/[gentoo-x86]/eclass/flag-o-matic.eclass
Gentoo

Diff of /eclass/flag-o-matic.eclass

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

Revision 1.107 Revision 1.132
1# Copyright 1999-2005 Gentoo Foundation 1# Copyright 1999-2009 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.107 2006/04/15 00:44:16 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.132 2009/01/21 00:42:20 gengor Exp $
4 4
5# @ECLASS: flag-o-matic.eclass
6# @MAINTAINER:
7# toolchain@gentoo.org
8# @BLURB: common functions to manipulate and query toolchain flags
9# @DESCRIPTION:
10# This eclass contains a suite of functions to help developers sanely
11# and safely manage toolchain flags in their builds.
5 12
6# need access to emktemp()
7inherit eutils toolchain-funcs multilib 13inherit eutils toolchain-funcs multilib
8 14
9#
10#### filter-flags <flags> ####
11# Remove particular flags from C[XX]FLAGS
12# Matches only complete flags
13#
14#### append-flags <flags> ####
15# Add extra flags to your current C[XX]FLAGS
16#
17#### replace-flags <orig.flag> <new.flag> ###
18# Replace a flag by another one
19#
20#### replace-cpu-flags <old.cpus> <new.cpu> ###
21# Replace march/mcpu flags that specify <old.cpus>
22# with flags that specify <new.cpu>
23#
24#### is-flag[q] <flag> ####
25# Returns "true" if flag is set in C[XX]FLAGS
26# Matches only complete a flag
27# q version sets return code but doesn't echo
28#
29#### is-ldflag[q] <flag> ####
30# Returns "true" if flag is set in LDFLAGS
31# Matches only complete a flag
32# q version sets return code but doesn't echo
33#
34#### strip-flags ####
35# Strip C[XX]FLAGS of everything except known
36# good options.
37#
38#### strip-unsupported-flags ####
39# Strip C[XX]FLAGS of any flags not supported by
40# installed version of gcc
41#
42#### get-flag <flag> ####
43# Find and echo the value for a particular flag
44#
45#### replace-sparc64-flags ####
46# Sets mcpu to v8 and uses the original value
47# as mtune if none specified.
48#
49#### filter-mfpmath <math types> ####
50# Remove specified math types from the fpmath specification
51# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
52# will leave the user with -mfpmath=386
53#
54#### append-ldflags ####
55# Add extra flags to your current LDFLAGS
56#
57#### filter-ldflags <flags> ####
58# Remove particular flags from LDFLAGS
59# Matches only complete flags
60#
61#### bindnow-flags ####
62# Returns the flags to enable "now" binding in the current selected linker.
63#
64################ DEPRECATED functions ################ 15################ DEPRECATED functions ################
65# The following are still present to avoid breaking existing 16# The following are still present to avoid breaking existing
66# code more than necessary; however they are deprecated. Please 17# code more than necessary; however they are deprecated. Please
67# use gcc-specs-* from toolchain-funcs.eclass instead, if you 18# use gcc-specs-* from toolchain-funcs.eclass instead, if you
68# need to know which hardened techs are active in the compiler. 19# need to know which hardened techs are active in the compiler.
69# See bug #100974 20# See bug #100974
70# 21#
71#### has_hardened #### 22# has_hardened
72# Returns true if the compiler has 'Hardened' in its version string, 23# has_pie
73# (note; switched-spec vanilla compilers satisfy this condition) or 24# has_pic
74# the specs file name contains 'hardened'.
75#
76#### has_pie ####
77# Returns true if the compiler by default or with current CFLAGS
78# builds position-independent code.
79#
80#### has_pic ####
81# Returns true if the compiler by default or with current CFLAGS
82# builds position-independent code.
