/[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 1.19 2005/01/10 02:41:58 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.78 2008/07/03 05:26:47 dberkholz 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}")
32 [[ -z ${search} && -n ${CHOST} ]] && search=$(type -p "${CHOST}-${prog}")
28 [[ -n ${search} ]] && prog=${search##*/} 33 [[ -n ${search} ]] && prog=${search##*/}
29 fi
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
78 eval tc-get${var} 119 eval tc-get${var} > /dev/null
79 done 120 done
80} 121}
81 122
82# A simple way to see if we're using a cross-compiler ... 123# @FUNCTION: tc-is-cross-compiler
124# @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
83tc-is-cross-compiler() { 125tc-is-cross-compiler() {
84 if [[ -n ${CBUILD} ]] ; then
85 return $([[ ${CBUILD} != ${CHOST} ]]) 126 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
86 fi
87 return 1
88} 127}
89 128
129# @FUNCTION: tc-is-softfloat
130# @DESCRIPTION:
131# See if this toolchain is a softfloat based one.
132# @CODE
133# The possible return values:
134# - only: the target is always softfloat (never had fpu)
135# - yes: the target should support softfloat
136# - no: the target should support hardfloat
137# @CODE
138# This allows us to react differently where packages accept
139# softfloat flags in the case where support is optional, but
140# rejects softfloat flags where the target always lacks an fpu.
141tc-is-softfloat() {
142 case ${CTARGET} in
143 bfin*|h8300*)
144 echo "only" ;;
145 *)
146 [[ ${CTARGET//_/-} == *-softfloat-* ]] \
147 && echo "yes" \
148 || echo "no"
149 ;;
150 esac
151}
90 152
91# Translate a CBUILD/CHOST/CTARGET into the kernel/portage 153# Parse information from CBUILD/CHOST/CTARGET rather than
92# equivalent of $ARCH 154# use external variables from the profile.
93ninja_magic_to_arch() { 155tc-ninja_magic_to_arch() {
94ninj() { [[ ${type} = "kern" ]] && echo $1 || echo $2 ; } 156ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
95 157
96 local type=$1 158 local type=$1
97 local host=$2 159 local host=$2
160 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
98 161
99 case ${host} in 162 case ${host} in
100 alpha*) echo alpha;; 163 alpha*) echo alpha;;
101 x86_64*) ninj x86_64 amd64;;
102 arm*) echo arm;; 164 arm*) echo arm;;
165 avr*) ninj avr32 avr;;
166 bfin*) ninj blackfin bfin;;
167 cris*) echo cris;;
103 hppa*) ninj parisc hppa;; 168 hppa*) ninj parisc hppa;;
169 i?86*)
170 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
171 # trees have been unified into 'x86'.
172 # FreeBSD still uses i386
173 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
174 echo i386
175 else
176 echo x86
177 fi
178 ;;
104 ia64*) echo ia64;; 179 ia64*) echo ia64;;
180 m68*) echo m68k;;
105 mips*) echo mips;; 181 mips*) echo mips;;
106 powerpc64*) echo ppc64;; 182 nios2*) echo nios2;;
107 powerpc*) echo ppc;; 183 nios*) echo nios;;
108 sparc64*) ninj sparc64 sparc;; 184 powerpc*)
109 sparc*) echo sparc;; 185 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
186 # have been unified into simply 'powerpc', but until 2.6.16,
187 # ppc32 is still using ARCH="ppc" as default
188 if [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] && [[ ${type} == "kern" ]] ; then
189 echo powerpc
190 elif [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] && [[ ${type} == "kern" ]] ; then
191 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
192 echo powerpc
193 else
194 echo ppc
195 fi
196 elif [[ ${host} == powerpc64* ]] ; then
197 echo ppc64
198 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
199 ninj ppc64 ppc
200 else
201 echo ppc
202 fi
203 ;;
110 s390*) echo s390;; 204 s390*) echo s390;;
111 sh64*) ninj sh64 sh;; 205 sh64*) ninj sh64 sh;;
112 sh*) echo sh;; 206 sh*) echo sh;;
207 sparc64*) ninj sparc64 sparc;;
208 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
209 && ninj sparc64 sparc \
210 || echo sparc
211 ;;
212 vax*) echo vax;;
213 x86_64*)
214 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
215 # trees have been unified into 'x86'.
