/[gentoo-x86]/eclass/flag-o-matic.eclass
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1# Copyright 1999-2005 Gentoo Foundation 1# Copyright 1999-2008 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 1.104 2006/01/14 10:52:12 kevquinn Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.125 2008/09/14 19:43:41 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()
7inherit eutils toolchain-funcs multilib 13inherit eutils toolchain-funcs multilib
8 14
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 ################ 15################ DEPRECATED functions ################
66# The following are still present to avoid breaking existing 16# The following are still present to avoid breaking existing
67# code more than necessary; however they are deprecated. Please 17# code more than necessary; however they are deprecated. Please
68# use gcc-specs-* from toolchain-funcs.eclass instead, if you 18# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# need to know which hardened techs are active in the compiler. 19# need to know which hardened techs are active in the compiler.
70# See bug #100974 20# See bug #100974
71# 21#
72#### has_hardened #### 22# has_hardened
73# Returns true if the compiler has 'Hardened' in its version string, 23# has_pie
74# (note; switched-spec vanilla compilers satisfy this condition) or 24# 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 #### 25# has_ssp_all
86# Returns true if the compiler by default or with current CFLAGS 26# 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 27
28
94# 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
95setup-allowed-flags() { 31setup-allowed-flags() {
96 if [[ -z ${ALLOWED_FLAGS} ]] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
97 export ALLOWED_FLAGS="-pipe" 33 export ALLOWED_FLAGS="-pipe"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
102 export ALLOWED_FLAGS="${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="${ALLOWED_FLAGS} -W* -w"
103 fi 41 fi
104 # allow a bunch of flags that negate features / control ABI 42 # allow a bunch of flags that negate features / control ABI
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking"
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
107 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \ 49 -mieee -mieee-with-inexact -mschedule \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
54 -msecure-plt -D*"
115 55
116 # C[XX]FLAGS that we are think is ok, but needs testing 56 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
117 # NOTE: currently -Os have issues with gcc3 and K6* arch's 57 # NOTE: currently -Os have issues with gcc3 and K6* arch's
118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
119 return 0 59 return 0
120} 60}
121 61
62# inverted filters for hardened compiler. This is trying to unpick
63# the hardened compiler defaults.
64_filter-hardened() {
65 local f
66 for f in "$@" ; do
67 case "${f}" in
68 # Ideally we should only concern ourselves with PIE flags,
69 # not -fPIC or -fpic, but too many places filter -fPIC without
70 # thinking about -fPIE.
71 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
72 gcc-specs-pie || continue
73 is-flagq -nopie || append-flags -nopie;;
74 -fstack-protector)
75 gcc-specs-ssp || continue
76 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
77 -fstack-protector-all)
78 gcc-specs-ssp-to-all || continue
79 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
80 esac
81 done
82}
83
84# Remove occurrences of strings from variable given in $1
85# Strings removed are matched as globs, so for example
86# '-O*' would remove -O1, -O2 etc.
87_filter-var() {
88 local f x VAR VAL
89 declare -a new
90
91 VAR=$1
92 shift
93 eval VAL=\${${VAR}}
94 for f in ${VAL}; do
95 for x in "$@"; do
96 # Note this should work with globs like -O*
97 [[ ${f} == ${x} ]] && continue 2
98 done
99 eval new\[\${\#new\[@]}]=\${f}
100 done
101 eval export ${VAR}=\${new\[*]}
102}
103
104# @FUNCTION: filter-flags
105# @USAGE: <flags>
106# @DESCRIPTION:
107# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
122filter-flags() { 108filter-flags() {
123 local x f fset 109 _filter-hardened "$@"
124 declare -a new_CFLAGS new_CXXFLAGS 110 _filter-var CFLAGS "$@"
125 111 _filter-var CPPFLAGS "$@"
126 for x in "$@" ; do 112 _filter-var CXXFLAGS "$@"
127 case "${x}" in 113 _filter-var FFLAGS "$@"
128 -fPIC|-fpic|-fPIE|-fpie|-pie) 114 _filter-var FCFLAGS "$@"
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 0 115 return 0
151} 116}
152 117
118# @FUNCTION: filter-lfs-flags
119# @DESCRIPTION:
120# Remove flags that enable Large File Support.
