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Revision 1.40 Revision 1.114
1# Copyright 1999-2003 Gentoo Technologies, Inc. 1# Copyright 1999-2006 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 1.40 2004/03/12 11:21:15 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.114 2006/12/27 00:52:12 vapier Exp $
4# 4#
5# Author Bart Verwilst <verwilst@gentoo.org> 5# Maintainer: base-system@gentoo.org
6 6
7ECLASS=flag-o-matic 7# need access to emktemp()
8INHERITED="$INHERITED $ECLASS" 8inherit eutils toolchain-funcs multilib
9 9
10# 10#
11#### filter-flags <flags> #### 11#### filter-flags <flags> ####
12# Remove particular flags from C[XX]FLAGS 12# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags 13# Matches only complete flags
16# Add extra flags to your current C[XX]FLAGS 16# Add extra flags to your current C[XX]FLAGS
17# 17#
18#### replace-flags <orig.flag> <new.flag> ### 18#### replace-flags <orig.flag> <new.flag> ###
19# Replace a flag by another one 19# Replace a flag by another one
20# 20#
21#### replace-cpu-flags <new.cpu> <old.cpus> ### 21#### replace-cpu-flags <old.cpus> <new.cpu> ###
22# Replace march/mcpu flags that specify <old.cpus> 22# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu> 23# with flags that specify <new.cpu>
24# 24#
25#### is-flag <flag> #### 25#### is-flag[q] <flag> ####
26# Returns "true" if flag is set in C[XX]FLAGS 26# Returns "true" if flag is set in C[XX]FLAGS
27# Matches only complete a flag 27# Matches only complete a flag
28# q version sets return code but doesn't echo
29#
30#### is-ldflag[q] <flag> ####
31# Returns "true" if flag is set in LDFLAGS
32# Matches only complete a flag
33# q version sets return code but doesn't echo
28# 34#
29#### strip-flags #### 35#### strip-flags ####
30# Strip C[XX]FLAGS of everything except known 36# Strip C[XX]FLAGS of everything except known
31# good options. 37# good options.
32# 38#
47# will leave the user with -mfpmath=386 53# will leave the user with -mfpmath=386
48# 54#
49#### append-ldflags #### 55#### append-ldflags ####
50# Add extra flags to your current LDFLAGS 56# Add extra flags to your current LDFLAGS
51# 57#
52#### etexec-flags #### 58#### filter-ldflags <flags> ####
53# hooked function for hardened-gcc that appends 59# Remove particular flags from LDFLAGS
54# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed 60# Matches only complete flags
55# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
56# 61#
57#### fstack-flags #### 62#### bindnow-flags ####
58# hooked function for hardened-gcc that appends 63# Returns the flags to enable "now" binding in the current selected linker.
59# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed 64#
60# and a package is filtering -fstack-protector, -fstack-protector-all 65################ DEPRECATED functions ################
66# The following are still present to avoid breaking existing
67# code more than necessary; however they are deprecated. Please
68# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# need to know which hardened techs are active in the compiler.
70# See bug #100974
71#
72#### has_hardened ####
73# Returns true if the compiler has 'Hardened' in its version string,
74# (note; switched-spec vanilla compilers satisfy this condition) or
75# the specs file name contains 'hardened'.
76#
77#### has_pie ####
78# Returns true if the compiler by default or with current CFLAGS
79# builds position-independent code.
80#
81#### has_pic ####
82# Returns true if the compiler by default or with current CFLAGS
83# builds position-independent code.
84#
85#### has_ssp_all ####
86# Returns true if the compiler by default or with current CFLAGS
87# generates stack smash protections for all functions
88#
89#### has_ssp ####
90# Returns true if the compiler by default or with current CFLAGS
91# generates stack smash protections for most vulnerable functions
61# 92#
62 93
63# C[XX]FLAGS that we allow in strip-flags 94# C[XX]FLAGS that we allow in strip-flags
64setup-allowed-flags() { 95setup-allowed-flags() {
65 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 96 if [[ -z ${ALLOWED_FLAGS} ]] ; then
66 case "${ARCH}" in 97 export ALLOWED_FLAGS="-pipe"
67 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
68 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
69 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
70 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
71 esac 102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
104 fi
105 # allow a bunch of flags that negate features / control ABI
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
108 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
109 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
110 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
111 -mieee -mieee-with-inexact -mschedule \
112 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
113 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
114 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
115 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
116 -msecure-plt"
72 117
73 # C[XX]FLAGS that we are think is ok, but needs testing 118 # C[XX]FLAGS that we are think is ok, but needs testing
74 # NOTE: currently -Os have issues with gcc3 and K6* arch's 119 # NOTE: currently -Os have issues with gcc3 and K6* arch's
75 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 120 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
76 return 0 121 return 0
122}
123
124# inverted filters for hardened compiler. This is trying to unpick
125# the hardened compiler defaults.
