/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.107 - (hide annotations) (download)
Mon Sep 12 21:42:08 2011 UTC (2 years, 7 months ago) by vapier
Branch: MAIN
Changes since 1.106: +37 -5 lines
add more BUILD_xxx helpers, and unify the variable lookup logic a bit more in tc-getBUILD_PROG

1 vapier 1.67 # Copyright 1999-2007 Gentoo Foundation
2 vapier 1.1 # Distributed under the terms of the GNU General Public License v2
3 vapier 1.107 # $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.106 2011/09/09 19:14:19 vapier Exp $
4 vapier 1.74
5     # @ECLASS: toolchain-funcs.eclass
6     # @MAINTAINER:
7     # Toolchain Ninjas <toolchain@gentoo.org>
8     # @BLURB: functions to query common info about the toolchain
9     # @DESCRIPTION:
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.
15 vapier 1.1
16 vapier 1.69 ___ECLASS_RECUR_TOOLCHAIN_FUNCS="yes"
17     [[ -z ${___ECLASS_RECUR_MULTILIB} ]] && inherit multilib
18 eradicator 1.34
19 vapier 1.1 DESCRIPTION="Based on the ${ECLASS} eclass"
20    
21 vapier 1.105 # tc-getPROG <VAR [search vars]> <default> [tuple]
22     _tc-getPROG() {
23     local tuple=$1
24     local v var vars=$2
25     local prog=$3
26    
27     var=${vars%% *}
28     for v in ${vars} ; do
29     if [[ -n ${!v} ]] ; then
30 vapier 1.106 export ${var}="${!v}"
31 vapier 1.105 echo "${!v}"
32     return 0
33     fi
34     done
35 vapier 1.1
36 eradicator 1.35 local search=
37 vapier 1.105 [[ -n $4 ]] && search=$(type -p "$4-${prog}")
38     [[ -z ${search} && -n ${!tuple} ]] && search=$(type -p "${!tuple}-${prog}")
39 eradicator 1.35 [[ -n ${search} ]] && prog=${search##*/}
40 vapier 1.1
41 vapier 1.17 export ${var}=${prog}
42 vapier 1.1 echo "${!var}"
43     }
44 vapier 1.107 tc-getBUILD_PROG() { _tc-getPROG CBUILD "BUILD_$1 $1_FOR_BUILD HOST$1" "${@:2}"; }
45 vapier 1.105 tc-getPROG() { _tc-getPROG CHOST "$@"; }
46 vapier 1.1
47 vapier 1.74 # @FUNCTION: tc-getAR
48     # @USAGE: [toolchain prefix]
49     # @RETURN: name of the archiver
50 vapier 1.33 tc-getAR() { tc-getPROG AR ar "$@"; }
51 vapier 1.74 # @FUNCTION: tc-getAS
52     # @USAGE: [toolchain prefix]
53     # @RETURN: name of the assembler
54 vapier 1.33 tc-getAS() { tc-getPROG AS as "$@"; }
55 vapier 1.74 # @FUNCTION: tc-getCC
56     # @USAGE: [toolchain prefix]
57     # @RETURN: name of the C compiler
58 vapier 1.33 tc-getCC() { tc-getPROG CC gcc "$@"; }
59 vapier 1.74 # @FUNCTION: tc-getCPP
60     # @USAGE: [toolchain prefix]
61     # @RETURN: name of the C preprocessor
62 robbat2 1.58 tc-getCPP() { tc-getPROG CPP cpp "$@"; }
63 vapier 1.74 # @FUNCTION: tc-getCXX
64     # @USAGE: [toolchain prefix]
65     # @RETURN: name of the C++ compiler
66 vapier 1.33 tc-getCXX() { tc-getPROG CXX g++ "$@"; }
67 vapier 1.74 # @FUNCTION: tc-getLD
68     # @USAGE: [toolchain prefix]
69     # @RETURN: name of the linker
70 vapier 1.33 tc-getLD() { tc-getPROG LD ld "$@"; }
71 vapier 1.74 # @FUNCTION: tc-getSTRIP
72     # @USAGE: [toolchain prefix]
73     # @RETURN: name of the strip program
