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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 1.94 2005/10/09 22:28:35 flameeyes 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
9#
10#### filter-flags <flags> ####
11# Remove particular flags from C[XX]FLAGS
12# Matches only complete flags
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#### bindnow-flags ####
63# Returns the flags to enable "now" binding in the current selected linker.
64#
65################ DEPRECATED functions ################ 18################ DEPRECATED functions ################
66# The following are still present to avoid breaking existing 19# The following are still present to avoid breaking existing
67# code more than necessary; however they are deprecated. Please 20# code more than necessary; however they are deprecated. Please
68# use gcc-specs-* from toolchain-funcs.eclass instead, if you 21# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# need to know which hardened techs are active in the compiler. 22# need to know which hardened techs are active in the compiler.
70# See bug #100974 23# See bug #100974
71# 24#
72#### has_hardened #### 25# has_hardened
73# Returns true if the compiler has 'Hardened' in its version string, 26# has_pie
74# (note; switched-spec vanilla compilers satisfy this condition) or 27# has_pic
75# the specs file name contains 'hardened'.
76#
77#### has_pie ####
78# Returns true if the compiler by default or with current CFLAGS
79# builds position-independent code.
80#
81#### has_pic ####
82# Returns true if the compiler by default or with current CFLAGS
83# builds position-independent code.
84#
85#### has_ssp_all #### 28# has_ssp_all
86# Returns true if the compiler by default or with current CFLAGS 29# has_ssp
87# generates stack smash protections for all functions
88#
89#### has_ssp ####
90# Returns true if the compiler by default or with current CFLAGS
91# generates stack smash protections for most vulnerable functions
92#
93 30
31
94# 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
95setup-allowed-flags() { 34setup-allowed-flags() {
96 if [[ -z ${ALLOWED_FLAGS} ]] ; then
97 export ALLOWED_FLAGS="-pipe" 35 ALLOWED_FLAGS="-pipe"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 36 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 37 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 38 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 39 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
102 export ALLOWED_FLAGS="${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+"
103 fi 41 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
42 ALLOWED_FLAGS+=" -W* -w"
43
104 # allow a bunch of flags that negate features / control ABI 44 # allow a bunch of flags that negate features / control ABI
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 45 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
46 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
47 -fno-omit-frame-pointer"
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 48 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
107 -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 \
108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 51 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 52 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \ 53 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 54 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 55 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 56 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 57 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
115 58
116 # C[XX]FLAGS that we are think is ok, but needs testing 59 # 4.5
117 # NOTE: currently -Os have issues with gcc3 and K6* arch's 60 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 61 # 4.6
119 return 0 62 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
120}
121 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.
122filter-flags() { 117filter-flags() {
123 local x f fset 118 _filter-hardened "$@"
124 declare -a new_CFLAGS new_CXXFLAGS 119 _filter-var CFLAGS "$@"
125 120 _filter-var CPPFLAGS "$@"
126 for x in "$@" ; do 121 _filter-var CXXFLAGS "$@"
127 case "${x}" in 122 _filter-var FFLAGS "$@"
128 -fPIC|-fpic|-fPIE|-fpie|-pie) 123 _filter-var FCFLAGS "$@"
129 append-flags `test_flag -fno-pie`;;
130 -fstack-protector|-fstack-protector-all)
131 fstack-flags;;
132 esac
133 done
134
135 for fset in CFLAGS CXXFLAGS; do
136 # Looping over the flags instead of using a global
137 # substitution ensures that we're working with flag atoms.
138 # Otherwise globs like -O* have the potential to wipe out the
139 # list of flags.
140 for f in ${!fset}; do
141 for x in "$@"; do
142 # Note this should work with globs like -O*
143 [[ ${f} == ${x} ]] && continue 2
144 done
145 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
146 done
147 eval export ${fset}=\${new_${fset}\[*]}
148 done
149
150 return 0 124 return 0
151} 125}
152 126
127# @FUNCTION: filter-lfs-flags
128# @DESCRIPTION:
129# Remove flags that enable Large File Support.
153filter-lfs-flags() { 130filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 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)
155 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
156} 137}
157 138
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.
