/[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 1.24 2005/01/15 09:05:56 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.74 2007/08/17 10:14:13 vapier 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
10ECLASS=toolchain-funcs 16___ECLASS_RECUR_TOOLCHAIN_FUNCS="yes"
11INHERITED="$INHERITED $ECLASS" 17[[ -z ${___ECLASS_RECUR_MULTILIB} ]] && inherit multilib
12 18
13DESCRIPTION="Based on the ${ECLASS} eclass" 19DESCRIPTION="Based on the ${ECLASS} eclass"
14 20
15tc-getPROG() { 21tc-getPROG() {
16 local var=$1 22 local var=$1
19 if [[ -n ${!var} ]] ; then 25 if [[ -n ${!var} ]] ; then
20 echo "${!var}" 26 echo "${!var}"
21 return 0 27 return 0
22 fi 28 fi
23 29
24 if [[ -n ${CHOST} ]] ; then 30 local search=
25 local search=$(type -p "${CHOST}-${prog}") 31 [[ -n $3 ]] && search=$(type -p "$3-${prog}")
32 [[ -z ${search} && -n ${CHOST} ]] && search=$(type -p "${CHOST}-${prog}")
26 [[ -n ${search} ]] && prog=${search##*/} 33 [[ -n ${search} ]] && prog=${search##*/}
27 fi
28 34
29 export ${var}=${prog} 35 export ${var}=${prog}
30 echo "${!var}" 36 echo "${!var}"
31} 37}
32 38
33# Returns the name of the archiver 39# @FUNCTION: tc-getAR
40# @USAGE: [toolchain prefix]
41# @RETURN: name of the archiver
34tc-getAR() { tc-getPROG AR ar; } 42tc-getAR() { tc-getPROG AR ar "$@"; }
35# Returns the name of the assembler 43# @FUNCTION: tc-getAS
44# @USAGE: [toolchain prefix]
45# @RETURN: name of the assembler
36tc-getAS() { tc-getPROG AS as; } 46tc-getAS() { tc-getPROG AS as "$@"; }
47# @FUNCTION: tc-getCC
48# @USAGE: [toolchain prefix]
37# Returns the name of the C compiler 49# @RETURN: name of the C compiler
38tc-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]
39# Returns the name of the C++ compiler 57# @RETURN: name of the C++ compiler
40tc-getCXX() { tc-getPROG CXX g++; } 58tc-getCXX() { tc-getPROG CXX g++ "$@"; }
41# Returns the name of the linker 59# @FUNCTION: tc-getLD
60# @USAGE: [toolchain prefix]
61# @RETURN: name of the linker
42tc-getLD() { tc-getPROG LD ld; } 62tc-getLD() { tc-getPROG LD ld "$@"; }
63# @FUNCTION: tc-getSTRIP
64# @USAGE: [toolchain prefix]
65# @RETURN: name of the strip program
66tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
67# @FUNCTION: tc-getNM
68# @USAGE: [toolchain prefix]
43# Returns the name of the symbol/object thingy 69# @RETURN: name of the symbol/object thingy
44tc-getNM() { tc-getPROG NM nm; } 70tc-getNM() { tc-getPROG NM nm "$@"; }
71# @FUNCTION: tc-getRANLIB
72# @USAGE: [toolchain prefix]
45# Returns the name of the archiver indexer 73# @RETURN: name of the archiver indexer
46tc-getRANLIB() { tc-getPROG RANLIB ranlib; } 74tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
47# Returns the name of the fortran compiler 75# @FUNCTION: tc-getF77
76# @USAGE: [toolchain prefix]
77# @RETURN: name of the Fortran 77 compiler
48tc-getF77() { tc-getPROG F77 f77; } 78tc-getF77() { tc-getPROG F77 f77 "$@"; }
79# @FUNCTION: tc-getF90
80# @USAGE: [toolchain prefix]
81# @RETURN: name of the Fortran 90 compiler
82tc-getF90() { tc-getPROG F90 gfortran "$@"; }
83# @FUNCTION: tc-getFORTRAN
84# @USAGE: [toolchain prefix]
85# @RETURN: name of the Fortran compiler
86tc-getFORTRAN() { tc-getPROG FORTRAN gfortran "$@"; }
87# @FUNCTION: tc-getGCJ
88# @USAGE: [toolchain prefix]
49# Returns the name of the java compiler 89# @RETURN: name of the java compiler
50tc-getGCJ() { tc-getPROG GCJ gcj; } 90tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
51 91
52# Returns the name of the C compiler for build 92# @FUNCTION: tc-getBUILD_CC
93# @USAGE: [toolchain prefix]
94# @RETURN: name of the C compiler for building binaries to run on the build machine
53tc-getBUILD_CC() { 95tc-getBUILD_CC() {
96 local v
97 for v in CC_FOR_BUILD BUILD_CC HOSTCC ; do
54 if [[ -n ${CC_FOR_BUILD} ]] ; then 98 if [[ -n ${!v} ]] ; then
55 export BUILD_CC=${CC_FOR_BUILD} 99 export BUILD_CC=${!v}
56 echo "${CC_FOR_BUILD}" 100 echo "${!v}"
57 return 0 101 return 0
58 fi 102 fi
103 done
59 104
60 local search= 105 local search=
61 if [[ -n ${CBUILD} ]] ; then 106 if [[ -n ${CBUILD} ]] ; then
62 search=$(type -p ${CBUILD}-gcc) 107 search=$(type -p ${CBUILD}-gcc)
63 search=${search##*/} 108 search=${search##*/}
64 else
65 search=gcc
66 fi 109 fi
110 search=${search:-gcc}
67 111
68 export BUILD_CC=${search} 112 export BUILD_CC=${search}
69 echo "${search}" 113 echo "${search}"
70} 114}
71 115
116# @FUNCTION: tc-export
117# @USAGE: <list of toolchain variables>
118# @DESCRIPTION:
72# Quick way to export a bunch of vars at once 119# Quick way to export a bunch of compiler vars at once.