74 kanaka 1.59 tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
75 vapier 1.74 # @FUNCTION: tc-getNM
76     # @USAGE: [toolchain prefix]
77     # @RETURN: name of the symbol/object thingy
78 vapier 1.33 tc-getNM() { tc-getPROG NM nm "$@"; }
79 vapier 1.74 # @FUNCTION: tc-getRANLIB
80     # @USAGE: [toolchain prefix]
81     # @RETURN: name of the archiver indexer
82 vapier 1.33 tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
83 kumba 1.86 # @FUNCTION: tc-getOBJCOPY
84     # @USAGE: [toolchain prefix]
85     # @RETURN: name of the object copier
86     tc-getOBJCOPY() { tc-getPROG OBJCOPY objcopy "$@"; }
87 vapier 1.74 # @FUNCTION: tc-getF77
88     # @USAGE: [toolchain prefix]
89     # @RETURN: name of the Fortran 77 compiler
90 dberkholz 1.101 tc-getF77() { tc-getPROG F77 gfortran "$@"; }
91 dberkholz 1.78 # @FUNCTION: tc-getFC
92 vapier 1.74 # @USAGE: [toolchain prefix]
93     # @RETURN: name of the Fortran 90 compiler
94 dberkholz 1.78 tc-getFC() { tc-getPROG FC gfortran "$@"; }
95 vapier 1.74 # @FUNCTION: tc-getGCJ
96     # @USAGE: [toolchain prefix]
97     # @RETURN: name of the java compiler
98 vapier 1.33 tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
99 vapier 1.96 # @FUNCTION: tc-getPKG_CONFIG
100     # @USAGE: [toolchain prefix]
101     # @RETURN: name of the pkg-config tool
102     tc-getPKG_CONFIG() { tc-getPROG PKG_CONFIG pkg-config "$@"; }
103 vapier 1.98 # @FUNCTION: tc-getRC
104     # @USAGE: [toolchain prefix]
105     # @RETURN: name of the Windows resource compiler
106     tc-getRC() { tc-getPROG RC windres "$@"; }
107     # @FUNCTION: tc-getDLLWRAP
108     # @USAGE: [toolchain prefix]
109     # @RETURN: name of the Windows dllwrap utility
110     tc-getDLLWRAP() { tc-getPROG DLLWRAP dllwrap "$@"; }
111 vapier 1.1
112 vapier 1.107 # @FUNCTION: tc-getBUILD_AR
113     # @USAGE: [toolchain prefix]
114     # @RETURN: name of the archiver for building binaries to run on the build machine
115     tc-getBUILD_AR() { tc-getBUILD_PROG AR ar "$@"; }
116     # @FUNCTION: tc-getBUILD_AS
117     # @USAGE: [toolchain prefix]
118     # @RETURN: name of the assembler for building binaries to run on the build machine
119     tc-getBUILD_AS() { tc-getBUILD_PROG AS as "$@"; }
120 vapier 1.74 # @FUNCTION: tc-getBUILD_CC
121     # @USAGE: [toolchain prefix]
122     # @RETURN: name of the C compiler for building binaries to run on the build machine
123 vapier 1.107 tc-getBUILD_CC() { tc-getBUILD_PROG CC gcc "$@"; }
124 vapier 1.105 # @FUNCTION: tc-getBUILD_CPP
125     # @USAGE: [toolchain prefix]
126     # @RETURN: name of the C preprocessor for building binaries to run on the build machine
127 vapier 1.107 tc-getBUILD_CPP() { tc-getBUILD_PROG CPP cpp "$@"; }
128 vapier 1.105 # @FUNCTION: tc-getBUILD_CXX
129     # @USAGE: [toolchain prefix]
130     # @RETURN: name of the C++ compiler for building binaries to run on the build machine
131 vapier 1.107 tc-getBUILD_CXX() { tc-getBUILD_PROG CXX g++ "$@"; }
132     # @FUNCTION: tc-getBUILD_LD
133     # @USAGE: [toolchain prefix]