158append-lfs-flags() { 183append-lfs-flags() {
159 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 184 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
185 # see comments in filter-lfs-flags func for meaning of these
160 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
161} 187}
162 188
189# @FUNCTION: append-flags
190# @USAGE: <flags>
191# @DESCRIPTION:
192# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
163append-flags() { 193append-flags() {
164 [[ -z $* ]] && return 0 194 [[ $# -eq 0 ]] && return 0
165 export CFLAGS="${CFLAGS} $*" 195 append-cflags "$@"
166 export CXXFLAGS="${CXXFLAGS} $*" 196 append-cxxflags "$@"
167 [ -n "`is-flag -fno-stack-protector`" -o \ 197 append-fflags "$@"
168 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
169 return 0 198 return 0
170} 199}
171 200
201# @FUNCTION: replace-flags
202# @USAGE: <old> <new>
203# @DESCRIPTION:
204# Replace the <old> flag with <new>. Accepts shell globs for <old>.
172replace-flags() { 205replace-flags() {
173 [[ $# != 2 ]] \ 206 [[ $# != 2 ]] \
174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 207 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
175 && die "replace-flags takes 2 arguments, not $#" 208 && die "replace-flags takes 2 arguments, not $#"
176 209
177 local f fset 210 local f fset
178 declare -a new_CFLAGS new_CXXFLAGS 211 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
179 212
180 for fset in CFLAGS CXXFLAGS; do 213 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
181 # Looping over the flags instead of using a global 214 # Looping over the flags instead of using a global
182 # substitution ensures that we're working with flag atoms. 215 # substitution ensures that we're working with flag atoms.
183 # Otherwise globs like -O* have the potential to wipe out the 216 # Otherwise globs like -O* have the potential to wipe out the
184 # list of flags. 217 # list of flags.
185 for f in ${!fset}; do 218 for f in ${!fset}; do
191 done 224 done
192 225
193 return 0 226 return 0
194} 227}
195 228
229# @FUNCTION: replace-cpu-flags
230# @USAGE: <old> <new>
231# @DESCRIPTION:
232# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
233# with flags that select the <new> cpu. Accepts shell globs for <old>.
196replace-cpu-flags() { 234replace-cpu-flags() {
197 local newcpu="$#" ; newcpu="${!newcpu}" 235 local newcpu="$#" ; newcpu="${!newcpu}"
198 while [ $# -gt 1 ] ; do 236 while [ $# -gt 1 ] ; do
199 # quote to make sure that no globbing is done (particularly on 237 # quote to make sure that no globbing is done (particularly on
200 # ${oldcpu} prior to calling replace-flags 238 # ${oldcpu}) prior to calling replace-flags
201 replace-flags "-march=${1}" "-march=${newcpu}" 239 replace-flags "-march=${1}" "-march=${newcpu}"
202 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 240 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
203 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 241 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
204 shift 242 shift
205 done 243 done
206 return 0 244 return 0
207} 245}
208 246
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 $1
262}
263
264# @FUNCTION: is-flag
265# @USAGE: <flag>
266# @DESCRIPTION:
267# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
209is-flag() { 268is-flag() {
210 local x 269 is-flagq "$@" && echo true
211
212 for x in ${CFLAGS} ${CXXFLAGS} ; do
213 # Note this should work with globs like -mcpu=ultrasparc*
214 if [[ ${x} == ${1} ]]; then
215 echo true
216 return 0
217 fi
218 done
219 return 1
220} 270}
221 271
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.
222filter-mfpmath() { 295filter-mfpmath() {
223 local orig_mfpmath new_math prune_math 296 local orig_mfpmath new_math prune_math
224 297
225 # save the original -mfpmath flag 298 # save the original -mfpmath flag
226 orig_mfpmath="`get-flag -mfpmath`" 299 orig_mfpmath=$(get-flag -mfpmath)
227 # get the value of the current -mfpmath flag 300 # get the value of the current -mfpmath flag
228 new_math=" `get-flag mfpmath | tr , ' '` " 301 new_math=$(get-flag mfpmath)
302 new_math=" ${new_math//,/ } "
229 # figure out which math values are to be removed 303 # figure out which math values are to be removed
230 prune_math="" 304 prune_math=""
231 for prune_math in "$@" ; do 305 for prune_math in "$@" ; do
232 new_math="${new_math/ ${prune_math} / }" 306 new_math=${new_math/ ${prune_math} / }
233 done 307 done
234 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 308 new_math=$(echo ${new_math})
309 new_math=${new_math// /,}
235 310
236 if [ -z "${new_math}" ] ; then 311 if [[ -z ${new_math} ]] ; then
237 # if we're removing all user specified math values are 312 # if we're removing all user specified math values are
238 # slated for removal, then we just filter the flag 313 # slated for removal, then we just filter the flag
239 filter-flags ${orig_mfpmath} 314 filter-flags ${orig_mfpmath}
240 else 315 else
241 # if we only want to filter some of the user specified 316 # if we only want to filter some of the user specified
243 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 318 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
244 fi 319 fi
245 return 0 320 return 0
246} 321}
247 322
323# @FUNCTION: strip-flags
324# @DESCRIPTION:
325# Strip C[XX]FLAGS of everything except known good/safe flags.