126_filter-hardened() {
127 local f
128 for f in "$@" ; do
129 case "${f}" in
130 # Ideally we should only concern ourselves with PIE flags,
131 # not -fPIC or -fpic, but too many places filter -fPIC without
132 # thinking about -fPIE.
133 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
134 gcc-specs-pie || continue
135 is-flagq -nopie || append-flags -nopie;;
136 -fstack-protector)
137 gcc-specs-ssp || continue
138 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
139 -fstack-protector-all)
140 gcc-specs-ssp-to-all || continue
141 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
142 esac
143 done
144}
145
146# Remove occurrences of strings from variable given in $1
147# Strings removed are matched as globs, so for example
148# '-O*' would remove -O1, -O2 etc.
149_filter-var() {
150 local f x VAR VAL
151 declare -a new
152
153 VAR=$1
154 shift
155 eval VAL=\${${VAR}}
156 for f in ${VAL}; do
157 for x in "$@"; do
158 # Note this should work with globs like -O*
159 [[ ${f} == ${x} ]] && continue 2
160 done
161 eval new\[\${\#new\[@]}]=\${f}
162 done
163 eval export ${VAR}=\${new\[*]}
77} 164}
78 165
79filter-flags() { 166filter-flags() {
80 for x in "$@" ; do 167 _filter-hardened "$@"
81 case "${x}" in 168 _filter-var CFLAGS "$@"
82 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 169 _filter-var CXXFLAGS "$@"
83 -fstack-protector|-fstack-protector-all) fstack-flags;;
84 *) ;;
85 esac
86 done
87
88 # we do this fancy spacing stuff so as to not filter
89 # out part of a flag ... we want flag atoms ! :D
90 CFLAGS=" ${CFLAGS} "
91 CXXFLAGS=" ${CXXFLAGS} "
92 for x in "$@" ; do
93 CFLAGS="${CFLAGS// ${x} / }"
94 CXXFLAGS="${CXXFLAGS// ${x} / }"
95 done
96 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
97 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
98 return 0 170 return 0
99} 171}
100 172
101filter-lfs-flags() { 173filter-lfs-flags() {
174 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
102 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 175 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
103} 176}
104 177
178append-lfs-flags() {
179 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
180 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
181}
182
105append-flags() { 183append-flags() {
184 [[ -z $* ]] && return 0
106 export CFLAGS="${CFLAGS} $@" 185 export CFLAGS="${CFLAGS} $*"
107 export CXXFLAGS="${CXXFLAGS} $@" 186 export CXXFLAGS="${CXXFLAGS} $*"
108 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
109 return 0 187 return 0
110} 188}
111 189
112replace-flags() { 190replace-flags() {
113 # we do this fancy spacing stuff so as to not filter 191 [[ $# != 2 ]] \
114 # out part of a flag ... we want flag atoms ! :D 192 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
115 CFLAGS=" ${CFLAGS} " 193 && die "replace-flags takes 2 arguments, not $#"
116 CXXFLAGS=" ${CXXFLAGS} " 194
117 CFLAGS="${CFLAGS// ${1} / ${2} }" 195 local f fset
118 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 196 declare -a new_CFLAGS new_CXXFLAGS
119 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 197
120 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 198 for fset in CFLAGS CXXFLAGS; do
199 # Looping over the flags instead of using a global
200 # substitution ensures that we're working with flag atoms.
201 # Otherwise globs like -O* have the potential to wipe out the
202 # list of flags.