134     # @RETURN: name of the linker for building binaries to run on the build machine
135     tc-getBUILD_LD() { tc-getBUILD_PROG LD ld "$@"; }
136     # @FUNCTION: tc-getBUILD_STRIP
137     # @USAGE: [toolchain prefix]
138     # @RETURN: name of the strip program for building binaries to run on the build machine
139     tc-getBUILD_STRIP() { tc-getBUILD_PROG STRIP strip "$@"; }
140     # @FUNCTION: tc-getBUILD_NM
141     # @USAGE: [toolchain prefix]
142     # @RETURN: name of the symbol/object thingy for building binaries to run on the build machine
143     tc-getBUILD_NM() { tc-getBUILD_PROG NM nm "$@"; }
144     # @FUNCTION: tc-getBUILD_RANLIB
145     # @USAGE: [toolchain prefix]
146     # @RETURN: name of the archiver indexer for building binaries to run on the build machine
147     tc-getBUILD_RANLIB() { tc-getBUILD_PROG RANLIB ranlib "$@"; }
148     # @FUNCTION: tc-getBUILD_OBJCOPY
149     # @USAGE: [toolchain prefix]
150     # @RETURN: name of the object copier for building binaries to run on the build machine
151     tc-getBUILD_OBJCOPY() { tc-getBUILD_PROG OBJCOPY objcopy "$@"; }
152     # @FUNCTION: tc-getBUILD_PKG_CONFIG
153     # @USAGE: [toolchain prefix]
154     # @RETURN: name of the pkg-config tool for building binaries to run on the build machine
155     tc-getBUILD_PKG_CONFIG() { tc-getBUILD_PROG PKG_CONFIG pkg-config "$@"; }
156 vapier 1.1
157 vapier 1.74 # @FUNCTION: tc-export
158     # @USAGE: <list of toolchain variables>
159     # @DESCRIPTION:
160     # Quick way to export a bunch of compiler vars at once.
161 vapier 1.10 tc-export() {
162     local var
163     for var in "$@" ; do
164 vapier 1.79 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
165 vapier 1.36 eval tc-get${var} > /dev/null
166 vapier 1.10 done
167     }
168    
169 vapier 1.74 # @FUNCTION: tc-is-cross-compiler
170     # @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
171 vapier 1.12 tc-is-cross-compiler() {
172 vapier 1.43 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
173 vapier 1.12 }
174    
175 vapier 1.74 # @FUNCTION: tc-is-softfloat
176     # @DESCRIPTION:
177 vapier 1.65 # See if this toolchain is a softfloat based one.
178 vapier 1.74 # @CODE
179 vapier 1.65 # The possible return values:
180     # - only: the target is always softfloat (never had fpu)
181     # - yes: the target should support softfloat
182 armin76 1.99 # - no: the target doesn't support softfloat
183 vapier 1.74 # @CODE
184 vapier 1.65 # This allows us to react differently where packages accept
185     # softfloat flags in the case where support is optional, but
186     # rejects softfloat flags where the target always lacks an fpu.
187     tc-is-softfloat() {
188     case ${CTARGET} in
189 vapier 1.66 bfin*|h8300*)
190 vapier 1.65 echo "only" ;;
191     *)
192     [[ ${CTARGET//_/-} == *-softfloat-* ]] \
193     && echo "yes" \
194     || echo "no"
195     ;;
196     esac
197     }
198 vapier 1.1
199 armin76 1.99 # @FUNCTION: tc-is-hardfloat
200     # @DESCRIPTION:
201     # See if this toolchain is a hardfloat based one.