83#
84#### has_ssp_all #### 25# has_ssp_all
85# Returns true if the compiler by default or with current CFLAGS 26# has_ssp
86# generates stack smash protections for all functions
87#
88#### has_ssp ####
89# Returns true if the compiler by default or with current CFLAGS
90# generates stack smash protections for most vulnerable functions
91#
92 27
28
93# C[XX]FLAGS that we allow in strip-flags 29# {C,CXX,F,FC}FLAGS that we allow in strip-flags
30# Note: shell globs and character lists are allowed
94setup-allowed-flags() { 31setup-allowed-flags() {
95 if [[ -z ${ALLOWED_FLAGS} ]] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
96 export ALLOWED_FLAGS="-pipe" 33 export ALLOWED_FLAGS="-pipe"
97 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
103 fi 41 fi
104 # allow a bunch of flags that negate features / control ABI 42 # allow a bunch of flags that negate features / control ABI
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow"
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
107 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \ 49 -mieee -mieee-with-inexact -mschedule \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
54 -msecure-plt -m*-toc -D* -U*"
115 55
116 # C[XX]FLAGS that we are think is ok, but needs testing 56 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
117 # NOTE: currently -Os have issues with gcc3 and K6* arch's 57 # NOTE: currently -Os have issues with gcc3 and K6* arch's
118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
119 return 0 59 return 0
120} 60}
121 61
131 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 71 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
132 gcc-specs-pie || continue 72 gcc-specs-pie || continue
133 is-flagq -nopie || append-flags -nopie;; 73 is-flagq -nopie || append-flags -nopie;;
134 -fstack-protector) 74 -fstack-protector)
135 gcc-specs-ssp || continue 75 gcc-specs-ssp || continue
136 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 76 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
137 -fstack-protector-all) 77 -fstack-protector-all)
138 gcc-specs-ssp-to-all || continue 78 gcc-specs-ssp-to-all || continue
139 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 79 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
80 -fno-strict-overflow)
81 gcc-specs-nostrict || continue
82 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
140 esac 83 esac
141 done 84 done
142} 85}
143 86
144# Remove occurrences of strings from variable given in $1 87# Remove occurrences of strings from variable given in $1
159 eval new\[\${\#new\[@]}]=\${f} 102 eval new\[\${\#new\[@]}]=\${f}
160 done 103 done
161 eval export ${VAR}=\${new\[*]} 104 eval export ${VAR}=\${new\[*]}
162} 105}
163 106
107# @FUNCTION: filter-flags
108# @USAGE: <flags>
109# @DESCRIPTION:
110# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
164filter-flags() { 111filter-flags() {
165 _filter-hardened "$@" 112 _filter-hardened "$@"
166 _filter-var CFLAGS "$@" 113 _filter-var CFLAGS "$@"
114 _filter-var CPPFLAGS "$@"
167 _filter-var CXXFLAGS "$@" 115 _filter-var CXXFLAGS "$@"
116 _filter-var FFLAGS "$@"
117 _filter-var FCFLAGS "$@"
168 return 0 118 return 0
169} 119}
170 120
121# @FUNCTION: filter-lfs-flags
122# @DESCRIPTION:
123# Remove flags that enable Large File Support.
171filter-lfs-flags() { 124filter-lfs-flags() {
172 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 125 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
173 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 126 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
174} 127}
175 128
129# @FUNCTION: append-cppflags
130# @USAGE: <flags>
131# @DESCRIPTION:
132# Add extra <flags> to the current CPPFLAGS.
133append-cppflags() {
134 [[ -z $* ]] && return 0
135 export CPPFLAGS="${CPPFLAGS} $*"
136 return 0
137}
138
139# @FUNCTION: append-cxxflags
140# @USAGE: <flags>
141# @DESCRIPTION:
142# Add extra <flags> to the current CXXFLAGS.
143append-cxxflags() {
144 [[ -z $* ]] && return 0
145 export CXXFLAGS="${CXXFLAGS} $*"
146 return 0
147}
148
149# @FUNCTION: append-fflags
150# @USAGE: <flags>
151# @DESCRIPTION:
152# Add extra <flags> to the current {F,FC}FLAGS.
153append-fflags() {
154 [[ -z $* ]] && return 0
155 export FFLAGS="${FFLAGS} $*"
156 export FCFLAGS="${FCFLAGS} $*"
157 return 0
158}
159
160# @FUNCTION: append-lfs-flags
161# @DESCRIPTION:
162# Add flags that enable Large File Support.
