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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 1.149 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
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"
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 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
134 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
135}
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
90 CFLAGS=" ${CFLAGS} " 153 export CFLAGS="${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
91 CXXFLAGS=" ${CXXFLAGS} " 163 export CXXFLAGS="${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 0 164 return 0
99} 165}
100 166
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.
181append-lfs-flags() {
182 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
183 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
184}
185
186# @FUNCTION: append-flags
187# @USAGE: <flags>
188# @DESCRIPTION:
189# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
101append-flags() { 190append-flags() {
102 export CFLAGS="${CFLAGS} $@" 191 [[ -z $* ]] && return 0
103 export CXXFLAGS="${CXXFLAGS} $@" 192 append-cflags "$@"
104 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags 193 append-cxxflags "$@"
194 append-fflags "$@"
105 return 0 195 return 0
106} 196}
107 197
198# @FUNCTION: replace-flags
199# @USAGE: <old> <new>
200# @DESCRIPTION:
201# Replace the <old> flag with <new>. Accepts shell globs for <old>.
108replace-flags() { 202replace-flags() {
109 # we do this fancy spacing stuff so as to not filter 203 [[ $# != 2 ]] \
110 # out part of a flag ... we want flag atoms ! :D 204 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
111 CFLAGS=" ${CFLAGS} " 205 && 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}
119 206
207 local f fset
208 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
209
210 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
211 # Looping over the flags instead of using a global
212 # substitution ensures that we're working with flag atoms.
213 # Otherwise globs like -O* have the potential to wipe out the
214 # list of flags.
215 for f in ${!fset}; do
216 # Note this should work with globs like -O*
217 [[ ${f} == ${1} ]] && f=${2}
218 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
219 done
220 eval export ${fset}=\${new_${fset}\[*]}
221 done
222
223 return 0
224}
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>.
120replace-cpu-flags() { 231replace-cpu-flags() {
121 local newcpu="$1" ; shift 232 local newcpu="$#" ; newcpu="${!newcpu}"
122 local oldcpu="" 233 while [ $# -gt 1 ] ; do
123 for oldcpu in "$@" ; do 234 # quote to make sure that no globbing is done (particularly on
235 # ${oldcpu}) prior to calling replace-flags
124 replace-flags -march=${oldcpu} -march=${newcpu} 236 replace-flags "-march=${1}" "-march=${newcpu}"
125 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 237 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
238 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
239 shift
126 done 240 done
241 return 0
242}
243
244_is_flagq() {
245 local x
246 for x in ${!1} ; do
247 [[ ${x} == $2 ]] && return 0
248 done
127 return 0 249 return 1
128} 250}
129 251
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.
130is-flag() { 265is-flag() {
131 for x in ${CFLAGS} ${CXXFLAGS} ; do 266 is-flagq "$@" && echo true
132 if [ "${x}" == "$1" ] ; then
133 echo true
134 return 0
135 fi
136 done
137 return 1
138} 267}
139 268
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.
140filter-mfpmath() { 292filter-mfpmath() {
293 local orig_mfpmath new_math prune_math
294
141 # save the original -mfpmath flag 295 # save the original -mfpmath flag
142 local orig_mfpmath="`get-flag -mfpmath`" 296 orig_mfpmath=$(get-flag -mfpmath)
143 # get the value of the current -mfpmath flag 297 # get the value of the current -mfpmath flag
144 local new_math=" `get-flag mfpmath | tr , ' '` " 298 new_math=$(get-flag mfpmath)
299 new_math=" ${new_math//,/ } "
145 # figure out which math values are to be removed 300 # figure out which math values are to be removed
146 local prune_math="" 301 prune_math=""
147 for prune_math in "$@" ; do 302 for prune_math in "$@" ; do
148 new_math="${new_math/ ${prune_math} / }" 303 new_math=${new_math/ ${prune_math} / }
149 done 304 done
150 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 305 new_math=$(echo ${new_math})
306 new_math=${new_math// /,}
151 307
152 if [ -z "${new_math}" ] ; then 308 if [[ -z ${new_math} ]] ; then
153 # if we're removing all user specified math values are 309 # if we're removing all user specified math values are
154 # slated for removal, then we just filter the flag 310 # slated for removal, then we just filter the flag
155 filter-flags ${orig_mfpmath} 311 filter-flags ${orig_mfpmath}
156 else 312 else
157 # if we only want to filter some of the user specified 313 # if we only want to filter some of the user specified
159 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 315 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
160 fi 316 fi
161 return 0 317 return 0
162} 318}
163 319
320# @FUNCTION: strip-flags
321# @DESCRIPTION:
322# Strip C[XX]FLAGS of everything except known good/safe flags.
