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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 1.101 2006/01/01 01:14:59 swegener Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.123 2008/06/07 16:42:32 flameeyes 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 27
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 28
94# C[XX]FLAGS that we allow in strip-flags 29# C[XX]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="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
107 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \ 49 -mieee -mieee-with-inexact -mschedule \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
54 -msecure-plt -D*"
115 55
116 # C[XX]FLAGS that we are think is ok, but needs testing 56 # C[XX]FLAGS that we are think is ok, but needs testing
117 # NOTE: currently -Os have issues with gcc3 and K6* arch's 57 # NOTE: currently -Os have issues with gcc3 and K6* arch's
118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
119 return 0 59 return 0
120} 60}
121 61
62# inverted filters for hardened compiler. This is trying to unpick
63# the hardened compiler defaults.
64_filter-hardened() {
65 local f
66 for f in "$@" ; 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}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
128 -fPIC|-fpic|-fPIE|-fpie|-pie)
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 0 113 return 0
151} 114}
152 115
116# @FUNCTION: filter-lfs-flags
117# @DESCRIPTION:
118# Remove flags that enable Large File Support.
153filter-lfs-flags() { 119filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 120 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
155 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 121 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
156} 122}
157 123
124# @FUNCTION: append-cppflags
125# @USAGE: <flags>
126# @DESCRIPTION:
127# Add extra <flags> to the current CPPFLAGS.
128append-cppflags() {
129 [[ -z $* ]] && return 0
130 export CPPFLAGS="${CPPFLAGS} $*"
131 return 0
132}
133
134# @FUNCTION: append-lfs-flags
135# @DESCRIPTION:
136# Add flags that enable Large File Support.
158append-lfs-flags() { 137append-lfs-flags() {
159 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 138 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
160 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 139 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
161} 140}
162 141
142# @FUNCTION: append-flags
143# @USAGE: <flags>
144# @DESCRIPTION:
145# Add extra <flags> to your current C[XX]FLAGS.
163append-flags() { 146append-flags() {
164 [[ -z $* ]] && return 0 147 [[ -z $* ]] && return 0
165 export CFLAGS="${CFLAGS} $*" 148 export CFLAGS="${CFLAGS} $*"
166 export CXXFLAGS="${CXXFLAGS} $*" 149 export CXXFLAGS="${CXXFLAGS} $*"
167 [ -n "`is-flag -fno-stack-protector`" -o \
168 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
169 return 0 150 return 0
170} 151}
171 152
153# @FUNCTION: replace-flags
154# @USAGE: <old> <new>
155# @DESCRIPTION:
156# Replace the <old> flag with <new>. Accepts shell globs for <old>.
172replace-flags() { 157replace-flags() {
173 [[ $# != 2 ]] \ 158 [[ $# != 2 ]] \
174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 159 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
175 && die "replace-flags takes 2 arguments, not $#" 160 && die "replace-flags takes 2 arguments, not $#"
176 161
191 done 176 done
192 177
193 return 0 178 return 0
194} 179}
195 180
181# @FUNCTION: replace-cpu-flags
182# @USAGE: <old> <new>
183# @DESCRIPTION:
184# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
185# with flags that select the <new> cpu. Accepts shell globs for <old>.
196replace-cpu-flags() { 186replace-cpu-flags() {
197 local newcpu="$#" ; newcpu="${!newcpu}" 187 local newcpu="$#" ; newcpu="${!newcpu}"
198 while [ $# -gt 1 ] ; do 188 while [ $# -gt 1 ] ; do
199 # quote to make sure that no globbing is done (particularly on 189 # quote to make sure that no globbing is done (particularly on
200 # ${oldcpu} prior to calling replace-flags 190 # ${oldcpu}) prior to calling replace-flags
201 replace-flags "-march=${1}" "-march=${newcpu}" 191 replace-flags "-march=${1}" "-march=${newcpu}"
202 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 192 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
203 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 193 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
204 shift 194 shift
205 done 195 done
206 return 0 196 return 0
207} 197}
208 198
199_is_flagq() {
200 local x
201 for x in ${!1} ; do
202 [[ ${x} == $2 ]] && return 0
203 done
204 return 1
205}
206
207# @FUNCTION: is-flagq
208# @USAGE: <flag>
209# @DESCRIPTION:
210# Returns shell true if <flag> is in C[XX]FLAGS, else returns shell false. Accepts shell globs.
