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Revision 1.40 Revision 1.117
1# Copyright 1999-2003 Gentoo Technologies, Inc. 1# Copyright 1999-2007 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 1.117 2007/03/04 21:13:17 vapier Exp $
4# 4#
5# Author Bart Verwilst <verwilst@gentoo.org> 5# Maintainer: toolchain@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
95# Note: shell globs and character lists are allowed
64setup-allowed-flags() { 96setup-allowed-flags() {
65 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 97 if [[ -z ${ALLOWED_FLAGS} ]] ; then
66 case "${ARCH}" in 98 export ALLOWED_FLAGS="-pipe"
67 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
68 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
69 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
70 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
71 esac 103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
104 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
105 fi
106 # allow a bunch of flags that negate features / control ABI
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
108 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
109 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
110 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
111 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
112 -mieee -mieee-with-inexact -mschedule \
113 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
114 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
115 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
116 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
117 -msecure-plt -D*"
72 118
73 # C[XX]FLAGS that we are think is ok, but needs testing 119 # C[XX]FLAGS that we are think is ok, but needs testing
74 # NOTE: currently -Os have issues with gcc3 and K6* arch's 120 # NOTE: currently -Os have issues with gcc3 and K6* arch's
75 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 121 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
76 return 0 122 return 0
123}
124
125# inverted filters for hardened compiler. This is trying to unpick
126# the hardened compiler defaults.
127_filter-hardened() {
128 local f
129 for f in "$@" ; do
130 case "${f}" in
131 # Ideally we should only concern ourselves with PIE flags,
132 # not -fPIC or -fpic, but too many places filter -fPIC without
133 # thinking about -fPIE.
134 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
135 gcc-specs-pie || continue
136 is-flagq -nopie || append-flags -nopie;;
137 -fstack-protector)
138 gcc-specs-ssp || continue
139 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
140 -fstack-protector-all)
141 gcc-specs-ssp-to-all || continue
142 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
143 esac
144 done
145}
146
147# Remove occurrences of strings from variable given in $1
148# Strings removed are matched as globs, so for example
149# '-O*' would remove -O1, -O2 etc.
150_filter-var() {
151 local f x VAR VAL
152 declare -a new
153
154 VAR=$1
155 shift
156 eval VAL=\${${VAR}}
157 for f in ${VAL}; do
158 for x in "$@"; do
159 # Note this should work with globs like -O*
160 [[ ${f} == ${x} ]] && continue 2
161 done
162 eval new\[\${\#new\[@]}]=\${f}
163 done
164 eval export ${VAR}=\${new\[*]}
77} 165}
78 166
79filter-flags() { 167filter-flags() {
80 for x in "$@" ; do 168 _filter-hardened "$@"
81 case "${x}" in 169 _filter-var CFLAGS "$@"
82 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 170 _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 0 171 return 0
99} 172}
100 173
101filter-lfs-flags() { 174filter-lfs-flags() {
175 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
102 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 176 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
103} 177}
104 178
179append-lfs-flags() {
180 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
181 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
182}
183
105append-flags() { 184append-flags() {
185 [[ -z $* ]] && return 0
106 export CFLAGS="${CFLAGS} $@" 186 export CFLAGS="${CFLAGS} $*"
107 export CXXFLAGS="${CXXFLAGS} $@" 187 export CXXFLAGS="${CXXFLAGS} $*"
108 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
109 return 0 188 return 0
110} 189}
111 190
112replace-flags() { 191replace-flags() {
113 # we do this fancy spacing stuff so as to not filter 192 [[ $# != 2 ]] \
114 # out part of a flag ... we want flag atoms ! :D 193 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
115 CFLAGS=" ${CFLAGS} " 194 && die "replace-flags takes 2 arguments, not $#"
116 CXXFLAGS=" ${CXXFLAGS} " 195
117 CFLAGS="${CFLAGS// ${1} / ${2} }" 196 local f fset
118 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 197 declare -a new_CFLAGS new_CXXFLAGS
119 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 198
120 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 199 for fset in CFLAGS CXXFLAGS; do
200 # Looping over the flags instead of using a global
201 # substitution ensures that we're working with flag atoms.
202 # Otherwise globs like -O* have the potential to wipe out the
203 # list of flags.
