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1# Copyright 1999-2005 Gentoo Foundation 1# Copyright 1999-2008 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 1.106 2006/02/19 23:18:30 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.128 2009/01/02 22:14:18 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="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
102 fi 41 fi
103 # allow a bunch of flags that negate features / control ABI 42 # allow a bunch of flags that negate features / control ABI
104 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow"
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
106 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
107 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
108 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
109 -mieee -mieee-with-inexact \ 49 -mieee -mieee-with-inexact -mschedule \
110 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
111 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
112 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
113 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
54 -msecure-plt -m*-toc -D* -U*"
114 55
115 # 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
116 # NOTE: currently -Os have issues with gcc3 and K6* arch's 57 # NOTE: currently -Os have issues with gcc3 and K6* arch's
117 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
118 return 0 59 return 0
119} 60}
120 61
134 gcc-specs-ssp || continue 75 gcc-specs-ssp || continue
135 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 76 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
136 -fstack-protector-all) 77 -fstack-protector-all)
137 gcc-specs-ssp-to-all || continue 78 gcc-specs-ssp-to-all || continue
138 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 79 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
80 -fno-strict-overflow)
81 gcc-specs-nostrict || continue
82 is-flagq -fstrict-overflow || append-flags -fstrict-overflow;;
139 esac 83 esac
140 done 84 done
141} 85}
142 86
143# Remove occurrences of strings from variable given in $1 87# Remove occurrences of strings from variable given in $1
158 eval new\[\${\#new\[@]}]=\${f} 102 eval new\[\${\#new\[@]}]=\${f}
159 done 103 done
160 eval export ${VAR}=\${new\[*]} 104 eval export ${VAR}=\${new\[*]}
161} 105}
162 106
107# @FUNCTION: filter-flags
108# @USAGE: <flags>
109# @DESCRIPTION:
110# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
163filter-flags() { 111filter-flags() {
164 _filter-hardened "$@" 112 _filter-hardened "$@"
165 _filter-var CFLAGS "$@" 113 _filter-var CFLAGS "$@"
114 _filter-var CPPFLAGS "$@"
166 _filter-var CXXFLAGS "$@" 115 _filter-var CXXFLAGS "$@"
116 _filter-var FFLAGS "$@"
117 _filter-var FCFLAGS "$@"
167 return 0 118 return 0
168} 119}
169 120
121# @FUNCTION: filter-lfs-flags
122# @DESCRIPTION:
123# Remove flags that enable Large File Support.
170filter-lfs-flags() { 124filter-lfs-flags() {
171 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 125 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
172 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
173} 127}
174 128
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-fflags
140# @USAGE: <flags>
141# @DESCRIPTION:
142# Add extra <flags> to the current {F,FC}FLAGS.
143append-fflags() {
144 [[ -z $* ]] && return 0
145 export FFLAGS="${FFLAGS} $*"
146 export FCFLAGS="${FCFLAGS} $*"
147 return 0
148}
149
150# @FUNCTION: append-lfs-flags
151# @DESCRIPTION:
152# Add flags that enable Large File Support.
175append-lfs-flags() { 153append-lfs-flags() {
176 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 154 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
177 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 155 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
178} 156}
179 157
158# @FUNCTION: append-flags
159# @USAGE: <flags>
160# @DESCRIPTION:
161# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
180append-flags() { 162append-flags() {
181 [[ -z $* ]] && return 0 163 [[ -z $* ]] && return 0
182 export CFLAGS="${CFLAGS} $*" 164 export CFLAGS="${CFLAGS} $*"
183 export CXXFLAGS="${CXXFLAGS} $*" 165 export CXXFLAGS="${CXXFLAGS} $*"
166 export FFLAGS="${FFLAGS} $*"
167 export FCFLAGS="${FCFLAGS} $*"
184 return 0 168 return 0
185} 169}
186 170
171# @FUNCTION: replace-flags
172# @USAGE: <old> <new>
173# @DESCRIPTION:
174# Replace the <old> flag with <new>. Accepts shell globs for <old>.
187replace-flags() { 175replace-flags() {
188 [[ $# != 2 ]] \ 176 [[ $# != 2 ]] \
189 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 177 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
190 && die "replace-flags takes 2 arguments, not $#" 178 && die "replace-flags takes 2 arguments, not $#"
191 179
192 local f fset 180 local f fset
193 declare -a new_CFLAGS new_CXXFLAGS 181 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
194 182
195 for fset in CFLAGS CXXFLAGS; do 183 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
196 # Looping over the flags instead of using a global 184 # Looping over the flags instead of using a global
197 # substitution ensures that we're working with flag atoms. 185 # substitution ensures that we're working with flag atoms.
