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1# Copyright 1999-2005 Gentoo Foundation 1# Copyright 1999-2009 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.87 2005/06/24 22:06:19 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.132 2009/01/21 00:42:20 gengor Exp $
4 4
5ECLASS=flag-o-matic 5# @ECLASS: flag-o-matic.eclass
6INHERITED="$INHERITED $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.
7 12
8# need access to emktemp()
9inherit eutils toolchain-funcs multilib 13inherit eutils toolchain-funcs multilib
10 14
15################ DEPRECATED functions ################
16# The following are still present to avoid breaking existing
17# code more than necessary; however they are deprecated. Please
18# use gcc-specs-* from toolchain-funcs.eclass instead, if you
19# need to know which hardened techs are active in the compiler.
20# See bug #100974
11# 21#
12#### filter-flags <flags> #### 22# has_hardened
13# Remove particular flags from C[XX]FLAGS 23# has_pie
14# Matches only complete flags 24# has_pic
15#
16#### append-flags <flags> ####
17# Add extra flags to your current C[XX]FLAGS
18#
19#### replace-flags <orig.flag> <new.flag> ###
20# Replace a flag by another one
21#
22#### replace-cpu-flags <old.cpus> <new.cpu> ###
23# Replace march/mcpu flags that specify <old.cpus>
24# with flags that specify <new.cpu>
25#
26#### is-flag <flag> ####
27# Returns "true" if flag is set in C[XX]FLAGS
28# Matches only complete a flag
29#
30#### strip-flags ####
31# Strip C[XX]FLAGS of everything except known
32# good options.
33#
34#### strip-unsupported-flags ####
35# Strip C[XX]FLAGS of any flags not supported by
36# installed version of gcc
37#
38#### get-flag <flag> ####
39# Find and echo the value for a particular flag
40#
41#### replace-sparc64-flags ####
42# Sets mcpu to v8 and uses the original value
43# as mtune if none specified.
44#
45#### filter-mfpmath <math types> ####
46# Remove specified math types from the fpmath specification
47# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
48# will leave the user with -mfpmath=386
49#
50#### append-ldflags ####
51# Add extra flags to your current LDFLAGS
52#
53#### filter-ldflags <flags> ####
54# Remove particular flags from LDFLAGS
55# Matches only complete flags
56#
57#### fstack-flags ####
58# hooked function for hardened gcc that appends
59# -fno-stack-protector to {C,CXX,LD}FLAGS
60# when a package is filtering -fstack-protector, -fstack-protector-all
61# notice: modern automatic specs files will also suppress -fstack-protector-all
62# when only -fno-stack-protector is given
63#
64#### has_pic ####
65# Returns true if the compiler by default or with current CFLAGS
66# builds position-independent code.
67#
68#### has_ssp_all #### 25# has_ssp_all
69# Returns true if the compiler by default or with current CFLAGS 26# has_ssp
70# generates stack smash protections for all functions
71#
72#### has_ssp ####
73# Returns true if the compiler by default or with current CFLAGS
74# generates stack smash protections for most vulnerable functions
75#
76 27
28
77# 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
78setup-allowed-flags() { 31setup-allowed-flags() {
79 if [[ -z ${ALLOWED_FLAGS} ]] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
80 export ALLOWED_FLAGS="-pipe" 33 export ALLOWED_FLAGS="-pipe"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
82 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
83 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
84 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
85 export ALLOWED_FLAGS="${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="${ALLOWED_FLAGS} -W* -w"
86 fi 41 fi
87 # allow a bunch of flags that negate features / control ABI 42 # allow a bunch of flags that negate features / control ABI
88 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow"
89 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
90 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
91 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
92 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
49 -mieee -mieee-with-inexact -mschedule \
50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
93 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
94 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
95 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
54 -msecure-plt -m*-toc -D* -U*"
96 55
97 # C[XX]FLAGS that we are think is ok, but needs testing 56 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
98 # NOTE: currently -Os have issues with gcc3 and K6* arch's 57 # NOTE: currently -Os have issues with gcc3 and K6* arch's
99 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
100 return 0 59 return 0
101} 60}
102 61
62# inverted filters for hardened compiler. This is trying to unpick
63# the hardened compiler defaults.