248strip-flags() { 326strip-flags() {
249 local x y flag NEW_CFLAGS NEW_CXXFLAGS 327 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
250 328
251 setup-allowed-flags 329 setup-allowed-flags
252 330
253 local NEW_CFLAGS="" 331 local NEW_CFLAGS=""
254 local NEW_CXXFLAGS="" 332 local NEW_CXXFLAGS=""
255 333 local NEW_FFLAGS=""
256 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 334 local NEW_FCFLAGS=""
257 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
258 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
259 fi
260 335
261 set -f # disable pathname expansion 336 set -f # disable pathname expansion
262 337
263 for x in ${CFLAGS}; do 338 for x in ${CFLAGS}; do
264 for y in ${ALLOWED_FLAGS}; do 339 for y in ${ALLOWED_FLAGS}; do
278 break 353 break
279 fi 354 fi
280 done 355 done
281 done 356 done
282 357
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} ${x}"
373 break
374 fi
375 done
376 done
377
283 # In case we filtered out all optimization flags fallback to -O2 378 # In case we filtered out all optimization flags fallback to -O2
284 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 379 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
285 NEW_CFLAGS="${NEW_CFLAGS} -O2" 380 NEW_CFLAGS="${NEW_CFLAGS} -O2"
286 fi 381 fi
287 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 382 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
288 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 383 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
289 fi 384 fi
385 if [ "${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="${NEW_FCFLAGS} -O2"
390 fi
290 391
291 set +f # re-enable pathname expansion 392 set +f # re-enable pathname expansion
292 393
293 export CFLAGS="${NEW_CFLAGS}" 394 export CFLAGS="${NEW_CFLAGS}"
294 export CXXFLAGS="${NEW_CXXFLAGS}" 395 export CXXFLAGS="${NEW_CXXFLAGS}"
295 return 0 396 export FFLAGS="${NEW_FFLAGS}"
296} 397 export FCFLAGS="${NEW_FCFLAGS}"
297
298test_flag() {
299 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
300 printf "%s\n" "$*"
301 return 0 398 return 0
302 fi
303 return 1
304} 399}
305 400
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.
306test_version_info() { 492test_version_info() {
307 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 493 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
308 return 0 494 return 0
309 else 495 else
310 return 1 496 return 1
311 fi 497 fi
312} 498}
313 499
500# @FUNCTION: strip-unsupported-flags
501# @DESCRIPTION:
502# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
314strip-unsupported-flags() { 503strip-unsupported-flags() {
315 local NEW_CFLAGS NEW_CXXFLAGS 504 export CFLAGS=$(test-flags-CC ${CFLAGS})
316 505 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
317 for x in ${CFLAGS} ; do 506 export FFLAGS=$(test-flags-F77 ${FFLAGS})
318 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 507 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
319 done
320 for x in ${CXXFLAGS} ; do
321 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
322 done
323
324 export CFLAGS="${NEW_CFLAGS}"
325 export CXXFLAGS="${NEW_CXXFLAGS}"
326} 508}
327 509
510# @FUNCTION: get-flag
511# @USAGE: <flag>
512# @DESCRIPTION:
513# Find and echo the value for a particular flag. Accepts shell globs.
328get-flag() { 514get-flag() {
329 local f findflag="$1" 515 local f findflag="$1"
330 516
331 # this code looks a little flaky but seems to work for 517 # this code looks a little flaky but seems to work for
332 # everything we want ... 518 # everything we want ...
