/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.68 - (show annotations) (download)
Thu Mar 15 15:55:59 2007 UTC (7 years, 4 months ago) by kevquinn
Branch: MAIN
Changes since 1.67: +38 -4 lines
Upgrade gcc-specs-directive to handle spec string substitutions.

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 1.67 2007/03/04 21:03:58 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 inherit multilib
11
12 DESCRIPTION="Based on the ${ECLASS} eclass"
13
14 tc-getPROG() {
15 local var=$1
16 local prog=$2
17
18 if [[ -n ${!var} ]] ; then
19 echo "${!var}"
20 return 0
21 fi
22
23 local search=
24 [[ -n $3 ]] && search=$(type -p "$3-${prog}")
25 [[ -z ${search} && -n ${CHOST} ]] && search=$(type -p "${CHOST}-${prog}")
26 [[ -n ${search} ]] && prog=${search##*/}
27
28 export ${var}=${prog}
29 echo "${!var}"
30 }
31
32 # Returns the name of the archiver
33 tc-getAR() { tc-getPROG AR ar "$@"; }
34 # Returns the name of the assembler
35 tc-getAS() { tc-getPROG AS as "$@"; }
36 # Returns the name of the C compiler
37 tc-getCC() { tc-getPROG CC gcc "$@"; }
38 # Returns the name of the C preprocessor
39 tc-getCPP() { tc-getPROG CPP cpp "$@"; }
40 # Returns the name of the C++ compiler
41 tc-getCXX() { tc-getPROG CXX g++ "$@"; }
42 # Returns the name of the linker
43 tc-getLD() { tc-getPROG LD ld "$@"; }
44 # Returns the name of the strip prog
45 tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
46 # Returns the name of the symbol/object thingy
47 tc-getNM() { tc-getPROG NM nm "$@"; }
48 # Returns the name of the archiver indexer
49 tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
50 # Returns the name of the fortran 77 compiler
51 tc-getF77() { tc-getPROG F77 f77 "$@"; }
52 # Returns the name of the fortran 90 compiler
53 tc-getF90() { tc-getPROG F90 gfortran "$@"; }
54 # Returns the name of the fortran compiler
55 tc-getFORTRAN() { tc-getPROG FORTRAN gfortran "$@"; }
56 # Returns the name of the java compiler
57 tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
58
59 # Returns the name of the C compiler for build
60 tc-getBUILD_CC() {
61 local v
62 for v in CC_FOR_BUILD BUILD_CC HOSTCC ; do
63 if [[ -n ${!v} ]] ; then
64 export BUILD_CC=${!v}
65 echo "${!v}"
66 return 0
67 fi
68 done
69
70 local search=
71 if [[ -n ${CBUILD} ]] ; then
72 search=$(type -p ${CBUILD}-gcc)
73 search=${search##*/}
74 fi
75 search=${search:-gcc}
76
77 export BUILD_CC=${search}
78 echo "${search}"
79 }
80
81 # Quick way to export a bunch of vars at once
82 tc-export() {
83 local var
84 for var in "$@" ; do
85 eval tc-get${var} > /dev/null
86 done
87 }
88
89 # A simple way to see if we're using a cross-compiler ...
90 tc-is-cross-compiler() {
91 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
92 }
93
94 # See if this toolchain is a softfloat based one.
95 # The possible return values:
96 # - only: the target is always softfloat (never had fpu)
97 # - yes: the target should support softfloat
98 # - no: the target should support hardfloat
99 # This allows us to react differently where packages accept
100 # softfloat flags in the case where support is optional, but
101 # rejects softfloat flags where the target always lacks an fpu.
102 tc-is-softfloat() {
103 case ${CTARGET} in
104 bfin*|h8300*)
105 echo "only" ;;
106 *)
107 [[ ${CTARGET//_/-} == *-softfloat-* ]] \
108 && echo "yes" \
109 || echo "no"
110 ;;
111 esac
112 }
113
114 # Parse information from CBUILD/CHOST/CTARGET rather than
115 # use external variables from the profile.
116 tc-ninja_magic_to_arch() {
117 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
118
119 local type=$1
120 local host=$2
121 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
122
123 case ${host} in
124 alpha*) echo alpha;;
125 arm*) echo arm;;
126 bfin*) ninj blackfin bfin;;
127 cris*) echo cris;;
128 hppa*) ninj parisc hppa;;
129 i?86*) ninj i386 x86;;
130 ia64*) echo ia64;;
131 m68*) echo m68k;;
132 mips*) echo mips;;
133 nios2*) echo nios2;;
134 nios*) echo nios;;
135 powerpc*)
136 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
137 # have been unified into simply 'powerpc', but until 2.6.16,
138 # ppc32 is still using ARCH="ppc" as default
139 if [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] && [[ ${type} == "kern" ]] ; then
140 echo powerpc
141 elif [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] && [[ ${type} == "kern" ]] ; then
142 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
143 echo powerpc
144 else
145 echo ppc
146 fi
147 elif [[ ${host} == powerpc64* ]] ; then
148 echo ppc64
149 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
150 ninj ppc64 ppc
151 else
152 echo ppc
153 fi
154 ;;
155 s390*) echo s390;;
156 sh64*) ninj sh64 sh;;
157 sh*) echo sh;;
158 sparc64*) ninj sparc64 sparc;;
159 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
160 && ninj sparc64 sparc \
161 || echo sparc
162 ;;
163 vax*) echo vax;;
164 x86_64*) ninj x86_64 amd64;;
165 *) echo ${ARCH};;
166 esac
167 }
168 tc-arch-kernel() {
169 tc-ninja_magic_to_arch kern $@
170 }
171 tc-arch() {
172 tc-ninja_magic_to_arch portage $@
173 }
174
175 # Returns the version as by `$CC -dumpversion`
176 gcc-fullversion() {
177 $(tc-getCC "$@") -dumpversion
178 }
179 # Returns the version, but only the <major>.<minor>
180 gcc-version() {
181 gcc-fullversion "$@" | cut -f1,2 -d.