64_filter-hardened() {
65 local f
66 for f in "$@" ; 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 $(test-flags -fno-stack-protector);;
77 -fstack-protector-all)
78 gcc-specs-ssp-to-all || continue
79 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
80 -fno-strict-overflow)
81 gcc-specs-nostrict || continue
82 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
83 esac
84 done
85}
86
87# Remove occurrences of strings from variable given in $1
88# Strings removed are matched as globs, so for example
89# '-O*' would remove -O1, -O2 etc.
90_filter-var() {
91 local f x VAR VAL
92 declare -a new
93
94 VAR=$1
95 shift
96 eval VAL=\${${VAR}}
97 for f in ${VAL}; do
98 for x in "$@"; do
99 # Note this should work with globs like -O*
100 [[ ${f} == ${x} ]] && continue 2
101 done
102 eval new\[\${\#new\[@]}]=\${f}
103 done
104 eval export ${VAR}=\${new\[*]}
105}
106
107# @FUNCTION: filter-flags
108# @USAGE: <flags>
109# @DESCRIPTION:
110# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
103filter-flags() { 111filter-flags() {
104 local x f fset 112 _filter-hardened "$@"
105 declare -a new_CFLAGS new_CXXFLAGS 113 _filter-var CFLAGS "$@"
106 114 _filter-var CPPFLAGS "$@"
107 for x in "$@" ; do 115 _filter-var CXXFLAGS "$@"
108 case "${x}" in 116 _filter-var FFLAGS "$@"
109 -fPIC|-fpic|-fPIE|-fpie|-pie) 117 _filter-var FCFLAGS "$@"
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 0 118 return 0
132} 119}
133 120
121# @FUNCTION: filter-lfs-flags
122# @DESCRIPTION:
123# Remove flags that enable Large File Support.
134filter-lfs-flags() { 124filter-lfs-flags() {
125 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
135 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 126 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136} 127}
137 128
129# @FUNCTION: append-cppflags
130# @USAGE: <flags>
131# @DESCRIPTION:
132# Add extra <flags> to the current CPPFLAGS.
133append-cppflags() {
134 [[ -z $* ]] && return 0
135 export CPPFLAGS="${CPPFLAGS} $*"
136 return 0
137}
138
139# @FUNCTION: append-cxxflags
140# @USAGE: <flags>
141# @DESCRIPTION:
142# Add extra <flags> to the current CXXFLAGS.
143append-cxxflags() {
144 [[ -z $* ]] && return 0
145 export CXXFLAGS="${CXXFLAGS} $*"
146 return 0
147}
148
149# @FUNCTION: append-fflags
150# @USAGE: <flags>
151# @DESCRIPTION:
152# Add extra <flags> to the current {F,FC}FLAGS.
153append-fflags() {
154 [[ -z $* ]] && return 0
155 export FFLAGS="${FFLAGS} $*"
156 export FCFLAGS="${FCFLAGS} $*"
157 return 0
158}
159
160# @FUNCTION: append-lfs-flags
161# @DESCRIPTION:
162# Add flags that enable Large File Support.
138append-lfs-flags() { 163append-lfs-flags() {
164 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
139 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 165 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
140} 166}
141 167
168# @FUNCTION: append-flags
169# @USAGE: <flags>
170# @DESCRIPTION:
171# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
142append-flags() { 172append-flags() {
143 [[ -z $* ]] && return 0 173 [[ -z $* ]] && return 0
144 export CFLAGS="${CFLAGS} $*" 174 export CFLAGS="${CFLAGS} $*"
145 export CXXFLAGS="${CXXFLAGS} $*" 175 export CXXFLAGS="${CXXFLAGS} $*"
146 [ -n "`is-flag -fno-stack-protector`" -o \ 176 export FFLAGS="${FFLAGS} $*"
147 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 177 export FCFLAGS="${FCFLAGS} $*"
148 return 0 178 return 0
149} 179}
150 180
181# @FUNCTION: replace-flags
182# @USAGE: <old> <new>
183# @DESCRIPTION:
184# Replace the <old> flag with <new>. Accepts shell globs for <old>.
