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Revision 1.40 Revision 1.164
1# Copyright 1999-2003 Gentoo Technologies, Inc. 1# Copyright 1999-2011 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 1.40 2004/03/12 11:21:15 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.164 2012/01/13 22:40:29 vapier Exp $
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.
12
13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15
16inherit eutils toolchain-funcs multilib
17
18################ DEPRECATED functions ################
19# The following are still present to avoid breaking existing
20# code more than necessary; however they are deprecated. Please
21# use gcc-specs-* from toolchain-funcs.eclass instead, if you
22# need to know which hardened techs are active in the compiler.
23# See bug #100974
4# 24#
5# Author Bart Verwilst <verwilst@gentoo.org> 25# has_hardened
26# has_pie
27# has_pic
28# has_ssp_all
29# has_ssp
6 30
7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS"
9 31
10#
11#### filter-flags <flags> ####
12# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags
14#
15#### append-flags <flags> ####
16# Add extra flags to your current C[XX]FLAGS
17#
18#### replace-flags <orig.flag> <new.flag> ###
19# Replace a flag by another one
20#
21#### replace-cpu-flags <new.cpu> <old.cpus> ###
22# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu>
24#
25#### is-flag <flag> ####
26# Returns "true" if flag is set in C[XX]FLAGS
27# Matches only complete a flag
28#
29#### strip-flags ####
30# Strip C[XX]FLAGS of everything except known
31# good options.
32#
33#### strip-unsupported-flags ####
34# Strip C[XX]FLAGS of any flags not supported by
35# installed version of gcc
36#
37#### get-flag <flag> ####
38# Find and echo the value for a particular flag
39#
40#### replace-sparc64-flags ####
41# Sets mcpu to v8 and uses the original value
42# as mtune if none specified.
43#
44#### filter-mfpmath <math types> ####
45# Remove specified math types from the fpmath specification
46# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
47# will leave the user with -mfpmath=386
48#
49#### append-ldflags ####
50# Add extra flags to your current LDFLAGS
51#
52#### etexec-flags ####
53# hooked function for hardened-gcc that appends
54# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
55# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
56#
57#### fstack-flags ####
58# hooked function for hardened-gcc that appends
59# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
60# and a package is filtering -fstack-protector, -fstack-protector-all
61#
62
63# C[XX]FLAGS that we allow in strip-flags 32# {C,CXX,F,FC}FLAGS that we allow in strip-flags
33# Note: shell globs and character lists are allowed
64setup-allowed-flags() { 34setup-allowed-flags() {
65 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 35 ALLOWED_FLAGS="-pipe"
36 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
37 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
38 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
39 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
40 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
41 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
42 ALLOWED_FLAGS+=" -W* -w"
43
44 # allow a bunch of flags that negate features / control ABI
45 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
46 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
47 -fno-omit-frame-pointer"
48 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
49 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
50 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
51 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
52 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
53 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
54 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
55 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
56 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
57 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
58
59 # 4.5
60 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
61 # 4.6
62 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
63
64 export ALLOWED_FLAGS
65 return 0
66}
67
68# inverted filters for hardened compiler. This is trying to unpick
69# the hardened compiler defaults.
70_filter-hardened() {
71 local f
72 for f in "$@" ; do
66 case "${ARCH}" in 73 case "${f}" in
67 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 74 # Ideally we should only concern ourselves with PIE flags,
68 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 75 # not -fPIC or -fpic, but too many places filter -fPIC without
69 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 76 # thinking about -fPIE.
70 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 77 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
78 gcc-specs-pie || continue
79 is-flagq -nopie || append-flags -nopie;;
80 -fstack-protector)
81 gcc-specs-ssp || continue
82 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
83 -fstack-protector-all)
84 gcc-specs-ssp-to-all || continue
85 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
86 -fno-strict-overflow)
87 gcc-specs-nostrict || continue
88 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
71 esac 89 esac
72 90 done
73 # C[XX]FLAGS that we are think is ok, but needs testing
74 # NOTE: currently -Os have issues with gcc3 and K6* arch's
75 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
76 return 0
77} 91}
78 92
93# Remove occurrences of strings from variable given in $1
94# Strings removed are matched as globs, so for example
95# '-O*' would remove -O1, -O2 etc.
