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Revision 1.1.1.1 Revision 1.132
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 1.1.1.1 2005/11/30 09:59:19 chriswhite 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
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="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
101 export ALLOWED_FLAGS="${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="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow"
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
107 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \ 49 -mieee -mieee-with-inexact -mschedule \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
54 -msecure-plt -m*-toc -D* -U*"
115 55
116 # C[XX]FLAGS that we are think is ok, but needs testing 56 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
117 # NOTE: currently -Os have issues with gcc3 and K6* arch's 57 # NOTE: currently -Os have issues with gcc3 and K6* arch's
118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
119 return 0 59 return 0
120} 60}
121 61
62# inverted filters for hardened compiler. This is trying to unpick
63# the hardened compiler defaults.
64_filter-hardened() {
65 local f
66 for f in "$@" ; 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 $(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.
122filter-flags() { 111filter-flags() {
123 local x f fset 112 _filter-hardened "$@"
124 declare -a new_CFLAGS new_CXXFLAGS 113 _filter-var CFLAGS "$@"
125 114 _filter-var CPPFLAGS "$@"
126 for x in "$@" ; do 115 _filter-var CXXFLAGS "$@"
127 case "${x}" in 116 _filter-var FFLAGS "$@"
128 -fPIC|-fpic|-fPIE|-fpie|-pie) 117 _filter-var FCFLAGS "$@"
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 0 118 return 0
151} 119}
152 120
121# @FUNCTION: filter-lfs-flags
122# @DESCRIPTION:
123# Remove flags that enable Large File Support.
153filter-lfs-flags() { 124filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 125 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
155 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
156} 127}
157 128
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.
158append-lfs-flags() { 163append-lfs-flags() {
159 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 164 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
160 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
161} 166}
162 167
168# @FUNCTION: append-flags
169# @USAGE: <flags>
170# @DESCRIPTION:
171# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
163append-flags() { 172append-flags() {
164 [[ -z $* ]] && return 0 173 [[ -z $* ]] && return 0
165 export CFLAGS="${CFLAGS} $*" 174 export CFLAGS="${CFLAGS} $*"
166 export CXXFLAGS="${CXXFLAGS} $*" 175 export CXXFLAGS="${CXXFLAGS} $*"
167 [ -n "`is-flag -fno-stack-protector`" -o \ 176 export FFLAGS="${FFLAGS} $*"
168 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 177 export FCFLAGS="${FCFLAGS} $*"
169 return 0 178 return 0
170} 179}
171 180
181# @FUNCTION: replace-flags
182# @USAGE: <old> <new>
183# @DESCRIPTION:
184# Replace the <old> flag with <new>. Accepts shell globs for <old>.
172replace-flags() { 185replace-flags() {
173 [[ $# != 2 ]] \ 186 [[ $# != 2 ]] \
174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 187 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
175 && die "replace-flags takes 2 arguments, not $#" 188 && die "replace-flags takes 2 arguments, not $#"
176 189
177 local f fset 190 local f fset
178 declare -a new_CFLAGS new_CXXFLAGS 191 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
179 192
180 for fset in CFLAGS CXXFLAGS; do 193 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
181 # Looping over the flags instead of using a global 194 # Looping over the flags instead of using a global
182 # substitution ensures that we're working with flag atoms. 195 # substitution ensures that we're working with flag atoms.
183 # Otherwise globs like -O* have the potential to wipe out the 196 # Otherwise globs like -O* have the potential to wipe out the
184 # list of flags. 197 # list of flags.
185 for f in ${!fset}; do 198 for f in ${!fset}; do
191 done 204 done
192 205
193 return 0 206 return 0
194} 207}
195 208
209# @FUNCTION: replace-cpu-flags
210# @USAGE: <old> <new>
211# @DESCRIPTION:
212# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
213# with flags that select the <new> cpu. Accepts shell globs for <old>.
196replace-cpu-flags() { 214replace-cpu-flags() {
197 local newcpu="$#" ; newcpu="${!newcpu}" 215 local newcpu="$#" ; newcpu="${!newcpu}"
198 while [ $# -gt 1 ] ; do 216 while [ $# -gt 1 ] ; do
199 # quote to make sure that no globbing is done (particularly on 217 # quote to make sure that no globbing is done (particularly on
200 # ${oldcpu} prior to calling replace-flags 218 # ${oldcpu}) prior to calling replace-flags
201 replace-flags "-march=${1}" "-march=${newcpu}" 219 replace-flags "-march=${1}" "-march=${newcpu}"
202 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 220 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
203 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 221 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
204 shift 222 shift
205 done 223 done
206 return 0 224 return 0
207} 225}
208 226
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 $1
242}
243
244# @FUNCTION: is-flag
245# @USAGE: <flag>
246# @DESCRIPTION:
247# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
209is-flag() { 248is-flag() {
210 local x 249 is-flagq "$@" && 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} 250}
221 251
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.
