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Revision 1.91 Revision 1.163
1# Copyright 1999-2005 Gentoo Foundation 1# Copyright 1999-2011 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.91 2005/07/22 21:47:51 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.163 2011/12/28 06:28:55 dirtyepic Exp $
4 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.
5 12
6# need access to emktemp() 13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15
7inherit eutils toolchain-funcs multilib 16inherit eutils toolchain-funcs multilib
8 17
18################ DEPRECATED functions ################
19# The following are still present to avoid breaking existing
20# code more than necessary; however they are deprecated. Please
21# use gcc-specs-* from toolchain-funcs.eclass instead, if you
22# need to know which hardened techs are active in the compiler.
23# See bug #100974
9# 24#
10#### filter-flags <flags> #### 25# has_hardened
11# Remove particular flags from C[XX]FLAGS 26# has_pie
12# Matches only complete flags 27# has_pic
13#
14#### append-flags <flags> ####
15# Add extra flags to your current C[XX]FLAGS
16#
17#### replace-flags <orig.flag> <new.flag> ###
18# Replace a flag by another one
19#
20#### replace-cpu-flags <old.cpus> <new.cpu> ###
21# Replace march/mcpu flags that specify <old.cpus>
22# with flags that specify <new.cpu>
23#
24#### is-flag <flag> ####
25# Returns "true" if flag is set in C[XX]FLAGS
26# Matches only complete a flag
27#
28#### strip-flags ####
29# Strip C[XX]FLAGS of everything except known
30# good options.
31#
32#### strip-unsupported-flags ####
33# Strip C[XX]FLAGS of any flags not supported by
34# installed version of gcc
35#
36#### get-flag <flag> ####
37# Find and echo the value for a particular flag
38#
39#### replace-sparc64-flags ####
40# Sets mcpu to v8 and uses the original value
41# as mtune if none specified.
42#
43#### filter-mfpmath <math types> ####
44# Remove specified math types from the fpmath specification
45# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
46# will leave the user with -mfpmath=386
47#
48#### append-ldflags ####
49# Add extra flags to your current LDFLAGS
50#
51#### filter-ldflags <flags> ####
52# Remove particular flags from LDFLAGS
53# Matches only complete flags
54#
55#### fstack-flags ####
56# hooked function for hardened gcc that appends
57# -fno-stack-protector to {C,CXX,LD}FLAGS
58# when a package is filtering -fstack-protector, -fstack-protector-all
59# notice: modern automatic specs files will also suppress -fstack-protector-all
60# when only -fno-stack-protector is given
61#
62#### has_pic ####
63# Returns true if the compiler by default or with current CFLAGS
64# builds position-independent code.
65#
66#### has_ssp_all #### 28# has_ssp_all
67# Returns true if the compiler by default or with current CFLAGS 29# has_ssp
68# generates stack smash protections for all functions
69#
70#### has_ssp ####
71# Returns true if the compiler by default or with current CFLAGS
72# generates stack smash protections for most vulnerable functions
73#
74 30
31
75# C[XX]FLAGS that we allow in strip-flags 32# {C,CXX,F,FC}FLAGS that we allow in strip-flags
33# Note: shell globs and character lists are allowed
76setup-allowed-flags() { 34setup-allowed-flags() {
77 if [[ -z ${ALLOWED_FLAGS} ]] ; then
78 export ALLOWED_FLAGS="-pipe" 35 ALLOWED_FLAGS="-pipe"
79 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 36 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 37 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 38 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
82 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 39 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
83 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 40 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
84 fi 41 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
42 ALLOWED_FLAGS+=" -W* -w"
43
85 # allow a bunch of flags that negate features / control ABI 44 # allow a bunch of flags that negate features / control ABI
86 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 45 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
46 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
47 -fno-omit-frame-pointer"
87 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 48 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
88 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 49 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
50 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
89 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 51 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
90 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 52 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
91 -mieee -mieee-with-inexact \ 53 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
92 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 54 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
93 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 55 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
94 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 56 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
95 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 57 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
96 58
97 # C[XX]FLAGS that we are think is ok, but needs testing 59 # 4.5
98 # NOTE: currently -Os have issues with gcc3 and K6* arch's 60 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
99 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 61 # 4.6
100 return 0 62 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
101}
102 63
64 export ALLOWED_FLAGS
65 return 0
66}
67
68# inverted filters for hardened compiler. This is trying to unpick
69# the hardened compiler defaults.
