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1# Copyright 1999-2003 Gentoo Technologies, Inc. 1# Copyright 1999-2009 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.37 2004/02/21 07:19:29 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.154 2011/08/17 17:59:35 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
13inherit eutils toolchain-funcs multilib
14
15################ DEPRECATED functions ################
16# The following are still present to avoid breaking existing
17# code more than necessary; however they are deprecated. Please
18# use gcc-specs-* from toolchain-funcs.eclass instead, if you
19# need to know which hardened techs are active in the compiler.
20# See bug #100974
4# 21#
5# Author Bart Verwilst <verwilst@gentoo.org> 22# has_hardened
23# has_pie
24# has_pic
25# has_ssp_all
26# has_ssp
6 27
7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS"
9 28
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 29# {C,CXX,F,FC}FLAGS that we allow in strip-flags
30# Note: shell globs and character lists are allowed
64setup-allowed-flags() { 31setup-allowed-flags() {
65 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
66 case "${ARCH}" in 33 export ALLOWED_FLAGS="-pipe"
67 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
68 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive"
69 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
70 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 41 fi
71 esac 42 # allow a bunch of flags that negate features / control ABI
43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
47 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
48 -mno-popcnt -mno-abm \
49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
51 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
54 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
56 -msecure-plt -m*-toc -D* -U*"
72 57
58 # 4.5
59 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60 # 4.6
61 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
62 -mno-bmi -mno-tbm"
63
73 # C[XX]FLAGS that we are think is ok, but needs testing 64 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
74 # NOTE: currently -Os have issues with gcc3 and K6* arch's 65 # NOTE: currently -Os have issues with gcc3 and K6* arch's
75 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 66 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
76 return 0 67 return 0
77} 68}
78 69
70# inverted filters for hardened compiler. This is trying to unpick
71# the hardened compiler defaults.
72_filter-hardened() {
73 local f
74 for f in "$@" ; do
75 case "${f}" in
76 # Ideally we should only concern ourselves with PIE flags,
77 # not -fPIC or -fpic, but too many places filter -fPIC without
78 # thinking about -fPIE.
79 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
80 gcc-specs-pie || continue
81 is-flagq -nopie || append-flags -nopie;;
82 -fstack-protector)
83 gcc-specs-ssp || continue
84 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
85 -fstack-protector-all)
86 gcc-specs-ssp-to-all || continue
87 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
88 -fno-strict-overflow)
89 gcc-specs-nostrict || continue
90 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
91 esac
92 done
93}
94
95# Remove occurrences of strings from variable given in $1
96# Strings removed are matched as globs, so for example
97# '-O*' would remove -O1, -O2 etc.
98_filter-var() {
99 local f x VAR VAL
100 declare -a new
101
102 VAR=$1
103 shift
104 eval VAL=\${${VAR}}
105 for f in ${VAL}; do
106 for x in "$@"; do
107 # Note this should work with globs like -O*
108 [[ ${f} == ${x} ]] && continue 2
109 done
110 eval new\[\${\#new\[@]}]=\${f}
111 done
112 eval export ${VAR}=\${new\[*]}
113}
114
115# @FUNCTION: filter-flags
116# @USAGE: <flags>
117# @DESCRIPTION:
118# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
79filter-flags() { 119filter-flags() {
80 for x in "$@" ; do 120 _filter-hardened "$@"
81 case "${x}" in 121 _filter-var CFLAGS "$@"
82 -fPIC|-fpic|-fPIE|-fpie) etexec-flags;; 122 _filter-var CPPFLAGS "$@"
83 -fstack-protector|-fstack-protector-all) fstack-flags;; 123 _filter-var CXXFLAGS "$@"
84 *) ;; 124 _filter-var FFLAGS "$@"
85 esac 125 _filter-var FCFLAGS "$@"
86 done 126 return 0
127}
87 128
88 # we do this fancy spacing stuff so as to not filter 129# @FUNCTION: filter-lfs-flags
89 # out part of a flag ... we want flag atoms ! :D 130# @DESCRIPTION:
131# Remove flags that enable Large File Support.
132filter-lfs-flags() {
133 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
134 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
135 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
136 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
137 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
138 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
139}
140
141# @FUNCTION: append-cppflags
142# @USAGE: <flags>
143# @DESCRIPTION:
144# Add extra <flags> to the current CPPFLAGS.