73tc-export() { 120tc-export() {
74 local var 121 local var
75 for var in "$@" ; do 122 for var in "$@" ; do
76 eval tc-get${var} 123 eval tc-get${var} > /dev/null
77 done 124 done
78} 125}
79 126
80# A simple way to see if we're using a cross-compiler ... 127# @FUNCTION: tc-is-cross-compiler
128# @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
81tc-is-cross-compiler() { 129tc-is-cross-compiler() {
82 if [[ -n ${CBUILD} ]] ; then
83 return $([[ ${CBUILD} != ${CHOST} ]]) 130 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
84 fi
85 return 1
86} 131}
87 132
133# @FUNCTION: tc-is-softfloat
134# @DESCRIPTION:
135# See if this toolchain is a softfloat based one.
136# @CODE
137# The possible return values:
138# - only: the target is always softfloat (never had fpu)
139# - yes: the target should support softfloat
140# - no: the target should support hardfloat
141# @CODE
142# This allows us to react differently where packages accept
143# softfloat flags in the case where support is optional, but
144# rejects softfloat flags where the target always lacks an fpu.
145tc-is-softfloat() {
146 case ${CTARGET} in
147 bfin*|h8300*)
148 echo "only" ;;
149 *)
150 [[ ${CTARGET//_/-} == *-softfloat-* ]] \
151 && echo "yes" \
152 || echo "no"
153 ;;
154 esac
155}
88 156
89# Parse information from CBUILD/CHOST/CTARGET rather than 157# Parse information from CBUILD/CHOST/CTARGET rather than
90# use external variables from the profile. 158# use external variables from the profile.
91tc-ninja_magic_to_arch() { 159tc-ninja_magic_to_arch() {
92ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; } 160ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
93 161
94 local type=$1 162 local type=$1
95 local host=$2 163 local host=$2
96 [[ -z ${host} ]] && arg=${CTARGET:-${CHOST}} 164 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
97 165
98 case ${host} in 166 case ${host} in
99 alpha*) echo alpha;; 167 alpha*) echo alpha;;
100 x86_64*) ninj x86_64 amd64;;
101 arm*) echo arm;; 168 arm*) echo arm;;
169 avr*) ninj avr32 avr;;
170 bfin*) ninj blackfin bfin;;
171 cris*) echo cris;;
102 hppa*) ninj parisc hppa;; 172 hppa*) ninj parisc hppa;;
173 i?86*) ninj i386 x86;;
103 ia64*) echo ia64;; 174 ia64*) echo ia64;;
104 m68*) echo m68k;; 175 m68*) echo m68k;;
105 mips*) echo mips;; 176 mips*) echo mips;;
106 powerpc64*) echo ppc64;; 177 nios2*) echo nios2;;
107 powerpc*) echo ppc;; 178 nios*) echo nios;;
108 sparc64*) ninj sparc64 sparc;; 179 powerpc*)
109 sparc*) echo sparc;; 180 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
181 # have been unified into simply 'powerpc', but until 2.6.16,
182 # ppc32 is still using ARCH="ppc" as default
183 if [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] && [[ ${type} == "kern" ]] ; then
184 echo powerpc
185 elif [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] && [[ ${type} == "kern" ]] ; then
186 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
187 echo powerpc
188 else
189 echo ppc
190 fi
191 elif [[ ${host} == powerpc64* ]] ; then
192 echo ppc64
193 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
194 ninj ppc64 ppc
195 else
196 echo ppc
197 fi
198 ;;
110 s390*) echo s390;; 199 s390*) echo s390;;
111 sh64*) ninj sh64 sh;; 200 sh64*) ninj sh64 sh;;
112 sh*) echo sh;; 201 sh*) echo sh;;
113 i?86*) ninj i386 x86;; 202 sparc64*) ninj sparc64 sparc;;
203 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
204 && ninj sparc64 sparc \
205 || echo sparc
206 ;;
207 vax*) echo vax;;
208 x86_64*) ninj x86_64 amd64;;
209
210 # since our usage of tc-arch is largely concerned with
211 # normalizing inputs for testing ${CTARGET}, let's filter
212 # other cross targets (mingw and such) into the unknown.
