Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tree: 5e406c2ea6
Fetching contributors…

Cannot retrieve contributors at this time

639 lines (595 sloc) 20.384 kb
# Copyright 1999-2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.100 2010/05/23 02:00:17 vapier Exp $
# @ECLASS: toolchain-funcs.eclass
# @MAINTAINER:
# Toolchain Ninjas <toolchain@gentoo.org>
# @BLURB: functions to query common info about the toolchain
# @DESCRIPTION:
# The toolchain-funcs aims to provide a complete suite of functions
# for gleaning useful information about the toolchain and to simplify
# ugly things like cross-compiling and multilib. All of this is done
# in such a way that you can rely on the function always returning
# something sane.
___ECLASS_RECUR_TOOLCHAIN_FUNCS="yes"
[[ -z ${___ECLASS_RECUR_MULTILIB} ]] && inherit multilib
DESCRIPTION="Based on the ${ECLASS} eclass"
tc-getPROG() {
local var=$1
local prog=$2
if [[ -n ${!var} ]] ; then
echo "${!var}"
return 0
fi
local search=
[[ -n $3 ]] && search=$(type -p "$3-${prog}")
[[ -z ${search} && -n ${CHOST} ]] && search=$(type -p "${CHOST}-${prog}")
[[ -n ${search} ]] && prog=${search##*/}
export ${var}=${prog}
echo "${!var}"
}
# @FUNCTION: tc-getAR
# @USAGE: [toolchain prefix]
# @RETURN: name of the archiver
tc-getAR() { tc-getPROG AR ar "$@"; }
# @FUNCTION: tc-getAS
# @USAGE: [toolchain prefix]
# @RETURN: name of the assembler
tc-getAS() { tc-getPROG AS as "$@"; }
# @FUNCTION: tc-getCC
# @USAGE: [toolchain prefix]
# @RETURN: name of the C compiler
tc-getCC() { tc-getPROG CC gcc "$@"; }
# @FUNCTION: tc-getCPP
# @USAGE: [toolchain prefix]
# @RETURN: name of the C preprocessor
tc-getCPP() { tc-getPROG CPP cpp "$@"; }
# @FUNCTION: tc-getCXX
# @USAGE: [toolchain prefix]
# @RETURN: name of the C++ compiler
tc-getCXX() { tc-getPROG CXX g++ "$@"; }
# @FUNCTION: tc-getLD
# @USAGE: [toolchain prefix]
# @RETURN: name of the linker
tc-getLD() { tc-getPROG LD ld "$@"; }
# @FUNCTION: tc-getSTRIP
# @USAGE: [toolchain prefix]
# @RETURN: name of the strip program
tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
# @FUNCTION: tc-getNM
# @USAGE: [toolchain prefix]
# @RETURN: name of the symbol/object thingy
tc-getNM() { tc-getPROG NM nm "$@"; }
# @FUNCTION: tc-getRANLIB
# @USAGE: [toolchain prefix]
# @RETURN: name of the archiver indexer
tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
# @FUNCTION: tc-getOBJCOPY
# @USAGE: [toolchain prefix]
# @RETURN: name of the object copier
tc-getOBJCOPY() { tc-getPROG OBJCOPY objcopy "$@"; }
# @FUNCTION: tc-getF77
# @USAGE: [toolchain prefix]
# @RETURN: name of the Fortran 77 compiler
tc-getF77() { tc-getPROG F77 f77 "$@"; }
# @FUNCTION: tc-getFC
# @USAGE: [toolchain prefix]
# @RETURN: name of the Fortran 90 compiler
tc-getFC() { tc-getPROG FC gfortran "$@"; }
# @FUNCTION: tc-getGCJ
# @USAGE: [toolchain prefix]
# @RETURN: name of the java compiler
tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
# @FUNCTION: tc-getPKG_CONFIG
# @USAGE: [toolchain prefix]
# @RETURN: name of the pkg-config tool
tc-getPKG_CONFIG() { tc-getPROG PKG_CONFIG pkg-config "$@"; }
# @FUNCTION: tc-getRC
# @USAGE: [toolchain prefix]
# @RETURN: name of the Windows resource compiler
tc-getRC() { tc-getPROG RC windres "$@"; }
# @FUNCTION: tc-getDLLWRAP
# @USAGE: [toolchain prefix]
# @RETURN: name of the Windows dllwrap utility
tc-getDLLWRAP() { tc-getPROG DLLWRAP dllwrap "$@"; }