203 for f in ${!fset}; do
204 # Note this should work with globs like -O*
205 [[ ${f} == ${1} ]] && f=${2}
206 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
207 done
208 eval export ${fset}=\${new_${fset}\[*]}
209 done
210
121 return 0 211 return 0
122} 212}
123 213
124replace-cpu-flags() { 214replace-cpu-flags() {
125 local newcpu="$1" ; shift 215 local newcpu="$#" ; newcpu="${!newcpu}"
126 local oldcpu="" 216 while [ $# -gt 1 ] ; do
127 for oldcpu in "$@" ; do 217 # quote to make sure that no globbing is done (particularly on
218 # ${oldcpu}) prior to calling replace-flags
128 replace-flags -march=${oldcpu} -march=${newcpu} 219 replace-flags "-march=${1}" "-march=${newcpu}"
129 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 220 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
130 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 221 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
222 shift
131 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
132 return 0 232 return 1
233}
234
235is-flagq() {
236 [[ -n $2 ]] && die "Usage: is-flag <flag>"
237 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1
133} 238}
134 239
135is-flag() { 240is-flag() {
136 for x in ${CFLAGS} ${CXXFLAGS} ; do 241 is-flagq "$@" && echo true
137 if [ "${x}" == "$1" ] ; then 242}
138 echo true 243
139 return 0 244is-ldflagq() {
140 fi 245 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
141 done 246 _is_flagq LDFLAGS $1
142 return 1 247}
248
249is-ldflag() {
250 is-ldflagq "$@" && echo true
143} 251}
144 252
145filter-mfpmath() { 253filter-mfpmath() {
254 local orig_mfpmath new_math prune_math
255
146 # save the original -mfpmath flag 256 # save the original -mfpmath flag
147 local orig_mfpmath="`get-flag -mfpmath`" 257 orig_mfpmath=$(get-flag -mfpmath)
148 # get the value of the current -mfpmath flag 258 # get the value of the current -mfpmath flag
149 local new_math=" `get-flag mfpmath | tr , ' '` " 259 new_math=$(get-flag mfpmath)
260 new_math=" ${new_math//,/ } "
150 # figure out which math values are to be removed 261 # figure out which math values are to be removed
151 local prune_math="" 262 prune_math=""
152 for prune_math in "$@" ; do 263 for prune_math in "$@" ; do
153 new_math="${new_math/ ${prune_math} / }" 264 new_math=${new_math/ ${prune_math} / }
154 done 265 done
155 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 266 new_math=$(echo ${new_math})
267 new_math=${new_math// /,}
156 268
157 if [ -z "${new_math}" ] ; then 269 if [[ -z ${new_math} ]] ; then
158 # if we're removing all user specified math values are 270 # if we're removing all user specified math values are
159 # slated for removal, then we just filter the flag 271 # slated for removal, then we just filter the flag
160 filter-flags ${orig_mfpmath} 272 filter-flags ${orig_mfpmath}
161 else 273 else
162 # if we only want to filter some of the user specified 274 # if we only want to filter some of the user specified
165 fi 277 fi
166 return 0 278 return 0
167} 279}
168 280
169strip-flags() { 281strip-flags() {
282 local x y flag NEW_CFLAGS NEW_CXXFLAGS
283
170 setup-allowed-flags 284 setup-allowed-flags
171 285
172 local NEW_CFLAGS="" 286 local NEW_CFLAGS=""
173 local NEW_CXXFLAGS="" 287 local NEW_CXXFLAGS=""
174 288
175 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 289 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
176 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 290 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
177 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
178 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 291 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
179 fi 292 fi
180 293
181 set -f 294 set -f # disable pathname expansion
182 295
183 for x in ${CFLAGS} 296 for x in ${CFLAGS}; do
184 do
185 for y in ${ALLOWED_FLAGS} 297 for y in ${ALLOWED_FLAGS}; do
186 do
187 flag=${x%%=*} 298 flag=${x%%=*}
188 if [ "${flag%%${y}}" = "" ] 299 if [ "${flag%%${y}}" = "" ] ; then
189 then
190 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 300 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
191 break 301 break
192 fi 302 fi
193 done 303 done
194 done 304 done
195 305
196 for x in ${CXXFLAGS} 306 for x in ${CXXFLAGS}; do
197 do
198 for y in ${ALLOWED_FLAGS} 307 for y in ${ALLOWED_FLAGS}; do
199 do
200 flag=${x%%=*} 308 flag=${x%%=*}
201 if [ "${flag%%${y}}" = "" ] 309 if [ "${flag%%${y}}" = "" ] ; then
202 then
203 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 310 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
204 break 311 break
205 fi 312 fi
206 done 313 done
207 done 314 done
212 fi 319 fi
213 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 320 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
214 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 321 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
215 fi 322 fi
216 323
217 set +f 324 set +f # re-enable pathname expansion
218
219 [ `use debug` ] \
220 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
221 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
222 325
223 export CFLAGS="${NEW_CFLAGS}" 326 export CFLAGS="${NEW_CFLAGS}"
224 export CXXFLAGS="${NEW_CXXFLAGS}" 327 export CXXFLAGS="${NEW_CXXFLAGS}"
225 return 0 328 return 0
226} 329}
227 330
331test-flag-PROG() {
332 local comp=$1
333 local flags="$2"
334
335 [[ -z ${comp} || -z ${flags} ]] && \
336 return 1
337
338 local PROG=$(tc-get${comp})
339 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
340 > /dev/null 2>&1
341}
342
343# Returns true if C compiler support given flag
344test-flag-CC() { test-flag-PROG "CC" "$1"; }
345
346# Returns true if C++ compiler support given flag
347test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
348
349test-flags-PROG() {
350 local comp=$1
351 local flags
352 local x
353
354 shift
355
356 [[ -z ${comp} ]] && return 1
357
358 x=""
359 for x in "$@" ; do
360 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
361 done
362
363 echo "${flags}"
364
365 # Just bail if we dont have any flags
366 [[ -n ${flags} ]]
367}
368
369# Returns (echo's) the given flags supported by the C compiler
370test-flags-CC() { test-flags-PROG "CC" "$@"; }
371
372# Returns (echo's) the given flags supported by the C++ compiler
373test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
374
375# Short-hand that should hopefully work for both C and C++ compiler, but
376# its really only present due to the append-flags() abomination.