70_filter-hardened() {
71 local f
72 for f in "$@" ; do
73 case "${f}" in
74 # Ideally we should only concern ourselves with PIE flags,
75 # not -fPIC or -fpic, but too many places filter -fPIC without
76 # thinking about -fPIE.
77 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
78 gcc-specs-pie || continue
79 is-flagq -nopie || append-flags -nopie;;
80 -fstack-protector)
81 gcc-specs-ssp || continue
82 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
83 -fstack-protector-all)
84 gcc-specs-ssp-to-all || continue
85 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
86 -fno-strict-overflow)
87 gcc-specs-nostrict || continue
88 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
89 esac
90 done
91}
92
93# Remove occurrences of strings from variable given in $1
94# Strings removed are matched as globs, so for example
95# '-O*' would remove -O1, -O2 etc.
96_filter-var() {
97 local f x VAR VAL
98 declare -a new
99
100 VAR=$1
101 shift
102 eval VAL=\${${VAR}}
103 for f in ${VAL}; do
104 for x in "$@"; do
105 # Note this should work with globs like -O*
106 [[ ${f} == ${x} ]] && continue 2
107 done
108 eval new\[\${\#new\[@]}]=\${f}
109 done
110 eval export ${VAR}=\${new\[*]}
111}
112
113# @FUNCTION: filter-flags
114# @USAGE: <flags>
115# @DESCRIPTION:
116# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
103filter-flags() { 117filter-flags() {
104 local x f fset 118 _filter-hardened "$@"
105 declare -a new_CFLAGS new_CXXFLAGS 119 _filter-var CFLAGS "$@"
106 120 _filter-var CPPFLAGS "$@"
107 for x in "$@" ; do 121 _filter-var CXXFLAGS "$@"
108 case "${x}" in 122 _filter-var FFLAGS "$@"
109 -fPIC|-fpic|-fPIE|-fpie|-pie) 123 _filter-var FCFLAGS "$@"
110 append-flags `test_flag -fno-pie`;;
111 -fstack-protector|-fstack-protector-all)
112 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 0 124 return 0
132} 125}
133 126
127# @FUNCTION: filter-lfs-flags
128# @DESCRIPTION:
129# Remove flags that enable Large File Support.
134filter-lfs-flags() { 130filter-lfs-flags() {
131 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
132 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
133 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
134 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
135 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
135 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 136 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136} 137}
137 138
139# @FUNCTION: append-cppflags
140# @USAGE: <flags>
141# @DESCRIPTION:
142# Add extra <flags> to the current CPPFLAGS.
143append-cppflags() {
144 [[ $# -eq 0 ]] && return 0
145 export CPPFLAGS="${CPPFLAGS} $*"
146 return 0
147}
148
149# @FUNCTION: append-cflags
150# @USAGE: <flags>
151# @DESCRIPTION:
152# Add extra <flags> to the current CFLAGS.
153append-cflags() {
154 [[ $# -eq 0 ]] && return 0
155 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
156 return 0
157}
158
159# @FUNCTION: append-cxxflags
160# @USAGE: <flags>
161# @DESCRIPTION:
162# Add extra <flags> to the current CXXFLAGS.
163append-cxxflags() {
164 [[ $# -eq 0 ]] && return 0
165 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
166 return 0
167}
168
169# @FUNCTION: append-fflags
170# @USAGE: <flags>
171# @DESCRIPTION:
172# Add extra <flags> to the current {F,FC}FLAGS.
173append-fflags() {
174 [[ $# -eq 0 ]] && return 0
175 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
176 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
177 return 0
178}
179
180# @FUNCTION: append-lfs-flags
181# @DESCRIPTION:
182# Add flags that enable Large File Support.