96_filter-var() {
97 local f x VAR VAL
98 declare -a new
99
100 VAR=$1
101 shift
102 eval VAL=\${${VAR}}
103 for f in ${VAL}; do
104 for x in "$@"; do
105 # Note this should work with globs like -O*
106 [[ ${f} == ${x} ]] && continue 2
107 done
108 eval new\[\${\#new\[@]}]=\${f}
109 done
110 eval export ${VAR}=\${new\[*]}
111}
112
113# @FUNCTION: filter-flags
114# @USAGE: <flags>
115# @DESCRIPTION:
116# Remove particular <flags> from {C,CPP,CXX,F,FC,LD}FLAGS. Accepts shell globs.
79filter-flags() { 117filter-flags() {
80 for x in "$@" ; do 118 _filter-hardened "$@"
81 case "${x}" in 119 local v
82 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 120 for v in C CPP CXX F FC LD ; do
83 -fstack-protector|-fstack-protector-all) fstack-flags;; 121 _filter-var ${v}FLAGS "$@"
84 *) ;;
85 esac
86 done 122 done
87
88 # we do this fancy spacing stuff so as to not filter
89 # out part of a flag ... we want flag atoms ! :D
90 CFLAGS=" ${CFLAGS} "
91 CXXFLAGS=" ${CXXFLAGS} "
92 for x in "$@" ; do
93 CFLAGS="${CFLAGS// ${x} / }"
94 CXXFLAGS="${CXXFLAGS// ${x} / }"
95 done
96 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
97 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
98 return 0 123 return 0
99} 124}
100 125
126# @FUNCTION: filter-lfs-flags
127# @DESCRIPTION:
128# Remove flags that enable Large File Support.
101filter-lfs-flags() { 129filter-lfs-flags() {
130 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
131 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
132 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
133 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
134 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
102 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 135 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
103} 136}
104 137
138# @FUNCTION: append-cppflags
139# @USAGE: <flags>
140# @DESCRIPTION:
141# Add extra <flags> to the current CPPFLAGS.
142append-cppflags() {
143 [[ $# -eq 0 ]] && return 0
144 export CPPFLAGS="${CPPFLAGS} $*"
145 return 0
146}
147
148# @FUNCTION: append-cflags
149# @USAGE: <flags>
150# @DESCRIPTION:
151# Add extra <flags> to the current CFLAGS.
152append-cflags() {
153 [[ $# -eq 0 ]] && return 0
154 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
155 return 0
156}
157
158# @FUNCTION: append-cxxflags
159# @USAGE: <flags>
160# @DESCRIPTION:
161# Add extra <flags> to the current CXXFLAGS.
162append-cxxflags() {
163 [[ $# -eq 0 ]] && return 0
164 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
165 return 0
166}
167
168# @FUNCTION: append-fflags
169# @USAGE: <flags>
170# @DESCRIPTION:
171# Add extra <flags> to the current {F,FC}FLAGS.
172append-fflags() {
173 [[ $# -eq 0 ]] && return 0
174 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
175 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
176 return 0
177}
178
179# @FUNCTION: append-lfs-flags
180# @DESCRIPTION:
181# Add flags that enable Large File Support.
182append-lfs-flags() {
183 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
184 # see comments in filter-lfs-flags func for meaning of these
185 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
186}
187
188# @FUNCTION: append-flags
189# @USAGE: <flags>
190# @DESCRIPTION:
191# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
105append-flags() { 192append-flags() {
106 export CFLAGS="${CFLAGS} $@" 193 [[ $# -eq 0 ]] && return 0
107 export CXXFLAGS="${CXXFLAGS} $@" 194 append-cflags "$@"
108 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags 195 append-cxxflags "$@"
196 append-fflags "$@"
109 return 0 197 return 0
110} 198}
111 199
200# @FUNCTION: replace-flags
201# @USAGE: <old> <new>
202# @DESCRIPTION:
203# Replace the <old> flag with <new>. Accepts shell globs for <old>.
112replace-flags() { 204replace-flags() {
113 # we do this fancy spacing stuff so as to not filter 205 [[ $# != 2 ]] \
114 # out part of a flag ... we want flag atoms ! :D 206 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
115 CFLAGS=" ${CFLAGS} " 207 && die "replace-flags takes 2 arguments, not $#"
116 CXXFLAGS=" ${CXXFLAGS} "
117 CFLAGS="${CFLAGS// ${1} / ${2} }"
118 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
119 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
120 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
121 return 0
122}
123 208
209 local f fset
210 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
211
212 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
213 # Looping over the flags instead of using a global
214 # substitution ensures that we're working with flag atoms.
