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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 1.82 2005/02/07 17:50:24 solar Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.144 2009/08/16 00:16:12 vapier Exp $
4
5# @ECLASS: flag-o-matic.eclass
6# @MAINTAINER:
7# toolchain@gentoo.org
8# @BLURB: common functions to manipulate and query toolchain flags
9# @DESCRIPTION:
10# This eclass contains a suite of functions to help developers sanely
11# and safely manage toolchain flags in their builds.
12
13inherit eutils toolchain-funcs multilib
14
15################ DEPRECATED functions ################
16# The following are still present to avoid breaking existing
17# code more than necessary; however they are deprecated. Please
18# use gcc-specs-* from toolchain-funcs.eclass instead, if you
19# need to know which hardened techs are active in the compiler.
20# See bug #100974
4# 21#
5# Author Bart Verwilst <verwilst@gentoo.org> 22# has_hardened
23# has_pie
24# has_pic
25# has_ssp_all
26# has_ssp
6 27
7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS"
9 28
10IUSE="debug"
11
12# need access to emktemp()
13inherit eutils toolchain-funcs multilib
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#### fstack-flags ####
62# hooked function for hardened gcc that appends
63# -fno-stack-protector to {C,CXX,LD}FLAGS
64# when a package is filtering -fstack-protector, -fstack-protector-all
65# notice: modern automatic specs files will also suppress -fstack-protector-all
66# when only -fno-stack-protector is given
67#
68
69# 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
70setup-allowed-flags() { 31setup-allowed-flags() {
71 if [ -z "${ALLOWED_FLAGS}" ] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
72 export ALLOWED_FLAGS="-pipe" 33 export ALLOWED_FLAGS="-pipe"
73 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
74 export ALLOWED_FLAGS="${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"
75 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"
76 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 \
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 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
59 # NOTE: currently -Os have issues with gcc3 and K6* arch's
60 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
61 return 0
62}
63
64# inverted filters for hardened compiler. This is trying to unpick
65# the hardened compiler defaults.
66_filter-hardened() {
67 local f
68 for f in "$@" ; do
77 case "${ARCH}" in 69 case "${f}" in
78 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;; 70 # Ideally we should only concern ourselves with PIE flags,
79 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 71 # not -fPIC or -fpic, but too many places filter -fPIC without
80 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 72 # thinking about -fPIE.
81 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 73 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
82 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 74 gcc-specs-pie || continue
83 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;; 75 is-flagq -nopie || append-flags -nopie;;
84 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;; 76 -fstack-protector)
77 gcc-specs-ssp || continue
78 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
79 -fstack-protector-all)
80 gcc-specs-ssp-to-all || continue
81 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
82 -fno-strict-overflow)
83 gcc-specs-nostrict || continue
84 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
85 esac 85 esac
86 fi 86 done
87 # allow a bunch of flags that negate features / control ABI
88 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
89 case "${ARCH}" in
90 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
91 esac
92 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"
93
94 # C[XX]FLAGS that we are think is ok, but needs testing
95 # NOTE: currently -Os have issues with gcc3 and K6* arch's
96 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
97 return 0
98} 87}
99 88
89# Remove occurrences of strings from variable given in $1
90# Strings removed are matched as globs, so for example
91# '-O*' would remove -O1, -O2 etc.
92_filter-var() {
93 local f x VAR VAL
94 declare -a new
95
96 VAR=$1
97 shift
98 eval VAL=\${${VAR}}
99 for f in ${VAL}; do
100 for x in "$@"; do
101 # Note this should work with globs like -O*
102 [[ ${f} == ${x} ]] && continue 2
103 done
104 eval new\[\${\#new\[@]}]=\${f}
105 done
106 eval export ${VAR}=\${new\[*]}
107}
108
109# @FUNCTION: filter-flags
110# @USAGE: <flags>
111# @DESCRIPTION:
112# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
100filter-flags() { 113filter-flags() {
101 local x f fset 114 _filter-hardened "$@"
102 declare -a new_CFLAGS new_CXXFLAGS 115 _filter-var CFLAGS "$@"
103 116 _filter-var CPPFLAGS "$@"
104 for x in "$@" ; do 117 _filter-var CXXFLAGS "$@"
105 case "${x}" in 118 _filter-var FFLAGS "$@"
106 -fPIC|-fpic|-fPIE|-fpie|-pie) 119 _filter-var FCFLAGS "$@"
107 append-flags `test_flag -fno-pie`;;
108 -fstack-protector|-fstack-protector-all)
109 fstack-flags;;
110 esac
111 done
112
113 for fset in CFLAGS CXXFLAGS; do
114 # Looping over the flags instead of using a global
115 # substitution ensures that we're working with flag atoms.
