/[gentoo-x86]/eclass/toolchain-funcs.eclass
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1# Copyright 1999-2005 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 1.45 2005/10/06 01:52:51 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.101 2010/08/20 15:04:11 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 multilib 16___ECLASS_RECUR_TOOLCHAIN_FUNCS="yes"
17[[ -z ${___ECLASS_RECUR_MULTILIB} ]] && inherit multilib
11 18
12DESCRIPTION="Based on the ${ECLASS} eclass" 19DESCRIPTION="Based on the ${ECLASS} eclass"
13 20
14tc-getPROG() { 21tc-getPROG() {
15 local var=$1 22 local var=$1
20 return 0 27 return 0
21 fi 28 fi
22 29
23 local search= 30 local search=
24 [[ -n $3 ]] && search=$(type -p "$3-${prog}") 31 [[ -n $3 ]] && search=$(type -p "$3-${prog}")
25 [[ -z ${search} && -n $(get_abi_CHOST) ]] && search=$(type -p "$(get_abi_CHOST)-${prog}")
26 [[ -z ${search} && -n ${CHOST} ]] && search=$(type -p "${CHOST}-${prog}") 32 [[ -z ${search} && -n ${CHOST} ]] && search=$(type -p "${CHOST}-${prog}")
27 [[ -n ${search} ]] && prog=${search##*/} 33 [[ -n ${search} ]] && prog=${search##*/}
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-getOBJCOPY
76# @USAGE: [toolchain prefix]
77# @RETURN: name of the object copier
78tc-getOBJCOPY() { tc-getPROG OBJCOPY objcopy "$@"; }
79# @FUNCTION: tc-getF77
80# @USAGE: [toolchain prefix]
81# @RETURN: name of the Fortran 77 compiler
48tc-getF77() { tc-getPROG F77 f77 "$@"; } 82tc-getF77() { tc-getPROG F77 gfortran "$@"; }
83# @FUNCTION: tc-getFC
84# @USAGE: [toolchain prefix]
85# @RETURN: name of the Fortran 90 compiler
86tc-getFC() { tc-getPROG FC gfortran "$@"; }
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 "$@"; } 90tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
91# @FUNCTION: tc-getPKG_CONFIG
92# @USAGE: [toolchain prefix]
93# @RETURN: name of the pkg-config tool
94tc-getPKG_CONFIG() { tc-getPROG PKG_CONFIG pkg-config "$@"; }
95# @FUNCTION: tc-getRC
96# @USAGE: [toolchain prefix]
97# @RETURN: name of the Windows resource compiler
98tc-getRC() { tc-getPROG RC windres "$@"; }
99# @FUNCTION: tc-getDLLWRAP
100# @USAGE: [toolchain prefix]
101# @RETURN: name of the Windows dllwrap utility
102tc-getDLLWRAP() { tc-getPROG DLLWRAP dllwrap "$@"; }
51 103
52# Returns the name of the C compiler for build 104# @FUNCTION: tc-getBUILD_CC
105# @USAGE: [toolchain prefix]
106# @RETURN: name of the C compiler for building binaries to run on the build machine
53tc-getBUILD_CC() { 107tc-getBUILD_CC() {
54 local v 108 local v
55 for v in CC_FOR_BUILD BUILD_CC HOSTCC ; do 109 for v in CC_FOR_BUILD BUILD_CC HOSTCC ; do
56 if [[ -n ${!v} ]] ; then 110 if [[ -n ${!v} ]] ; then
57 export BUILD_CC=${!v} 111 export BUILD_CC=${!v}
69 123
70 export BUILD_CC=${search} 124 export BUILD_CC=${search}
71 echo "${search}" 125 echo "${search}"
72} 126}
73 127
128# @FUNCTION: tc-export
129# @USAGE: <list of toolchain variables>
130# @DESCRIPTION:
74# Quick way to export a bunch of vars at once 131# Quick way to export a bunch of compiler vars at once.
75tc-export() { 132tc-export() {
76 local var 133 local var
77 for var in "$@" ; do 134 for var in "$@" ; do
135 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
78 eval tc-get${var} > /dev/null 136 eval tc-get${var} > /dev/null
79 done 137 done
80} 138}
81 139
82# A simple way to see if we're using a cross-compiler ... 140# @FUNCTION: tc-is-cross-compiler
141# @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
83tc-is-cross-compiler() { 142tc-is-cross-compiler() {
84 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]]) 143 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
144}
145
146# @FUNCTION: tc-is-softfloat
147# @DESCRIPTION:
148# See if this toolchain is a softfloat based one.
