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# Copyright 1999-2007 Gentoo Foundation
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# Distributed under the terms of the GNU General Public License v2
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# $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.91 2009/05/24 07:25:48 grobian Exp $
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# @ECLASS: toolchain-funcs.eclass
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# @MAINTAINER:
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# Toolchain Ninjas <toolchain@gentoo.org>
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# @BLURB: functions to query common info about the toolchain
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# @DESCRIPTION:
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# The toolchain-funcs aims to provide a complete suite of functions
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# for gleaning useful information about the toolchain and to simplify
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# ugly things like cross-compiling and multilib. All of this is done
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# in such a way that you can rely on the function always returning
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# something sane.
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___ECLASS_RECUR_TOOLCHAIN_FUNCS="yes"
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[[ -z ${___ECLASS_RECUR_MULTILIB} ]] && inherit multilib
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DESCRIPTION="Based on the ${ECLASS} eclass"
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tc-getPROG() {
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local var=$1
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local prog=$2
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if [[ -n ${!var} ]] ; then
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echo "${!var}"
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return 0
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fi
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local search=
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[[ -n $3 ]] && search=$(type -p "$3-${prog}")
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[[ -z ${search} && -n ${CHOST} ]] && search=$(type -p "${CHOST}-${prog}")
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[[ -n ${search} ]] && prog=${search##*/}
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export ${var}=${prog}
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echo "${!var}"
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}
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# @FUNCTION: tc-getAR
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# @USAGE: [toolchain prefix]
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# @RETURN: name of the archiver
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tc-getAR() { tc-getPROG AR ar "$@"; }
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# @FUNCTION: tc-getAS
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# @USAGE: [toolchain prefix]
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# @RETURN: name of the assembler
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tc-getAS() { tc-getPROG AS as "$@"; }
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# @FUNCTION: tc-getCC
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# @USAGE: [toolchain prefix]
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# @RETURN: name of the C compiler
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tc-getCC() { tc-getPROG CC gcc "$@"; }
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# @FUNCTION: tc-getCPP
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# @USAGE: [toolchain prefix]
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# @RETURN: name of the C preprocessor
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tc-getCPP() { tc-getPROG CPP cpp "$@"; }
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# @FUNCTION: tc-getCXX
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# @USAGE: [toolchain prefix]
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# @RETURN: name of the C++ compiler
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tc-getCXX() { tc-getPROG CXX g++ "$@"; }
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# @FUNCTION: tc-getLD
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# @USAGE: [toolchain prefix]
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# @RETURN: name of the linker
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tc-getLD() { tc-getPROG LD ld "$@"; }
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# @FUNCTION: tc-getSTRIP
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# @USAGE: [toolchain prefix]
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# @RETURN: name of the strip program
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tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
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# @FUNCTION: tc-getNM
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# @USAGE: [toolchain prefix]
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# @RETURN: name of the symbol/object thingy
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tc-getNM() { tc-getPROG NM nm "$@"; }
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# @FUNCTION: tc-getRANLIB
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# @USAGE: [toolchain prefix]
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# @RETURN: name of the archiver indexer
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tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
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# @FUNCTION: tc-getOBJCOPY
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# @USAGE: [toolchain prefix]
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# @RETURN: name of the object copier
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tc-getOBJCOPY() { tc-getPROG OBJCOPY objcopy "$@"; }
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# @FUNCTION: tc-getF77
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# @USAGE: [toolchain prefix]
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# @RETURN: name of the Fortran 77 compiler
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tc-getF77() { tc-getPROG F77 f77 "$@"; }
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# @FUNCTION: tc-getFC
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# @USAGE: [toolchain prefix]
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# @RETURN: name of the Fortran 90 compiler
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tc-getFC() { tc-getPROG FC gfortran "$@"; }
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# @FUNCTION: tc-getGCJ
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# @USAGE: [toolchain prefix]
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# @RETURN: name of the java compiler
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tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
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# @FUNCTION: tc-getBUILD_CC
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# @USAGE: [toolchain prefix]
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# @RETURN: name of the C compiler for building binaries to run on the build machine
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tc-getBUILD_CC() {
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local v
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for v in CC_FOR_BUILD BUILD_CC HOSTCC ; do
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if [[ -n ${!v} ]] ; then
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export BUILD_CC=${!v}
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echo "${!v}"
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return 0
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fi
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done
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local search=
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if [[ -n ${CBUILD} ]] ; then
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search=$(type -p ${CBUILD}-gcc)
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search=${search##*/}
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fi
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search=${search:-gcc}
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export BUILD_CC=${search}
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echo "${search}"
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}
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# @FUNCTION: tc-export
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# @USAGE: <list of toolchain variables>
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# @DESCRIPTION:
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# Quick way to export a bunch of compiler vars at once.
