/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.71 - (show annotations) (download)
Wed Jul 11 04:06:29 2007 UTC (7 years, 2 months ago) by robbat2
Branch: MAIN
Changes since 1.70: +26 -1 lines
Resurrect tc-endian as I need it to control some testcases.

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 1.70 2007/06/16 07:11:43 vapier Exp $
4 #
5 # Maintainer: Toolchain Ninjas <toolchain@gentoo.org>
6 #
7 # This eclass contains (or should) functions to get common info
8 # about the toolchain (libc/compiler/binutils/etc...)
9
10 ___ECLASS_RECUR_TOOLCHAIN_FUNCS="yes"
11 [[ -z ${___ECLASS_RECUR_MULTILIB} ]] && inherit multilib
12
13 DESCRIPTION="Based on the ${ECLASS} eclass"
14
15 tc-getPROG() {
16 local var=$1
17 local prog=$2
18
19 if [[ -n ${!var} ]] ; then
20 echo "${!var}"
21 return 0
22 fi
23
24 local search=
25 [[ -n $3 ]] && search=$(type -p "$3-${prog}")
26 [[ -z ${search} && -n ${CHOST} ]] && search=$(type -p "${CHOST}-${prog}")
27 [[ -n ${search} ]] && prog=${search##*/}
28
29 export ${var}=${prog}
30 echo "${!var}"
31 }
32
33 # Returns the name of the archiver
34 tc-getAR() { tc-getPROG AR ar "$@"; }
35 # Returns the name of the assembler
36 tc-getAS() { tc-getPROG AS as "$@"; }
37 # Returns the name of the C compiler
38 tc-getCC() { tc-getPROG CC gcc "$@"; }
39 # Returns the name of the C preprocessor
40 tc-getCPP() { tc-getPROG CPP cpp "$@"; }
41 # Returns the name of the C++ compiler
42 tc-getCXX() { tc-getPROG CXX g++ "$@"; }
43 # Returns the name of the linker
44 tc-getLD() { tc-getPROG LD ld "$@"; }
45 # Returns the name of the strip prog
46 tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
47 # Returns the name of the symbol/object thingy
48 tc-getNM() { tc-getPROG NM nm "$@"; }
49 # Returns the name of the archiver indexer
50 tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
51 # Returns the name of the fortran 77 compiler
52 tc-getF77() { tc-getPROG F77 f77 "$@"; }
53 # Returns the name of the fortran 90 compiler
54 tc-getF90() { tc-getPROG F90 gfortran "$@"; }
55 # Returns the name of the fortran compiler
56 tc-getFORTRAN() { tc-getPROG FORTRAN gfortran "$@"; }
57 # Returns the name of the java compiler
58 tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
59
60 # Returns the name of the C compiler for build
61 tc-getBUILD_CC() {
62 local v
63 for v in CC_FOR_BUILD BUILD_CC HOSTCC ; do
64 if [[ -n ${!v} ]] ; then
65 export BUILD_CC=${!v}
66 echo "${!v}"
67 return 0
68 fi
69 done
70
71 local search=
72 if [[ -n ${CBUILD} ]] ; then
73 search=$(type -p ${CBUILD}-gcc)
74 search=${search##*/}
75 fi
76 search=${search:-gcc}
77
78 export BUILD_CC=${search}
79 echo "${search}"
80 }
81
82 # Quick way to export a bunch of vars at once
83 tc-export() {
84 local var
85 for var in "$@" ; do
86 eval tc-get${var} > /dev/null
87 done
88 }
89
90 # A simple way to see if we're using a cross-compiler ...
91 tc-is-cross-compiler() {
92 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
93 }
94
95 # See if this toolchain is a softfloat based one.
96 # The possible return values:
97 # - only: the target is always softfloat (never had fpu)
98 # - yes: the target should support softfloat
99 # - no: the target should support hardfloat
100 # This allows us to react differently where packages accept
101 # softfloat flags in the case where support is optional, but
102 # rejects softfloat flags where the target always lacks an fpu.
