/[gentoo-x86]/eclass/flag-o-matic.eclass
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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 1.93 2005/09/27 01:06:47 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.96 2005/12/08 12:16:12 azarah Exp $
4 4
5 5
6# need access to emktemp() 6# need access to emktemp()
7inherit eutils toolchain-funcs multilib 7inherit eutils toolchain-funcs multilib
8 8
57# -fno-stack-protector to {C,CXX,LD}FLAGS 57# -fno-stack-protector to {C,CXX,LD}FLAGS
58# when a package is filtering -fstack-protector, -fstack-protector-all 58# when a package is filtering -fstack-protector, -fstack-protector-all
59# notice: modern automatic specs files will also suppress -fstack-protector-all 59# notice: modern automatic specs files will also suppress -fstack-protector-all
60# when only -fno-stack-protector is given 60# when only -fno-stack-protector is given
61# 61#
62#### bindnow-flags ####
63# Returns the flags to enable "now" binding in the current selected linker.
62# 64#
63################ DEPRECATED functions ################ 65################ DEPRECATED functions ################
64# The following are still present to avoid breaking existing 66# The following are still present to avoid breaking existing
65# code more than necessary; however they are deprecated. Please 67# code more than necessary; however they are deprecated. Please
66# use gcc-specs-* from toolchain-funcs.eclass instead, if you 68# use gcc-specs-* from toolchain-funcs.eclass instead, if you
291 export CFLAGS="${NEW_CFLAGS}" 293 export CFLAGS="${NEW_CFLAGS}"
292 export CXXFLAGS="${NEW_CXXFLAGS}" 294 export CXXFLAGS="${NEW_CXXFLAGS}"
293 return 0 295 return 0
294} 296}
295 297
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" "$1"; }
315
316test-flags() {
317 local x
318
319 for x in "$@" ; do
320 test-flag-CC "${x}" || return 1
321 done
322
323 echo "$@"
324
325 return 0
326}
327
328# Depriciated, use test-flags()
296test_flag() { 329test_flag() {
297 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 330 ewarn "test_flag: deprecated, please use test-flags()!" >/dev/stderr
298 printf "%s\n" "$*" 331
299 return 0 332 test-flags "$@"
300 fi
301 return 1
302} 333}
303 334
304test_version_info() { 335test_version_info() {
305 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 336 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
306 return 0 337 return 0
308 return 1 339 return 1
309 fi 340 fi
310} 341}
311 342
312strip-unsupported-flags() { 343strip-unsupported-flags() {
313 local NEW_CFLAGS NEW_CXXFLAGS 344 local x NEW_CFLAGS NEW_CXXFLAGS
314 345
315 for x in ${CFLAGS} ; do 346 for x in ${CFLAGS} ; do
316 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 347 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
317 done 348 done
318 for x in ${CXXFLAGS} ; do 349 for x in ${CXXFLAGS} ; do
319 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`" 350 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
320 done 351 done
321 352
322 export CFLAGS="${NEW_CFLAGS}" 353 export CFLAGS=${NEW_CFLAGS}
323 export CXXFLAGS="${NEW_CXXFLAGS}" 354 export CXXFLAGS=${NEW_CXXFLAGS}
324} 355}
325 356
326get-flag() { 357get-flag() {
327 local f findflag="$1" 358 local f findflag="$1"
328 359
340 return 1 371 return 1
341} 372}
342 373
343# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 374# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
344has_hardened() { 375has_hardened() {
376 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" \
377 >/dev/stderr
378
345 test_version_info Hardened && return 0 379 test_version_info Hardened && return 0
346 # the specs file wont exist unless gcc has GCC_SPECS support 380 # The specs file wont exist unless gcc has GCC_SPECS support
347 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 381 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
348 return 0
349 return 1
350} 382}
351 383
352# DEPRECATED - use gcc-specs-pie from toolchain-funcs 384# DEPRECATED - use gcc-specs-pie from toolchain-funcs
353# indicate whether PIC is set 385# indicate whether PIC is set
354has_pic() { 386has_pic() {
355 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 387 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >/dev/stderr
356 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 388
389 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
390 ${CFLAGS/-fpic} != ${CFLAGS} || \
357 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0 391 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
358 return 1
359} 392}
360 393
361# DEPRECATED - use gcc-specs-pie from toolchain-funcs 394# DEPRECATED - use gcc-specs-pie from toolchain-funcs
362# indicate whether PIE is set 395# indicate whether PIE is set
363has_pie() { 396has_pie() {
364 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 397 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >/dev/stderr