211is-flagq() {
212 [[ -n $2 ]] && die "Usage: is-flag <flag>"
213 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1
214}
215
216# @FUNCTION: is-flag
217# @USAGE: <flag>
218# @DESCRIPTION:
219# Echo's "true" if flag is set in C[XX]FLAGS. Accepts shell globs.
209is-flag() { 220is-flag() {
210 local x 221 is-flagq "$@" && 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} 222}
221 223
224# @FUNCTION: is-ldflagq
225# @USAGE: <flag>
226# @DESCRIPTION:
227# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
228is-ldflagq() {
229 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
230 _is_flagq LDFLAGS $1
231}
232
233# @FUNCTION: is-ldflag
234# @USAGE: <flag>
235# @DESCRIPTION:
236# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
237is-ldflag() {
238 is-ldflagq "$@" && echo true
239}
240
241# @FUNCTION: filter-mfpmath
242# @USAGE: <math types>
243# @DESCRIPTION:
244# Remove specified math types from the fpmath flag. For example, if the user
245# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
246# -mfpmath=386.
222filter-mfpmath() { 247filter-mfpmath() {
223 local orig_mfpmath new_math prune_math 248 local orig_mfpmath new_math prune_math
224 249
225 # save the original -mfpmath flag 250 # save the original -mfpmath flag
226 orig_mfpmath="`get-flag -mfpmath`" 251 orig_mfpmath=$(get-flag -mfpmath)
227 # get the value of the current -mfpmath flag 252 # get the value of the current -mfpmath flag
228 new_math=" `get-flag mfpmath | tr , ' '` " 253 new_math=$(get-flag mfpmath)
254 new_math=" ${new_math//,/ } "
229 # figure out which math values are to be removed 255 # figure out which math values are to be removed
230 prune_math="" 256 prune_math=""
231 for prune_math in "$@" ; do 257 for prune_math in "$@" ; do
232 new_math="${new_math/ ${prune_math} / }" 258 new_math=${new_math/ ${prune_math} / }
233 done 259 done
234 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 260 new_math=$(echo ${new_math})
261 new_math=${new_math// /,}
235 262
236 if [ -z "${new_math}" ] ; then 263 if [[ -z ${new_math} ]] ; then
237 # if we're removing all user specified math values are 264 # if we're removing all user specified math values are
238 # slated for removal, then we just filter the flag 265 # slated for removal, then we just filter the flag
239 filter-flags ${orig_mfpmath} 266 filter-flags ${orig_mfpmath}
240 else 267 else
241 # if we only want to filter some of the user specified 268 # if we only want to filter some of the user specified
243 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 270 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
244 fi 271 fi
245 return 0 272 return 0
246} 273}
247 274
275# @FUNCTION: strip-flags
276# @DESCRIPTION:
277# Strip C[XX]FLAGS of everything except known good/safe flags.