103 tc-is-softfloat() {
104 case ${CTARGET} in
105 bfin*|h8300*)
106 echo "only" ;;
107 *)
108 [[ ${CTARGET//_/-} == *-softfloat-* ]] \
109 && echo "yes" \
110 || echo "no"
111 ;;
112 esac
113 }
114
115 # Parse information from CBUILD/CHOST/CTARGET rather than
116 # use external variables from the profile.
117 tc-ninja_magic_to_arch() {
118 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
119
120 local type=$1
121 local host=$2
122 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
123
124 case ${host} in
125 alpha*) echo alpha;;
126 arm*) echo arm;;
127 bfin*) ninj blackfin bfin;;
128 cris*) echo cris;;
129 hppa*) ninj parisc hppa;;
130 i?86*) ninj i386 x86;;
131 ia64*) echo ia64;;
132 m68*) echo m68k;;
133 mips*) echo mips;;
134 nios2*) echo nios2;;
135 nios*) echo nios;;
136 powerpc*)
137 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
138 # have been unified into simply 'powerpc', but until 2.6.16,
139 # ppc32 is still using ARCH="ppc" as default
140 if [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] && [[ ${type} == "kern" ]] ; then
141 echo powerpc
142 elif [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] && [[ ${type} == "kern" ]] ; then
143 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
144 echo powerpc
145 else
146 echo ppc
147 fi
148 elif [[ ${host} == powerpc64* ]] ; then
149 echo ppc64
150 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
151 ninj ppc64 ppc
152 else
153 echo ppc
154 fi
155 ;;
156 s390*) echo s390;;
157 sh64*) ninj sh64 sh;;
158 sh*) echo sh;;
159 sparc64*) ninj sparc64 sparc;;
160 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
161 && ninj sparc64 sparc \
162 || echo sparc
163 ;;
164 vax*) echo vax;;
165 x86_64*) ninj x86_64 amd64;;
166 *) echo ${ARCH};;
167 esac
168 }
169 tc-arch-kernel() {
170 tc-ninja_magic_to_arch kern $@
171 }
172 tc-arch() {
173 tc-ninja_magic_to_arch portage $@
174 }
175 tc-endian() {
176 local host=$1
177 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
178 host=${host%%-*}
179
180 case ${host} in
181 alpha*) echo big;;
182 arm*b*) echo big;;
183 arm*) echo little;;
184 cris*) echo little;;
185 hppa*) echo big;;
186 i?86*) echo little;;
187 ia64*) echo little;;
188 m68*) echo big;;
189 mips*l*) echo little;;
190 mips*) echo big;;
191 powerpc*) echo big;;
192 s390*) echo big;;
193 sh*b*) echo big;;
194 sh*) echo little;;
195 sparc*) echo big;;
196 x86_64*) echo little;;
197 *) echo wtf;;
198 esac
199 }
200
201 # Returns the version as by `$CC -dumpversion`
202 gcc-fullversion() {
203 $(tc-getCC "$@") -dumpversion
204 }
205 # Returns the version, but only the <major>.<minor>
206 gcc-version() {
207 gcc-fullversion "$@" | cut -f1,2 -d.
208 }
209 # Returns the Major version
210 gcc-major-version() {
211 gcc-version "$@" | cut -f1 -d.
212 }
213 # Returns the Minor version
214 gcc-minor-version() {
215 gcc-version "$@" | cut -f2 -d.
216 }
217 # Returns the Micro version
218 gcc-micro-version() {
219 gcc-fullversion "$@" | cut -f3 -d. | cut -f1 -d-
220 }
221 # Returns the installation directory - internal toolchain
222 # function for use by _gcc-specs-exists (for flag-o-matic).
223 _gcc-install-dir() {
224 echo "$($(tc-getCC) -print-search-dirs 2> /dev/null |\
225 awk '$1=="install:" {print $2}')"
226 }
227 # Returns true if the indicated specs file exists - internal toolchain
228 # function for use by flag-o-matic.
229 _gcc-specs-exists() {
230 [[ -f $(_gcc-install-dir)/$1 ]]
231 }
232
233 # Returns requested gcc specs directive unprocessed - for used by
234 # gcc-specs-directive()
235 # Note; later specs normally overwrite earlier ones; however if a later
236 # spec starts with '+' then it appends.
