/[gentoo-x86]/eclass/toolchain-funcs.eclass
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1# Copyright 1999-2004 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 1.17 2004/12/30 21:27:27 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.83 2009/01/08 09:56:00 gengor Exp $
4# 4
5# @ECLASS: toolchain-funcs.eclass
6# @MAINTAINER:
5# Author: Toolchain Ninjas <ninjas@gentoo.org> 7# Toolchain Ninjas <toolchain@gentoo.org>
6# 8# @BLURB: functions to query common info about the toolchain
7# This eclass contains (or should) functions to get common info 9# @DESCRIPTION:
8# about the toolchain (libc/compiler/binutils/etc...) 10# The toolchain-funcs aims to provide a complete suite of functions
11# for gleaning useful information about the toolchain and to simplify
12# ugly things like cross-compiling and multilib. All of this is done
13# in such a way that you can rely on the function always returning
14# something sane.
9 15
10inherit eutils 16___ECLASS_RECUR_TOOLCHAIN_FUNCS="yes"
11 17[[ -z ${___ECLASS_RECUR_MULTILIB} ]] && inherit multilib
12ECLASS=toolchain-funcs
13INHERITED="$INHERITED $ECLASS"
14 18
15DESCRIPTION="Based on the ${ECLASS} eclass" 19DESCRIPTION="Based on the ${ECLASS} eclass"
16 20
17tc-getPROG() { 21tc-getPROG() {
18 local var=$1 22 local var=$1
21 if [[ -n ${!var} ]] ; then 25 if [[ -n ${!var} ]] ; then
22 echo "${!var}" 26 echo "${!var}"
23 return 0 27 return 0
24 fi 28 fi
25 29
26 if [[ -n ${CHOST} ]] ; then 30 local search=
27 local search=$(type -p "${CHOST}-${prog}") 31 [[ -n $3 ]] && search=$(type -p "$3-${prog}")
28 prog=${search##*/} 32 [[ -z ${search} && -n ${CHOST} ]] && search=$(type -p "${CHOST}-${prog}")
29 fi 33 [[ -n ${search} ]] && prog=${search##*/}
30 34
31 export ${var}=${prog} 35 export ${var}=${prog}
32 echo "${!var}" 36 echo "${!var}"
33} 37}
34 38
35# Returns the name of the archiver 39# @FUNCTION: tc-getAR
40# @USAGE: [toolchain prefix]
41# @RETURN: name of the archiver
36tc-getAR() { tc-getPROG AR ar; } 42tc-getAR() { tc-getPROG AR ar "$@"; }
37# Returns the name of the assembler 43# @FUNCTION: tc-getAS
44# @USAGE: [toolchain prefix]
45# @RETURN: name of the assembler
38tc-getAS() { tc-getPROG AS as; } 46tc-getAS() { tc-getPROG AS as "$@"; }
47# @FUNCTION: tc-getCC
48# @USAGE: [toolchain prefix]
39# Returns the name of the C compiler 49# @RETURN: name of the C compiler
40tc-getCC() { tc-getPROG CC gcc; } 50tc-getCC() { tc-getPROG CC gcc "$@"; }
51# @FUNCTION: tc-getCPP
52# @USAGE: [toolchain prefix]
53# @RETURN: name of the C preprocessor
54tc-getCPP() { tc-getPROG CPP cpp "$@"; }
55# @FUNCTION: tc-getCXX
56# @USAGE: [toolchain prefix]
41# Returns the name of the C++ compiler 57# @RETURN: name of the C++ compiler
42tc-getCXX() { tc-getPROG CXX g++; } 58tc-getCXX() { tc-getPROG CXX g++ "$@"; }
43# Returns the name of the linker 59# @FUNCTION: tc-getLD
60# @USAGE: [toolchain prefix]
61# @RETURN: name of the linker
44tc-getLD() { tc-getPROG LD ld; } 62tc-getLD() { tc-getPROG LD ld "$@"; }
63# @FUNCTION: tc-getSTRIP
64# @USAGE: [toolchain prefix]
65# @RETURN: name of the strip program
66tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
67# @FUNCTION: tc-getNM
68# @USAGE: [toolchain prefix]
45# Returns the name of the symbol/object thingy 69# @RETURN: name of the symbol/object thingy
46tc-getNM() { tc-getPROG NM nm; } 70tc-getNM() { tc-getPROG NM nm "$@"; }
71# @FUNCTION: tc-getRANLIB
72# @USAGE: [toolchain prefix]
47# Returns the name of the archiver indexer 73# @RETURN: name of the archiver indexer
48tc-getRANLIB() { tc-getPROG RANLIB ranlib; } 74tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
