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1# Copyright 1999-2005 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 1.86 2005/04/28 20:06:00 solar Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.101 2006/01/01 01:14:59 swegener Exp $
4 4
5ECLASS=flag-o-matic
6INHERITED="$INHERITED $ECLASS"
7
8IUSE="debug"
9 5
10# need access to emktemp() 6# need access to emktemp()
11inherit eutils toolchain-funcs multilib 7inherit eutils toolchain-funcs multilib
12 8
13# 9#
61# -fno-stack-protector to {C,CXX,LD}FLAGS 57# -fno-stack-protector to {C,CXX,LD}FLAGS
62# when a package is filtering -fstack-protector, -fstack-protector-all 58# when a package is filtering -fstack-protector, -fstack-protector-all
63# notice: modern automatic specs files will also suppress -fstack-protector-all 59# notice: modern automatic specs files will also suppress -fstack-protector-all
64# when only -fno-stack-protector is given 60# when only -fno-stack-protector is given
65# 61#
62#### bindnow-flags ####
63# Returns the flags to enable "now" binding in the current selected linker.
64#
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#
66#### has_pic #### 81#### has_pic ####
67# Returns true if the compiler by default or with current CFLAGS 82# Returns true if the compiler by default or with current CFLAGS
68# builds position-independent code. 83# builds position-independent code.
69# 84#
70#### has_ssp_all #### 85#### has_ssp_all ####
79# C[XX]FLAGS that we allow in strip-flags 94# C[XX]FLAGS that we allow in strip-flags
80setup-allowed-flags() { 95setup-allowed-flags() {
81 if [[ -z ${ALLOWED_FLAGS} ]] ; then 96 if [[ -z ${ALLOWED_FLAGS} ]] ; then
82 export ALLOWED_FLAGS="-pipe" 97 export ALLOWED_FLAGS="-pipe"
83 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
84 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector" 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
85 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
86 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
87 case $(tc-arch) in
88 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
89 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
90 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
91 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
92 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
93 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;;
94 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;;
95 esac
96 fi 103 fi
97 # allow a bunch of flags that negate features / control ABI 104 # allow a bunch of flags that negate features / control ABI
98 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
99 case $(tc-arch) in 106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
100 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;; 107 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
101 esac 108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
102 ALLOWED_FLAGS="${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" 109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
103 115
104 # C[XX]FLAGS that we are think is ok, but needs testing 116 # C[XX]FLAGS that we are think is ok, but needs testing
105 # NOTE: currently -Os have issues with gcc3 and K6* arch's 117 # NOTE: currently -Os have issues with gcc3 and K6* arch's
106 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
107 return 0 119 return 0
137 149
138 return 0 150 return 0
139} 151}
140 152
141filter-lfs-flags() { 153filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
142 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 155 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
143} 156}
144 157
145append-lfs-flags() { 158append-lfs-flags() {
159 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
146 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 160 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
147} 161}
148 162
149append-flags() { 163append-flags() {
150 [[ -z $* ]] && return 0 164 [[ -z $* ]] && return 0
154 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 168 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
155 return 0 169 return 0
156} 170}
157 171
158replace-flags() { 172replace-flags() {
173 [[ $# != 2 ]] \
174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
175 && die "replace-flags takes 2 arguments, not $#"
176
159 local f fset 177 local f fset
160 declare -a new_CFLAGS new_CXXFLAGS 178 declare -a new_CFLAGS new_CXXFLAGS
161 179
162 for fset in CFLAGS CXXFLAGS; do 180 for fset in CFLAGS CXXFLAGS; do
163 # Looping over the flags instead of using a global 181 # Looping over the flags instead of using a global
235 local NEW_CFLAGS="" 253 local NEW_CFLAGS=""
236 local NEW_CXXFLAGS="" 254 local NEW_CXXFLAGS=""
237 255
238 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 256 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
239 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 257 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
240 use debug && einfo "Enabling the use of some unstable flags"
241 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 258 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
242 fi 259 fi
243 260
244 set -f # disable pathname expansion 261 set -f # disable pathname expansion
245 262
276 export CFLAGS="${NEW_CFLAGS}" 293 export CFLAGS="${NEW_CFLAGS}"
277 export CXXFLAGS="${NEW_CXXFLAGS}" 294 export CXXFLAGS="${NEW_CXXFLAGS}"
278 return 0 295 return 0
279} 296}
280 297
298test-flag-PROG() {
299 local comp=$1
300 local flags="$2"
301
302 [[ -z ${comp} || -z ${flags} ]] && \
303 return 1
304
305 local PROG=$(tc-get${comp})
306 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
307 > /dev/null 2>&1
308}
309
310# Returns true if C compiler support given flag
311test-flag-CC() { test-flag-PROG "CC" "$1"; }
312
313# Returns true if C++ compiler support given flag
314test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
315
316test-flags-PROG() {
317 local comp=$1
318 local flags
319 local x
320
321 shift
322
323 [[ -z ${comp} ]] && \
324 return 1
325
326 for x in "$@" ; do
327 test-flag-${comp} "${x}" && flags="${flags} ${x}"
328 done
329
330 echo "${flags}"
331
332 # Just bail if we dont have any flags
333 [[ -n ${flags} ]]
334}
335
336# Returns (echo's) the given flags supported by the C compiler
337test-flags-CC() { test-flags-PROG "CC" "$@"; }
338
339# Returns (echo's) the given flags supported by the C++ compiler
340test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
341
342# Short-hand that should hopefully work for both C and C++ compiler, but
343# its really only present due to the append-flags() abomination.