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tc-export() {
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local var
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for var in "$@" ; do
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[[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
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eval tc-get${var} > /dev/null
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done
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}
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# @FUNCTION: tc-is-cross-compiler
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# @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
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tc-is-cross-compiler() {
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return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
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}
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# @FUNCTION: tc-is-softfloat
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# @DESCRIPTION:
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# See if this toolchain is a softfloat based one.
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# @CODE
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# The possible return values:
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# - only: the target is always softfloat (never had fpu)
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# - yes: the target should support softfloat
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# - no: the target should support hardfloat
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# @CODE
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# This allows us to react differently where packages accept
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# softfloat flags in the case where support is optional, but
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# rejects softfloat flags where the target always lacks an fpu.
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tc-is-softfloat() {
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case ${CTARGET} in
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bfin*|h8300*)
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echo "only" ;;
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*)
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[[ ${CTARGET//_/-} == *-softfloat-* ]] \
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&& echo "yes" \
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|| echo "no"
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;;
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esac
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}
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# @FUNCTION: tc-is-static-only
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# @DESCRIPTION:
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# Return shell true if the target does not support shared libs, shell false
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# otherwise.
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tc-is-static-only() {
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local host=${CTARGET:-${CHOST}}
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# *MiNT doesn't have shared libraries, only platform so far
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return $([[ ${host} == *-mint* ]])
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}
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# Parse information from CBUILD/CHOST/CTARGET rather than
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# use external variables from the profile.
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tc-ninja_magic_to_arch() {
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ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
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local type=$1
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local host=$2
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[[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
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case ${host} in
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alpha*) echo alpha;;
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arm*) echo arm;;
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avr*) ninj avr32 avr;;
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bfin*) ninj blackfin bfin;;
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cris*) echo cris;;
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hppa*) ninj parisc hppa;;
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i?86*)
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# Starting with linux-2.6.24, the 'x86_64' and 'i386'
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# trees have been unified into 'x86'.
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# FreeBSD still uses i386
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if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
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echo i386
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else
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echo x86
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fi
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;;
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ia64*) echo ia64;;
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m68*) echo m68k;;
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mips*) echo mips;;
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nios2*) echo nios2;;
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nios*) echo nios;;
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powerpc*)
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# Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
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# have been unified into simply 'powerpc', but until 2.6.16,
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# ppc32 is still using ARCH="ppc" as default
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if [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] && [[ ${type} == "kern" ]] ; then
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echo powerpc
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elif [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] && [[ ${type} == "kern" ]] ; then
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if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
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echo powerpc
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else
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echo ppc
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fi
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elif [[ ${host} == powerpc64* ]] ; then
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echo ppc64
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elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
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ninj ppc64 ppc
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else
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echo ppc
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fi
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;;
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s390*) echo s390;;
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sh64*) ninj sh64 sh;;
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sh*) echo sh;;
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sparc64*) ninj sparc64 sparc;;
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sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
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&& ninj sparc64 sparc \
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|| echo sparc
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;;
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vax*) echo vax;;
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x86_64*)
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# Starting with linux-2.6.24, the 'x86_64' and 'i386'
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# trees have been unified into 'x86'.
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if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
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echo x86
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else
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ninj x86_64 amd64
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fi
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;;
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# since our usage of tc-arch is largely concerned with
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# normalizing inputs for testing ${CTARGET}, let's filter
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# other cross targets (mingw and such) into the unknown.