216 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
217 echo x86
218 else
219 ninj x86_64 amd64
220 fi
221 ;;
222
223 # since our usage of tc-arch is largely concerned with
224 # normalizing inputs for testing ${CTARGET}, let's filter
225 # other cross targets (mingw and such) into the unknown.
226 *) echo unknown;;
227 esac
228}
229# @FUNCTION: tc-arch-kernel
230# @USAGE: [toolchain prefix]
231# @RETURN: name of the kernel arch according to the compiler target
232tc-arch-kernel() {
233 tc-ninja_magic_to_arch kern "$@"
234}
235# @FUNCTION: tc-arch
236# @USAGE: [toolchain prefix]
237# @RETURN: name of the portage arch according to the compiler target
238tc-arch() {
239 tc-ninja_magic_to_arch portage "$@"
240}
241
242tc-endian() {
243 local host=$1
244 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
245 host=${host%%-*}
246
247 case ${host} in
248 alpha*) echo big;;
249 arm*b*) echo big;;
250 arm*) echo little;;
251 cris*) echo little;;
252 hppa*) echo big;;
113 i?86*) echo x86;; 253 i?86*) echo little;;
254 ia64*) echo little;;
255 m68*) echo big;;
256 mips*l*) echo little;;
257 mips*) echo big;;
258 powerpc*) echo big;;
259 s390*) echo big;;
260 sh*b*) echo big;;
261 sh*) echo little;;
262 sparc*) echo big;;
263 x86_64*) echo little;;
114 *) echo wtf;; 264 *) echo wtf;;
115 esac 265 esac
116} 266}
117host_to_arch_kernel() {
118 ninja_magic_to_arch kern $@
119}
120host_to_arch_portage() {
121 ninja_magic_to_arch portage $@
122}
123 267
124 268# @FUNCTION: gcc-fullversion
125# Returns the version as by `$CC -dumpversion` 269# @RETURN: compiler version (major.minor.micro: [3.4.6])
126gcc-fullversion() { 270gcc-fullversion() {
127 echo "$($(tc-getCC) -dumpversion)" 271 $(tc-getCC "$@") -dumpversion
128} 272}
129# Returns the version, but only the <major>.<minor> 273# @FUNCTION: gcc-version
274# @RETURN: compiler version (major.minor: [3.4].6)
130gcc-version() { 275gcc-version() {
131 echo "$(gcc-fullversion | cut -f1,2 -d.)" 276 gcc-fullversion "$@" | cut -f1,2 -d.
132} 277}
133# Returns the Major version 278# @FUNCTION: gcc-major-version
279# @RETURN: major compiler version (major: [3].4.6)
134gcc-major-version() { 280gcc-major-version() {
135 echo "$(gcc-version | cut -f1 -d.)" 281 gcc-version "$@" | cut -f1 -d.
136} 282}
137# Returns the Minor version 283# @FUNCTION: gcc-minor-version
284# @RETURN: minor compiler version (minor: 3.[4].6)
138gcc-minor-version() { 285gcc-minor-version() {
139 echo "$(gcc-version | cut -f2 -d.)" 286 gcc-version "$@" | cut -f2 -d.
140} 287}
141# Returns the Micro version 288# @FUNCTION: gcc-micro-version
289# @RETURN: micro compiler version (micro: 3.4.[6])
142gcc-micro-version() { 290gcc-micro-version() {
143 echo "$(gcc-fullversion | cut -f3 -d.)" 291 gcc-fullversion "$@" | cut -f3 -d. | cut -f1 -d-
144} 292}
293
294# Returns the installation directory - internal toolchain
295# function for use by _gcc-specs-exists (for flag-o-matic).
296_gcc-install-dir() {
297 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
298 awk '$1=="install:" {print $2}')"
299}
300# Returns true if the indicated specs file exists - internal toolchain
301# function for use by flag-o-matic.
302_gcc-specs-exists() {
303 [[ -f $(_gcc-install-dir)/$1 ]]
304}
305
306# Returns requested gcc specs directive unprocessed - for used by
307# gcc-specs-directive()
308# Note; later specs normally overwrite earlier ones; however if a later
309# spec starts with '+' then it appends.
310# gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
311# as "Reading <file>", in order. Strictly speaking, if there's a
312# $(gcc_install_dir)/specs, the built-in specs aren't read, however by
313# the same token anything from 'gcc -dumpspecs' is overridden by
314# the contents of $(gcc_install_dir)/specs so the result is the
315# same either way.
316_gcc-specs-directive_raw() {
317 local cc=$(tc-getCC)
318 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
319 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
320'BEGIN { pspec=""; spec=""; outside=1 }
321$1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
322 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
323 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
324 { spec=spec $0 }
325END { print spec }'
326 return 0
327}
328
329# Return the requested gcc specs directive, with all included
330# specs expanded.
331# Note, it does not check for inclusion loops, which cause it
332# to never finish - but such loops are invalid for gcc and we're
333# assuming gcc is operational.
334gcc-specs-directive() {
335 local directive subdname subdirective
336 directive="$(_gcc-specs-directive_raw $1)"
337 while [[ ${directive} == *%\(*\)* ]]; do
338 subdname=${directive/*%\(}
339 subdname=${subdname/\)*}
340 subdirective="$(_gcc-specs-directive_raw ${subdname})"
341 directive="${directive//\%(${subdname})/${subdirective}}"
342 done
343 echo "${directive}"
344 return 0
345}
346
347# Returns true if gcc sets relro
348gcc-specs-relro() {
349 local directive
350 directive=$(gcc-specs-directive link_command)
351 return $([[ ${directive/\{!norelro:} != ${directive} ]])
352}
353# Returns true if gcc sets now
354gcc-specs-now() {
355 local directive
356 directive=$(gcc-specs-directive link_command)
357 return $([[ ${directive/\{!nonow:} != ${directive} ]])
358}
359# Returns true if gcc builds PIEs
360gcc-specs-pie() {
361 local directive
362 directive=$(gcc-specs-directive cc1)
363 return $([[ ${directive/\{!nopie:} != ${directive} ]])
364}
365# Returns true if gcc builds with the stack protector
366gcc-specs-ssp() {
367 local directive
368 directive=$(gcc-specs-directive cc1)
369 return $([[ ${directive/\{!fno-stack-protector:} != ${directive} ]])
370}
371# Returns true if gcc upgrades fstack-protector to fstack-protector-all
372gcc-specs-ssp-to-all() {
373 local directive
374 directive=$(gcc-specs-directive cc1)
375 return $([[ ${directive/\{!fno-stack-protector-all:} != ${directive} ]])
376}
377
378
379# @FUNCTION: gen_usr_ldscript
380# @USAGE: <list of libs to create linker scripts for>
381# @DESCRIPTION:
382# This function generate linker scripts in /usr/lib for dynamic
383# libs in /lib. This is to fix linking problems when you have
384# the .so in /lib, and the .a in /usr/lib. What happens is that
385# in some cases when linking dynamic, the .a in /usr/lib is used
386# instead of the .so in /lib due to gcc/libtool tweaking ld's
387# library search path. This causes many builds to fail.
388# See bug #4411 for more info.
389#
390# Note that you should in general use the unversioned name of
391# the library (libfoo.so), as ldconfig should usually update it
392# correctly to point to the latest version of the library present.
393gen_usr_ldscript() {
394 local lib libdir=$(get_libdir) output_format=""
395 # Just make sure it exists
396 dodir /usr/${libdir}
397
398 # OUTPUT_FORMAT gives hints to the linker as to what binary format
399 # is referenced ... makes multilib saner
400 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
401 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
402
403 for lib in "$@" ; do
404 if [[ ${USERLAND} == "Darwin" ]] ; then
405 ewarn "Not creating fake dynamic library for $lib on Darwin;"
406 ewarn "making a symlink instead."
407 dosym "/${libdir}/${lib}" "/usr/${libdir}/${lib}"
408 else
409 cat > "${D}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
410 /* GNU ld script
411 Since Gentoo has critical dynamic libraries
412 in /lib, and the static versions in /usr/lib,
413 we need to have a "fake" dynamic lib in /usr/lib,
414 otherwise we run into linking problems.
415
416 See bug http://bugs.gentoo.org/4411 for more info.
417 */
418 ${output_format}
419 GROUP ( /${libdir}/${lib} )
420 END_LDSCRIPT
421 fi
422 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
423 done
424}

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