116 # Otherwise globs like -O* have the potential to wipe out the
117 # list of flags.
118 for f in ${!fset}; do
119 for x in "$@"; do
120 # Note this should work with globs like -O*
121 [[ ${f} == ${x} ]] && continue 2
122 done
123 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
124 done
125 eval export ${fset}=\${new_${fset}\[*]}
126 done
127
128 return 0 120 return 0
129} 121}
130 122
123# @FUNCTION: filter-lfs-flags
124# @DESCRIPTION:
125# Remove flags that enable Large File Support.
131filter-lfs-flags() { 126filter-lfs-flags() {
127 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
132 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 128 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
133} 129}
134 130
131# @FUNCTION: append-cppflags
132# @USAGE: <flags>
133# @DESCRIPTION:
134# Add extra <flags> to the current CPPFLAGS.
135append-cppflags() {
136 [[ -z $* ]] && return 0
137 export CPPFLAGS="${CPPFLAGS} $*"
138 return 0
139}
140
141# @FUNCTION: append-cflags
142# @USAGE: <flags>
143# @DESCRIPTION:
144# Add extra <flags> to the current CFLAGS.
145append-cflags() {
146 [[ -z $* ]] && return 0
147 export CFLAGS="${CFLAGS} $*"
148 return 0
149}
150
151# @FUNCTION: append-cxxflags
152# @USAGE: <flags>
153# @DESCRIPTION:
154# Add extra <flags> to the current CXXFLAGS.
155append-cxxflags() {
156 [[ -z $* ]] && return 0
157 export CXXFLAGS="${CXXFLAGS} $*"
158 return 0
159}
160
161# @FUNCTION: append-fflags
162# @USAGE: <flags>
163# @DESCRIPTION:
164# Add extra <flags> to the current {F,FC}FLAGS.
165append-fflags() {
166 [[ -z $* ]] && return 0
167 export FFLAGS="${FFLAGS} $*"
168 export FCFLAGS="${FCFLAGS} $*"
169 return 0
170}
171
172# @FUNCTION: append-lfs-flags
173# @DESCRIPTION:
174# Add flags that enable Large File Support.
135append-lfs-flags() { 175append-lfs-flags() {
176 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
136 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 177 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
137} 178}
138 179
180# @FUNCTION: append-flags
181# @USAGE: <flags>
182# @DESCRIPTION:
183# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
139append-flags() { 184append-flags() {
140 [[ -z $* ]] && return 0 185 [[ -z $* ]] && return 0
141 export CFLAGS="${CFLAGS} $*" 186 append-cflags "$@"
142 export CXXFLAGS="${CXXFLAGS} $*" 187 append-cxxflags "$@"
143 [ -n "`is-flag -fno-stack-protector`" -o \ 188 append-fflags "$@"
144 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
145 return 0 189 return 0
146} 190}
147 191
192# @FUNCTION: replace-flags
193# @USAGE: <old> <new>
194# @DESCRIPTION:
195# Replace the <old> flag with <new>. Accepts shell globs for <old>.
148replace-flags() { 196replace-flags() {
197 [[ $# != 2 ]] \
198 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
199 && die "replace-flags takes 2 arguments, not $#"
200
149 local f fset 201 local f fset
150 declare -a new_CFLAGS new_CXXFLAGS 202 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
151 203
152 for fset in CFLAGS CXXFLAGS; do 204 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
153 # Looping over the flags instead of using a global 205 # Looping over the flags instead of using a global
154 # substitution ensures that we're working with flag atoms. 206 # substitution ensures that we're working with flag atoms.
155 # Otherwise globs like -O* have the potential to wipe out the 207 # Otherwise globs like -O* have the potential to wipe out the
156 # list of flags. 208 # list of flags.