213 *) echo unknown;;
214 esac
215}
216# @FUNCTION: tc-arch-kernel
217# @USAGE: [toolchain prefix]
218# @RETURN: name of the kernel arch according to the compiler target
219tc-arch-kernel() {
220 tc-ninja_magic_to_arch kern "$@"
221}
222# @FUNCTION: tc-arch
223# @USAGE: [toolchain prefix]
224# @RETURN: name of the portage arch according to the compiler target
225tc-arch() {
226 tc-ninja_magic_to_arch portage "$@"
227}
228
229tc-endian() {
230 local host=$1
231 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
232 host=${host%%-*}
233
234 case ${host} in
235 alpha*) echo big;;
236 arm*b*) echo big;;
237 arm*) echo little;;
238 cris*) echo little;;
239 hppa*) echo big;;
240 i?86*) echo little;;
241 ia64*) echo little;;
242 m68*) echo big;;
243 mips*l*) echo little;;
244 mips*) echo big;;
245 powerpc*) echo big;;
246 s390*) echo big;;
247 sh*b*) echo big;;
248 sh*) echo little;;
249 sparc*) echo big;;
250 x86_64*) echo little;;
114 *) echo wtf;; 251 *) echo wtf;;
115 esac 252 esac
116} 253}
117tc-arch-kernel() {
118 tc-ninja_magic_to_arch kern $@
119}
120tc-arch() {
121 tc-ninja_magic_to_arch portage $@
122}
123tc-endian() {
124 local host=$1
125 [[ -z ${host} ]] && host=${CHOST}
126 254
127 case ${host} in 255# @FUNCTION: gcc-fullversion
128 alpha*) echo big;; 256# @RETURN: compiler version (major.minor.micro: [3.4.6])
129 x86_64*) echo little;;
130 arm*eb-*) echo big;;
131 arm*) echo little;;
132 hppa*) echo big;;
133 ia64*) echo little;;
134 m68*) echo big;;
135 mips*el-*) echo little;;
136 mips*) echo big;;
137 powerpc*) echo big;;
138 sparc*) echo big;;
139 s390*) echo big;;
140 sh*el-) echo little;;
141 sh*) echo big;;
142 i?86*) echo little;;
143 *) echo wtf;;
144 esac
145}
146
147# Returns the version as by `$CC -dumpversion`
148gcc-fullversion() { 257gcc-fullversion() {
149 echo "$($(tc-getCC) -dumpversion)" 258 $(tc-getCC "$@") -dumpversion
150} 259}
151# Returns the version, but only the <major>.<minor> 260# @FUNCTION: gcc-version
261# @RETURN: compiler version (major.minor: [3.4].6)
152gcc-version() { 262gcc-version() {
153 echo "$(gcc-fullversion | cut -f1,2 -d.)" 263 gcc-fullversion "$@" | cut -f1,2 -d.
154} 264}
155# Returns the Major version 265# @FUNCTION: gcc-major-version
266# @RETURN: major compiler version (major: [3].4.6)
156gcc-major-version() { 267gcc-major-version() {
157 echo "$(gcc-version | cut -f1 -d.)" 268 gcc-version "$@" | cut -f1 -d.
158} 269}
159# Returns the Minor version 270# @FUNCTION: gcc-minor-version
271# @RETURN: minor compiler version (minor: 3.[4].6)
160gcc-minor-version() { 272gcc-minor-version() {
161 echo "$(gcc-version | cut -f2 -d.)" 273 gcc-version "$@" | cut -f2 -d.
162} 274}
163# Returns the Micro version 275# @FUNCTION: gcc-micro-version
276# @RETURN: micro compiler version (micro: 3.4.[6])
164gcc-micro-version() { 277gcc-micro-version() {
165 echo "$(gcc-fullversion | cut -f3 -d.)" 278 gcc-fullversion "$@" | cut -f3 -d. | cut -f1 -d-
166} 279}
280
281# Returns the installation directory - internal toolchain
282# function for use by _gcc-specs-exists (for flag-o-matic).
283_gcc-install-dir() {
284 echo "$($(tc-getCC) -print-search-dirs 2> /dev/null |\
285 awk '$1=="install:" {print $2}')"
286}
287# Returns true if the indicated specs file exists - internal toolchain
288# function for use by flag-o-matic.