164strip-flags() { 323strip-flags() {
324 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
325
165 setup-allowed-flags 326 setup-allowed-flags
166 327
167 local NEW_CFLAGS="" 328 local NEW_CFLAGS=""
168 local NEW_CXXFLAGS="" 329 local NEW_CXXFLAGS=""
330 local NEW_FFLAGS=""
331 local NEW_FCFLAGS=""
169 332
170 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 333 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
171 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 334 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
172 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
173 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 335 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
174 fi 336 fi
175 337
176 set -f 338 set -f # disable pathname expansion
177 339
178 for x in ${CFLAGS} 340 for x in ${CFLAGS}; do
179 do
180 for y in ${ALLOWED_FLAGS} 341 for y in ${ALLOWED_FLAGS}; do
181 do
182 flag=${x%%=*} 342 flag=${x%%=*}
183 if [ "${flag%%${y}}" = "" ] 343 if [ "${flag%%${y}}" = "" ] ; then
184 then
185 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 344 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
186 break 345 break
187 fi 346 fi
188 done 347 done
189 done 348 done
190 349
191 for x in ${CXXFLAGS} 350 for x in ${CXXFLAGS}; do
192 do
193 for y in ${ALLOWED_FLAGS} 351 for y in ${ALLOWED_FLAGS}; do
194 do
195 flag=${x%%=*} 352 flag=${x%%=*}
196 if [ "${flag%%${y}}" = "" ] 353 if [ "${flag%%${y}}" = "" ] ; then
197 then
198 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 354 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
199 break 355 break
200 fi 356 fi
201 done 357 done
202 done 358 done
203 359
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} ${x}"
375 break
376 fi
377 done
378 done
379
204 # In case we filtered out all optimization flags fallback to -O2 380 # In case we filtered out all optimization flags fallback to -O2
205 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 381 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
206 NEW_CFLAGS="${NEW_CFLAGS} -O2" 382 NEW_CFLAGS="${NEW_CFLAGS} -O2"
207 fi 383 fi
208 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 384 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
209 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 385 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
210 fi 386 fi
387 if [ "${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="${NEW_FCFLAGS} -O2"
392 fi
211 393
212 set +f 394 set +f # re-enable pathname expansion
213
214 [ `use debug` ] \
215 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
216 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
217 395
218 export CFLAGS="${NEW_CFLAGS}" 396 export CFLAGS="${NEW_CFLAGS}"
219 export CXXFLAGS="${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 ${flags} ]] && \
220 return 0 408 return 1
221}
222 409
410 local PROG=$(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()
223test_flag() { 493test_flag() {
224 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then 494 ewarn "test_flag: deprecated, please use test-flags()!" >&2
225 echo "$@" 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.
504test_version_info() {
505 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
226 return 0 506 return 0
227 fi 507 else
228 return 1 508 return 1
509 fi
229} 510}
230 511
512# @FUNCTION: strip-unsupported-flags
513# @DESCRIPTION:
514# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
231strip-unsupported-flags() { 515strip-unsupported-flags() {
232 for x in ${CFLAGS} ; do 516 export CFLAGS=$(test-flags-CC ${CFLAGS})
233 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 517 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
234 done 518 export FFLAGS=$(test-flags-F77 ${FFLAGS})
235 for x in ${CXXFLAGS} ; do 519 export FCFLAGS=$(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} 520}
242 521
522# @FUNCTION: get-flag
523# @USAGE: <flag>
524# @DESCRIPTION:
525# Find and echo the value for a particular flag. Accepts shell globs.
243get-flag() { 526get-flag() {
527 local f findflag="$1"
528
244 # this code looks a little flaky but seems to work for 529 # this code looks a little flaky but seems to work for
245 # everything we want ... 530 # everything we want ...
246 # for example, if CFLAGS="-march=i686": 531 # for example, if CFLAGS="-march=i686":
247 # `get-flags -march` == "-march=i686" 532 # `get-flag -march` == "-march=i686"
248 # `get-flags march` == "i686" 533 # `get-flag march` == "i686"
249 local findflag="$1"
250 for f in ${CFLAGS} ${CXXFLAGS} ; do 534 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
251 if [ "${f/${findflag}}" != "${f}" ] ; then 535 if [ "${f/${findflag}}" != "${f}" ] ; then
252 echo "${f/-${findflag}=}" 536 printf "%s\n" "${f/-${findflag}=}"
253 return 0 537 return 0
254 fi 538 fi
255 done 539 done
256 return 1 540 return 1
257} 541}
258 542
543# @FUNCTION: has_hardened
544# @DESCRIPTION:
545# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
546has_hardened() {
547 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
548
549 test_version_info Hardened && return 0
550 # The specs file wont exist unless gcc has GCC_SPECS support
551 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
552}
553
554# @FUNCTION: has_pic
555# @DESCRIPTION:
556# DEPRECATED - use gcc-specs-pie from toolchain-funcs
557# indicate whether PIC is set
558has_pic() {
559 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
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
570has_pie() {
571 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
572
573 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
574 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
575 gcc-specs-pie
576}
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
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
599 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
600 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
601 gcc-specs-ssp
602}
603
604# @FUNCTION: has_m64
605# @DESCRIPTION:
606# This doesn't test if the flag is accepted, it tests if the flag actually
607# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
608# return code is 0, else the return code is 1.
