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1# Copyright 1999-2004 Gentoo Foundation 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 1.79 2004/12/25 18:45:56 chriswhite Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.149 2011/02/01 05:41:30 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"
9 28
10IUSE="debug"
11
12# need access to emktemp()
13inherit eutils toolchain-funcs
14
15#
16#### filter-flags <flags> ####
17# Remove particular flags from C[XX]FLAGS
18# Matches only complete flags
19#
20#### append-flags <flags> ####
21# Add extra flags to your current C[XX]FLAGS
22#
23#### replace-flags <orig.flag> <new.flag> ###
24# Replace a flag by another one
25#
26#### replace-cpu-flags <old.cpus> <new.cpu> ###
27# Replace march/mcpu flags that specify <old.cpus>
28# with flags that specify <new.cpu>
29#
30#### is-flag <flag> ####
31# Returns "true" if flag is set in C[XX]FLAGS
32# Matches only complete a flag
33#
34#### strip-flags ####
35# Strip C[XX]FLAGS of everything except known
36# good options.
37#
38#### strip-unsupported-flags ####
39# Strip C[XX]FLAGS of any flags not supported by
40# installed version of gcc
41#
42#### get-flag <flag> ####
43# Find and echo the value for a particular flag
44#
45#### replace-sparc64-flags ####
46# Sets mcpu to v8 and uses the original value
47# as mtune if none specified.
48#
49#### filter-mfpmath <math types> ####
50# Remove specified math types from the fpmath specification
51# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
52# will leave the user with -mfpmath=386
53#
54#### append-ldflags ####
55# Add extra flags to your current LDFLAGS
56#
57#### filter-ldflags <flags> ####
58# Remove particular flags from LDFLAGS
59# Matches only complete flags
60#
61#### etexec-flags ####
62# hooked function for hardened gcc that appends
63# -fno-pic to {C,CXX,LD}FLAGS
64# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
65#
66#### fstack-flags ####
67# hooked function for hardened gcc that appends
68# -fno-stack-protector to {C,CXX,LD}FLAGS
69# when a package is filtering -fstack-protector, -fstack-protector-all
70# notice: modern automatic specs files will also suppress -fstack-protector-all
71# when only -fno-stack-protector is given
72#
73
74# 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
75setup-allowed-flags() { 31setup-allowed-flags() {
76 if [ -z "${ALLOWED_FLAGS}" ] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
77 export ALLOWED_FLAGS="-pipe" 33 export ALLOWED_FLAGS="-pipe"
78 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
79 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector" 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
40 export ALLOWED_FLAGS="${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 "$@" ; do
82 case "${ARCH}" in 75 case "${f}" in
83 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;; 76 # Ideally we should only concern ourselves with PIE flags,
84 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 77 # not -fPIC or -fpic, but too many places filter -fPIC without
85 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 78 # thinking about -fPIE.
86 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 79 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
87 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 80 gcc-specs-pie || continue
88 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;; 81 is-flagq -nopie || append-flags -nopie;;
89 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;; 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 $(test-flags -fstrict-overflow);;
90 esac 91 esac
91 fi 92 done
92 # allow a bunch of flags that negate features / control ABI
93 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
94 case "${ARCH}" in
95 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
96 esac
97 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias"
98
99 # C[XX]FLAGS that we are think is ok, but needs testing
100 # NOTE: currently -Os have issues with gcc3 and K6* arch's
101 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
102 return 0
103} 93}
104 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.
105filter-flags() { 119filter-flags() {
106 local x f fset 120 _filter-hardened "$@"
107 declare -a new_CFLAGS new_CXXFLAGS 121 _filter-var CFLAGS "$@"
108 122 _filter-var CPPFLAGS "$@"
109 for x in "$@" ; do 123 _filter-var CXXFLAGS "$@"
110 case "${x}" in 124 _filter-var FFLAGS "$@"
111 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 125 _filter-var FCFLAGS "$@"
112 -fstack-protector|-fstack-protector-all) fstack-flags;;
113 esac
114 done
115
116 for fset in CFLAGS CXXFLAGS; do
117 # Looping over the flags instead of using a global
118 # substitution ensures that we're working with flag atoms.
119 # Otherwise globs like -O* have the potential to wipe out the
120 # list of flags.