182 }
183 # Returns the Major version
184 gcc-major-version() {
185 gcc-version "$@" | cut -f1 -d.
186 }
187 # Returns the Minor version
188 gcc-minor-version() {
189 gcc-version "$@" | cut -f2 -d.
190 }
191 # Returns the Micro version
192 gcc-micro-version() {
193 gcc-fullversion "$@" | cut -f3 -d. | cut -f1 -d-
194 }
195 # Returns the installation directory - internal toolchain
196 # function for use by _gcc-specs-exists (for flag-o-matic).
197 _gcc-install-dir() {
198 echo "$($(tc-getCC) -print-search-dirs 2> /dev/null |\
199 awk '$1=="install:" {print $2}')"
200 }
201 # Returns true if the indicated specs file exists - internal toolchain
202 # function for use by flag-o-matic.
203 _gcc-specs-exists() {
204 [[ -f $(_gcc-install-dir)/$1 ]]
205 }
206
207 # Returns requested gcc specs directive unprocessed - for used by
208 # gcc-specs-directive()
209 # Note; later specs normally overwrite earlier ones; however if a later
210 # spec starts with '+' then it appends.
211 # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
212 # as "Reading <file>", in order. Strictly speaking, if there's a
213 # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
214 # the same token anything from 'gcc -dumpspecs' is overridden by
215 # the contents of $(gcc_install_dir)/specs so the result is the
216 # same either way.
217 _gcc-specs-directive_raw() {
218 local cc=$(tc-getCC)
219 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
220 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
221 'BEGIN { pspec=""; spec=""; outside=1 }
222 $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
223 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
224 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
225 { spec=spec $0 }
226 END { print spec }'
227 return 0
228 }
229
230 # Return the requested gcc specs directive, with all included
231 # specs expanded.
232 # Note, it does not check for inclusion loops, which cause it
233 # to never finish - but such loops are invalid for gcc and we're
234 # assuming gcc is operational.
235 gcc-specs-directive() {
236 local directive subdname subdirective
237 directive="$(_gcc-specs-directive_raw $1)"
238 while [[ ${directive} == *%\(*\)* ]]; do
239 subdname=${directive/*%\(}
240 subdname=${subdname/\)*}
241 subdirective="$(_gcc-specs-directive_raw ${subdname})"
242 directive="${directive//\%(${subdname})/${subdirective}}"
243 done
244 echo "${directive}"
245 return 0
246 }
247
248 # Returns true if gcc sets relro
249 gcc-specs-relro() {
250 local directive
251 directive=$(gcc-specs-directive link_command)
252 return $([[ ${directive/\{!norelro:} != ${directive} ]])
253 }
254 # Returns true if gcc sets now
255 gcc-specs-now() {
256 local directive
257 directive=$(gcc-specs-directive link_command)
258 return $([[ ${directive/\{!nonow:} != ${directive} ]])
259 }
260 # Returns true if gcc builds PIEs
261 gcc-specs-pie() {
262 local directive
263 directive=$(gcc-specs-directive cc1)
264 return $([[ ${directive/\{!nopie:} != ${directive} ]])
265 }
266 # Returns true if gcc builds with the stack protector
267 gcc-specs-ssp() {
268 local directive
269 directive=$(gcc-specs-directive cc1)
270 return $([[ ${directive/\{!fno-stack-protector:} != ${directive} ]])
271 }
272 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
273 gcc-specs-ssp-to-all() {
274 local directive
275 directive=$(gcc-specs-directive cc1)
276 return $([[ ${directive/\{!fno-stack-protector-all:} != ${directive} ]])
277 }
278
279
280 # This function generate linker scripts in /usr/lib for dynamic
281 # libs in /lib. This is to fix linking problems when you have
282 # the .so in /lib, and the .a in /usr/lib. What happens is that
283 # in some cases when linking dynamic, the .a in /usr/lib is used
284 # instead of the .so in /lib due to gcc/libtool tweaking ld's
285 # library search path. This cause many builds to fail.
286 # See bug #4411 for more info.
287 #
288 # To use, simply call:
289 #
290 # gen_usr_ldscript libfoo.so
291 #
292 # Note that you should in general use the unversioned name of
293 # the library, as ldconfig should usually update it correctly
294 # to point to the latest version of the library present.
295 _tc_gen_usr_ldscript() {
296 local lib libdir=$(get_libdir) output_format=""
297 # Just make sure it exists
298 dodir /usr/${libdir}
299
300 # OUTPUT_FORMAT gives hints to the linker as to what binary format
301 # is referenced ... makes multilib saner
302 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
303 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
304
305 for lib in "$@" ; do
306 if [[ ${USERLAND} == "Darwin" ]] ; then
307 ewarn "Not creating fake dynamic library for $lib on Darwin;"
308 ewarn "making a symlink instead."
309 dosym "/${libdir}/${lib}" "/usr/${libdir}/${lib}"
310 else
311 cat > "${D}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
312 /* GNU ld script
313 Since Gentoo has critical dynamic libraries
314 in /lib, and the static versions in /usr/lib,
315 we need to have a "fake" dynamic lib in /usr/lib,
316 otherwise we run into linking problems.
317
318 See bug http://bugs.gentoo.org/4411 for more info.
319 */
320 ${output_format}
321 GROUP ( /${libdir}/${lib} )
322 END_LDSCRIPT
323 fi
324 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
325 done
326 }
327 gen_usr_ldscript() { _tc_gen_usr_ldscript "$@" ; }

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