138append-lfs-flags() { 183append-lfs-flags() {
184 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
185 # see comments in filter-lfs-flags func for meaning of these
139 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 186 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
140} 187}
141 188
189# @FUNCTION: append-flags
190# @USAGE: <flags>
191# @DESCRIPTION:
192# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
142append-flags() { 193append-flags() {
143 [[ -z $* ]] && return 0 194 [[ $# -eq 0 ]] && return 0
144 export CFLAGS="${CFLAGS} $*" 195 append-cflags "$@"
145 export CXXFLAGS="${CXXFLAGS} $*" 196 append-cxxflags "$@"
146 [ -n "`is-flag -fno-stack-protector`" -o \ 197 append-fflags "$@"
147 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
148 return 0 198 return 0
149} 199}
150 200
201# @FUNCTION: replace-flags
202# @USAGE: <old> <new>
203# @DESCRIPTION:
204# Replace the <old> flag with <new>. Accepts shell globs for <old>.
151replace-flags() { 205replace-flags() {
206 [[ $# != 2 ]] \
207 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
208 && die "replace-flags takes 2 arguments, not $#"
209
152 local f fset 210 local f fset
153 declare -a new_CFLAGS new_CXXFLAGS 211 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
154 212
155 for fset in CFLAGS CXXFLAGS; do 213 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
156 # Looping over the flags instead of using a global 214 # Looping over the flags instead of using a global
157 # substitution ensures that we're working with flag atoms. 215 # substitution ensures that we're working with flag atoms.
158 # Otherwise globs like -O* have the potential to wipe out the 216 # Otherwise globs like -O* have the potential to wipe out the
159 # list of flags. 217 # list of flags.
160 for f in ${!fset}; do 218 for f in ${!fset}; do
166 done 224 done
167 225
168 return 0 226 return 0
169} 227}
170 228
229# @FUNCTION: replace-cpu-flags
230# @USAGE: <old> <new>
231# @DESCRIPTION:
232# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
233# with flags that select the <new> cpu. Accepts shell globs for <old>.
171replace-cpu-flags() { 234replace-cpu-flags() {
172 local newcpu="$#" ; newcpu="${!newcpu}" 235 local newcpu="$#" ; newcpu="${!newcpu}"
173 while [ $# -gt 1 ] ; do 236 while [ $# -gt 1 ] ; do
174 # quote to make sure that no globbing is done (particularly on 237 # quote to make sure that no globbing is done (particularly on
175 # ${oldcpu} prior to calling replace-flags 238 # ${oldcpu}) prior to calling replace-flags
176 replace-flags "-march=${1}" "-march=${newcpu}" 239 replace-flags "-march=${1}" "-march=${newcpu}"
177 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 240 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
178 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 241 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
179 shift 242 shift
180 done 243 done
181 return 0 244 return 0
182} 245}
183 246
247_is_flagq() {
248 local x
249 for x in ${!1} ; do
250 [[ ${x} == $2 ]] && return 0
251 done
252 return 1
253}
254
255# @FUNCTION: is-flagq
256# @USAGE: <flag>
257# @DESCRIPTION:
258# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
259is-flagq() {
260 [[ -n $2 ]] && die "Usage: is-flag <flag>"
261 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
262}
263
264# @FUNCTION: is-flag
265# @USAGE: <flag>
266# @DESCRIPTION:
267# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
184is-flag() { 268is-flag() {
185 local x 269 is-flagq "$@" && echo true
186
187 for x in ${CFLAGS} ${CXXFLAGS} ; do
188 # Note this should work with globs like -mcpu=ultrasparc*
189 if [[ ${x} == ${1} ]]; then
190 echo true
191 return 0
192 fi
193 done
194 return 1
195} 270}
196 271
272# @FUNCTION: is-ldflagq
273# @USAGE: <flag>
274# @DESCRIPTION:
275# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
276is-ldflagq() {
277 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
278 _is_flagq LDFLAGS $1
279}
280
281# @FUNCTION: is-ldflag
282# @USAGE: <flag>
283# @DESCRIPTION:
284# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
285is-ldflag() {
286 is-ldflagq "$@" && echo true
287}
288
289# @FUNCTION: filter-mfpmath
290# @USAGE: <math types>
291# @DESCRIPTION:
292# Remove specified math types from the fpmath flag. For example, if the user
293# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
294# -mfpmath=386.