121 for f in ${!fset}; do
122 for x in "$@"; do
123 # Note this should work with globs like -O*
124 [[ ${f} == ${x} ]] && continue 2
125 done
126 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
127 done
128 eval export ${fset}=\${new_${fset}\[*]}
129 done
130
131 return 0 126 return 0
132} 127}
133 128
129# @FUNCTION: filter-lfs-flags
130# @DESCRIPTION:
131# Remove flags that enable Large File Support.
134filter-lfs-flags() { 132filter-lfs-flags() {
133 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
135 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 134 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136} 135}
137 136
137# @FUNCTION: append-cppflags
138# @USAGE: <flags>
139# @DESCRIPTION:
140# Add extra <flags> to the current CPPFLAGS.
141append-cppflags() {
142 [[ -z $* ]] && return 0
143 export CPPFLAGS="${CPPFLAGS} $*"
144 return 0
145}
146
147# @FUNCTION: append-cflags
148# @USAGE: <flags>
149# @DESCRIPTION:
150# Add extra <flags> to the current CFLAGS.
151append-cflags() {
152 [[ -z $* ]] && return 0
153 export CFLAGS="${CFLAGS} $*"
154 return 0
155}
156
157# @FUNCTION: append-cxxflags
158# @USAGE: <flags>
159# @DESCRIPTION:
160# Add extra <flags> to the current CXXFLAGS.
161append-cxxflags() {
162 [[ -z $* ]] && return 0
163 export CXXFLAGS="${CXXFLAGS} $*"
164 return 0
165}
166
167# @FUNCTION: append-fflags
168# @USAGE: <flags>
169# @DESCRIPTION:
170# Add extra <flags> to the current {F,FC}FLAGS.
171append-fflags() {
172 [[ -z $* ]] && return 0
173 export FFLAGS="${FFLAGS} $*"
174 export FCFLAGS="${FCFLAGS} $*"
175 return 0
176}
177
178# @FUNCTION: append-lfs-flags
179# @DESCRIPTION:
180# Add flags that enable Large File Support.
138append-lfs-flags() { 181append-lfs-flags() {
182 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
139 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 183 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
140} 184}
141 185
186# @FUNCTION: append-flags
187# @USAGE: <flags>
188# @DESCRIPTION:
189# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
142append-flags() { 190append-flags() {
143 export CFLAGS="${CFLAGS} $*" 191 [[ -z $* ]] && return 0
144 export CXXFLAGS="${CXXFLAGS} $*" 192 append-cflags "$@"
145 [ -n "`is-flag -fno-stack-protector`" -o \ 193 append-cxxflags "$@"
146 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 194 append-fflags "$@"
147 return 0 195 return 0
148} 196}
149 197
198# @FUNCTION: replace-flags
199# @USAGE: <old> <new>
200# @DESCRIPTION:
201# Replace the <old> flag with <new>. Accepts shell globs for <old>.
150replace-flags() { 202replace-flags() {
203 [[ $# != 2 ]] \
204 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
205 && die "replace-flags takes 2 arguments, not $#"
206
151 local f fset 207 local f fset
152 declare -a new_CFLAGS new_CXXFLAGS 208 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
153 209
154 for fset in CFLAGS CXXFLAGS; do 210 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
155 # Looping over the flags instead of using a global 211 # Looping over the flags instead of using a global
156 # substitution ensures that we're working with flag atoms. 212 # substitution ensures that we're working with flag atoms.
157 # Otherwise globs like -O* have the potential to wipe out the 213 # Otherwise globs like -O* have the potential to wipe out the
158 # list of flags. 214 # list of flags.
159 for f in ${!fset}; do 215 for f in ${!fset}; do
165 done 221 done
166 222
167 return 0 223 return 0
168} 224}
169 225
226# @FUNCTION: replace-cpu-flags
227# @USAGE: <old> <new>
228# @DESCRIPTION:
229# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
230# with flags that select the <new> cpu. Accepts shell globs for <old>.