204 for f in ${!fset}; do
205 # Note this should work with globs like -O*
206 [[ ${f} == ${1} ]] && f=${2}
207 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
208 done
209 eval export ${fset}=\${new_${fset}\[*]}
210 done
211
121 return 0 212 return 0
122} 213}
123 214
124replace-cpu-flags() { 215replace-cpu-flags() {
125 local newcpu="$1" ; shift 216 local newcpu="$#" ; newcpu="${!newcpu}"
126 local oldcpu="" 217 while [ $# -gt 1 ] ; do
127 for oldcpu in "$@" ; do 218 # quote to make sure that no globbing is done (particularly on
219 # ${oldcpu}) prior to calling replace-flags
128 replace-flags -march=${oldcpu} -march=${newcpu} 220 replace-flags "-march=${1}" "-march=${newcpu}"
129 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 221 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
130 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 222 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
223 shift
131 done 224 done
225 return 0
226}
227
228_is_flagq() {
229 local x
230 for x in ${!1} ; do
231 [[ ${x} == $2 ]] && return 0
232 done
132 return 0 233 return 1
234}
235
236is-flagq() {
237 [[ -n $2 ]] && die "Usage: is-flag <flag>"
238 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1
133} 239}
134 240
135is-flag() { 241is-flag() {
136 for x in ${CFLAGS} ${CXXFLAGS} ; do 242 is-flagq "$@" && echo true
137 if [ "${x}" == "$1" ] ; then 243}
138 echo true 244
139 return 0 245is-ldflagq() {
140 fi 246 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
141 done 247 _is_flagq LDFLAGS $1
142 return 1 248}
249
250is-ldflag() {
251 is-ldflagq "$@" && echo true
143} 252}
144 253
145filter-mfpmath() { 254filter-mfpmath() {
255 local orig_mfpmath new_math prune_math
256
146 # save the original -mfpmath flag 257 # save the original -mfpmath flag
147 local orig_mfpmath="`get-flag -mfpmath`" 258 orig_mfpmath=$(get-flag -mfpmath)
148 # get the value of the current -mfpmath flag 259 # get the value of the current -mfpmath flag
149 local new_math=" `get-flag mfpmath | tr , ' '` " 260 new_math=$(get-flag mfpmath)
261 new_math=" ${new_math//,/ } "
150 # figure out which math values are to be removed 262 # figure out which math values are to be removed
151 local prune_math="" 263 prune_math=""
152 for prune_math in "$@" ; do 264 for prune_math in "$@" ; do
153 new_math="${new_math/ ${prune_math} / }" 265 new_math=${new_math/ ${prune_math} / }
154 done 266 done
155 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 267 new_math=$(echo ${new_math})
268 new_math=${new_math// /,}
156 269
157 if [ -z "${new_math}" ] ; then 270 if [[ -z ${new_math} ]] ; then
158 # if we're removing all user specified math values are 271 # if we're removing all user specified math values are
159 # slated for removal, then we just filter the flag 272 # slated for removal, then we just filter the flag
160 filter-flags ${orig_mfpmath} 273 filter-flags ${orig_mfpmath}
161 else 274 else
162 # if we only want to filter some of the user specified 275 # if we only want to filter some of the user specified
165 fi 278 fi
166 return 0 279 return 0
167} 280}
168 281
169strip-flags() { 282strip-flags() {
283 local x y flag NEW_CFLAGS NEW_CXXFLAGS
284
170 setup-allowed-flags 285 setup-allowed-flags
171 286
172 local NEW_CFLAGS="" 287 local NEW_CFLAGS=""
173 local NEW_CXXFLAGS="" 288 local NEW_CXXFLAGS=""
174 289
175 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 290 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
176 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 291 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
177 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
178 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 292 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
179 fi 293 fi
180 294
181 set -f 295 set -f # disable pathname expansion
182 296
183 for x in ${CFLAGS} 297 for x in ${CFLAGS}; do
184 do
185 for y in ${ALLOWED_FLAGS} 298 for y in ${ALLOWED_FLAGS}; do
186 do
187 flag=${x%%=*} 299 flag=${x%%=*}
188 if [ "${flag%%${y}}" = "" ] 300 if [ "${flag%%${y}}" = "" ] ; then
189 then
190 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 301 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
191 break 302 break
192 fi 303 fi
193 done 304 done
194 done 305 done
195 306
196 for x in ${CXXFLAGS} 307 for x in ${CXXFLAGS}; do
197 do
198 for y in ${ALLOWED_FLAGS} 308 for y in ${ALLOWED_FLAGS}; do
199 do
200 flag=${x%%=*} 309 flag=${x%%=*}
201 if [ "${flag%%${y}}" = "" ] 310 if [ "${flag%%${y}}" = "" ] ; then
202 then
203 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 311 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
204 break 312 break
205 fi 313 fi
206 done 314 done
207 done 315 done
212 fi 320 fi
213 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 321 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
214 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 322 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
215 fi 323 fi
216 324
217 set +f 325 set +f # re-enable pathname expansion
218
219 [ `use debug` ] \
220 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
221 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
