/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.80 - (hide annotations) (download)
Fri Jan 2 22:14:18 2009 UTC (5 years, 8 months ago) by gengor
Branch: MAIN
Changes since 1.79: +7 -1 lines
Add some fno-strict-overflow stuff we missed. Thanks Magnus Granberg (Zorry).

1 vapier 1.67 # Copyright 1999-2007 Gentoo Foundation
2 vapier 1.1 # Distributed under the terms of the GNU General Public License v2
3 gengor 1.80 # $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.79 2008/09/16 06:40:21 vapier Exp $
4 vapier 1.74
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 vapier 1.1
16 vapier 1.69 ___ECLASS_RECUR_TOOLCHAIN_FUNCS="yes"
17     [[ -z ${___ECLASS_RECUR_MULTILIB} ]] && inherit multilib
18 eradicator 1.34
19 vapier 1.1 DESCRIPTION="Based on the ${ECLASS} eclass"
20    
21     tc-getPROG() {
22 vapier 1.33 local var=$1
23     local prog=$2
24 vapier 1.1
25 vapier 1.17 if [[ -n ${!var} ]] ; then
26 vapier 1.1 echo "${!var}"
27     return 0
28     fi
29    
30 eradicator 1.35 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 vapier 1.1
35 vapier 1.17 export ${var}=${prog}
36 vapier 1.1 echo "${!var}"
37     }
38    
39 vapier 1.74 # @FUNCTION: tc-getAR
40     # @USAGE: [toolchain prefix]
41     # @RETURN: name of the archiver
42 vapier 1.33 tc-getAR() { tc-getPROG AR ar "$@"; }
43 vapier 1.74 # @FUNCTION: tc-getAS
44     # @USAGE: [toolchain prefix]
45     # @RETURN: name of the assembler
46 vapier 1.33 tc-getAS() { tc-getPROG AS as "$@"; }
47 vapier 1.74 # @FUNCTION: tc-getCC
48     # @USAGE: [toolchain prefix]
49     # @RETURN: name of the C compiler
50 vapier 1.33 tc-getCC() { tc-getPROG CC gcc "$@"; }
51 vapier 1.74 # @FUNCTION: tc-getCPP
52     # @USAGE: [toolchain prefix]
53     # @RETURN: name of the C preprocessor
54 robbat2 1.58 tc-getCPP() { tc-getPROG CPP cpp "$@"; }
55 vapier 1.74 # @FUNCTION: tc-getCXX
56     # @USAGE: [toolchain prefix]
57     # @RETURN: name of the C++ compiler
58 vapier 1.33 tc-getCXX() { tc-getPROG CXX g++ "$@"; }
59 vapier 1.74 # @FUNCTION: tc-getLD
60     # @USAGE: [toolchain prefix]
61     # @RETURN: name of the linker
62 vapier 1.33 tc-getLD() { tc-getPROG LD ld "$@"; }
63 vapier 1.74 # @FUNCTION: tc-getSTRIP
64     # @USAGE: [toolchain prefix]
65     # @RETURN: name of the strip program
66 kanaka 1.59 tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
67 vapier 1.74 # @FUNCTION: tc-getNM
68     # @USAGE: [toolchain prefix]
69     # @RETURN: name of the symbol/object thingy
70 vapier 1.33 tc-getNM() { tc-getPROG NM nm "$@"; }
71 vapier 1.74 # @FUNCTION: tc-getRANLIB
72     # @USAGE: [toolchain prefix]
73     # @RETURN: name of the archiver indexer
74 vapier 1.33 tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
75 vapier 1.74 # @FUNCTION: tc-getF77
76     # @USAGE: [toolchain prefix]
77     # @RETURN: name of the Fortran 77 compiler
78 kanaka 1.59 tc-getF77() { tc-getPROG F77 f77 "$@"; }
79 dberkholz 1.78 # @FUNCTION: tc-getFC
80 vapier 1.74 # @USAGE: [toolchain prefix]
81     # @RETURN: name of the Fortran 90 compiler
82 dberkholz 1.78 tc-getFC() { tc-getPROG FC gfortran "$@"; }
83 vapier 1.74 # @FUNCTION: tc-getGCJ
84     # @USAGE: [toolchain prefix]
85     # @RETURN: name of the java compiler
86 vapier 1.33 tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
87 vapier 1.1
88 vapier 1.74 # @FUNCTION: tc-getBUILD_CC
89     # @USAGE: [toolchain prefix]
90     # @RETURN: name of the C compiler for building binaries to run on the build machine
91 vapier 1.4 tc-getBUILD_CC() {
92 vapier 1.43 local v
93     for v in CC_FOR_BUILD BUILD_CC HOSTCC ; do
94     if [[ -n ${!v} ]] ; then
95     export BUILD_CC=${!v}
96     echo "${!v}"
97     return 0
98     fi
99     done
100 vapier 1.4
101 vapier 1.9 local search=
102 vapier 1.17 if [[ -n ${CBUILD} ]] ; then
103 vapier 1.21 search=$(type -p ${CBUILD}-gcc)
104 vapier 1.17 search=${search##*/}
105 vapier 1.9 fi
106 vapier 1.45 search=${search:-gcc}
107 vapier 1.11
108 vapier 1.17 export BUILD_CC=${search}
109 vapier 1.11 echo "${search}"
110 vapier 1.4 }
111 vapier 1.1
112 vapier 1.74 # @FUNCTION: tc-export
113     # @USAGE: <list of toolchain variables>
114     # @DESCRIPTION:
115     # Quick way to export a bunch of compiler vars at once.