215 # Otherwise globs like -O* have the potential to wipe out the
216 # list of flags.
217 for f in ${!fset}; do
218 # Note this should work with globs like -O*
219 [[ ${f} == ${1} ]] && f=${2}
220 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
221 done
222 eval export ${fset}=\${new_${fset}\[*]}
223 done
224
225 return 0
226}
227
228# @FUNCTION: replace-cpu-flags
229# @USAGE: <old> <new>
230# @DESCRIPTION:
231# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
232# with flags that select the <new> cpu. Accepts shell globs for <old>.
124replace-cpu-flags() { 233replace-cpu-flags() {
125 local newcpu="$1" ; shift 234 local newcpu="$#" ; newcpu="${!newcpu}"
126 local oldcpu="" 235 while [ $# -gt 1 ] ; do
127 for oldcpu in "$@" ; do 236 # quote to make sure that no globbing is done (particularly on
237 # ${oldcpu}) prior to calling replace-flags
128 replace-flags -march=${oldcpu} -march=${newcpu} 238 replace-flags "-march=${1}" "-march=${newcpu}"
129 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 239 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
130 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 240 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
241 shift
131 done 242 done
243 return 0
244}
245
246_is_flagq() {
247 local x
248 for x in ${!1} ; do
249 [[ ${x} == $2 ]] && return 0
250 done
132 return 0 251 return 1
133} 252}
134 253
254# @FUNCTION: is-flagq
255# @USAGE: <flag>
256# @DESCRIPTION:
257# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
258is-flagq() {
259 [[ -n $2 ]] && die "Usage: is-flag <flag>"
260 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
261}
262
263# @FUNCTION: is-flag
264# @USAGE: <flag>
265# @DESCRIPTION:
266# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
135is-flag() { 267is-flag() {
136 for x in ${CFLAGS} ${CXXFLAGS} ; do 268 is-flagq "$@" && echo true
137 if [ "${x}" == "$1" ] ; then
138 echo true
139 return 0
140 fi
141 done
142 return 1
143} 269}
144 270
271# @FUNCTION: is-ldflagq
272# @USAGE: <flag>
273# @DESCRIPTION:
274# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
275is-ldflagq() {
276 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
277 _is_flagq LDFLAGS $1
278}
279
280# @FUNCTION: is-ldflag
281# @USAGE: <flag>
282# @DESCRIPTION:
283# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
284is-ldflag() {
285 is-ldflagq "$@" && echo true
286}
287
288# @FUNCTION: filter-mfpmath
289# @USAGE: <math types>
290# @DESCRIPTION:
291# Remove specified math types from the fpmath flag. For example, if the user
292# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
293# -mfpmath=386.
145filter-mfpmath() { 294filter-mfpmath() {
295 local orig_mfpmath new_math prune_math
296
146 # save the original -mfpmath flag 297 # save the original -mfpmath flag
147 local orig_mfpmath="`get-flag -mfpmath`" 298 orig_mfpmath=$(get-flag -mfpmath)
148 # get the value of the current -mfpmath flag 299 # get the value of the current -mfpmath flag
149 local new_math=" `get-flag mfpmath | tr , ' '` " 300 new_math=$(get-flag mfpmath)
301 new_math=" ${new_math//,/ } "
150 # figure out which math values are to be removed 302 # figure out which math values are to be removed
151 local prune_math="" 303 prune_math=""
152 for prune_math in "$@" ; do 304 for prune_math in "$@" ; do
153 new_math="${new_math/ ${prune_math} / }" 305 new_math=${new_math/ ${prune_math} / }
154 done 306 done
155 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 307 new_math=$(echo ${new_math})
308 new_math=${new_math// /,}
156 309
157 if [ -z "${new_math}" ] ; then 310 if [[ -z ${new_math} ]] ; then
158 # if we're removing all user specified math values are 311 # if we're removing all user specified math values are
159 # slated for removal, then we just filter the flag 312 # slated for removal, then we just filter the flag
160 filter-flags ${orig_mfpmath} 313 filter-flags ${orig_mfpmath}
161 else 314 else
162 # if we only want to filter some of the user specified 315 # if we only want to filter some of the user specified
164 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 317 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
165 fi 318 fi
166 return 0 319 return 0
167} 320}
168 321
322# @FUNCTION: strip-flags
323# @DESCRIPTION:
324# Strip C[XX]FLAGS of everything except known good/safe flags.