222 326
223 export CFLAGS="${NEW_CFLAGS}" 327 export CFLAGS="${NEW_CFLAGS}"
224 export CXXFLAGS="${NEW_CXXFLAGS}" 328 export CXXFLAGS="${NEW_CXXFLAGS}"
225 return 0 329 return 0
226} 330}
227 331
332test-flag-PROG() {
333 local comp=$1
334 local flags="$2"
335
336 [[ -z ${comp} || -z ${flags} ]] && \
337 return 1
338
339 local PROG=$(tc-get${comp})
340 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
341 > /dev/null 2>&1
342}
343
344# Returns true if C compiler support given flag
345test-flag-CC() { test-flag-PROG "CC" "$1"; }
346
347# Returns true if C++ compiler support given flag
348test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
349
350test-flags-PROG() {
351 local comp=$1
352 local flags
353 local x
354
355 shift
356
357 [[ -z ${comp} ]] && return 1
358
359 x=""
360 for x in "$@" ; do
361 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
362 done
363
364 echo "${flags}"
365
366 # Just bail if we dont have any flags
367 [[ -n ${flags} ]]
368}
369
370# Returns (echo's) the given flags supported by the C compiler
371test-flags-CC() { test-flags-PROG "CC" "$@"; }
372
373# Returns (echo's) the given flags supported by the C++ compiler
374test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
375
376# Short-hand that should hopefully work for both C and C++ compiler, but
377# its really only present due to the append-flags() abomination.
378test-flags() { test-flags-CC "$@"; }
379
380# Depriciated, use test-flags()
228test_flag() { 381test_flag() {
229 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then 382 ewarn "test_flag: deprecated, please use test-flags()!" >&2
230 echo "$@" 383
384 test-flags-CC "$@"
385}
386
387test_version_info() {
388 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
231 return 0 389 return 0
232 fi 390 else
233 return 1 391 return 1
392 fi
234} 393}
235 394
236strip-unsupported-flags() { 395strip-unsupported-flags() {
237 for x in ${CFLAGS} ; do 396 export CFLAGS=$(test-flags-CC ${CFLAGS})
238 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 397 export CXXFLAGS=$(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} 398}
247 399
248get-flag() { 400get-flag() {
401 local f findflag="$1"
402
249 # this code looks a little flaky but seems to work for 403 # this code looks a little flaky but seems to work for
250 # everything we want ... 404 # everything we want ...
251 # for example, if CFLAGS="-march=i686": 405 # for example, if CFLAGS="-march=i686":
252 # `get-flags -march` == "-march=i686" 406 # `get-flag -march` == "-march=i686"
253 # `get-flags march` == "i686" 407 # `get-flag march` == "i686"
254 local findflag="$1"
255 for f in ${CFLAGS} ${CXXFLAGS} ; do 408 for f in ${CFLAGS} ${CXXFLAGS} ; do
256 if [ "${f/${findflag}}" != "${f}" ] ; then 409 if [ "${f/${findflag}}" != "${f}" ] ; then
257 echo "${f/-${findflag}=}" 410 printf "%s\n" "${f/-${findflag}=}"
258 return 0 411 return 0
259 fi 412 fi
260 done 413 done
261 return 1 414 return 1
262} 415}
263 416
417# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
418has_hardened() {
419 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
420
421 test_version_info Hardened && return 0
422 # The specs file wont exist unless gcc has GCC_SPECS support
423 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
424}
425
426# DEPRECATED - use gcc-specs-pie from toolchain-funcs
427# indicate whether PIC is set
428has_pic() {
429 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
430
431 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
432 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
433 gcc-specs-pie
434}
435
436# DEPRECATED - use gcc-specs-pie from toolchain-funcs
437# indicate whether PIE is set
438has_pie() {
439 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
440
441 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
442 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
443 gcc-specs-pie
444}
445
446# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
447# indicate whether code for SSP is being generated for all functions
448has_ssp_all() {
449 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
450
451 # note; this matches only -fstack-protector-all
452 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
453 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
454 gcc-specs-ssp-all
455}
456
457# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
458# indicate whether code for SSP is being generated
459has_ssp() {
460 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
461
462 # note; this matches both -fstack-protector and -fstack-protector-all
463 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
464 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
465 gcc-specs-ssp
466}
467
468has_m64() {
469 # this doesnt test if the flag is accepted, it tests if the flag
470 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
471 # please dont replace this function with test_flag in some future
472 # clean-up!
473
474 local temp="$(emktemp)"
475 echo "int main() { return(0); }" > "${temp}".c
476 MY_CC=$(tc-getCC)
477 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
478 local ret=$?