149# @CODE
150# The possible return values:
151# - only: the target is always softfloat (never had fpu)
152# - yes: the target should support softfloat
153# - no: the target doesn't support softfloat
154# @CODE
155# This allows us to react differently where packages accept
156# softfloat flags in the case where support is optional, but
157# rejects softfloat flags where the target always lacks an fpu.
158tc-is-softfloat() {
159 case ${CTARGET} in
160 bfin*|h8300*)
161 echo "only" ;;
162 *)
163 [[ ${CTARGET//_/-} == *-softfloat-* ]] \
164 && echo "yes" \
165 || echo "no"
166 ;;
167 esac
168}
169
170# @FUNCTION: tc-is-hardfloat
171# @DESCRIPTION:
172# See if this toolchain is a hardfloat based one.
173# @CODE
174# The possible return values:
175# - yes: the target should support hardfloat
176# - no: the target doesn't support hardfloat
177tc-is-hardfloat() {
178 [[ ${CTARGET//_/-} == *-hardfloat-* ]] \
179 && echo "yes" \
180 || echo "no"
181}
182
183# @FUNCTION: tc-is-static-only
184# @DESCRIPTION:
185# Return shell true if the target does not support shared libs, shell false
186# otherwise.
187tc-is-static-only() {
188 local host=${CTARGET:-${CHOST}}
189
190 # *MiNT doesn't have shared libraries, only platform so far
191 return $([[ ${host} == *-mint* ]])
192}
193
194# @FUNCTION: tc-has-openmp
195# @USAGE: [toolchain prefix]
196# @DESCRIPTION:
197# See if the toolchain supports OpenMP.
198tc-has-openmp() {
199 local base="${T}/test-tc-openmp"
200 cat <<-EOF > "${base}.c"
201 #include <omp.h>
202 int main() {
203 int nthreads, tid, ret = 0;
204 #pragma omp parallel private(nthreads, tid)
205 {
206 tid = omp_get_thread_num();
207 nthreads = omp_get_num_threads(); ret += tid + nthreads;
208 }
209 return ret;
210 }
211 EOF
212 $(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
213 local ret=$?
214 rm -f "${base}"*
215 return ${ret}
216}
217
218# @FUNCTION: tc-has-tls
219# @USAGE: [-s|-c|-l] [toolchain prefix]
220# @DESCRIPTION:
221# See if the toolchain supports thread local storage (TLS). Use -s to test the
222# compiler, -c to also test the assembler, and -l to also test the C library
223# (the default).
224tc-has-tls() {
225 local base="${T}/test-tc-tls"
226 cat <<-EOF > "${base}.c"
227 int foo(int *i) {
228 static __thread int j = 0;
229 return *i ? j : *i;
230 }
231 EOF
232 local flags
233 case $1 in
234 -s) flags="-S";;
235 -c) flags="-c";;
236 -l) ;;
237 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
238 esac
239 : ${flags:=-fPIC -shared -Wl,-z,defs}
240 [[ $1 == -* ]] && shift
241 $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
242 local ret=$?
243 rm -f "${base}"*
244 return ${ret}
85} 245}
86 246
87 247
88# Parse information from CBUILD/CHOST/CTARGET rather than 248# Parse information from CBUILD/CHOST/CTARGET rather than
89# use external variables from the profile. 249# use external variables from the profile.
94 local host=$2 254 local host=$2
95 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}} 255 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
96 256
97 case ${host} in 257 case ${host} in
98 alpha*) echo alpha;; 258 alpha*) echo alpha;;
99 x86_64*) ninj x86_64 amd64;;
100 arm*) echo arm;; 259 arm*) echo arm;;
101 thumb*) echo arm;; 260 avr*) ninj avr32 avr;;
261 bfin*) ninj blackfin bfin;;
262 cris*) echo cris;;
102 hppa*) ninj parisc hppa;; 263 hppa*) ninj parisc hppa;;
264 i?86*)
265 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
266 # trees have been unified into 'x86'.