49# Returns the name of the fortran compiler 75# @FUNCTION: tc-getF77
76# @USAGE: [toolchain prefix]
77# @RETURN: name of the Fortran 77 compiler
50tc-getF77() { tc-getPROG F77 f77; } 78tc-getF77() { tc-getPROG F77 f77 "$@"; }
79# @FUNCTION: tc-getFC
80# @USAGE: [toolchain prefix]
81# @RETURN: name of the Fortran 90 compiler
82tc-getFC() { tc-getPROG FC gfortran "$@"; }
83# @FUNCTION: tc-getGCJ
84# @USAGE: [toolchain prefix]
51# Returns the name of the java compiler 85# @RETURN: name of the java compiler
52tc-getGCJ() { tc-getPROG GCJ gcj; } 86tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
53 87
54# Returns the name of the C compiler for build 88# @FUNCTION: tc-getBUILD_CC
89# @USAGE: [toolchain prefix]
90# @RETURN: name of the C compiler for building binaries to run on the build machine
55tc-getBUILD_CC() { 91tc-getBUILD_CC() {
92 local v
93 for v in CC_FOR_BUILD BUILD_CC HOSTCC ; do
56 if [[ -n ${CC_FOR_BUILD} ]] ; then 94 if [[ -n ${!v} ]] ; then
57 export BUILD_CC=${CC_FOR_BUILD} 95 export BUILD_CC=${!v}
58 echo "${CC_FOR_BUILD}" 96 echo "${!v}"
59 return 0 97 return 0
60 fi 98 fi
99 done
61 100
62 local search= 101 local search=
63 if [[ -n ${CBUILD} ]] ; then 102 if [[ -n ${CBUILD} ]] ; then
64 search=$(type -p "${CBUILD}-gcc") 103 search=$(type -p ${CBUILD}-gcc)
65 search=${search##*/} 104 search=${search##*/}
66 else
67 search=gcc
68 fi 105 fi
106 search=${search:-gcc}
69 107
70 export BUILD_CC=${search} 108 export BUILD_CC=${search}
71 echo "${search}" 109 echo "${search}"
72} 110}
73 111
112# @FUNCTION: tc-export
113# @USAGE: <list of toolchain variables>
114# @DESCRIPTION:
74# Quick way to export a bunch of vars at once 115# Quick way to export a bunch of compiler vars at once.
75tc-export() { 116tc-export() {
76 local var 117 local var
77 for var in "$@" ; do 118 for var in "$@" ; do
119 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
78 eval tc-get${var} 120 eval tc-get${var} > /dev/null
79 done 121 done
80} 122}
81 123
82# A simple way to see if we're using a cross-compiler ... 124# @FUNCTION: tc-is-cross-compiler
125# @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
83tc-is-cross-compiler() { 126tc-is-cross-compiler() {
84 if [[ -n ${CBUILD} ]] ; then
85 return $([[ ${CBUILD} != ${CHOST} ]]) 127 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
128}
129
130# @FUNCTION: tc-is-softfloat
131# @DESCRIPTION:
132# See if this toolchain is a softfloat based one.
133# @CODE
134# The possible return values:
135# - only: the target is always softfloat (never had fpu)
136# - yes: the target should support softfloat
137# - no: the target should support hardfloat
138# @CODE
139# This allows us to react differently where packages accept
140# softfloat flags in the case where support is optional, but
141# rejects softfloat flags where the target always lacks an fpu.
142tc-is-softfloat() {
143 case ${CTARGET} in
144 bfin*|h8300*)
145 echo "only" ;;
146 *)
147 [[ ${CTARGET//_/-} == *-softfloat-* ]] \
148 && echo "yes" \
149 || echo "no"
150 ;;
151 esac
152}
153
154# Parse information from CBUILD/CHOST/CTARGET rather than
155# use external variables from the profile.
156tc-ninja_magic_to_arch() {
157ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
158
159 local type=$1
160 local host=$2
161 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
162
163 case ${host} in
164 alpha*) echo alpha;;
165 arm*) echo arm;;
166 avr*) ninj avr32 avr;;
167 bfin*) ninj blackfin bfin;;
168 cris*) echo cris;;
169 hppa*) ninj parisc hppa;;
170 i?86*)
171 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
172 # trees have been unified into 'x86'.