153filter-lfs-flags() { 121filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 122 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
155 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 123 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
156} 124}
157 125
126# @FUNCTION: append-cppflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Add extra <flags> to the current CPPFLAGS.
130append-cppflags() {
131 [[ -z $* ]] && return 0
132 export CPPFLAGS="${CPPFLAGS} $*"
133 return 0
134}
135
136# @FUNCTION: append-fflags
137# @USAGE: <flags>
138# @DESCRIPTION:
139# Add extra <flags> to the current {F,FC}FLAGS.
140append-fflags() {
141 [[ -z $* ]] && return 0
142 export FFLAGS="${FFLAGS} $*"
143 export FCFLAGS="${FCFLAGS} $*"
144 return 0
145}
146
147# @FUNCTION: append-lfs-flags
148# @DESCRIPTION:
149# Add flags that enable Large File Support.
158append-lfs-flags() { 150append-lfs-flags() {
159 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 151 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
160 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 152 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
161} 153}
162 154
155# @FUNCTION: append-flags
156# @USAGE: <flags>
157# @DESCRIPTION:
158# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
163append-flags() { 159append-flags() {
164 [[ -z $* ]] && return 0 160 [[ -z $* ]] && return 0
165 export CFLAGS="${CFLAGS} $*" 161 export CFLAGS="${CFLAGS} $*"
166 export CXXFLAGS="${CXXFLAGS} $*" 162 export CXXFLAGS="${CXXFLAGS} $*"
167 [ -n "`is-flag -fno-stack-protector`" -o \ 163 export FFLAGS="${FFLAGS} $*"
168 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 164 export FCFLAGS="${FCFLAGS} $*"
169 return 0 165 return 0
170} 166}
171 167
168# @FUNCTION: replace-flags
169# @USAGE: <old> <new>
170# @DESCRIPTION:
171# Replace the <old> flag with <new>. Accepts shell globs for <old>.
172replace-flags() { 172replace-flags() {
173 [[ $# != 2 ]] \ 173 [[ $# != 2 ]] \
174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
175 && die "replace-flags takes 2 arguments, not $#" 175 && die "replace-flags takes 2 arguments, not $#"
176 176
177 local f fset 177 local f fset
178 declare -a new_CFLAGS new_CXXFLAGS 178 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
179 179
180 for fset in CFLAGS CXXFLAGS; do 180 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
181 # Looping over the flags instead of using a global 181 # Looping over the flags instead of using a global
182 # substitution ensures that we're working with flag atoms. 182 # substitution ensures that we're working with flag atoms.
183 # Otherwise globs like -O* have the potential to wipe out the 183 # Otherwise globs like -O* have the potential to wipe out the
184 # list of flags. 184 # list of flags.
185 for f in ${!fset}; do 185 for f in ${!fset}; do
191 done 191 done
192 192
193 return 0 193 return 0
194} 194}
195 195
196# @FUNCTION: replace-cpu-flags
197# @USAGE: <old> <new>
198# @DESCRIPTION:
199# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
200# with flags that select the <new> cpu. Accepts shell globs for <old>.