197filter-mfpmath() { 295filter-mfpmath() {
198 local orig_mfpmath new_math prune_math 296 local orig_mfpmath new_math prune_math
199 297
200 # save the original -mfpmath flag 298 # save the original -mfpmath flag
201 orig_mfpmath="`get-flag -mfpmath`" 299 orig_mfpmath=$(get-flag -mfpmath)
202 # get the value of the current -mfpmath flag 300 # get the value of the current -mfpmath flag
203 new_math=" `get-flag mfpmath | tr , ' '` " 301 new_math=$(get-flag mfpmath)
302 new_math=" ${new_math//,/ } "
204 # figure out which math values are to be removed 303 # figure out which math values are to be removed
205 prune_math="" 304 prune_math=""
206 for prune_math in "$@" ; do 305 for prune_math in "$@" ; do
207 new_math="${new_math/ ${prune_math} / }" 306 new_math=${new_math/ ${prune_math} / }
208 done 307 done
209 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 308 new_math=$(echo ${new_math})
309 new_math=${new_math// /,}
210 310
211 if [ -z "${new_math}" ] ; then 311 if [[ -z ${new_math} ]] ; then
212 # if we're removing all user specified math values are 312 # if we're removing all user specified math values are
213 # slated for removal, then we just filter the flag 313 # slated for removal, then we just filter the flag
214 filter-flags ${orig_mfpmath} 314 filter-flags ${orig_mfpmath}
215 else 315 else
216 # if we only want to filter some of the user specified 316 # if we only want to filter some of the user specified
218 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 318 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
219 fi 319 fi
220 return 0 320 return 0
221} 321}
222 322
323# @FUNCTION: strip-flags
324# @DESCRIPTION:
325# Strip C[XX]FLAGS of everything except known good/safe flags.
223strip-flags() { 326strip-flags() {
224 local x y flag NEW_CFLAGS NEW_CXXFLAGS 327 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
225 328
226 setup-allowed-flags 329 setup-allowed-flags
227 330
228 local NEW_CFLAGS="" 331 local NEW_CFLAGS=""
229 local NEW_CXXFLAGS="" 332 local NEW_CXXFLAGS=""
230 333 local NEW_FFLAGS=""
231 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 334 local NEW_FCFLAGS=""
232 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
233 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
234 fi
235 335
236 set -f # disable pathname expansion 336 set -f # disable pathname expansion
237 337
238 for x in ${CFLAGS}; do 338 for x in ${CFLAGS}; do
239 for y in ${ALLOWED_FLAGS}; do 339 for y in ${ALLOWED_FLAGS}; do
253 break 353 break
254 fi 354 fi
255 done 355 done
256 done 356 done
257 357
358 for x in ${FFLAGS}; do
359 for y in ${ALLOWED_FLAGS}; do
360 flag=${x%%=*}
361 if [ "${flag%%${y}}" = "" ] ; then
362 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
363 break
364 fi
365 done
366 done
367
368 for x in ${FCFLAGS}; do
369 for y in ${ALLOWED_FLAGS}; do
370 flag=${x%%=*}
371 if [ "${flag%%${y}}" = "" ] ; then
372 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
373 break
374 fi
375 done
376 done
377
258 # In case we filtered out all optimization flags fallback to -O2 378 # In case we filtered out all optimization flags fallback to -O2
259 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 379 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
260 NEW_CFLAGS="${NEW_CFLAGS} -O2" 380 NEW_CFLAGS="${NEW_CFLAGS} -O2"
261 fi 381 fi
262 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 382 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
263 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 383 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
264 fi 384 fi
385 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
386 NEW_FFLAGS="${NEW_FFLAGS} -O2"
387 fi
388 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
389 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
390 fi
265 391
266 set +f # re-enable pathname expansion 392 set +f # re-enable pathname expansion
267 393
268 export CFLAGS="${NEW_CFLAGS}" 394 export CFLAGS="${NEW_CFLAGS}"
269 export CXXFLAGS="${NEW_CXXFLAGS}" 395 export CXXFLAGS="${NEW_CXXFLAGS}"
