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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 1.42 2004/04/06 03:45:00 tseng Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.163 2011/12/28 06:28:55 dirtyepic 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#### filter-ldflags <flags> ####
53# Remove particular flags from LDFLAGS
54# Matches only complete flags
55#
56#### etexec-flags ####
57# hooked function for hardened-gcc that appends
58# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
59# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
60#
61#### fstack-flags ####
62# hooked function for hardened-gcc that appends
63# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
64# and a package is filtering -fstack-protector, -fstack-protector-all
65#
66
67# 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
68setup-allowed-flags() { 34setup-allowed-flags() {
69 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
70 case "${ARCH}" in 73 case "${f}" in
71 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 74 # Ideally we should only concern ourselves with PIE flags,
72 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 75 # not -fPIC or -fpic, but too many places filter -fPIC without
73 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 76 # thinking about -fPIE.
74 ia64) ALLOWED_FLAGS="${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);;
75 esac 89 esac
76 90 done
77 # C[XX]FLAGS that we are think is ok, but needs testing
78 # NOTE: currently -Os have issues with gcc3 and K6* arch's
79 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
80 return 0
81} 91}
82 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}FLAGS. Accepts shell globs.
83filter-flags() { 117filter-flags() {
84 for x in "$@" ; do 118 _filter-hardened "$@"
85 case "${x}" in 119 _filter-var CFLAGS "$@"
86 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 120 _filter-var CPPFLAGS "$@"
87 -fstack-protector|-fstack-protector-all) fstack-flags;; 121 _filter-var CXXFLAGS "$@"
88 *) ;; 122 _filter-var FFLAGS "$@"
89 esac 123 _filter-var FCFLAGS "$@"
90 done
91
92 # we do this fancy spacing stuff so as to not filter
93 # out part of a flag ... we want flag atoms ! :D
94 CFLAGS=" ${CFLAGS} "
95 CXXFLAGS=" ${CXXFLAGS} "
96 for x in "$@" ; do
97 CFLAGS="${CFLAGS// ${x} / }"
98 CXXFLAGS="${CXXFLAGS// ${x} / }"
99 done
100 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
101 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
102 return 0 124 return 0
103} 125}
104 126
127# @FUNCTION: filter-lfs-flags
128# @DESCRIPTION:
129# Remove flags that enable Large File Support.
105filter-lfs-flags() { 130filter-lfs-flags() {
131 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
132 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
133 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
134 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
135 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
106 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 136 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
107} 137}
108 138
139# @FUNCTION: append-cppflags
140# @USAGE: <flags>
141# @DESCRIPTION:
142# Add extra <flags> to the current CPPFLAGS.
143append-cppflags() {
144 [[ $# -eq 0 ]] && return 0
145 export CPPFLAGS="${CPPFLAGS} $*"
146 return 0
147}
148
149# @FUNCTION: append-cflags
150# @USAGE: <flags>
151# @DESCRIPTION:
152# Add extra <flags> to the current CFLAGS.
153append-cflags() {
154 [[ $# -eq 0 ]] && return 0
155 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
156 return 0
157}
158
159# @FUNCTION: append-cxxflags
160# @USAGE: <flags>
161# @DESCRIPTION:
162# Add extra <flags> to the current CXXFLAGS.
163append-cxxflags() {
164 [[ $# -eq 0 ]] && return 0
165 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
166 return 0
167}
168
169# @FUNCTION: append-fflags
170# @USAGE: <flags>
171# @DESCRIPTION:
172# Add extra <flags> to the current {F,FC}FLAGS.
173append-fflags() {
174 [[ $# -eq 0 ]] && return 0
175 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
176 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
177 return 0
178}
179
180# @FUNCTION: append-lfs-flags
181# @DESCRIPTION:
182# Add flags that enable Large File Support.