196replace-cpu-flags() { 201replace-cpu-flags() {
197 local newcpu="$#" ; newcpu="${!newcpu}" 202 local newcpu="$#" ; newcpu="${!newcpu}"
198 while [ $# -gt 1 ] ; do 203 while [ $# -gt 1 ] ; do
199 # quote to make sure that no globbing is done (particularly on 204 # quote to make sure that no globbing is done (particularly on
200 # ${oldcpu} prior to calling replace-flags 205 # ${oldcpu}) prior to calling replace-flags
201 replace-flags "-march=${1}" "-march=${newcpu}" 206 replace-flags "-march=${1}" "-march=${newcpu}"
202 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 207 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
203 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 208 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
204 shift 209 shift
205 done 210 done
206 return 0 211 return 0
207} 212}
208 213
214_is_flagq() {
215 local x
216 for x in ${!1} ; do
217 [[ ${x} == $2 ]] && return 0
218 done
219 return 1
220}
221
222# @FUNCTION: is-flagq
223# @USAGE: <flag>
224# @DESCRIPTION:
225# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
226is-flagq() {
227 [[ -n $2 ]] && die "Usage: is-flag <flag>"
228 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
229}
230
231# @FUNCTION: is-flag
232# @USAGE: <flag>
233# @DESCRIPTION:
234# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
209is-flag() { 235is-flag() {
210 local x 236 is-flagq "$@" && 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} 237}
221 238
239# @FUNCTION: is-ldflagq
240# @USAGE: <flag>
241# @DESCRIPTION:
242# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
243is-ldflagq() {
244 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
245 _is_flagq LDFLAGS $1
246}
247
248# @FUNCTION: is-ldflag
249# @USAGE: <flag>
250# @DESCRIPTION:
251# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
252is-ldflag() {
253 is-ldflagq "$@" && echo true
254}
255
256# @FUNCTION: filter-mfpmath
257# @USAGE: <math types>
258# @DESCRIPTION:
259# Remove specified math types from the fpmath flag. For example, if the user
260# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
261# -mfpmath=386.
222filter-mfpmath() { 262filter-mfpmath() {
223 local orig_mfpmath new_math prune_math 263 local orig_mfpmath new_math prune_math
224 264
225 # save the original -mfpmath flag 265 # save the original -mfpmath flag
226 orig_mfpmath="`get-flag -mfpmath`" 266 orig_mfpmath=$(get-flag -mfpmath)
227 # get the value of the current -mfpmath flag 267 # get the value of the current -mfpmath flag
228 new_math=" `get-flag mfpmath | tr , ' '` " 268 new_math=$(get-flag mfpmath)
269 new_math=" ${new_math//,/ } "
229 # figure out which math values are to be removed 270 # figure out which math values are to be removed
230 prune_math="" 271 prune_math=""
231 for prune_math in "$@" ; do 272 for prune_math in "$@" ; do
232 new_math="${new_math/ ${prune_math} / }" 273 new_math=${new_math/ ${prune_math} / }
233 done 274 done
234 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 275 new_math=$(echo ${new_math})
276 new_math=${new_math// /,}
235 277
236 if [ -z "${new_math}" ] ; then 278 if [[ -z ${new_math} ]] ; then
237 # if we're removing all user specified math values are 279 # if we're removing all user specified math values are
238 # slated for removal, then we just filter the flag 280 # slated for removal, then we just filter the flag
239 filter-flags ${orig_mfpmath} 281 filter-flags ${orig_mfpmath}
240 else 282 else
241 # if we only want to filter some of the user specified 283 # if we only want to filter some of the user specified
243 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 285 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
244 fi 286 fi
245 return 0 287 return 0
246} 288}
247 289
290# @FUNCTION: strip-flags
291# @DESCRIPTION:
292# Strip C[XX]FLAGS of everything except known good/safe flags.
248strip-flags() { 293strip-flags() {
249 local x y flag NEW_CFLAGS NEW_CXXFLAGS 294 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
250 295
251 setup-allowed-flags 296 setup-allowed-flags
252 297
253 local NEW_CFLAGS="" 298 local NEW_CFLAGS=""
254 local NEW_CXXFLAGS="" 299 local NEW_CXXFLAGS=""
300 local NEW_FFLAGS=""
301 local NEW_FCFLAGS=""
255 302
256 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 303 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
257 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 304 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
258 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 305 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
259 fi 306 fi
278 break 325 break
279 fi 326 fi
280 done 327 done
281 done 328 done
282 329
330 for x in ${FFLAGS}; do
331 for y in ${ALLOWED_FLAGS}; do
332 flag=${x%%=*}
333 if [ "${flag%%${y}}" = "" ] ; then