270 return 0 396 export FFLAGS="${NEW_FFLAGS}"
271} 397 export FCFLAGS="${NEW_FCFLAGS}"
272
273test_flag() {
274 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
275 printf "%s\n" "$*"
276 return 0 398 return 0
277 fi
278 return 1
279} 399}
280 400
401test-flag-PROG() {
402 local comp=$1
403 local flags="$2"
404
405 [[ -z ${comp} || -z ${flags} ]] && return 1
406
407 # use -c so we can test the assembler as well
408 local PROG=$(tc-get${comp})
409 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
410 > /dev/null 2>&1
411}
412
413# @FUNCTION: test-flag-CC
414# @USAGE: <flag>
415# @DESCRIPTION:
416# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
417test-flag-CC() { test-flag-PROG "CC" "$1"; }
418
419# @FUNCTION: test-flag-CXX
420# @USAGE: <flag>
421# @DESCRIPTION:
422# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
423test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
424
425# @FUNCTION: test-flag-F77
426# @USAGE: <flag>
427# @DESCRIPTION:
428# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
429test-flag-F77() { test-flag-PROG "F77" "$1"; }
430
431# @FUNCTION: test-flag-FC
432# @USAGE: <flag>
433# @DESCRIPTION:
434# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
435test-flag-FC() { test-flag-PROG "FC" "$1"; }
436
437test-flags-PROG() {
438 local comp=$1
439 local flags
440 local x
441
442 shift
443
444 [[ -z ${comp} ]] && return 1
445
446 for x in "$@" ; do
447 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
448 done
449
450 echo "${flags}"
451
452 # Just bail if we dont have any flags
453 [[ -n ${flags} ]]
454}
455
456# @FUNCTION: test-flags-CC
457# @USAGE: <flags>
458# @DESCRIPTION:
459# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
460test-flags-CC() { test-flags-PROG "CC" "$@"; }
461
462# @FUNCTION: test-flags-CXX
463# @USAGE: <flags>
464# @DESCRIPTION:
465# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
466test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
467
468# @FUNCTION: test-flags-F77
469# @USAGE: <flags>
470# @DESCRIPTION:
471# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
472test-flags-F77() { test-flags-PROG "F77" "$@"; }
473
474# @FUNCTION: test-flags-FC
475# @USAGE: <flags>
476# @DESCRIPTION:
477# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
478test-flags-FC() { test-flags-PROG "FC" "$@"; }
479
480# @FUNCTION: test-flags
481# @USAGE: <flags>
482# @DESCRIPTION:
483# Short-hand that should hopefully work for both C and C++ compiler, but
484# its really only present due to the append-flags() abomination.
485test-flags() { test-flags-CC "$@"; }
486
487# @FUNCTION: test_version_info
488# @USAGE: <version>
489# @DESCRIPTION:
490# Returns shell true if the current C compiler version matches <version>, else returns shell false.
491# Accepts shell globs.
281test_version_info() { 492test_version_info() {
282 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 493 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
283 return 0 494 return 0
284 else 495 else
285 return 1 496 return 1
286 fi 497 fi
287} 498}
288 499
500# @FUNCTION: strip-unsupported-flags
501# @DESCRIPTION:
502# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
289strip-unsupported-flags() { 503strip-unsupported-flags() {
290 local NEW_CFLAGS NEW_CXXFLAGS 504 export CFLAGS=$(test-flags-CC ${CFLAGS})
291 505 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
292 for x in ${CFLAGS} ; do 506 export FFLAGS=$(test-flags-F77 ${FFLAGS})
293 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 507 export FCFLAGS=$(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} 508}
302 509
510# @FUNCTION: get-flag
511# @USAGE: <flag>
512# @DESCRIPTION:
513# Find and echo the value for a particular flag. Accepts shell globs.
303get-flag() { 514get-flag() {
304 local f findflag="$1" 515 local f findflag="$1"
305 516
306 # this code looks a little flaky but seems to work for 517 # this code looks a little flaky but seems to work for
307 # everything we want ... 518 # everything we want ...