183append-lfs-flags() {
184 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
185 # see comments in filter-lfs-flags func for meaning of these
186 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
187}
188
189# @FUNCTION: append-flags
190# @USAGE: <flags>
191# @DESCRIPTION:
192# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
109append-flags() { 193append-flags() {
110 export CFLAGS="${CFLAGS} $@" 194 [[ $# -eq 0 ]] && return 0
111 export CXXFLAGS="${CXXFLAGS} $@" 195 append-cflags "$@"
112 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags 196 append-cxxflags "$@"
197 append-fflags "$@"
113 return 0 198 return 0
114} 199}
115 200
201# @FUNCTION: replace-flags
202# @USAGE: <old> <new>
203# @DESCRIPTION:
204# Replace the <old> flag with <new>. Accepts shell globs for <old>.
116replace-flags() { 205replace-flags() {
117 # we do this fancy spacing stuff so as to not filter 206 [[ $# != 2 ]] \
118 # out part of a flag ... we want flag atoms ! :D 207 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
119 CFLAGS=" ${CFLAGS} " 208 && die "replace-flags takes 2 arguments, not $#"
120 CXXFLAGS=" ${CXXFLAGS} "
121 CFLAGS="${CFLAGS// ${1} / ${2} }"
122 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
123 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
124 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
125 return 0
126}
127 209
210 local f fset
211 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
212
213 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
214 # Looping over the flags instead of using a global
215 # substitution ensures that we're working with flag atoms.
216 # Otherwise globs like -O* have the potential to wipe out the
217 # list of flags.
218 for f in ${!fset}; do
219 # Note this should work with globs like -O*
220 [[ ${f} == ${1} ]] && f=${2}
221 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
222 done
223 eval export ${fset}=\${new_${fset}\[*]}
224 done
225
226 return 0
227}
228
229# @FUNCTION: replace-cpu-flags
230# @USAGE: <old> <new>
231# @DESCRIPTION:
232# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
233# with flags that select the <new> cpu. Accepts shell globs for <old>.
128replace-cpu-flags() { 234replace-cpu-flags() {
129 local newcpu="$1" ; shift 235 local newcpu="$#" ; newcpu="${!newcpu}"
130 local oldcpu="" 236 while [ $# -gt 1 ] ; do
131 for oldcpu in "$@" ; do 237 # quote to make sure that no globbing is done (particularly on
238 # ${oldcpu}) prior to calling replace-flags
132 replace-flags -march=${oldcpu} -march=${newcpu} 239 replace-flags "-march=${1}" "-march=${newcpu}"
133 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 240 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
134 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 241 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
242 shift
135 done 243 done
244 return 0
245}
246
247_is_flagq() {
248 local x
249 for x in ${!1} ; do
250 [[ ${x} == $2 ]] && return 0
251 done
136 return 0 252 return 1
137} 253}
138 254
255# @FUNCTION: is-flagq
256# @USAGE: <flag>
257# @DESCRIPTION:
258# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
259is-flagq() {
260 [[ -n $2 ]] && die "Usage: is-flag <flag>"
261 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
262}
263
264# @FUNCTION: is-flag
265# @USAGE: <flag>
266# @DESCRIPTION:
267# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
139is-flag() { 268is-flag() {
140 for x in ${CFLAGS} ${CXXFLAGS} ; do 269 is-flagq "$@" && echo true
141 if [ "${x}" == "$1" ] ; then
142 echo true
143 return 0
144 fi
145 done
146 return 1
147} 270}
148 271
272# @FUNCTION: is-ldflagq
273# @USAGE: <flag>
274# @DESCRIPTION:
275# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
276is-ldflagq() {
277 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
278 _is_flagq LDFLAGS $1
279}
280
281# @FUNCTION: is-ldflag
282# @USAGE: <flag>
283# @DESCRIPTION:
284# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
285is-ldflag() {
286 is-ldflagq "$@" && echo true
287}
288
289# @FUNCTION: filter-mfpmath
290# @USAGE: <math types>
291# @DESCRIPTION:
292# Remove specified math types from the fpmath flag. For example, if the user
293# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
294# -mfpmath=386.