202     # @CODE
203     # The possible return values:
204     # - yes: the target should support hardfloat
205     # - no: the target doesn't support hardfloat
206     tc-is-hardfloat() {
207     [[ ${CTARGET//_/-} == *-hardfloat-* ]] \
208     && echo "yes" \
209     || echo "no"
210     }
211    
212 grobian 1.91 # @FUNCTION: tc-is-static-only
213     # @DESCRIPTION:
214     # Return shell true if the target does not support shared libs, shell false
215     # otherwise.
216     tc-is-static-only() {
217     local host=${CTARGET:-${CHOST}}
218    
219     # *MiNT doesn't have shared libraries, only platform so far
220     return $([[ ${host} == *-mint* ]])
221     }
222    
223 vapier 1.100 # @FUNCTION: tc-has-openmp
224     # @USAGE: [toolchain prefix]
225     # @DESCRIPTION:
226     # See if the toolchain supports OpenMP.
227     tc-has-openmp() {
228     local base="${T}/test-tc-openmp"
229     cat <<-EOF > "${base}.c"
230     #include <omp.h>
231     int main() {
232     int nthreads, tid, ret = 0;
233     #pragma omp parallel private(nthreads, tid)
234     {
235     tid = omp_get_thread_num();
236     nthreads = omp_get_num_threads(); ret += tid + nthreads;
237     }
238     return ret;
239     }
240     EOF
241     $(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
242     local ret=$?
243     rm -f "${base}"*
244     return ${ret}
245     }
246    
247 vapier 1.97 # @FUNCTION: tc-has-tls
248     # @USAGE: [-s|-c|-l] [toolchain prefix]
249     # @DESCRIPTION:
250     # See if the toolchain supports thread local storage (TLS). Use -s to test the
251     # compiler, -c to also test the assembler, and -l to also test the C library
252     # (the default).
253     tc-has-tls() {
254     local base="${T}/test-tc-tls"
255     cat <<-EOF > "${base}.c"
256     int foo(int *i) {
257     static __thread int j = 0;
258     return *i ? j : *i;
259     }
260     EOF
261     local flags
262     case $1 in
263     -s) flags="-S";;
264     -c) flags="-c";;
265     -l) ;;
266     -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
267     esac
268     : ${flags:=-fPIC -shared -Wl,-z,defs}
269     [[ $1 == -* ]] && shift
270     $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
271     local ret=$?
272     rm -f "${base}"*
273     return ${ret}
274     }
275    
276 grobian 1.91
277 swegener 1.40 # Parse information from CBUILD/CHOST/CTARGET rather than
278 vapier 1.20 # use external variables from the profile.
279     tc-ninja_magic_to_arch() {
280 vapier 1.21 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
281 vapier 1.19
282     local type=$1
283     local host=$2
284 eradicator 1.25 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
285 vapier 1.19
286     case ${host} in
287     alpha*) echo alpha;;
288     arm*) echo arm;;
289 vapier 1.72 avr*) ninj avr32 avr;;
290 vapier 1.53 bfin*) ninj blackfin bfin;;
291 vapier 1.47 cris*) echo cris;;
292 vapier 1.19 hppa*) ninj parisc hppa;;
293 vapier 1.75 i?86*)
294     # Starting with linux-2.6.24, the 'x86_64' and 'i386'
295     # trees have been unified into 'x86'.
