/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Contents of /eclass/toolchain-funcs.eclass

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Revision 1.61 - (show annotations) (download)
Sun Sep 24 07:20:33 2006 UTC (8 years, 1 month ago) by grobian
Branch: MAIN
Changes since 1.60: +20 -13 lines
The Darwin linker doesn't understand GNU ld scripts, instead it has no
problems with symlinks.

1 # Copyright 1999-2006 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 1.60 2006/08/19 13:52:02 vapier Exp $
4 #
5 # Author: 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
95 # Parse information from CBUILD/CHOST/CTARGET rather than
96 # use external variables from the profile.
97 tc-ninja_magic_to_arch() {
98 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
99
100 local type=$1
101 local host=$2
102 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
103
104 case ${host} in
105 alpha*) echo alpha;;
106 arm*) echo arm;;
107 bfin*) ninj blackfin bfin;;
108 cris*) echo cris;;
109 hppa*) ninj parisc hppa;;
110 i?86*) ninj i386 x86;;
111 ia64*) echo ia64;;
112 m68*) echo m68k;;
113 mips*) echo mips;;
114 nios2*) echo nios2;;
115 nios*) echo nios;;
116 powerpc*)
117 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
118 # have been unified into simply 'powerpc', but until 2.6.16,
119 # ppc32 is still using ARCH="ppc" as default
120 if [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] && [[ ${type} == "kern" ]] ; then
121 echo powerpc
122 elif [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] && [[ ${type} == "kern" ]] ; then
123 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
124 echo powerpc
125 else
126 echo ppc
127 fi
128 elif [[ ${host} == powerpc64* ]] ; then
129 echo ppc64
130 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
131 ninj ppc64 ppc
132 else
133 echo ppc
134 fi
135 ;;
136 s390*) echo s390;;
137 sh64*) ninj sh64 sh;;
138 sh*) echo sh;;
139 sparc64*) ninj sparc64 sparc;;
140 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
141 && ninj sparc64 sparc \
142 || echo sparc
143 ;;
144 vax*) echo vax;;
145 x86_64*) ninj x86_64 amd64;;
146 *) echo ${ARCH};;
147 esac
148 }
149 tc-arch-kernel() {
150 tc-ninja_magic_to_arch kern $@
151 }
152 tc-arch() {
153 tc-ninja_magic_to_arch portage $@
154 }
155 tc-endian() {
156 local host=$1
157 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
158 host=${host%%-*}
159
160 case ${host} in
161 alpha*) echo big;;
162 arm*b*) echo big;;
163 arm*) echo little;;
164 cris*) echo little;;
165 hppa*) echo big;;
166 i?86*) echo little;;
167 ia64*) echo little;;
168 m68*) echo big;;
169 mips*l*) echo little;;
170 mips*) echo big;;
171 powerpc*) echo big;;
172 s390*) echo big;;
173 sh*b*) echo big;;
174 sh*) echo little;;
175 sparc*) echo big;;
176 x86_64*) echo little;;
177 *) echo wtf;;
178 esac
179 }
180
181 # Returns the version as by `$CC -dumpversion`
182 gcc-fullversion() {
183 echo "$($(tc-getCC) -dumpversion)"
184 }
185 # Returns the version, but only the <major>.<minor>
186 gcc-version() {
187 echo "$(gcc-fullversion | cut -f1,2 -d.)"
188 }
189 # Returns the Major version
190 gcc-major-version() {
191 echo "$(gcc-version | cut -f1 -d.)"
192 }
193 # Returns the Minor version
194 gcc-minor-version() {
195 echo "$(gcc-version | cut -f2 -d.)"
196 }
197 # Returns the Micro version
198 gcc-micro-version() {
199 echo "$(gcc-fullversion | cut -f3 -d. | cut -f1 -d-)"
200 }
201
202 # Returns requested gcc specs directive
203 # Note; later specs normally overwrite earlier ones; however if a later
204 # spec starts with '+' then it appends.
205 # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
206 # as "Reading <file>", in order.
207 gcc-specs-directive() {
208 local cc=$(tc-getCC)
209 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
210 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
211 'BEGIN { pspec=""; spec=""; outside=1 }
212 $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
213 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
214 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
215 { spec=spec $0 }
216 END { print spec }'
217 return 0
218 }
219
220 # Returns true if gcc sets relro
221 gcc-specs-relro() {
222 local directive
223 directive=$(gcc-specs-directive link_command)
224 return $([[ ${directive/\{!norelro:} != ${directive} ]])
225 }
226 # Returns true if gcc sets now
227 gcc-specs-now() {
228 local directive
229 directive=$(gcc-specs-directive link_command)
230 return $([[ ${directive/\{!nonow:} != ${directive} ]])
231 }
232 # Returns true if gcc builds PIEs
233 gcc-specs-pie() {
234 local directive
235 directive=$(gcc-specs-directive cc1)
236 return $([[ ${directive/\{!nopie:} != ${directive} ]])
237 }
238 # Returns true if gcc builds with the stack protector
239 gcc-specs-ssp() {
240 local directive
241 directive=$(gcc-specs-directive cc1)
242 return $([[ ${directive/\{!fno-stack-protector:} != ${directive} ]])
243 }
244 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
245 gcc-specs-ssp-to-all() {
246 local directive
247 directive=$(gcc-specs-directive cc1)
248 return $([[ ${directive/\{!fno-stack-protector-all:} != ${directive} ]])
249 }
250
251
252 # This function generate linker scripts in /usr/lib for dynamic
253 # libs in /lib. This is to fix linking problems when you have
254 # the .so in /lib, and the .a in /usr/lib. What happens is that
255 # in some cases when linking dynamic, the .a in /usr/lib is used
256 # instead of the .so in /lib due to gcc/libtool tweaking ld's
257 # library search path. This cause many builds to fail.
258 # See bug #4411 for more info.
259 #
260 # To use, simply call:
261 #
262 # gen_usr_ldscript libfoo.so
263 #
264 # Note that you should in general use the unversioned name of
265 # the library, as ldconfig should usually update it correctly
266 # to point to the latest version of the library present.
267 _tc_gen_usr_ldscript() {
268 local lib libdir=$(get_libdir) output_format=""
269 # Just make sure it exists
270 dodir /usr/${libdir}
271
272 # OUTPUT_FORMAT gives hints to the linker as to what binary format
273 # is referenced ... makes multilib saner
274 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
275 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
276
277 for lib in "$@" ; do
278 if [[ ${USERLAND} == "Darwin" ]];
279 then
280 ewarn "Not creating fake dynamic library for $lib on Darwin,"
281 ewarn "making a symlink instead."
282 dosym "/${libdir}/${lib}" "/usr/${libdir}/${lib}"
283 else
284 cat > "${D}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
285 /* GNU ld script
286 Since Gentoo has critical dynamic libraries
287 in /lib, and the static versions in /usr/lib,
288 we need to have a "fake" dynamic lib in /usr/lib,
289 otherwise we run into linking problems.
290
291 See bug http://bugs.gentoo.org/4411 for more info.
292 */
293 ${output_format}
294 GROUP ( /${libdir}/${lib} )
295 END_LDSCRIPT
296 fi
297 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
298 done
299 }
300 gen_usr_ldscript() { _tc_gen_usr_ldscript "$@" ; }

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