222filter-mfpmath() { 275filter-mfpmath() {
223 local orig_mfpmath new_math prune_math 276 local orig_mfpmath new_math prune_math
224 277
225 # save the original -mfpmath flag 278 # save the original -mfpmath flag
226 orig_mfpmath="`get-flag -mfpmath`" 279 orig_mfpmath=$(get-flag -mfpmath)
227 # get the value of the current -mfpmath flag 280 # get the value of the current -mfpmath flag
228 new_math=" `get-flag mfpmath | tr , ' '` " 281 new_math=$(get-flag mfpmath)
282 new_math=" ${new_math//,/ } "
229 # figure out which math values are to be removed 283 # figure out which math values are to be removed
230 prune_math="" 284 prune_math=""
231 for prune_math in "$@" ; do 285 for prune_math in "$@" ; do
232 new_math="${new_math/ ${prune_math} / }" 286 new_math=${new_math/ ${prune_math} / }
233 done 287 done
234 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 288 new_math=$(echo ${new_math})
289 new_math=${new_math// /,}
235 290
236 if [ -z "${new_math}" ] ; then 291 if [[ -z ${new_math} ]] ; then
237 # if we're removing all user specified math values are 292 # if we're removing all user specified math values are
238 # slated for removal, then we just filter the flag 293 # slated for removal, then we just filter the flag
239 filter-flags ${orig_mfpmath} 294 filter-flags ${orig_mfpmath}
240 else 295 else
241 # if we only want to filter some of the user specified 296 # if we only want to filter some of the user specified
243 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 298 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
244 fi 299 fi
245 return 0 300 return 0
246} 301}
247 302
303# @FUNCTION: strip-flags
304# @DESCRIPTION:
305# Strip C[XX]FLAGS of everything except known good/safe flags.
248strip-flags() { 306strip-flags() {
249 local x y flag NEW_CFLAGS NEW_CXXFLAGS 307 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
250 308
251 setup-allowed-flags 309 setup-allowed-flags
252 310
253 local NEW_CFLAGS="" 311 local NEW_CFLAGS=""
254 local NEW_CXXFLAGS="" 312 local NEW_CXXFLAGS=""
313 local NEW_FFLAGS=""
314 local NEW_FCFLAGS=""
255 315
256 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 316 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
257 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 317 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
258 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 318 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
259 fi 319 fi
278 break 338 break
279 fi 339 fi
280 done 340 done
281 done 341 done
282 342
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} ${x}"
358 break
359 fi
360 done
361 done
362
283 # In case we filtered out all optimization flags fallback to -O2 363 # In case we filtered out all optimization flags fallback to -O2
284 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 364 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
285 NEW_CFLAGS="${NEW_CFLAGS} -O2" 365 NEW_CFLAGS="${NEW_CFLAGS} -O2"
286 fi 366 fi
287 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 367 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
288 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 368 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
289 fi 369 fi
370 if [ "${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="${NEW_FCFLAGS} -O2"
375 fi
290 376
291 set +f # re-enable pathname expansion 377 set +f # re-enable pathname expansion
292 378
293 export CFLAGS="${NEW_CFLAGS}" 379 export CFLAGS="${NEW_CFLAGS}"
294 export CXXFLAGS="${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 ${flags} ]] && \
295 return 0 391 return 1
296}
297 392
393 local PROG=$(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()
298test_flag() { 476test_flag() {
299 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 477 ewarn "test_flag: deprecated, please use test-flags()!" >&2
300 printf "%s\n" "$*"
301 return 0
302 fi
303 return 1
304}
305 478
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.
306test_version_info() { 487test_version_info() {
307 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 488 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
308 return 0 489 return 0
309 else 490 else
310 return 1 491 return 1
311 fi 492 fi
312} 493}
313 494
495# @FUNCTION: strip-unsupported-flags
496# @DESCRIPTION:
497# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
314strip-unsupported-flags() { 498strip-unsupported-flags() {
315 local x NEW_CFLAGS NEW_CXXFLAGS 499 export CFLAGS=$(test-flags-CC ${CFLAGS})
316 500 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
317 for x in ${CFLAGS} ; do 501 export FFLAGS=$(test-flags-F77 ${FFLAGS})
318 NEW_CFLAGS="${NEW_CFLAGS} $(test_flag ${x})" 502 export FCFLAGS=$(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} 503}
327 504
505# @FUNCTION: get-flag
506# @USAGE: <flag>
507# @DESCRIPTION:
508# Find and echo the value for a particular flag. Accepts shell globs.
328get-flag() { 509get-flag() {
329 local f findflag="$1" 510 local f findflag="$1"
330 511
331 # this code looks a little flaky but seems to work for 512 # this code looks a little flaky but seems to work for
332 # everything we want ... 513 # everything we want ...
