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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 1.107 2006/04/15 00:44:16 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.124 2008/07/03 05:30:54 dberkholz 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="${ALLOWED_FLAGS} -fbounds-checking"
100 export ALLOWED_FLAGS="${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"
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 -D*"
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
159 eval new\[\${\#new\[@]}]=\${f} 99 eval new\[\${\#new\[@]}]=\${f}
160 done 100 done
161 eval export ${VAR}=\${new\[*]} 101 eval export ${VAR}=\${new\[*]}
162} 102}
163 103
104# @FUNCTION: filter-flags
105# @USAGE: <flags>
106# @DESCRIPTION:
107# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
164filter-flags() { 108filter-flags() {
165 _filter-hardened "$@" 109 _filter-hardened "$@"
166 _filter-var CFLAGS "$@" 110 _filter-var CFLAGS "$@"
111 _filter-var CPPFLAGS "$@"
167 _filter-var CXXFLAGS "$@" 112 _filter-var CXXFLAGS "$@"
113 _filter-var FFLAGS "$@"
114 _filter-var FCFLAGS "$@"
168 return 0 115 return 0
169} 116}
170 117
118# @FUNCTION: filter-lfs-flags
119# @DESCRIPTION:
120# Remove flags that enable Large File Support.
171filter-lfs-flags() { 121filter-lfs-flags() {
172 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 122 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
173 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 123 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
174} 124}
175 125
126# @FUNCTION: append-cppflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Add extra <flags> to the current CPPFLAGS.
130append-cppflags() {
131 [[ -z $* ]] && return 0
132 export CPPFLAGS="${CPPFLAGS} $*"
133 return 0
134}
135
136# @FUNCTION: append-fflags
137# @USAGE: <flags>
138# @DESCRIPTION:
139# Add extra <flags> to the current {F,FC}FLAGS.
140append-fflags() {
141 [[ -z $* ]] && return 0
142 export FFLAGS="${FFLAGS} $*"
143 export FCFLAGS="${FCFLAGS} $*"
144 return 0
145}
146
147# @FUNCTION: append-lfs-flags
148# @DESCRIPTION:
149# Add flags that enable Large File Support.
176append-lfs-flags() { 150append-lfs-flags() {
177 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 151 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
178 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 152 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
179} 153}
180 154
155# @FUNCTION: append-flags
156# @USAGE: <flags>
157# @DESCRIPTION:
158# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
181append-flags() { 159append-flags() {
182 [[ -z $* ]] && return 0 160 [[ -z $* ]] && return 0
183 export CFLAGS="${CFLAGS} $*" 161 export CFLAGS="${CFLAGS} $*"
184 export CXXFLAGS="${CXXFLAGS} $*" 162 export CXXFLAGS="${CXXFLAGS} $*"
163 export FFLAGS="${FFLAGS} $*"
164 export FCFLAGS="${FCFLAGS} $*"
185 return 0 165 return 0
186} 166}
187 167
168# @FUNCTION: replace-flags
169# @USAGE: <old> <new>
170# @DESCRIPTION:
171# Replace the <old> flag with <new>. Accepts shell globs for <old>.
188replace-flags() { 172replace-flags() {
189 [[ $# != 2 ]] \ 173 [[ $# != 2 ]] \
190 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
191 && die "replace-flags takes 2 arguments, not $#" 175 && die "replace-flags takes 2 arguments, not $#"
192 176
193 local f fset 177 local f fset
194 declare -a new_CFLAGS new_CXXFLAGS 178 declare -a new_CFLAGS new_CXXFLAGS
195 179
196 for fset in CFLAGS CXXFLAGS; do 180 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
197 # Looping over the flags instead of using a global 181 # Looping over the flags instead of using a global
198 # substitution ensures that we're working with flag atoms. 182 # substitution ensures that we're working with flag atoms.
199 # Otherwise globs like -O* have the potential to wipe out the 183 # Otherwise globs like -O* have the potential to wipe out the
200 # list of flags. 184 # list of flags.
201 for f in ${!fset}; do 185 for f in ${!fset}; do
207 done 191 done
208 192
209 return 0 193 return 0
210} 194}
211 195
196# @FUNCTION: replace-cpu-flags
197# @USAGE: <old> <new>
198# @DESCRIPTION:
199# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
200# with flags that select the <new> cpu. Accepts shell globs for <old>.