116 vapier 1.10 tc-export() {
117     local var
118     for var in "$@" ; do
119 vapier 1.79 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
120 vapier 1.36 eval tc-get${var} > /dev/null
121 vapier 1.10 done
122     }
123    
124 vapier 1.74 # @FUNCTION: tc-is-cross-compiler
125     # @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
126 vapier 1.12 tc-is-cross-compiler() {
127 vapier 1.43 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
128 vapier 1.12 }
129    
130 vapier 1.74 # @FUNCTION: tc-is-softfloat
131     # @DESCRIPTION:
132 vapier 1.65 # See if this toolchain is a softfloat based one.
133 vapier 1.74 # @CODE
134 vapier 1.65 # The possible return values:
135     # - only: the target is always softfloat (never had fpu)
136     # - yes: the target should support softfloat
137     # - no: the target should support hardfloat
138 vapier 1.74 # @CODE
139 vapier 1.65 # This allows us to react differently where packages accept
140     # softfloat flags in the case where support is optional, but
141     # rejects softfloat flags where the target always lacks an fpu.
142     tc-is-softfloat() {
143     case ${CTARGET} in
144 vapier 1.66 bfin*|h8300*)
145 vapier 1.65 echo "only" ;;
146     *)
147     [[ ${CTARGET//_/-} == *-softfloat-* ]] \
148     && echo "yes" \
149     || echo "no"
150     ;;
151     esac
152     }
153 vapier 1.1
154 swegener 1.40 # Parse information from CBUILD/CHOST/CTARGET rather than
155 vapier 1.20 # use external variables from the profile.
156     tc-ninja_magic_to_arch() {
157 vapier 1.21 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
158 vapier 1.19
159     local type=$1
160     local host=$2
161 eradicator 1.25 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
162 vapier 1.19
163     case ${host} in
164     alpha*) echo alpha;;
165     arm*) echo arm;;
166 vapier 1.72 avr*) ninj avr32 avr;;
167 vapier 1.53 bfin*) ninj blackfin bfin;;
168 vapier 1.47 cris*) echo cris;;
169 vapier 1.19 hppa*) ninj parisc hppa;;
170 vapier 1.75 i?86*)
171     # Starting with linux-2.6.24, the 'x86_64' and 'i386'
172     # trees have been unified into 'x86'.
173 aballier 1.77 # FreeBSD still uses i386
174     if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
175 vapier 1.75 echo i386
176     else
177     echo x86
178     fi
179     ;;
180 vapier 1.19 ia64*) echo ia64;;
181 vapier 1.23 m68*) echo m68k;;
182 vapier 1.19 mips*) echo mips;;
183 vapier 1.52 nios2*) echo nios2;;
184     nios*) echo nios;;
185 vapier 1.49 powerpc*)
186     # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
187 josejx 1.54 # have been unified into simply 'powerpc', but until 2.6.16,
188     # ppc32 is still using ARCH="ppc" as default
189     if [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] && [[ ${type} == "kern" ]] ; then
190 vapier 1.49 echo powerpc
191 josejx 1.54 elif [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] && [[ ${type} == "kern" ]] ; then
192 dostrow 1.55 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
193 josejx 1.54 echo powerpc
194     else
195     echo ppc
196 swegener 1.56 fi
197 vapier 1.49 elif [[ ${host} == powerpc64* ]] ; then
198     echo ppc64
199 dostrow 1.51 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
200     ninj ppc64 ppc
201 vapier 1.49 else
202     echo ppc
203     fi
204 dostrow 1.37 ;;
205 vapier 1.47 s390*) echo s390;;
206     sh64*) ninj sh64 sh;;
207     sh*) echo sh;;
208 vapier 1.19 sparc64*) ninj sparc64 sparc;;
209 vapier 1.28 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
210     && ninj sparc64 sparc \
211     || echo sparc
212     ;;
213 vapier 1.47 vax*) echo vax;;
214 vapier 1.75 x86_64*)
215     # Starting with linux-2.6.24, the 'x86_64' and 'i386'
216     # trees have been unified into 'x86'.