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*) echo unknown;;
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esac
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}
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# @FUNCTION: tc-arch-kernel
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# @USAGE: [toolchain prefix]
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# @RETURN: name of the kernel arch according to the compiler target
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tc-arch-kernel() {
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tc-ninja_magic_to_arch kern "$@"
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}
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# @FUNCTION: tc-arch
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# @USAGE: [toolchain prefix]
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# @RETURN: name of the portage arch according to the compiler target
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tc-arch() {
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tc-ninja_magic_to_arch portage "$@"
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}
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tc-endian() {
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local host=$1
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[[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
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host=${host%%-*}
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case ${host} in
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alpha*) echo big;;
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arm*b*) echo big;;
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arm*) echo little;;
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cris*) echo little;;
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hppa*) echo big;;
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i?86*) echo little;;
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ia64*) echo little;;
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m68*) echo big;;
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mips*l*) echo little;;
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mips*) echo big;;
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powerpc*) echo big;;
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s390*) echo big;;
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sh*b*) echo big;;
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sh*) echo little;;
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sparc*) echo big;;
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x86_64*) echo little;;
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*) echo wtf;;
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esac
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}
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# @FUNCTION: gcc-fullversion
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# @RETURN: compiler version (major.minor.micro: [3.4.6])
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gcc-fullversion() {
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$(tc-getCC "$@") -dumpversion
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}
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# @FUNCTION: gcc-version
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# @RETURN: compiler version (major.minor: [3.4].6)
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gcc-version() {
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gcc-fullversion "$@" | cut -f1,2 -d.
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}
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# @FUNCTION: gcc-major-version
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# @RETURN: major compiler version (major: [3].4.6)
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gcc-major-version() {
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gcc-version "$@" | cut -f1 -d.
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}
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# @FUNCTION: gcc-minor-version
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# @RETURN: minor compiler version (minor: 3.[4].6)
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gcc-minor-version() {
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gcc-version "$@" | cut -f2 -d.
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}
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# @FUNCTION: gcc-micro-version
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# @RETURN: micro compiler version (micro: 3.4.[6])
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gcc-micro-version() {
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gcc-fullversion "$@" | cut -f3 -d. | cut -f1 -d-
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}
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# Returns the installation directory - internal toolchain
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# function for use by _gcc-specs-exists (for flag-o-matic).
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_gcc-install-dir() {
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echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
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awk '$1=="install:" {print $2}')"
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}
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# Returns true if the indicated specs file exists - internal toolchain
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# function for use by flag-o-matic.
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_gcc-specs-exists() {
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[[ -f $(_gcc-install-dir)/$1 ]]
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}
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# Returns requested gcc specs directive unprocessed - for used by
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# gcc-specs-directive()
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# Note; later specs normally overwrite earlier ones; however if a later
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# spec starts with '+' then it appends.
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# gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
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# as "Reading <file>", in order. Strictly speaking, if there's a
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# $(gcc_install_dir)/specs, the built-in specs aren't read, however by
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# the same token anything from 'gcc -dumpspecs' is overridden by
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# the contents of $(gcc_install_dir)/specs so the result is the
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# same either way.
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_gcc-specs-directive_raw() {
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local cc=$(tc-getCC)
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local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
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${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
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'BEGIN { pspec=""; spec=""; outside=1 }
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$1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
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outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
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spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
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{ spec=spec $0 }
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END { print spec }'
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return 0
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}
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# Return the requested gcc specs directive, with all included
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# specs expanded.
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# Note, it does not check for inclusion loops, which cause it
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# to never finish - but such loops are invalid for gcc and we're
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# assuming gcc is operational.