344test-flags() { test-flags-CC "$@"; }
345
346# Depriciated, use test-flags()
281test_flag() { 347test_flag() {
282 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 348 addwrite "/dev/stderr"
283 printf "%s\n" "$*" 349 ewarn "test_flag: deprecated, please use test-flags()!" >/dev/stderr
284 return 0 350
285 fi 351 test-flags-CC "$@"
286 return 1
287} 352}
288 353
289test_version_info() { 354test_version_info() {
290 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 355 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
291 return 0 356 return 0
293 return 1 358 return 1
294 fi 359 fi
295} 360}
296 361
297strip-unsupported-flags() { 362strip-unsupported-flags() {
298 local NEW_CFLAGS NEW_CXXFLAGS 363 local x NEW_CFLAGS NEW_CXXFLAGS
299 364
300 for x in ${CFLAGS} ; do 365 for x in ${CFLAGS} ; do
301 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 366 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
302 done 367 done
303 for x in ${CXXFLAGS} ; do 368 for x in ${CXXFLAGS} ; do
304 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`" 369 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
305 done 370 done
306 371
307 export CFLAGS="${NEW_CFLAGS}" 372 export CFLAGS=${NEW_CFLAGS}
308 export CXXFLAGS="${NEW_CXXFLAGS}" 373 export CXXFLAGS=${NEW_CXXFLAGS}
309} 374}
310 375
311get-flag() { 376get-flag() {
312 local f findflag="$1" 377 local f findflag="$1"
313 378
323 fi 388 fi
324 done 389 done
325 return 1 390 return 1
326} 391}
327 392
393# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
328has_hardened() { 394has_hardened() {
395 addwrite "/dev/stderr"
396 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" \
397 >/dev/stderr
398
329 test_version_info Hardened && return 0 399 test_version_info Hardened && return 0
330 # the specs file wont exist unless gcc has GCC_SPECS support 400 # The specs file wont exist unless gcc has GCC_SPECS support
331 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 401 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
332 return 0
333 return 1
334} 402}
335 403
404# DEPRECATED - use gcc-specs-pie from toolchain-funcs
336# indicate whether PIC is set 405# indicate whether PIC is set
337has_pic() { 406has_pic() {
338 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 407 addwrite "/dev/stderr"
339 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 408 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >/dev/stderr
409
410 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
411 ${CFLAGS/-fpic} != ${CFLAGS} || \
340 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0 412 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
341 return 1
342} 413}
343 414
415# DEPRECATED - use gcc-specs-pie from toolchain-funcs
344# indicate whether PIE is set 416# indicate whether PIE is set
345has_pie() { 417has_pie() {
346 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 418 addwrite "/dev/stderr"
347 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 419 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >/dev/stderr
420
421 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
422 ${CFLAGS/-fpie} != ${CFLAGS} || \
423 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__) || \
348 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0 424 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
349 # test PIC while waiting for specs to be updated to generate __PIE__ 425 # test PIC while waiting for specs to be updated to generate __PIE__
350 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
351 return 1
352} 426}
353 427
428# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
354# indicate whether code for SSP is being generated for all functions 429# indicate whether code for SSP is being generated for all functions
355has_ssp_all() { 430has_ssp_all() {
431 addwrite "/dev/stderr"
432 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >/dev/stderr
433
356 # note; this matches only -fstack-protector-all 434 # note; this matches only -fstack-protector-all
357 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0 435 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
358 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0 436 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
359 return 1 437 gcc-specs-ssp
360} 438}
361 439
440# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
362# indicate whether code for SSP is being generated 441# indicate whether code for SSP is being generated
363has_ssp() { 442has_ssp() {
443 addwrite "/dev/stderr"
444 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >/dev/stderr
445
364 # note; this matches both -fstack-protector and -fstack-protector-all 446 # note; this matches both -fstack-protector and -fstack-protector-all
365 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 447 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
366 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0 448 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
367 return 1 449 gcc-specs-ssp
368} 450}
369 451
370has_m64() { 452has_m64() {
371 # this doesnt test if the flag is accepted, it tests if the flag 453 # this doesnt test if the flag is accepted, it tests if the flag
372 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 454 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
373 # please dont replace this function with test_flag in some future 455 # please dont replace this function with test_flag in some future
374 # clean-up! 456 # clean-up!