609has_m64() {
610 # this doesnt test if the flag is accepted, it tests if the flag
611 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
612 # please dont replace this function with test_flag in some future
613 # clean-up!
614
615 local temp="$(emktemp)"
616 echo "int main() { return(0); }" > "${temp}".c
617 MY_CC=$(tc-getCC)
618 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
619 local ret=$?
620 rm -f "${temp}".c
621 [[ ${ret} != 1 ]] && return 0
622 return 1
623}
624
625# @FUNCTION: has_m32
626# @DESCRIPTION:
627# This doesn't test if the flag is accepted, it tests if the flag actually
628# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
629# code is 0, else return code is 1.
630has_m32() {
631 # this doesnt test if the flag is accepted, it tests if the flag
632 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
633 # please dont replace this function with test_flag in some future
634 # clean-up!
635
636 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
637
638 local temp=$(emktemp)
639 echo "int main() { return(0); }" > "${temp}".c
640 MY_CC=$(tc-getCC)
641 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
642 local ret=$?
643 rm -f "${temp}".c
644 [[ ${ret} != 1 ]] && return 0
645 return 1
646}
647
648# @FUNCTION: replace-sparc64-flags
649# @DESCRIPTION:
650# Sets mcpu to v8 and uses the original value as mtune if none specified.
259replace-sparc64-flags() { 651replace-sparc64-flags() {
260 local SPARC64_CPUS="ultrasparc v9" 652 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
261 653
262 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 654 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
263 then
264 for x in ${SPARC64_CPUS} 655 for x in ${SPARC64_CPUS}; do
265 do
266 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 656 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
267 done 657 done
268 else 658 else
269 for x in ${SPARC64_CPUS} 659 for x in ${SPARC64_CPUS}; do
270 do
271 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 660 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
272 done 661 done
273 fi 662 fi
274 663
275 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 664 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
276 then
277 for x in ${SPARC64_CPUS} 665 for x in ${SPARC64_CPUS}; do
278 do
279 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 666 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
280 done 667 done
281 else 668 else
282 for x in ${SPARC64_CPUS} 669 for x in ${SPARC64_CPUS}; do
283 do
284 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 670 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
285 done 671 done
286 fi 672 fi
287}
288 673
674 export CFLAGS CXXFLAGS
675}
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.
289append-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
290 LDFLAGS="${LDFLAGS} $@" 704 export LDFLAGS="${LDFLAGS} $*"
291 return 0 705 return 0
292} 706}
293 707
294etexec-flags() { 708# @FUNCTION: filter-ldflags
295 has_version sys-devel/hardened-gcc 709# @USAGE: <flags>
296 if [ $? == 0 ] ; then 710# @DESCRIPTION:
297 if [ "`is-flag -yet_exec`" != "true" ]; then 711# Remove particular <flags> from LDFLAGS. Accepts shell globs.
298 debug-print ">>> appending flags -yet_exec" 712filter-ldflags() {
299 append-flags -yet_exec 713 _filter-var LDFLAGS "$@"
300 append-ldflags -yet_exec 714 return 0
301 fi
302 fi
303} 715}
304 716
305fstack-flags() { 717# @FUNCTION: raw-ldflags
306 has_version sys-devel/hardened-gcc 718# @USAGE: <flags>
307 if [ $? == 0 ] ; then 719# @DESCRIPTION:
308 if [ "`is-flag -yno_propolice`" != "true" ]; then 720# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
309 debug-print ">>> appending flags -yno_propolice" 721# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
310 append-flags -yno_propolice 722# to gcc where it needs the '-Wl,'.
311 append-ldflags -yno_propolice 723raw-ldflags() {
312 fi 724 local x input="$@"
313 fi 725 [[ -z ${input} ]] && input=${LDFLAGS}
726 set --
727 for x in ${input} ; do
728 x=${x#-Wl,}
729 set -- "$@" ${x//,/ }
730 done
731 echo "$@"
314} 732}
733
734# @FUNCTION: no-as-needed
735# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
736no-as-needed() {
737 case $($(tc-getLD) -v 2>&1 </dev/null) in
738 *GNU*) # GNU ld
739 echo "-Wl,--no-as-needed" ;;
740 esac
741}
742
743# Some tests for when we screw with things and want to make
744# sure we didn't break anything
745#TESTS() {
746# CFLAGS="-a -b -c=1"
747# CXXFLAGS="-x -y -z=2"
748# LDFLAGS="-l -m -n=3"
749#
750# die() { exit 1; }
751# (is-flag 1 2 3) && die
752# (is-ldflag 1 2 3) && die
753#
754# is-flagq -l && die
755# is-ldflagq -a && die
756# is-flagq -a || die
757# is-flagq -x || die
758# is-ldflagq -n=* || die
759# is-ldflagq -n && die
760#
761# strip-unsupported-flags
762# [[ ${CFLAGS} == "-c=1" ]] || die
763# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
764#
765# echo "All tests pass"
766#}
767#TESTS

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