151replace-flags() { 185replace-flags() {
186 [[ $# != 2 ]] \
187 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
188 && die "replace-flags takes 2 arguments, not $#"
189
152 local f fset 190 local f fset
153 declare -a new_CFLAGS new_CXXFLAGS 191 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
154 192
155 for fset in CFLAGS CXXFLAGS; do 193 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
156 # Looping over the flags instead of using a global 194 # Looping over the flags instead of using a global
157 # substitution ensures that we're working with flag atoms. 195 # substitution ensures that we're working with flag atoms.
158 # Otherwise globs like -O* have the potential to wipe out the 196 # Otherwise globs like -O* have the potential to wipe out the
159 # list of flags. 197 # list of flags.
160 for f in ${!fset}; do 198 for f in ${!fset}; do
… …
166 done 204 done
167 205
168 return 0 206 return 0
169} 207}
170 208
209# @FUNCTION: replace-cpu-flags
210# @USAGE: <old> <new>
211# @DESCRIPTION:
212# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
213# with flags that select the <new> cpu. Accepts shell globs for <old>.
171replace-cpu-flags() { 214replace-cpu-flags() {
172 local newcpu="$#" ; newcpu="${!newcpu}" 215 local newcpu="$#" ; newcpu="${!newcpu}"
173 while [ $# -gt 1 ] ; do 216 while [ $# -gt 1 ] ; do
174 # quote to make sure that no globbing is done (particularly on 217 # quote to make sure that no globbing is done (particularly on
175 # ${oldcpu} prior to calling replace-flags 218 # ${oldcpu}) prior to calling replace-flags
176 replace-flags "-march=${1}" "-march=${newcpu}" 219 replace-flags "-march=${1}" "-march=${newcpu}"
177 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 220 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
178 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 221 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
179 shift 222 shift
180 done 223 done
181 return 0 224 return 0
182} 225}
183 226
227_is_flagq() {
228 local x
229 for x in ${!1} ; do
230 [[ ${x} == $2 ]] && return 0
231 done
232 return 1
233}
234
235# @FUNCTION: is-flagq
236# @USAGE: <flag>
237# @DESCRIPTION:
238# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
239is-flagq() {
240 [[ -n $2 ]] && die "Usage: is-flag <flag>"
241 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
242}
243
244# @FUNCTION: is-flag
245# @USAGE: <flag>
246# @DESCRIPTION:
247# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
184is-flag() { 248is-flag() {
185 local x 249 is-flagq "$@" && 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} 250}
196 251
252# @FUNCTION: is-ldflagq
253# @USAGE: <flag>
254# @DESCRIPTION:
255# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
256is-ldflagq() {
257 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
258 _is_flagq LDFLAGS $1
259}
260
261# @FUNCTION: is-ldflag
262# @USAGE: <flag>
263# @DESCRIPTION:
264# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
265is-ldflag() {
266 is-ldflagq "$@" && echo true
267}
268
269# @FUNCTION: filter-mfpmath
270# @USAGE: <math types>
271# @DESCRIPTION:
272# Remove specified math types from the fpmath flag. For example, if the user
273# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
274# -mfpmath=386.
197filter-mfpmath() { 275filter-mfpmath() {
198 local orig_mfpmath new_math prune_math 276 local orig_mfpmath new_math prune_math
199 277
200 # save the original -mfpmath flag 278 # save the original -mfpmath flag
201 orig_mfpmath="`get-flag -mfpmath`" 279 orig_mfpmath=$(get-flag -mfpmath)
202 # get the value of the current -mfpmath flag 280 # get the value of the current -mfpmath flag
203 new_math=" `get-flag mfpmath | tr , ' '` " 281 new_math=$(get-flag mfpmath)
282 new_math=" ${new_math//,/ } "
204 # figure out which math values are to be removed 283 # figure out which math values are to be removed
205 prune_math="" 284 prune_math=""
206 for prune_math in "$@" ; do 285 for prune_math in "$@" ; do
207 new_math="${new_math/ ${prune_math} / }" 286 new_math=${new_math/ ${prune_math} / }
208 done 287 done
209 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 288 new_math=$(echo ${new_math})
289 new_math=${new_math// /,}
210 290
211 if [ -z "${new_math}" ] ; then 291 if [[ -z ${new_math} ]] ; then
212 # if we're removing all user specified math values are 292 # if we're removing all user specified math values are
213 # slated for removal, then we just filter the flag 293 # slated for removal, then we just filter the flag
214 filter-flags ${orig_mfpmath} 294 filter-flags ${orig_mfpmath}
215 else 295 else
216 # if we only want to filter some of the user specified 296 # if we only want to filter some of the user specified
… …
218 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 298 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
219 fi 299 fi
220 return 0 300 return 0
221} 301}
222 302
303# @FUNCTION: strip-flags
304# @DESCRIPTION:
305# Strip C[XX]FLAGS of everything except known good/safe flags.