308 # for example, if CFLAGS="-march=i686": 519 # for example, if CFLAGS="-march=i686":
309 # `get-flag -march` == "-march=i686" 520 # `get-flag -march` == "-march=i686"
310 # `get-flag march` == "i686" 521 # `get-flag march` == "i686"
311 for f in ${CFLAGS} ${CXXFLAGS} ; do 522 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
312 if [ "${f/${findflag}}" != "${f}" ] ; then 523 if [ "${f/${findflag}}" != "${f}" ] ; then
313 printf "%s\n" "${f/-${findflag}=}" 524 printf "%s\n" "${f/-${findflag}=}"
314 return 0 525 return 0
315 fi 526 fi
316 done 527 done
317 return 1 528 return 1
318} 529}
319 530
320has_hardened() { 531# DEAD FUNCS. Remove by Dec 2011.
321 test_version_info Hardened && return 0 532test_flag() { die "$0: deprecated, please use test-flags()!" ; }
322 # the specs file wont exist unless gcc has GCC_SPECS support 533has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
323 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 534has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
324 return 0 535has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
325 return 1 536has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
326} 537has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
327 538
328# indicate whether PIC is set 539# @FUNCTION: has_m64
329has_pic() { 540# @DESCRIPTION:
330 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 541# This doesn't test if the flag is accepted, it tests if the flag actually
331 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 542# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
332 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0 543# return code is 0, else the return code is 1.
333 return 1
334}
335
336# indicate whether PIE is set
337has_pie() {
338 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
339 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
340 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
341 # test PIC while waiting for specs to be updated to generate __PIE__
342 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
343 return 1
344}
345
346# indicate whether code for SSP is being generated for all functions
347has_ssp_all() {
348 # note; this matches only -fstack-protector-all
349 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0
350 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0
351 return 1
352}
353
354# indicate whether code for SSP is being generated
355has_ssp() {
356 # note; this matches both -fstack-protector and -fstack-protector-all
357 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
358 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
359 return 1
360}
361
362has_m64() { 544has_m64() {
363 # this doesnt test if the flag is accepted, it tests if the flag 545 # this doesnt test if the flag is accepted, it tests if the flag
364 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 546 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
365 # please dont replace this function with test_flag in some future 547 # please dont replace this function with test_flag in some future
366 # clean-up! 548 # clean-up!
549
367 local temp="$(emktemp)" 550 local temp="$(emktemp)"
368 echo "int main() { return(0); }" > ${temp}.c 551 echo "int main() { return(0); }" > "${temp}".c
369 MY_CC=$(tc-getCC) 552 MY_CC=$(tc-getCC)
370 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 553 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
371 local ret=$? 554 local ret=$?
372 rm -f ${temp}.c 555 rm -f "${temp}".c
373 [ "$ret" != "1" ] && return 0 556 [[ ${ret} != 1 ]] && return 0
374 return 1 557 return 1
375} 558}
376 559
560# @FUNCTION: has_m32
561# @DESCRIPTION:
562# This doesn't test if the flag is accepted, it tests if the flag actually
563# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
564# code is 0, else return code is 1.
377has_m32() { 565has_m32() {
378 # this doesnt test if the flag is accepted, it tests if the flag 566 # this doesnt test if the flag is accepted, it tests if the flag
379 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 567 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
380 # please dont replace this function with test_flag in some future 568 # please dont replace this function with test_flag in some future
381 # clean-up! 569 # clean-up!
382 570
383 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0 571 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
384 572
385 local temp="$(emktemp)" 573 local temp=$(emktemp)
386 echo "int main() { return(0); }" > ${temp}.c 574 echo "int main() { return(0); }" > "${temp}".c
387 MY_CC=$(tc-getCC) 575 MY_CC=$(tc-getCC)
388 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 576 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
389 local ret=$? 577 local ret=$?
390 rm -f ${temp}.c 578 rm -f "${temp}".c
391 [ "$ret" != "1" ] && return 0 579 [[ ${ret} != 1 ]] && return 0
392 return 1 580 return 1
393} 581}
394 582
583# @FUNCTION: replace-sparc64-flags
584# @DESCRIPTION:
585# Sets mcpu to v8 and uses the original value as mtune if none specified.