# @FUNCTION: tc-getBUILD_CC
# @USAGE: [toolchain prefix]
# @RETURN: name of the C compiler for building binaries to run on the build machine
tc-getBUILD_CC() {
local v
for v in CC_FOR_BUILD BUILD_CC HOSTCC ; do
if [[ -n ${!v} ]] ; then
export BUILD_CC=${!v}
echo "${!v}"
return 0
fi
done
local search=
if [[ -n ${CBUILD} ]] ; then
search=$(type -p ${CBUILD}-gcc)
search=${search##*/}
fi
search=${search:-gcc}
export BUILD_CC=${search}
echo "${search}"
}
# @FUNCTION: tc-export
# @USAGE: <list of toolchain variables>
# @DESCRIPTION:
# Quick way to export a bunch of compiler vars at once.
tc-export() {
local var
for var in "$@" ; do
[[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
eval tc-get${var} > /dev/null
done
}
# @FUNCTION: tc-is-cross-compiler
# @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
tc-is-cross-compiler() {
return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
}
# @FUNCTION: tc-is-softfloat
# @DESCRIPTION:
# See if this toolchain is a softfloat based one.
# @CODE
# The possible return values:
# - only: the target is always softfloat (never had fpu)
# - yes: the target should support softfloat
# - no: the target doesn't support softfloat
# @CODE
# This allows us to react differently where packages accept
# softfloat flags in the case where support is optional, but
# rejects softfloat flags where the target always lacks an fpu.
tc-is-softfloat() {
case ${CTARGET} in
bfin*|h8300*)
echo "only" ;;
*)
[[ ${CTARGET//_/-} == *-softfloat-* ]] \
&& echo "yes" \
|| echo "no"
;;
esac
}
# @FUNCTION: tc-is-hardfloat
# @DESCRIPTION:
# See if this toolchain is a hardfloat based one.
# @CODE
# The possible return values:
# - yes: the target should support hardfloat
# - no: the target doesn't support hardfloat
tc-is-hardfloat() {
[[ ${CTARGET//_/-} == *-hardfloat-* ]] \
&& echo "yes" \
|| echo "no"
}
# @FUNCTION: tc-is-static-only
# @DESCRIPTION:
# Return shell true if the target does not support shared libs, shell false
# otherwise.
tc-is-static-only() {
local host=${CTARGET:-${CHOST}}
# *MiNT doesn't have shared libraries, only platform so far
return $([[ ${host} == *-mint* ]])
}
# @FUNCTION: tc-has-openmp
# @USAGE: [toolchain prefix]
# @DESCRIPTION:
# See if the toolchain supports OpenMP.
tc-has-openmp() {
local base="${T}/test-tc-openmp"
cat <<-EOF > "${base}.c"
#include <omp.h>
int main() {
int nthreads, tid, ret = 0;
#pragma omp parallel private(nthreads, tid)
{
tid = omp_get_thread_num();
nthreads = omp_get_num_threads(); ret += tid + nthreads;
}
return ret;
}
EOF
$(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
local ret=$?
rm -f "${base}"*
return ${ret}
}
# @FUNCTION: tc-has-tls
# @USAGE: [-s|-c|-l] [toolchain prefix]
# @DESCRIPTION:
# See if the toolchain supports thread local storage (TLS). Use -s to test the
# compiler, -c to also test the assembler, and -l to also test the C library
# (the default).
tc-has-tls() {
local base="${T}/test-tc-tls"
cat <<-EOF > "${base}.c"
int foo(int *i) {
static __thread int j = 0;
return *i ? j : *i;
}
EOF
local flags
case $1 in
-s) flags="-S";;
-c) flags="-c";;
-l) ;;
-*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
esac
: ${flags:=-fPIC -shared -Wl,-z,defs}
[[ $1 == -* ]] && shift
$(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
local ret=$?