479 rm -f "${temp}".c
480 [[ ${ret} != 1 ]] && return 0
481 return 1
482}
483
484has_m32() {
485 # this doesnt test if the flag is accepted, it tests if the flag
486 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
487 # please dont replace this function with test_flag in some future
488 # clean-up!
489
490 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
491
492 local temp=$(emktemp)
493 echo "int main() { return(0); }" > "${temp}".c
494 MY_CC=$(tc-getCC)
495 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
496 local ret=$?
497 rm -f "${temp}".c
498 [[ ${ret} != 1 ]] && return 0
499 return 1
500}
501
264replace-sparc64-flags() { 502replace-sparc64-flags() {
265 local SPARC64_CPUS="ultrasparc v9" 503 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
266 504
267 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 505 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
268 then
269 for x in ${SPARC64_CPUS} 506 for x in ${SPARC64_CPUS}; do
270 do
271 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 507 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
272 done 508 done
273 else 509 else
274 for x in ${SPARC64_CPUS} 510 for x in ${SPARC64_CPUS}; do
275 do
276 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 511 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
277 done 512 done
278 fi 513 fi
279 514
280 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 515 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
281 then
282 for x in ${SPARC64_CPUS} 516 for x in ${SPARC64_CPUS}; do
283 do
284 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 517 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
285 done 518 done
286 else 519 else
287 for x in ${SPARC64_CPUS} 520 for x in ${SPARC64_CPUS}; do
288 do
289 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 521 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
290 done 522 done
291 fi 523 fi
524
525 export CFLAGS CXXFLAGS
292} 526}
293 527
294append-ldflags() { 528append-ldflags() {
529 [[ -z $* ]] && return 0
295 LDFLAGS="${LDFLAGS} $@" 530 export LDFLAGS="${LDFLAGS} $*"
296 return 0 531 return 0
297} 532}
298 533
299etexec-flags() { 534# Remove flags from LDFLAGS - it's up to the ebuild to filter
300 has_version sys-devel/hardened-gcc 535# CFLAGS and CXXFLAGS via filter-flags if they need to.
301 if [ $? == 0 ] ; then 536filter-ldflags() {
302 if [ "`is-flag -yet_exec`" != "true" ]; then 537 _filter-var LDFLAGS "$@"
303 debug-print ">>> appending flags -yet_exec" 538 return 0
304 append-flags -yet_exec
305 append-ldflags -yet_exec
306 fi
307 fi
308} 539}
309 540
310fstack-flags() { 541# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
311 has_version sys-devel/hardened-gcc 542# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
312 if [ $? == 0 ] ; then 543# to gcc where it needs the '-Wl,'.
313 if [ "`is-flag -yno_propolice`" != "true" ]; then 544raw-ldflags() {
314 debug-print ">>> appending flags -yno_propolice" 545 local x input="$@"
315 append-flags -yno_propolice 546 [[ -z ${input} ]] && input=${LDFLAGS}
316 append-ldflags -yno_propolice 547 set --
317 fi 548 for x in ${input} ; do
318 fi 549 x=${x#-Wl,}
550 set -- "$@" ${x//,/ }
551 done
552 echo "$@"
319} 553}
554
555# Gets the flags needed for "NOW" binding
556bindnow-flags() {
557 case $($(tc-getLD) -v 2>&1 </dev/null) in
558 *GNU* | *'with BFD'*) # GNU ld
559 echo "-Wl,-z,now" ;;
560 *Apple*) # Darwin ld
561 echo "-bind_at_load" ;;
562 *)
563 # Some linkers just recognize -V instead of -v
564 case $($(tc-getLD) -V 2>&1 </dev/null) in
565 *Solaris*) # Solaris accept almost the same GNU options
566 echo "-Wl,-z,now" ;;
567 esac
568 ;;
569 esac
570}
571
572
573# Some tests for when we screw with things and want to make
574# sure we didn't break anything
575#TESTS() {
576# CFLAGS="-a -b -c=1"
577# CXXFLAGS="-x -y -z=2"
578# LDFLAGS="-l -m -n=3"
579#
580# die() { exit 1; }
581# (is-flag 1 2 3) && die
582# (is-ldflag 1 2 3) && die
583#
584# is-flagq -l && die
585# is-ldflagq -a && die
586# is-flagq -a || die
587# is-flagq -x || die
588# is-ldflagq -n=* || die
589# is-ldflagq -n && die
590#
591# strip-unsupported-flags
592# [[ ${CFLAGS} == "-c=1" ]] || die
593# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
594#
595# echo "All tests pass"
596#}
597#TESTS

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