395replace-sparc64-flags() { 586replace-sparc64-flags() {
396 local SPARC64_CPUS="ultrasparc v9" 587 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
397 588
398 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 589 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
399 for x in ${SPARC64_CPUS}; do 590 for x in ${SPARC64_CPUS}; do
400 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 591 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
401 done 592 done
402 else 593 else
403 for x in ${SPARC64_CPUS}; do 594 for x in ${SPARC64_CPUS}; do
404 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 595 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
405 done 596 done
406 fi 597 fi
407 598
408 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 599 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
409 for x in ${SPARC64_CPUS}; do 600 for x in ${SPARC64_CPUS}; do
410 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 601 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
411 done 602 done
412 else 603 else
413 for x in ${SPARC64_CPUS}; do 604 for x in ${SPARC64_CPUS}; do
414 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 605 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
415 done 606 done
416 fi 607 fi
417 608
418 export CFLAGS CXXFLAGS 609 export CFLAGS CXXFLAGS
419} 610}
420 611
612# @FUNCTION: append-libs
613# @USAGE: <libs>
614# @DESCRIPTION:
615# Add extra <libs> to the current LIBS.
616append-libs() {
617 [[ $# -eq 0 ]] && return 0
618 local flag
619 for flag in "$@"; do
620 [[ ${flag} == -l* ]] && flag=${flag#-l}
621 export LIBS="${LIBS} -l${flag}"
622 done
623
624 return 0
625}
626
627# @FUNCTION: append-ldflags
628# @USAGE: <flags>
629# @DESCRIPTION:
630# Add extra <flags> to the current LDFLAGS.
421append-ldflags() { 631append-ldflags() {
632 [[ $# -eq 0 ]] && return 0
633 local flag
634 for flag in "$@"; do
635 [[ ${flag} == -l* ]] && \
636 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
637 done
638
422 export LDFLAGS="${LDFLAGS} $*" 639 export LDFLAGS="${LDFLAGS} $*"
423 return 0 640 return 0
424} 641}
425 642
643# @FUNCTION: filter-ldflags
644# @USAGE: <flags>
645# @DESCRIPTION:
646# Remove particular <flags> from LDFLAGS. Accepts shell globs.
426filter-ldflags() { 647filter-ldflags() {
427 local x 648 _filter-var LDFLAGS "$@"
428
429 # we do this fancy spacing stuff so as to not filter
430 # out part of a flag ... we want flag atoms ! :D
431 LDFLAGS=" ${LDFLAGS} "
432 for x in "$@" ; do
433 LDFLAGS=${LDFLAGS// ${x} / }
434 done
435 [[ -z ${LDFLAGS// } ]] \
436 && LDFLAGS="" \
437 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
438 export LDFLAGS
439 return 0 649 return 0
440} 650}
441 651
442fstack-flags() { 652# @FUNCTION: raw-ldflags
443 if has_ssp; then 653# @USAGE: [flags]
444 [ -z "`is-flag -fno-stack-protector`" ] && 654# @DESCRIPTION:
445 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 655# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
446 fi 656# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
447 return 0 657# to gcc where it needs the '-Wl,'.
448}
449
450# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
451# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
452# fixes.
453# 658#
454# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 659# If no flags are specified, then default to ${LDFLAGS}.
455gcc2-flags() { 660raw-ldflags() {
456 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then 661 local x input="$@"
457 CFLAGS=${CFLAGS//-mtune=/-mcpu=} 662 [[ -z ${input} ]] && input=${LDFLAGS}
458 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=} 663 set --
664 for x in ${input} ; do
665 x=${x#-Wl,}
666 set -- "$@" ${x//,/ }
667 done
668 echo "$@"
669}
670
671# @FUNCTION: no-as-needed
672# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
673no-as-needed() {
674 case $($(tc-getLD) -v 2>&1 </dev/null) in
675 *GNU*) # GNU ld
676 echo "-Wl,--no-as-needed" ;;
677 esac
678}
679
459 fi 680fi
460
461 replace-cpu-flags k6-{2,3} k6
462 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
463
464 replace-cpu-flags pentium-mmx i586
465 replace-cpu-flags pentium{2,3,4} i686
466
467 replace-cpu-flags ev6{7,8} ev6
468
469 export CFLAGS CXXFLAGS
470}

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