333 # for example, if CFLAGS="-march=i686": 519 # for example, if CFLAGS="-march=i686":
334 # `get-flag -march` == "-march=i686" 520 # `get-flag -march` == "-march=i686"
335 # `get-flag march` == "i686" 521 # `get-flag march` == "i686"
336 for f in ${CFLAGS} ${CXXFLAGS} ; do 522 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
337 if [ "${f/${findflag}}" != "${f}" ] ; then 523 if [ "${f/${findflag}}" != "${f}" ] ; then
338 printf "%s\n" "${f/-${findflag}=}" 524 printf "%s\n" "${f/-${findflag}=}"
339 return 0 525 return 0
340 fi 526 fi
341 done 527 done
342 return 1 528 return 1
343} 529}
344 530
345# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 531# DEAD FUNCS. Remove by Dec 2011.
346has_hardened() { 532test_flag() { die "$0: deprecated, please use test-flags()!" ; }
347 test_version_info Hardened && return 0 533has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
348 # the specs file wont exist unless gcc has GCC_SPECS support 534has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
349 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 535has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
350 return 0 536has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
351 return 1 537has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
352}
353 538
354# DEPRECATED - use gcc-specs-pie from toolchain-funcs 539# @FUNCTION: has_m64
355# indicate whether PIC is set 540# @DESCRIPTION:
356has_pic() { 541# This doesn't test if the flag is accepted, it tests if the flag actually
357 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 542# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
358 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 543# return code is 0, else the return code is 1.
359 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
360 return 1
361}
362
363# DEPRECATED - use gcc-specs-pie from toolchain-funcs
364# indicate whether PIE is set
365has_pie() {
366 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
367 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
368 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
369 # test PIC while waiting for specs to be updated to generate __PIE__
370 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
371 return 1
372}
373
374# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
375# indicate whether code for SSP is being generated for all functions
376has_ssp_all() {
377 # note; this matches only -fstack-protector-all
378 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0
379 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0
380 gcc-specs-ssp && return 0
381 return 1
382}
383
384# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
385# indicate whether code for SSP is being generated
386has_ssp() {
387 # note; this matches both -fstack-protector and -fstack-protector-all
388 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
389 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
390 gcc-specs-ssp && return 0
391 return 1
392}
393
394has_m64() { 544has_m64() {
395 # this doesnt test if the flag is accepted, it tests if the flag 545 # this doesnt test if the flag is accepted, it tests if the flag
396 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 546 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
397 # please dont replace this function with test_flag in some future 547 # please dont replace this function with test_flag in some future
398 # clean-up! 548 # clean-up!
549
399 local temp="$(emktemp)" 550 local temp="$(emktemp)"
400 echo "int main() { return(0); }" > ${temp}.c 551 echo "int main() { return(0); }" > "${temp}".c
401 MY_CC=$(tc-getCC) 552 MY_CC=$(tc-getCC)
402 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 553 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
403 local ret=$? 554 local ret=$?
404 rm -f ${temp}.c 555 rm -f "${temp}".c
405 [ "$ret" != "1" ] && return 0 556 [[ ${ret} != 1 ]] && return 0
406 return 1 557 return 1
407} 558}
408 559
560# @FUNCTION: has_m32
561# @DESCRIPTION:
562# This doesn't test if the flag is accepted, it tests if the flag actually
563# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
564# code is 0, else return code is 1.
409has_m32() { 565has_m32() {
410 # this doesnt test if the flag is accepted, it tests if the flag 566 # this doesnt test if the flag is accepted, it tests if the flag
411 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 567 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
412 # please dont replace this function with test_flag in some future 568 # please dont replace this function with test_flag in some future
413 # clean-up! 569 # clean-up!
414 570
415 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0 571 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
416 572
417 local temp="$(emktemp)" 573 local temp=$(emktemp)
418 echo "int main() { return(0); }" > ${temp}.c 574 echo "int main() { return(0); }" > "${temp}".c
419 MY_CC=$(tc-getCC) 575 MY_CC=$(tc-getCC)
420 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 576 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
421 local ret=$? 577 local ret=$?
422 rm -f ${temp}.c 578 rm -f "${temp}".c
423 [ "$ret" != "1" ] && return 0 579 [[ ${ret} != 1 ]] && return 0
424 return 1 580 return 1
425} 581}
426 582
583# @FUNCTION: replace-sparc64-flags
584# @DESCRIPTION:
585# Sets mcpu to v8 and uses the original value as mtune if none specified.