176append-lfs-flags() { 163append-lfs-flags() {
177 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 164 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
178 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 165 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
179} 166}
180 167
168# @FUNCTION: append-flags
169# @USAGE: <flags>
170# @DESCRIPTION:
171# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
181append-flags() { 172append-flags() {
182 [[ -z $* ]] && return 0 173 [[ -z $* ]] && return 0
183 export CFLAGS="${CFLAGS} $*" 174 export CFLAGS="${CFLAGS} $*"
184 export CXXFLAGS="${CXXFLAGS} $*" 175 export CXXFLAGS="${CXXFLAGS} $*"
176 export FFLAGS="${FFLAGS} $*"
177 export FCFLAGS="${FCFLAGS} $*"
185 return 0 178 return 0
186} 179}
187 180
181# @FUNCTION: replace-flags
182# @USAGE: <old> <new>
183# @DESCRIPTION:
184# Replace the <old> flag with <new>. Accepts shell globs for <old>.
188replace-flags() { 185replace-flags() {
189 [[ $# != 2 ]] \ 186 [[ $# != 2 ]] \
190 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 187 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
191 && die "replace-flags takes 2 arguments, not $#" 188 && die "replace-flags takes 2 arguments, not $#"
192 189
193 local f fset 190 local f fset
194 declare -a new_CFLAGS new_CXXFLAGS 191 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
195 192
196 for fset in CFLAGS CXXFLAGS; do 193 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
197 # Looping over the flags instead of using a global 194 # Looping over the flags instead of using a global
198 # substitution ensures that we're working with flag atoms. 195 # substitution ensures that we're working with flag atoms.
199 # Otherwise globs like -O* have the potential to wipe out the 196 # Otherwise globs like -O* have the potential to wipe out the
200 # list of flags. 197 # list of flags.
201 for f in ${!fset}; do 198 for f in ${!fset}; do
207 done 204 done
208 205
209 return 0 206 return 0
210} 207}
211 208
209# @FUNCTION: replace-cpu-flags
210# @USAGE: <old> <new>
211# @DESCRIPTION:
212# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
213# with flags that select the <new> cpu. Accepts shell globs for <old>.
212replace-cpu-flags() { 214replace-cpu-flags() {
213 local newcpu="$#" ; newcpu="${!newcpu}" 215 local newcpu="$#" ; newcpu="${!newcpu}"
214 while [ $# -gt 1 ] ; do 216 while [ $# -gt 1 ] ; do
215 # quote to make sure that no globbing is done (particularly on 217 # quote to make sure that no globbing is done (particularly on
216 # ${oldcpu} prior to calling replace-flags 218 # ${oldcpu}) prior to calling replace-flags
217 replace-flags "-march=${1}" "-march=${newcpu}" 219 replace-flags "-march=${1}" "-march=${newcpu}"
218 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 220 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
219 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 221 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
220 shift 222 shift
221 done 223 done
222 return 0 224 return 0
223} 225}
224 226
227_is_flagq() {
228 local x
229 for x in ${!1} ; do
230 [[ ${x} == $2 ]] && return 0
231 done
232 return 1
233}
234
235# @FUNCTION: is-flagq
236# @USAGE: <flag>
237# @DESCRIPTION:
238# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
225is-flagq() { 239is-flagq() {
226 local x 240 [[ -n $2 ]] && die "Usage: is-flag <flag>"
227 241 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
228 for x in ${CFLAGS} ${CXXFLAGS} ; do
229 # Note this should work with globs like -mcpu=ultrasparc*
230 if [[ ${x} == ${1} ]]; then
231 return 0
232 fi
233 done
234 return 1
235} 242}
236 243
244# @FUNCTION: is-flag
245# @USAGE: <flag>
246# @DESCRIPTION:
247# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
237is-flag() { 248is-flag() {
238 if is-flagq ${1}; then 249 is-flagq "$@" && echo true
239 echo true
240 return 0
241 fi
242 return 1
243} 250}
244 251
252# @FUNCTION: is-ldflagq
253# @USAGE: <flag>
254# @DESCRIPTION:
255# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
245is-ldflagq() { 256is-ldflagq() {
246 local x 257 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
247 258 _is_flagq LDFLAGS $1
248 for x in ${LDFLAGS} ; do
249 # Note this should work with globs like -mcpu=ultrasparc*
250 if [[ ${x} == ${1} ]]; then
251 return 0
252 fi
253 done
254 return 1
255} 259}
256 260
261# @FUNCTION: is-ldflag
262# @USAGE: <flag>
263# @DESCRIPTION:
264# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
257is-ldflag() { 265is-ldflag() {
258 if is-ldflagq ${1}; then 266 is-ldflagq "$@" && echo true
259 echo true
260 return 0
261 fi
262 return 1
263} 267}
264 268
269# @FUNCTION: filter-mfpmath
270# @USAGE: <math types>
271# @DESCRIPTION:
272# Remove specified math types from the fpmath flag. For example, if the user
273# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
274# -mfpmath=386.
