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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 1.56 2004/06/10 00:24:57 lv Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.157 2011/11/11 07:06:25 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
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 $ECLASS"
9IUSE="$IUSE debug"
10 28
11#
12#### filter-flags <flags> ####
13# Remove particular flags from C[XX]FLAGS
14# Matches only complete flags
15#
16#### append-flags <flags> ####
17# Add extra flags to your current C[XX]FLAGS
18#
19#### replace-flags <orig.flag> <new.flag> ###
20# Replace a flag by another one
21#
22#### replace-cpu-flags <new.cpu> <old.cpus> ###
23# Replace march/mcpu flags that specify <old.cpus>
24# with flags that specify <new.cpu>
25#
26#### is-flag <flag> ####
27# Returns "true" if flag is set in C[XX]FLAGS
28# Matches only complete a flag
29#
30#### strip-flags ####
31# Strip C[XX]FLAGS of everything except known
32# good options.
33#
34#### strip-unsupported-flags ####
35# Strip C[XX]FLAGS of any flags not supported by
36# installed version of gcc
37#
38#### get-flag <flag> ####
39# Find and echo the value for a particular flag
40#
41#### replace-sparc64-flags ####
42# Sets mcpu to v8 and uses the original value
43# as mtune if none specified.
44#
45#### filter-mfpmath <math types> ####
46# Remove specified math types from the fpmath specification
47# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
48# will leave the user with -mfpmath=386
49#
50#### append-ldflags ####
51# Add extra flags to your current LDFLAGS
52#
53#### filter-ldflags <flags> ####
54# Remove particular flags from LDFLAGS
55# Matches only complete flags
56#
57#### etexec-flags ####
58# hooked function for hardened gcc that appends
59# -fno-pic to {C,CXX,LD}FLAGS
60# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
61#
62#### fstack-flags ####
63# hooked function for hardened gcc that appends
64# -fno-stack-protector to {C,CXX,LD}FLAGS
65# when a package is filtering -fstack-protector, -fstack-protector-all
66# notice: modern automatic specs files will also suppress -fstack-protector-all
67# when only -fno-stack-protector is given
68#
69
70# 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
71setup-allowed-flags() { 31setup-allowed-flags() {
72 if [ -z "${ALLOWED_FLAGS}" ] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 33 export ALLOWED_FLAGS="-pipe"
34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
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="${ALLOWED_FLAGS} -fno-ident -fpermissive"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
41 fi
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*"
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
64 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
65 # NOTE: currently -Os have issues with gcc3 and K6* arch's
66 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
67 return 0
68}
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 "$@" ; do
74 case "${ARCH}" in 75 case "${f}" in
75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 76 # Ideally we should only concern ourselves with PIE flags,
76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 77 # not -fPIC or -fpic, but too many places filter -fPIC without
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 78 # thinking about -fPIE.
78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 79 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
79 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 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);;
80 esac 91 esac
81 fi 92 done
82
83 # C[XX]FLAGS that we are think is ok, but needs testing
84 # NOTE: currently -Os have issues with gcc3 and K6* arch's
85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
86 return 0
87} 93}
88 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.
89filter-flags() { 119filter-flags() {
90 for x in "$@" ; do 120 _filter-hardened "$@"
91 case "${x}" in 121 _filter-var CFLAGS "$@"
92 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 122 _filter-var CPPFLAGS "$@"
93 -fstack-protector|-fstack-protector-all) fstack-flags;; 123 _filter-var CXXFLAGS "$@"
94 *) ;; 124 _filter-var FFLAGS "$@"
95 esac 125 _filter-var FCFLAGS "$@"
96 done
97
98 # we do this fancy spacing stuff so as to not filter
99 # out part of a flag ... we want flag atoms ! :D
100 CFLAGS=" ${CFLAGS} "
101 CXXFLAGS=" ${CXXFLAGS} "
102 for x in "$@" ; do
103 CFLAGS="${CFLAGS// ${x} / }"
104 CXXFLAGS="${CXXFLAGS// ${x} / }"
105 done
106 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
107 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
108 return 0 126 return 0
109} 127}
110 128
129# @FUNCTION: filter-lfs-flags
130# @DESCRIPTION:
131# Remove flags that enable Large File Support.