170replace-cpu-flags() { 231replace-cpu-flags() {
171 local newcpu="$#" ; newcpu="${!newcpu}" 232 local newcpu="$#" ; newcpu="${!newcpu}"
172 while [ $# -gt 1 ] ; do 233 while [ $# -gt 1 ] ; do
173 # quote to make sure that no globbing is done (particularly on 234 # quote to make sure that no globbing is done (particularly on
174 # ${oldcpu} prior to calling replace-flags 235 # ${oldcpu}) prior to calling replace-flags
175 replace-flags "-march=${1}" "-march=${newcpu}" 236 replace-flags "-march=${1}" "-march=${newcpu}"
176 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 237 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
177 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 238 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
178 shift 239 shift
179 done 240 done
180 return 0 241 return 0
181} 242}
182 243
244_is_flagq() {
245 local x
246 for x in ${!1} ; do
247 [[ ${x} == $2 ]] && return 0
248 done
249 return 1
250}
251
252# @FUNCTION: is-flagq
253# @USAGE: <flag>
254# @DESCRIPTION:
255# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
256is-flagq() {
257 [[ -n $2 ]] && die "Usage: is-flag <flag>"
258 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
259}
260
261# @FUNCTION: is-flag
262# @USAGE: <flag>
263# @DESCRIPTION:
264# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
183is-flag() { 265is-flag() {
184 local x 266 is-flagq "$@" && echo true
185
186 for x in ${CFLAGS} ${CXXFLAGS} ; do
187 # Note this should work with globs like -mcpu=ultrasparc*
188 if [[ ${x} == ${1} ]]; then
189 echo true
190 return 0
191 fi
192 done
193 return 1
194} 267}
195 268
269# @FUNCTION: is-ldflagq
270# @USAGE: <flag>
271# @DESCRIPTION:
272# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
273is-ldflagq() {
274 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
275 _is_flagq LDFLAGS $1
276}
277
278# @FUNCTION: is-ldflag
279# @USAGE: <flag>
280# @DESCRIPTION:
281# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
282is-ldflag() {
283 is-ldflagq "$@" && echo true
284}
285
286# @FUNCTION: filter-mfpmath
287# @USAGE: <math types>
288# @DESCRIPTION:
289# Remove specified math types from the fpmath flag. For example, if the user
290# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
291# -mfpmath=386.
196filter-mfpmath() { 292filter-mfpmath() {
197 local orig_mfpmath new_math prune_math 293 local orig_mfpmath new_math prune_math
198 294
199 # save the original -mfpmath flag 295 # save the original -mfpmath flag
200 orig_mfpmath="`get-flag -mfpmath`" 296 orig_mfpmath=$(get-flag -mfpmath)
201 # get the value of the current -mfpmath flag 297 # get the value of the current -mfpmath flag
202 new_math=" `get-flag mfpmath | tr , ' '` " 298 new_math=$(get-flag mfpmath)
299 new_math=" ${new_math//,/ } "
203 # figure out which math values are to be removed 300 # figure out which math values are to be removed
204 prune_math="" 301 prune_math=""
205 for prune_math in "$@" ; do 302 for prune_math in "$@" ; do
206 new_math="${new_math/ ${prune_math} / }" 303 new_math=${new_math/ ${prune_math} / }
207 done 304 done
208 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 305 new_math=$(echo ${new_math})
306 new_math=${new_math// /,}
209 307
210 if [ -z "${new_math}" ] ; then 308 if [[ -z ${new_math} ]] ; then
211 # if we're removing all user specified math values are 309 # if we're removing all user specified math values are
212 # slated for removal, then we just filter the flag 310 # slated for removal, then we just filter the flag
213 filter-flags ${orig_mfpmath} 311 filter-flags ${orig_mfpmath}
214 else 312 else
215 # if we only want to filter some of the user specified 313 # if we only want to filter some of the user specified
217 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 315 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
218 fi 316 fi
219 return 0 317 return 0
220} 318}
221 319
320# @FUNCTION: strip-flags
321# @DESCRIPTION:
322# Strip C[XX]FLAGS of everything except known good/safe flags.