173 # FreeBSD still uses i386
174 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
175 echo i386
176 else
177 echo x86
86 fi 178 fi
87 return 1 179 ;;
88} 180 ia64*) echo ia64;;
181 m68*) echo m68k;;
182 mips*) echo mips;;
183 nios2*) echo nios2;;
184 nios*) echo nios;;
185 powerpc*)
186 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
187 # have been unified into simply 'powerpc', but until 2.6.16,
188 # ppc32 is still using ARCH="ppc" as default
189 if [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] && [[ ${type} == "kern" ]] ; then
190 echo powerpc
191 elif [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] && [[ ${type} == "kern" ]] ; then
192 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
193 echo powerpc
194 else
195 echo ppc
196 fi
197 elif [[ ${host} == powerpc64* ]] ; then
198 echo ppc64
199 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
200 ninj ppc64 ppc
201 else
202 echo ppc
203 fi
204 ;;
205 s390*) echo s390;;
206 sh64*) ninj sh64 sh;;
207 sh*) echo sh;;
208 sparc64*) ninj sparc64 sparc;;
209 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
210 && ninj sparc64 sparc \
211 || echo sparc
212 ;;
213 vax*) echo vax;;
214 x86_64*)
215 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
216 # trees have been unified into 'x86'.
217 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
218 echo x86
219 else
220 ninj x86_64 amd64
221 fi
222 ;;
89 223
224 # since our usage of tc-arch is largely concerned with
225 # normalizing inputs for testing ${CTARGET}, let's filter
226 # other cross targets (mingw and such) into the unknown.
227 *) echo unknown;;
228 esac
229}
230# @FUNCTION: tc-arch-kernel
231# @USAGE: [toolchain prefix]
232# @RETURN: name of the kernel arch according to the compiler target
233tc-arch-kernel() {
234 tc-ninja_magic_to_arch kern "$@"
235}
236# @FUNCTION: tc-arch
237# @USAGE: [toolchain prefix]
238# @RETURN: name of the portage arch according to the compiler target
239tc-arch() {
240 tc-ninja_magic_to_arch portage "$@"
241}
90 242
91# Returns the version as by `$CC -dumpversion` 243tc-endian() {
244 local host=$1
245 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
246 host=${host%%-*}
247
248 case ${host} in
249 alpha*) echo big;;
250 arm*b*) echo big;;
251 arm*) echo little;;
252 cris*) echo little;;
253 hppa*) echo big;;
254 i?86*) echo little;;
255 ia64*) echo little;;
256 m68*) echo big;;
257 mips*l*) echo little;;
258 mips*) echo big;;
259 powerpc*) echo big;;
260 s390*) echo big;;
261 sh*b*) echo big;;
262 sh*) echo little;;
263 sparc*) echo big;;
264 x86_64*) echo little;;
265 *) echo wtf;;
266 esac
267}
268
269# @FUNCTION: gcc-fullversion
270# @RETURN: compiler version (major.minor.micro: [3.4.6])
92gcc-fullversion() { 271gcc-fullversion() {
93 echo "$($(tc-getCC) -dumpversion)" 272 $(tc-getCC "$@") -dumpversion
94} 273}
95# Returns the version, but only the <major>.<minor> 274# @FUNCTION: gcc-version
275# @RETURN: compiler version (major.minor: [3.4].6)
96gcc-version() { 276gcc-version() {
97 echo "$(gcc-fullversion | cut -f1,2 -d.)" 277 gcc-fullversion "$@" | cut -f1,2 -d.
98} 278}
99# Returns the Major version 279# @FUNCTION: gcc-major-version
280# @RETURN: major compiler version (major: [3].4.6)
100gcc-major-version() { 281gcc-major-version() {
101 echo "$(gcc-version | cut -f1 -d.)" 282 gcc-version "$@" | cut -f1 -d.
102} 283}
103# Returns the Minor version 284# @FUNCTION: gcc-minor-version
285# @RETURN: minor compiler version (minor: 3.[4].6)
104gcc-minor-version() { 286gcc-minor-version() {
105 echo "$(gcc-version | cut -f2 -d.)" 287 gcc-version "$@" | cut -f2 -d.
106} 288}
107# Returns the Micro version 289# @FUNCTION: gcc-micro-version
290# @RETURN: micro compiler version (micro: 3.4.[6])
108gcc-micro-version() { 291gcc-micro-version() {
109 echo "$(gcc-fullversion | cut -f3 -d.)" 292 gcc-fullversion "$@" | cut -f3 -d. | cut -f1 -d-
110} 293}
294
295# Returns the installation directory - internal toolchain
296# function for use by _gcc-specs-exists (for flag-o-matic).
297_gcc-install-dir() {
298 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
299 awk '$1=="install:" {print $2}')"
300}
301# Returns true if the indicated specs file exists - internal toolchain
302# function for use by flag-o-matic.