217     if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
218     echo x86
219     else
220     ninj x86_64 amd64
221     fi
222     ;;
223 vapier 1.73
224     # since our usage of tc-arch is largely concerned with
225     # normalizing inputs for testing ${CTARGET}, let's filter
226     # other cross targets (mingw and such) into the unknown.
227     *) echo unknown;;
228 vapier 1.19 esac
229     }
230 vapier 1.74 # @FUNCTION: tc-arch-kernel
231     # @USAGE: [toolchain prefix]
232     # @RETURN: name of the kernel arch according to the compiler target
233 vapier 1.20 tc-arch-kernel() {
234 vapier 1.74 tc-ninja_magic_to_arch kern "$@"
235 vapier 1.19 }
236 vapier 1.74 # @FUNCTION: tc-arch
237     # @USAGE: [toolchain prefix]
238     # @RETURN: name of the portage arch according to the compiler target
239 vapier 1.20 tc-arch() {
240 vapier 1.74 tc-ninja_magic_to_arch portage "$@"
241 vapier 1.19 }
242 vapier 1.74
243 robbat2 1.71 tc-endian() {
244     local host=$1
245     [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
246     host=${host%%-*}
247    
248     case ${host} in
249     alpha*) echo big;;
250     arm*b*) echo big;;
251     arm*) echo little;;
252     cris*) echo little;;
253     hppa*) echo big;;
254     i?86*) echo little;;
255     ia64*) echo little;;
256     m68*) echo big;;
257     mips*l*) echo little;;
258     mips*) echo big;;
259     powerpc*) echo big;;
260     s390*) echo big;;
261     sh*b*) echo big;;
262     sh*) echo little;;
263     sparc*) echo big;;
264     x86_64*) echo little;;
265     *) echo wtf;;
266     esac
267     }
268 vapier 1.19
269 vapier 1.74 # @FUNCTION: gcc-fullversion
270     # @RETURN: compiler version (major.minor.micro: [3.4.6])
271 vapier 1.1 gcc-fullversion() {
272 vapier 1.63 $(tc-getCC "$@") -dumpversion
273 vapier 1.1 }
274 vapier 1.74 # @FUNCTION: gcc-version
275     # @RETURN: compiler version (major.minor: [3.4].6)
276 vapier 1.1 gcc-version() {
277 vapier 1.63 gcc-fullversion "$@" | cut -f1,2 -d.
278 vapier 1.1 }
279 vapier 1.74 # @FUNCTION: gcc-major-version
280     # @RETURN: major compiler version (major: [3].4.6)
281 vapier 1.1 gcc-major-version() {
282 vapier 1.63 gcc-version "$@" | cut -f1 -d.
283 vapier 1.1 }
284 vapier 1.74 # @FUNCTION: gcc-minor-version
285     # @RETURN: minor compiler version (minor: 3.[4].6)
286 vapier 1.1 gcc-minor-version() {
287 vapier 1.63 gcc-version "$@" | cut -f2 -d.
288 vapier 1.1 }
289 vapier 1.74 # @FUNCTION: gcc-micro-version
290     # @RETURN: micro compiler version (micro: 3.4.[6])
291 vapier 1.1 gcc-micro-version() {
292 vapier 1.63 gcc-fullversion "$@" | cut -f3 -d. | cut -f1 -d-
293 vapier 1.1 }
294 vapier 1.74
295 kevquinn 1.68 # Returns the installation directory - internal toolchain
296     # function for use by _gcc-specs-exists (for flag-o-matic).
297     _gcc-install-dir() {
298 vapier 1.76 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
299 kevquinn 1.68 awk '$1=="install:" {print $2}')"
300     }
301     # Returns true if the indicated specs file exists - internal toolchain
302     # function for use by flag-o-matic.
303     _gcc-specs-exists() {
304     [[ -f $(_gcc-install-dir)/$1 ]]
305     }
306 kevquinn 1.41
307 kevquinn 1.68 # Returns requested gcc specs directive unprocessed - for used by
308     # gcc-specs-directive()
309 kevquinn 1.46 # Note; later specs normally overwrite earlier ones; however if a later
310     # spec starts with '+' then it appends.
311     # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
312 kevquinn 1.68 # as "Reading <file>", in order. Strictly speaking, if there's a
313     # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
314     # the same token anything from 'gcc -dumpspecs' is overridden by
315     # the contents of $(gcc_install_dir)/specs so the result is the
316     # same either way.