222strip-flags() { 323strip-flags() {
223 local x y flag NEW_CFLAGS NEW_CXXFLAGS 324 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
224 325
225 setup-allowed-flags 326 setup-allowed-flags
226 327
227 local NEW_CFLAGS="" 328 local NEW_CFLAGS=""
228 local NEW_CXXFLAGS="" 329 local NEW_CXXFLAGS=""
330 local NEW_FFLAGS=""
331 local NEW_FCFLAGS=""
229 332
230 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 333 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
231 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 334 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
232 use debug && einfo "Enabling the use of some unstable flags"
233 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 335 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
234 fi 336 fi
235 337
236 set -f # disable pathname expansion 338 set -f # disable pathname expansion
237 339
253 break 355 break
254 fi 356 fi
255 done 357 done
256 done 358 done
257 359
360 for x in ${FFLAGS}; do
361 for y in ${ALLOWED_FLAGS}; do
362 flag=${x%%=*}
363 if [ "${flag%%${y}}" = "" ] ; then
364 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
365 break
366 fi
367 done
368 done
369
370 for x in ${FCFLAGS}; do
371 for y in ${ALLOWED_FLAGS}; do
372 flag=${x%%=*}
373 if [ "${flag%%${y}}" = "" ] ; then
374 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
375 break
376 fi
377 done
378 done
379
258 # In case we filtered out all optimization flags fallback to -O2 380 # In case we filtered out all optimization flags fallback to -O2
259 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 381 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
260 NEW_CFLAGS="${NEW_CFLAGS} -O2" 382 NEW_CFLAGS="${NEW_CFLAGS} -O2"
261 fi 383 fi
262 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 384 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
263 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 385 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
264 fi 386 fi
387 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
388 NEW_FFLAGS="${NEW_FFLAGS} -O2"
389 fi
390 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
391 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
392 fi
265 393
266 set +f # re-enable pathname expansion 394 set +f # re-enable pathname expansion
267 395
268 export CFLAGS="${NEW_CFLAGS}" 396 export CFLAGS="${NEW_CFLAGS}"
269 export CXXFLAGS="${NEW_CXXFLAGS}" 397 export CXXFLAGS="${NEW_CXXFLAGS}"
398 export FFLAGS="${NEW_FFLAGS}"
399 export FCFLAGS="${NEW_FCFLAGS}"
400 return 0
401}
402
403test-flag-PROG() {
404 local comp=$1
405 local flags="$2"
406
407 [[ -z ${comp} || -z ${flags} ]] && \
270 return 0 408 return 1
271}
272 409
410 local PROG=$(tc-get${comp})
411 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
412 > /dev/null 2>&1
413}
414
415# @FUNCTION: test-flag-CC
416# @USAGE: <flag>
417# @DESCRIPTION:
418# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
419test-flag-CC() { test-flag-PROG "CC" "$1"; }
420
421# @FUNCTION: test-flag-CXX
422# @USAGE: <flag>
423# @DESCRIPTION:
424# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
425test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
426
427# @FUNCTION: test-flag-F77
428# @USAGE: <flag>
429# @DESCRIPTION:
430# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
431test-flag-F77() { test-flag-PROG "F77" "$1"; }
432
433# @FUNCTION: test-flag-FC
434# @USAGE: <flag>
435# @DESCRIPTION:
436# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
437test-flag-FC() { test-flag-PROG "FC" "$1"; }
438
439test-flags-PROG() {
440 local comp=$1
441 local flags
442 local x
443
444 shift
445
446 [[ -z ${comp} ]] && return 1
447
448 x=""
449 for x in "$@" ; do
450 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
451 done
452
453 echo "${flags}"
454
455 # Just bail if we dont have any flags
456 [[ -n ${flags} ]]
457}
458
459# @FUNCTION: test-flags-CC
460# @USAGE: <flags>
461# @DESCRIPTION:
462# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
463test-flags-CC() { test-flags-PROG "CC" "$@"; }
464
465# @FUNCTION: test-flags-CXX
466# @USAGE: <flags>
467# @DESCRIPTION:
468# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
469test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
470
471# @FUNCTION: test-flags-F77
472# @USAGE: <flags>
473# @DESCRIPTION:
474# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
475test-flags-F77() { test-flags-PROG "F77" "$@"; }
476
477# @FUNCTION: test-flags-FC
478# @USAGE: <flags>
479# @DESCRIPTION:
480# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
481test-flags-FC() { test-flags-PROG "FC" "$@"; }
482
483# @FUNCTION: test-flags
484# @USAGE: <flags>
485# @DESCRIPTION:
486# Short-hand that should hopefully work for both C and C++ compiler, but
487# its really only present due to the append-flags() abomination.