157 for f in ${!fset}; do 209 for f in ${!fset}; do
163 done 215 done
164 216
165 return 0 217 return 0
166} 218}
167 219
220# @FUNCTION: replace-cpu-flags
221# @USAGE: <old> <new>
222# @DESCRIPTION:
223# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
224# with flags that select the <new> cpu. Accepts shell globs for <old>.
168replace-cpu-flags() { 225replace-cpu-flags() {
169 local newcpu="$#" ; newcpu="${!newcpu}" 226 local newcpu="$#" ; newcpu="${!newcpu}"
170 while [ $# -gt 1 ] ; do 227 while [ $# -gt 1 ] ; do
171 # quote to make sure that no globbing is done (particularly on 228 # quote to make sure that no globbing is done (particularly on
172 # ${oldcpu} prior to calling replace-flags 229 # ${oldcpu}) prior to calling replace-flags
173 replace-flags "-march=${1}" "-march=${newcpu}" 230 replace-flags "-march=${1}" "-march=${newcpu}"
174 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 231 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
175 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 232 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
176 shift 233 shift
177 done 234 done
178 return 0 235 return 0
179} 236}
180 237
238_is_flagq() {
239 local x
240 for x in ${!1} ; do
241 [[ ${x} == $2 ]] && return 0
242 done
243 return 1
244}
245
246# @FUNCTION: is-flagq
247# @USAGE: <flag>
248# @DESCRIPTION:
249# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
250is-flagq() {
251 [[ -n $2 ]] && die "Usage: is-flag <flag>"
252 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
253}
254
255# @FUNCTION: is-flag
256# @USAGE: <flag>
257# @DESCRIPTION:
258# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
181is-flag() { 259is-flag() {
182 local x 260 is-flagq "$@" && echo true
183
184 for x in ${CFLAGS} ${CXXFLAGS} ; do
185 # Note this should work with globs like -mcpu=ultrasparc*
186 if [[ ${x} == ${1} ]]; then
187 echo true
188 return 0
189 fi
190 done
191 return 1
192} 261}
193 262
263# @FUNCTION: is-ldflagq
264# @USAGE: <flag>
265# @DESCRIPTION:
266# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
267is-ldflagq() {
268 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
269 _is_flagq LDFLAGS $1
270}
271
272# @FUNCTION: is-ldflag
273# @USAGE: <flag>
274# @DESCRIPTION:
275# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
276is-ldflag() {
277 is-ldflagq "$@" && echo true
278}
279
280# @FUNCTION: filter-mfpmath
281# @USAGE: <math types>
282# @DESCRIPTION:
283# Remove specified math types from the fpmath flag. For example, if the user
284# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
285# -mfpmath=386.
194filter-mfpmath() { 286filter-mfpmath() {
195 local orig_mfpmath new_math prune_math 287 local orig_mfpmath new_math prune_math
196 288
197 # save the original -mfpmath flag 289 # save the original -mfpmath flag
198 orig_mfpmath="`get-flag -mfpmath`" 290 orig_mfpmath=$(get-flag -mfpmath)
199 # get the value of the current -mfpmath flag 291 # get the value of the current -mfpmath flag
200 new_math=" `get-flag mfpmath | tr , ' '` " 292 new_math=$(get-flag mfpmath)
293 new_math=" ${new_math//,/ } "
201 # figure out which math values are to be removed 294 # figure out which math values are to be removed
202 prune_math="" 295 prune_math=""
203 for prune_math in "$@" ; do 296 for prune_math in "$@" ; do
204 new_math="${new_math/ ${prune_math} / }" 297 new_math=${new_math/ ${prune_math} / }
205 done 298 done
206 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 299 new_math=$(echo ${new_math})
300 new_math=${new_math// /,}
207 301
208 if [ -z "${new_math}" ] ; then 302 if [[ -z ${new_math} ]] ; then
209 # if we're removing all user specified math values are 303 # if we're removing all user specified math values are
210 # slated for removal, then we just filter the flag 304 # slated for removal, then we just filter the flag
211 filter-flags ${orig_mfpmath} 305 filter-flags ${orig_mfpmath}
212 else 306 else
213 # if we only want to filter some of the user specified 307 # if we only want to filter some of the user specified
215 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 309 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
216 fi 310 fi
217 return 0 311 return 0
218} 312}
219 313
314# @FUNCTION: strip-flags
315# @DESCRIPTION:
316# Strip C[XX]FLAGS of everything except known good/safe flags.