169strip-flags() { 325strip-flags() {
326 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
327
170 setup-allowed-flags 328 setup-allowed-flags
171 329
172 local NEW_CFLAGS="" 330 local NEW_CFLAGS=""
173 local NEW_CXXFLAGS="" 331 local NEW_CXXFLAGS=""
332 local NEW_FFLAGS=""
333 local NEW_FCFLAGS=""
174 334
175 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 335 set -f # disable pathname expansion
176 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
177 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
178 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
179 fi
180 336
181 set -f
182
183 for x in ${CFLAGS} 337 for x in ${CFLAGS}; do
184 do
185 for y in ${ALLOWED_FLAGS} 338 for y in ${ALLOWED_FLAGS}; do
186 do
187 flag=${x%%=*} 339 flag=${x%%=*}
188 if [ "${flag%%${y}}" = "" ] 340 if [ "${flag%%${y}}" = "" ] ; then
189 then
190 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 341 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
191 break 342 break
192 fi 343 fi
193 done 344 done
194 done 345 done
195 346
196 for x in ${CXXFLAGS} 347 for x in ${CXXFLAGS}; do
197 do
198 for y in ${ALLOWED_FLAGS} 348 for y in ${ALLOWED_FLAGS}; do
199 do
200 flag=${x%%=*} 349 flag=${x%%=*}
201 if [ "${flag%%${y}}" = "" ] 350 if [ "${flag%%${y}}" = "" ] ; then
202 then
203 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 351 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
204 break 352 break
205 fi 353 fi
206 done 354 done
207 done 355 done
208 356
357 for x in ${FFLAGS}; do
358 for y in ${ALLOWED_FLAGS}; do
359 flag=${x%%=*}
360 if [ "${flag%%${y}}" = "" ] ; then
361 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
362 break
363 fi
364 done
365 done
366
367 for x in ${FCFLAGS}; do
368 for y in ${ALLOWED_FLAGS}; do
369 flag=${x%%=*}
370 if [ "${flag%%${y}}" = "" ] ; then
371 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
372 break
373 fi
374 done
375 done
376
209 # In case we filtered out all optimization flags fallback to -O2 377 # In case we filtered out all optimization flags fallback to -O2
210 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 378 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
211 NEW_CFLAGS="${NEW_CFLAGS} -O2" 379 NEW_CFLAGS="${NEW_CFLAGS} -O2"
212 fi 380 fi
213 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 381 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
214 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 382 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
215 fi 383 fi
384 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
385 NEW_FFLAGS="${NEW_FFLAGS} -O2"
386 fi
387 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
388 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
389 fi
216 390
217 set +f 391 set +f # re-enable pathname expansion
218
219 [ `use debug` ] \
220 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
221 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
222 392
223 export CFLAGS="${NEW_CFLAGS}" 393 export CFLAGS="${NEW_CFLAGS}"
224 export CXXFLAGS="${NEW_CXXFLAGS}" 394 export CXXFLAGS="${NEW_CXXFLAGS}"
395 export FFLAGS="${NEW_FFLAGS}"
396 export FCFLAGS="${NEW_FCFLAGS}"
225 return 0 397 return 0
226} 398}
227 399
228test_flag() { 400test-flag-PROG() {
229 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then 401 local comp=$1
230 echo "$@" 402 local flags="$2"
403
404 [[ -z ${comp} || -z ${flags} ]] && return 1
405
406 # use -c so we can test the assembler as well
407 local PROG=$(tc-get${comp})
408 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
409 > /dev/null 2>&1
410}
411
412# @FUNCTION: test-flag-CC
413# @USAGE: <flag>
414# @DESCRIPTION:
415# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
416test-flag-CC() { test-flag-PROG "CC" "$1"; }
417
418# @FUNCTION: test-flag-CXX
419# @USAGE: <flag>
420# @DESCRIPTION:
421# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
422test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
423
424# @FUNCTION: test-flag-F77
425# @USAGE: <flag>
426# @DESCRIPTION:
427# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
428test-flag-F77() { test-flag-PROG "F77" "$1"; }
429
430# @FUNCTION: test-flag-FC
431# @USAGE: <flag>
432# @DESCRIPTION:
433# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
434test-flag-FC() { test-flag-PROG "FC" "$1"; }
435
436test-flags-PROG() {
437 local comp=$1
438 local flags
439 local x
440
441 shift
442
443 [[ -z ${comp} ]] && return 1
444
445 for x in "$@" ; do
446 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
447 done
448
449 echo "${flags}"
450
451 # Just bail if we dont have any flags
452 [[ -n ${flags} ]]
453}
454
455# @FUNCTION: test-flags-CC
456# @USAGE: <flags>
457# @DESCRIPTION:
458# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
459test-flags-CC() { test-flags-PROG "CC" "$@"; }
460
461# @FUNCTION: test-flags-CXX
462# @USAGE: <flags>
463# @DESCRIPTION:
464# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
465test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
466
467# @FUNCTION: test-flags-F77
468# @USAGE: <flags>
469# @DESCRIPTION:
470# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
471test-flags-F77() { test-flags-PROG "F77" "$@"; }
472
473# @FUNCTION: test-flags-FC
474# @USAGE: <flags>
475# @DESCRIPTION:
476# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
477test-flags-FC() { test-flags-PROG "FC" "$@"; }
478
479# @FUNCTION: test-flags
480# @USAGE: <flags>
481# @DESCRIPTION:
482# Short-hand that should hopefully work for both C and C++ compiler, but
483# its really only present due to the append-flags() abomination.
