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1# Copyright 1999-2004 Gentoo Foundation 1# Copyright 1999-2005 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 1.67 2004/08/07 04:24:41 agriffis Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.87 2005/06/24 22:06:19 vapier Exp $
4#
5# Author Bart Verwilst <verwilst@gentoo.org>
6 4
7ECLASS=flag-o-matic 5ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS" 6INHERITED="$INHERITED $ECLASS"
9 7
10# Please leave ${IUSE} in this until portage .51 is stable, otherwise 8# need access to emktemp()
11# IUSE gets clobbered. 9inherit eutils toolchain-funcs multilib
12IUSE="${IUSE} debug"
13 10
14# 11#
15#### filter-flags <flags> #### 12#### filter-flags <flags> ####
16# Remove particular flags from C[XX]FLAGS 13# Remove particular flags from C[XX]FLAGS
17# Matches only complete flags 14# Matches only complete flags
20# Add extra flags to your current C[XX]FLAGS 17# Add extra flags to your current C[XX]FLAGS
21# 18#
22#### replace-flags <orig.flag> <new.flag> ### 19#### replace-flags <orig.flag> <new.flag> ###
23# Replace a flag by another one 20# Replace a flag by another one
24# 21#
25#### replace-cpu-flags <new.cpu> <old.cpus> ### 22#### replace-cpu-flags <old.cpus> <new.cpu> ###
26# Replace march/mcpu flags that specify <old.cpus> 23# Replace march/mcpu flags that specify <old.cpus>
27# with flags that specify <new.cpu> 24# with flags that specify <new.cpu>
28# 25#
29#### is-flag <flag> #### 26#### is-flag <flag> ####
30# Returns "true" if flag is set in C[XX]FLAGS 27# Returns "true" if flag is set in C[XX]FLAGS
54# Add extra flags to your current LDFLAGS 51# Add extra flags to your current LDFLAGS
55# 52#
56#### filter-ldflags <flags> #### 53#### filter-ldflags <flags> ####
57# Remove particular flags from LDFLAGS 54# Remove particular flags from LDFLAGS
58# Matches only complete flags 55# Matches only complete flags
59#
60#### etexec-flags ####
61# hooked function for hardened gcc that appends
62# -fno-pic to {C,CXX,LD}FLAGS
63# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
64# 56#
65#### fstack-flags #### 57#### fstack-flags ####
66# hooked function for hardened gcc that appends 58# hooked function for hardened gcc that appends
67# -fno-stack-protector to {C,CXX,LD}FLAGS 59# -fno-stack-protector to {C,CXX,LD}FLAGS
68# when a package is filtering -fstack-protector, -fstack-protector-all 60# when a package is filtering -fstack-protector, -fstack-protector-all
69# notice: modern automatic specs files will also suppress -fstack-protector-all 61# notice: modern automatic specs files will also suppress -fstack-protector-all
70# when only -fno-stack-protector is given 62# when only -fno-stack-protector is given
71# 63#
64#### has_pic ####
65# Returns true if the compiler by default or with current CFLAGS
66# builds position-independent code.
67#
68#### has_ssp_all ####
69# Returns true if the compiler by default or with current CFLAGS
70# generates stack smash protections for all functions
71#
72#### has_ssp ####
73# Returns true if the compiler by default or with current CFLAGS
74# generates stack smash protections for most vulnerable functions
75#
72 76
73# C[XX]FLAGS that we allow in strip-flags 77# C[XX]FLAGS that we allow in strip-flags
74setup-allowed-flags() { 78setup-allowed-flags() {
75 if [ -z "${ALLOWED_FLAGS}" ] ; then 79 if [[ -z ${ALLOWED_FLAGS} ]] ; then
76 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 80 export ALLOWED_FLAGS="-pipe"
77 case "${ARCH}" in 81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
78 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 82 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
79 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 83 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
80 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 84 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
81 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 85 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
82 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
83 esac
84 fi 86 fi
85 # allow a bunch of flags that negate features / control ABI 87 # allow a bunch of flags that negate features / control ABI
86 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 88 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
87 case "${ARCH}" in 89 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
88 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;; 90 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
89 esac 91 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
90 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias" 92 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
93 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
94 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
95 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
91 96
92 # C[XX]FLAGS that we are think is ok, but needs testing 97 # C[XX]FLAGS that we are think is ok, but needs testing
93 # NOTE: currently -Os have issues with gcc3 and K6* arch's 98 # NOTE: currently -Os have issues with gcc3 and K6* arch's
94 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 99 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
95 return 0 100 return 0
96} 101}
97 102
98filter-flags() { 103filter-flags() {
99 local x f fset 104 local x f fset
100 declare -a new_CFLAGS new_CXXFLAGS 105 declare -a new_CFLAGS new_CXXFLAGS
101 106
102 for x in "$@" ; do 107 for x in "$@" ; do
103 case "${x}" in 108 case "${x}" in
104 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 109 -fPIC|-fpic|-fPIE|-fpie|-pie)
110 append-flags `test_flag -fno-pie`;;
105 -fstack-protector|-fstack-protector-all) fstack-flags;; 111 -fstack-protector|-fstack-protector-all)
112 fstack-flags;;
106 esac 113 esac
107 done 114 done
108 115
109 for fset in CFLAGS CXXFLAGS; do 116 for fset in CFLAGS CXXFLAGS; do
110 # Looping over the flags instead of using a global 117 # Looping over the flags instead of using a global