220strip-flags() { 317strip-flags() {
221 local x y flag NEW_CFLAGS NEW_CXXFLAGS 318 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
222 319
223 setup-allowed-flags 320 setup-allowed-flags
224 321
225 local NEW_CFLAGS="" 322 local NEW_CFLAGS=""
226 local NEW_CXXFLAGS="" 323 local NEW_CXXFLAGS=""
324 local NEW_FFLAGS=""
325 local NEW_FCFLAGS=""
227 326
228 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 327 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
229 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 328 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
230 use debug && einfo "Enabling the use of some unstable flags"
231 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 329 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
232 fi 330 fi
233 331
234 set -f # disable pathname expansion 332 set -f # disable pathname expansion
235 333
251 break 349 break
252 fi 350 fi
253 done 351 done
254 done 352 done
255 353
354 for x in ${FFLAGS}; do
355 for y in ${ALLOWED_FLAGS}; do
356 flag=${x%%=*}
357 if [ "${flag%%${y}}" = "" ] ; then
358 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
359 break
360 fi
361 done
362 done
363
364 for x in ${FCFLAGS}; do
365 for y in ${ALLOWED_FLAGS}; do
366 flag=${x%%=*}
367 if [ "${flag%%${y}}" = "" ] ; then
368 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
369 break
370 fi
371 done
372 done
373
256 # In case we filtered out all optimization flags fallback to -O2 374 # In case we filtered out all optimization flags fallback to -O2
257 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 375 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
258 NEW_CFLAGS="${NEW_CFLAGS} -O2" 376 NEW_CFLAGS="${NEW_CFLAGS} -O2"
259 fi 377 fi
260 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 378 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
261 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 379 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
262 fi 380 fi
381 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
382 NEW_FFLAGS="${NEW_FFLAGS} -O2"
383 fi
384 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
385 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
386 fi
263 387
264 set +f # re-enable pathname expansion 388 set +f # re-enable pathname expansion
265 389
266 export CFLAGS="${NEW_CFLAGS}" 390 export CFLAGS="${NEW_CFLAGS}"
267 export CXXFLAGS="${NEW_CXXFLAGS}" 391 export CXXFLAGS="${NEW_CXXFLAGS}"
392 export FFLAGS="${NEW_FFLAGS}"
393 export FCFLAGS="${NEW_FCFLAGS}"
394 return 0
395}
396
397test-flag-PROG() {
398 local comp=$1
399 local flags="$2"
400
401 [[ -z ${comp} || -z ${flags} ]] && \
268 return 0 402 return 1
269}
270 403
404 local PROG=$(tc-get${comp})
405 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
406 > /dev/null 2>&1
407}
408
409# @FUNCTION: test-flag-CC
410# @USAGE: <flag>
411# @DESCRIPTION:
412# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
413test-flag-CC() { test-flag-PROG "CC" "$1"; }
414
415# @FUNCTION: test-flag-CXX
416# @USAGE: <flag>
417# @DESCRIPTION:
418# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
419test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
420
421# @FUNCTION: test-flag-F77
422# @USAGE: <flag>
423# @DESCRIPTION:
424# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
425test-flag-F77() { test-flag-PROG "F77" "$1"; }
426
427# @FUNCTION: test-flag-FC
428# @USAGE: <flag>
429# @DESCRIPTION:
430# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
431test-flag-FC() { test-flag-PROG "FC" "$1"; }
432
433test-flags-PROG() {
434 local comp=$1
435 local flags
436 local x
437
438 shift
439
440 [[ -z ${comp} ]] && return 1
441
442 x=""
443 for x in "$@" ; do
444 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
445 done
446
447 echo "${flags}"
448
449 # Just bail if we dont have any flags
450 [[ -n ${flags} ]]
451}
452
453# @FUNCTION: test-flags-CC
454# @USAGE: <flags>
455# @DESCRIPTION:
456# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
457test-flags-CC() { test-flags-PROG "CC" "$@"; }
458
459# @FUNCTION: test-flags-CXX
460# @USAGE: <flags>
461# @DESCRIPTION:
462# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
463test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
464
465# @FUNCTION: test-flags-F77
466# @USAGE: <flags>
467# @DESCRIPTION:
468# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
469test-flags-F77() { test-flags-PROG "F77" "$@"; }
470
471# @FUNCTION: test-flags-FC
472# @USAGE: <flags>
473# @DESCRIPTION:
474# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
475test-flags-FC() { test-flags-PROG "FC" "$@"; }
476
477# @FUNCTION: test-flags
478# @USAGE: <flags>
479# @DESCRIPTION:
480# Short-hand that should hopefully work for both C and C++ compiler, but
481# its really only present due to the append-flags() abomination.