111filter-lfs-flags() { 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)
112 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 138 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
113} 139}
114 140
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 $* ]] && return 0
157 export CFLAGS=$(test-flags-CC ${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 $* ]] && return 0
167 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} $*)
168 return 0
169}
170
171# @FUNCTION: append-fflags
172# @USAGE: <flags>
173# @DESCRIPTION:
174# Add extra <flags> to the current {F,FC}FLAGS.
175append-fflags() {
176 [[ -z $* ]] && return 0
177 export FFLAGS=$(test-flags-F77 ${FFLAGS} $*)
178 export FCFLAGS=$(test-flags-FC ${FCFLAGS} $*)
179 return 0
180}
181
182# @FUNCTION: append-lfs-flags
183# @DESCRIPTION:
184# Add flags that enable Large File Support.
115append-lfs-flags() { 185append-lfs-flags() {
186 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
187 # see comments in filter-lfs-flags func for meaning of these
116 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 188 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
117} 189}
118 190
191# @FUNCTION: append-flags
192# @USAGE: <flags>
193# @DESCRIPTION:
194# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
119append-flags() { 195append-flags() {
120 export CFLAGS="${CFLAGS} $@" 196 [[ -z $* ]] && return 0
121 export CXXFLAGS="${CXXFLAGS} $@" 197 append-cflags "$@"
122 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags 198 append-cxxflags "$@"
199 append-fflags "$@"
123 return 0 200 return 0
124} 201}
125 202
203# @FUNCTION: replace-flags
204# @USAGE: <old> <new>
205# @DESCRIPTION:
206# Replace the <old> flag with <new>. Accepts shell globs for <old>.
126replace-flags() { 207replace-flags() {
127 # we do this fancy spacing stuff so as to not filter 208 [[ $# != 2 ]] \
128 # out part of a flag ... we want flag atoms ! :D 209 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
129 CFLAGS=" ${CFLAGS} " 210 && die "replace-flags takes 2 arguments, not $#"
130 CXXFLAGS=" ${CXXFLAGS} "
131 CFLAGS="${CFLAGS// ${1} / ${2} }"
132 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
133 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
134 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
135 return 0
136}
137 211
212 local f fset
213 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
214
215 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
216 # Looping over the flags instead of using a global
217 # substitution ensures that we're working with flag atoms.
218 # Otherwise globs like -O* have the potential to wipe out the
219 # list of flags.
220 for f in ${!fset}; do
221 # Note this should work with globs like -O*
222 [[ ${f} == ${1} ]] && f=${2}
223 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
224 done
225 eval export ${fset}=\${new_${fset}\[*]}
226 done
227
228 return 0
229}
230
231# @FUNCTION: replace-cpu-flags
232# @USAGE: <old> <new>
233# @DESCRIPTION:
234# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
235# with flags that select the <new> cpu. Accepts shell globs for <old>.
138replace-cpu-flags() { 236replace-cpu-flags() {
139 local newcpu="$1" ; shift 237 local newcpu="$#" ; newcpu="${!newcpu}"
140 local oldcpu="" 238 while [ $# -gt 1 ] ; do
141 for oldcpu in "$@" ; do 239 # quote to make sure that no globbing is done (particularly on
240 # ${oldcpu}) prior to calling replace-flags
142 replace-flags -march=${oldcpu} -march=${newcpu} 241 replace-flags "-march=${1}" "-march=${newcpu}"
143 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 242 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
144 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 243 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
244 shift
145 done 245 done
246 return 0
247}
248
249_is_flagq() {
250 local x
251 for x in ${!1} ; do
252 [[ ${x} == $2 ]] && return 0
253 done
146 return 0 254 return 1
147} 255}
148 256
257# @FUNCTION: is-flagq
258# @USAGE: <flag>
259# @DESCRIPTION:
260# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
261is-flagq() {
262 [[ -n $2 ]] && die "Usage: is-flag <flag>"
263 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
264}
265
266# @FUNCTION: is-flag
267# @USAGE: <flag>
268# @DESCRIPTION:
269# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
149is-flag() { 270is-flag() {
150 for x in ${CFLAGS} ${CXXFLAGS} ; do 271 is-flagq "$@" && echo true
151 if [ "${x}" == "$1" ] ; then
152 echo true
153 return 0
154 fi
155 done
156 return 1
157} 272}
158 273
274# @FUNCTION: is-ldflagq
275# @USAGE: <flag>
276# @DESCRIPTION:
277# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
278is-ldflagq() {
279 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
280 _is_flagq LDFLAGS $1
281}
282
283# @FUNCTION: is-ldflag
284# @USAGE: <flag>
285# @DESCRIPTION:
286# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
287is-ldflag() {
288 is-ldflagq "$@" && echo true
289}
290
291# @FUNCTION: filter-mfpmath
292# @USAGE: <math types>
293# @DESCRIPTION:
294# Remove specified math types from the fpmath flag. For example, if the user
295# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
296# -mfpmath=386.