488test-flags() { test-flags-CC "$@"; }
489
490# @FUNCTION: test_flag
491# @DESCRIPTION:
492# DEPRICIATED, use test-flags()
273test_flag() { 493test_flag() {
274 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 494 ewarn "test_flag: deprecated, please use test-flags()!" >&2
275 printf "%s\n" "$*"
276 return 0
277 fi
278 return 1
279}
280 495
496 test-flags-CC "$@"
497}
498
499# @FUNCTION: test_version_info
500# @USAGE: <version>
501# @DESCRIPTION:
502# Returns shell true if the current C compiler version matches <version>, else returns shell false.
503# Accepts shell globs.
281test_version_info() { 504test_version_info() {
282 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 505 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
283 return 0 506 return 0
284 else 507 else
285 return 1 508 return 1
286 fi 509 fi
287} 510}
288 511
512# @FUNCTION: strip-unsupported-flags
513# @DESCRIPTION:
514# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
289strip-unsupported-flags() { 515strip-unsupported-flags() {
290 local NEW_CFLAGS NEW_CXXFLAGS 516 export CFLAGS=$(test-flags-CC ${CFLAGS})
291 517 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
292 for x in ${CFLAGS} ; do 518 export FFLAGS=$(test-flags-F77 ${FFLAGS})
293 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 519 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
294 done
295 for x in ${CXXFLAGS} ; do
296 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
297 done
298
299 export CFLAGS="${NEW_CFLAGS}"
300 export CXXFLAGS="${NEW_CXXFLAGS}"
301} 520}
302 521
522# @FUNCTION: get-flag
523# @USAGE: <flag>
524# @DESCRIPTION:
525# Find and echo the value for a particular flag. Accepts shell globs.
303get-flag() { 526get-flag() {
304 local f findflag="$1" 527 local f findflag="$1"
305 528
306 # this code looks a little flaky but seems to work for 529 # this code looks a little flaky but seems to work for
307 # everything we want ... 530 # everything we want ...
308 # for example, if CFLAGS="-march=i686": 531 # for example, if CFLAGS="-march=i686":
309 # `get-flag -march` == "-march=i686" 532 # `get-flag -march` == "-march=i686"
310 # `get-flag march` == "i686" 533 # `get-flag march` == "i686"
311 for f in ${CFLAGS} ${CXXFLAGS} ; do 534 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
312 if [ "${f/${findflag}}" != "${f}" ] ; then 535 if [ "${f/${findflag}}" != "${f}" ] ; then
313 printf "%s\n" "${f/-${findflag}=}" 536 printf "%s\n" "${f/-${findflag}=}"
314 return 0 537 return 0
315 fi 538 fi
316 done 539 done
317 return 1 540 return 1
318} 541}
319 542
543# @FUNCTION: has_hardened
544# @DESCRIPTION:
545# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
320has_hardened() { 546has_hardened() {
547 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
548
321 test_version_info Hardened && return 0 549 test_version_info Hardened && return 0
322 # the specs file wont exist unless gcc has GCC_SPECS support 550 # The specs file wont exist unless gcc has GCC_SPECS support
323 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 551 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
324 return 0
325 return 1
326} 552}
327 553
554# @FUNCTION: has_pic
555# @DESCRIPTION:
556# DEPRECATED - use gcc-specs-pie from toolchain-funcs
557# indicate whether PIC is set
328has_pic() { 558has_pic() {
329 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 559 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
330 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
331 test_version_info pie && return 0
332 return 1
333}
334 560
561 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
562 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
563 gcc-specs-pie
564}
565
566# @FUNCTION: has_pie
567# @DESCRIPTION:
568# DEPRECATED - use gcc-specs-pie from toolchain-funcs
569# indicate whether PIE is set
335has_pie() { 570has_pie() {
336 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 571 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
337 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 572
338 test_version_info pie && return 0 573 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
339 return 1 574 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
575 gcc-specs-pie
340} 576}
341 577
578# @FUNCTION: has_ssp_all
579# @DESCRIPTION:
580# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
581# indicate whether code for SSP is being generated for all functions
582has_ssp_all() {
583 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
584
585 # note; this matches only -fstack-protector-all
586 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
587 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
588 gcc-specs-ssp-to-all
589}
590
591# @FUNCTION: has_ssp
592# @DESCRIPTION:
593# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
594# indicate whether code for SSP is being generated
342has_ssp() { 595has_ssp() {
596 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
597
598 # note; this matches both -fstack-protector and -fstack-protector-all
343 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 599 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
344 test_version_info ssp && return 0 600 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
345 return 1 601 gcc-specs-ssp
346} 602}
347 603
604# @FUNCTION: has_m64
605# @DESCRIPTION:
606# This doesn't test if the flag is accepted, it tests if the flag actually
607# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
608# return code is 0, else the return code is 1.