482test-flags() { test-flags-CC "$@"; }
483
484# @FUNCTION: test_flag
485# @DESCRIPTION:
486# DEPRICIATED, use test-flags()
271test_flag() { 487test_flag() {
272 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 488 ewarn "test_flag: deprecated, please use test-flags()!" >&2
273 printf "%s\n" "$*"
274 return 0
275 fi
276 return 1
277}
278 489
490 test-flags-CC "$@"
491}
492
493# @FUNCTION: test_version_info
494# @USAGE: <version>
495# @DESCRIPTION:
496# Returns shell true if the current C compiler version matches <version>, else returns shell false.
497# Accepts shell globs.
279test_version_info() { 498test_version_info() {
280 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 499 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
281 return 0 500 return 0
282 else 501 else
283 return 1 502 return 1
284 fi 503 fi
285} 504}
286 505
506# @FUNCTION: strip-unsupported-flags
507# @DESCRIPTION:
508# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
287strip-unsupported-flags() { 509strip-unsupported-flags() {
288 local NEW_CFLAGS NEW_CXXFLAGS 510 export CFLAGS=$(test-flags-CC ${CFLAGS})
289 511 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
290 for x in ${CFLAGS} ; do 512 export FFLAGS=$(test-flags-F77 ${FFLAGS})
291 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 513 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
292 done
293 for x in ${CXXFLAGS} ; do
294 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
295 done
296
297 export CFLAGS="${NEW_CFLAGS}"
298 export CXXFLAGS="${NEW_CXXFLAGS}"
299} 514}
300 515
516# @FUNCTION: get-flag
517# @USAGE: <flag>
518# @DESCRIPTION:
519# Find and echo the value for a particular flag. Accepts shell globs.
301get-flag() { 520get-flag() {
302 local f findflag="$1" 521 local f findflag="$1"
303 522
304 # this code looks a little flaky but seems to work for 523 # this code looks a little flaky but seems to work for
305 # everything we want ... 524 # everything we want ...
306 # for example, if CFLAGS="-march=i686": 525 # for example, if CFLAGS="-march=i686":
307 # `get-flag -march` == "-march=i686" 526 # `get-flag -march` == "-march=i686"
308 # `get-flag march` == "i686" 527 # `get-flag march` == "i686"
309 for f in ${CFLAGS} ${CXXFLAGS} ; do 528 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
310 if [ "${f/${findflag}}" != "${f}" ] ; then 529 if [ "${f/${findflag}}" != "${f}" ] ; then
311 printf "%s\n" "${f/-${findflag}=}" 530 printf "%s\n" "${f/-${findflag}=}"
312 return 0 531 return 0
313 fi 532 fi
314 done 533 done
315 return 1 534 return 1
316} 535}
317 536
537# @FUNCTION: has_hardened
538# @DESCRIPTION:
539# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
318has_hardened() { 540has_hardened() {
541 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
542
319 test_version_info Hardened && return 0 543 test_version_info Hardened && return 0
320 # the specs file wont exist unless gcc has GCC_SPECS support 544 # The specs file wont exist unless gcc has GCC_SPECS support
321 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 545 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
322 return 0
323 return 1
324} 546}
325 547
548# @FUNCTION: has_pic
549# @DESCRIPTION:
550# DEPRECATED - use gcc-specs-pie from toolchain-funcs
326# indicate whether PIC is set 551# indicate whether PIC is set
327has_pic() { 552has_pic() {
328 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 553 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
329 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
330 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
331 test_version_info pie && return 0
332 return 1
333}
334 554
555 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
556 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
557 gcc-specs-pie
558}
559
560# @FUNCTION: has_pie
561# @DESCRIPTION:
562# DEPRECATED - use gcc-specs-pie from toolchain-funcs
335# indicate whether PIE is set 563# indicate whether PIE is set
336has_pie() { 564has_pie() {
337 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 565 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
338 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 566
567 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
568 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
569 gcc-specs-pie
570}
571
572# @FUNCTION: has_ssp_all
573# @DESCRIPTION:
574# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
575# indicate whether code for SSP is being generated for all functions
576has_ssp_all() {
577 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
578
579 # note; this matches only -fstack-protector-all
580 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
339 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0 581 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
340 # test PIC while waiting for specs to be updated to generate __PIE__ 582 gcc-specs-ssp-to-all
341 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
342 return 1
343} 583}
344 584
585# @FUNCTION: has_ssp
586# @DESCRIPTION:
587# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
345# indicate whether code for SSP is being generated 588# indicate whether code for SSP is being generated
346has_ssp() { 589has_ssp() {
590 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
591
347 # note; this matches both -fstack-protector and -fstack-protector-all 592 # note; this matches both -fstack-protector and -fstack-protector-all
348 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 593 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
349 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0 594 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
350 return 1 595 gcc-specs-ssp
351} 596}
352 597
598# @FUNCTION: has_m64
599# @DESCRIPTION:
600# This doesn't test if the flag is accepted, it tests if the flag actually
601# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
602# return code is 0, else the return code is 1.