377test-flags() { test-flags-CC "$@"; }
378
379# Depriciated, use test-flags()
228test_flag() { 380test_flag() {
229 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then 381 ewarn "test_flag: deprecated, please use test-flags()!" >&2
230 echo "$@" 382
383 test-flags-CC "$@"
384}
385
386test_version_info() {
387 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
231 return 0 388 return 0
232 fi 389 else
233 return 1 390 return 1
391 fi
234} 392}
235 393
236strip-unsupported-flags() { 394strip-unsupported-flags() {
237 for x in ${CFLAGS} ; do 395 export CFLAGS=$(test-flags-CC ${CFLAGS})
238 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 396 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
239 done
240 for x in ${CXXFLAGS} ; do
241 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
242 done
243
244 export CFLAGS="${NEW_CFLAGS}"
245 export CXXFLAGS="${NEW_CXXFLAGS}"
246} 397}
247 398
248get-flag() { 399get-flag() {
400 local f findflag="$1"
401
249 # this code looks a little flaky but seems to work for 402 # this code looks a little flaky but seems to work for
250 # everything we want ... 403 # everything we want ...
251 # for example, if CFLAGS="-march=i686": 404 # for example, if CFLAGS="-march=i686":
252 # `get-flags -march` == "-march=i686" 405 # `get-flag -march` == "-march=i686"
253 # `get-flags march` == "i686" 406 # `get-flag march` == "i686"
254 local findflag="$1"
255 for f in ${CFLAGS} ${CXXFLAGS} ; do 407 for f in ${CFLAGS} ${CXXFLAGS} ; do
256 if [ "${f/${findflag}}" != "${f}" ] ; then 408 if [ "${f/${findflag}}" != "${f}" ] ; then
257 echo "${f/-${findflag}=}" 409 printf "%s\n" "${f/-${findflag}=}"
258 return 0 410 return 0
259 fi 411 fi
260 done 412 done
261 return 1 413 return 1
262} 414}
263 415
416# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
417has_hardened() {
418 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
419
420 test_version_info Hardened && return 0
421 # The specs file wont exist unless gcc has GCC_SPECS support
422 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
423}
424
425# DEPRECATED - use gcc-specs-pie from toolchain-funcs
426# indicate whether PIC is set
427has_pic() {
428 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
429
430 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
431 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
432 gcc-specs-pie
433}
434
435# DEPRECATED - use gcc-specs-pie from toolchain-funcs
436# indicate whether PIE is set
437has_pie() {
438 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
439
440 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
441 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
442 gcc-specs-pie
443}
444
445# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
446# indicate whether code for SSP is being generated for all functions
447has_ssp_all() {
448 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
449
450 # note; this matches only -fstack-protector-all
451 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
452 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
453 gcc-specs-ssp-all
454}
455
456# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
457# indicate whether code for SSP is being generated
458has_ssp() {
459 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
460
461 # note; this matches both -fstack-protector and -fstack-protector-all
462 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
463 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
464 gcc-specs-ssp
465}
466
467has_m64() {
468 # this doesnt test if the flag is accepted, it tests if the flag
469 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
470 # please dont replace this function with test_flag in some future
471 # clean-up!
472
473 local temp="$(emktemp)"
474 echo "int main() { return(0); }" > "${temp}".c
475 MY_CC=$(tc-getCC)
476 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
477 local ret=$?