198 # Otherwise globs like -O* have the potential to wipe out the 186 # Otherwise globs like -O* have the potential to wipe out the
199 # list of flags. 187 # list of flags.
200 for f in ${!fset}; do 188 for f in ${!fset}; do
206 done 194 done
207 195
208 return 0 196 return 0
209} 197}
210 198
199# @FUNCTION: replace-cpu-flags
200# @USAGE: <old> <new>
201# @DESCRIPTION:
202# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
203# with flags that select the <new> cpu. Accepts shell globs for <old>.
211replace-cpu-flags() { 204replace-cpu-flags() {
212 local newcpu="$#" ; newcpu="${!newcpu}" 205 local newcpu="$#" ; newcpu="${!newcpu}"
213 while [ $# -gt 1 ] ; do 206 while [ $# -gt 1 ] ; do
214 # quote to make sure that no globbing is done (particularly on 207 # quote to make sure that no globbing is done (particularly on
215 # ${oldcpu} prior to calling replace-flags 208 # ${oldcpu}) prior to calling replace-flags
216 replace-flags "-march=${1}" "-march=${newcpu}" 209 replace-flags "-march=${1}" "-march=${newcpu}"
217 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 210 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
218 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 211 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
219 shift 212 shift
220 done 213 done
221 return 0 214 return 0
222} 215}
223 216
217_is_flagq() {
218 local x
219 for x in ${!1} ; do
220 [[ ${x} == $2 ]] && return 0
221 done
222 return 1
223}
224
225# @FUNCTION: is-flagq
226# @USAGE: <flag>
227# @DESCRIPTION:
228# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
224is-flagq() { 229is-flagq() {
225 local x 230 [[ -n $2 ]] && die "Usage: is-flag <flag>"
226 231 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
227 for x in ${CFLAGS} ${CXXFLAGS} ; do
228 # Note this should work with globs like -mcpu=ultrasparc*
229 if [[ ${x} == ${1} ]]; then
230 return 0
231 fi
232 done
233 return 1
234} 232}
235 233
234# @FUNCTION: is-flag
235# @USAGE: <flag>
236# @DESCRIPTION:
237# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
236is-flag() { 238is-flag() {
237 if is-flagq ${1}; then 239 is-flagq "$@" && echo true
238 echo true
239 return 0
240 fi
241 return 1
242} 240}
243 241
242# @FUNCTION: is-ldflagq
243# @USAGE: <flag>
244# @DESCRIPTION:
245# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
244is-ldflagq() { 246is-ldflagq() {
245 local x 247 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
246 248 _is_flagq LDFLAGS $1
247 for x in ${LDFLAGS} ; do
248 # Note this should work with globs like -mcpu=ultrasparc*
249 if [[ ${x} == ${1} ]]; then
250 return 0
251 fi
252 done
253 return 1
254} 249}
255 250
251# @FUNCTION: is-ldflag
252# @USAGE: <flag>
253# @DESCRIPTION:
254# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
256is-ldflag() { 255is-ldflag() {
257 if is-ldflagq ${1}; then 256 is-ldflagq "$@" && echo true
258 echo true
259 return 0
260 fi
261 return 1
262} 257}
263 258
259# @FUNCTION: filter-mfpmath
260# @USAGE: <math types>
261# @DESCRIPTION:
262# Remove specified math types from the fpmath flag. For example, if the user
263# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
264# -mfpmath=386.
264filter-mfpmath() { 265filter-mfpmath() {
265 local orig_mfpmath new_math prune_math 266 local orig_mfpmath new_math prune_math
266 267
267 # save the original -mfpmath flag 268 # save the original -mfpmath flag
268 orig_mfpmath="`get-flag -mfpmath`" 269 orig_mfpmath=$(get-flag -mfpmath)
269 # get the value of the current -mfpmath flag 270 # get the value of the current -mfpmath flag
270 new_math=" `get-flag mfpmath | tr , ' '` " 271 new_math=$(get-flag mfpmath)
272 new_math=" ${new_math//,/ } "
271 # figure out which math values are to be removed 273 # figure out which math values are to be removed
272 prune_math="" 274 prune_math=""
273 for prune_math in "$@" ; do 275 for prune_math in "$@" ; do
274 new_math="${new_math/ ${prune_math} / }" 276 new_math=${new_math/ ${prune_math} / }
275 done 277 done
276 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 278 new_math=$(echo ${new_math})
279 new_math=${new_math// /,}
277 280
278 if [ -z "${new_math}" ] ; then 281 if [[ -z ${new_math} ]] ; then
279 # if we're removing all user specified math values are 282 # if we're removing all user specified math values are
280 # slated for removal, then we just filter the flag 283 # slated for removal, then we just filter the flag
281 filter-flags ${orig_mfpmath} 284 filter-flags ${orig_mfpmath}
282 else 285 else
283 # if we only want to filter some of the user specified 286 # if we only want to filter some of the user specified
285 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 288 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
286 fi 289 fi
287 return 0 290 return 0
288} 291}
289 292
293# @FUNCTION: strip-flags
294# @DESCRIPTION:
295# Strip C[XX]FLAGS of everything except known good/safe flags.