333 # for example, if CFLAGS="-march=i686": 514 # for example, if CFLAGS="-march=i686":
334 # `get-flag -march` == "-march=i686" 515 # `get-flag -march` == "-march=i686"
335 # `get-flag march` == "i686" 516 # `get-flag march` == "i686"
336 for f in ${CFLAGS} ${CXXFLAGS} ; do 517 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
337 if [ "${f/${findflag}}" != "${f}" ] ; then 518 if [ "${f/${findflag}}" != "${f}" ] ; then
338 printf "%s\n" "${f/-${findflag}=}" 519 printf "%s\n" "${f/-${findflag}=}"
339 return 0 520 return 0
340 fi 521 fi
341 done 522 done
342 return 1 523 return 1
343} 524}
344 525
526# @FUNCTION: has_hardened
527# @DESCRIPTION:
345# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 528# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
346has_hardened() { 529has_hardened() {
530 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
531
347 test_version_info Hardened && return 0 532 test_version_info Hardened && return 0
348 # the specs file wont exist unless gcc has GCC_SPECS support 533 # The specs file wont exist unless gcc has GCC_SPECS support
349 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 534 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
350 return 0
351 return 1
352} 535}
353 536
537# @FUNCTION: has_pic
538# @DESCRIPTION:
354# DEPRECATED - use gcc-specs-pie from toolchain-funcs 539# DEPRECATED - use gcc-specs-pie from toolchain-funcs
355# indicate whether PIC is set 540# indicate whether PIC is set
356has_pic() { 541has_pic() {
357 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 542 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
358 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
359 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
360 return 1
361}
362 543
544 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
545 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
546 gcc-specs-pie
547}
548
549# @FUNCTION: has_pie
550# @DESCRIPTION:
363# DEPRECATED - use gcc-specs-pie from toolchain-funcs 551# DEPRECATED - use gcc-specs-pie from toolchain-funcs
364# indicate whether PIE is set 552# indicate whether PIE is set
365has_pie() { 553has_pie() {
366 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 554 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
367 [ "${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}
373 555
556 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
557 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
558 gcc-specs-pie
559}
560
561# @FUNCTION: has_ssp_all
562# @DESCRIPTION:
374# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 563# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
375# indicate whether code for SSP is being generated for all functions 564# indicate whether code for SSP is being generated for all functions
376has_ssp_all() { 565has_ssp_all() {
566 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
567
377 # note; this matches only -fstack-protector-all 568 # note; this matches only -fstack-protector-all
378 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0 569 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
379 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0 570 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
380 gcc-specs-ssp && return 0 571 gcc-specs-ssp-to-all
381 return 1
382} 572}
383 573
574# @FUNCTION: has_ssp
575# @DESCRIPTION:
384# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 576# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
385# indicate whether code for SSP is being generated 577# indicate whether code for SSP is being generated
386has_ssp() { 578has_ssp() {
579 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
580
387 # note; this matches both -fstack-protector and -fstack-protector-all 581 # note; this matches both -fstack-protector and -fstack-protector-all
388 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 582 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
389 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0 583 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
390 gcc-specs-ssp && return 0 584 gcc-specs-ssp
391 return 1
392} 585}
393 586
587# @FUNCTION: has_m64
588# @DESCRIPTION:
589# This doesn't test if the flag is accepted, it tests if the flag actually
590# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
591# return code is 0, else the return code is 1.
394has_m64() { 592has_m64() {
395 # this doesnt test if the flag is accepted, it tests if the flag 593 # this doesnt test if the flag is accepted, it tests if the flag
396 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 594 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
397 # please dont replace this function with test_flag in some future 595 # please dont replace this function with test_flag in some future
398 # clean-up! 596 # clean-up!
597
399 local temp="$(emktemp)" 598 local temp="$(emktemp)"
400 echo "int main() { return(0); }" > ${temp}.c 599 echo "int main() { return(0); }" > "${temp}".c
401 MY_CC=$(tc-getCC) 600 MY_CC=$(tc-getCC)
402 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 601 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
403 local ret=$? 602 local ret=$?
404 rm -f ${temp}.c 603 rm -f "${temp}".c
405 [ "$ret" != "1" ] && return 0 604 [[ ${ret} != 1 ]] && return 0
406 return 1 605 return 1
407} 606}
408 607
608# @FUNCTION: has_m32
609# @DESCRIPTION:
610# This doesn't test if the flag is accepted, it tests if the flag actually
611# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
612# code is 0, else return code is 1.
409has_m32() { 613has_m32() {
410 # this doesnt test if the flag is accepted, it tests if the flag 614 # this doesnt test if the flag is accepted, it tests if the flag
411 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 615 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
412 # please dont replace this function with test_flag in some future 616 # please dont replace this function with test_flag in some future
413 # clean-up! 617 # clean-up!