353has_m64() { 603has_m64() {
354 # this doesnt test if the flag is accepted, it tests if the flag 604 # this doesnt test if the flag is accepted, it tests if the flag
355 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 605 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
356 # please dont replace this function with test_flag in some future 606 # please dont replace this function with test_flag in some future
357 # clean-up! 607 # clean-up!
608
358 local temp="$(emktemp)" 609 local temp="$(emktemp)"
359 echo "int main() { return(0); }" > ${temp}.c 610 echo "int main() { return(0); }" > "${temp}".c
360 MY_CC=$(tc-getCC) 611 MY_CC=$(tc-getCC)
361 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 612 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
362 local ret=$? 613 local ret=$?
363 rm -f ${temp}.c 614 rm -f "${temp}".c
364 [ "$ret" != "1" ] && return 0 615 [[ ${ret} != 1 ]] && return 0
365 return 1 616 return 1
366} 617}
367 618
619# @FUNCTION: has_m32
620# @DESCRIPTION:
621# This doesn't test if the flag is accepted, it tests if the flag actually
622# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
623# code is 0, else return code is 1.
368has_m32() { 624has_m32() {
369 # this doesnt test if the flag is accepted, it tests if the flag 625 # this doesnt test if the flag is accepted, it tests if the flag
370 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 626 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
371 # please dont replace this function with test_flag in some future 627 # please dont replace this function with test_flag in some future
372 # clean-up! 628 # clean-up!
373 629
374 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0 630 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
375 631
376 local temp="$(emktemp)" 632 local temp=$(emktemp)
377 echo "int main() { return(0); }" > ${temp}.c 633 echo "int main() { return(0); }" > "${temp}".c
378 MY_CC=$(tc-getCC) 634 MY_CC=$(tc-getCC)
379 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 635 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
380 local ret=$? 636 local ret=$?
381 rm -f ${temp}.c 637 rm -f "${temp}".c
382 [ "$ret" != "1" ] && return 0 638 [[ ${ret} != 1 ]] && return 0
383 return 1 639 return 1
384} 640}
385 641
642# @FUNCTION: replace-sparc64-flags
643# @DESCRIPTION:
644# Sets mcpu to v8 and uses the original value as mtune if none specified.
386replace-sparc64-flags() { 645replace-sparc64-flags() {
387 local SPARC64_CPUS="ultrasparc v9" 646 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
388 647
389 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 648 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
390 for x in ${SPARC64_CPUS}; do 649 for x in ${SPARC64_CPUS}; do
391 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 650 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
392 done 651 done
393 else 652 else
394 for x in ${SPARC64_CPUS}; do 653 for x in ${SPARC64_CPUS}; do
395 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 654 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
396 done 655 done
397 fi 656 fi
398 657
399 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 658 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
400 for x in ${SPARC64_CPUS}; do 659 for x in ${SPARC64_CPUS}; do
401 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 660 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
402 done 661 done
403 else 662 else
404 for x in ${SPARC64_CPUS}; do 663 for x in ${SPARC64_CPUS}; do
405 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 664 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
406 done 665 done
407 fi 666 fi
408 667
409 export CFLAGS CXXFLAGS 668 export CFLAGS CXXFLAGS
410} 669}
411 670
671# @FUNCTION: append-ldflags
672# @USAGE: <flags>
673# @DESCRIPTION:
674# Add extra <flags> to the current LDFLAGS.