478 rm -f "${temp}".c
479 [[ ${ret} != 1 ]] && return 0
480 return 1
481}
482
483has_m32() {
484 # this doesnt test if the flag is accepted, it tests if the flag
485 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
486 # please dont replace this function with test_flag in some future
487 # clean-up!
488
489 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
490
491 local temp=$(emktemp)
492 echo "int main() { return(0); }" > "${temp}".c
493 MY_CC=$(tc-getCC)
494 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
495 local ret=$?
496 rm -f "${temp}".c
497 [[ ${ret} != 1 ]] && return 0
498 return 1
499}
500
264replace-sparc64-flags() { 501replace-sparc64-flags() {
265 local SPARC64_CPUS="ultrasparc v9" 502 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
266 503
267 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 504 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
268 then
269 for x in ${SPARC64_CPUS} 505 for x in ${SPARC64_CPUS}; do
270 do
271 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 506 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
272 done 507 done
273 else 508 else
274 for x in ${SPARC64_CPUS} 509 for x in ${SPARC64_CPUS}; do
275 do
276 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 510 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
277 done 511 done
278 fi 512 fi
279 513
280 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 514 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
281 then
282 for x in ${SPARC64_CPUS} 515 for x in ${SPARC64_CPUS}; do
283 do
284 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 516 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
285 done 517 done
286 else 518 else
287 for x in ${SPARC64_CPUS} 519 for x in ${SPARC64_CPUS}; do
288 do
289 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 520 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
290 done 521 done
291 fi 522 fi
523
524 export CFLAGS CXXFLAGS
292} 525}
293 526
294append-ldflags() { 527append-ldflags() {
528 [[ -z $* ]] && return 0
295 LDFLAGS="${LDFLAGS} $@" 529 export LDFLAGS="${LDFLAGS} $*"
296 return 0 530 return 0
297} 531}
298 532
299etexec-flags() { 533# Remove flags from LDFLAGS - it's up to the ebuild to filter
300 has_version sys-devel/hardened-gcc 534# CFLAGS and CXXFLAGS via filter-flags if they need to.
301 if [ $? == 0 ] ; then 535filter-ldflags() {
302 if [ "`is-flag -yet_exec`" != "true" ]; then 536 _filter-var LDFLAGS "$@"
303 debug-print ">>> appending flags -yet_exec" 537 return 0
304 append-flags -yet_exec
305 append-ldflags -yet_exec
306 fi
307 fi
308} 538}
309 539
310fstack-flags() { 540# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
311 has_version sys-devel/hardened-gcc 541# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
312 if [ $? == 0 ] ; then 542# to gcc where it needs the '-Wl,'.
313 if [ "`is-flag -yno_propolice`" != "true" ]; then 543raw-ldflags() {
314 debug-print ">>> appending flags -yno_propolice" 544 local x input="$@"
315 append-flags -yno_propolice 545 [[ -z ${input} ]] && input=${LDFLAGS}
316 append-ldflags -yno_propolice 546 set --
317 fi 547 for x in ${input} ; do
318 fi 548 x=${x#-Wl,}
549 set -- "$@" ${x//,/ }
550 done
551 echo "$@"
319} 552}
553
554# Gets the flags needed for "NOW" binding
555bindnow-flags() {
556 case $($(tc-getLD) -v 2>&1 </dev/null) in
557 *GNU* | *'with BFD'*) # GNU ld
558 echo "-Wl,-z,now" ;;
559 *Apple*) # Darwin ld
560 echo "-bind_at_load" ;;
561 *)
562 # Some linkers just recognize -V instead of -v
563 case $($(tc-getLD) -V 2>&1 </dev/null) in
564 *Solaris*) # Solaris accept almost the same GNU options
565 echo "-Wl,-z,now" ;;
566 esac
567 ;;
568 esac
569}
570
571
572# Some tests for when we screw with things and want to make
573# sure we didn't break anything
574#TESTS() {
575# CFLAGS="-a -b -c=1"
576# CXXFLAGS="-x -y -z=2"
577# LDFLAGS="-l -m -n=3"
578#
579# die() { exit 1; }
580# (is-flag 1 2 3) && die
581# (is-ldflag 1 2 3) && die
582#
583# is-flagq -l && die
584# is-ldflagq -a && die
585# is-flagq -a || die
586# is-flagq -x || die
587# is-ldflagq -n=* || die
588# is-ldflagq -n && die
589#
590# strip-unsupported-flags
591# [[ ${CFLAGS} == "-c=1" ]] || die
592# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
593#
594# echo "All tests pass"
595#}
596#TESTS

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