145append-cppflags() {
146 [[ -z $* ]] && return 0
147 export CPPFLAGS="${CPPFLAGS} $*"
148 return 0
149}
150
151# @FUNCTION: append-cflags
152# @USAGE: <flags>
153# @DESCRIPTION:
154# Add extra <flags> to the current CFLAGS.
155append-cflags() {
156 [[ -z $* ]] && return 0
90 CFLAGS=" ${CFLAGS} " 157 export CFLAGS="${CFLAGS} $*"
158 return 0
159}
160
161# @FUNCTION: append-cxxflags
162# @USAGE: <flags>
163# @DESCRIPTION:
164# Add extra <flags> to the current CXXFLAGS.
165append-cxxflags() {
166 [[ -z $* ]] && return 0
91 CXXFLAGS=" ${CXXFLAGS} " 167 export CXXFLAGS="${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 0 168 return 0
99} 169}
100 170
171# @FUNCTION: append-fflags
172# @USAGE: <flags>
173# @DESCRIPTION:
174# Add extra <flags> to the current {F,FC}FLAGS.
175append-fflags() {
176 [[ -z $* ]] && return 0
177 export FFLAGS="${FFLAGS} $*"
178 export FCFLAGS="${FCFLAGS} $*"
179 return 0
180}
181
182# @FUNCTION: append-lfs-flags
183# @DESCRIPTION:
184# Add flags that enable Large File Support.
185append-lfs-flags() {
186 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
187 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
188}
189
190# @FUNCTION: append-flags
191# @USAGE: <flags>
192# @DESCRIPTION:
193# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
101append-flags() { 194append-flags() {
102 export CFLAGS="${CFLAGS} $@" 195 [[ -z $* ]] && return 0
103 export CXXFLAGS="${CXXFLAGS} $@" 196 append-cflags "$@"
104 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags 197 append-cxxflags "$@"
198 append-fflags "$@"
105 return 0 199 return 0
106} 200}
107 201
202# @FUNCTION: replace-flags
203# @USAGE: <old> <new>
204# @DESCRIPTION:
205# Replace the <old> flag with <new>. Accepts shell globs for <old>.
108replace-flags() { 206replace-flags() {
109 # we do this fancy spacing stuff so as to not filter 207 [[ $# != 2 ]] \
110 # out part of a flag ... we want flag atoms ! :D 208 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
111 CFLAGS=" ${CFLAGS} " 209 && die "replace-flags takes 2 arguments, not $#"
112 CXXFLAGS=" ${CXXFLAGS} "
113 CFLAGS="${CFLAGS// ${1} / ${2} }"
114 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
115 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
116 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
117 return 0
118}
119 210
211 local f fset
212 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
213
214 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
215 # Looping over the flags instead of using a global
216 # substitution ensures that we're working with flag atoms.
217 # Otherwise globs like -O* have the potential to wipe out the
218 # list of flags.
219 for f in ${!fset}; do
220 # Note this should work with globs like -O*
221 [[ ${f} == ${1} ]] && f=${2}
222 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
223 done
224 eval export ${fset}=\${new_${fset}\[*]}
225 done
226
227 return 0
228}
229
230# @FUNCTION: replace-cpu-flags
231# @USAGE: <old> <new>
232# @DESCRIPTION:
233# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
234# with flags that select the <new> cpu. Accepts shell globs for <old>.