457
375 local temp="$(emktemp)" 458 local temp="$(emktemp)"
376 echo "int main() { return(0); }" > ${temp}.c 459 echo "int main() { return(0); }" > "${temp}".c
377 MY_CC=$(tc-getCC) 460 MY_CC=$(tc-getCC)
378 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 461 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
379 local ret=$? 462 local ret=$?
380 rm -f ${temp}.c 463 rm -f "${temp}".c
381 [ "$ret" != "1" ] && return 0 464 [[ ${ret} != 1 ]] && return 0
382 return 1 465 return 1
383} 466}
384 467
385has_m32() { 468has_m32() {
386 # this doesnt test if the flag is accepted, it tests if the flag 469 # this doesnt test if the flag is accepted, it tests if the flag
388 # please dont replace this function with test_flag in some future 471 # please dont replace this function with test_flag in some future
389 # clean-up! 472 # clean-up!
390 473
391 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0 474 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
392 475
393 local temp="$(emktemp)" 476 local temp=$(emktemp)
394 echo "int main() { return(0); }" > ${temp}.c 477 echo "int main() { return(0); }" > "${temp}".c
395 MY_CC=$(tc-getCC) 478 MY_CC=$(tc-getCC)
396 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 479 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
397 local ret=$? 480 local ret=$?
398 rm -f ${temp}.c 481 rm -f "${temp}".c
399 [ "$ret" != "1" ] && return 0 482 [[ ${ret} != 1 ]] && return 0
400 return 1 483 return 1
401} 484}
402 485
403replace-sparc64-flags() { 486replace-sparc64-flags() {
404 local SPARC64_CPUS="ultrasparc v9" 487 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
405 488
406 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 489 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
407 for x in ${SPARC64_CPUS}; do 490 for x in ${SPARC64_CPUS}; do
408 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 491 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
409 done 492 done
446 export LDFLAGS 529 export LDFLAGS
447 return 0 530 return 0
448} 531}
449 532
450fstack-flags() { 533fstack-flags() {
451 if has_ssp; then 534 if gcc-specs-ssp; then
452 [ -z "`is-flag -fno-stack-protector`" ] && 535 [ -z "`is-flag -fno-stack-protector`" ] &&
453 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 536 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
454 fi 537 fi
455 return 0 538 return 0
456} 539}
474 557
475 replace-cpu-flags ev6{7,8} ev6 558 replace-cpu-flags ev6{7,8} ev6
476 559
477 export CFLAGS CXXFLAGS 560 export CFLAGS CXXFLAGS
478} 561}
562
563# Gets the flags needed for "NOW" binding
564bindnow-flags() {
565 case $($(tc-getLD) -v 2>&1 </dev/null) in
566 *GNU* | *'with BFD'*) # GNU ld
567 echo "-Wl,-z,now" ;;
568 *Apple*) # Darwin ld
569 echo "-bind_at_load" ;;
570 *)
571 # Some linkers just recognize -V instead of -v
572 case $($(tc-getLD) -V 2>&1 </dev/null) in
573 *Solaris*) # Solaris accept almost the same GNU options
574 echo "-Wl,-z,now" ;;
575 esac
576 ;;
577 esac
578}

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