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gcc-specs-directive() {
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local directive subdname subdirective
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directive="$(_gcc-specs-directive_raw $1)"
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while [[ ${directive} == *%\(*\)* ]]; do
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subdname=${directive/*%\(}
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subdname=${subdname/\)*}
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subdirective="$(_gcc-specs-directive_raw ${subdname})"
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directive="${directive//\%(${subdname})/${subdirective}}"
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done
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echo "${directive}"
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return 0
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}
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# Returns true if gcc sets relro
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gcc-specs-relro() {
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local directive
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directive=$(gcc-specs-directive link_command)
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return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
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}
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# Returns true if gcc sets now
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gcc-specs-now() {
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local directive
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directive=$(gcc-specs-directive link_command)
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return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
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}
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| 376 |
# Returns true if gcc builds PIEs
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gcc-specs-pie() {
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local directive
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directive=$(gcc-specs-directive cc1)
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return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
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}
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| 382 |
# Returns true if gcc builds with the stack protector
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| 383 |
gcc-specs-ssp() {
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local directive
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directive=$(gcc-specs-directive cc1)
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return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
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}
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# Returns true if gcc upgrades fstack-protector to fstack-protector-all
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gcc-specs-ssp-to-all() {
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local directive
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directive=$(gcc-specs-directive cc1)
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return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
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}
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# Returns true if gcc builds with fno-strict-overflow
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gcc-specs-nostrict() {
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local directive
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directive=$(gcc-specs-directive cc1)
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return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
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}
|
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# @FUNCTION: gen_usr_ldscript
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# @USAGE: [-a] <list of libs to create linker scripts for>
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| 404 |
# @DESCRIPTION:
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| 405 |
# This function generate linker scripts in /usr/lib for dynamic
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| 406 |
# libs in /lib. This is to fix linking problems when you have
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| 407 |
# the .so in /lib, and the .a in /usr/lib. What happens is that
|
| 408 |
# in some cases when linking dynamic, the .a in /usr/lib is used
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| 409 |
# instead of the .so in /lib due to gcc/libtool tweaking ld's
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# library search path. This causes many builds to fail.
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# See bug #4411 for more info.
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#
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| 413 |
# Note that you should in general use the unversioned name of
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# the library (libfoo.so), as ldconfig should usually update it
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# correctly to point to the latest version of the library present.
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| 416 |
gen_usr_ldscript() {
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| 417 |
local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
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| 418 |
[[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
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| 419 |
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tc-is-static-only && return
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| 421 |
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| 422 |
# Just make sure it exists
|
| 423 |
dodir /usr/${libdir}
|
| 424 |
|
| 425 |
if [[ $1 == "-a" ]] ; then
|
| 426 |
auto=true
|
| 427 |
shift
|
| 428 |
dodir /${libdir}
|
| 429 |
fi
|
| 430 |
|
| 431 |
# OUTPUT_FORMAT gives hints to the linker as to what binary format
|
| 432 |
# is referenced ... makes multilib saner
|
| 433 |
output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
|
| 434 |
[[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
|
| 435 |
|
| 436 |
for lib in "$@" ; do
|
| 437 |
local tlib
|
| 438 |
if ${auto} ; then
|
| 439 |
lib="lib${lib}${suffix}"
|
| 440 |
else
|
| 441 |
# Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
|
| 442 |
# This especially is for AIX where $(get_libname) can return ".a",
|
| 443 |
# so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
|
| 444 |
[[ -r ${ED}/${libdir}/${lib} ]] || continue
|
| 445 |
#TODO: better die here?
|
| 446 |
fi
|
| 447 |
|
| 448 |
case ${CTARGET:-${CHOST}} in
|
| 449 |
*-darwin*)