149filter-mfpmath() { 295filter-mfpmath() {
296 local orig_mfpmath new_math prune_math
297
150 # save the original -mfpmath flag 298 # save the original -mfpmath flag
151 local orig_mfpmath="`get-flag -mfpmath`" 299 orig_mfpmath=$(get-flag -mfpmath)
152 # get the value of the current -mfpmath flag 300 # get the value of the current -mfpmath flag
153 local new_math=" `get-flag mfpmath | tr , ' '` " 301 new_math=$(get-flag mfpmath)
302 new_math=" ${new_math//,/ } "
154 # figure out which math values are to be removed 303 # figure out which math values are to be removed
155 local prune_math="" 304 prune_math=""
156 for prune_math in "$@" ; do 305 for prune_math in "$@" ; do
157 new_math="${new_math/ ${prune_math} / }" 306 new_math=${new_math/ ${prune_math} / }
158 done 307 done
159 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 308 new_math=$(echo ${new_math})
309 new_math=${new_math// /,}
160 310
161 if [ -z "${new_math}" ] ; then 311 if [[ -z ${new_math} ]] ; then
162 # if we're removing all user specified math values are 312 # if we're removing all user specified math values are
163 # slated for removal, then we just filter the flag 313 # slated for removal, then we just filter the flag
164 filter-flags ${orig_mfpmath} 314 filter-flags ${orig_mfpmath}
165 else 315 else
166 # if we only want to filter some of the user specified 316 # if we only want to filter some of the user specified
168 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 318 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
169 fi 319 fi
170 return 0 320 return 0
171} 321}
172 322
323# @FUNCTION: strip-flags
324# @DESCRIPTION:
325# Strip C[XX]FLAGS of everything except known good/safe flags.
173strip-flags() { 326strip-flags() {
327 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
328
174 setup-allowed-flags 329 setup-allowed-flags
175 330
176 local NEW_CFLAGS="" 331 local NEW_CFLAGS=""
177 local NEW_CXXFLAGS="" 332 local NEW_CXXFLAGS=""
333 local NEW_FFLAGS=""
334 local NEW_FCFLAGS=""
178 335
179 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 336 set -f # disable pathname expansion
180 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
181 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
182 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
183 fi
184 337
185 set -f
186
187 for x in ${CFLAGS} 338 for x in ${CFLAGS}; do
188 do
189 for y in ${ALLOWED_FLAGS} 339 for y in ${ALLOWED_FLAGS}; do
190 do
191 flag=${x%%=*} 340 flag=${x%%=*}
192 if [ "${flag%%${y}}" = "" ] 341 if [ "${flag%%${y}}" = "" ] ; then
193 then
194 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 342 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
195 break 343 break
196 fi 344 fi
197 done 345 done
198 done 346 done
199 347
200 for x in ${CXXFLAGS} 348 for x in ${CXXFLAGS}; do
201 do
202 for y in ${ALLOWED_FLAGS} 349 for y in ${ALLOWED_FLAGS}; do
203 do
204 flag=${x%%=*} 350 flag=${x%%=*}
205 if [ "${flag%%${y}}" = "" ] 351 if [ "${flag%%${y}}" = "" ] ; then
206 then
207 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 352 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
208 break 353 break
209 fi 354 fi
210 done 355 done
211 done 356 done
212 357
358 for x in ${FFLAGS}; do
359 for y in ${ALLOWED_FLAGS}; do
360 flag=${x%%=*}
361 if [ "${flag%%${y}}" = "" ] ; then
362 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
363 break
364 fi
365 done
366 done
367
368 for x in ${FCFLAGS}; do
369 for y in ${ALLOWED_FLAGS}; do
370 flag=${x%%=*}
371 if [ "${flag%%${y}}" = "" ] ; then
372 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
373 break
374 fi
375 done
376 done
377
213 # In case we filtered out all optimization flags fallback to -O2 378 # In case we filtered out all optimization flags fallback to -O2
214 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 379 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
215 NEW_CFLAGS="${NEW_CFLAGS} -O2" 380 NEW_CFLAGS="${NEW_CFLAGS} -O2"
216 fi 381 fi
217 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 382 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
218 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 383 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
219 fi 384 fi
385 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
