/[gentoo-x86]/eclass/toolchain-funcs.eclass
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1# Copyright 1999-2007 Gentoo Foundation 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/toolchain-funcs.eclass,v 1.79 2008/09/16 06:40:21 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.85 2009/01/27 23:35:04 vapier Exp $
4 4
5# @ECLASS: toolchain-funcs.eclass 5# @ECLASS: toolchain-funcs.eclass
6# @MAINTAINER: 6# @MAINTAINER:
7# Toolchain Ninjas <toolchain@gentoo.org> 7# Toolchain Ninjas <toolchain@gentoo.org>
8# @BLURB: functions to query common info about the toolchain 8# @BLURB: functions to query common info about the toolchain
347 347
348# Returns true if gcc sets relro 348# Returns true if gcc sets relro
349gcc-specs-relro() { 349gcc-specs-relro() {
350 local directive 350 local directive
351 directive=$(gcc-specs-directive link_command) 351 directive=$(gcc-specs-directive link_command)
352 return $([[ ${directive/\{!norelro:} != ${directive} ]]) 352 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
353} 353}
354# Returns true if gcc sets now 354# Returns true if gcc sets now
355gcc-specs-now() { 355gcc-specs-now() {
356 local directive 356 local directive
357 directive=$(gcc-specs-directive link_command) 357 directive=$(gcc-specs-directive link_command)
358 return $([[ ${directive/\{!nonow:} != ${directive} ]]) 358 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
359} 359}
360# Returns true if gcc builds PIEs 360# Returns true if gcc builds PIEs
361gcc-specs-pie() { 361gcc-specs-pie() {
362 local directive 362 local directive
363 directive=$(gcc-specs-directive cc1) 363 directive=$(gcc-specs-directive cc1)
364 return $([[ ${directive/\{!nopie:} != ${directive} ]]) 364 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
365} 365}
366# Returns true if gcc builds with the stack protector 366# Returns true if gcc builds with the stack protector
367gcc-specs-ssp() { 367gcc-specs-ssp() {
368 local directive 368 local directive
369 directive=$(gcc-specs-directive cc1) 369 directive=$(gcc-specs-directive cc1)
370 return $([[ ${directive/\{!fno-stack-protector:} != ${directive} ]]) 370 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
371} 371}
372# Returns true if gcc upgrades fstack-protector to fstack-protector-all 372# Returns true if gcc upgrades fstack-protector to fstack-protector-all
373gcc-specs-ssp-to-all() { 373gcc-specs-ssp-to-all() {
374 local directive 374 local directive
375 directive=$(gcc-specs-directive cc1) 375 directive=$(gcc-specs-directive cc1)
376 return $([[ ${directive/\{!fno-stack-protector-all:} != ${directive} ]]) 376 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
377}
378# Returns true if gcc builds with fno-strict-overflow
379gcc-specs-nostrict() {
380 local directive
381 directive=$(gcc-specs-directive cc1)
382 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
377} 383}
378 384
379 385
380# @FUNCTION: gen_usr_ldscript 386# @FUNCTION: gen_usr_ldscript
381# @USAGE: <list of libs to create linker scripts for> 387# @USAGE: [-a] <list of libs to create linker scripts for>
382# @DESCRIPTION: 388# @DESCRIPTION:
383# This function generate linker scripts in /usr/lib for dynamic 389# This function generate linker scripts in /usr/lib for dynamic
384# libs in /lib. This is to fix linking problems when you have 390# libs in /lib. This is to fix linking problems when you have
385# the .so in /lib, and the .a in /usr/lib. What happens is that 391# the .so in /lib, and the .a in /usr/lib. What happens is that
386# in some cases when linking dynamic, the .a in /usr/lib is used 392# in some cases when linking dynamic, the .a in /usr/lib is used
390# 396#
391# Note that you should in general use the unversioned name of 397# Note that you should in general use the unversioned name of
392# the library (libfoo.so), as ldconfig should usually update it 398# the library (libfoo.so), as ldconfig should usually update it
393# correctly to point to the latest version of the library present. 399# correctly to point to the latest version of the library present.
394gen_usr_ldscript() { 400gen_usr_ldscript() {
395 local lib libdir=$(get_libdir) output_format="" 401 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
396 # Just make sure it exists 402 # Just make sure it exists
397 dodir /usr/${libdir} 403 dodir /usr/${libdir}
404
405 if [[ $1 == "-a" ]] ; then
406 auto=true
407 shift
408 dodir /${libdir}
409 fi
398 410
399 # OUTPUT_FORMAT gives hints to the linker as to what binary format 411 # OUTPUT_FORMAT gives hints to the linker as to what binary format
400 # is referenced ... makes multilib saner 412 # is referenced ... makes multilib saner
401 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p') 413 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
402 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )" 414 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
405 if [[ ${USERLAND} == "Darwin" ]] ; then 417 if [[ ${USERLAND} == "Darwin" ]] ; then
406 ewarn "Not creating fake dynamic library for $lib on Darwin;" 418 ewarn "Not creating fake dynamic library for $lib on Darwin;"
407 ewarn "making a symlink instead." 419 ewarn "making a symlink instead."
408 dosym "/${libdir}/${lib}" "/usr/${libdir}/${lib}" 420 dosym "/${libdir}/${lib}" "/usr/${libdir}/${lib}"
409 else 421 else
422 local tlib
423 if ${auto} ; then
424 lib="lib${lib}${suffix}"
425 mv "${D}"/usr/${libdir}/${lib}* "${D}"/${libdir}/ || die
426 tlib=$(scanelf -qF'%S#F' "${D}"/${libdir}/${lib})
427 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
428 rm -f "${D}"/${libdir}/${lib}
429 else
430 tlib=${lib}
431 fi
410 cat > "${D}/usr/${libdir}/${lib}" <<-END_LDSCRIPT 432 cat > "${D}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
411 /* GNU ld script 433 /* GNU ld script
412 Since Gentoo has critical dynamic libraries 434 Since Gentoo has critical dynamic libraries
413 in /lib, and the static versions in /usr/lib, 435 in /lib, and the static versions in /usr/lib,
414 we need to have a "fake" dynamic lib in /usr/lib, 436 we need to have a "fake" dynamic lib in /usr/lib,
415 otherwise we run into linking problems. 437 otherwise we run into linking problems.
416 438
417 See bug http://bugs.gentoo.org/4411 for more info. 439 See bug http://bugs.gentoo.org/4411 for more info.
418 */ 440 */
419 ${output_format} 441 ${output_format}
420 GROUP ( /${libdir}/${lib} ) 442 GROUP ( /${libdir}/${tlib} )
421 END_LDSCRIPT 443 END_LDSCRIPT
444 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
422 fi 445 fi
423 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
424 done 446 done
425} 447}

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