237 # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
238 # as "Reading <file>", in order. Strictly speaking, if there's a
239 # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
240 # the same token anything from 'gcc -dumpspecs' is overridden by
241 # the contents of $(gcc_install_dir)/specs so the result is the
242 # same either way.
243 _gcc-specs-directive_raw() {
244 local cc=$(tc-getCC)
245 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
246 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
247 'BEGIN { pspec=""; spec=""; outside=1 }
248 $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
249 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
250 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
251 { spec=spec $0 }
252 END { print spec }'
253 return 0
254 }
255
256 # Return the requested gcc specs directive, with all included
257 # specs expanded.
258 # Note, it does not check for inclusion loops, which cause it
259 # to never finish - but such loops are invalid for gcc and we're
260 # assuming gcc is operational.
261 gcc-specs-directive() {
262 local directive subdname subdirective
263 directive="$(_gcc-specs-directive_raw $1)"
264 while [[ ${directive} == *%\(*\)* ]]; do
265 subdname=${directive/*%\(}
266 subdname=${subdname/\)*}
267 subdirective="$(_gcc-specs-directive_raw ${subdname})"
268 directive="${directive//\%(${subdname})/${subdirective}}"
269 done
270 echo "${directive}"
271 return 0
272 }
273
274 # Returns true if gcc sets relro
275 gcc-specs-relro() {
276 local directive
277 directive=$(gcc-specs-directive link_command)
278 return $([[ ${directive/\{!norelro:} != ${directive} ]])
279 }
280 # Returns true if gcc sets now
281 gcc-specs-now() {
282 local directive
283 directive=$(gcc-specs-directive link_command)
284 return $([[ ${directive/\{!nonow:} != ${directive} ]])
285 }
286 # Returns true if gcc builds PIEs
287 gcc-specs-pie() {
288 local directive
289 directive=$(gcc-specs-directive cc1)
290 return $([[ ${directive/\{!nopie:} != ${directive} ]])
291 }
292 # Returns true if gcc builds with the stack protector
293 gcc-specs-ssp() {
294 local directive
295 directive=$(gcc-specs-directive cc1)
296 return $([[ ${directive/\{!fno-stack-protector:} != ${directive} ]])
297 }
298 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
299 gcc-specs-ssp-to-all() {
300 local directive
301 directive=$(gcc-specs-directive cc1)
302 return $([[ ${directive/\{!fno-stack-protector-all:} != ${directive} ]])
303 }
304
305
306 # This function generate linker scripts in /usr/lib for dynamic
307 # libs in /lib. This is to fix linking problems when you have
308 # the .so in /lib, and the .a in /usr/lib. What happens is that
309 # in some cases when linking dynamic, the .a in /usr/lib is used
310 # instead of the .so in /lib due to gcc/libtool tweaking ld's
311 # library search path. This cause many builds to fail.
312 # See bug #4411 for more info.
313 #
314 # To use, simply call:
315 #
316 # gen_usr_ldscript libfoo.so
317 #
318 # Note that you should in general use the unversioned name of
319 # the library, as ldconfig should usually update it correctly
320 # to point to the latest version of the library present.
321 gen_usr_ldscript() {
322 local lib libdir=$(get_libdir) output_format=""
323 # Just make sure it exists
324 dodir /usr/${libdir}
325
326 # OUTPUT_FORMAT gives hints to the linker as to what binary format
327 # is referenced ... makes multilib saner
328 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
329 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
330
331 for lib in "$@" ; do
332 if [[ ${USERLAND} == "Darwin" ]] ; then
333 ewarn "Not creating fake dynamic library for $lib on Darwin;"
334 ewarn "making a symlink instead."
335 dosym "/${libdir}/${lib}" "/usr/${libdir}/${lib}"
336 else
337 cat > "${D}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
338 /* GNU ld script
339 Since Gentoo has critical dynamic libraries
340 in /lib, and the static versions in /usr/lib,
341 we need to have a "fake" dynamic lib in /usr/lib,
342 otherwise we run into linking problems.
343
344 See bug http://bugs.gentoo.org/4411 for more info.
345 */
346 ${output_format}
347 GROUP ( /${libdir}/${lib} )
348 END_LDSCRIPT
349 fi
350 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
351 done
352 }

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