418 echo "int main() { return(0); }" > "${temp}".c 622 echo "int main() { return(0); }" > "${temp}".c
419 MY_CC=$(tc-getCC) 623 MY_CC=$(tc-getCC)
420 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 624 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
421 local ret=$? 625 local ret=$?
422 rm -f "${temp}".c 626 rm -f "${temp}".c
423 [ "$ret" != "1" ] && return 0 627 [[ ${ret} != 1 ]] && return 0
424 return 1 628 return 1
425} 629}
426 630
631# @FUNCTION: replace-sparc64-flags
632# @DESCRIPTION:
633# Sets mcpu to v8 and uses the original value as mtune if none specified.
427replace-sparc64-flags() { 634replace-sparc64-flags() {
428 local SPARC64_CPUS="ultrasparc v9" 635 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
429 636
430 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 637 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
431 for x in ${SPARC64_CPUS}; do 638 for x in ${SPARC64_CPUS}; do
432 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 639 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
433 done 640 done
434 else 641 else
435 for x in ${SPARC64_CPUS}; do 642 for x in ${SPARC64_CPUS}; do
436 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 643 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
437 done 644 done
438 fi 645 fi
439 646
440 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 647 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
441 for x in ${SPARC64_CPUS}; do 648 for x in ${SPARC64_CPUS}; do
442 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 649 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
443 done 650 done
444 else 651 else
445 for x in ${SPARC64_CPUS}; do 652 for x in ${SPARC64_CPUS}; do
446 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 653 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
447 done 654 done
448 fi 655 fi
449 656
450 export CFLAGS CXXFLAGS 657 export CFLAGS CXXFLAGS
451} 658}
452 659
660# @FUNCTION: append-ldflags
661# @USAGE: <flags>
662# @DESCRIPTION:
663# Add extra <flags> to the current LDFLAGS.
453append-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
454 export LDFLAGS="${LDFLAGS} $*" 672 export LDFLAGS="${LDFLAGS} $*"
455 return 0 673 return 0
456} 674}
457 675
676# @FUNCTION: filter-ldflags
677# @USAGE: <flags>
678# @DESCRIPTION:
679# Remove particular <flags> from LDFLAGS. Accepts shell globs.
458filter-ldflags() { 680filter-ldflags() {
459 local x 681 _filter-var LDFLAGS "$@"
682 return 0
683}
460 684
461 # we do this fancy spacing stuff so as to not filter 685# @FUNCTION: raw-ldflags
462 # out part of a flag ... we want flag atoms ! :D 686# @USAGE: <flags>
463 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 --
464 for x in "$@" ; do 695 for x in ${input} ; do
465 LDFLAGS=${LDFLAGS// ${x} / } 696 x=${x#-Wl,}
697 set -- "$@" ${x//,/ }
466 done 698 done
467 [[ -z ${LDFLAGS// } ]] \ 699 echo "$@"
468 && LDFLAGS="" \
469 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
470 export LDFLAGS
471 return 0
472} 700}
473 701
474fstack-flags() { 702# @FUNCTION: bindnow-flags
475 if gcc-specs-ssp; then 703# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
476 [ -z "`is-flag -fno-stack-protector`" ] && 704# @DESCRIPTION:
477 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 705# DEPRECATED - Gets the flags needed for "NOW" binding
478 fi 706bindnow-flags() {
479 return 0 707 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild"
480} 708}
481 709
482# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 710
483# 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
484# 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"
485# 717#
486# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 718# die() { exit 1; }
487gcc2-flags() { 719# (is-flag 1 2 3) && die
488 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then 720# (is-ldflag 1 2 3) && die
489 CFLAGS=${CFLAGS//-mtune=/-mcpu=} 721#
490 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=} 722# is-flagq -l && die
491 fi 723# is-ldflagq -a && die
492 724# is-flagq -a || die
493 replace-cpu-flags k6-{2,3} k6 725# is-flagq -x || die
494 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686 726# is-ldflagq -n=* || die
495 727# is-ldflagq -n && die
496 replace-cpu-flags pentium-mmx i586 728#
497 replace-cpu-flags pentium{2,3,4} i686 729# strip-unsupported-flags
498 730# [[ ${CFLAGS} == "-c=1" ]] || die
499 replace-cpu-flags ev6{7,8} ev6 731# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
500 732#
501 export CFLAGS CXXFLAGS 733# echo "All tests pass"
502} 734#}
503 735#TESTS
504# Gets the flags needed for "NOW" binding
505bindnow-flags() {
506 case $($(tc-getLD) -v 2>&1 </dev/null) in
507 *GNU* | *'with BFD'*) # GNU ld
508 echo "-Wl,-z,now" ;;
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
519}

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