267 # FreeBSD still uses i386
268 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
269 echo i386
270 else
271 echo x86
272 fi
273 ;;
103 ia64*) echo ia64;; 274 ia64*) echo ia64;;
104 m68*) echo m68k;; 275 m68*) echo m68k;;
105 mips*) echo mips;; 276 mips*) echo mips;;
106 powerpc64*) echo ppc64;; 277 nios2*) echo nios2;;
278 nios*) echo nios;;
279 powerpc*)
280 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
281 # have been unified into simply 'powerpc', but until 2.6.16,
282 # ppc32 is still using ARCH="ppc" as default
283 if [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] && [[ ${type} == "kern" ]] ; then
284 echo powerpc
285 elif [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] && [[ ${type} == "kern" ]] ; then
286 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
287 echo powerpc
288 else
289 echo ppc
290 fi
291 elif [[ ${host} == powerpc64* ]] ; then
292 echo ppc64
107 powerpc*) [[ ${PROFILE_ARCH} == "ppc64" ]] \ 293 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
108 && ninj ppc64 ppc \ 294 ninj ppc64 ppc
295 else
109 || echo ppc 296 echo ppc
297 fi
110 ;; 298 ;;
299 s390*) echo s390;;
300 sh64*) ninj sh64 sh;;
301 sh*) echo sh;;
111 sparc64*) ninj sparc64 sparc;; 302 sparc64*) ninj sparc64 sparc;;
112 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \ 303 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
113 && ninj sparc64 sparc \ 304 && ninj sparc64 sparc \
114 || echo sparc 305 || echo sparc
115 ;; 306 ;;
116 s390*) echo s390;; 307 vax*) echo vax;;
117 sh64*) ninj sh64 sh;; 308 x86_64*)
118 sh*) echo sh;; 309 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
119 i?86*) ninj i386 x86;; 310 # trees have been unified into 'x86'.
120 *) echo ${ARCH};; 311 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
312 echo x86
313 else
314 ninj x86_64 amd64
315 fi
316 ;;
317
318 # since our usage of tc-arch is largely concerned with
319 # normalizing inputs for testing ${CTARGET}, let's filter
320 # other cross targets (mingw and such) into the unknown.
321 *) echo unknown;;
121 esac 322 esac
122} 323}
324# @FUNCTION: tc-arch-kernel
325# @USAGE: [toolchain prefix]
326# @RETURN: name of the kernel arch according to the compiler target
123tc-arch-kernel() { 327tc-arch-kernel() {
124 tc-ninja_magic_to_arch kern $@ 328 tc-ninja_magic_to_arch kern "$@"
125} 329}
330# @FUNCTION: tc-arch
331# @USAGE: [toolchain prefix]
332# @RETURN: name of the portage arch according to the compiler target
126tc-arch() { 333tc-arch() {
127 tc-ninja_magic_to_arch portage $@ 334 tc-ninja_magic_to_arch portage "$@"
128} 335}
336
129tc-endian() { 337tc-endian() {
130 local host=$1 338 local host=$1
131 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}} 339 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
132 host=${host%%-*} 340 host=${host%%-*}
133 341
134 case ${host} in 342 case ${host} in
135 alpha*) echo big;; 343 alpha*) echo big;;
136 x86_64*) echo little;;
137 arm*b*) echo big;; 344 arm*b*) echo big;;
138 arm*) echo little;; 345 arm*) echo little;;
139 thumb*) echo little;; 346 cris*) echo little;;
140 hppa*) echo big;; 347 hppa*) echo big;;
348 i?86*) echo little;;
141 ia64*) echo little;; 349 ia64*) echo little;;
142 m68*) echo big;; 350 m68*) echo big;;
143 mips*l*) echo little;; 351 mips*l*) echo little;;
144 mips*) echo big;; 352 mips*) echo big;;
145 powerpc*) echo big;; 353 powerpc*) echo big;;
146 sparc*) echo big;;
147 s390*) echo big;; 354 s390*) echo big;;
148 sh*b*) echo big;; 355 sh*b*) echo big;;
149 sh*) echo little;; 356 sh*) echo little;;
357 sparc*) echo big;;
150 i?86*) echo little;; 358 x86_64*) echo little;;
151 *) echo wtf;; 359 *) echo wtf;;
152 esac 360 esac
153} 361}
154 362
155# Returns the version as by `$CC -dumpversion` 363# @FUNCTION: gcc-fullversion
364# @RETURN: compiler version (major.minor.micro: [3.4.6])
156gcc-fullversion() { 365gcc-fullversion() {
157 echo "$($(tc-getCC) -dumpversion)" 366 $(tc-getCC "$@") -dumpversion
158} 367}
159# Returns the version, but only the <major>.<minor> 368# @FUNCTION: gcc-version
369# @RETURN: compiler version (major.minor: [3.4].6)
160gcc-version() { 370gcc-version() {
161 echo "$(gcc-fullversion | cut -f1,2 -d.)" 371 gcc-fullversion "$@" | cut -f1,2 -d.