120replace-cpu-flags() { 235replace-cpu-flags() {
121 local newcpu="$1" ; shift 236 local newcpu="$#" ; newcpu="${!newcpu}"
122 local oldcpu="" 237 while [ $# -gt 1 ] ; do
123 for oldcpu in "$@" ; do 238 # quote to make sure that no globbing is done (particularly on
239 # ${oldcpu}) prior to calling replace-flags
124 replace-flags -march=${oldcpu} -march=${newcpu} 240 replace-flags "-march=${1}" "-march=${newcpu}"
125 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 241 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
242 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
243 shift
126 done 244 done
245 return 0
246}
247
248_is_flagq() {
249 local x
250 for x in ${!1} ; do
251 [[ ${x} == $2 ]] && return 0
252 done
127 return 0 253 return 1
128} 254}
129 255
256# @FUNCTION: is-flagq
257# @USAGE: <flag>
258# @DESCRIPTION:
259# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
260is-flagq() {
261 [[ -n $2 ]] && die "Usage: is-flag <flag>"
262 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
263}
264
265# @FUNCTION: is-flag
266# @USAGE: <flag>
267# @DESCRIPTION:
268# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
130is-flag() { 269is-flag() {
131 for x in ${CFLAGS} ${CXXFLAGS} ; do 270 is-flagq "$@" && echo true
132 if [ "${x}" == "$1" ] ; then
133 echo true
134 return 0
135 fi
136 done
137 return 1
138} 271}
139 272
273# @FUNCTION: is-ldflagq
274# @USAGE: <flag>
275# @DESCRIPTION:
276# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
277is-ldflagq() {
278 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
279 _is_flagq LDFLAGS $1
280}
281
282# @FUNCTION: is-ldflag
283# @USAGE: <flag>
284# @DESCRIPTION:
285# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
286is-ldflag() {
287 is-ldflagq "$@" && echo true
288}
289
290# @FUNCTION: filter-mfpmath
291# @USAGE: <math types>
292# @DESCRIPTION:
293# Remove specified math types from the fpmath flag. For example, if the user
294# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
295# -mfpmath=386.
140filter-mfpmath() { 296filter-mfpmath() {
297 local orig_mfpmath new_math prune_math
298
141 # save the original -mfpmath flag 299 # save the original -mfpmath flag
142 local orig_mfpmath="`get-flag -mfpmath`" 300 orig_mfpmath=$(get-flag -mfpmath)
143 # get the value of the current -mfpmath flag 301 # get the value of the current -mfpmath flag
144 local new_math=" `get-flag mfpmath | tr , ' '` " 302 new_math=$(get-flag mfpmath)
303 new_math=" ${new_math//,/ } "
145 # figure out which math values are to be removed 304 # figure out which math values are to be removed
146 local prune_math="" 305 prune_math=""
147 for prune_math in "$@" ; do 306 for prune_math in "$@" ; do
148 new_math="${new_math/ ${prune_math} / }" 307 new_math=${new_math/ ${prune_math} / }
149 done 308 done
150 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 309 new_math=$(echo ${new_math})
310 new_math=${new_math// /,}
151 311
152 if [ -z "${new_math}" ] ; then 312 if [[ -z ${new_math} ]] ; then
153 # if we're removing all user specified math values are 313 # if we're removing all user specified math values are
154 # slated for removal, then we just filter the flag 314 # slated for removal, then we just filter the flag
155 filter-flags ${orig_mfpmath} 315 filter-flags ${orig_mfpmath}
156 else 316 else
157 # if we only want to filter some of the user specified 317 # if we only want to filter some of the user specified
159 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 319 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
160 fi 320 fi
161 return 0 321 return 0
162} 322}
163 323
324# @FUNCTION: strip-flags
325# @DESCRIPTION:
326# Strip C[XX]FLAGS of everything except known good/safe flags.