484test-flags() { test-flags-CC "$@"; }
485
486# @FUNCTION: test_version_info
487# @USAGE: <version>
488# @DESCRIPTION:
489# Returns shell true if the current C compiler version matches <version>, else returns shell false.
490# Accepts shell globs.
491test_version_info() {
492 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
231 return 0 493 return 0
232 fi 494 else
233 return 1 495 return 1
496 fi
234} 497}
235 498
499# @FUNCTION: strip-unsupported-flags
500# @DESCRIPTION:
501# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
236strip-unsupported-flags() { 502strip-unsupported-flags() {
237 for x in ${CFLAGS} ; do 503 export CFLAGS=$(test-flags-CC ${CFLAGS})
238 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 504 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
239 done 505 export FFLAGS=$(test-flags-F77 ${FFLAGS})
240 for x in ${CXXFLAGS} ; do 506 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
241 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
242 done
243
244 export CFLAGS="${NEW_CFLAGS}"
245 export CXXFLAGS="${NEW_CXXFLAGS}"
246} 507}
247 508
509# @FUNCTION: get-flag
510# @USAGE: <flag>
511# @DESCRIPTION:
512# Find and echo the value for a particular flag. Accepts shell globs.
248get-flag() { 513get-flag() {
514 local f findflag="$1"
515
249 # this code looks a little flaky but seems to work for 516 # this code looks a little flaky but seems to work for
250 # everything we want ... 517 # everything we want ...
251 # for example, if CFLAGS="-march=i686": 518 # for example, if CFLAGS="-march=i686":
252 # `get-flags -march` == "-march=i686" 519 # `get-flag -march` == "-march=i686"
253 # `get-flags march` == "i686" 520 # `get-flag march` == "i686"
254 local findflag="$1"
255 for f in ${CFLAGS} ${CXXFLAGS} ; do 521 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
256 if [ "${f/${findflag}}" != "${f}" ] ; then 522 if [ "${f/${findflag}}" != "${f}" ] ; then
257 echo "${f/-${findflag}=}" 523 printf "%s\n" "${f/-${findflag}=}"
258 return 0 524 return 0
259 fi 525 fi
260 done 526 done
261 return 1 527 return 1
262} 528}
263 529
530# DEAD FUNCS. Remove by Dec 2011.
531test_flag() { die "$0: deprecated, please use test-flags()!" ; }
532has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
533has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
534has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
535has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
536has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
537
538# @FUNCTION: has_m64
539# @DESCRIPTION:
540# This doesn't test if the flag is accepted, it tests if the flag actually
541# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
542# return code is 0, else the return code is 1.
543has_m64() {
544 # this doesnt test if the flag is accepted, it tests if the flag
545 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
546 # please dont replace this function with test_flag in some future
547 # clean-up!
548
549 local temp="$(emktemp)"
550 echo "int main() { return(0); }" > "${temp}".c
551 MY_CC=$(tc-getCC)
552 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
553 local ret=$?
554 rm -f "${temp}".c
555 [[ ${ret} != 1 ]] && return 0
556 return 1
557}
558
559# @FUNCTION: has_m32
560# @DESCRIPTION:
561# This doesn't test if the flag is accepted, it tests if the flag actually
562# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
563# code is 0, else return code is 1.