212replace-cpu-flags() { 201replace-cpu-flags() {
213 local newcpu="$#" ; newcpu="${!newcpu}" 202 local newcpu="$#" ; newcpu="${!newcpu}"
214 while [ $# -gt 1 ] ; do 203 while [ $# -gt 1 ] ; do
215 # quote to make sure that no globbing is done (particularly on 204 # quote to make sure that no globbing is done (particularly on
216 # ${oldcpu} prior to calling replace-flags 205 # ${oldcpu}) prior to calling replace-flags
217 replace-flags "-march=${1}" "-march=${newcpu}" 206 replace-flags "-march=${1}" "-march=${newcpu}"
218 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 207 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
219 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 208 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
220 shift 209 shift
221 done 210 done
222 return 0 211 return 0
223} 212}
224 213
214_is_flagq() {
215 local x
216 for x in ${!1} ; do
217 [[ ${x} == $2 ]] && return 0
218 done
219 return 1
220}
221
222# @FUNCTION: is-flagq
223# @USAGE: <flag>
224# @DESCRIPTION:
225# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
225is-flagq() { 226is-flagq() {
226 local x 227 [[ -n $2 ]] && die "Usage: is-flag <flag>"
227 228 _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} 229}
236 230
231# @FUNCTION: is-flag
232# @USAGE: <flag>
233# @DESCRIPTION:
234# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
237is-flag() { 235is-flag() {
238 if is-flagq ${1}; then 236 is-flagq "$@" && echo true
239 echo true
240 return 0
241 fi
242 return 1
243} 237}
244 238
239# @FUNCTION: is-ldflagq
240# @USAGE: <flag>
241# @DESCRIPTION:
242# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
245is-ldflagq() { 243is-ldflagq() {
246 local x 244 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
247 245 _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} 246}
256 247
248# @FUNCTION: is-ldflag
249# @USAGE: <flag>
250# @DESCRIPTION:
251# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
257is-ldflag() { 252is-ldflag() {
258 if is-ldflagq ${1}; then 253 is-ldflagq "$@" && echo true
259 echo true
260 return 0
261 fi
262 return 1
263} 254}
264 255
256# @FUNCTION: filter-mfpmath
257# @USAGE: <math types>
258# @DESCRIPTION:
259# Remove specified math types from the fpmath flag. For example, if the user
260# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
261# -mfpmath=386.
265filter-mfpmath() { 262filter-mfpmath() {
266 local orig_mfpmath new_math prune_math 263 local orig_mfpmath new_math prune_math
267 264
268 # save the original -mfpmath flag 265 # save the original -mfpmath flag
269 orig_mfpmath="`get-flag -mfpmath`" 266 orig_mfpmath=$(get-flag -mfpmath)
270 # get the value of the current -mfpmath flag 267 # get the value of the current -mfpmath flag
271 new_math=" `get-flag mfpmath | tr , ' '` " 268 new_math=$(get-flag mfpmath)
269 new_math=" ${new_math//,/ } "
272 # figure out which math values are to be removed 270 # figure out which math values are to be removed
273 prune_math="" 271 prune_math=""
274 for prune_math in "$@" ; do 272 for prune_math in "$@" ; do
275 new_math="${new_math/ ${prune_math} / }" 273 new_math=${new_math/ ${prune_math} / }
276 done 274 done
277 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 275 new_math=$(echo ${new_math})
276 new_math=${new_math// /,}
278 277
279 if [ -z "${new_math}" ] ; then 278 if [[ -z ${new_math} ]] ; then
280 # if we're removing all user specified math values are 279 # if we're removing all user specified math values are
281 # slated for removal, then we just filter the flag 280 # slated for removal, then we just filter the flag
282 filter-flags ${orig_mfpmath} 281 filter-flags ${orig_mfpmath}
283 else 282 else
284 # if we only want to filter some of the user specified 283 # if we only want to filter some of the user specified
286 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 285 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
287 fi 286 fi
288 return 0 287 return 0
289} 288}
290 289
290# @FUNCTION: strip-flags
291# @DESCRIPTION:
292# Strip C[XX]FLAGS of everything except known good/safe flags.