159filter-mfpmath() { 297filter-mfpmath() {
298 local orig_mfpmath new_math prune_math
299
160 # save the original -mfpmath flag 300 # save the original -mfpmath flag
161 local orig_mfpmath="`get-flag -mfpmath`" 301 orig_mfpmath=$(get-flag -mfpmath)
162 # get the value of the current -mfpmath flag 302 # get the value of the current -mfpmath flag
163 local new_math=" `get-flag mfpmath | tr , ' '` " 303 new_math=$(get-flag mfpmath)
304 new_math=" ${new_math//,/ } "
164 # figure out which math values are to be removed 305 # figure out which math values are to be removed
165 local prune_math="" 306 prune_math=""
166 for prune_math in "$@" ; do 307 for prune_math in "$@" ; do
167 new_math="${new_math/ ${prune_math} / }" 308 new_math=${new_math/ ${prune_math} / }
168 done 309 done
169 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 310 new_math=$(echo ${new_math})
311 new_math=${new_math// /,}
170 312
171 if [ -z "${new_math}" ] ; then 313 if [[ -z ${new_math} ]] ; then
172 # if we're removing all user specified math values are 314 # if we're removing all user specified math values are
173 # slated for removal, then we just filter the flag 315 # slated for removal, then we just filter the flag
174 filter-flags ${orig_mfpmath} 316 filter-flags ${orig_mfpmath}
175 else 317 else
176 # if we only want to filter some of the user specified 318 # if we only want to filter some of the user specified
178 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 320 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
179 fi 321 fi
180 return 0 322 return 0
181} 323}
182 324
325# @FUNCTION: strip-flags
326# @DESCRIPTION:
327# Strip C[XX]FLAGS of everything except known good/safe flags.
183strip-flags() { 328strip-flags() {
329 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
330
184 setup-allowed-flags 331 setup-allowed-flags
185 332
186 local NEW_CFLAGS="" 333 local NEW_CFLAGS=""
187 local NEW_CXXFLAGS="" 334 local NEW_CXXFLAGS=""
335 local NEW_FFLAGS=""
336 local NEW_FCFLAGS=""
188 337
189 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 338 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
190 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 339 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
191 use debug && einfo "Enabling the use of some unstable flags"
192 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 340 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
193 fi 341 fi
194 342
195 set -f 343 set -f # disable pathname expansion
196 344
197 for x in ${CFLAGS} 345 for x in ${CFLAGS}; do
198 do
199 for y in ${ALLOWED_FLAGS} 346 for y in ${ALLOWED_FLAGS}; do
200 do
201 flag=${x%%=*} 347 flag=${x%%=*}
202 if [ "${flag%%${y}}" = "" ] 348 if [ "${flag%%${y}}" = "" ] ; then
203 then
204 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 349 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
205 break 350 break
206 fi 351 fi
207 done 352 done
208 done 353 done
209 354
210 for x in ${CXXFLAGS} 355 for x in ${CXXFLAGS}; do
211 do
212 for y in ${ALLOWED_FLAGS} 356 for y in ${ALLOWED_FLAGS}; do
213 do
214 flag=${x%%=*} 357 flag=${x%%=*}
215 if [ "${flag%%${y}}" = "" ] 358 if [ "${flag%%${y}}" = "" ] ; then
216 then
217 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 359 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
218 break 360 break
219 fi 361 fi
220 done 362 done
221 done 363 done
222 364
365 for x in ${FFLAGS}; do
366 for y in ${ALLOWED_FLAGS}; do
367 flag=${x%%=*}
368 if [ "${flag%%${y}}" = "" ] ; then
369 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
370 break
371 fi
372 done
373 done
374
375 for x in ${FCFLAGS}; do
376 for y in ${ALLOWED_FLAGS}; do
377 flag=${x%%=*}
378 if [ "${flag%%${y}}" = "" ] ; then
379 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
380 break
381 fi
382 done
383 done
384
223 # In case we filtered out all optimization flags fallback to -O2 385 # In case we filtered out all optimization flags fallback to -O2
224 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 386 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
225 NEW_CFLAGS="${NEW_CFLAGS} -O2" 387 NEW_CFLAGS="${NEW_CFLAGS} -O2"
226 fi 388 fi
227 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 389 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
228 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 390 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