131append-lfs-flags() { 138append-lfs-flags() {
132 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 139 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
133} 140}
134 141
135append-flags() { 142append-flags() {
143 [[ -z $* ]] && return 0
136 export CFLAGS="${CFLAGS} $*" 144 export CFLAGS="${CFLAGS} $*"
137 export CXXFLAGS="${CXXFLAGS} $*" 145 export CXXFLAGS="${CXXFLAGS} $*"
138 [ -n "`is-flag -fno-stack-protector`" -o \ 146 [ -n "`is-flag -fno-stack-protector`" -o \
139 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 147 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
140 return 0 148 return 0
141} 149}
142 150
143replace-flags() { 151replace-flags() {
144 local f fset 152 local f fset
145 declare -a new_CFLAGS new_CXXFLAGS 153 declare -a new_CFLAGS new_CXXFLAGS
146 154
147 for fset in CFLAGS CXXFLAGS; do 155 for fset in CFLAGS CXXFLAGS; do
148 # Looping over the flags instead of using a global 156 # Looping over the flags instead of using a global
149 # substitution ensures that we're working with flag atoms. 157 # substitution ensures that we're working with flag atoms.
159 167
160 return 0 168 return 0
161} 169}
162 170
163replace-cpu-flags() { 171replace-cpu-flags() {
164 local oldcpu newcpu="$1" ; shift 172 local newcpu="$#" ; newcpu="${!newcpu}"
165 for oldcpu in "$@" ; do 173 while [ $# -gt 1 ] ; do
166 # quote to make sure that no globbing is done (particularly on 174 # quote to make sure that no globbing is done (particularly on
167 # ${oldcpu} prior to calling replace-flags 175 # ${oldcpu} prior to calling replace-flags
168 replace-flags "-march=${oldcpu}" "-march=${newcpu}" 176 replace-flags "-march=${1}" "-march=${newcpu}"
169 replace-flags "-mcpu=${oldcpu}" "-mcpu=${newcpu}" 177 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
170 replace-flags "-mtune=${oldcpu}" "-mtune=${newcpu}" 178 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
179 shift
171 done 180 done
172 return 0 181 return 0
173} 182}
174 183
175is-flag() { 184is-flag() {
218 227
219 local NEW_CFLAGS="" 228 local NEW_CFLAGS=""
220 local NEW_CXXFLAGS="" 229 local NEW_CXXFLAGS=""
221 230
222 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 231 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
223 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 232 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
224 use debug && einfo "Enabling the use of some unstable flags"
225 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 233 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
226 fi 234 fi
227 235
228 set -f # disable pathname expansion 236 set -f # disable pathname expansion
229 237
261 export CXXFLAGS="${NEW_CXXFLAGS}" 269 export CXXFLAGS="${NEW_CXXFLAGS}"
262 return 0 270 return 0
263} 271}
264 272
265test_flag() { 273test_flag() {
266 local cc=${CC:-gcc} ; cc=${cc%% *} 274 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
267 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
268 printf "%s\n" "$*" 275 printf "%s\n" "$*"
269 return 0 276 return 0
270 fi 277 fi
271 return 1 278 return 1
272} 279}
273 280
274test_version_info() { 281test_version_info() {
275 local cc=${CC:-gcc} ; cc=${cc%% *}
276 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 282 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
277 return 0 283 return 0
278 else 284 else
279 return 1 285 return 1
280 fi 286 fi
281} 287}
310 done 316 done
311 return 1 317 return 1
312} 318}
313 319
314has_hardened() { 320has_hardened() {
315 test_version_info Hardened 321 test_version_info Hardened && return 0
322 # the specs file wont exist unless gcc has GCC_SPECS support
323 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
324 return 0
316 return $? 325 return 1
317} 326}
318 327
328# indicate whether PIC is set
319has_pic() { 329has_pic() {
320 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 330 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
321 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 331 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
322 test_version_info pie && return 0 332 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
323 return 1 333 return 1
324} 334}
325 335
336# indicate whether PIE is set
326has_pie() { 337has_pie() {
327 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 338 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
328 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 339 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
329 test_version_info pie && return 0 340 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
341 # test PIC while waiting for specs to be updated to generate __PIE__
342 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
330 return 1 343 return 1
331} 344}
332 345
346# indicate whether code for SSP is being generated for all functions
347has_ssp_all() {
348 # note; this matches only -fstack-protector-all
349 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0
350 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0
351 return 1
352}
353
354# indicate whether code for SSP is being generated
333has_ssp() { 355has_ssp() {
356 # note; this matches both -fstack-protector and -fstack-protector-all
334 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 357 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
335 test_version_info ssp && return 0 358 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
336 return 1 359 return 1
337} 360}
338 361
339has_m64() { 362has_m64() {
340 # this doesnt test if the flag is accepted, it tests if the flag 363 # this doesnt test if the flag is accepted, it tests if the flag
341 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 364 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
342 # please dont replace this function with test_flag in some future 365 # please dont replace this function with test_flag in some future
343 # clean-up! 366 # clean-up!