386 NEW_FFLAGS="${NEW_FFLAGS} -O2"
387 fi
388 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
389 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
390 fi
220 391
221 set +f 392 set +f # re-enable pathname expansion
222
223 [ `use debug` ] \
224 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
225 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
226 393
227 export CFLAGS="${NEW_CFLAGS}" 394 export CFLAGS="${NEW_CFLAGS}"
228 export CXXFLAGS="${NEW_CXXFLAGS}" 395 export CXXFLAGS="${NEW_CXXFLAGS}"
396 export FFLAGS="${NEW_FFLAGS}"
397 export FCFLAGS="${NEW_FCFLAGS}"
229 return 0 398 return 0
230} 399}
231 400
232test_flag() { 401test-flag-PROG() {
233 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then 402 local comp=$1
234 echo "$@" 403 local flags="$2"
404
405 [[ -z ${comp} || -z ${flags} ]] && return 1
406
407 # use -c so we can test the assembler as well
408 local PROG=$(tc-get${comp})
409 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
410 > /dev/null 2>&1
411}
412
413# @FUNCTION: test-flag-CC
414# @USAGE: <flag>
415# @DESCRIPTION:
416# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
417test-flag-CC() { test-flag-PROG "CC" "$1"; }
418
419# @FUNCTION: test-flag-CXX
420# @USAGE: <flag>
421# @DESCRIPTION:
422# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
423test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
424
425# @FUNCTION: test-flag-F77
426# @USAGE: <flag>
427# @DESCRIPTION:
428# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
429test-flag-F77() { test-flag-PROG "F77" "$1"; }
430
431# @FUNCTION: test-flag-FC
432# @USAGE: <flag>
433# @DESCRIPTION:
434# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
435test-flag-FC() { test-flag-PROG "FC" "$1"; }
436
437test-flags-PROG() {
438 local comp=$1
439 local flags
440 local x
441
442 shift
443
444 [[ -z ${comp} ]] && return 1
445
446 for x in "$@" ; do
447 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
448 done
449
450 echo "${flags}"
451
452 # Just bail if we dont have any flags
453 [[ -n ${flags} ]]
454}
455
456# @FUNCTION: test-flags-CC
457# @USAGE: <flags>
458# @DESCRIPTION:
459# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
460test-flags-CC() { test-flags-PROG "CC" "$@"; }
461
462# @FUNCTION: test-flags-CXX
463# @USAGE: <flags>
464# @DESCRIPTION:
465# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
466test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
467
468# @FUNCTION: test-flags-F77
469# @USAGE: <flags>
470# @DESCRIPTION:
471# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
472test-flags-F77() { test-flags-PROG "F77" "$@"; }
473
474# @FUNCTION: test-flags-FC
475# @USAGE: <flags>
476# @DESCRIPTION:
477# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
478test-flags-FC() { test-flags-PROG "FC" "$@"; }
479
480# @FUNCTION: test-flags
481# @USAGE: <flags>
482# @DESCRIPTION:
483# Short-hand that should hopefully work for both C and C++ compiler, but
484# its really only present due to the append-flags() abomination.
485test-flags() { test-flags-CC "$@"; }
486
487# @FUNCTION: test_version_info
488# @USAGE: <version>
489# @DESCRIPTION:
490# Returns shell true if the current C compiler version matches <version>, else returns shell false.
491# Accepts shell globs.
492test_version_info() {
493 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
235 return 0 494 return 0
236 fi 495 else
237 return 1 496 return 1
497 fi
238} 498}
239 499
500# @FUNCTION: strip-unsupported-flags
501# @DESCRIPTION:
502# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
240strip-unsupported-flags() { 503strip-unsupported-flags() {
241 for x in ${CFLAGS} ; do 504 export CFLAGS=$(test-flags-CC ${CFLAGS})
242 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 505 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
243 done 506 export FFLAGS=$(test-flags-F77 ${FFLAGS})
244 for x in ${CXXFLAGS} ; do 507 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
245 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
246 done
247
248 export CFLAGS="${NEW_CFLAGS}"
249 export CXXFLAGS="${NEW_CXXFLAGS}"
250} 508}
251 509
510# @FUNCTION: get-flag
511# @USAGE: <flag>
512# @DESCRIPTION:
513# Find and echo the value for a particular flag. Accepts shell globs.