296 aballier 1.77 # FreeBSD still uses i386
297     if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
298 vapier 1.75 echo i386
299     else
300     echo x86
301     fi
302     ;;
303 vapier 1.19 ia64*) echo ia64;;
304 vapier 1.23 m68*) echo m68k;;
305 vapier 1.19 mips*) echo mips;;
306 vapier 1.52 nios2*) echo nios2;;
307     nios*) echo nios;;
308 vapier 1.49 powerpc*)
309 vapier 1.103 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
310     # have been unified into simply 'powerpc', but until 2.6.16,
311     # ppc32 is still using ARCH="ppc" as default
312     if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] ; then
313     echo powerpc
314     elif [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] ; then
315     if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
316     echo powerpc
317     else
318     echo ppc
319     fi
320     elif [[ ${host} == powerpc64* ]] ; then
321     echo ppc64
322     elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
323     ninj ppc64 ppc
324     else
325     echo ppc
326     fi
327     ;;
328 vapier 1.47 s390*) echo s390;;
329     sh64*) ninj sh64 sh;;
330     sh*) echo sh;;
331 vapier 1.19 sparc64*) ninj sparc64 sparc;;
332 vapier 1.28 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
333     && ninj sparc64 sparc \
334     || echo sparc
335     ;;
336 vapier 1.47 vax*) echo vax;;
337 aballier 1.104 x86_64*freebsd*) echo amd64;;
338 vapier 1.75 x86_64*)
339     # Starting with linux-2.6.24, the 'x86_64' and 'i386'
340     # trees have been unified into 'x86'.
341     if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
342     echo x86
343     else
344     ninj x86_64 amd64
345     fi
346     ;;
347 vapier 1.73
348     # since our usage of tc-arch is largely concerned with
349     # normalizing inputs for testing ${CTARGET}, let's filter
350     # other cross targets (mingw and such) into the unknown.
351     *) echo unknown;;
352 vapier 1.19 esac
353     }
354 vapier 1.74 # @FUNCTION: tc-arch-kernel
355     # @USAGE: [toolchain prefix]
356     # @RETURN: name of the kernel arch according to the compiler target
357 vapier 1.20 tc-arch-kernel() {
358 vapier 1.74 tc-ninja_magic_to_arch kern "$@"
359 vapier 1.19 }
360 vapier 1.74 # @FUNCTION: tc-arch
361     # @USAGE: [toolchain prefix]
362     # @RETURN: name of the portage arch according to the compiler target
363 vapier 1.20 tc-arch() {
364 vapier 1.74 tc-ninja_magic_to_arch portage "$@"
365 vapier 1.19 }
366 vapier 1.74
367 robbat2 1.71 tc-endian() {
368     local host=$1
369     [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
370     host=${host%%-*}
371    
372     case ${host} in
373     alpha*) echo big;;
374     arm*b*) echo big;;
375     arm*) echo little;;
376     cris*) echo little;;
377     hppa*) echo big;;
378     i?86*) echo little;;
379     ia64*) echo little;;
380     m68*) echo big;;
381     mips*l*) echo little;;
382     mips*) echo big;;
383     powerpc*) echo big;;
384     s390*) echo big;;
385     sh*b*) echo big;;
386     sh*) echo little;;
387     sparc*) echo big;;
388     x86_64*) echo little;;
389     *) echo wtf;;
390     esac
391     }
392 vapier 1.19
393 vapier 1.102 # Internal func. The first argument is the version info to expand.
394     # Query the preprocessor to improve compatibility across different
395     # compilers rather than maintaining a --version flag matrix. #335943
396     _gcc_fullversion() {
397     local ver="$1"; shift
398     set -- `$(tc-getCPP "$@") -E -P - <<<"__GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__"`
399     eval echo "$ver"
400     }
401    
402 vapier 1.74 # @FUNCTION: gcc-fullversion
403     # @RETURN: compiler version (major.minor.micro: [3.4.6])
404 vapier 1.1 gcc-fullversion() {
405 vapier 1.102 _gcc_fullversion '$1.$2.$3' "$@"
406 vapier 1.1 }
407 vapier 1.74 # @FUNCTION: gcc-version
408     # @RETURN: compiler version (major.minor: [3.4].6)
409 vapier 1.1 gcc-version() {
410 vapier 1.102 _gcc_fullversion '$1.$2' "$@"
411 vapier 1.1 }
412 vapier 1.74 # @FUNCTION: gcc-major-version
413     # @RETURN: major compiler version (major: [3].4.6)
414 vapier 1.1 gcc-major-version() {
415 vapier 1.102 _gcc_fullversion '$1' "$@"
416 vapier 1.1 }
417 vapier 1.74 # @FUNCTION: gcc-minor-version
418     # @RETURN: minor compiler version (minor: 3.[4].6)
419 vapier 1.1 gcc-minor-version() {
420 vapier 1.102 _gcc_fullversion '$2' "$@"
421 vapier 1.1 }
422 vapier 1.74 # @FUNCTION: gcc-micro-version
423     # @RETURN: micro compiler version (micro: 3.4.[6])
424 vapier 1.1 gcc-micro-version() {
425 vapier 1.102 _gcc_fullversion '$3' "$@"
426 vapier 1.1 }
427 vapier 1.74
428 kevquinn 1.68 # Returns the installation directory - internal toolchain
429     # function for use by _gcc-specs-exists (for flag-o-matic).