344 temp=`mktemp` 367 local temp="$(emktemp)"
345 echo "int main() { return(0); }" > ${temp}.c 368 echo "int main() { return(0); }" > ${temp}.c
346 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 369 MY_CC=$(tc-getCC)
347 ret=$? 370 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
371 local ret=$?
348 rm -f ${temp}.c 372 rm -f ${temp}.c
349 [ "$ret" != "1" ] && return 0 373 [ "$ret" != "1" ] && return 0
350 return 1 374 return 1
351} 375}
352 376
353has_m32() { 377has_m32() {
354 # this doesnt test if the flag is accepted, it tests if the flag 378 # this doesnt test if the flag is accepted, it tests if the flag
355 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 379 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
356 # please dont replace this function with test_flag in some future 380 # please dont replace this function with test_flag in some future
357 # clean-up! 381 # clean-up!
358 temp=`mktemp` 382
383 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
384
385 local temp="$(emktemp)"
359 echo "int main() { return(0); }" > ${temp}.c 386 echo "int main() { return(0); }" > ${temp}.c
360 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 387 MY_CC=$(tc-getCC)
361 ret=$? 388 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
389 local ret=$?
362 rm -f ${temp}.c 390 rm -f ${temp}.c
363 [ "$ret" != "1" ] && return 0 391 [ "$ret" != "1" ] && return 0
364 return 1 392 return 1
365} 393}
366 394
367replace-sparc64-flags() { 395replace-sparc64-flags() {
368 local SPARC64_CPUS="ultrasparc v9" 396 local SPARC64_CPUS="ultrasparc v9"
369 397
370 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 398 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
371 for x in ${SPARC64_CPUS}; do 399 for x in ${SPARC64_CPUS}; do
372 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 400 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
373 done 401 done
374 else 402 else
375 for x in ${SPARC64_CPUS}; do 403 for x in ${SPARC64_CPUS}; do
376 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 404 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
377 done 405 done
378 fi 406 fi
379 407
380 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 408 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
381 for x in ${SPARC64_CPUS}; do 409 for x in ${SPARC64_CPUS}; do
382 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 410 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
383 done 411 done
384 else 412 else
385 for x in ${SPARC64_CPUS}; do 413 for x in ${SPARC64_CPUS}; do
400 428
401 # we do this fancy spacing stuff so as to not filter 429 # we do this fancy spacing stuff so as to not filter
402 # out part of a flag ... we want flag atoms ! :D 430 # out part of a flag ... we want flag atoms ! :D
403 LDFLAGS=" ${LDFLAGS} " 431 LDFLAGS=" ${LDFLAGS} "
404 for x in "$@" ; do 432 for x in "$@" ; do
405 LDFLAGS="${LDFLAGS// ${x} / }" 433 LDFLAGS=${LDFLAGS// ${x} / }
406 done 434 done
435 [[ -z ${LDFLAGS// } ]] \
436 && LDFLAGS="" \
407 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 437 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
408 export LDFLAGS 438 export LDFLAGS
409 return 0
410}
411
412etexec-flags() {
413 # if you're not using a hardened compiler you wont need this
414 # PIC/no-pic kludge in the first place.
415 has_hardened || return 0
416 # this kludge breaks on amd64, and probably other -fPIC dependant
417 # archs.
418 use amd64 && return 0
419
420 if has_pie || has_pic; then
421 [ -z "`is-flag -fno-pic`" ] &&
422 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
423 [ -z "`is-flag -nopie`" ] &&
424 export CFLAGS="${CFLAGS} `test_flag -nopie`"
425 fi
426 return 0 439 return 0
427} 440}
428 441
429fstack-flags() { 442fstack-flags() {
430 if has_ssp; then 443 if has_ssp; then
431 [ -z "`is-flag -fno-stack-protector`" ] && 444 [ -z "`is-flag -fno-stack-protector`" ] &&
432 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 445 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
433 fi 446 fi
434 return 0 447 return 0
435} 448}
449
450# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
451# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
452# fixes.
453#
454# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
455gcc2-flags() {
456 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
457 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
458 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
459 fi
460
461 replace-cpu-flags k6-{2,3} k6
462 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
463
464 replace-cpu-flags pentium-mmx i586
465 replace-cpu-flags pentium{2,3,4} i686
466
467 replace-cpu-flags ev6{7,8} ev6
468
469 export CFLAGS CXXFLAGS
470}

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