290strip-flags() { 296strip-flags() {
291 local x y flag NEW_CFLAGS NEW_CXXFLAGS 297 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
292 298
293 setup-allowed-flags 299 setup-allowed-flags
294 300
295 local NEW_CFLAGS="" 301 local NEW_CFLAGS=""
296 local NEW_CXXFLAGS="" 302 local NEW_CXXFLAGS=""
303 local NEW_FFLAGS=""
304 local NEW_FCFLAGS=""
297 305
298 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 306 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
299 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 307 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
300 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 308 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
301 fi 309 fi
320 break 328 break
321 fi 329 fi
322 done 330 done
323 done 331 done
324 332
333 for x in ${FFLAGS}; do
334 for y in ${ALLOWED_FLAGS}; do
335 flag=${x%%=*}
336 if [ "${flag%%${y}}" = "" ] ; then
337 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
338 break
339 fi
340 done
341 done
342
343 for x in ${FCFLAGS}; do
344 for y in ${ALLOWED_FLAGS}; do
345 flag=${x%%=*}
346 if [ "${flag%%${y}}" = "" ] ; then
347 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
348 break
349 fi
350 done
351 done
352
325 # In case we filtered out all optimization flags fallback to -O2 353 # In case we filtered out all optimization flags fallback to -O2
326 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 354 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
327 NEW_CFLAGS="${NEW_CFLAGS} -O2" 355 NEW_CFLAGS="${NEW_CFLAGS} -O2"
328 fi 356 fi
329 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 357 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
330 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 358 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
331 fi 359 fi
360 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
361 NEW_FFLAGS="${NEW_FFLAGS} -O2"
362 fi
363 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
364 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
365 fi
332 366
333 set +f # re-enable pathname expansion 367 set +f # re-enable pathname expansion
334 368
335 export CFLAGS="${NEW_CFLAGS}" 369 export CFLAGS="${NEW_CFLAGS}"
336 export CXXFLAGS="${NEW_CXXFLAGS}" 370 export CXXFLAGS="${NEW_CXXFLAGS}"
371 export FFLAGS="${NEW_FFLAGS}"
372 export FCFLAGS="${NEW_FCFLAGS}"
337 return 0 373 return 0
338} 374}
339 375
340test-flag-PROG() { 376test-flag-PROG() {
341 local comp=$1 377 local comp=$1
347 local PROG=$(tc-get${comp}) 383 local PROG=$(tc-get${comp})
348 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 384 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
349 > /dev/null 2>&1 385 > /dev/null 2>&1
350} 386}
351 387
352# Returns true if C compiler support given flag 388# @FUNCTION: test-flag-CC
389# @USAGE: <flag>
390# @DESCRIPTION:
391# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
353test-flag-CC() { test-flag-PROG "CC" "$1"; } 392test-flag-CC() { test-flag-PROG "CC" "$1"; }
354 393
355# Returns true if C++ compiler support given flag 394# @FUNCTION: test-flag-CXX
395# @USAGE: <flag>
396# @DESCRIPTION:
397# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
356test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 398test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
399
400# @FUNCTION: test-flag-F77
401# @USAGE: <flag>
402# @DESCRIPTION:
403# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
404test-flag-F77() { test-flag-PROG "F77" "$1"; }
405
406# @FUNCTION: test-flag-FC
407# @USAGE: <flag>
408# @DESCRIPTION:
409# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
410test-flag-FC() { test-flag-PROG "FC" "$1"; }
357 411
358test-flags-PROG() { 412test-flags-PROG() {
359 local comp=$1 413 local comp=$1
360 local flags 414 local flags
361 local x 415 local x
362 416
363 shift 417 shift
364 418