162} 372}
163# Returns the Major version 373# @FUNCTION: gcc-major-version
374# @RETURN: major compiler version (major: [3].4.6)
164gcc-major-version() { 375gcc-major-version() {
165 echo "$(gcc-version | cut -f1 -d.)" 376 gcc-version "$@" | cut -f1 -d.
166} 377}
167# Returns the Minor version 378# @FUNCTION: gcc-minor-version
379# @RETURN: minor compiler version (minor: 3.[4].6)
168gcc-minor-version() { 380gcc-minor-version() {
169 echo "$(gcc-version | cut -f2 -d.)" 381 gcc-version "$@" | cut -f2 -d.
170} 382}
171# Returns the Micro version 383# @FUNCTION: gcc-micro-version
384# @RETURN: micro compiler version (micro: 3.4.[6])
172gcc-micro-version() { 385gcc-micro-version() {
173 echo "$(gcc-fullversion | cut -f3 -d. | cut -f1 -d-)" 386 gcc-fullversion "$@" | cut -f3 -d. | cut -f1 -d-
174} 387}
175 388
389# Returns the installation directory - internal toolchain
390# function for use by _gcc-specs-exists (for flag-o-matic).
391_gcc-install-dir() {
392 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
393 awk '$1=="install:" {print $2}')"
394}
395# Returns true if the indicated specs file exists - internal toolchain
396# function for use by flag-o-matic.
397_gcc-specs-exists() {
398 [[ -f $(_gcc-install-dir)/$1 ]]
399}
400
401# Returns requested gcc specs directive unprocessed - for used by
402# gcc-specs-directive()
403# Note; later specs normally overwrite earlier ones; however if a later
404# spec starts with '+' then it appends.
405# gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
406# as "Reading <file>", in order. Strictly speaking, if there's a
407# $(gcc_install_dir)/specs, the built-in specs aren't read, however by
408# the same token anything from 'gcc -dumpspecs' is overridden by
409# the contents of $(gcc_install_dir)/specs so the result is the
410# same either way.
411_gcc-specs-directive_raw() {
412 local cc=$(tc-getCC)
413 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
414 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
415'BEGIN { pspec=""; spec=""; outside=1 }
416$1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
417 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
418 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
419 { spec=spec $0 }
420END { print spec }'
421 return 0
422}
423
176# Returns requested gcc specs directive 424# Return the requested gcc specs directive, with all included
177# Note; if a spec exists more than once (e.g. in more than one specs file) 425# specs expanded.
178# the last one read is the active definition - i.e. they do not accumulate, 426# Note, it does not check for inclusion loops, which cause it
179# each new definition replaces any previous definition. 427# to never finish - but such loops are invalid for gcc and we're
428# assuming gcc is operational.