348has_m64() { 609has_m64() {
349 # this doesnt test if the flag is accepted, it tests if the flag 610 # this doesnt test if the flag is accepted, it tests if the flag
350 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 611 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
351 # please dont replace this function with test_flag in some future 612 # please dont replace this function with test_flag in some future
352 # clean-up! 613 # clean-up!
614
353 local temp="$(emktemp)" 615 local temp="$(emktemp)"
354 echo "int main() { return(0); }" > ${temp}.c 616 echo "int main() { return(0); }" > "${temp}".c
355 MY_CC=$(tc-getCC) 617 MY_CC=$(tc-getCC)
356 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 618 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
357 local ret=$? 619 local ret=$?
358 rm -f ${temp}.c 620 rm -f "${temp}".c
359 [ "$ret" != "1" ] && return 0 621 [[ ${ret} != 1 ]] && return 0
360 return 1 622 return 1
361} 623}
362 624
625# @FUNCTION: has_m32
626# @DESCRIPTION:
627# This doesn't test if the flag is accepted, it tests if the flag actually
628# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
629# code is 0, else return code is 1.
363has_m32() { 630has_m32() {
364 # this doesnt test if the flag is accepted, it tests if the flag 631 # this doesnt test if the flag is accepted, it tests if the flag
365 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 632 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
366 # please dont replace this function with test_flag in some future 633 # please dont replace this function with test_flag in some future
367 # clean-up! 634 # clean-up!
635
636 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
637
368 local temp="$(emktemp)" 638 local temp=$(emktemp)
369 echo "int main() { return(0); }" > ${temp}.c 639 echo "int main() { return(0); }" > "${temp}".c
370 MY_CC=$(tc-getCC) 640 MY_CC=$(tc-getCC)
371 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 641 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
372 local ret=$? 642 local ret=$?
373 rm -f ${temp}.c 643 rm -f "${temp}".c
374 [ "$ret" != "1" ] && return 0 644 [[ ${ret} != 1 ]] && return 0
375 return 1 645 return 1
376} 646}
377 647
648# @FUNCTION: replace-sparc64-flags
649# @DESCRIPTION:
650# Sets mcpu to v8 and uses the original value as mtune if none specified.
378replace-sparc64-flags() { 651replace-sparc64-flags() {
379 local SPARC64_CPUS="ultrasparc v9" 652 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
380 653
381 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 654 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
382 for x in ${SPARC64_CPUS}; do 655 for x in ${SPARC64_CPUS}; do
383 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 656 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
384 done 657 done
385 else 658 else
386 for x in ${SPARC64_CPUS}; do 659 for x in ${SPARC64_CPUS}; do
387 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 660 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
388 done 661 done
389 fi 662 fi
390 663
391 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 664 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
392 for x in ${SPARC64_CPUS}; do 665 for x in ${SPARC64_CPUS}; do
393 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 666 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
394 done 667 done
395 else 668 else
396 for x in ${SPARC64_CPUS}; do 669 for x in ${SPARC64_CPUS}; do
397 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 670 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
398 done 671 done
399 fi 672 fi
400 673
401 export CFLAGS CXXFLAGS 674 export CFLAGS CXXFLAGS
402} 675}
403 676
677# @FUNCTION: append-libs
678# @USAGE: <libs>
679# @DESCRIPTION:
680# Add extra <libs> to the current LIBS.
681append-libs() {
682 [[ -z $* ]] && return 0
683 local flag
684 for flag in "$@"; do
685 [[ ${flag} == -l* ]] && flag=${flag#-l}
686 export LIBS="${LIBS} -l${flag}"
687 done
688
689 return 0
690}
691
692# @FUNCTION: append-ldflags
693# @USAGE: <flags>
694# @DESCRIPTION:
695# Add extra <flags> to the current LDFLAGS.