223strip-flags() { 306strip-flags() {
224 local x y flag NEW_CFLAGS NEW_CXXFLAGS 307 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
225 308
226 setup-allowed-flags 309 setup-allowed-flags
227 310
228 local NEW_CFLAGS="" 311 local NEW_CFLAGS=""
229 local NEW_CXXFLAGS="" 312 local NEW_CXXFLAGS=""
313 local NEW_FFLAGS=""
314 local NEW_FCFLAGS=""
230 315
231 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 316 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
232 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 317 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
233 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 318 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
234 fi 319 fi
… …
253 break 338 break
254 fi 339 fi
255 done 340 done
256 done 341 done
257 342
343 for x in ${FFLAGS}; do
344 for y in ${ALLOWED_FLAGS}; do
345 flag=${x%%=*}
346 if [ "${flag%%${y}}" = "" ] ; then
347 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
348 break
349 fi
350 done
351 done
352
353 for x in ${FCFLAGS}; do
354 for y in ${ALLOWED_FLAGS}; do
355 flag=${x%%=*}
356 if [ "${flag%%${y}}" = "" ] ; then
357 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
358 break
359 fi
360 done
361 done
362
258 # In case we filtered out all optimization flags fallback to -O2 363 # In case we filtered out all optimization flags fallback to -O2
259 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 364 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
260 NEW_CFLAGS="${NEW_CFLAGS} -O2" 365 NEW_CFLAGS="${NEW_CFLAGS} -O2"
261 fi 366 fi
262 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 367 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
263 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 368 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
264 fi 369 fi
370 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
371 NEW_FFLAGS="${NEW_FFLAGS} -O2"
372 fi
373 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
374 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
375 fi
265 376
266 set +f # re-enable pathname expansion 377 set +f # re-enable pathname expansion
267 378
268 export CFLAGS="${NEW_CFLAGS}" 379 export CFLAGS="${NEW_CFLAGS}"
269 export CXXFLAGS="${NEW_CXXFLAGS}" 380 export CXXFLAGS="${NEW_CXXFLAGS}"
381 export FFLAGS="${NEW_FFLAGS}"
382 export FCFLAGS="${NEW_FCFLAGS}"
383 return 0
384}
385
386test-flag-PROG() {
387 local comp=$1
388 local flags="$2"
389
390 [[ -z ${comp} || -z ${flags} ]] && \
270 return 0 391 return 1
271}
272 392
393 local PROG=$(tc-get${comp})
394 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
395 > /dev/null 2>&1
396}
397
398# @FUNCTION: test-flag-CC
399# @USAGE: <flag>
400# @DESCRIPTION:
401# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
402test-flag-CC() { test-flag-PROG "CC" "$1"; }
403
404# @FUNCTION: test-flag-CXX
405# @USAGE: <flag>
406# @DESCRIPTION:
407# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
408test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
409
410# @FUNCTION: test-flag-F77
411# @USAGE: <flag>
412# @DESCRIPTION:
413# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
414test-flag-F77() { test-flag-PROG "F77" "$1"; }
415
416# @FUNCTION: test-flag-FC
417# @USAGE: <flag>
418# @DESCRIPTION:
419# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
420test-flag-FC() { test-flag-PROG "FC" "$1"; }
421
422test-flags-PROG() {
423 local comp=$1
424 local flags
425 local x
426
427 shift
428
429 [[ -z ${comp} ]] && return 1
430
431 x=""
432 for x in "$@" ; do
433 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
434 done
435
436 echo "${flags}"
437
438 # Just bail if we dont have any flags
439 [[ -n ${flags} ]]
440}
441
442# @FUNCTION: test-flags-CC
443# @USAGE: <flags>
444# @DESCRIPTION:
445# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
446test-flags-CC() { test-flags-PROG "CC" "$@"; }
447
448# @FUNCTION: test-flags-CXX
449# @USAGE: <flags>
450# @DESCRIPTION:
451# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
452test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
453
454# @FUNCTION: test-flags-F77
455# @USAGE: <flags>
456# @DESCRIPTION:
457# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
458test-flags-F77() { test-flags-PROG "F77" "$@"; }
459
460# @FUNCTION: test-flags-FC
461# @USAGE: <flags>
462# @DESCRIPTION:
463# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
464test-flags-FC() { test-flags-PROG "FC" "$@"; }
465
466# @FUNCTION: test-flags
467# @USAGE: <flags>
468# @DESCRIPTION:
469# Short-hand that should hopefully work for both C and C++ compiler, but
470# its really only present due to the append-flags() abomination.