180gcc-specs-directive() { 429gcc-specs-directive() {
181 local specfiles=$($(tc-getCC) -v 2>&1 | grep "^Reading" | awk '{print $NF}') 430 local directive subdname subdirective
182 [[ -z ${specfiles} ]] && return 0 431 directive="$(_gcc-specs-directive_raw $1)"
183 awk -v spec=$1 \ 432 while [[ ${directive} == *%\(*\)* ]]; do
184'BEGIN { sstr=""; outside=1 } 433 subdname=${directive/*%\(}
185 $1=="*"spec":" { sstr=""; outside=0; next } 434 subdname=${subdname/\)*}
186 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next } 435 subdirective="$(_gcc-specs-directive_raw ${subdname})"
187 { sstr=sstr $0 } 436 directive="${directive//\%(${subdname})/${subdirective}}"
188END { print sstr }' ${specfiles} 437 done
438 echo "${directive}"
439 return 0
189} 440}
190 441
191# Returns true if gcc sets relro 442# Returns true if gcc sets relro
192gcc-specs-relro() { 443gcc-specs-relro() {
193 local directive 444 local directive
194 directive=$(gcc-specs-directive link_command) 445 directive=$(gcc-specs-directive link_command)
195 return $([[ ${directive/\{!norelro:} != ${directive} ]]) 446 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
196} 447}
197# Returns true if gcc sets now 448# Returns true if gcc sets now
198gcc-specs-now() { 449gcc-specs-now() {
199 local directive 450 local directive
200 directive=$(gcc-specs-directive link_command) 451 directive=$(gcc-specs-directive link_command)
201 return $([[ ${directive/\{!nonow:} != ${directive} ]]) 452 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
202} 453}
203# Returns true if gcc builds PIEs 454# Returns true if gcc builds PIEs
204gcc-specs-pie() { 455gcc-specs-pie() {
205 local directive 456 local directive
206 directive=$(gcc-specs-directive cc1) 457 directive=$(gcc-specs-directive cc1)
207 return $([[ ${directive/\{!nopie:} != ${directive} ]]) 458 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
208} 459}
209# Returns true if gcc builds with the stack protector 460# Returns true if gcc builds with the stack protector
210gcc-specs-ssp() { 461gcc-specs-ssp() {
211 local directive 462 local directive
212 directive=$(gcc-specs-directive cc1) 463 directive=$(gcc-specs-directive cc1)
213 return $([[ ${directive/\{!fno-stack-protector:} != ${directive} ]]) 464 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
214} 465}
466# Returns true if gcc upgrades fstack-protector to fstack-protector-all
467gcc-specs-ssp-to-all() {
468 local directive
469 directive=$(gcc-specs-directive cc1)
470 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
471}
472# Returns true if gcc builds with fno-strict-overflow
473gcc-specs-nostrict() {
474 local directive
475 directive=$(gcc-specs-directive cc1)
476 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
477}
478
479
480# @FUNCTION: gen_usr_ldscript
481# @USAGE: [-a] <list of libs to create linker scripts for>
482# @DESCRIPTION:
483# This function generate linker scripts in /usr/lib for dynamic
484# libs in /lib. This is to fix linking problems when you have
485# the .so in /lib, and the .a in /usr/lib. What happens is that
486# in some cases when linking dynamic, the .a in /usr/lib is used
487# instead of the .so in /lib due to gcc/libtool tweaking ld's
488# library search path. This causes many builds to fail.
489# See bug #4411 for more info.
490#
491# Note that you should in general use the unversioned name of
492# the library (libfoo.so), as ldconfig should usually update it
493# correctly to point to the latest version of the library present.
494gen_usr_ldscript() {
495 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
496 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
497
498 tc-is-static-only && return
499
500 # Just make sure it exists
501 dodir /usr/${libdir}
502
503 if [[ $1 == "-a" ]] ; then
504 auto=true
505 shift
506 dodir /${libdir}
507 fi
508
509 # OUTPUT_FORMAT gives hints to the linker as to what binary format
510 # is referenced ... makes multilib saner
511 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
512 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
513
514 for lib in "$@" ; do
515 local tlib
516 if ${auto} ; then
517 lib="lib${lib}${suffix}"
518 else
519 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
520 # This especially is for AIX where $(get_libname) can return ".a",
521 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
522 [[ -r ${ED}/${libdir}/${lib} ]] || continue
523 #TODO: better die here?
524 fi
525
526 case ${CTARGET:-${CHOST}} in
527 *-darwin*)
528 if ${auto} ; then
529 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
530 else
531 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
532 fi
533 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
534 tlib=${tlib##*/}
535
536 if ${auto} ; then
537 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
538 # some install_names are funky: they encode a version
539 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
540 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
541 fi
542 rm -f "${ED}"/${libdir}/${lib}
543 fi
544
545 # Mach-O files have an id, which is like a soname, it tells how
546 # another object linking against this lib should reference it.