164strip-flags() { 327strip-flags() {
328 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
329
165 setup-allowed-flags 330 setup-allowed-flags
166 331
167 local NEW_CFLAGS="" 332 local NEW_CFLAGS=""
168 local NEW_CXXFLAGS="" 333 local NEW_CXXFLAGS=""
334 local NEW_FFLAGS=""
335 local NEW_FCFLAGS=""
169 336
170 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 337 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
171 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 338 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
172 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
173 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 339 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
174 fi 340 fi
175 341
176 set -f 342 set -f # disable pathname expansion
177 343
178 for x in ${CFLAGS} 344 for x in ${CFLAGS}; do
179 do
180 for y in ${ALLOWED_FLAGS} 345 for y in ${ALLOWED_FLAGS}; do
181 do
182 flag=${x%%=*} 346 flag=${x%%=*}
183 if [ "${flag%%${y}}" = "" ] 347 if [ "${flag%%${y}}" = "" ] ; then
184 then
185 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 348 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
186 break 349 break
187 fi 350 fi
188 done 351 done
189 done 352 done
190 353
191 for x in ${CXXFLAGS} 354 for x in ${CXXFLAGS}; do
192 do
193 for y in ${ALLOWED_FLAGS} 355 for y in ${ALLOWED_FLAGS}; do
194 do
195 flag=${x%%=*} 356 flag=${x%%=*}
196 if [ "${flag%%${y}}" = "" ] 357 if [ "${flag%%${y}}" = "" ] ; then
197 then
198 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 358 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
199 break 359 break
200 fi 360 fi
201 done 361 done
202 done 362 done
203 363
364 for x in ${FFLAGS}; do
365 for y in ${ALLOWED_FLAGS}; do
366 flag=${x%%=*}
367 if [ "${flag%%${y}}" = "" ] ; then
368 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
369 break
370 fi
371 done
372 done
373
374 for x in ${FCFLAGS}; do
375 for y in ${ALLOWED_FLAGS}; do
376 flag=${x%%=*}
377 if [ "${flag%%${y}}" = "" ] ; then
378 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
379 break
380 fi
381 done
382 done
383
204 # In case we filtered out all optimization flags fallback to -O2 384 # In case we filtered out all optimization flags fallback to -O2
205 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 385 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
206 NEW_CFLAGS="${NEW_CFLAGS} -O2" 386 NEW_CFLAGS="${NEW_CFLAGS} -O2"
207 fi 387 fi
208 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 388 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
209 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 389 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
210 fi 390 fi
391 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
392 NEW_FFLAGS="${NEW_FFLAGS} -O2"
393 fi
394 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
395 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
396 fi
211 397
212 set +f 398 set +f # re-enable pathname expansion
213
214 [ `use debug` ] \
215 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
216 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
217 399
218 export CFLAGS="${NEW_CFLAGS}" 400 export CFLAGS="${NEW_CFLAGS}"
219 export CXXFLAGS="${NEW_CXXFLAGS}" 401 export CXXFLAGS="${NEW_CXXFLAGS}"
402 export FFLAGS="${NEW_FFLAGS}"
403 export FCFLAGS="${NEW_FCFLAGS}"
220 return 0 404 return 0
221} 405}
222 406
223test_flag() { 407test-flag-PROG() {
224 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then 408 local comp=$1
225 echo "$@" 409 local flags="$2"
410
411 [[ -z ${comp} || -z ${flags} ]] && return 1
412
413 # use -c so we can test the assembler as well
414 local PROG=$(tc-get${comp})
415 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
416 > /dev/null 2>&1
417}
418
419# @FUNCTION: test-flag-CC
420# @USAGE: <flag>
421# @DESCRIPTION:
422# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
423test-flag-CC() { test-flag-PROG "CC" "$1"; }
424
425# @FUNCTION: test-flag-CXX
426# @USAGE: <flag>
427# @DESCRIPTION:
428# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
429test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
430
431# @FUNCTION: test-flag-F77
432# @USAGE: <flag>
433# @DESCRIPTION:
434# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
435test-flag-F77() { test-flag-PROG "F77" "$1"; }
436
437# @FUNCTION: test-flag-FC
438# @USAGE: <flag>
439# @DESCRIPTION:
440# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
441test-flag-FC() { test-flag-PROG "FC" "$1"; }
442
443test-flags-PROG() {
444 local comp=$1
445 local flags
446 local x
447
448 shift
449
450 [[ -z ${comp} ]] && return 1
451
452 x=""
453 for x in "$@" ; do
454 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
455 done
456
457 echo "${flags}"
458
459 # Just bail if we dont have any flags
460 [[ -n ${flags} ]]
461}
462
463# @FUNCTION: test-flags-CC
464# @USAGE: <flags>
465# @DESCRIPTION:
466# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
467test-flags-CC() { test-flags-PROG "CC" "$@"; }
468
469# @FUNCTION: test-flags-CXX
470# @USAGE: <flags>
471# @DESCRIPTION:
472# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
473test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
474
475# @FUNCTION: test-flags-F77
476# @USAGE: <flags>
477# @DESCRIPTION:
478# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
479test-flags-F77() { test-flags-PROG "F77" "$@"; }
480
481# @FUNCTION: test-flags-FC
482# @USAGE: <flags>
483# @DESCRIPTION:
484# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
485test-flags-FC() { test-flags-PROG "FC" "$@"; }
486
487# @FUNCTION: test-flags
488# @USAGE: <flags>
489# @DESCRIPTION:
490# Short-hand that should hopefully work for both C and C++ compiler, but
491# its really only present due to the append-flags() abomination.