430     _gcc-install-dir() {
431 vapier 1.76 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
432 kevquinn 1.68 awk '$1=="install:" {print $2}')"
433     }
434     # Returns true if the indicated specs file exists - internal toolchain
435     # function for use by flag-o-matic.
436     _gcc-specs-exists() {
437     [[ -f $(_gcc-install-dir)/$1 ]]
438     }
439 kevquinn 1.41
440 kevquinn 1.68 # Returns requested gcc specs directive unprocessed - for used by
441     # gcc-specs-directive()
442 kevquinn 1.46 # Note; later specs normally overwrite earlier ones; however if a later
443     # spec starts with '+' then it appends.
444     # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
445 kevquinn 1.68 # as "Reading <file>", in order. Strictly speaking, if there's a
446     # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
447     # the same token anything from 'gcc -dumpspecs' is overridden by
448     # the contents of $(gcc_install_dir)/specs so the result is the
449     # same either way.
450     _gcc-specs-directive_raw() {
451 kevquinn 1.57 local cc=$(tc-getCC)
452     local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
453     ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
454 kevquinn 1.46 'BEGIN { pspec=""; spec=""; outside=1 }
455     $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
456 kevquinn 1.41 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
457 kevquinn 1.46 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
458     { spec=spec $0 }
459     END { print spec }'
460     return 0
461 kevquinn 1.41 }
462    
463 kevquinn 1.68 # Return the requested gcc specs directive, with all included
464     # specs expanded.
465     # Note, it does not check for inclusion loops, which cause it
466     # to never finish - but such loops are invalid for gcc and we're
467     # assuming gcc is operational.
468     gcc-specs-directive() {
469     local directive subdname subdirective
470     directive="$(_gcc-specs-directive_raw $1)"
471     while [[ ${directive} == *%\(*\)* ]]; do
472     subdname=${directive/*%\(}
473     subdname=${subdname/\)*}
474     subdirective="$(_gcc-specs-directive_raw ${subdname})"
475     directive="${directive//\%(${subdname})/${subdirective}}"
476     done
477     echo "${directive}"
478     return 0
479     }
480    
481 kevquinn 1.41 # Returns true if gcc sets relro
482     gcc-specs-relro() {
483     local directive
484     directive=$(gcc-specs-directive link_command)
485 gengor 1.84 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
486 kevquinn 1.41 }
487     # Returns true if gcc sets now
488     gcc-specs-now() {
489     local directive
490     directive=$(gcc-specs-directive link_command)
491 gengor 1.84 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
492 kevquinn 1.41 }
493     # Returns true if gcc builds PIEs
494     gcc-specs-pie() {
495     local directive
496     directive=$(gcc-specs-directive cc1)
497 gengor 1.84 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
498 kevquinn 1.41 }
499     # Returns true if gcc builds with the stack protector
500     gcc-specs-ssp() {
501     local directive
502     directive=$(gcc-specs-directive cc1)
503 gengor 1.84 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
504 kevquinn 1.41 }
505 kevquinn 1.46 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
506     gcc-specs-ssp-to-all() {
507     local directive
508     directive=$(gcc-specs-directive cc1)
509 gengor 1.84 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
510 kevquinn 1.46 }
511 gengor 1.80 # Returns true if gcc builds with fno-strict-overflow
512     gcc-specs-nostrict() {
513     local directive
514     directive=$(gcc-specs-directive cc1)
515 gengor 1.84 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
516 gengor 1.80 }
517 vapier 1.60
518    
519 vapier 1.74 # @FUNCTION: gen_usr_ldscript
520 vapier 1.85 # @USAGE: [-a] <list of libs to create linker scripts for>
521 vapier 1.74 # @DESCRIPTION:
522 vapier 1.60 # This function generate linker scripts in /usr/lib for dynamic
523     # libs in /lib. This is to fix linking problems when you have
524     # the .so in /lib, and the .a in /usr/lib. What happens is that
525     # in some cases when linking dynamic, the .a in /usr/lib is used
526     # instead of the .so in /lib due to gcc/libtool tweaking ld's
527 vapier 1.74 # library search path. This causes many builds to fail.