rm -f "${base}"*
return ${ret}
}
# Parse information from CBUILD/CHOST/CTARGET rather than
# use external variables from the profile.
tc-ninja_magic_to_arch() {
ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
local type=$1
local host=$2
[[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
case ${host} in
alpha*) echo alpha;;
arm*) echo arm;;
avr*) ninj avr32 avr;;
bfin*) ninj blackfin bfin;;
cris*) echo cris;;
hppa*) ninj parisc hppa;;
i?86*) ninj i386 x86;;
ia64*) echo ia64;;
m68*) echo m68k;;
mips*) echo mips;;
nios2*) echo nios2;;
nios*) echo nios;;
powerpc*)
# Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
# have been unified into simply 'powerpc', but until 2.6.16,
# ppc32 is still using ARCH="ppc" as default
if [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] && [[ ${type} == "kern" ]] ; then
echo powerpc
elif [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] && [[ ${type} == "kern" ]] ; then
if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
echo powerpc
else
echo ppc
fi
elif [[ ${host} == powerpc64* ]] ; then
echo ppc64
elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
ninj ppc64 ppc
else
echo ppc
fi
;;
s390*) echo s390;;
sh64*) ninj sh64 sh;;
sh*) echo sh;;
sparc64*) ninj sparc64 sparc;;
sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
&& ninj sparc64 sparc \
|| echo sparc
;;
vax*) echo vax;;
x86_64*) ninj x86_64 amd64;;
# since our usage of tc-arch is largely concerned with
# normalizing inputs for testing ${CTARGET}, let's filter
# other cross targets (mingw and such) into the unknown.
*) echo unknown;;
esac
}
# @FUNCTION: tc-arch-kernel
# @USAGE: [toolchain prefix]
# @RETURN: name of the kernel arch according to the compiler target
tc-arch-kernel() {
tc-ninja_magic_to_arch kern "$@"
}
# @FUNCTION: tc-arch
# @USAGE: [toolchain prefix]
# @RETURN: name of the portage arch according to the compiler target
tc-arch() {
tc-ninja_magic_to_arch portage "$@"
}
tc-endian() {
local host=$1
[[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
host=${host%%-*}
case ${host} in
alpha*) echo big;;
arm*b*) echo big;;
arm*) echo little;;
cris*) echo little;;
hppa*) echo big;;
i?86*) echo little;;
ia64*) echo little;;
m68*) echo big;;
mips*l*) echo little;;
mips*) echo big;;
powerpc*) echo big;;
s390*) echo big;;
sh*b*) echo big;;
sh*) echo little;;
sparc*) echo big;;
x86_64*) echo little;;
*) echo wtf;;
esac
}
# @FUNCTION: gcc-fullversion
# @RETURN: compiler version (major.minor.micro: [3.4.6])
gcc-fullversion() {
$(tc-getCC "$@") -dumpversion
}
# @FUNCTION: gcc-version
# @RETURN: compiler version (major.minor: [3.4].6)
gcc-version() {
gcc-fullversion "$@" | cut -f1,2 -d.
}
# @FUNCTION: gcc-major-version
# @RETURN: major compiler version (major: [3].4.6)
gcc-major-version() {
gcc-version "$@" | cut -f1 -d.
}
# @FUNCTION: gcc-minor-version
# @RETURN: minor compiler version (minor: 3.[4].6)
gcc-minor-version() {
gcc-version "$@" | cut -f2 -d.