492test-flags() { test-flags-CC "$@"; }
493
494# @FUNCTION: test_version_info
495# @USAGE: <version>
496# @DESCRIPTION:
497# Returns shell true if the current C compiler version matches <version>, else returns shell false.
498# Accepts shell globs.
499test_version_info() {
500 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
226 return 0 501 return 0
227 fi 502 else
228 return 1 503 return 1
504 fi
229} 505}
230 506
507# @FUNCTION: strip-unsupported-flags
508# @DESCRIPTION:
509# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
231strip-unsupported-flags() { 510strip-unsupported-flags() {
232 for x in ${CFLAGS} ; do 511 export CFLAGS=$(test-flags-CC ${CFLAGS})
233 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 512 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
234 done 513 export FFLAGS=$(test-flags-F77 ${FFLAGS})
235 for x in ${CXXFLAGS} ; do 514 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
236 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
237 done
238
239 export CFLAGS="${NEW_CFLAGS}"
240 export CXXFLAGS="${NEW_CXXFLAGS}"
241} 515}
242 516
517# @FUNCTION: get-flag
518# @USAGE: <flag>
519# @DESCRIPTION:
520# Find and echo the value for a particular flag. Accepts shell globs.
243get-flag() { 521get-flag() {
522 local f findflag="$1"
523
244 # this code looks a little flaky but seems to work for 524 # this code looks a little flaky but seems to work for
245 # everything we want ... 525 # everything we want ...
246 # for example, if CFLAGS="-march=i686": 526 # for example, if CFLAGS="-march=i686":
247 # `get-flags -march` == "-march=i686" 527 # `get-flag -march` == "-march=i686"
248 # `get-flags march` == "i686" 528 # `get-flag march` == "i686"
249 local findflag="$1"
250 for f in ${CFLAGS} ${CXXFLAGS} ; do 529 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
251 if [ "${f/${findflag}}" != "${f}" ] ; then 530 if [ "${f/${findflag}}" != "${f}" ] ; then
252 echo "${f/-${findflag}=}" 531 printf "%s\n" "${f/-${findflag}=}"
253 return 0 532 return 0
254 fi 533 fi
255 done 534 done
256 return 1 535 return 1
257} 536}
258 537
538# DEAD FUNCS. Remove by Dec 2011.
539test_flag() { die "$0: deprecated, please use test-flags()!" ; }
540has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
541has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
542has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
543has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
544has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
545
546# @FUNCTION: has_m64
547# @DESCRIPTION:
548# This doesn't test if the flag is accepted, it tests if the flag actually
549# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
550# return code is 0, else the return code is 1.
551has_m64() {
552 # this doesnt test if the flag is accepted, it tests if the flag
553 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
554 # please dont replace this function with test_flag in some future
555 # clean-up!
556
557 local temp="$(emktemp)"
558 echo "int main() { return(0); }" > "${temp}".c
559 MY_CC=$(tc-getCC)
560 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
561 local ret=$?
562 rm -f "${temp}".c
563 [[ ${ret} != 1 ]] && return 0
564 return 1
565}
566
567# @FUNCTION: has_m32
568# @DESCRIPTION:
569# This doesn't test if the flag is accepted, it tests if the flag actually
570# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
571# code is 0, else return code is 1.
572has_m32() {
573 # this doesnt test if the flag is accepted, it tests if the flag
574 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
575 # please dont replace this function with test_flag in some future
576 # clean-up!
577
578 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
579
580 local temp=$(emktemp)
581 echo "int main() { return(0); }" > "${temp}".c
582 MY_CC=$(tc-getCC)
583 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
584 local ret=$?
585 rm -f "${temp}".c
586 [[ ${ret} != 1 ]] && return 0
587 return 1
588}
589
590# @FUNCTION: replace-sparc64-flags
591# @DESCRIPTION:
592# Sets mcpu to v8 and uses the original value as mtune if none specified.