252get-flag() { 514get-flag() {
515 local f findflag="$1"
516
253 # this code looks a little flaky but seems to work for 517 # this code looks a little flaky but seems to work for
254 # everything we want ... 518 # everything we want ...
255 # for example, if CFLAGS="-march=i686": 519 # for example, if CFLAGS="-march=i686":
256 # `get-flags -march` == "-march=i686" 520 # `get-flag -march` == "-march=i686"
257 # `get-flags march` == "i686" 521 # `get-flag march` == "i686"
258 local findflag="$1"
259 for f in ${CFLAGS} ${CXXFLAGS} ; do 522 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
260 if [ "${f/${findflag}}" != "${f}" ] ; then 523 if [ "${f/${findflag}}" != "${f}" ] ; then
261 echo "${f/-${findflag}=}" 524 printf "%s\n" "${f/-${findflag}=}"
262 return 0 525 return 0
263 fi 526 fi
264 done 527 done
265 return 1 528 return 1
266} 529}
267 530
268has_pic() { 531# DEAD FUNCS. Remove by Dec 2011.
269 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 532test_flag() { die "$0: deprecated, please use test-flags()!" ; }
270 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 533has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
271 [ has_version sys-devel/hardened-gcc ] && return 0 534has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
272 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0 535has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
536has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
537has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
538
539# @FUNCTION: has_m64
540# @DESCRIPTION:
541# This doesn't test if the flag is accepted, it tests if the flag actually
542# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
543# return code is 0, else the return code is 1.
544has_m64() {
545 # this doesnt test if the flag is accepted, it tests if the flag
546 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
547 # please dont replace this function with test_flag in some future
548 # clean-up!
549
550 local temp="$(emktemp)"
551 echo "int main() { return(0); }" > "${temp}".c
552 MY_CC=$(tc-getCC)
553 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
554 local ret=$?
555 rm -f "${temp}".c
556 [[ ${ret} != 1 ]] && return 0
273 return 1 557 return 1
274} 558}
275 559
276has_pie() { 560# @FUNCTION: has_m32
277 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 561# @DESCRIPTION:
278 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 562# This doesn't test if the flag is accepted, it tests if the flag actually
279 [ has_version sys-devel/hardened-gcc ] && return 0 563# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
280 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0 564# code is 0, else return code is 1.
565has_m32() {
566 # this doesnt test if the flag is accepted, it tests if the flag
567 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
568 # please dont replace this function with test_flag in some future
569 # clean-up!
570
571 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
572
573 local temp=$(emktemp)
574 echo "int main() { return(0); }" > "${temp}".c
575 MY_CC=$(tc-getCC)
576 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
577 local ret=$?
578 rm -f "${temp}".c
579 [[ ${ret} != 1 ]] && return 0
281 return 1 580 return 1
282} 581}
283
284has_ssp() {
285 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
286 [ has_version sys-devel/hardened-gcc ] && return 0
287 [ ! -z "`${CC/ .*/} --version| grep ssp`" ] && return 0
288 return 1
289}
290 582
583# @FUNCTION: replace-sparc64-flags
584# @DESCRIPTION:
585# Sets mcpu to v8 and uses the original value as mtune if none specified.
291replace-sparc64-flags() { 586replace-sparc64-flags() {
292 local SPARC64_CPUS="ultrasparc v9" 587 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
293 588
294 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 589 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
295 then
296 for x in ${SPARC64_CPUS} 590 for x in ${SPARC64_CPUS}; do
297 do
298 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 591 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
299 done 592 done
300 else 593 else
301 for x in ${SPARC64_CPUS} 594 for x in ${SPARC64_CPUS}; do
302 do
303 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 595 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
304 done 596 done
305 fi 597 fi
306 598
307 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 599 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
308 then
309 for x in ${SPARC64_CPUS} 600 for x in ${SPARC64_CPUS}; do
310 do
311 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 601 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
312 done 602 done
313 else 603 else
314 for x in ${SPARC64_CPUS} 604 for x in ${SPARC64_CPUS}; do
315 do
316 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 605 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
317 done 606 done
318 fi 607 fi
319}
320 608
609 export CFLAGS CXXFLAGS
610}
611
612# @FUNCTION: append-libs
613# @USAGE: <libs>
614# @DESCRIPTION:
615# Add extra <libs> to the current LIBS.