412append-ldflags() { 675append-ldflags() {
676 [[ -z $* ]] && return 0
677 local flag
678 for flag in "$@"; do
679 [[ ${flag} == -l* ]] && \
680 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
681 done
682
413 export LDFLAGS="${LDFLAGS} $*" 683 export LDFLAGS="${LDFLAGS} $*"
414 return 0 684 return 0
415} 685}
416 686
687# @FUNCTION: filter-ldflags
688# @USAGE: <flags>
689# @DESCRIPTION:
690# Remove particular <flags> from LDFLAGS. Accepts shell globs.
417filter-ldflags() { 691filter-ldflags() {
418 local x 692 _filter-var LDFLAGS "$@"
693 return 0
694}
419 695
420 # we do this fancy spacing stuff so as to not filter 696# @FUNCTION: raw-ldflags
421 # out part of a flag ... we want flag atoms ! :D 697# @USAGE: <flags>
422 LDFLAGS=" ${LDFLAGS} " 698# @DESCRIPTION:
699# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
700# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
701# to gcc where it needs the '-Wl,'.
702raw-ldflags() {
703 local x input="$@"
704 [[ -z ${input} ]] && input=${LDFLAGS}
705 set --
423 for x in "$@" ; do 706 for x in ${input} ; do
424 LDFLAGS="${LDFLAGS// ${x} / }" 707 x=${x#-Wl,}
708 set -- "$@" ${x//,/ }
425 done 709 done
426 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 710 echo "$@"
427 export LDFLAGS
428 return 0
429} 711}
430 712
431fstack-flags() { 713# @FUNCTION: bindnow-flags
432 if has_ssp; then 714# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
433 [ -z "`is-flag -fno-stack-protector`" ] && 715# @DESCRIPTION:
434 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 716# DEPRECATED - Gets the flags needed for "NOW" binding
435 fi 717bindnow-flags() {
436 return 0 718 eerror "QA: stop using the bindnow-flags function ... simply drop it from your ebuild"
719 die "Stop using bindnow-flags."
437} 720}
438 721
439# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 722
440# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 723# Some tests for when we screw with things and want to make
441# fixes. 724# sure we didn't break anything
725#TESTS() {
726# CFLAGS="-a -b -c=1"
727# CXXFLAGS="-x -y -z=2"
728# LDFLAGS="-l -m -n=3"
442# 729#
443# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 730# die() { exit 1; }
444gcc2-flags() { 731# (is-flag 1 2 3) && die
445 CFLAGS=${CFLAGS//pentium-mmx/i586} 732# (is-ldflag 1 2 3) && die
446 CFLAGS=${CFLAGS//pentium[234]/i686} 733#
447 CFLAGS=${CFLAGS//k6-[23]/k6} 734# is-flagq -l && die
448 CFLAGS=${CFLAGS//athlon-tbird/i686} 735# is-ldflagq -a && die
449 CFLAGS=${CFLAGS//athlon-4/i686} 736# is-flagq -a || die
450 CFLAGS=${CFLAGS//athlon-[xm]p/i686} 737# is-flagq -x || die
451 CFLAGS=${CFLAGS//athlon/i686} 738# is-ldflagq -n=* || die
452 739# is-ldflagq -n && die
453 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586} 740#
454 CXXFLAGS=${CXXFLAGS//pentium[234]/i686} 741# strip-unsupported-flags
455 CXXFLAGS=${CXXFLAGS//k6-[23]/k6} 742# [[ ${CFLAGS} == "-c=1" ]] || die
456 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686} 743# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
457 CXXFLAGS=${CXXFLAGS//athlon-4/i686} 744#
458 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686} 745# echo "All tests pass"
459 CXXFLAGS=${CXXFLAGS//athlon/i686} 746#}
460 747#TESTS
461 if [ "$ARCH" = alpha ]; then
462 CHOST=${CHOST/#alphaev6[78]/alphaev6}
463 CFLAGS=${CFLAGS//ev6[78]/ev6}
464 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
465 fi
466
467 export CFLAGS CXXFLAGS
468}

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