471test-flags() { test-flags-CC "$@"; }
472
473# @FUNCTION: test_flag
474# @DESCRIPTION:
475# DEPRICIATED, use test-flags()
273test_flag() { 476test_flag() {
274 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 477 ewarn "test_flag: deprecated, please use test-flags()!" >&2
275 printf "%s\n" "$*"
276 return 0
277 fi
278 return 1
279}
280 478
479 test-flags-CC "$@"
480}
481
482# @FUNCTION: test_version_info
483# @USAGE: <version>
484# @DESCRIPTION:
485# Returns shell true if the current C compiler version matches <version>, else returns shell false.
486# Accepts shell globs.
281test_version_info() { 487test_version_info() {
282 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 488 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
283 return 0 489 return 0
284 else 490 else
285 return 1 491 return 1
286 fi 492 fi
287} 493}
288 494
495# @FUNCTION: strip-unsupported-flags
496# @DESCRIPTION:
497# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
289strip-unsupported-flags() { 498strip-unsupported-flags() {
290 local NEW_CFLAGS NEW_CXXFLAGS 499 export CFLAGS=$(test-flags-CC ${CFLAGS})
291 500 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
292 for x in ${CFLAGS} ; do 501 export FFLAGS=$(test-flags-F77 ${FFLAGS})
293 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 502 export FCFLAGS=$(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} 503}
302 504
505# @FUNCTION: get-flag
506# @USAGE: <flag>
507# @DESCRIPTION:
508# Find and echo the value for a particular flag. Accepts shell globs.
303get-flag() { 509get-flag() {
304 local f findflag="$1" 510 local f findflag="$1"
305 511
306 # this code looks a little flaky but seems to work for 512 # this code looks a little flaky but seems to work for
307 # everything we want ... 513 # everything we want ...
308 # for example, if CFLAGS="-march=i686": 514 # for example, if CFLAGS="-march=i686":
309 # `get-flag -march` == "-march=i686" 515 # `get-flag -march` == "-march=i686"
310 # `get-flag march` == "i686" 516 # `get-flag march` == "i686"
311 for f in ${CFLAGS} ${CXXFLAGS} ; do 517 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
312 if [ "${f/${findflag}}" != "${f}" ] ; then 518 if [ "${f/${findflag}}" != "${f}" ] ; then
313 printf "%s\n" "${f/-${findflag}=}" 519 printf "%s\n" "${f/-${findflag}=}"
314 return 0 520 return 0
315 fi 521 fi
316 done 522 done
317 return 1 523 return 1
318} 524}
319 525
526# @FUNCTION: has_hardened
527# @DESCRIPTION:
528# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
320has_hardened() { 529has_hardened() {
530 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
531
321 test_version_info Hardened && return 0 532 test_version_info Hardened && return 0
322 # the specs file wont exist unless gcc has GCC_SPECS support 533 # The specs file wont exist unless gcc has GCC_SPECS support
323 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 534 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
324 return 0
325 return 1
326} 535}
327 536
537# @FUNCTION: has_pic
538# @DESCRIPTION:
539# DEPRECATED - use gcc-specs-pie from toolchain-funcs
328# indicate whether PIC is set 540# indicate whether PIC is set
329has_pic() { 541has_pic() {
330 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 542 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
331 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
332 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
333 return 1
334}
335 543
544 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
545 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
546 gcc-specs-pie
547}
548
549# @FUNCTION: has_pie
550# @DESCRIPTION:
551# DEPRECATED - use gcc-specs-pie from toolchain-funcs
336# indicate whether PIE is set 552# indicate whether PIE is set
337has_pie() { 553has_pie() {
338 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 554 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
339 [ "${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}
345 555
556 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
557 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
558 gcc-specs-pie
559}