547 # Since we moved the lib from usr/lib into lib this reference is
548 # wrong. Hence, we update it here. We don't configure with
549 # libdir=/lib because that messes up libtool files.
550 # Make sure we don't lose the specific version, so just modify the
551 # existing install_name
552 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
553 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
554 local nowrite=yes
555 fi
556 install_name_tool \
557 -id "${EPREFIX}"/${libdir}/${tlib} \
558 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
559 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
560 # Now as we don't use GNU binutils and our linker doesn't
561 # understand linker scripts, just create a symlink.
562 pushd "${ED}/usr/${libdir}" > /dev/null
563 ln -snf "../../${libdir}/${tlib}" "${lib}"
564 popd > /dev/null
565 ;;
566 *-aix*|*-irix*|*64*-hpux*|*-interix*|*-winnt*)
567 if ${auto} ; then
568 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
569 # no way to retrieve soname on these platforms (?)
570 tlib=$(readlink "${ED}"/${libdir}/${lib})
571 tlib=${tlib##*/}
572 if [[ -z ${tlib} ]] ; then
573 # ok, apparently was not a symlink, don't remove it and
574 # just link to it
575 tlib=${lib}
576 else
577 rm -f "${ED}"/${libdir}/${lib}
578 fi
579 else
580 tlib=${lib}
581 fi
582
583 # we don't have GNU binutils on these platforms, so we symlink
584 # instead, which seems to work fine. Keep it relative, otherwise
585 # we break some QA checks in Portage
586 # on interix, the linker scripts would work fine in _most_
587 # situations. if a library links to such a linker script the
588 # absolute path to the correct library is inserted into the binary,
589 # which is wrong, since anybody linking _without_ libtool will miss
590 # some dependencies, since the stupid linker cannot find libraries
591 # hardcoded with absolute paths (as opposed to the loader, which
592 # seems to be able to do this).
593 # this has been seen while building shared-mime-info which needs
594 # libxml2, but links without libtool (and does not add libz to the
595 # command line by itself).
596 pushd "${ED}/usr/${libdir}" > /dev/null
597 ln -snf "../../${libdir}/${tlib}" "${lib}"
598 popd > /dev/null
599 ;;
600 hppa*-hpux*) # PA-RISC 32bit (SOM) only, others (ELF) match *64*-hpux* above.
601 if ${auto} ; then
602 tlib=$(chatr "${ED}"/usr/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
603 [[ -z ${tlib} ]] && tlib=${lib}
604 tlib=${tlib##*/} # 'internal name' can have a path component
605 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
606 # some SONAMEs are funky: they encode a version before the .so
607 if [[ ${tlib} != ${lib}* ]] ; then
608 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
609 fi
610 [[ ${tlib} != ${lib} ]] &&
611 rm -f "${ED}"/${libdir}/${lib}
612 else
613 tlib=$(chatr "${ED}"/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
614 [[ -z ${tlib} ]] && tlib=${lib}
615 tlib=${tlib##*/} # 'internal name' can have a path component
616 fi
617 pushd "${ED}"/usr/${libdir} >/dev/null
618 ln -snf "../../${libdir}/${tlib}" "${lib}"
619 # need the internal name in usr/lib too, to be available at runtime
620 # when linked with /path/to/lib.sl (hardcode_direct_absolute=yes)
621 [[ ${tlib} != ${lib} ]] &&
622 ln -snf "../../${libdir}/${tlib}" "${tlib}"
623 popd >/dev/null
624 ;;
625 *)
626 if ${auto} ; then
627 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
628 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
629 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
630 # some SONAMEs are funky: they encode a version before the .so
631 if [[ ${tlib} != ${lib}* ]] ; then
632 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
633 fi
634 rm -f "${ED}"/${libdir}/${lib}
635 else
636 tlib=${lib}
637 fi
638 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
639 /* GNU ld script
640 Since Gentoo has critical dynamic libraries in /lib, and the static versions
641 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
642 run into linking problems. This "fake" dynamic lib is a linker script that
643 redirects the linker to the real lib. And yes, this works in the cross-
644 compiling scenario as the sysroot-ed linker will prepend the real path.
645
646 See bug http://bugs.gentoo.org/4411 for more info.
647 */
648 ${output_format}
649 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
650 END_LDSCRIPT
651 ;;
652 esac
653 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
654 done
655}

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