}
# @FUNCTION: gcc-micro-version
# @RETURN: micro compiler version (micro: 3.4.[6])
gcc-micro-version() {
gcc-fullversion "$@" | cut -f3 -d. | cut -f1 -d-
}
# Returns the installation directory - internal toolchain
# function for use by _gcc-specs-exists (for flag-o-matic).
_gcc-install-dir() {
echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
awk '$1=="install:" {print $2}')"
}
# Returns true if the indicated specs file exists - internal toolchain
# function for use by flag-o-matic.
_gcc-specs-exists() {
[[ -f $(_gcc-install-dir)/$1 ]]
}
# Returns requested gcc specs directive unprocessed - for used by
# gcc-specs-directive()
# Note; later specs normally overwrite earlier ones; however if a later
# spec starts with '+' then it appends.
# gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
# as "Reading <file>", in order. Strictly speaking, if there's a
# $(gcc_install_dir)/specs, the built-in specs aren't read, however by
# the same token anything from 'gcc -dumpspecs' is overridden by
# the contents of $(gcc_install_dir)/specs so the result is the
# same either way.
_gcc-specs-directive_raw() {
local cc=$(tc-getCC)
local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
'BEGIN { pspec=""; spec=""; outside=1 }
$1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
{ spec=spec $0 }
END { print spec }'
return 0
}
# Return the requested gcc specs directive, with all included
# specs expanded.
# Note, it does not check for inclusion loops, which cause it
# to never finish - but such loops are invalid for gcc and we're
# assuming gcc is operational.
gcc-specs-directive() {
local directive subdname subdirective
directive="$(_gcc-specs-directive_raw $1)"
while [[ ${directive} == *%\(*\)* ]]; do
subdname=${directive/*%\(}
subdname=${subdname/\)*}
subdirective="$(_gcc-specs-directive_raw ${subdname})"
directive="${directive//\%(${subdname})/${subdirective}}"
done
echo "${directive}"
return 0
}
# Returns true if gcc sets relro
gcc-specs-relro() {
local directive
directive=$(gcc-specs-directive link_command)
return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
}
# Returns true if gcc sets now
gcc-specs-now() {
local directive
directive=$(gcc-specs-directive link_command)
return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
}
# Returns true if gcc builds PIEs
gcc-specs-pie() {
local directive
directive=$(gcc-specs-directive cc1)
return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
}
# Returns true if gcc builds with the stack protector
gcc-specs-ssp() {
local directive
directive=$(gcc-specs-directive cc1)
return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
}
# Returns true if gcc upgrades fstack-protector to fstack-protector-all
gcc-specs-ssp-to-all() {
local directive
directive=$(gcc-specs-directive cc1)
return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
}
# Returns true if gcc builds with fno-strict-overflow
gcc-specs-nostrict() {
local directive
directive=$(gcc-specs-directive cc1)
return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
}
# @FUNCTION: gen_usr_ldscript
# @USAGE: [-a] <list of libs to create linker scripts for>
# @DESCRIPTION:
# This function generate linker scripts in /usr/lib for dynamic
# libs in /lib. This is to fix linking problems when you have
# the .so in /lib, and the .a in /usr/lib. What happens is that
# in some cases when linking dynamic, the .a in /usr/lib is used
# instead of the .so in /lib due to gcc/libtool tweaking ld's
# library search path. This causes many builds to fail.
# See bug #4411 for more info.
#
# Note that you should in general use the unversioned name of
# the library (libfoo.so), as ldconfig should usually update it
# correctly to point to the latest version of the library present.
gen_usr_ldscript() {
local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
[[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
tc-is-static-only && return
# Just make sure it exists
dodir /usr/${libdir}
if [[ $1 == "-a" ]] ; then
auto=true
shift
dodir /${libdir}
fi
# OUTPUT_FORMAT gives hints to the linker as to what binary format
# is referenced ... makes multilib saner
output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
[[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
for lib in "$@" ; do
local tlib
if ${auto} ; then
lib="lib${lib}${suffix}"
else
# Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
# This especially is for AIX where $(get_libname) can return ".a",
# so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
[[ -r ${ED}/${libdir}/${lib} ]] || continue
#TODO: better die here?