365 [[ -z ${comp} ]] && \ 419 [[ -z ${comp} ]] && return 1
366 return 1
367 420
421 x=""
368 for x in "$@" ; do 422 for x in "$@" ; do
369 test-flag-${comp} "${x}" && flags="${flags} ${x}" 423 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
370 done 424 done
371 425
372 echo "${flags}" 426 echo "${flags}"
373 427
374 # Just bail if we dont have any flags 428 # Just bail if we dont have any flags
375 [[ -n ${flags} ]] 429 [[ -n ${flags} ]]
376} 430}
377 431
378# Returns (echo's) the given flags supported by the C compiler 432# @FUNCTION: test-flags-CC
433# @USAGE: <flags>
434# @DESCRIPTION:
435# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
379test-flags-CC() { test-flags-PROG "CC" "$@"; } 436test-flags-CC() { test-flags-PROG "CC" "$@"; }
380 437
381# Returns (echo's) the given flags supported by the C++ compiler 438# @FUNCTION: test-flags-CXX
439# @USAGE: <flags>
440# @DESCRIPTION:
441# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
382test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 442test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
383 443
444# @FUNCTION: test-flags-F77
445# @USAGE: <flags>
446# @DESCRIPTION:
447# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
448test-flags-F77() { test-flags-PROG "F77" "$@"; }
449
450# @FUNCTION: test-flags-FC
451# @USAGE: <flags>
452# @DESCRIPTION:
453# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
454test-flags-FC() { test-flags-PROG "FC" "$@"; }
455
456# @FUNCTION: test-flags
457# @USAGE: <flags>
458# @DESCRIPTION:
384# Short-hand that should hopefully work for both C and C++ compiler, but 459# Short-hand that should hopefully work for both C and C++ compiler, but
385# its really only present due to the append-flags() abomination. 460# its really only present due to the append-flags() abomination.
386test-flags() { test-flags-CC "$@"; } 461test-flags() { test-flags-CC "$@"; }
387 462
388# Depriciated, use test-flags() 463# @FUNCTION: test_flag
464# @DESCRIPTION:
465# DEPRICIATED, use test-flags()
389test_flag() { 466test_flag() {
390 ewarn "test_flag: deprecated, please use test-flags()!" >&2 467 ewarn "test_flag: deprecated, please use test-flags()!" >&2
391 468
392 test-flags-CC "$@" 469 test-flags-CC "$@"
393} 470}
394 471
472# @FUNCTION: test_version_info
473# @USAGE: <version>
474# @DESCRIPTION:
475# Returns shell true if the current C compiler version matches <version>, else returns shell false.
476# Accepts shell globs.
395test_version_info() { 477test_version_info() {
396 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 478 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
397 return 0 479 return 0
398 else 480 else
399 return 1 481 return 1
400 fi 482 fi
401} 483}
402 484
485# @FUNCTION: strip-unsupported-flags
486# @DESCRIPTION:
487# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
403strip-unsupported-flags() { 488strip-unsupported-flags() {
404 local x NEW_CFLAGS NEW_CXXFLAGS 489 export CFLAGS=$(test-flags-CC ${CFLAGS})
405 490 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
406 for x in ${CFLAGS} ; do 491 export FFLAGS=$(test-flags-F77 ${FFLAGS})
407 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})" 492 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
408 done
409 for x in ${CXXFLAGS} ; do
410 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
411 done
412
413 export CFLAGS=${NEW_CFLAGS}
414 export CXXFLAGS=${NEW_CXXFLAGS}
415} 493}
416 494
495# @FUNCTION: get-flag
496# @USAGE: <flag>
497# @DESCRIPTION:
498# Find and echo the value for a particular flag. Accepts shell globs.
417get-flag() { 499get-flag() {
418 local f findflag="$1" 500 local f findflag="$1"
419 501
420 # this code looks a little flaky but seems to work for 502 # this code looks a little flaky but seems to work for
421 # everything we want ... 503 # everything we want ...