334 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
335 break
336 fi
337 done
338 done
339
340 for x in ${FCFLAGS}; do
341 for y in ${ALLOWED_FLAGS}; do
342 flag=${x%%=*}
343 if [ "${flag%%${y}}" = "" ] ; then
344 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
345 break
346 fi
347 done
348 done
349
283 # In case we filtered out all optimization flags fallback to -O2 350 # In case we filtered out all optimization flags fallback to -O2
284 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 351 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
285 NEW_CFLAGS="${NEW_CFLAGS} -O2" 352 NEW_CFLAGS="${NEW_CFLAGS} -O2"
286 fi 353 fi
287 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 354 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
288 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 355 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
289 fi 356 fi
357 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
358 NEW_FFLAGS="${NEW_FFLAGS} -O2"
359 fi
360 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
361 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
362 fi
290 363
291 set +f # re-enable pathname expansion 364 set +f # re-enable pathname expansion
292 365
293 export CFLAGS="${NEW_CFLAGS}" 366 export CFLAGS="${NEW_CFLAGS}"
294 export CXXFLAGS="${NEW_CXXFLAGS}" 367 export CXXFLAGS="${NEW_CXXFLAGS}"
368 export FFLAGS="${NEW_FFLAGS}"
369 export FCFLAGS="${NEW_FCFLAGS}"
295 return 0 370 return 0
296} 371}
297 372
298test-flag-PROG() { 373test-flag-PROG() {
299 local comp=$1 374 local comp=$1
305 local PROG=$(tc-get${comp}) 380 local PROG=$(tc-get${comp})
306 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 381 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
307 > /dev/null 2>&1 382 > /dev/null 2>&1
308} 383}
309 384
310# Returns true if C compiler support given flag 385# @FUNCTION: test-flag-CC
386# @USAGE: <flag>
387# @DESCRIPTION:
388# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
311test-flag-CC() { test-flag-PROG "CC" "$1"; } 389test-flag-CC() { test-flag-PROG "CC" "$1"; }
312 390
313# Returns true if C++ compiler support given flag 391# @FUNCTION: test-flag-CXX
392# @USAGE: <flag>
393# @DESCRIPTION:
394# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
314test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 395test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
396
397# @FUNCTION: test-flag-F77
398# @USAGE: <flag>
399# @DESCRIPTION:
400# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
401test-flag-F77() { test-flag-PROG "F77" "$1"; }
402
403# @FUNCTION: test-flag-FC
404# @USAGE: <flag>
405# @DESCRIPTION:
406# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
407test-flag-FC() { test-flag-PROG "FC" "$1"; }
315 408
316test-flags-PROG() { 409test-flags-PROG() {
317 local comp=$1 410 local comp=$1
318 local flags 411 local flags
319 local x 412 local x
320 413
321 shift 414 shift
322 415
323 [[ -z ${comp} ]] && \ 416 [[ -z ${comp} ]] && return 1
324 return 1
325 417
418 x=""
326 for x in "$@" ; do 419 for x in "$@" ; do
327 test-flag-${comp} "${x}" && flags="${flags} ${x}" 420 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
328 done 421 done
329 422
330 echo "${flags}" 423 echo "${flags}"
331 424
332 # Just bail if we dont have any flags 425 # Just bail if we dont have any flags
333 [[ -n ${flags} ]] 426 [[ -n ${flags} ]]
334} 427}
335 428
336# Returns (echo's) the given flags supported by the C compiler 429# @FUNCTION: test-flags-CC
430# @USAGE: <flags>
431# @DESCRIPTION:
432# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
337test-flags-CC() { test-flags-PROG "CC" "$@"; } 433test-flags-CC() { test-flags-PROG "CC" "$@"; }
338 434
339# Returns (echo's) the given flags supported by the C++ compiler 435# @FUNCTION: test-flags-CXX
436# @USAGE: <flags>
437# @DESCRIPTION:
438# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
340test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 439test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
341 440
441# @FUNCTION: test-flags-F77
442# @USAGE: <flags>
443# @DESCRIPTION:
444# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
445test-flags-F77() { test-flags-PROG "F77" "$@"; }
446
447# @FUNCTION: test-flags-FC
448# @USAGE: <flags>
449# @DESCRIPTION:
450# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
451test-flags-FC() { test-flags-PROG "FC" "$@"; }
452
453# @FUNCTION: test-flags
454# @USAGE: <flags>
455# @DESCRIPTION:
342# Short-hand that should hopefully work for both C and C++ compiler, but 456# Short-hand that should hopefully work for both C and C++ compiler, but
343# its really only present due to the append-flags() abomination. 457# its really only present due to the append-flags() abomination.