427replace-sparc64-flags() { 586replace-sparc64-flags() {
428 local SPARC64_CPUS="ultrasparc v9" 587 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
429 588
430 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 589 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
431 for x in ${SPARC64_CPUS}; do 590 for x in ${SPARC64_CPUS}; do
432 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 591 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
433 done 592 done
434 else 593 else
435 for x in ${SPARC64_CPUS}; do 594 for x in ${SPARC64_CPUS}; do
436 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 595 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
437 done 596 done
438 fi 597 fi
439 598
440 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 599 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
441 for x in ${SPARC64_CPUS}; do 600 for x in ${SPARC64_CPUS}; do
442 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 601 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
443 done 602 done
444 else 603 else
445 for x in ${SPARC64_CPUS}; do 604 for x in ${SPARC64_CPUS}; do
446 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 605 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
447 done 606 done
448 fi 607 fi
449 608
450 export CFLAGS CXXFLAGS 609 export CFLAGS CXXFLAGS
451} 610}
452 611
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.
453append-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
454 export LDFLAGS="${LDFLAGS} $*" 639 export LDFLAGS="${LDFLAGS} $*"
455 return 0 640 return 0
456} 641}
457 642
643# @FUNCTION: filter-ldflags
644# @USAGE: <flags>
645# @DESCRIPTION:
646# Remove particular <flags> from LDFLAGS. Accepts shell globs.
458filter-ldflags() { 647filter-ldflags() {
459 local x 648 _filter-var LDFLAGS "$@"
460
461 # we do this fancy spacing stuff so as to not filter
462 # out part of a flag ... we want flag atoms ! :D
463 LDFLAGS=" ${LDFLAGS} "
464 for x in "$@" ; do
465 LDFLAGS=${LDFLAGS// ${x} / }
466 done
467 [[ -z ${LDFLAGS// } ]] \
468 && LDFLAGS="" \
469 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
470 export LDFLAGS
471 return 0 649 return 0
472} 650}
473 651
474fstack-flags() { 652# @FUNCTION: raw-ldflags
475 if gcc-specs-ssp; then 653# @USAGE: [flags]
476 [ -z "`is-flag -fno-stack-protector`" ] && 654# @DESCRIPTION:
477 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 655# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
478 fi 656# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
479 return 0 657# to gcc where it needs the '-Wl,'.
480}
481
482# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
483# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
484# fixes.
485# 658#
486# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 659# If no flags are specified, then default to ${LDFLAGS}.
487gcc2-flags() { 660raw-ldflags() {
488 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then 661 local x input="$@"
489 CFLAGS=${CFLAGS//-mtune=/-mcpu=} 662 [[ -z ${input} ]] && input=${LDFLAGS}
490 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=} 663 set --
491 fi 664 for x in ${input} ; do
492 665 x=${x#-Wl,}
493 replace-cpu-flags k6-{2,3} k6 666 set -- "$@" ${x//,/ }
494 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686 667 done
495 668 echo "$@"
496 replace-cpu-flags pentium-mmx i586
497 replace-cpu-flags pentium{2,3,4} i686
498
499 replace-cpu-flags ev6{7,8} ev6
500
501 export CFLAGS CXXFLAGS
502} 669}
503 670
504# Gets the flags needed for "NOW" binding 671# @FUNCTION: no-as-needed
505bindnow-flags() { 672# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
673no-as-needed() {
506 case $($(tc-getLD) -v 2>&1 </dev/null) in 674 case $($(tc-getLD) -v 2>&1 </dev/null) in
507 *GNU* | *'with BFD'*) # GNU ld 675 *GNU*) # GNU ld
508 echo "-Wl,-z,now" ;; 676 echo "-Wl,--no-as-needed" ;;
509 *Apple*) # Darwin ld
510 echo "-bind_at_load" ;;
511 *)
512 # Some linkers just recognize -V instead of -v
513 case $($(tc-getLD) -V 2>&1 </dev/null) in
514 *Solaris*) # Solaris accept almost the same GNU options
515 echo "-Wl,-z,now" ;;
516 esac
517 ;;
518 esac 677 esac
519} 678}
679
680fi

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