422 # for example, if CFLAGS="-march=i686": 504 # for example, if CFLAGS="-march=i686":
423 # `get-flag -march` == "-march=i686" 505 # `get-flag -march` == "-march=i686"
424 # `get-flag march` == "i686" 506 # `get-flag march` == "i686"
425 for f in ${CFLAGS} ${CXXFLAGS} ; do 507 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
426 if [ "${f/${findflag}}" != "${f}" ] ; then 508 if [ "${f/${findflag}}" != "${f}" ] ; then
427 printf "%s\n" "${f/-${findflag}=}" 509 printf "%s\n" "${f/-${findflag}=}"
428 return 0 510 return 0
429 fi 511 fi
430 done 512 done
431 return 1 513 return 1
432} 514}
433 515
516# @FUNCTION: has_hardened
517# @DESCRIPTION:
434# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 518# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
435has_hardened() { 519has_hardened() {
436 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 520 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
437 521
438 test_version_info Hardened && return 0 522 test_version_info Hardened && return 0
439 # The specs file wont exist unless gcc has GCC_SPECS support 523 # The specs file wont exist unless gcc has GCC_SPECS support
440 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 524 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
441} 525}
442 526
527# @FUNCTION: has_pic
528# @DESCRIPTION:
443# DEPRECATED - use gcc-specs-pie from toolchain-funcs 529# DEPRECATED - use gcc-specs-pie from toolchain-funcs
444# indicate whether PIC is set 530# indicate whether PIC is set
445has_pic() { 531has_pic() {
446 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 532 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
447 533
448 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 534 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
449 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \ 535 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
450 gcc-specs-pie 536 gcc-specs-pie
451} 537}
452 538
539# @FUNCTION: has_pie
540# @DESCRIPTION:
453# DEPRECATED - use gcc-specs-pie from toolchain-funcs 541# DEPRECATED - use gcc-specs-pie from toolchain-funcs
454# indicate whether PIE is set 542# indicate whether PIE is set
455has_pie() { 543has_pie() {
456 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 544 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
457 545
458 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 546 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
459 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \ 547 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
460 gcc-specs-pie 548 gcc-specs-pie
461} 549}
462 550
551# @FUNCTION: has_ssp_all
552# @DESCRIPTION:
463# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 553# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
464# indicate whether code for SSP is being generated for all functions 554# indicate whether code for SSP is being generated for all functions
465has_ssp_all() { 555has_ssp_all() {
466 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 556 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
467 557
469 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 559 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
470 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 560 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
471 gcc-specs-ssp-all 561 gcc-specs-ssp-all
472} 562}
473 563
564# @FUNCTION: has_ssp
565# @DESCRIPTION:
474# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 566# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
475# indicate whether code for SSP is being generated 567# indicate whether code for SSP is being generated
476has_ssp() { 568has_ssp() {
477 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 569 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
478 570
480 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 572 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
481 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 573 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
482 gcc-specs-ssp 574 gcc-specs-ssp
483} 575}
484 576
577# @FUNCTION: has_m64
578# @DESCRIPTION:
579# This doesn't test if the flag is accepted, it tests if the flag actually
580# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
581# return code is 0, else the return code is 1.
485has_m64() { 582has_m64() {
486 # this doesnt test if the flag is accepted, it tests if the flag 583 # this doesnt test if the flag is accepted, it tests if the flag
487 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 584 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
488 # please dont replace this function with test_flag in some future 585 # please dont replace this function with test_flag in some future
489 # clean-up! 586 # clean-up!
496 rm -f "${temp}".c 593 rm -f "${temp}".c
497 [[ ${ret} != 1 ]] && return 0 594 [[ ${ret} != 1 ]] && return 0
498 return 1 595 return 1
499} 596}
500 597
598# @FUNCTION: has_m32
599# @DESCRIPTION:
600# This doesn't test if the flag is accepted, it tests if the flag actually
601# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
602# code is 0, else return code is 1.
501has_m32() { 603has_m32() {
502 # this doesnt test if the flag is accepted, it tests if the flag 604 # this doesnt test if the flag is accepted, it tests if the flag
503 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 605 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
504 # please dont replace this function with test_flag in some future 606 # please dont replace this function with test_flag in some future
505 # clean-up! 607 # clean-up!
514 rm -f "${temp}".c 616 rm -f "${temp}".c
515 [[ ${ret} != 1 ]] && return 0 617 [[ ${ret} != 1 ]] && return 0
516 return 1 618 return 1
517} 619}
518 620
621# @FUNCTION: replace-sparc64-flags
622# @DESCRIPTION:
623# Sets mcpu to v8 and uses the original value as mtune if none specified.
