/[gentoo-x86]/eclass/flag-o-matic.eclass
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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 1.65 2004/07/27 19:25:49 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.90 2005/07/11 19:28:20 agriffis Exp $
4#
5# Author Bart Verwilst <verwilst@gentoo.org>
6 4
7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS"
9 5
10# Please leave ${IUSE} in this until portage .51 is stable, otherwise 6# need access to emktemp()
11# IUSE gets clobbered. 7inherit eutils toolchain-funcs multilib
12IUSE="${IUSE} debug"
13 8
14# 9#
15#### filter-flags <flags> #### 10#### filter-flags <flags> ####
16# Remove particular flags from C[XX]FLAGS 11# Remove particular flags from C[XX]FLAGS
17# Matches only complete flags 12# Matches only complete flags
20# Add extra flags to your current C[XX]FLAGS 15# Add extra flags to your current C[XX]FLAGS
21# 16#
22#### replace-flags <orig.flag> <new.flag> ### 17#### replace-flags <orig.flag> <new.flag> ###
23# Replace a flag by another one 18# Replace a flag by another one
24# 19#
25#### replace-cpu-flags <new.cpu> <old.cpus> ### 20#### replace-cpu-flags <old.cpus> <new.cpu> ###
26# Replace march/mcpu flags that specify <old.cpus> 21# Replace march/mcpu flags that specify <old.cpus>
27# with flags that specify <new.cpu> 22# with flags that specify <new.cpu>
28# 23#
29#### is-flag <flag> #### 24#### is-flag <flag> ####
30# Returns "true" if flag is set in C[XX]FLAGS 25# Returns "true" if flag is set in C[XX]FLAGS
54# Add extra flags to your current LDFLAGS 49# Add extra flags to your current LDFLAGS
55# 50#
56#### filter-ldflags <flags> #### 51#### filter-ldflags <flags> ####
57# Remove particular flags from LDFLAGS 52# Remove particular flags from LDFLAGS
58# Matches only complete flags 53# 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# 54#
65#### fstack-flags #### 55#### fstack-flags ####
66# hooked function for hardened gcc that appends 56# hooked function for hardened gcc that appends
67# -fno-stack-protector to {C,CXX,LD}FLAGS 57# -fno-stack-protector to {C,CXX,LD}FLAGS
68# when a package is filtering -fstack-protector, -fstack-protector-all 58# when a package is filtering -fstack-protector, -fstack-protector-all
69# notice: modern automatic specs files will also suppress -fstack-protector-all 59# notice: modern automatic specs files will also suppress -fstack-protector-all
70# when only -fno-stack-protector is given 60# when only -fno-stack-protector is given
71# 61#
62#### has_pic ####
63# Returns true if the compiler by default or with current CFLAGS
64# builds position-independent code.
65#
66#### has_ssp_all ####
67# Returns true if the compiler by default or with current CFLAGS
68# generates stack smash protections for all functions
69#
70#### has_ssp ####
71# Returns true if the compiler by default or with current CFLAGS
72# generates stack smash protections for most vulnerable functions
73#
72 74
73# C[XX]FLAGS that we allow in strip-flags 75# C[XX]FLAGS that we allow in strip-flags
74setup-allowed-flags() { 76setup-allowed-flags() {
75 if [ -z "${ALLOWED_FLAGS}" ] ; then 77 if [[ -z ${ALLOWED_FLAGS} ]] ; then
76 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 78 export ALLOWED_FLAGS="-pipe"
77 case "${ARCH}" in 79 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
78 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
79 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
80 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 82 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
81 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 83 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 84 fi
85 # allow a bunch of flags that negate features / control ABI 85 # allow a bunch of flags that negate features / control ABI
86 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 86 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
87 case "${ARCH}" in 87 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
88 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;; 88 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
89 esac 89 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
90 ALLOWED_FLAGS="${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" 90 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
91 -mieee -mieee-with-inexact \
92 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
93 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
94 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
91 95
92 # C[XX]FLAGS that we are think is ok, but needs testing 96 # C[XX]FLAGS that we are think is ok, but needs testing
93 # NOTE: currently -Os have issues with gcc3 and K6* arch's 97 # NOTE: currently -Os have issues with gcc3 and K6* arch's
94 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 98 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
95 return 0 99 return 0
96} 100}
97 101
98filter-flags() { 102filter-flags() {
99 local x f fset 103 local x f fset
100 declare -a new_CFLAGS new_CXXFLAGS 104 declare -a new_CFLAGS new_CXXFLAGS
101 105
102 for x in "$@" ; do 106 for x in "$@" ; do
103 case "${x}" in 107 case "${x}" in
104 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 108 -fPIC|-fpic|-fPIE|-fpie|-pie)
109 append-flags `test_flag -fno-pie`;;
105 -fstack-protector|-fstack-protector-all) fstack-flags;; 110 -fstack-protector|-fstack-protector-all)
111 fstack-flags;;
106 esac 112 esac
107 done 113 done
108 114
109 for fset in CFLAGS CXXFLAGS; do 115 for fset in CFLAGS CXXFLAGS; do
110 # Looping over the flags instead of using a global 116 # Looping over the flags instead of using a global
131append-lfs-flags() { 137append-lfs-flags() {
132 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 138 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
133} 139}
134 140
135append-flags() { 141append-flags() {
142 [[ -z $* ]] && return 0
136 export CFLAGS="${CFLAGS} $*" 143 export CFLAGS="${CFLAGS} $*"
137 export CXXFLAGS="${CXXFLAGS} $*" 144 export CXXFLAGS="${CXXFLAGS} $*"
138 [ -n "`is-flag -fno-stack-protector`" -o \ 145 [ -n "`is-flag -fno-stack-protector`" -o \
139 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 146 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
140 return 0 147 return 0
141} 148}
142 149
143replace-flags() { 150replace-flags() {
144 local f fset 151 local f fset
145 declare -a new_CFLAGS new_CXXFLAGS 152 declare -a new_CFLAGS new_CXXFLAGS
146 153
147 for fset in CFLAGS CXXFLAGS; do 154 for fset in CFLAGS CXXFLAGS; do
148 # Looping over the flags instead of using a global 155 # Looping over the flags instead of using a global
149 # substitution ensures that we're working with flag atoms. 156 # substitution ensures that we're working with flag atoms.