291strip-flags() { 293strip-flags() {
292 local x y flag NEW_CFLAGS NEW_CXXFLAGS 294 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
293 295
294 setup-allowed-flags 296 setup-allowed-flags
295 297
296 local NEW_CFLAGS="" 298 local NEW_CFLAGS=""
297 local NEW_CXXFLAGS="" 299 local NEW_CXXFLAGS=""
300 local NEW_FFLAGS=""
301 local NEW_FCFLAGS=""
298 302
299 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 303 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
300 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 304 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
301 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 305 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
302 fi 306 fi
321 break 325 break
322 fi 326 fi
323 done 327 done
324 done 328 done
325 329
330 for x in ${FFLAGS}; do
331 for y in ${ALLOWED_FLAGS}; do
332 flag=${x%%=*}
333 if [ "${flag%%${y}}" = "" ] ; then
334 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
335 break
336 fi
337 done
338 done
339
340 for x in ${FCFLAGS}; do
341 for y in ${ALLOWED_FLAGS}; do
342 flag=${x%%=*}
343 if [ "${flag%%${y}}" = "" ] ; then
344 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
345 break
346 fi
347 done
348 done
349
326 # In case we filtered out all optimization flags fallback to -O2 350 # In case we filtered out all optimization flags fallback to -O2
327 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 351 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
328 NEW_CFLAGS="${NEW_CFLAGS} -O2" 352 NEW_CFLAGS="${NEW_CFLAGS} -O2"
329 fi 353 fi
330 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 354 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
331 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 355 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
332 fi 356 fi
357 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
358 NEW_FFLAGS="${NEW_FFLAGS} -O2"
359 fi
360 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
361 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
362 fi
333 363
334 set +f # re-enable pathname expansion 364 set +f # re-enable pathname expansion
335 365
336 export CFLAGS="${NEW_CFLAGS}" 366 export CFLAGS="${NEW_CFLAGS}"
337 export CXXFLAGS="${NEW_CXXFLAGS}" 367 export CXXFLAGS="${NEW_CXXFLAGS}"
368 export FFLAGS="${NEW_FFLAGS}"
369 export FCFLAGS="${NEW_FCFLAGS}"
338 return 0 370 return 0
339} 371}
340 372
341test-flag-PROG() { 373test-flag-PROG() {
342 local comp=$1 374 local comp=$1
348 local PROG=$(tc-get${comp}) 380 local PROG=$(tc-get${comp})
349 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 381 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
350 > /dev/null 2>&1 382 > /dev/null 2>&1
351} 383}
352 384
353# Returns true if C compiler support given flag 385# @FUNCTION: test-flag-CC
386# @USAGE: <flag>
387# @DESCRIPTION:
388# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
354test-flag-CC() { test-flag-PROG "CC" "$1"; } 389test-flag-CC() { test-flag-PROG "CC" "$1"; }
355 390
356# Returns true if C++ compiler support given flag 391# @FUNCTION: test-flag-CXX
392# @USAGE: <flag>
393# @DESCRIPTION:
394# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
357test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 395test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
396
397# @FUNCTION: test-flag-F77
398# @USAGE: <flag>
399# @DESCRIPTION:
400# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
401test-flag-F77() { test-flag-PROG "F77" "$1"; }
402
403# @FUNCTION: test-flag-FC
404# @USAGE: <flag>
405# @DESCRIPTION:
406# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
407test-flag-FC() { test-flag-PROG "FC" "$1"; }
358 408
359test-flags-PROG() { 409test-flags-PROG() {
360 local comp=$1 410 local comp=$1