365 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 398
399 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
400 ${CFLAGS/-fpie} != ${CFLAGS} || \
401 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__) || \
366 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0 402 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
367 # test PIC while waiting for specs to be updated to generate __PIE__ 403 # test PIC while waiting for specs to be updated to generate __PIE__
368 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
369 return 1
370} 404}
371 405
372# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 406# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
373# indicate whether code for SSP is being generated for all functions 407# indicate whether code for SSP is being generated for all functions
374has_ssp_all() { 408has_ssp_all() {
409 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >/dev/stderr
410
375 # note; this matches only -fstack-protector-all 411 # note; this matches only -fstack-protector-all
376 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0 412 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
377 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0 413 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
378 gcc-specs-ssp && return 0 414 gcc-specs-ssp
379 return 1
380} 415}
381 416
382# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 417# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
383# indicate whether code for SSP is being generated 418# indicate whether code for SSP is being generated
384has_ssp() { 419has_ssp() {
420 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >/dev/stderr
421
385 # note; this matches both -fstack-protector and -fstack-protector-all 422 # note; this matches both -fstack-protector and -fstack-protector-all
386 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 423 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
387 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0 424 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
388 gcc-specs-ssp && return 0 425 gcc-specs-ssp
389 return 1
390} 426}
391 427
392has_m64() { 428has_m64() {
393 # this doesnt test if the flag is accepted, it tests if the flag 429 # this doesnt test if the flag is accepted, it tests if the flag
394 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 430 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
395 # please dont replace this function with test_flag in some future 431 # please dont replace this function with test_flag in some future
396 # clean-up! 432 # clean-up!
433
397 local temp="$(emktemp)" 434 local temp="$(emktemp)"
398 echo "int main() { return(0); }" > ${temp}.c 435 echo "int main() { return(0); }" > "${temp}".c
399 MY_CC=$(tc-getCC) 436 MY_CC=$(tc-getCC)
400 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 437 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
401 local ret=$? 438 local ret=$?
402 rm -f ${temp}.c 439 rm -f "${temp}".c
403 [ "$ret" != "1" ] && return 0 440 [[ ${ret} != 1 ]] && return 0
404 return 1 441 return 1
405} 442}
406 443
407has_m32() { 444has_m32() {
408 # this doesnt test if the flag is accepted, it tests if the flag 445 # this doesnt test if the flag is accepted, it tests if the flag
410 # please dont replace this function with test_flag in some future 447 # please dont replace this function with test_flag in some future
411 # clean-up! 448 # clean-up!
412 449
413 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0 450 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
414 451
415 local temp="$(emktemp)" 452 local temp=$(emktemp)
416 echo "int main() { return(0); }" > ${temp}.c 453 echo "int main() { return(0); }" > "${temp}".c
417 MY_CC=$(tc-getCC) 454 MY_CC=$(tc-getCC)
418 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 455 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
419 local ret=$? 456 local ret=$?
420 rm -f ${temp}.c 457 rm -f "${temp}".c
421 [ "$ret" != "1" ] && return 0 458 [[ ${ret} != 1 ]] && return 0
422 return 1 459 return 1
423} 460}
424 461
425replace-sparc64-flags() { 462replace-sparc64-flags() {
426 local SPARC64_CPUS="ultrasparc v9" 463 local SPARC64_CPUS="ultrasparc v9"
496 533
497 replace-cpu-flags ev6{7,8} ev6 534 replace-cpu-flags ev6{7,8} ev6
498 535
499 export CFLAGS CXXFLAGS 536 export CFLAGS CXXFLAGS
500} 537}
538
539# Gets the flags needed for "NOW" binding
540bindnow-flags() {
541 case $($(tc-getLD) -v 2>&1 </dev/null) in
542 *GNU* | *'with BFD'*) # GNU ld
543 echo "-Wl,-z,now" ;;
544 *Apple*) # Darwin ld
545 echo "-bind_at_load" ;;
546 *)
547 # Some linkers just recognize -V instead of -v
548 case $($(tc-getLD) -V 2>&1 </dev/null) in
549 *Solaris*) # Solaris accept almost the same GNU options
550 echo "-Wl,-z,now" ;;
551 esac
552 ;;
553 esac
554}

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