159 166
160 return 0 167 return 0
161} 168}
162 169
163replace-cpu-flags() { 170replace-cpu-flags() {
164 local oldcpu newcpu="$1" ; shift 171 local newcpu="$#" ; newcpu="${!newcpu}"
165 for oldcpu in "$@" ; do 172 while [ $# -gt 1 ] ; do
166 # quote to make sure that no globbing is done (particularly on 173 # quote to make sure that no globbing is done (particularly on
167 # ${oldcpu} prior to calling replace-flags 174 # ${oldcpu} prior to calling replace-flags
168 replace-flags "-march=${oldcpu}" "-march=${newcpu}" 175 replace-flags "-march=${1}" "-march=${newcpu}"
169 replace-flags "-mcpu=${oldcpu}" "-mcpu=${newcpu}" 176 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
170 replace-flags "-mtune=${oldcpu}" "-mtune=${newcpu}" 177 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
178 shift
171 done 179 done
172 return 0 180 return 0
173} 181}
174 182
175is-flag() { 183is-flag() {
176 local x 184 local x
177 185
178 for x in ${CFLAGS} ${CXXFLAGS} ; do 186 for x in ${CFLAGS} ${CXXFLAGS} ; do
187 # Note this should work with globs like -mcpu=ultrasparc*
179 if [ "${x}" == "$1" ] ; then 188 if [[ ${x} == ${1} ]]; then
180 echo true 189 echo true
181 return 0 190 return 0
182 fi 191 fi
183 done 192 done
184 return 1 193 return 1
217 226
218 local NEW_CFLAGS="" 227 local NEW_CFLAGS=""
219 local NEW_CXXFLAGS="" 228 local NEW_CXXFLAGS=""
220 229
221 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 230 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
222 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 231 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
223 use debug && einfo "Enabling the use of some unstable flags"
224 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 232 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
225 fi 233 fi
226 234
227 set -f # disable pathname expansion 235 set -f # disable pathname expansion
228 236
260 export CXXFLAGS="${NEW_CXXFLAGS}" 268 export CXXFLAGS="${NEW_CXXFLAGS}"
261 return 0 269 return 0
262} 270}
263 271
264test_flag() { 272test_flag() {
265 local cc=${CC:-gcc} ; cc=${cc%% *} 273 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
266 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
267 printf "%s\n" "$*" 274 printf "%s\n" "$*"
268 return 0 275 return 0
269 fi 276 fi
270 return 1 277 return 1
271} 278}
272 279
273test_version_info() { 280test_version_info() {
274 local cc=${CC:-gcc} ; cc=${cc%% *}
275 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 281 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
276 return 0 282 return 0
277 else 283 else
278 return 1 284 return 1
279 fi 285 fi
280} 286}
309 done 315 done
310 return 1 316 return 1
311} 317}
312 318
313has_hardened() { 319has_hardened() {
314 test_version_info Hardened 320 test_version_info Hardened && return 0
321 # the specs file wont exist unless gcc has GCC_SPECS support
322 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
323 return 0
315 return $? 324 return 1
316} 325}
317 326
327# indicate whether PIC is set
318has_pic() { 328has_pic() {
319 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 329 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
320 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 330 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
321 test_version_info pie && return 0 331 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
322 return 1 332 return 1
323} 333}
324 334
335# indicate whether PIE is set
325has_pie() { 336has_pie() {
326 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 337 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
327 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 338 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
328 test_version_info pie && return 0 339 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
340 # test PIC while waiting for specs to be updated to generate __PIE__
341 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
329 return 1 342 return 1
330} 343}
331 344
345# indicate whether code for SSP is being generated for all functions
346has_ssp_all() {
347 # note; this matches only -fstack-protector-all
348 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0
349 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0
350 return 1
351}
352
353# indicate whether code for SSP is being generated
332has_ssp() { 354has_ssp() {
355 # note; this matches both -fstack-protector and -fstack-protector-all
333 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 356 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
334 test_version_info ssp && return 0 357 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
335 return 1 358 return 1
336} 359}
337 360
338has_m64() { 361has_m64() {
339 # this doesnt test if the flag is accepted, it tests if the flag 362 # this doesnt test if the flag is accepted, it tests if the flag
340 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 363 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
341 # please dont replace this function with test_flag in some future 364 # please dont replace this function with test_flag in some future
342 # clean-up! 365 # clean-up!