265filter-mfpmath() { 275filter-mfpmath() {
266 local orig_mfpmath new_math prune_math 276 local orig_mfpmath new_math prune_math
267 277
268 # save the original -mfpmath flag 278 # save the original -mfpmath flag
269 orig_mfpmath="`get-flag -mfpmath`" 279 orig_mfpmath=$(get-flag -mfpmath)
270 # get the value of the current -mfpmath flag 280 # get the value of the current -mfpmath flag
271 new_math=" `get-flag mfpmath | tr , ' '` " 281 new_math=$(get-flag mfpmath)
282 new_math=" ${new_math//,/ } "
272 # figure out which math values are to be removed 283 # figure out which math values are to be removed
273 prune_math="" 284 prune_math=""
274 for prune_math in "$@" ; do 285 for prune_math in "$@" ; do
275 new_math="${new_math/ ${prune_math} / }" 286 new_math=${new_math/ ${prune_math} / }
276 done 287 done
277 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 288 new_math=$(echo ${new_math})
289 new_math=${new_math// /,}
278 290
279 if [ -z "${new_math}" ] ; then 291 if [[ -z ${new_math} ]] ; then
280 # if we're removing all user specified math values are 292 # if we're removing all user specified math values are
281 # slated for removal, then we just filter the flag 293 # slated for removal, then we just filter the flag
282 filter-flags ${orig_mfpmath} 294 filter-flags ${orig_mfpmath}
283 else 295 else
284 # if we only want to filter some of the user specified 296 # if we only want to filter some of the user specified
286 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 298 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
287 fi 299 fi
288 return 0 300 return 0
289} 301}
290 302
303# @FUNCTION: strip-flags
304# @DESCRIPTION:
305# Strip C[XX]FLAGS of everything except known good/safe flags.