344test-flags() { test-flags-CC "$@"; } 458test-flags() { test-flags-CC "$@"; }
345 459
346# Deprecated, use test-flags() 460# @FUNCTION: test_flag
461# @DESCRIPTION:
462# DEPRICIATED, use test-flags()
347test_flag() { 463test_flag() {
348 ewarn "test_flag: deprecated, please use test-flags()!" >&2 464 ewarn "test_flag: deprecated, please use test-flags()!" >&2
349 465
350 test-flags-CC "$@" 466 test-flags-CC "$@"
351} 467}
352 468
469# @FUNCTION: test_version_info
470# @USAGE: <version>
471# @DESCRIPTION:
472# Returns shell true if the current C compiler version matches <version>, else returns shell false.
473# Accepts shell globs.
353test_version_info() { 474test_version_info() {
354 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 475 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
355 return 0 476 return 0
356 else 477 else
357 return 1 478 return 1
358 fi 479 fi
359} 480}
360 481
482# @FUNCTION: strip-unsupported-flags
483# @DESCRIPTION:
484# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
361strip-unsupported-flags() { 485strip-unsupported-flags() {
362 local x NEW_CFLAGS NEW_CXXFLAGS 486 export CFLAGS=$(test-flags-CC ${CFLAGS})
363 487 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
364 for x in ${CFLAGS} ; do 488 export FFLAGS=$(test-flags-F77 ${FFLAGS})
365 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})" 489 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
366 done
367 for x in ${CXXFLAGS} ; do
368 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
369 done
370
371 export CFLAGS=${NEW_CFLAGS}
372 export CXXFLAGS=${NEW_CXXFLAGS}
373} 490}
374 491
492# @FUNCTION: get-flag
493# @USAGE: <flag>
494# @DESCRIPTION:
495# Find and echo the value for a particular flag. Accepts shell globs.
375get-flag() { 496get-flag() {
376 local f findflag="$1" 497 local f findflag="$1"
377 498
378 # this code looks a little flaky but seems to work for 499 # this code looks a little flaky but seems to work for
379 # everything we want ... 500 # everything we want ...
380 # for example, if CFLAGS="-march=i686": 501 # for example, if CFLAGS="-march=i686":
381 # `get-flag -march` == "-march=i686" 502 # `get-flag -march` == "-march=i686"
382 # `get-flag march` == "i686" 503 # `get-flag march` == "i686"
383 for f in ${CFLAGS} ${CXXFLAGS} ; do 504 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
384 if [ "${f/${findflag}}" != "${f}" ] ; then 505 if [ "${f/${findflag}}" != "${f}" ] ; then
385 printf "%s\n" "${f/-${findflag}=}" 506 printf "%s\n" "${f/-${findflag}=}"
386 return 0 507 return 0
387 fi 508 fi
388 done 509 done
389 return 1 510 return 1
390} 511}
391 512
513# @FUNCTION: has_hardened
514# @DESCRIPTION:
392# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 515# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
393has_hardened() { 516has_hardened() {
394 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 517 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
395 518
396 test_version_info Hardened && return 0 519 test_version_info Hardened && return 0
397 # The specs file wont exist unless gcc has GCC_SPECS support 520 # The specs file wont exist unless gcc has GCC_SPECS support
398 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 521 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
399} 522}
400 523
524# @FUNCTION: has_pic
525# @DESCRIPTION:
401# DEPRECATED - use gcc-specs-pie from toolchain-funcs 526# DEPRECATED - use gcc-specs-pie from toolchain-funcs
402# indicate whether PIC is set 527# indicate whether PIC is set
403has_pic() { 528has_pic() {
404 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 529 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
405 530
406 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 531 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
407 ${CFLAGS/-fpic} != ${CFLAGS} || \ 532 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
408 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]] 533 gcc-specs-pie
409} 534}
410 535
536# @FUNCTION: has_pie
537# @DESCRIPTION:
411# DEPRECATED - use gcc-specs-pie from toolchain-funcs 538# DEPRECATED - use gcc-specs-pie from toolchain-funcs
412# indicate whether PIE is set 539# indicate whether PIE is set
413has_pie() { 540has_pie() {
414 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 541 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
415 542
416 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 543 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
417 ${CFLAGS/-fpie} != ${CFLAGS} || \ 544 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
418 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__) || \ 545 gcc-specs-pie
419 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
420 # test PIC while waiting for specs to be updated to generate __PIE__
421} 546}
422 547
548# @FUNCTION: has_ssp_all