259replace-sparc64-flags() { 593replace-sparc64-flags() {
260 local SPARC64_CPUS="ultrasparc v9" 594 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
261 595
262 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 596 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
263 then
264 for x in ${SPARC64_CPUS} 597 for x in ${SPARC64_CPUS}; do
265 do
266 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 598 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
267 done 599 done
268 else 600 else
269 for x in ${SPARC64_CPUS} 601 for x in ${SPARC64_CPUS}; do
270 do
271 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 602 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
272 done 603 done
273 fi 604 fi
274 605
275 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 606 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
276 then
277 for x in ${SPARC64_CPUS} 607 for x in ${SPARC64_CPUS}; do
278 do
279 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 608 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
280 done 609 done
281 else 610 else
282 for x in ${SPARC64_CPUS} 611 for x in ${SPARC64_CPUS}; do
283 do
284 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 612 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
285 done 613 done
286 fi 614 fi
287}
288 615
616 export CFLAGS CXXFLAGS
617}
618
619# @FUNCTION: append-libs
620# @USAGE: <libs>
621# @DESCRIPTION:
622# Add extra <libs> to the current LIBS.
623append-libs() {
624 [[ -z $* ]] && return 0
625 local flag
626 for flag in "$@"; do
627 [[ ${flag} == -l* ]] && flag=${flag#-l}
628 export LIBS="${LIBS} -l${flag}"
629 done
630
631 return 0
632}
633
634# @FUNCTION: append-ldflags
635# @USAGE: <flags>
636# @DESCRIPTION:
637# Add extra <flags> to the current LDFLAGS.
289append-ldflags() { 638append-ldflags() {
639 [[ -z $* ]] && return 0
640 local flag
641 for flag in "$@"; do
642 [[ ${flag} == -l* ]] && \
643 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
644 done
645
290 LDFLAGS="${LDFLAGS} $@" 646 export LDFLAGS="${LDFLAGS} $*"
291 return 0 647 return 0
292} 648}
293 649
294etexec-flags() { 650# @FUNCTION: filter-ldflags
295 has_version sys-devel/hardened-gcc 651# @USAGE: <flags>
296 if [ $? == 0 ] ; then 652# @DESCRIPTION:
297 if [ "`is-flag -yet_exec`" != "true" ]; then 653# Remove particular <flags> from LDFLAGS. Accepts shell globs.
298 debug-print ">>> appending flags -yet_exec" 654filter-ldflags() {
299 append-flags -yet_exec 655 _filter-var LDFLAGS "$@"
300 append-ldflags -yet_exec 656 return 0
301 fi
302 fi
303} 657}
304 658
305fstack-flags() { 659# @FUNCTION: raw-ldflags
306 has_version sys-devel/hardened-gcc 660# @USAGE: <flags>
307 if [ $? == 0 ] ; then 661# @DESCRIPTION:
308 if [ "`is-flag -yno_propolice`" != "true" ]; then 662# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
309 debug-print ">>> appending flags -yno_propolice" 663# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
310 append-flags -yno_propolice 664# to gcc where it needs the '-Wl,'.
311 append-ldflags -yno_propolice 665raw-ldflags() {
312 fi 666 local x input="$@"
313 fi 667 [[ -z ${input} ]] && input=${LDFLAGS}
668 set --
669 for x in ${input} ; do
670 x=${x#-Wl,}
671 set -- "$@" ${x//,/ }
672 done
673 echo "$@"
314} 674}
675
676# @FUNCTION: no-as-needed
677# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
678no-as-needed() {
679 case $($(tc-getLD) -v 2>&1 </dev/null) in
680 *GNU*) # GNU ld
681 echo "-Wl,--no-as-needed" ;;
682 esac
683}
684
685# Some tests for when we screw with things and want to make
686# sure we didn't break anything
687#TESTS() {
688# CFLAGS="-a -b -c=1"
689# CXXFLAGS="-x -y -z=2"
690# LDFLAGS="-l -m -n=3"
691#
692# die() { exit 1; }
693# (is-flag 1 2 3) && die
694# (is-ldflag 1 2 3) && die
695#
696# is-flagq -l && die
697# is-ldflagq -a && die
698# is-flagq -a || die
699# is-flagq -x || die
700# is-ldflagq -n=* || die
701# is-ldflagq -n && die
702#
703# strip-unsupported-flags
704# [[ ${CFLAGS} == "-c=1" ]] || die
705# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
706#
707# echo "All tests pass"
708#}
709#TESTS

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