229 fi 391 fi
392 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
393 NEW_FFLAGS="${NEW_FFLAGS} -O2"
394 fi
395 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
396 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
397 fi
230 398
231 set +f 399 set +f # re-enable pathname expansion
232
233 use debug \
234 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
235 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
236 400
237 export CFLAGS="${NEW_CFLAGS}" 401 export CFLAGS="${NEW_CFLAGS}"
238 export CXXFLAGS="${NEW_CXXFLAGS}" 402 export CXXFLAGS="${NEW_CXXFLAGS}"
403 export FFLAGS="${NEW_FFLAGS}"
404 export FCFLAGS="${NEW_FCFLAGS}"
239 return 0 405 return 0
240} 406}
241 407
242test_flag() { 408test-flag-PROG() {
243 if [ -z "`gcc -S -xc "$@" -o /dev/null /dev/null 2>&1`" ]; then 409 local comp=$1
244 echo "$@" 410 local flags="$2"
411
412 [[ -z ${comp} || -z ${flags} ]] && return 1
413
414 # use -c so we can test the assembler as well
415 local PROG=$(tc-get${comp})
416 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
417 > /dev/null 2>&1
418}
419
420# @FUNCTION: test-flag-CC
421# @USAGE: <flag>
422# @DESCRIPTION:
423# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
424test-flag-CC() { test-flag-PROG "CC" "$1"; }
425
426# @FUNCTION: test-flag-CXX
427# @USAGE: <flag>
428# @DESCRIPTION:
429# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
430test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
431
432# @FUNCTION: test-flag-F77
433# @USAGE: <flag>
434# @DESCRIPTION:
435# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
436test-flag-F77() { test-flag-PROG "F77" "$1"; }
437
438# @FUNCTION: test-flag-FC
439# @USAGE: <flag>
440# @DESCRIPTION:
441# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
442test-flag-FC() { test-flag-PROG "FC" "$1"; }
443
444test-flags-PROG() {
445 local comp=$1
446 local flags
447 local x
448
449 shift
450
451 [[ -z ${comp} ]] && return 1
452
453 x=""
454 for x in "$@" ; do
455 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
456 done
457
458 echo "${flags}"
459
460 # Just bail if we dont have any flags
461 [[ -n ${flags} ]]
462}
463
464# @FUNCTION: test-flags-CC
465# @USAGE: <flags>
466# @DESCRIPTION:
467# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
468test-flags-CC() { test-flags-PROG "CC" "$@"; }
469
470# @FUNCTION: test-flags-CXX
471# @USAGE: <flags>
472# @DESCRIPTION:
473# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
474test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
475
476# @FUNCTION: test-flags-F77
477# @USAGE: <flags>
478# @DESCRIPTION:
479# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
480test-flags-F77() { test-flags-PROG "F77" "$@"; }
481
482# @FUNCTION: test-flags-FC
483# @USAGE: <flags>
484# @DESCRIPTION:
485# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
486test-flags-FC() { test-flags-PROG "FC" "$@"; }
487
488# @FUNCTION: test-flags
489# @USAGE: <flags>
490# @DESCRIPTION:
491# Short-hand that should hopefully work for both C and C++ compiler, but
492# its really only present due to the append-flags() abomination.
493test-flags() { test-flags-CC "$@"; }
494
495# @FUNCTION: test_version_info
496# @USAGE: <version>
497# @DESCRIPTION:
498# Returns shell true if the current C compiler version matches <version>, else returns shell false.
499# Accepts shell globs.
500test_version_info() {
501 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
245 return 0 502 return 0
246 fi 503 else
247 return 1 504 return 1
505 fi
248} 506}
249 507
508# @FUNCTION: strip-unsupported-flags
509# @DESCRIPTION:
510# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
250strip-unsupported-flags() { 511strip-unsupported-flags() {
251 for x in ${CFLAGS} ; do 512 export CFLAGS=$(test-flags-CC ${CFLAGS})
252 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 513 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
253 done 514 export FFLAGS=$(test-flags-F77 ${FFLAGS})
254 for x in ${CXXFLAGS} ; do 515 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
255 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
256 done
257
258 export CFLAGS="${NEW_CFLAGS}"
259 export CXXFLAGS="${NEW_CXXFLAGS}"
260} 516}
261 517
518# @FUNCTION: get-flag
519# @USAGE: <flag>
520# @DESCRIPTION:
521# Find and echo the value for a particular flag. Accepts shell globs.
