/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.76 - (show annotations) (download)
Wed Apr 16 14:16:45 2008 UTC (6 years, 3 months ago) by vapier
Branch: MAIN
Changes since 1.75: +2 -2 lines
set locale to C when trying to parse the output of gcc as reported by Xake #217852

1 # Copyright 1999-2007 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.75 2008/01/02 01:01:03 vapier Exp $
4
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
16 ___ECLASS_RECUR_TOOLCHAIN_FUNCS="yes"
17 [[ -z ${___ECLASS_RECUR_MULTILIB} ]] && inherit multilib
18
19 DESCRIPTION="Based on the ${ECLASS} eclass"
20
21 tc-getPROG() {
22 local var=$1
23 local prog=$2
24
25 if [[ -n ${!var} ]] ; then
26 echo "${!var}"
27 return 0
28 fi
29
30 local search=
31 [[ -n $3 ]] && search=$(type -p "$3-${prog}")
32 [[ -z ${search} && -n ${CHOST} ]] && search=$(type -p "${CHOST}-${prog}")
33 [[ -n ${search} ]] && prog=${search##*/}
34
35 export ${var}=${prog}
36 echo "${!var}"
37 }
38
39 # @FUNCTION: tc-getAR
40 # @USAGE: [toolchain prefix]
41 # @RETURN: name of the archiver
42 tc-getAR() { tc-getPROG AR ar "$@"; }
43 # @FUNCTION: tc-getAS
44 # @USAGE: [toolchain prefix]
45 # @RETURN: name of the assembler
46 tc-getAS() { tc-getPROG AS as "$@"; }
47 # @FUNCTION: tc-getCC
48 # @USAGE: [toolchain prefix]
49 # @RETURN: name of the C compiler
50 tc-getCC() { tc-getPROG CC gcc "$@"; }
51 # @FUNCTION: tc-getCPP
52 # @USAGE: [toolchain prefix]
53 # @RETURN: name of the C preprocessor
54 tc-getCPP() { tc-getPROG CPP cpp "$@"; }
55 # @FUNCTION: tc-getCXX
56 # @USAGE: [toolchain prefix]
57 # @RETURN: name of the C++ compiler
58 tc-getCXX() { tc-getPROG CXX g++ "$@"; }
59 # @FUNCTION: tc-getLD
60 # @USAGE: [toolchain prefix]
61 # @RETURN: name of the linker
62 tc-getLD() { tc-getPROG LD ld "$@"; }
63 # @FUNCTION: tc-getSTRIP
64 # @USAGE: [toolchain prefix]
65 # @RETURN: name of the strip program
66 tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
67 # @FUNCTION: tc-getNM
68 # @USAGE: [toolchain prefix]
69 # @RETURN: name of the symbol/object thingy
70 tc-getNM() { tc-getPROG NM nm "$@"; }
71 # @FUNCTION: tc-getRANLIB
72 # @USAGE: [toolchain prefix]
73 # @RETURN: name of the archiver indexer
74 tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
75 # @FUNCTION: tc-getF77
76 # @USAGE: [toolchain prefix]
77 # @RETURN: name of the Fortran 77 compiler
78 tc-getF77() { tc-getPROG F77 f77 "$@"; }
79 # @FUNCTION: tc-getF90
80 # @USAGE: [toolchain prefix]
81 # @RETURN: name of the Fortran 90 compiler
82 tc-getF90() { tc-getPROG F90 gfortran "$@"; }
83 # @FUNCTION: tc-getFORTRAN
84 # @USAGE: [toolchain prefix]
85 # @RETURN: name of the Fortran compiler
86 tc-getFORTRAN() { tc-getPROG FORTRAN gfortran "$@"; }
87 # @FUNCTION: tc-getGCJ
88 # @USAGE: [toolchain prefix]
89 # @RETURN: name of the java compiler
90 tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
91
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
95 tc-getBUILD_CC() {
96 local v
97 for v in CC_FOR_BUILD BUILD_CC HOSTCC ; do
98 if [[ -n ${!v} ]] ; then
99 export BUILD_CC=${!v}
100 echo "${!v}"
101 return 0
102 fi
103 done
104
105 local search=
106 if [[ -n ${CBUILD} ]] ; then
107 search=$(type -p ${CBUILD}-gcc)
108 search=${search##*/}
109 fi
110 search=${search:-gcc}
111
112 export BUILD_CC=${search}
113 echo "${search}"
114 }
115
116 # @FUNCTION: tc-export
117 # @USAGE: <list of toolchain variables>
118 # @DESCRIPTION:
119 # Quick way to export a bunch of compiler vars at once.
120 tc-export() {
121 local var
122 for var in "$@" ; do
123 eval tc-get${var} > /dev/null
124 done
125 }
126
127 # @FUNCTION: tc-is-cross-compiler
128 # @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
129 tc-is-cross-compiler() {
130 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
131 }
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.