560
561# @FUNCTION: has_ssp_all
562# @DESCRIPTION:
563# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
346# indicate whether code for SSP is being generated for all functions 564# indicate whether code for SSP is being generated for all functions
347has_ssp_all() { 565has_ssp_all() {
566 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
567
348 # note; this matches only -fstack-protector-all 568 # note; this matches only -fstack-protector-all
349 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0 569 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
350 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0 570 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
351 return 1 571 gcc-specs-ssp-to-all
352} 572}
353 573
574# @FUNCTION: has_ssp
575# @DESCRIPTION:
576# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
354# indicate whether code for SSP is being generated 577# indicate whether code for SSP is being generated
355has_ssp() { 578has_ssp() {
579 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
580
356 # note; this matches both -fstack-protector and -fstack-protector-all 581 # note; this matches both -fstack-protector and -fstack-protector-all
357 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 582 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
358 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0 583 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
359 return 1 584 gcc-specs-ssp
360} 585}
361 586
587# @FUNCTION: has_m64
588# @DESCRIPTION:
589# This doesn't test if the flag is accepted, it tests if the flag actually
590# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
591# return code is 0, else the return code is 1.
362has_m64() { 592has_m64() {
363 # this doesnt test if the flag is accepted, it tests if the flag 593 # this doesnt test if the flag is accepted, it tests if the flag
364 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 594 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
365 # please dont replace this function with test_flag in some future 595 # please dont replace this function with test_flag in some future
366 # clean-up! 596 # clean-up!
597
367 local temp="$(emktemp)" 598 local temp="$(emktemp)"
368 echo "int main() { return(0); }" > ${temp}.c 599 echo "int main() { return(0); }" > "${temp}".c
369 MY_CC=$(tc-getCC) 600 MY_CC=$(tc-getCC)
370 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 601 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
371 local ret=$? 602 local ret=$?
372 rm -f ${temp}.c 603 rm -f "${temp}".c
373 [ "$ret" != "1" ] && return 0 604 [[ ${ret} != 1 ]] && return 0
374 return 1 605 return 1
375} 606}
376 607
608# @FUNCTION: has_m32
609# @DESCRIPTION:
610# This doesn't test if the flag is accepted, it tests if the flag actually
611# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
612# code is 0, else return code is 1.
377has_m32() { 613has_m32() {
378 # this doesnt test if the flag is accepted, it tests if the flag 614 # this doesnt test if the flag is accepted, it tests if the flag
379 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 615 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
380 # please dont replace this function with test_flag in some future 616 # please dont replace this function with test_flag in some future
381 # clean-up! 617 # clean-up!
382 618
383 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0 619 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
384 620
385 local temp="$(emktemp)" 621 local temp=$(emktemp)
386 echo "int main() { return(0); }" > ${temp}.c 622 echo "int main() { return(0); }" > "${temp}".c
387 MY_CC=$(tc-getCC) 623 MY_CC=$(tc-getCC)
388 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 624 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
389 local ret=$? 625 local ret=$?
390 rm -f ${temp}.c 626 rm -f "${temp}".c
391 [ "$ret" != "1" ] && return 0 627 [[ ${ret} != 1 ]] && return 0
392 return 1 628 return 1
393} 629}
394 630
631# @FUNCTION: replace-sparc64-flags
632# @DESCRIPTION:
633# Sets mcpu to v8 and uses the original value as mtune if none specified.