317     _gcc-specs-directive_raw() {
318 kevquinn 1.57 local cc=$(tc-getCC)
319     local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
320     ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
321 kevquinn 1.46 'BEGIN { pspec=""; spec=""; outside=1 }
322     $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
323 kevquinn 1.41 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
324 kevquinn 1.46 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
325     { spec=spec $0 }
326     END { print spec }'
327     return 0
328 kevquinn 1.41 }
329    
330 kevquinn 1.68 # Return the requested gcc specs directive, with all included
331     # specs expanded.
332     # Note, it does not check for inclusion loops, which cause it
333     # to never finish - but such loops are invalid for gcc and we're
334     # assuming gcc is operational.
335     gcc-specs-directive() {
336     local directive subdname subdirective
337     directive="$(_gcc-specs-directive_raw $1)"
338     while [[ ${directive} == *%\(*\)* ]]; do
339     subdname=${directive/*%\(}
340     subdname=${subdname/\)*}
341     subdirective="$(_gcc-specs-directive_raw ${subdname})"
342     directive="${directive//\%(${subdname})/${subdirective}}"
343     done
344     echo "${directive}"
345     return 0
346     }
347    
348 kevquinn 1.41 # Returns true if gcc sets relro
349     gcc-specs-relro() {
350     local directive
351     directive=$(gcc-specs-directive link_command)
352     return $([[ ${directive/\{!norelro:} != ${directive} ]])
353     }
354     # Returns true if gcc sets now
355     gcc-specs-now() {
356     local directive
357     directive=$(gcc-specs-directive link_command)
358     return $([[ ${directive/\{!nonow:} != ${directive} ]])
359     }
360     # Returns true if gcc builds PIEs
361     gcc-specs-pie() {
362     local directive
363     directive=$(gcc-specs-directive cc1)
364     return $([[ ${directive/\{!nopie:} != ${directive} ]])
365     }
366     # Returns true if gcc builds with the stack protector
367     gcc-specs-ssp() {
368     local directive
369     directive=$(gcc-specs-directive cc1)
370     return $([[ ${directive/\{!fno-stack-protector:} != ${directive} ]])
371     }
372 kevquinn 1.46 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
373     gcc-specs-ssp-to-all() {
374     local directive
375     directive=$(gcc-specs-directive cc1)
376     return $([[ ${directive/\{!fno-stack-protector-all:} != ${directive} ]])
377     }
378 gengor 1.80 # Returns true if gcc builds with fno-strict-overflow
379     gcc-specs-nostrict() {
380     local directive
381     directive=$(gcc-specs-directive cc1)
382     return $([[ ${directive/\{!fstrict-overflow:} != ${directive} ]])
383     }
384 vapier 1.60
385    
386 vapier 1.74 # @FUNCTION: gen_usr_ldscript
387     # @USAGE: <list of libs to create linker scripts for>
388     # @DESCRIPTION:
389 vapier 1.60 # This function generate linker scripts in /usr/lib for dynamic
390     # libs in /lib. This is to fix linking problems when you have
391     # the .so in /lib, and the .a in /usr/lib. What happens is that
392     # in some cases when linking dynamic, the .a in /usr/lib is used
393     # instead of the .so in /lib due to gcc/libtool tweaking ld's
394 vapier 1.74 # library search path. This causes many builds to fail.
395 vapier 1.60 # See bug #4411 for more info.
396     #
397     # Note that you should in general use the unversioned name of
398 vapier 1.74 # the library (libfoo.so), as ldconfig should usually update it
399     # correctly to point to the latest version of the library present.
400 vapier 1.70 gen_usr_ldscript() {
401 vapier 1.60 local lib libdir=$(get_libdir) output_format=""
402     # Just make sure it exists
403     dodir /usr/${libdir}
404    
405     # OUTPUT_FORMAT gives hints to the linker as to what binary format
406     # is referenced ... makes multilib saner
407     output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
408     [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
409    
410     for lib in "$@" ; do
411 vapier 1.62 if [[ ${USERLAND} == "Darwin" ]] ; then
412     ewarn "Not creating fake dynamic library for $lib on Darwin;"
413 grobian 1.61 ewarn "making a symlink instead."
414     dosym "/${libdir}/${lib}" "/usr/${libdir}/${lib}"
415     else
416     cat > "${D}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
417     /* GNU ld script
418     Since Gentoo has critical dynamic libraries
419     in /lib, and the static versions in /usr/lib,
420     we need to have a "fake" dynamic lib in /usr/lib,
421     otherwise we run into linking problems.
422    
423     See bug http://bugs.gentoo.org/4411 for more info.
424     */
425     ${output_format}
426     GROUP ( /${libdir}/${lib} )
427     END_LDSCRIPT
428     fi
429 vapier 1.60 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
430     done
431     }

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