145 tc-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 }
156
157 # Parse information from CBUILD/CHOST/CTARGET rather than
158 # use external variables from the profile.
159 tc-ninja_magic_to_arch() {
160 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
161
162 local type=$1
163 local host=$2
164 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
165
166 case ${host} in
167 alpha*) echo alpha;;
168 arm*) echo arm;;
169 avr*) ninj avr32 avr;;
170 bfin*) ninj blackfin bfin;;
171 cris*) echo cris;;
172 hppa*) ninj parisc hppa;;
173 i?86*)
174 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
175 # trees have been unified into 'x86'.
176 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) ]] ; then
177 echo i386
178 else
179 echo x86
180 fi
181 ;;
182 ia64*) echo ia64;;
183 m68*) echo m68k;;
184 mips*) echo mips;;
185 nios2*) echo nios2;;
186 nios*) echo nios;;
187 powerpc*)
188 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
189 # have been unified into simply 'powerpc', but until 2.6.16,
190 # ppc32 is still using ARCH="ppc" as default
191 if [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] && [[ ${type} == "kern" ]] ; then
192 echo powerpc
193 elif [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] && [[ ${type} == "kern" ]] ; then
194 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
195 echo powerpc
196 else
197 echo ppc
198 fi
199 elif [[ ${host} == powerpc64* ]] ; then
200 echo ppc64
201 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
202 ninj ppc64 ppc
203 else
204 echo ppc
205 fi
206 ;;
207 s390*) echo s390;;
208 sh64*) ninj sh64 sh;;
209 sh*) echo sh;;
210 sparc64*) ninj sparc64 sparc;;
211 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
212 && ninj sparc64 sparc \
213 || echo sparc
214 ;;
215 vax*) echo vax;;
216 x86_64*)
217 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
218 # trees have been unified into 'x86'.
219 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
220 echo x86
221 else
222 ninj x86_64 amd64
223 fi
224 ;;
225
226 # since our usage of tc-arch is largely concerned with
227 # normalizing inputs for testing ${CTARGET}, let's filter
228 # other cross targets (mingw and such) into the unknown.
229 *) echo unknown;;
230 esac
231 }
232 # @FUNCTION: tc-arch-kernel
233 # @USAGE: [toolchain prefix]
234 # @RETURN: name of the kernel arch according to the compiler target
235 tc-arch-kernel() {
236 tc-ninja_magic_to_arch kern "$@"
237 }
238 # @FUNCTION: tc-arch
239 # @USAGE: [toolchain prefix]
240 # @RETURN: name of the portage arch according to the compiler target
241 tc-arch() {
242 tc-ninja_magic_to_arch portage "$@"
243 }
244
245 tc-endian() {
246 local host=$1
247 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
248 host=${host%%-*}
249
250 case ${host} in
251 alpha*) echo big;;
252 arm*b*) echo big;;
253 arm*) echo little;;
254 cris*) echo little;;
255 hppa*) echo big;;
256 i?86*) echo little;;
257 ia64*) echo little;;
258 m68*) echo big;;
259 mips*l*) echo little;;
260 mips*) echo big;;
261 powerpc*) echo big;;
262 s390*) echo big;;
263 sh*b*) echo big;;
264 sh*) echo little;;
265 sparc*) echo big;;
266 x86_64*) echo little;;
267 *) echo wtf;;
268 esac
269 }
270
271 # @FUNCTION: gcc-fullversion
272 # @RETURN: compiler version (major.minor.micro: [3.4.6])
273 gcc-fullversion() {
274 $(tc-getCC "$@") -dumpversion
275 }
276 # @FUNCTION: gcc-version
277 # @RETURN: compiler version (major.minor: [3.4].6)
278 gcc-version() {
279 gcc-fullversion "$@" | cut -f1,2 -d.
280 }
281 # @FUNCTION: gcc-major-version
282 # @RETURN: major compiler version (major: [3].4.6)
283 gcc-major-version() {
284 gcc-version "$@" | cut -f1 -d.
285 }
286 # @FUNCTION: gcc-minor-version
287 # @RETURN: minor compiler version (minor: 3.[4].6)
288 gcc-minor-version() {
289 gcc-version "$@" | cut -f2 -d.
290 }
291 # @FUNCTION: gcc-micro-version
292 # @RETURN: micro compiler version (micro: 3.4.[6])
293 gcc-micro-version() {
294 gcc-fullversion "$@" | cut -f3 -d. | cut -f1 -d-
295 }
296
297 # Returns the installation directory - internal toolchain
298 # function for use by _gcc-specs-exists (for flag-o-matic).