564has_m32() {
565 # this doesnt test if the flag is accepted, it tests if the flag
566 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
567 # please dont replace this function with test_flag in some future
568 # clean-up!
569
570 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
571
572 local temp=$(emktemp)
573 echo "int main() { return(0); }" > "${temp}".c
574 MY_CC=$(tc-getCC)
575 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
576 local ret=$?
577 rm -f "${temp}".c
578 [[ ${ret} != 1 ]] && return 0
579 return 1
580}
581
582# @FUNCTION: replace-sparc64-flags
583# @DESCRIPTION:
584# Sets mcpu to v8 and uses the original value as mtune if none specified.
264replace-sparc64-flags() { 585replace-sparc64-flags() {
265 local SPARC64_CPUS="ultrasparc v9" 586 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
266 587
267 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 588 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
268 then
269 for x in ${SPARC64_CPUS} 589 for x in ${SPARC64_CPUS}; do
270 do
271 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 590 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
272 done 591 done
273 else 592 else
274 for x in ${SPARC64_CPUS} 593 for x in ${SPARC64_CPUS}; do
275 do
276 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 594 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
277 done 595 done
278 fi 596 fi
279 597
280 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 598 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
281 then
282 for x in ${SPARC64_CPUS} 599 for x in ${SPARC64_CPUS}; do
283 do
284 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 600 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
285 done 601 done
286 else 602 else
287 for x in ${SPARC64_CPUS} 603 for x in ${SPARC64_CPUS}; do
288 do
289 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 604 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
290 done 605 done
291 fi 606 fi
292}
293 607
608 export CFLAGS CXXFLAGS
609}
610
611# @FUNCTION: append-libs
612# @USAGE: <libs>
613# @DESCRIPTION:
614# Add extra <libs> to the current LIBS.
615append-libs() {
616 [[ $# -eq 0 ]] && return 0
617 local flag
618 for flag in "$@"; do
619 [[ ${flag} == -l* ]] && flag=${flag#-l}
620 export LIBS="${LIBS} -l${flag}"
621 done
622
623 return 0
624}
625
626# @FUNCTION: append-ldflags
627# @USAGE: <flags>
628# @DESCRIPTION:
629# Add extra <flags> to the current LDFLAGS.
294append-ldflags() { 630append-ldflags() {
631 [[ $# -eq 0 ]] && return 0
632 local flag
633 for flag in "$@"; do
634 [[ ${flag} == -l* ]] && \
635 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
636 done
637
295 LDFLAGS="${LDFLAGS} $@" 638 export LDFLAGS="${LDFLAGS} $*"
296 return 0 639 return 0
297} 640}
298 641
299etexec-flags() { 642# @FUNCTION: filter-ldflags
300 has_version sys-devel/hardened-gcc 643# @USAGE: <flags>
301 if [ $? == 0 ] ; then 644# @DESCRIPTION:
302 if [ "`is-flag -yet_exec`" != "true" ]; then 645# Remove particular <flags> from LDFLAGS. Accepts shell globs.
303 debug-print ">>> appending flags -yet_exec" 646filter-ldflags() {
304 append-flags -yet_exec 647 _filter-var LDFLAGS "$@"
305 append-ldflags -yet_exec 648 return 0
306 fi 649}
650
651# @FUNCTION: raw-ldflags
652# @USAGE: [flags]
653# @DESCRIPTION:
654# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
655# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
656# to gcc where it needs the '-Wl,'.
657#
658# If no flags are specified, then default to ${LDFLAGS}.
659raw-ldflags() {
660 local x input="$@"
661 [[ -z ${input} ]] && input=${LDFLAGS}
662 set --
663 for x in ${input} ; do
664 x=${x#-Wl,}
665 set -- "$@" ${x//,/ }
666 done
667 echo "$@"
668}
669
670# @FUNCTION: no-as-needed
671# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
672no-as-needed() {
673 case $($(tc-getLD) -v 2>&1 </dev/null) in
674 *GNU*) # GNU ld
675 echo "-Wl,--no-as-needed" ;;
676 esac
677}
678
307 fi 679fi
308}
309
310fstack-flags() {
311 has_version sys-devel/hardened-gcc
312 if [ $? == 0 ] ; then
313 if [ "`is-flag -yno_propolice`" != "true" ]; then
314 debug-print ">>> appending flags -yno_propolice"
315 append-flags -yno_propolice
316 append-ldflags -yno_propolice
317 fi
318 fi
319}

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