291strip-flags() { 306strip-flags() {
292 local x y flag NEW_CFLAGS NEW_CXXFLAGS 307 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
293 308
294 setup-allowed-flags 309 setup-allowed-flags
295 310
296 local NEW_CFLAGS="" 311 local NEW_CFLAGS=""
297 local NEW_CXXFLAGS="" 312 local NEW_CXXFLAGS=""
313 local NEW_FFLAGS=""
314 local NEW_FCFLAGS=""
298 315
299 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 316 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
300 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 317 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
301 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 318 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
302 fi 319 fi
321 break 338 break
322 fi 339 fi
323 done 340 done
324 done 341 done
325 342
343 for x in ${FFLAGS}; do
344 for y in ${ALLOWED_FLAGS}; do
345 flag=${x%%=*}
346 if [ "${flag%%${y}}" = "" ] ; then
347 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
348 break
349 fi
350 done
351 done
352
353 for x in ${FCFLAGS}; do
354 for y in ${ALLOWED_FLAGS}; do
355 flag=${x%%=*}
356 if [ "${flag%%${y}}" = "" ] ; then
357 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
358 break
359 fi
360 done
361 done
362
326 # In case we filtered out all optimization flags fallback to -O2 363 # In case we filtered out all optimization flags fallback to -O2
327 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 364 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
328 NEW_CFLAGS="${NEW_CFLAGS} -O2" 365 NEW_CFLAGS="${NEW_CFLAGS} -O2"
329 fi 366 fi
330 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 367 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
331 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 368 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
332 fi 369 fi
370 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
371 NEW_FFLAGS="${NEW_FFLAGS} -O2"
372 fi
373 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
374 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
375 fi
333 376
334 set +f # re-enable pathname expansion 377 set +f # re-enable pathname expansion
335 378
336 export CFLAGS="${NEW_CFLAGS}" 379 export CFLAGS="${NEW_CFLAGS}"
337 export CXXFLAGS="${NEW_CXXFLAGS}" 380 export CXXFLAGS="${NEW_CXXFLAGS}"
381 export FFLAGS="${NEW_FFLAGS}"
382 export FCFLAGS="${NEW_FCFLAGS}"
338 return 0 383 return 0
339} 384}
340 385
341test-flag-PROG() { 386test-flag-PROG() {
342 local comp=$1 387 local comp=$1
348 local PROG=$(tc-get${comp}) 393 local PROG=$(tc-get${comp})
349 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 394 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
350 > /dev/null 2>&1 395 > /dev/null 2>&1
351} 396}
352 397
353# Returns true if C compiler support given flag 398# @FUNCTION: test-flag-CC
399# @USAGE: <flag>
400# @DESCRIPTION:
401# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
354test-flag-CC() { test-flag-PROG "CC" "$1"; } 402test-flag-CC() { test-flag-PROG "CC" "$1"; }
355 403
356# Returns true if C++ compiler support given flag 404# @FUNCTION: test-flag-CXX
405# @USAGE: <flag>
406# @DESCRIPTION:
407# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
357test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 408test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
409
410# @FUNCTION: test-flag-F77
411# @USAGE: <flag>
412# @DESCRIPTION:
413# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
414test-flag-F77() { test-flag-PROG "F77" "$1"; }
415
416# @FUNCTION: test-flag-FC
417# @USAGE: <flag>
418# @DESCRIPTION:
419# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
420test-flag-FC() { test-flag-PROG "FC" "$1"; }
358 421
359test-flags-PROG() { 422test-flags-PROG() {
360 local comp=$1 423 local comp=$1
361 local flags 424 local flags
362 local x 425 local x
363 426
364 shift 427 shift
365 428
366 [[ -z ${comp} ]] && \ 429 [[ -z ${comp} ]] && return 1
367 return 1
368 430
431 x=""
369 for x in "$@" ; do 432 for x in "$@" ; do
370 test-flag-${comp} "${x}" && flags="${flags} ${x}" 433 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
371 done 434 done
372 435
373 echo "${flags}" 436 echo "${flags}"
374 437
375 # Just bail if we dont have any flags 438 # Just bail if we dont have any flags
376 [[ -n ${flags} ]] 439 [[ -n ${flags} ]]
377} 440}
378 441
379# Returns (echo's) the given flags supported by the C compiler 442# @FUNCTION: test-flags-CC
443# @USAGE: <flags>
444# @DESCRIPTION:
445# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
380test-flags-CC() { test-flags-PROG "CC" "$@"; } 446test-flags-CC() { test-flags-PROG "CC" "$@"; }
381 447
382# Returns (echo's) the given flags supported by the C++ compiler 448# @FUNCTION: test-flags-CXX
449# @USAGE: <flags>
450# @DESCRIPTION:
451# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
383test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 452test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
384 453
454# @FUNCTION: test-flags-F77
455# @USAGE: <flags>
456# @DESCRIPTION:
457# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
458test-flags-F77() { test-flags-PROG "F77" "$@"; }
459
460# @FUNCTION: test-flags-FC
461# @USAGE: <flags>
462# @DESCRIPTION:
463# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
464test-flags-FC() { test-flags-PROG "FC" "$@"; }
465
466# @FUNCTION: test-flags
467# @USAGE: <flags>
468# @DESCRIPTION:
385# Short-hand that should hopefully work for both C and C++ compiler, but 469# Short-hand that should hopefully work for both C and C++ compiler, but
386# its really only present due to the append-flags() abomination. 470# its really only present due to the append-flags() abomination.