289_gcc-specs-exists() {
290 [[ -f $(_gcc-install-dir)/$1 ]]
291}
292
293# Returns requested gcc specs directive unprocessed - for used by
294# gcc-specs-directive()
295# Note; later specs normally overwrite earlier ones; however if a later
296# spec starts with '+' then it appends.
297# gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
298# as "Reading <file>", in order. Strictly speaking, if there's a
299# $(gcc_install_dir)/specs, the built-in specs aren't read, however by
300# the same token anything from 'gcc -dumpspecs' is overridden by
301# the contents of $(gcc_install_dir)/specs so the result is the
302# same either way.
303_gcc-specs-directive_raw() {
304 local cc=$(tc-getCC)
305 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
306 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
307'BEGIN { pspec=""; spec=""; outside=1 }
308$1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
309 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
310 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
311 { spec=spec $0 }
312END { print spec }'
313 return 0
314}
315
316# Return the requested gcc specs directive, with all included
317# specs expanded.
318# Note, it does not check for inclusion loops, which cause it
319# to never finish - but such loops are invalid for gcc and we're
320# assuming gcc is operational.
321gcc-specs-directive() {
322 local directive subdname subdirective
323 directive="$(_gcc-specs-directive_raw $1)"
324 while [[ ${directive} == *%\(*\)* ]]; do
325 subdname=${directive/*%\(}
326 subdname=${subdname/\)*}
327 subdirective="$(_gcc-specs-directive_raw ${subdname})"
328 directive="${directive//\%(${subdname})/${subdirective}}"
329 done
330 echo "${directive}"
331 return 0
332}
333
334# Returns true if gcc sets relro
335gcc-specs-relro() {
336 local directive
337 directive=$(gcc-specs-directive link_command)
338 return $([[ ${directive/\{!norelro:} != ${directive} ]])
339}
340# Returns true if gcc sets now
341gcc-specs-now() {
342 local directive
343 directive=$(gcc-specs-directive link_command)
344 return $([[ ${directive/\{!nonow:} != ${directive} ]])
345}
346# Returns true if gcc builds PIEs
347gcc-specs-pie() {
348 local directive
349 directive=$(gcc-specs-directive cc1)
350 return $([[ ${directive/\{!nopie:} != ${directive} ]])
351}
352# Returns true if gcc builds with the stack protector
353gcc-specs-ssp() {
354 local directive
355 directive=$(gcc-specs-directive cc1)
356 return $([[ ${directive/\{!fno-stack-protector:} != ${directive} ]])
357}
358# Returns true if gcc upgrades fstack-protector to fstack-protector-all
359gcc-specs-ssp-to-all() {
360 local directive
361 directive=$(gcc-specs-directive cc1)
362 return $([[ ${directive/\{!fno-stack-protector-all:} != ${directive} ]])
363}
364
365
366# @FUNCTION: gen_usr_ldscript
367# @USAGE: <list of libs to create linker scripts for>
368# @DESCRIPTION:
369# This function generate linker scripts in /usr/lib for dynamic
370# libs in /lib. This is to fix linking problems when you have
371# the .so in /lib, and the .a in /usr/lib. What happens is that
372# in some cases when linking dynamic, the .a in /usr/lib is used
373# instead of the .so in /lib due to gcc/libtool tweaking ld's
374# library search path. This causes many builds to fail.
375# See bug #4411 for more info.
376#
377# Note that you should in general use the unversioned name of
378# the library (libfoo.so), as ldconfig should usually update it
379# correctly to point to the latest version of the library present.
380gen_usr_ldscript() {
381 local lib libdir=$(get_libdir) output_format=""
382 # Just make sure it exists
383 dodir /usr/${libdir}
384
385 # OUTPUT_FORMAT gives hints to the linker as to what binary format
386 # is referenced ... makes multilib saner
387 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
388 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
389
390 for lib in "$@" ; do
391 if [[ ${USERLAND} == "Darwin" ]] ; then
392 ewarn "Not creating fake dynamic library for $lib on Darwin;"
393 ewarn "making a symlink instead."
394 dosym "/${libdir}/${lib}" "/usr/${libdir}/${lib}"
395 else
396 cat > "${D}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
397 /* GNU ld script
398 Since Gentoo has critical dynamic libraries
399 in /lib, and the static versions in /usr/lib,
400 we need to have a "fake" dynamic lib in /usr/lib,
401 otherwise we run into linking problems.
402
403 See bug http://bugs.gentoo.org/4411 for more info.
404 */
405 ${output_format}
406 GROUP ( /${libdir}/${lib} )
407 END_LDSCRIPT
408 fi
409 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
410 done
411}

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