361 local flags 411 local flags
362 local x 412 local x
363 413
364 shift 414 shift
365 415
366 [[ -z ${comp} ]] && \ 416 [[ -z ${comp} ]] && return 1
367 return 1
368 417
418 x=""
369 for x in "$@" ; do 419 for x in "$@" ; do
370 test-flag-${comp} "${x}" && flags="${flags} ${x}" 420 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
371 done 421 done
372 422
373 echo "${flags}" 423 echo "${flags}"
374 424
375 # Just bail if we dont have any flags 425 # Just bail if we dont have any flags
376 [[ -n ${flags} ]] 426 [[ -n ${flags} ]]
377} 427}
378 428
379# Returns (echo's) the given flags supported by the C compiler 429# @FUNCTION: test-flags-CC
430# @USAGE: <flags>
431# @DESCRIPTION:
432# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
380test-flags-CC() { test-flags-PROG "CC" "$@"; } 433test-flags-CC() { test-flags-PROG "CC" "$@"; }
381 434
382# Returns (echo's) the given flags supported by the C++ compiler 435# @FUNCTION: test-flags-CXX
436# @USAGE: <flags>
437# @DESCRIPTION:
438# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
383test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 439test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
384 440
441# @FUNCTION: test-flags-F77
442# @USAGE: <flags>
443# @DESCRIPTION:
444# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
445test-flags-F77() { test-flags-PROG "F77" "$@"; }
446
447# @FUNCTION: test-flags-FC
448# @USAGE: <flags>
449# @DESCRIPTION:
450# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
451test-flags-FC() { test-flags-PROG "FC" "$@"; }
452
453# @FUNCTION: test-flags
454# @USAGE: <flags>
455# @DESCRIPTION:
385# Short-hand that should hopefully work for both C and C++ compiler, but 456# Short-hand that should hopefully work for both C and C++ compiler, but
386# its really only present due to the append-flags() abomination. 457# its really only present due to the append-flags() abomination.
387test-flags() { test-flags-CC "$@"; } 458test-flags() { test-flags-CC "$@"; }
388 459
389# Depriciated, use test-flags() 460# @FUNCTION: test_flag
461# @DESCRIPTION:
462# DEPRICIATED, use test-flags()
390test_flag() { 463test_flag() {
391 ewarn "test_flag: deprecated, please use test-flags()!" >&2 464 ewarn "test_flag: deprecated, please use test-flags()!" >&2
392 465
393 test-flags-CC "$@" 466 test-flags-CC "$@"
394} 467}
395 468
469# @FUNCTION: test_version_info
470# @USAGE: <version>
471# @DESCRIPTION:
472# Returns shell true if the current C compiler version matches <version>, else returns shell false.
473# Accepts shell globs.
396test_version_info() { 474test_version_info() {
397 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 475 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
398 return 0 476 return 0
399 else 477 else
400 return 1 478 return 1
401 fi 479 fi
402} 480}
403 481
482# @FUNCTION: strip-unsupported-flags
483# @DESCRIPTION:
484# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
404strip-unsupported-flags() { 485strip-unsupported-flags() {
405 local x NEW_CFLAGS NEW_CXXFLAGS 486 export CFLAGS=$(test-flags-CC ${CFLAGS})
406 487 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
407 for x in ${CFLAGS} ; do 488 export FFLAGS=$(test-flags-F77 ${FFLAGS})
408 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})" 489 export FCFLAGS=$(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} 490}
417 491
492# @FUNCTION: get-flag
493# @USAGE: <flag>
494# @DESCRIPTION:
495# Find and echo the value for a particular flag. Accepts shell globs.
418get-flag() { 496get-flag() {
419 local f findflag="$1" 497 local f findflag="$1"
420 498
421 # this code looks a little flaky but seems to work for 499 # this code looks a little flaky but seems to work for
422 # everything we want ... 500 # everything we want ...