262get-flag() { 522get-flag() {
523 local f findflag="$1"
524
263 # this code looks a little flaky but seems to work for 525 # this code looks a little flaky but seems to work for
264 # everything we want ... 526 # everything we want ...
265 # for example, if CFLAGS="-march=i686": 527 # for example, if CFLAGS="-march=i686":
266 # `get-flags -march` == "-march=i686" 528 # `get-flag -march` == "-march=i686"
267 # `get-flags march` == "i686" 529 # `get-flag march` == "i686"
268 local findflag="$1"
269 for f in ${CFLAGS} ${CXXFLAGS} ; do 530 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
270 if [ "${f/${findflag}}" != "${f}" ] ; then 531 if [ "${f/${findflag}}" != "${f}" ] ; then
271 echo "${f/-${findflag}=}" 532 printf "%s\n" "${f/-${findflag}=}"
272 return 0 533 return 0
273 fi 534 fi
274 done 535 done
275 return 1 536 return 1
276} 537}
277 538
278has_hardened() { 539# DEAD FUNCS. Remove by Dec 2011.
279 local cc=${CC:-gcc} 540test_flag() { die "$0: deprecated, please use test-flags()!" ; }
280 [[ $(${cc%% *} --version 2>&1) == *Hardened* ]] 541has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
281 return $? 542has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
282} 543has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
544has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
545has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
283 546
284has_pic() { 547# @FUNCTION: has_m64
285 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 548# @DESCRIPTION:
286 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 549# This doesn't test if the flag is accepted, it tests if the flag actually
287 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0 550# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
551# return code is 0, else the return code is 1.
552has_m64() {
553 # this doesnt test if the flag is accepted, it tests if the flag
554 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
555 # please dont replace this function with test_flag in some future
556 # clean-up!
557
558 local temp="$(emktemp)"
559 echo "int main() { return(0); }" > "${temp}".c
560 MY_CC=$(tc-getCC)
561 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
562 local ret=$?
563 rm -f "${temp}".c
564 [[ ${ret} != 1 ]] && return 0
288 return 1 565 return 1
289} 566}
290 567
291has_pie() { 568# @FUNCTION: has_m32
292 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 569# @DESCRIPTION:
293 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 570# This doesn't test if the flag is accepted, it tests if the flag actually
294 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0 571# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
572# code is 0, else return code is 1.
573has_m32() {
574 # this doesnt test if the flag is accepted, it tests if the flag
575 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
576 # please dont replace this function with test_flag in some future
577 # clean-up!
578
579 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
580
581 local temp=$(emktemp)
582 echo "int main() { return(0); }" > "${temp}".c
583 MY_CC=$(tc-getCC)
584 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
585 local ret=$?
586 rm -f "${temp}".c
587 [[ ${ret} != 1 ]] && return 0
295 return 1 588 return 1
296} 589}
297
298has_ssp() {
299 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
300 [ ! -z "`${CC/ .*/} --version| grep ssp`" ] && return 0
301 return 1
302}
303 590
304has_m64() { 591# @FUNCTION: replace-sparc64-flags
305 temp=`mktemp` 592# @DESCRIPTION:
306 echo "int main() { return(0); }" > ${temp}.c 593# Sets mcpu to v8 and uses the original value as mtune if none specified.
307 gcc -m64 -o /dev/null ${temp}.c > /dev/null 2>&1
308 ret=$?
309 rm -f ${temp}.c
310 [ "$ret" != "1" ] && return 0
311 return 1
312}
313
314has_m32() {
315 temp=`mktemp`
316 echo "int main() { return(0); }" > ${temp}.c
317 gcc -m32 -o /dev/null ${temp}.c > /dev/null 2>&1
318 ret=$?