387test-flags() { test-flags-CC "$@"; } 471test-flags() { test-flags-CC "$@"; }
388 472
389# Depriciated, use test-flags() 473# @FUNCTION: test_flag
474# @DESCRIPTION:
475# DEPRICIATED, use test-flags()
390test_flag() { 476test_flag() {
391 ewarn "test_flag: deprecated, please use test-flags()!" >&2 477 ewarn "test_flag: deprecated, please use test-flags()!" >&2
392 478
393 test-flags-CC "$@" 479 test-flags-CC "$@"
394} 480}
395 481
482# @FUNCTION: test_version_info
483# @USAGE: <version>
484# @DESCRIPTION:
485# Returns shell true if the current C compiler version matches <version>, else returns shell false.
486# Accepts shell globs.
396test_version_info() { 487test_version_info() {
397 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 488 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
398 return 0 489 return 0
399 else 490 else
400 return 1 491 return 1
401 fi 492 fi
402} 493}
403 494
495# @FUNCTION: strip-unsupported-flags
496# @DESCRIPTION:
497# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
404strip-unsupported-flags() { 498strip-unsupported-flags() {
405 local x NEW_CFLAGS NEW_CXXFLAGS 499 export CFLAGS=$(test-flags-CC ${CFLAGS})
406 500 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
407 for x in ${CFLAGS} ; do 501 export FFLAGS=$(test-flags-F77 ${FFLAGS})
408 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})" 502 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
409 done
410 for x in ${CXXFLAGS} ; do
411 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
412 done
413
414 export CFLAGS=${NEW_CFLAGS}
415 export CXXFLAGS=${NEW_CXXFLAGS}
416} 503}
417 504
505# @FUNCTION: get-flag
506# @USAGE: <flag>
507# @DESCRIPTION:
508# Find and echo the value for a particular flag. Accepts shell globs.
418get-flag() { 509get-flag() {
419 local f findflag="$1" 510 local f findflag="$1"
420 511
421 # this code looks a little flaky but seems to work for 512 # this code looks a little flaky but seems to work for
422 # everything we want ... 513 # everything we want ...
423 # for example, if CFLAGS="-march=i686": 514 # for example, if CFLAGS="-march=i686":
424 # `get-flag -march` == "-march=i686" 515 # `get-flag -march` == "-march=i686"
425 # `get-flag march` == "i686" 516 # `get-flag march` == "i686"
426 for f in ${CFLAGS} ${CXXFLAGS} ; do 517 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
427 if [ "${f/${findflag}}" != "${f}" ] ; then 518 if [ "${f/${findflag}}" != "${f}" ] ; then
428 printf "%s\n" "${f/-${findflag}=}" 519 printf "%s\n" "${f/-${findflag}=}"
429 return 0 520 return 0
430 fi 521 fi
431 done 522 done
432 return 1 523 return 1
433} 524}
434 525
526# @FUNCTION: has_hardened
527# @DESCRIPTION:
435# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 528# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
436has_hardened() { 529has_hardened() {
437 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 530 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
438 531
439 test_version_info Hardened && return 0 532 test_version_info Hardened && return 0
440 # The specs file wont exist unless gcc has GCC_SPECS support 533 # The specs file wont exist unless gcc has GCC_SPECS support
441 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 534 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
442} 535}
443 536
537# @FUNCTION: has_pic
538# @DESCRIPTION:
444# DEPRECATED - use gcc-specs-pie from toolchain-funcs 539# DEPRECATED - use gcc-specs-pie from toolchain-funcs
445# indicate whether PIC is set 540# indicate whether PIC is set
446has_pic() { 541has_pic() {
447 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 542 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
448 543
449 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 544 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
450 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \ 545 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
451 gcc-specs-pie 546 gcc-specs-pie
452} 547}
453 548
549# @FUNCTION: has_pie
550# @DESCRIPTION:
454# DEPRECATED - use gcc-specs-pie from toolchain-funcs 551# DEPRECATED - use gcc-specs-pie from toolchain-funcs
455# indicate whether PIE is set 552# indicate whether PIE is set
456has_pie() { 553has_pie() {
457 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 554 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
458 555
459 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 556 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
460 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \ 557 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
461 gcc-specs-pie 558 gcc-specs-pie
462} 559}
463 560
561# @FUNCTION: has_ssp_all
562# @DESCRIPTION:
464# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 563# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