423 # for example, if CFLAGS="-march=i686": 501 # for example, if CFLAGS="-march=i686":
424 # `get-flag -march` == "-march=i686" 502 # `get-flag -march` == "-march=i686"
425 # `get-flag march` == "i686" 503 # `get-flag march` == "i686"
426 for f in ${CFLAGS} ${CXXFLAGS} ; do 504 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
427 if [ "${f/${findflag}}" != "${f}" ] ; then 505 if [ "${f/${findflag}}" != "${f}" ] ; then
428 printf "%s\n" "${f/-${findflag}=}" 506 printf "%s\n" "${f/-${findflag}=}"
429 return 0 507 return 0
430 fi 508 fi
431 done 509 done
432 return 1 510 return 1
433} 511}
434 512
513# @FUNCTION: has_hardened
514# @DESCRIPTION:
435# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 515# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
436has_hardened() { 516has_hardened() {
437 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 517 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
438 518
439 test_version_info Hardened && return 0 519 test_version_info Hardened && return 0
440 # The specs file wont exist unless gcc has GCC_SPECS support 520 # The specs file wont exist unless gcc has GCC_SPECS support
441 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 521 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
442} 522}
443 523
524# @FUNCTION: has_pic
525# @DESCRIPTION:
444# DEPRECATED - use gcc-specs-pie from toolchain-funcs 526# DEPRECATED - use gcc-specs-pie from toolchain-funcs
445# indicate whether PIC is set 527# indicate whether PIC is set
446has_pic() { 528has_pic() {
447 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 529 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
448 530
449 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 531 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
450 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \ 532 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
451 gcc-specs-pie 533 gcc-specs-pie
452} 534}
453 535
536# @FUNCTION: has_pie
537# @DESCRIPTION:
454# DEPRECATED - use gcc-specs-pie from toolchain-funcs 538# DEPRECATED - use gcc-specs-pie from toolchain-funcs
455# indicate whether PIE is set 539# indicate whether PIE is set
456has_pie() { 540has_pie() {
457 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 541 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
458 542
459 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 543 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
460 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \ 544 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
461 gcc-specs-pie 545 gcc-specs-pie
462} 546}
463 547
548# @FUNCTION: has_ssp_all
549# @DESCRIPTION:
464# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 550# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
465# indicate whether code for SSP is being generated for all functions 551# indicate whether code for SSP is being generated for all functions
466has_ssp_all() { 552has_ssp_all() {
467 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 553 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
468 554
470 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 556 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
471 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 557 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
472 gcc-specs-ssp-all 558 gcc-specs-ssp-all
473} 559}
474 560
561# @FUNCTION: has_ssp
562# @DESCRIPTION:
475# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 563# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
476# indicate whether code for SSP is being generated 564# indicate whether code for SSP is being generated
477has_ssp() { 565has_ssp() {
478 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 566 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
479 567
481 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 569 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
482 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 570 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
483 gcc-specs-ssp 571 gcc-specs-ssp
484} 572}
485 573
574# @FUNCTION: has_m64
575# @DESCRIPTION:
576# This doesn't test if the flag is accepted, it tests if the flag actually
577# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
578# return code is 0, else the return code is 1.
486has_m64() { 579has_m64() {
487 # this doesnt test if the flag is accepted, it tests if the flag 580 # this doesnt test if the flag is accepted, it tests if the flag
488 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 581 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
489 # please dont replace this function with test_flag in some future 582 # please dont replace this function with test_flag in some future
490 # clean-up! 583 # clean-up!
497 rm -f "${temp}".c 590 rm -f "${temp}".c
498 [[ ${ret} != 1 ]] && return 0 591 [[ ${ret} != 1 ]] && return 0
499 return 1 592 return 1
500} 593}
501 594
595# @FUNCTION: has_m32
596# @DESCRIPTION:
597# This doesn't test if the flag is accepted, it tests if the flag actually
598# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
599# code is 0, else return code is 1.
502has_m32() { 600has_m32() {
503 # this doesnt test if the flag is accepted, it tests if the flag 601 # this doesnt test if the flag is accepted, it tests if the flag
504 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 602 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
505 # please dont replace this function with test_flag in some future 603 # please dont replace this function with test_flag in some future
506 # clean-up! 604 # clean-up!
515 rm -f "${temp}".c 613 rm -f "${temp}".c
516 [[ ${ret} != 1 ]] && return 0 614 [[ ${ret} != 1 ]] && return 0
517 return 1 615 return 1
518} 616}
519 617
618# @FUNCTION: replace-sparc64-flags
619# @DESCRIPTION:
620# Sets mcpu to v8 and uses the original value as mtune if none specified.
520replace-sparc64-flags() { 621replace-sparc64-flags() {
521 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 622 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
522 623
523 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 624 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
524 for x in ${SPARC64_CPUS}; do 625 for x in ${SPARC64_CPUS}; do
525 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 626 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
526 done 627 done
527 else 628 else
528 for x in ${SPARC64_CPUS}; do 629 for x in ${SPARC64_CPUS}; do
529 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 630 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
530 done 631 done
531 fi 632 fi
532 633
533 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 634 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
534 for x in ${SPARC64_CPUS}; do 635 for x in ${SPARC64_CPUS}; do
535 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 636 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
536 done 637 done
537 else 638 else
538 for x in ${SPARC64_CPUS}; do 639 for x in ${SPARC64_CPUS}; do
539 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 640 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
540 done 641 done
541 fi 642 fi
542 643
543 export CFLAGS CXXFLAGS 644 export CFLAGS CXXFLAGS
544} 645}
545 646
647# @FUNCTION: append-ldflags
648# @USAGE: <flags>
649# @DESCRIPTION:
650# Add extra <flags> to the current LDFLAGS.