fi
case ${CTARGET:-${CHOST}} in
*-darwin*)
if ${auto} ; then
tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
else
tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
fi
[[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
tlib=${tlib##*/}
if ${auto} ; then
mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
# some install_names are funky: they encode a version
if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
fi
rm -f "${ED}"/${libdir}/${lib}
fi
# Mach-O files have an id, which is like a soname, it tells how
# another object linking against this lib should reference it.
# Since we moved the lib from usr/lib into lib this reference is
# wrong. Hence, we update it here. We don't configure with
# libdir=/lib because that messes up libtool files.
# Make sure we don't lose the specific version, so just modify the
# existing install_name
if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
local nowrite=yes
fi
install_name_tool \
-id "${EPREFIX}"/${libdir}/${tlib} \
"${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
[[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
# Now as we don't use GNU binutils and our linker doesn't
# understand linker scripts, just create a symlink.
pushd "${ED}/usr/${libdir}" > /dev/null
ln -snf "../../${libdir}/${tlib}" "${lib}"
popd > /dev/null
;;
*-aix*|*-irix*|*64*-hpux*|*-interix*|*-winnt*)
if ${auto} ; then
mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
# no way to retrieve soname on these platforms (?)
tlib=$(readlink "${ED}"/${libdir}/${lib})
tlib=${tlib##*/}
if [[ -z ${tlib} ]] ; then
# ok, apparently was not a symlink, don't remove it and
# just link to it
tlib=${lib}
else
rm -f "${ED}"/${libdir}/${lib}
fi
else
tlib=${lib}
fi
# we don't have GNU binutils on these platforms, so we symlink
# instead, which seems to work fine. Keep it relative, otherwise
# we break some QA checks in Portage
# on interix, the linker scripts would work fine in _most_
# situations. if a library links to such a linker script the
# absolute path to the correct library is inserted into the binary,
# which is wrong, since anybody linking _without_ libtool will miss
# some dependencies, since the stupid linker cannot find libraries
# hardcoded with absolute paths (as opposed to the loader, which
# seems to be able to do this).
# this has been seen while building shared-mime-info which needs
# libxml2, but links without libtool (and does not add libz to the
# command line by itself).
pushd "${ED}/usr/${libdir}" > /dev/null
ln -snf "../../${libdir}/${tlib}" "${lib}"
popd > /dev/null
;;
hppa*-hpux*) # PA-RISC 32bit (SOM) only, others (ELF) match *64*-hpux* above.
if ${auto} ; then
tlib=$(chatr "${ED}"/usr/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
[[ -z ${tlib} ]] && tlib=${lib}
tlib=${tlib##*/} # 'internal name' can have a path component
mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
# some SONAMEs are funky: they encode a version before the .so
if [[ ${tlib} != ${lib}* ]] ; then
mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
fi
[[ ${tlib} != ${lib} ]] &&
rm -f "${ED}"/${libdir}/${lib}
else
tlib=$(chatr "${ED}"/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
[[ -z ${tlib} ]] && tlib=${lib}
tlib=${tlib##*/} # 'internal name' can have a path component
fi
pushd "${ED}"/usr/${libdir} >/dev/null
ln -snf "../../${libdir}/${tlib}" "${lib}"
# need the internal name in usr/lib too, to be available at runtime
# when linked with /path/to/lib.sl (hardcode_direct_absolute=yes)
[[ ${tlib} != ${lib} ]] &&
ln -snf "../../${libdir}/${tlib}" "${tlib}"
popd >/dev/null
;;
*)
if ${auto} ; then
tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
[[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
# some SONAMEs are funky: they encode a version before the .so
if [[ ${tlib} != ${lib}* ]] ; then
mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
fi
rm -f "${ED}"/${libdir}/${lib}
else
tlib=${lib}
fi
cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
/* GNU ld script
Since Gentoo has critical dynamic libraries in /lib, and the static versions
in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
run into linking problems. This "fake" dynamic lib is a linker script that
redirects the linker to the real lib. And yes, this works in the cross-
compiling scenario as the sysroot-ed linker will prepend the real path.
See bug http://bugs.gentoo.org/4411 for more info.
*/
${output_format}
GROUP ( ${EPREFIX}/${libdir}/${tlib} )
END_LDSCRIPT
;;
esac
fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
done
}
Jump to Line
Something went wrong with that request. Please try again.