549# @DESCRIPTION:
423# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 550# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
424# indicate whether code for SSP is being generated for all functions 551# indicate whether code for SSP is being generated for all functions
425has_ssp_all() { 552has_ssp_all() {
426 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 553 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
427 554
428 # note; this matches only -fstack-protector-all 555 # note; this matches only -fstack-protector-all
429 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 556 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
430 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 557 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
431 gcc-specs-ssp 558 gcc-specs-ssp-all
432} 559}
433 560
561# @FUNCTION: has_ssp
562# @DESCRIPTION:
434# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 563# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
435# indicate whether code for SSP is being generated 564# indicate whether code for SSP is being generated
436has_ssp() { 565has_ssp() {
437 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 566 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
438 567
440 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 569 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
441 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 570 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
442 gcc-specs-ssp 571 gcc-specs-ssp
443} 572}
444 573
574# @FUNCTION: has_m64
575# @DESCRIPTION:
576# This doesn't test if the flag is accepted, it tests if the flag actually
577# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
578# return code is 0, else the return code is 1.
445has_m64() { 579has_m64() {
446 # this doesnt test if the flag is accepted, it tests if the flag 580 # this doesnt test if the flag is accepted, it tests if the flag
447 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 581 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
448 # please dont replace this function with test_flag in some future 582 # please dont replace this function with test_flag in some future
449 # clean-up! 583 # clean-up!
456 rm -f "${temp}".c 590 rm -f "${temp}".c
457 [[ ${ret} != 1 ]] && return 0 591 [[ ${ret} != 1 ]] && return 0
458 return 1 592 return 1
459} 593}
460 594
595# @FUNCTION: has_m32
596# @DESCRIPTION:
597# This doesn't test if the flag is accepted, it tests if the flag actually
598# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
599# code is 0, else return code is 1.
461has_m32() { 600has_m32() {
462 # this doesnt test if the flag is accepted, it tests if the flag 601 # this doesnt test if the flag is accepted, it tests if the flag
463 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 602 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
464 # please dont replace this function with test_flag in some future 603 # please dont replace this function with test_flag in some future
465 # clean-up! 604 # clean-up!
474 rm -f "${temp}".c 613 rm -f "${temp}".c
475 [[ ${ret} != 1 ]] && return 0 614 [[ ${ret} != 1 ]] && return 0
476 return 1 615 return 1
477} 616}
478 617
618# @FUNCTION: replace-sparc64-flags
619# @DESCRIPTION:
620# Sets mcpu to v8 and uses the original value as mtune if none specified.
479replace-sparc64-flags() { 621replace-sparc64-flags() {
480 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 622 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
481 623
482 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 624 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
483 for x in ${SPARC64_CPUS}; do 625 for x in ${SPARC64_CPUS}; do
484 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 626 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
485 done 627 done
486 else 628 else
487 for x in ${SPARC64_CPUS}; do 629 for x in ${SPARC64_CPUS}; do
488 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 630 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
489 done 631 done
490 fi 632 fi
491 633
492 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 634 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
493 for x in ${SPARC64_CPUS}; do 635 for x in ${SPARC64_CPUS}; do
494 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 636 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
495 done 637 done
496 else 638 else
497 for x in ${SPARC64_CPUS}; do 639 for x in ${SPARC64_CPUS}; do
498 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 640 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
499 done 641 done
500 fi 642 fi
501 643
502 export CFLAGS CXXFLAGS 644 export CFLAGS CXXFLAGS
503} 645}
504 646
647# @FUNCTION: append-ldflags
648# @USAGE: <flags>
649# @DESCRIPTION:
650# Add extra <flags> to the current LDFLAGS.