528 vapier 1.60 # See bug #4411 for more info.
529     #
530     # Note that you should in general use the unversioned name of
531 vapier 1.74 # the library (libfoo.so), as ldconfig should usually update it
532     # correctly to point to the latest version of the library present.
533 vapier 1.70 gen_usr_ldscript() {
534 vapier 1.85 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
535 grobian 1.91 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
536    
537     tc-is-static-only && return
538    
539 vapier 1.60 # Just make sure it exists
540     dodir /usr/${libdir}
541    
542 vapier 1.85 if [[ $1 == "-a" ]] ; then
543     auto=true
544     shift
545     dodir /${libdir}
546     fi
547    
548 vapier 1.60 # OUTPUT_FORMAT gives hints to the linker as to what binary format
549     # is referenced ... makes multilib saner
550     output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
551     [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
552    
553     for lib in "$@" ; do
554 grobian 1.91 local tlib
555     if ${auto} ; then
556     lib="lib${lib}${suffix}"
557 grobian 1.90 else
558 grobian 1.91 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
559     # This especially is for AIX where $(get_libname) can return ".a",
560     # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
561     [[ -r ${ED}/${libdir}/${lib} ]] || continue
562     #TODO: better die here?
563     fi
564    
565     case ${CTARGET:-${CHOST}} in
566     *-darwin*)
567 vapier 1.85 if ${auto} ; then
568 grobian 1.91 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
569     else
570     tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
571     fi
572     [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
573     tlib=${tlib##*/}
574    
575     if ${auto} ; then
576     mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
577 grobian 1.92 # some install_names are funky: they encode a version
578     if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
579     mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
580     fi
581 grobian 1.91 rm -f "${ED}"/${libdir}/${lib}
582     fi
583    
584     # Mach-O files have an id, which is like a soname, it tells how
585     # another object linking against this lib should reference it.
586     # Since we moved the lib from usr/lib into lib this reference is
587     # wrong. Hence, we update it here. We don't configure with
588     # libdir=/lib because that messes up libtool files.
589     # Make sure we don't lose the specific version, so just modify the
590     # existing install_name
591 grobian 1.94 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
592 grobian 1.95 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
593 grobian 1.94 local nowrite=yes
594     fi
595 grobian 1.91 install_name_tool \
596     -id "${EPREFIX}"/${libdir}/${tlib} \
597 grobian 1.94 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
598 grobian 1.95 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
599 grobian 1.91 # Now as we don't use GNU binutils and our linker doesn't
600     # understand linker scripts, just create a symlink.
601     pushd "${ED}/usr/${libdir}" > /dev/null
602     ln -snf "../../${libdir}/${tlib}" "${lib}"
603     popd > /dev/null
604     ;;
605 grobian 1.93 *-aix*|*-irix*|*64*-hpux*|*-interix*|*-winnt*)
606 grobian 1.91 if ${auto} ; then
607     mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
608     # no way to retrieve soname on these platforms (?)