319 rm -f ${temp}.c
320 [ "$ret" != "1" ] && return 0
321 return 1
322}
323
324replace-sparc64-flags() { 594replace-sparc64-flags() {
325 local SPARC64_CPUS="ultrasparc v9" 595 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
326 596
327 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 597 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
328 then
329 for x in ${SPARC64_CPUS} 598 for x in ${SPARC64_CPUS}; do
330 do
331 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 599 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
332 done 600 done
333 else 601 else
334 for x in ${SPARC64_CPUS} 602 for x in ${SPARC64_CPUS}; do
335 do
336 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 603 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
337 done 604 done
338 fi 605 fi
339 606
340 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 607 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
341 then
342 for x in ${SPARC64_CPUS} 608 for x in ${SPARC64_CPUS}; do
343 do
344 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 609 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
345 done 610 done
346 else 611 else
347 for x in ${SPARC64_CPUS} 612 for x in ${SPARC64_CPUS}; do
348 do
349 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 613 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
350 done 614 done
351 fi 615 fi
352}
353 616
617 export CFLAGS CXXFLAGS
618}
619
620# @FUNCTION: append-libs
621# @USAGE: <libs>
622# @DESCRIPTION:
623# Add extra <libs> to the current LIBS.
624append-libs() {
625 [[ -z $* ]] && return 0
626 local flag
627 for flag in "$@"; do
628 [[ ${flag} == -l* ]] && flag=${flag#-l}
629 export LIBS="${LIBS} -l${flag}"
630 done
631
632 return 0
633}
634
635# @FUNCTION: append-ldflags
636# @USAGE: <flags>
637# @DESCRIPTION:
638# Add extra <flags> to the current LDFLAGS.
354append-ldflags() { 639append-ldflags() {
640 [[ -z $* ]] && return 0
641 local flag
642 for flag in "$@"; do
643 [[ ${flag} == -l* ]] && \
644 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
645 done
646
355 LDFLAGS="${LDFLAGS} $@" 647 export LDFLAGS="${LDFLAGS} $*"
356 return 0 648 return 0
357} 649}
358 650
651# @FUNCTION: filter-ldflags
652# @USAGE: <flags>
653# @DESCRIPTION:
654# Remove particular <flags> from LDFLAGS. Accepts shell globs.
359filter-ldflags() { 655filter-ldflags() {
360 # we do this fancy spacing stuff so as to not filter 656 _filter-var LDFLAGS "$@"
361 # out part of a flag ... we want flag atoms ! :D 657 return 0
362 LDFLAGS=" ${LDFLAGS} " 658}
659
660# @FUNCTION: raw-ldflags
661# @USAGE: [flags]
662# @DESCRIPTION:
663# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
664# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
665# to gcc where it needs the '-Wl,'.
666#
667# If no flags are specified, then default to ${LDFLAGS}.
668raw-ldflags() {
669 local x input="$@"
670 [[ -z ${input} ]] && input=${LDFLAGS}
671 set --
363 for x in "$@" ; do 672 for x in ${input} ; do
364 LDFLAGS="${LDFLAGS// ${x} / }" 673 x=${x#-Wl,}
674 set -- "$@" ${x//,/ }
365 done 675 done
366 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 676 echo "$@"
367 return 0
368} 677}
369 678
370etexec-flags() { 679# @FUNCTION: no-as-needed
371 # if your not using a hardened compiler you wont need this 680# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
372 # PIC/no-pic kludge in the first place. 681no-as-needed() {
373 has_hardened || return 682 case $($(tc-getLD) -v 2>&1 </dev/null) in
374 683 *GNU*) # GNU ld
375 has_pie || has_pic 684 echo "-Wl,--no-as-needed" ;;
376 if [ $? == 0 ] ; then 685 esac
377 [ -z "`is-flag -fno-pic`" ] &&
378 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
379
380 [ -z "`is-flag -nopie`" ] &&
381 export CFLAGS="${CFLAGS} `test_flag -nopie`"
382 fi
383} 686}
384 687
385fstack-flags() { 688# Some tests for when we screw with things and want to make
386 has_ssp 689# sure we didn't break anything
387 if [ $? == 0 ] ; then 690#TESTS() {
388 [ -z "`is-flag -fno-stack-protector`" ] && 691# CFLAGS="-a -b -c=1"
389 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 692# CXXFLAGS="-x -y -z=2"
390 fi 693# LDFLAGS="-l -m -n=3"
391} 694#
392 695# die() { exit 1; }
696# (is-flag 1 2 3) && die
697# (is-ldflag 1 2 3) && die
698#
699# is-flagq -l && die
700# is-ldflagq -a && die
701# is-flagq -a || die
702# is-flagq -x || die
703# is-ldflagq -n=* || die
704# is-ldflagq -n && die
705#
706# strip-unsupported-flags
707# [[ ${CFLAGS} == "-c=1" ]] || die
708# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
709#
710# echo "All tests pass"
711#}
712#TESTS

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