616append-libs() {
617 [[ $# -eq 0 ]] && return 0
618 local flag
619 for flag in "$@"; do
620 [[ ${flag} == -l* ]] && flag=${flag#-l}
621 export LIBS="${LIBS} -l${flag}"
622 done
623
624 return 0
625}
626
627# @FUNCTION: append-ldflags
628# @USAGE: <flags>
629# @DESCRIPTION:
630# Add extra <flags> to the current LDFLAGS.
321append-ldflags() { 631append-ldflags() {
632 [[ $# -eq 0 ]] && return 0
633 local flag
634 for flag in "$@"; do
635 [[ ${flag} == -l* ]] && \
636 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
637 done
638
322 LDFLAGS="${LDFLAGS} $@" 639 export LDFLAGS="${LDFLAGS} $*"
323 return 0 640 return 0
324} 641}
325 642
643# @FUNCTION: filter-ldflags
644# @USAGE: <flags>
645# @DESCRIPTION:
646# Remove particular <flags> from LDFLAGS. Accepts shell globs.
326filter-ldflags() { 647filter-ldflags() {
327 # we do this fancy spacing stuff so as to not filter 648 _filter-var LDFLAGS "$@"
328 # out part of a flag ... we want flag atoms ! :D 649 return 0
329 LDFLAGS=" ${LDFLAGS} " 650}
651
652# @FUNCTION: raw-ldflags
653# @USAGE: [flags]
654# @DESCRIPTION:
655# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
656# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
657# to gcc where it needs the '-Wl,'.
658#
659# If no flags are specified, then default to ${LDFLAGS}.
660raw-ldflags() {
661 local x input="$@"
662 [[ -z ${input} ]] && input=${LDFLAGS}
663 set --
330 for x in "$@" ; do 664 for x in ${input} ; do
331 LDFLAGS="${LDFLAGS// ${x} / }" 665 x=${x#-Wl,}
666 set -- "$@" ${x//,/ }
332 done 667 done
333 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 668 echo "$@"
334 return 0
335} 669}
336 670
337etexec-flags() { 671# @FUNCTION: no-as-needed
338 has_pie || has_pic 672# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
339 if [ $? == 0 ] ; then 673no-as-needed() {
340 # strip -fPIC regardless if you've gotten this far 674 case $($(tc-getLD) -v 2>&1 </dev/null) in
341 strip-flags -fPIC -fpic -fPIE -fpie -pie 675 *GNU*) # GNU ld
342 if [ "`is-flag -yet_exec`" != "true" ]; then 676 echo "-Wl,--no-as-needed" ;;
343 # If our compile support -yet_exec, append it now 677 esac
344 [ -z "`gcc -yet_exec -S -o /dev/null -xc /dev/null 2>&1`" ] \ 678}
345 && ( debug-print ">>> appending flags -yet_exec" ; \ 679
346 append-flags -yet_exec ; append-ldflags -yet_exec )
347 fi
348 fi 680fi
349}
350
351fstack-flags() {
352 has_ssp
353 if [ $? == 0 ] ; then
354 # strip -fstack-protector regardless if you've gotten this far
355 strip-flags -fstack-protector -fstack-protector-all
356 if [ "`is-flag -yno_propolice`" != "true" ]; then
357 # If our compile support -yno_propolice, append it now
358 [ -z "`gcc -yno_propolice -S -o /dev/null -xc /dev/null 2>&1`" ] \
359 && ( debug-print ">>> appending flags -yno_propolice" ; \
360 append-flags -yno_propolice ; append-ldflags -yno_propolice )
361 fi
362 fi
363}

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