609     tlib=$(readlink "${ED}"/${libdir}/${lib})
610     tlib=${tlib##*/}
611     if [[ -z ${tlib} ]] ; then
612     # ok, apparently was not a symlink, don't remove it and
613     # just link to it
614     tlib=${lib}
615     else
616     rm -f "${ED}"/${libdir}/${lib}
617     fi
618     else
619     tlib=${lib}
620     fi
621    
622     # we don't have GNU binutils on these platforms, so we symlink
623     # instead, which seems to work fine. Keep it relative, otherwise
624     # we break some QA checks in Portage
625     # on interix, the linker scripts would work fine in _most_
626     # situations. if a library links to such a linker script the
627     # absolute path to the correct library is inserted into the binary,
628     # which is wrong, since anybody linking _without_ libtool will miss
629     # some dependencies, since the stupid linker cannot find libraries
630     # hardcoded with absolute paths (as opposed to the loader, which
631     # seems to be able to do this).
632     # this has been seen while building shared-mime-info which needs
633     # libxml2, but links without libtool (and does not add libz to the
634     # command line by itself).
635     pushd "${ED}/usr/${libdir}" > /dev/null
636     ln -snf "../../${libdir}/${tlib}" "${lib}"
637     popd > /dev/null
638     ;;
639 grobian 1.93 hppa*-hpux*) # PA-RISC 32bit (SOM) only, others (ELF) match *64*-hpux* above.
640     if ${auto} ; then
641     tlib=$(chatr "${ED}"/usr/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
642     [[ -z ${tlib} ]] && tlib=${lib}
643     tlib=${tlib##*/} # 'internal name' can have a path component
644     mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
645     # some SONAMEs are funky: they encode a version before the .so
646     if [[ ${tlib} != ${lib}* ]] ; then
647     mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
648     fi
649     [[ ${tlib} != ${lib} ]] &&
650     rm -f "${ED}"/${libdir}/${lib}
651     else
652     tlib=$(chatr "${ED}"/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
653     [[ -z ${tlib} ]] && tlib=${lib}
654     tlib=${tlib##*/} # 'internal name' can have a path component
655     fi
656     pushd "${ED}"/usr/${libdir} >/dev/null
657     ln -snf "../../${libdir}/${tlib}" "${lib}"
658     # need the internal name in usr/lib too, to be available at runtime
659     # when linked with /path/to/lib.sl (hardcode_direct_absolute=yes)
660     [[ ${tlib} != ${lib} ]] &&
661     ln -snf "../../${libdir}/${tlib}" "${tlib}"
662     popd >/dev/null
663     ;;
664 grobian 1.91 *)
665     if ${auto} ; then
666     tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
667     [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
668     mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
669 vapier 1.88 # some SONAMEs are funky: they encode a version before the .so
670     if [[ ${tlib} != ${lib}* ]] ; then
671 grobian 1.91 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
672 vapier 1.88 fi
673 grobian 1.91 rm -f "${ED}"/${libdir}/${lib}
674 vapier 1.85 else
675     tlib=${lib}
676     fi
677 grobian 1.91 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
678 grobian 1.61 /* GNU ld script
679 vapier 1.87 Since Gentoo has critical dynamic libraries in /lib, and the static versions
680     in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
681     run into linking problems. This "fake" dynamic lib is a linker script that
682     redirects the linker to the real lib. And yes, this works in the cross-
683     compiling scenario as the sysroot-ed linker will prepend the real path.
684 grobian 1.61
685     See bug http://bugs.gentoo.org/4411 for more info.
686     */
687     ${output_format}
688 grobian 1.91 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
689 grobian 1.61 END_LDSCRIPT
690 grobian 1.91 ;;
691     esac
692     fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
693 vapier 1.60 done
694     }

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