404append-ldflags() { 696append-ldflags() {
697 [[ -z $* ]] && return 0
698 local flag
699 for flag in "$@"; do
700 [[ ${flag} == -l* ]] && \
701 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
702 done
703
405 export LDFLAGS="${LDFLAGS} $*" 704 export LDFLAGS="${LDFLAGS} $*"
406 return 0 705 return 0
407} 706}
408 707
708# @FUNCTION: filter-ldflags
709# @USAGE: <flags>
710# @DESCRIPTION:
711# Remove particular <flags> from LDFLAGS. Accepts shell globs.
409filter-ldflags() { 712filter-ldflags() {
410 local x 713 _filter-var LDFLAGS "$@"
714 return 0
715}
411 716
412 # we do this fancy spacing stuff so as to not filter 717# @FUNCTION: raw-ldflags
413 # out part of a flag ... we want flag atoms ! :D 718# @USAGE: <flags>
414 LDFLAGS=" ${LDFLAGS} " 719# @DESCRIPTION:
720# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
721# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
722# to gcc where it needs the '-Wl,'.
723raw-ldflags() {
724 local x input="$@"
725 [[ -z ${input} ]] && input=${LDFLAGS}
726 set --
415 for x in "$@" ; do 727 for x in ${input} ; do
416 LDFLAGS="${LDFLAGS// ${x} / }" 728 x=${x#-Wl,}
729 set -- "$@" ${x//,/ }
417 done 730 done
418 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 731 echo "$@"
419 export LDFLAGS
420 return 0
421} 732}
422 733
423etexec-flags() { 734# @FUNCTION: no-as-needed
424 # if you're not using a hardened compiler you wont need this 735# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
425 # PIC/no-pic kludge in the first place. 736no-as-needed() {
426 has_hardened || return 0 737 case $($(tc-getLD) -v 2>&1 </dev/null) in
427 use amd64 && return 0 738 *GNU*) # GNU ld
428 use mips && return 0 739 echo "-Wl,--no-as-needed" ;;
429 740 esac
430 if has_pie || has_pic; then
431 [ -z "`is-flag -fno-pic`" ] &&
432 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
433 [ -z "`is-flag -nopie`" ] &&
434 export CFLAGS="${CFLAGS} `test_flag -nopie`"
435 fi
436 return 0
437} 741}
438 742
439fstack-flags() { 743# Some tests for when we screw with things and want to make
440 if has_ssp; then 744# sure we didn't break anything
441 [ -z "`is-flag -fno-stack-protector`" ] && 745#TESTS() {
442 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 746# CFLAGS="-a -b -c=1"
443 fi 747# CXXFLAGS="-x -y -z=2"
444 return 0 748# LDFLAGS="-l -m -n=3"
445}
446
447# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
448# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
449# fixes.
450# 749#
451# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 750# die() { exit 1; }
452gcc2-flags() { 751# (is-flag 1 2 3) && die
453 CFLAGS=${CFLAGS//pentium-mmx/i586} 752# (is-ldflag 1 2 3) && die
454 CFLAGS=${CFLAGS//pentium[234]/i686} 753#
455 CFLAGS=${CFLAGS//k6-[23]/k6} 754# is-flagq -l && die
456 CFLAGS=${CFLAGS//athlon-tbird/i686} 755# is-ldflagq -a && die
457 CFLAGS=${CFLAGS//athlon-4/i686} 756# is-flagq -a || die
458 CFLAGS=${CFLAGS//athlon-[xm]p/i686} 757# is-flagq -x || die
459 CFLAGS=${CFLAGS//athlon/i686} 758# is-ldflagq -n=* || die
460 759# is-ldflagq -n && die
461 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586} 760#
462 CXXFLAGS=${CXXFLAGS//pentium[234]/i686} 761# strip-unsupported-flags
463 CXXFLAGS=${CXXFLAGS//k6-[23]/k6} 762# [[ ${CFLAGS} == "-c=1" ]] || die
464 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686} 763# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
465 CXXFLAGS=${CXXFLAGS//athlon-4/i686} 764#
466 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686} 765# echo "All tests pass"
467 CXXFLAGS=${CXXFLAGS//athlon/i686} 766#}
468 767#TESTS
469 if [ "$ARCH" = alpha ]; then
470 CHOST=${CHOST/#alphaev6[78]/alphaev6}
471 CFLAGS=${CFLAGS//ev6[78]/ev6}
472 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
473 fi
474
475 export CFLAGS CXXFLAGS
476}

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