343 temp=`mktemp` 366 local temp="$(emktemp)"
344 echo "int main() { return(0); }" > ${temp}.c 367 echo "int main() { return(0); }" > ${temp}.c
345 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 368 MY_CC=$(tc-getCC)
346 ret=$? 369 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
370 local ret=$?
347 rm -f ${temp}.c 371 rm -f ${temp}.c
348 [ "$ret" != "1" ] && return 0 372 [ "$ret" != "1" ] && return 0
349 return 1 373 return 1
350} 374}
351 375
352has_m32() { 376has_m32() {
353 # this doesnt test if the flag is accepted, it tests if the flag 377 # this doesnt test if the flag is accepted, it tests if the flag
354 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 378 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
355 # please dont replace this function with test_flag in some future 379 # please dont replace this function with test_flag in some future
356 # clean-up! 380 # clean-up!
357 temp=`mktemp` 381
382 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
383
384 local temp="$(emktemp)"
358 echo "int main() { return(0); }" > ${temp}.c 385 echo "int main() { return(0); }" > ${temp}.c
359 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 386 MY_CC=$(tc-getCC)
360 ret=$? 387 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
388 local ret=$?
361 rm -f ${temp}.c 389 rm -f ${temp}.c
362 [ "$ret" != "1" ] && return 0 390 [ "$ret" != "1" ] && return 0
363 return 1 391 return 1
364} 392}
365 393
366replace-sparc64-flags() { 394replace-sparc64-flags() {
367 local SPARC64_CPUS="ultrasparc v9" 395 local SPARC64_CPUS="ultrasparc v9"
368 396
369 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 397 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
370 for x in ${SPARC64_CPUS}; do 398 for x in ${SPARC64_CPUS}; do
371 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 399 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
372 done 400 done
373 else 401 else
374 for x in ${SPARC64_CPUS}; do 402 for x in ${SPARC64_CPUS}; do
375 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 403 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
376 done 404 done
377 fi 405 fi
378 406
379 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 407 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
380 for x in ${SPARC64_CPUS}; do 408 for x in ${SPARC64_CPUS}; do
381 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 409 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
382 done 410 done
383 else 411 else
384 for x in ${SPARC64_CPUS}; do 412 for x in ${SPARC64_CPUS}; do
399 427
400 # we do this fancy spacing stuff so as to not filter 428 # we do this fancy spacing stuff so as to not filter
401 # out part of a flag ... we want flag atoms ! :D 429 # out part of a flag ... we want flag atoms ! :D
402 LDFLAGS=" ${LDFLAGS} " 430 LDFLAGS=" ${LDFLAGS} "
403 for x in "$@" ; do 431 for x in "$@" ; do
404 LDFLAGS="${LDFLAGS// ${x} / }" 432 LDFLAGS=${LDFLAGS// ${x} / }
405 done 433 done
434 [[ -z ${LDFLAGS// } ]] \
435 && LDFLAGS="" \
406 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 436 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
407 export LDFLAGS 437 export LDFLAGS
408 return 0
409}
410
411etexec-flags() {
412 # if you're not using a hardened compiler you wont need this
413 # PIC/no-pic kludge in the first place.
414 has_hardened || return 0
415
416 if has_pie || has_pic; then
417 [ -z "`is-flag -fno-pic`" ] &&
418 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
419 [ -z "`is-flag -nopie`" ] &&
420 export CFLAGS="${CFLAGS} `test_flag -nopie`"
421 fi
422 return 0 438 return 0
423} 439}
424 440
425fstack-flags() { 441fstack-flags() {
426 if has_ssp; then 442 if has_ssp; then
427 [ -z "`is-flag -fno-stack-protector`" ] && 443 [ -z "`is-flag -fno-stack-protector`" ] &&
428 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 444 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
429 fi 445 fi
430 return 0 446 return 0
431} 447}
448
449# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
450# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
451# fixes.
452#
453# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
454gcc2-flags() {
455 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
456 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
457 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
458 fi
459
460 replace-cpu-flags k6-{2,3} k6
461 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
462
463 replace-cpu-flags pentium-mmx i586
464 replace-cpu-flags pentium{2,3,4} i686
465
466 replace-cpu-flags ev6{7,8} ev6
467
468 export CFLAGS CXXFLAGS
469}

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