303_gcc-specs-exists() {
304 [[ -f $(_gcc-install-dir)/$1 ]]
305}
306
307# Returns requested gcc specs directive unprocessed - for used by
308# gcc-specs-directive()
309# Note; later specs normally overwrite earlier ones; however if a later
310# spec starts with '+' then it appends.
311# gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
312# as "Reading <file>", in order. Strictly speaking, if there's a
313# $(gcc_install_dir)/specs, the built-in specs aren't read, however by
314# the same token anything from 'gcc -dumpspecs' is overridden by
315# the contents of $(gcc_install_dir)/specs so the result is the
316# same either way.
317_gcc-specs-directive_raw() {
318 local cc=$(tc-getCC)
319 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
320 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
321'BEGIN { pspec=""; spec=""; outside=1 }
322$1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
323 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
324 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
325 { spec=spec $0 }
326END { print spec }'
327 return 0
328}
329
330# Return the requested gcc specs directive, with all included
331# specs expanded.
332# Note, it does not check for inclusion loops, which cause it
333# to never finish - but such loops are invalid for gcc and we're
334# assuming gcc is operational.
335gcc-specs-directive() {
336 local directive subdname subdirective
337 directive="$(_gcc-specs-directive_raw $1)"
338 while [[ ${directive} == *%\(*\)* ]]; do
339 subdname=${directive/*%\(}
340 subdname=${subdname/\)*}
341 subdirective="$(_gcc-specs-directive_raw ${subdname})"
342 directive="${directive//\%(${subdname})/${subdirective}}"
343 done
344 echo "${directive}"
345 return 0
346}
347
348# Returns true if gcc sets relro
349gcc-specs-relro() {
350 local directive
351 directive=$(gcc-specs-directive link_command)
352 return $([[ ${directive/\{!norelro:} != ${directive} ]])
353}
354# Returns true if gcc sets now
355gcc-specs-now() {
356 local directive
357 directive=$(gcc-specs-directive link_command)
358 return $([[ ${directive/\{!nonow:} != ${directive} ]])
359}
360# Returns true if gcc builds PIEs
361gcc-specs-pie() {
362 local directive
363 directive=$(gcc-specs-directive cc1)
364 return $([[ ${directive/\{!nopie:} != ${directive} ]])
365}
366# Returns true if gcc builds with the stack protector
367gcc-specs-ssp() {
368 local directive
369 directive=$(gcc-specs-directive cc1)
370 return $([[ ${directive/\{!fno-stack-protector:} != ${directive} ]])
371}
372# Returns true if gcc upgrades fstack-protector to fstack-protector-all
373gcc-specs-ssp-to-all() {
374 local directive
375 directive=$(gcc-specs-directive cc1)
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:} != ${directive} ]])
383}
384
385
386# @FUNCTION: gen_usr_ldscript
387# @USAGE: <list of libs to create linker scripts for>
388# @DESCRIPTION:
389# This function generate linker scripts in /usr/lib for dynamic
390# libs in /lib. This is to fix linking problems when you have
391# the .so in /lib, and the .a in /usr/lib. What happens is that
392# in some cases when linking dynamic, the .a in /usr/lib is used
393# instead of the .so in /lib due to gcc/libtool tweaking ld's
394# library search path. This causes many builds to fail.
395# See bug #4411 for more info.
396#
397# Note that you should in general use the unversioned name of
398# the library (libfoo.so), as ldconfig should usually update it
399# correctly to point to the latest version of the library present.
400gen_usr_ldscript() {
401 local lib libdir=$(get_libdir) output_format=""
402 # Just make sure it exists
403 dodir /usr/${libdir}
404
405 # OUTPUT_FORMAT gives hints to the linker as to what binary format
406 # is referenced ... makes multilib saner
407 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
408 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
409
410 for lib in "$@" ; do
411 if [[ ${USERLAND} == "Darwin" ]] ; then
412 ewarn "Not creating fake dynamic library for $lib on Darwin;"
413 ewarn "making a symlink instead."
414 dosym "/${libdir}/${lib}" "/usr/${libdir}/${lib}"
415 else
416 cat > "${D}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
417 /* GNU ld script
418 Since Gentoo has critical dynamic libraries
419 in /lib, and the static versions in /usr/lib,
420 we need to have a "fake" dynamic lib in /usr/lib,
421 otherwise we run into linking problems.
422
423 See bug http://bugs.gentoo.org/4411 for more info.
424 */
425 ${output_format}
426 GROUP ( /${libdir}/${lib} )
427 END_LDSCRIPT
428 fi
429 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
430 done
431}

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