465# indicate whether code for SSP is being generated for all functions 564# indicate whether code for SSP is being generated for all functions
466has_ssp_all() { 565has_ssp_all() {
467 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 566 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
468 567
469 # note; this matches only -fstack-protector-all 568 # note; this matches only -fstack-protector-all
470 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 569 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
471 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 570 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
472 gcc-specs-ssp-all 571 gcc-specs-ssp-to-all
473} 572}
474 573
574# @FUNCTION: has_ssp
575# @DESCRIPTION:
475# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 576# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
476# indicate whether code for SSP is being generated 577# indicate whether code for SSP is being generated
477has_ssp() { 578has_ssp() {
478 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 579 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
479 580
481 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 582 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
482 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 583 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
483 gcc-specs-ssp 584 gcc-specs-ssp
484} 585}
485 586
587# @FUNCTION: has_m64
588# @DESCRIPTION:
589# This doesn't test if the flag is accepted, it tests if the flag actually
590# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
591# return code is 0, else the return code is 1.
486has_m64() { 592has_m64() {
487 # this doesnt test if the flag is accepted, it tests if the flag 593 # this doesnt test if the flag is accepted, it tests if the flag
488 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 594 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
489 # please dont replace this function with test_flag in some future 595 # please dont replace this function with test_flag in some future
490 # clean-up! 596 # clean-up!
497 rm -f "${temp}".c 603 rm -f "${temp}".c
498 [[ ${ret} != 1 ]] && return 0 604 [[ ${ret} != 1 ]] && return 0
499 return 1 605 return 1
500} 606}
501 607
608# @FUNCTION: has_m32
609# @DESCRIPTION:
610# This doesn't test if the flag is accepted, it tests if the flag actually
611# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
612# code is 0, else return code is 1.
502has_m32() { 613has_m32() {
503 # this doesnt test if the flag is accepted, it tests if the flag 614 # this doesnt test if the flag is accepted, it tests if the flag
504 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 615 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
505 # please dont replace this function with test_flag in some future 616 # please dont replace this function with test_flag in some future
506 # clean-up! 617 # clean-up!
515 rm -f "${temp}".c 626 rm -f "${temp}".c
516 [[ ${ret} != 1 ]] && return 0 627 [[ ${ret} != 1 ]] && return 0
517 return 1 628 return 1
518} 629}
519 630
631# @FUNCTION: replace-sparc64-flags
632# @DESCRIPTION:
633# Sets mcpu to v8 and uses the original value as mtune if none specified.
520replace-sparc64-flags() { 634replace-sparc64-flags() {
521 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 635 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
522 636
523 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 637 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
524 for x in ${SPARC64_CPUS}; do 638 for x in ${SPARC64_CPUS}; do
525 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 639 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
526 done 640 done
527 else 641 else
528 for x in ${SPARC64_CPUS}; do 642 for x in ${SPARC64_CPUS}; do
529 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 643 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
530 done 644 done
531 fi 645 fi
532 646
533 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 647 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
534 for x in ${SPARC64_CPUS}; do 648 for x in ${SPARC64_CPUS}; do
535 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 649 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
536 done 650 done
537 else 651 else
538 for x in ${SPARC64_CPUS}; do 652 for x in ${SPARC64_CPUS}; do
539 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 653 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
540 done 654 done
541 fi 655 fi
542 656
543 export CFLAGS CXXFLAGS 657 export CFLAGS CXXFLAGS
544} 658}
545 659
660# @FUNCTION: append-ldflags
661# @USAGE: <flags>
662# @DESCRIPTION:
663# Add extra <flags> to the current LDFLAGS.