519replace-sparc64-flags() { 624replace-sparc64-flags() {
520 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 625 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
521 626
522 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 627 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
523 for x in ${SPARC64_CPUS}; do 628 for x in ${SPARC64_CPUS}; do
524 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 629 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
525 done 630 done
526 else 631 else
527 for x in ${SPARC64_CPUS}; do 632 for x in ${SPARC64_CPUS}; do
528 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 633 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
529 done 634 done
530 fi 635 fi
531 636
532 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 637 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
533 for x in ${SPARC64_CPUS}; do 638 for x in ${SPARC64_CPUS}; do
534 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 639 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
535 done 640 done
536 else 641 else
537 for x in ${SPARC64_CPUS}; do 642 for x in ${SPARC64_CPUS}; do
538 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 643 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
539 done 644 done
540 fi 645 fi
541 646
542 export CFLAGS CXXFLAGS 647 export CFLAGS CXXFLAGS
543} 648}
544 649
650# @FUNCTION: append-ldflags
651# @USAGE: <flags>
652# @DESCRIPTION:
653# Add extra <flags> to the current LDFLAGS.
545append-ldflags() { 654append-ldflags() {
546 [[ -z $* ]] && return 0 655 [[ -z $* ]] && return 0
656 local flag
657 for flag in "$@"; do
658 [[ ${flag} == -l* ]] && \
659 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
660 done
661
547 export LDFLAGS="${LDFLAGS} $*" 662 export LDFLAGS="${LDFLAGS} $*"
548 return 0 663 return 0
549} 664}
550 665
551# Remove flags from LDFLAGS - it's up to the ebuild to filter 666# @FUNCTION: filter-ldflags
552# CFLAGS and CXXFLAGS via filter-flags if they need to. 667# @USAGE: <flags>
668# @DESCRIPTION:
669# Remove particular <flags> from LDFLAGS. Accepts shell globs.
553filter-ldflags() { 670filter-ldflags() {
554 _filter-var LDFLAGS "$@" 671 _filter-var LDFLAGS "$@"
555 return 0 672 return 0
556} 673}
557 674
675# @FUNCTION: raw-ldflags
676# @USAGE: <flags>
677# @DESCRIPTION:
558# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 678# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
559# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 679# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
560# to gcc where it needs the '-Wl,'. 680# to gcc where it needs the '-Wl,'.
561raw-ldflags() { 681raw-ldflags() {
562 local x input="$@" 682 local x input="$@"
567 set -- "$@" ${x//,/ } 687 set -- "$@" ${x//,/ }
568 done 688 done
569 echo "$@" 689 echo "$@"
570} 690}
571 691
572# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 692# @FUNCTION: bindnow-flags
573# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 693# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
574# fixes. 694# @DESCRIPTION:
575#
576# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
577gcc2-flags() {
578 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
579 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
580 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
581 fi
582
583 replace-cpu-flags k6-{2,3} k6
584 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
585
586 replace-cpu-flags pentium-mmx i586
587 replace-cpu-flags pentium{2,3,4} i686
588
589 replace-cpu-flags ev6{7,8} ev6
590
591 export CFLAGS CXXFLAGS
592}
593
594# Gets the flags needed for "NOW" binding 695# DEPRECATED - Gets the flags needed for "NOW" binding
595bindnow-flags() { 696bindnow-flags() {
697 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" >&2
698
596 case $($(tc-getLD) -v 2>&1 </dev/null) in 699 case $($(tc-getLD) -v 2>&1 </dev/null) in
597 *GNU* | *'with BFD'*) # GNU ld 700 *GNU* | *'with BFD'*) # GNU ld
598 echo "-Wl,-z,now" ;; 701 echo "-Wl,-z,now" ;;
599 *Apple*) # Darwin ld 702 *Apple*) # Darwin ld
600 echo "-bind_at_load" ;; 703 echo "-bind_at_load" ;;
605 echo "-Wl,-z,now" ;; 708 echo "-Wl,-z,now" ;;
606 esac 709 esac
607 ;; 710 ;;
608 esac 711 esac
609} 712}
713
714
715# Some tests for when we screw with things and want to make
716# sure we didn't break anything
717#TESTS() {
718# CFLAGS="-a -b -c=1"
719# CXXFLAGS="-x -y -z=2"
720# LDFLAGS="-l -m -n=3"
721#
722# die() { exit 1; }
723# (is-flag 1 2 3) && die
724# (is-ldflag 1 2 3) && die
725#
726# is-flagq -l && die
727# is-ldflagq -a && die
728# is-flagq -a || die
729# is-flagq -x || die
730# is-ldflagq -n=* || die
731# is-ldflagq -n && die
732#
733# strip-unsupported-flags
734# [[ ${CFLAGS} == "-c=1" ]] || die
735# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
736#
737# echo "All tests pass"
738#}
739#TESTS

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