505append-ldflags() { 651append-ldflags() {
652 [[ -z $* ]] && return 0
653 local flag
654 for flag in "$@"; do
655 [[ ${flag} == -l* ]] && \
656 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
657 done
658
506 export LDFLAGS="${LDFLAGS} $*" 659 export LDFLAGS="${LDFLAGS} $*"
507 return 0 660 return 0
508} 661}
509 662
663# @FUNCTION: filter-ldflags
664# @USAGE: <flags>
665# @DESCRIPTION:
666# Remove particular <flags> from LDFLAGS. Accepts shell globs.
510filter-ldflags() { 667filter-ldflags() {
511 local x 668 _filter-var LDFLAGS "$@"
512
513 # we do this fancy spacing stuff so as to not filter
514 # out part of a flag ... we want flag atoms ! :D
515 LDFLAGS=" ${LDFLAGS} "
516 for x in "$@" ; do
517 LDFLAGS=${LDFLAGS// ${x} / }
518 done
519 [[ -z ${LDFLAGS// } ]] \
520 && LDFLAGS="" \
521 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
522 export LDFLAGS
523 return 0 669 return 0
524} 670}
525 671
672# @FUNCTION: raw-ldflags
673# @USAGE: <flags>
674# @DESCRIPTION:
526# Turn C style ldflags (-Wl,-foo) into straight ldflags 675# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
676# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
677# to gcc where it needs the '-Wl,'.
527raw-ldflags() { 678raw-ldflags() {
528 local x input="$@" 679 local x input="$@"
529 [[ -z ${input} ]] && input=${LDFLAGS} 680 [[ -z ${input} ]] && input=${LDFLAGS}
530 set -- 681 set --
531 for x in ${input} ; do 682 for x in ${input} ; do
533 set -- "$@" ${x//,/ } 684 set -- "$@" ${x//,/ }
534 done 685 done
535 echo "$@" 686 echo "$@"
536} 687}
537 688
538fstack-flags() { 689# @FUNCTION: bindnow-flags
539 if gcc-specs-ssp; then 690# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
540 [ -z "`is-flag -fno-stack-protector`" ] && 691# @DESCRIPTION:
541 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
542 fi
543 return 0
544}
545
546# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
547# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
548# fixes.
549#
550# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
551gcc2-flags() {
552 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
553 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
554 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
555 fi
556
557 replace-cpu-flags k6-{2,3} k6
558 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
559
560 replace-cpu-flags pentium-mmx i586
561 replace-cpu-flags pentium{2,3,4} i686
562
563 replace-cpu-flags ev6{7,8} ev6
564
565 export CFLAGS CXXFLAGS
566}
567
568# Gets the flags needed for "NOW" binding 692# DEPRECATED - Gets the flags needed for "NOW" binding
569bindnow-flags() { 693bindnow-flags() {
694 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" >&2
695
570 case $($(tc-getLD) -v 2>&1 </dev/null) in 696 case $($(tc-getLD) -v 2>&1 </dev/null) in
571 *GNU* | *'with BFD'*) # GNU ld 697 *GNU* | *'with BFD'*) # GNU ld
572 echo "-Wl,-z,now" ;; 698 echo "-Wl,-z,now" ;;
573 *Apple*) # Darwin ld 699 *Apple*) # Darwin ld
574 echo "-bind_at_load" ;; 700 echo "-bind_at_load" ;;
579 echo "-Wl,-z,now" ;; 705 echo "-Wl,-z,now" ;;
580 esac 706 esac
581 ;; 707 ;;
582 esac 708 esac
583} 709}
710
711
712# Some tests for when we screw with things and want to make
713# sure we didn't break anything
714#TESTS() {
715# CFLAGS="-a -b -c=1"
716# CXXFLAGS="-x -y -z=2"
717# LDFLAGS="-l -m -n=3"
718#
719# die() { exit 1; }
720# (is-flag 1 2 3) && die
721# (is-ldflag 1 2 3) && die
722#
723# is-flagq -l && die
724# is-ldflagq -a && die
725# is-flagq -a || die
726# is-flagq -x || die
727# is-ldflagq -n=* || die
728# is-ldflagq -n && die
729#
730# strip-unsupported-flags
731# [[ ${CFLAGS} == "-c=1" ]] || die
732# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
733#
734# echo "All tests pass"
735#}
736#TESTS

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