchain-funcs
552# indicate whether PIE is set
553has_pie() {
554 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
555
556 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
557 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
558 gcc-specs-pie
559}
560
561# @FUNCTION: has_ssp_all
562# @DESCRIPTION:
563# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
564# indicate whether code for SSP is being generated for all functions
565has_ssp_all() {
566 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
567
568 # note; this matches only -fstack-protector-all
569 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
570 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
571 gcc-specs-ssp-to-all
572}
573
574# @FUNCTION: has_ssp
575# @DESCRIPTION:
576# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
577# indicate whether code for SSP is being generated
578has_ssp() {
579 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
580
581 # note; this matches both -fstack-protector and -fstack-protector-all
582 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
583 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
584 gcc-specs-ssp
585}
586
587# @FUNCTION: has_m64
588# @DESCRIPTION:
589# This doesn't test if the flag is accepted, it tests if the flag actually
590# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
591# return code is 0, else the return code is 1.
592has_m64() {
593 # this doesnt test if the flag is accepted, it tests if the flag
594 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
595 # please dont replace this function with test_flag in some future
596 # clean-up!
597
598 local temp="$(emktemp)"
599 echo "int main() { return(0); }" > "${temp}".c
600 MY_CC=$(tc-getCC)
601 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
602 local ret=$?
603 rm -f "${temp}".c
604 [[ ${ret} != 1 ]] && return 0
280 return 1 605 return 1
281} 606}
282 607
283has_pie() { 608# @FUNCTION: has_m32
284 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 609# @DESCRIPTION:
285 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 610# This doesn't test if the flag is accepted, it tests if the flag actually
286 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0 611# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
612# code is 0, else return code is 1.
613has_m32() {
614 # this doesnt test if the flag is accepted, it tests if the flag
615 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
616 # please dont replace this function with test_flag in some future
617 # clean-up!
618
619 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
620
621 local temp=$(emktemp)
622 echo "int main() { return(0); }" > "${temp}".c
623 MY_CC=$(tc-getCC)
624 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
625 local ret=$?
626 rm -f "${temp}".c
627 [[ ${ret} != 1 ]] && return 0
287 return 1 628 return 1
288} 629}
289
290has_ssp() {
291 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
292 [ ! -z "`${CC/ .*/} --version| grep ssp`" ] && return 0
293 return 1
294}
295 630
631# @FUNCTION: replace-sparc64-flags
632# @DESCRIPTION:
633# Sets mcpu to v8 and uses the original value as mtune if none specified.
296replace-sparc64-flags() { 634replace-sparc64-flags() {
297 local SPARC64_CPUS="ultrasparc v9" 635 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
298 636
299 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 637 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
300 then
301 for x in ${SPARC64_CPUS} 638 for x in ${SPARC64_CPUS}; do
302 do
303 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 639 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
304 done 640 done
305 else 641 else
306 for x in ${SPARC64_CPUS} 642 for x in ${SPARC64_CPUS}; do
307 do
308 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 643 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
309 done 644 done
310 fi 645 fi
311 646
312 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 647 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
313 then
314 for x in ${SPARC64_CPUS} 648 for x in ${SPARC64_CPUS}; do
315 do
316 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 649 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
317 done 650 done
318 else 651 else
319 for x in ${SPARC64_CPUS} 652 for x in ${SPARC64_CPUS}; do
320 do
321 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 653 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
322 done 654 done
323 fi 655 fi
324}
325 656
657 export CFLAGS CXXFLAGS
658}
659
660# @FUNCTION: append-ldflags
661# @USAGE: <flags>
662# @DESCRIPTION:
663# Add extra <flags> to the current LDFLAGS.
326append-ldflags() { 664append-ldflags() {
665 [[ -z $* ]] && return 0
666 local flag
667 for flag in "$@"; do
668 [[ ${flag} == -l* ]] && \
669 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
670 done
671
327 LDFLAGS="${LDFLAGS} $@" 672 export LDFLAGS="${LDFLAGS} $*"
328 return 0 673 return 0
329} 674}
330 675
676# @FUNCTION: filter-ldflags
677# @USAGE: <flags>
678# @DESCRIPTION:
679# Remove particular <flags> from LDFLAGS. Accepts shell globs.
331filter-ldflags() { 680filter-ldflags() {
332 # we do this fancy spacing stuff so as to not filter 681 _filter-var LDFLAGS "$@"
333 # out part of a flag ... we want flag atoms ! :D 682 return 0
334 LDFLAGS=" ${LDFLAGS} " 683}
684
685# @FUNCTION: raw-ldflags
686# @USAGE: <flags>
687# @DESCRIPTION:
688# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
689# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
690# to gcc where it needs the '-Wl,'.
691raw-ldflags() {
692 local x input="$@"
693 [[ -z ${input} ]] && input=${LDFLAGS}
694 set --
335 for x in "$@" ; do 695 for x in ${input} ; do
336 LDFLAGS="${LDFLAGS// ${x} / }" 696 x=${x#-Wl,}
697 set -- "$@" ${x//,/ }
337 done 698 done
338 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 699 echo "$@"
339 return 0
340} 700}
341 701
342etexec-flags() { 702# @FUNCTION: bindnow-flags
343 has_pie || has_pic 703# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
344 if [ $? == 0 ] ; then 704# @DESCRIPTION:
345 [ -z "`is-flag -fno-pic`" ] && 705# DEPRECATED - Gets the flags needed for "NOW" binding
346 export CFLAGS="${CFLAGS} `test_flag -fno-pic`" 706bindnow-flags() {
347 707 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild"
348 [ -z "`is-flag -nopie`" ] &&
349 export CFLAGS="${CFLAGS} `test_flag -nopie`"
350 fi
351} 708}
352 709
353fstack-flags() { 710
354 has_ssp 711# Some tests for when we screw with things and want to make
355 if [ $? == 0 ] ; then 712# sure we didn't break anything
356 [ -z "`is-flag -fno-stack-protector`" ] && 713#TESTS() {
357 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 714# CFLAGS="-a -b -c=1"
358 fi 715# CXXFLAGS="-x -y -z=2"
359} 716# LDFLAGS="-l -m -n=3"
717#
718# die() { exit 1; }
719# (is-flag 1 2 3) && die
720# (is-ldflag 1 2 3) && die
721#
722# is-flagq -l && die
723# is-ldflagq -a && die
724# is-flagq -a || die
725# is-flagq -x || die
726# is-ldflagq -n=* || die
727# is-ldflagq -n && die
728#
729# strip-unsupported-flags
730# [[ ${CFLAGS} == "-c=1" ]] || die
731# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
732#
733# echo "All tests pass"
734#}
735#TESTS
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