/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.70 - (show annotations) (download)
Sat Jun 16 07:11:43 2007 UTC (7 years, 6 months ago) by vapier
Branch: MAIN
Changes since 1.69: +2 -3 lines
finish gen_usr_ldscript to toolchain-funcs from eutils

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 1.69 2007/03/27 01:46:50 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 $@
174 }
175
176 # Returns the version as by `$CC -dumpversion`
177 gcc-fullversion() {
178 $(tc-getCC "$@") -dumpversion
179 }
180 # Returns the version, but only the <major>.<minor>
181 gcc-version() {
182 gcc-fullversion "$@" | cut -f1,2 -d.
183 }
184 # Returns the Major version
185 gcc-major-version() {
186 gcc-version "$@" | cut -f1 -d.
187 }
188 # Returns the Minor version
189 gcc-minor-version() {
190 gcc-version "$@" | cut -f2 -d.
191 }
192 # Returns the Micro version
193 gcc-micro-version() {
194 gcc-fullversion "$@" | cut -f3 -d. | cut -f1 -d-
195 }
196 # Returns the installation directory - internal toolchain
197 # function for use by _gcc-specs-exists (for flag-o-matic).
198 _gcc-install-dir() {
199 echo "$($(tc-getCC) -print-search-dirs 2> /dev/null |\
200 awk '$1=="install:" {print $2}')"
201 }
202 # Returns true if the indicated specs file exists - internal toolchain
203 # function for use by flag-o-matic.
204 _gcc-specs-exists() {
205 [[ -f $(_gcc-install-dir)/$1 ]]
206 }
207
208 # Returns requested gcc specs directive unprocessed - for used by
209 # gcc-specs-directive()
210 # Note; later specs normally overwrite earlier ones; however if a later
211 # spec starts with '+' then it appends.
212 # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
213 # as "Reading <file>", in order. Strictly speaking, if there's a
214 # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
215 # the same token anything from 'gcc -dumpspecs' is overridden by
216 # the contents of $(gcc_install_dir)/specs so the result is the
217 # same either way.
218 _gcc-specs-directive_raw() {
219 local cc=$(tc-getCC)
220 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
221 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
222 'BEGIN { pspec=""; spec=""; outside=1 }
223 $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
224 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
225 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
226 { spec=spec $0 }
227 END { print spec }'
228 return 0
229 }
230
231 # Return the requested gcc specs directive, with all included
232 # specs expanded.
233 # Note, it does not check for inclusion loops, which cause it
234 # to never finish - but such loops are invalid for gcc and we're
235 # assuming gcc is operational.
236 gcc-specs-directive() {
237 local directive subdname subdirective
238 directive="$(_gcc-specs-directive_raw $1)"
239 while [[ ${directive} == *%\(*\)* ]]; do
240 subdname=${directive/*%\(}
241 subdname=${subdname/\)*}
242 subdirective="$(_gcc-specs-directive_raw ${subdname})"
243 directive="${directive//\%(${subdname})/${subdirective}}"
244 done
245 echo "${directive}"
246 return 0
247 }
248
249 # Returns true if gcc sets relro
250 gcc-specs-relro() {
251 local directive
252 directive=$(gcc-specs-directive link_command)
253 return $([[ ${directive/\{!norelro:} != ${directive} ]])
254 }
255 # Returns true if gcc sets now
256 gcc-specs-now() {
257 local directive
258 directive=$(gcc-specs-directive link_command)
259 return $([[ ${directive/\{!nonow:} != ${directive} ]])
260 }
261 # Returns true if gcc builds PIEs
262 gcc-specs-pie() {
263 local directive
264 directive=$(gcc-specs-directive cc1)
265 return $([[ ${directive/\{!nopie:} != ${directive} ]])
266 }
267 # Returns true if gcc builds with the stack protector
268 gcc-specs-ssp() {
269 local directive
270 directive=$(gcc-specs-directive cc1)
271 return $([[ ${directive/\{!fno-stack-protector:} != ${directive} ]])
272 }
273 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
274 gcc-specs-ssp-to-all() {
275 local directive
276 directive=$(gcc-specs-directive cc1)
277 return $([[ ${directive/\{!fno-stack-protector-all:} != ${directive} ]])
278 }
279
280
281 # This function generate linker scripts in /usr/lib for dynamic
282 # libs in /lib. This is to fix linking problems when you have
283 # the .so in /lib, and the .a in /usr/lib. What happens is that
284 # in some cases when linking dynamic, the .a in /usr/lib is used
285 # instead of the .so in /lib due to gcc/libtool tweaking ld's
286 # library search path. This cause many builds to fail.
287 # See bug #4411 for more info.
288 #
289 # To use, simply call:
290 #
291 # gen_usr_ldscript libfoo.so
292 #
293 # Note that you should in general use the unversioned name of
294 # the library, as ldconfig should usually update it correctly
295 # to point to the latest version of the library present.
296 gen_usr_ldscript() {
297 local lib libdir=$(get_libdir) output_format=""
298 # Just make sure it exists
299 dodir /usr/${libdir}
300
301 # OUTPUT_FORMAT gives hints to the linker as to what binary format
302 # is referenced ... makes multilib saner
303 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
304 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
305
306 for lib in "$@" ; do
307 if [[ ${USERLAND} == "Darwin" ]] ; then
308 ewarn "Not creating fake dynamic library for $lib on Darwin;"
309 ewarn "making a symlink instead."
310 dosym "/${libdir}/${lib}" "/usr/${libdir}/${lib}"
311 else
312 cat > "${D}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
313 /* GNU ld script
314 Since Gentoo has critical dynamic libraries
315 in /lib, and the static versions in /usr/lib,
316 we need to have a "fake" dynamic lib in /usr/lib,
317 otherwise we run into linking problems.
318
319 See bug http://bugs.gentoo.org/4411 for more info.
320 */
321 ${output_format}
322 GROUP ( /${libdir}/${lib} )
323 END_LDSCRIPT
324 fi
325 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
326 done
327 }

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