299 _gcc-install-dir() {
300 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
301 awk '$1=="install:" {print $2}')"
302 }
303 # Returns true if the indicated specs file exists - internal toolchain
304 # function for use by flag-o-matic.
305 _gcc-specs-exists() {
306 [[ -f $(_gcc-install-dir)/$1 ]]
307 }
308
309 # Returns requested gcc specs directive unprocessed - for used by
310 # gcc-specs-directive()
311 # Note; later specs normally overwrite earlier ones; however if a later
312 # spec starts with '+' then it appends.
313 # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
314 # as "Reading <file>", in order. Strictly speaking, if there's a
315 # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
316 # the same token anything from 'gcc -dumpspecs' is overridden by
317 # the contents of $(gcc_install_dir)/specs so the result is the
318 # same either way.
319 _gcc-specs-directive_raw() {
320 local cc=$(tc-getCC)
321 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
322 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
323 'BEGIN { pspec=""; spec=""; outside=1 }
324 $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
325 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
326 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
327 { spec=spec $0 }
328 END { print spec }'
329 return 0
330 }
331
332 # Return the requested gcc specs directive, with all included
333 # specs expanded.
334 # Note, it does not check for inclusion loops, which cause it
335 # to never finish - but such loops are invalid for gcc and we're
336 # assuming gcc is operational.
337 gcc-specs-directive() {
338 local directive subdname subdirective
339 directive="$(_gcc-specs-directive_raw $1)"
340 while [[ ${directive} == *%\(*\)* ]]; do
341 subdname=${directive/*%\(}
342 subdname=${subdname/\)*}
343 subdirective="$(_gcc-specs-directive_raw ${subdname})"
344 directive="${directive//\%(${subdname})/${subdirective}}"
345 done
346 echo "${directive}"
347 return 0
348 }
349
350 # Returns true if gcc sets relro
351 gcc-specs-relro() {
352 local directive
353 directive=$(gcc-specs-directive link_command)
354 return $([[ ${directive/\{!norelro:} != ${directive} ]])
355 }
356 # Returns true if gcc sets now
357 gcc-specs-now() {
358 local directive
359 directive=$(gcc-specs-directive link_command)
360 return $([[ ${directive/\{!nonow:} != ${directive} ]])
361 }
362 # Returns true if gcc builds PIEs
363 gcc-specs-pie() {
364 local directive
365 directive=$(gcc-specs-directive cc1)
366 return $([[ ${directive/\{!nopie:} != ${directive} ]])
367 }
368 # Returns true if gcc builds with the stack protector
369 gcc-specs-ssp() {
370 local directive
371 directive=$(gcc-specs-directive cc1)
372 return $([[ ${directive/\{!fno-stack-protector:} != ${directive} ]])
373 }
374 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
375 gcc-specs-ssp-to-all() {
376 local directive
377 directive=$(gcc-specs-directive cc1)
378 return $([[ ${directive/\{!fno-stack-protector-all:} != ${directive} ]])
379 }
380
381
382 # @FUNCTION: gen_usr_ldscript
383 # @USAGE: <list of libs to create linker scripts for>
384 # @DESCRIPTION:
385 # This function generate linker scripts in /usr/lib for dynamic
386 # libs in /lib. This is to fix linking problems when you have
387 # the .so in /lib, and the .a in /usr/lib. What happens is that
388 # in some cases when linking dynamic, the .a in /usr/lib is used
389 # instead of the .so in /lib due to gcc/libtool tweaking ld's
390 # library search path. This causes many builds to fail.
391 # See bug #4411 for more info.
392 #
393 # Note that you should in general use the unversioned name of
394 # the library (libfoo.so), as ldconfig should usually update it
395 # correctly to point to the latest version of the library present.
396 gen_usr_ldscript() {
397 local lib libdir=$(get_libdir) output_format=""
398 # Just make sure it exists
399 dodir /usr/${libdir}
400
401 # OUTPUT_FORMAT gives hints to the linker as to what binary format
402 # is referenced ... makes multilib saner
403 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
404 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
405
406 for lib in "$@" ; do
407 if [[ ${USERLAND} == "Darwin" ]] ; then
408 ewarn "Not creating fake dynamic library for $lib on Darwin;"
409 ewarn "making a symlink instead."
410 dosym "/${libdir}/${lib}" "/usr/${libdir}/${lib}"
411 else
412 cat > "${D}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
413 /* GNU ld script
414 Since Gentoo has critical dynamic libraries
415 in /lib, and the static versions in /usr/lib,
416 we need to have a "fake" dynamic lib in /usr/lib,
417 otherwise we run into linking problems.
418
419 See bug http://bugs.gentoo.org/4411 for more info.
420 */
421 ${output_format}
422 GROUP ( /${libdir}/${lib} )
423 END_LDSCRIPT
424 fi
425 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
426 done
427 }

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