546append-ldflags() { 651append-ldflags() {
547 [[ -z $* ]] && return 0 652 [[ -z $* ]] && return 0
653 local flag
654 for flag in "$@"; do
655 [[ ${flag} == -l* ]] && \
656 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
657 done
658
548 export LDFLAGS="${LDFLAGS} $*" 659 export LDFLAGS="${LDFLAGS} $*"
549 return 0 660 return 0
550} 661}
551 662
552# Remove flags from LDFLAGS - it's up to the ebuild to filter 663# @FUNCTION: filter-ldflags
553# CFLAGS and CXXFLAGS via filter-flags if they need to. 664# @USAGE: <flags>
665# @DESCRIPTION:
666# Remove particular <flags> from LDFLAGS. Accepts shell globs.
554filter-ldflags() { 667filter-ldflags() {
555 _filter-var LDFLAGS "$@" 668 _filter-var LDFLAGS "$@"
556 return 0 669 return 0
557} 670}
558 671
672# @FUNCTION: raw-ldflags
673# @USAGE: <flags>
674# @DESCRIPTION:
559# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 675# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
560# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 676# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
561# to gcc where it needs the '-Wl,'. 677# to gcc where it needs the '-Wl,'.
562raw-ldflags() { 678raw-ldflags() {
563 local x input="$@" 679 local x input="$@"
568 set -- "$@" ${x//,/ } 684 set -- "$@" ${x//,/ }
569 done 685 done
570 echo "$@" 686 echo "$@"
571} 687}
572 688
573# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 689# @FUNCTION: bindnow-flags
574# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 690# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
575# fixes. 691# @DESCRIPTION:
576#
577# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
578gcc2-flags() {
579 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
580 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
581 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
582 fi
583
584 replace-cpu-flags k6-{2,3} k6
585 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
586
587 replace-cpu-flags pentium-mmx i586
588 replace-cpu-flags pentium{2,3,4} i686
589
590 replace-cpu-flags ev6{7,8} ev6
591
592 export CFLAGS CXXFLAGS
593}
594
595# Gets the flags needed for "NOW" binding 692# DEPRECATED - Gets the flags needed for "NOW" binding
596bindnow-flags() { 693bindnow-flags() {
694 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" >&2
695
597 case $($(tc-getLD) -v 2>&1 </dev/null) in 696 case $($(tc-getLD) -v 2>&1 </dev/null) in
598 *GNU* | *'with BFD'*) # GNU ld 697 *GNU* | *'with BFD'*) # GNU ld
599 echo "-Wl,-z,now" ;; 698 echo "-Wl,-z,now" ;;
600 *Apple*) # Darwin ld 699 *Apple*) # Darwin ld
601 echo "-bind_at_load" ;; 700 echo "-bind_at_load" ;;
606 echo "-Wl,-z,now" ;; 705 echo "-Wl,-z,now" ;;
607 esac 706 esac
608 ;; 707 ;;
609 esac 708 esac
610} 709}
710
711
712# Some tests for when we screw with things and want to make
713# sure we didn't break anything
714#TESTS() {
715# CFLAGS="-a -b -c=1"
716# CXXFLAGS="-x -y -z=2"
717# LDFLAGS="-l -m -n=3"
718#
719# die() { exit 1; }
720# (is-flag 1 2 3) && die
721# (is-ldflag 1 2 3) && die
722#
723# is-flagq -l && die
724# is-ldflagq -a && die
725# is-flagq -a || die
726# is-flagq -x || die
727# is-ldflagq -n=* || die
728# is-ldflagq -n && die
729#
730# strip-unsupported-flags
731# [[ ${CFLAGS} == "-c=1" ]] || die
732# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
733#
734# echo "All tests pass"
735#}
736#TESTS

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