|
| 450 |
if ${auto} ; then
|
| 451 |
tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
|
| 452 |
else
|
| 453 |
tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
|
| 454 |
fi
|
| 455 |
[[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
|
| 456 |
tlib=${tlib##*/}
|
| 457 |
|
| 458 |
if ${auto} ; then
|
| 459 |
mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
|
| 460 |
# some install_names are funky: they encode a version
|
| 461 |
if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
|
| 462 |
mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
|
| 463 |
fi
|
| 464 |
rm -f "${ED}"/${libdir}/${lib}
|
| 465 |
fi
|
| 466 |
|
| 467 |
# Mach-O files have an id, which is like a soname, it tells how
|
| 468 |
# another object linking against this lib should reference it.
|
| 469 |
# Since we moved the lib from usr/lib into lib this reference is
|
| 470 |
# wrong. Hence, we update it here. We don't configure with
|
| 471 |
# libdir=/lib because that messes up libtool files.
|
| 472 |
# Make sure we don't lose the specific version, so just modify the
|
| 473 |
# existing install_name
|
| 474 |
install_name_tool \
|
| 475 |
-id "${EPREFIX}"/${libdir}/${tlib} \
|
| 476 |
"${ED}"/${libdir}/${tlib}
|
| 477 |
# Now as we don't use GNU binutils and our linker doesn't
|
| 478 |
# understand linker scripts, just create a symlink.
|
| 479 |
pushd "${ED}/usr/${libdir}" > /dev/null
|
| 480 |
ln -snf "../../${libdir}/${tlib}" "${lib}"
|
| 481 |
popd > /dev/null
|
| 482 |
;;
|
| 483 |
*-aix*|*-irix*|*-hpux*|*-interix*|*-winnt*)
|
| 484 |
if ${auto} ; then
|
| 485 |
mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
|
| 486 |
# no way to retrieve soname on these platforms (?)
|
| 487 |
tlib=$(readlink "${ED}"/${libdir}/${lib})
|
| 488 |
tlib=${tlib##*/}
|
| 489 |
if [[ -z ${tlib} ]] ; then
|
| 490 |
# ok, apparently was not a symlink, don't remove it and
|
| 491 |
# just link to it
|
| 492 |
tlib=${lib}
|
| 493 |
else
|
| 494 |
rm -f "${ED}"/${libdir}/${lib}
|
| 495 |
fi
|
| 496 |
else
|
| 497 |
tlib=${lib}
|
| 498 |
fi
|
| 499 |
|
| 500 |
# we don't have GNU binutils on these platforms, so we symlink
|
| 501 |
# instead, which seems to work fine. Keep it relative, otherwise
|
| 502 |
# we break some QA checks in Portage
|
| 503 |
# on interix, the linker scripts would work fine in _most_
|
| 504 |
# situations. if a library links to such a linker script the
|
| 505 |
# absolute path to the correct library is inserted into the binary,
|
| 506 |
# which is wrong, since anybody linking _without_ libtool will miss
|
| 507 |
# some dependencies, since the stupid linker cannot find libraries
|
| 508 |
# hardcoded with absolute paths (as opposed to the loader, which
|
| 509 |
# seems to be able to do this).
|
| 510 |
# this has been seen while building shared-mime-info which needs
|
| 511 |
# libxml2, but links without libtool (and does not add libz to the
|
| 512 |
# command line by itself).
|
| 513 |
pushd "${ED}/usr/${libdir}" > /dev/null
|
| 514 |
ln -snf "../../${libdir}/${tlib}" "${lib}"
|
| 515 |
popd > /dev/null
|
| 516 |
;;
|
| 517 |
*)
|
| 518 |
if ${auto} ; then
|
| 519 |
tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
|
| 520 |
[[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
|
| 521 |
mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
|
| 522 |
# some SONAMEs are funky: they encode a version before the .so
|
| 523 |
if [[ ${tlib} != ${lib}* ]] ; then
|
| 524 |
mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
|
| 525 |
fi
|
| 526 |
rm -f "${ED}"/${libdir}/${lib}
|
| 527 |
else
|
| 528 |
tlib=${lib}
|
| 529 |
fi
|
| 530 |
cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
|
| 531 |
/* GNU ld script
|
| 532 |
Since Gentoo has critical dynamic libraries in /lib, and the static versions
|
| 533 |
in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
|
| 534 |
run into linking problems. This "fake" dynamic lib is a linker script that
|
| 535 |
redirects the linker to the real lib. And yes, this works in the cross-
|
| 536 |
compiling scenario as the sysroot-ed linker will prepend the real path.
|
| 537 |
|
| 538 |
See bug http://bugs.gentoo.org/4411 for more info.
|
| 539 |
*/
|
| 540 |
${output_format}
|
| 541 |
GROUP ( ${EPREFIX}/${libdir}/${tlib} )
|
| 542 |
END_LDSCRIPT
|
| 543 |
;;
|
| 544 |
esac
|
| 545 |
fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
|
| 546 |
done
|
| 547 |
}
|
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| 
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