546append-ldflags() { 664append-ldflags() {
547 [[ -z $* ]] && return 0 665 [[ -z $* ]] && return 0
666 local flag
667 for flag in "$@"; do
668 [[ ${flag} == -l* ]] && \
669 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
670 done
671
548 export LDFLAGS="${LDFLAGS} $*" 672 export LDFLAGS="${LDFLAGS} $*"
549 return 0 673 return 0
550} 674}
551 675
552# Remove flags from LDFLAGS - it's up to the ebuild to filter 676# @FUNCTION: filter-ldflags
553# CFLAGS and CXXFLAGS via filter-flags if they need to. 677# @USAGE: <flags>
678# @DESCRIPTION:
679# Remove particular <flags> from LDFLAGS. Accepts shell globs.
554filter-ldflags() { 680filter-ldflags() {
555 _filter-var LDFLAGS "$@" 681 _filter-var LDFLAGS "$@"
556 return 0 682 return 0
557} 683}
558 684
685# @FUNCTION: raw-ldflags
686# @USAGE: <flags>
687# @DESCRIPTION:
559# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 688# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
560# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 689# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
561# to gcc where it needs the '-Wl,'. 690# to gcc where it needs the '-Wl,'.
562raw-ldflags() { 691raw-ldflags() {
563 local x input="$@" 692 local x input="$@"
568 set -- "$@" ${x//,/ } 697 set -- "$@" ${x//,/ }
569 done 698 done
570 echo "$@" 699 echo "$@"
571} 700}
572 701
573# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 702# @FUNCTION: bindnow-flags
574# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 703# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
575# fixes. 704# @DESCRIPTION:
705# DEPRECATED - Gets the flags needed for "NOW" binding
706bindnow-flags() {
707 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild"
708}
709
710
711# Some tests for when we screw with things and want to make
712# sure we didn't break anything
713#TESTS() {
714# CFLAGS="-a -b -c=1"
715# CXXFLAGS="-x -y -z=2"
716# LDFLAGS="-l -m -n=3"
576# 717#
577# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 718# die() { exit 1; }
578gcc2-flags() { 719# (is-flag 1 2 3) && die
579 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then 720# (is-ldflag 1 2 3) && die
580 CFLAGS=${CFLAGS//-mtune=/-mcpu=} 721#
581 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=} 722# is-flagq -l && die
582 fi 723# is-ldflagq -a && die
583 724# is-flagq -a || die
584 replace-cpu-flags k6-{2,3} k6 725# is-flagq -x || die
585 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686 726# is-ldflagq -n=* || die
586 727# is-ldflagq -n && die
587 replace-cpu-flags pentium-mmx i586 728#
588 replace-cpu-flags pentium{2,3,4} i686 729# strip-unsupported-flags
589 730# [[ ${CFLAGS} == "-c=1" ]] || die
590 replace-cpu-flags ev6{7,8} ev6 731# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
591 732#
592 export CFLAGS CXXFLAGS 733# echo "All tests pass"
593} 734#}
594 735#TESTS
595# Gets the flags needed for "NOW" binding
596bindnow-flags() {
597 case $($(tc-getLD) -v 2>&1 </dev/null) in
598 *GNU* | *'with BFD'*) # GNU ld
599 echo "-Wl,-z,now" ;;
600 *Apple*) # Darwin ld
601 echo "-bind_at_load" ;;
602 *)
603 # Some linkers just recognize -V instead of -v
604 case $($(tc-getLD) -V 2>&1 </dev/null) in
605 *Solaris*) # Solaris accept almost the same GNU options
606 echo "-Wl,-z,now" ;;
607 esac
608 ;;
609 esac
610}

Legend:
Removed from v.1.107  
changed lines
  Added in v.1.132

  ViewVC Help
Powered by ViewVC 1.1.20