395replace-sparc64-flags() { 634replace-sparc64-flags() {
396 local SPARC64_CPUS="ultrasparc v9" 635 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
397 636
398 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 637 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
399 for x in ${SPARC64_CPUS}; do 638 for x in ${SPARC64_CPUS}; do
400 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 639 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
401 done 640 done
402 else 641 else
403 for x in ${SPARC64_CPUS}; do 642 for x in ${SPARC64_CPUS}; do
404 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 643 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
405 done 644 done
406 fi 645 fi
407 646
408 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 647 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
409 for x in ${SPARC64_CPUS}; do 648 for x in ${SPARC64_CPUS}; do
410 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 649 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
411 done 650 done
412 else 651 else
413 for x in ${SPARC64_CPUS}; do 652 for x in ${SPARC64_CPUS}; do
414 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 653 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
415 done 654 done
416 fi 655 fi
417 656
418 export CFLAGS CXXFLAGS 657 export CFLAGS CXXFLAGS
419} 658}
420 659
660# @FUNCTION: append-ldflags
661# @USAGE: <flags>
662# @DESCRIPTION:
663# Add extra <flags> to the current LDFLAGS.
421append-ldflags() { 664append-ldflags() {
665 [[ -z $* ]] && return 0
666 local flag
667 for flag in "$@"; do
668 [[ ${flag} == -l* ]] && \
669 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
670 done
671
422 export LDFLAGS="${LDFLAGS} $*" 672 export LDFLAGS="${LDFLAGS} $*"
423 return 0 673 return 0
424} 674}
425 675
676# @FUNCTION: filter-ldflags
677# @USAGE: <flags>
678# @DESCRIPTION:
679# Remove particular <flags> from LDFLAGS. Accepts shell globs.
426filter-ldflags() { 680filter-ldflags() {
427 local x 681 _filter-var LDFLAGS "$@"
682 return 0
683}
428 684
429 # we do this fancy spacing stuff so as to not filter 685# @FUNCTION: raw-ldflags
430 # out part of a flag ... we want flag atoms ! :D 686# @USAGE: <flags>
431 LDFLAGS=" ${LDFLAGS} " 687# @DESCRIPTION:
688# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
689# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
690# to gcc where it needs the '-Wl,'.
691raw-ldflags() {
692 local x input="$@"
693 [[ -z ${input} ]] && input=${LDFLAGS}
694 set --
432 for x in "$@" ; do 695 for x in ${input} ; do
433 LDFLAGS=${LDFLAGS// ${x} / } 696 x=${x#-Wl,}
697 set -- "$@" ${x//,/ }
434 done 698 done
435 [[ -z ${LDFLAGS// } ]] \ 699 echo "$@"
436 && LDFLAGS="" \
437 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
438 export LDFLAGS
439 return 0
440} 700}
441 701
442fstack-flags() { 702# @FUNCTION: bindnow-flags
443 if has_ssp; then 703# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
444 [ -z "`is-flag -fno-stack-protector`" ] && 704# @DESCRIPTION:
445 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 705# DEPRECATED - Gets the flags needed for "NOW" binding
446 fi 706bindnow-flags() {
447 return 0 707 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild"
448} 708}
449 709
450# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 710
451# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 711# Some tests for when we screw with things and want to make
452# fixes. 712# sure we didn't break anything
713#TESTS() {
714# CFLAGS="-a -b -c=1"
715# CXXFLAGS="-x -y -z=2"
716# LDFLAGS="-l -m -n=3"
453# 717#
454# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 718# die() { exit 1; }
455gcc2-flags() { 719# (is-flag 1 2 3) && die
456 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then 720# (is-ldflag 1 2 3) && die
457 CFLAGS=${CFLAGS//-mtune=/-mcpu=} 721#
458 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=} 722# is-flagq -l && die
459 fi 723# is-ldflagq -a && die
460 724# is-flagq -a || die
461 replace-cpu-flags k6-{2,3} k6 725# is-flagq -x || die
462 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686 726# is-ldflagq -n=* || die
463 727# is-ldflagq -n && die
464 replace-cpu-flags pentium-mmx i586 728#
465 replace-cpu-flags pentium{2,3,4} i686 729# strip-unsupported-flags
466 730# [[ ${CFLAGS} == "-c=1" ]] || die
467 replace-cpu-flags ev6{7,8} ev6 731# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
468 732#
469 export CFLAGS CXXFLAGS 733# echo "All tests pass"
470} 734#}
735#TESTS
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