248strip-flags() { 278strip-flags() {
249 local x y flag NEW_CFLAGS NEW_CXXFLAGS 279 local x y flag NEW_CFLAGS NEW_CXXFLAGS
250 280
251 setup-allowed-flags 281 setup-allowed-flags
252 282
305 local PROG=$(tc-get${comp}) 335 local PROG=$(tc-get${comp})
306 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 336 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
307 > /dev/null 2>&1 337 > /dev/null 2>&1
308} 338}
309 339
310# Returns true if C compiler support given flag 340# @FUNCTION: test-flag-CC
341# @USAGE: <flag>
342# @DESCRIPTION:
343# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
311test-flag-CC() { test-flag-PROG "CC" "$1"; } 344test-flag-CC() { test-flag-PROG "CC" "$1"; }
312 345
313# Returns true if C++ compiler support given flag 346# @FUNCTION: test-flag-CXX
347# @USAGE: <flag>
348# @DESCRIPTION:
349# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
314test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 350test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
315 351
316test-flags-PROG() { 352test-flags-PROG() {
317 local comp=$1 353 local comp=$1
318 local flags 354 local flags
319 local x 355 local x
320 356
321 shift 357 shift
322 358
323 [[ -z ${comp} ]] && \ 359 [[ -z ${comp} ]] && return 1
324 return 1
325 360
361 x=""
326 for x in "$@" ; do 362 for x in "$@" ; do
327 test-flag-${comp} "${x}" && flags="${flags} ${x}" 363 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
328 done 364 done
329 365
330 echo "${flags}" 366 echo "${flags}"
331 367
332 # Just bail if we dont have any flags 368 # Just bail if we dont have any flags
333 [[ -n ${flags} ]] 369 [[ -n ${flags} ]]
334} 370}
335 371
336# Returns (echo's) the given flags supported by the C compiler 372# @FUNCTION: test-flags-CC
373# @USAGE: <flags>
374# @DESCRIPTION:
375# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
337test-flags-CC() { test-flags-PROG "CC" "$@"; } 376test-flags-CC() { test-flags-PROG "CC" "$@"; }
338 377
339# Returns (echo's) the given flags supported by the C++ compiler 378# @FUNCTION: test-flags-CXX
379# @USAGE: <flags>
380# @DESCRIPTION:
381# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
340test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 382test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
341 383
384# @FUNCTION: test-flags
385# @USAGE: <flags>
386# @DESCRIPTION:
342# Short-hand that should hopefully work for both C and C++ compiler, but 387# Short-hand that should hopefully work for both C and C++ compiler, but
343# its really only present due to the append-flags() abomination. 388# its really only present due to the append-flags() abomination.
344test-flags() { test-flags-CC "$@"; } 389test-flags() { test-flags-CC "$@"; }
345 390
346# Depriciated, use test-flags() 391# @FUNCTION: test_flag
392# @DESCRIPTION:
393# DEPRICIATED, use test-flags()
347test_flag() { 394test_flag() {
348 addwrite "/dev/stderr"
349 ewarn "test_flag: deprecated, please use test-flags()!" >/dev/stderr 395 ewarn "test_flag: deprecated, please use test-flags()!" >&2
350 396
351 test-flags-CC "$@" 397 test-flags-CC "$@"
352} 398}
353 399
400# @FUNCTION: test_version_info
401# @USAGE: <version>
402# @DESCRIPTION:
403# Returns shell true if the current C compiler version matches <version>, else returns shell false.
404# Accepts shell globs.
354test_version_info() { 405test_version_info() {
355 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 406 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
356 return 0 407 return 0
357 else 408 else
358 return 1 409 return 1
359 fi 410 fi
360} 411}
361 412
413# @FUNCTION: strip-unsupported-flags
414# @DESCRIPTION:
415# Strip C[XX]FLAGS of any flags not supported by the active toolchain.
362strip-unsupported-flags() { 416strip-unsupported-flags() {
363 local x NEW_CFLAGS NEW_CXXFLAGS 417 export CFLAGS=$(test-flags-CC ${CFLAGS})
364 418 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
365 for x in ${CFLAGS} ; do
366 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
367 done
368 for x in ${CXXFLAGS} ; do
369 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
370 done
371
372 export CFLAGS=${NEW_CFLAGS}
373 export CXXFLAGS=${NEW_CXXFLAGS}
374} 419}
375 420
421# @FUNCTION: get-flag
422# @USAGE: <flag>
423# @DESCRIPTION:
424# Find and echo the value for a particular flag. Accepts shell globs.
376get-flag() { 425get-flag() {
377 local f findflag="$1" 426 local f findflag="$1"
378 427
379 # this code looks a little flaky but seems to work for 428 # this code looks a little flaky but seems to work for
380 # everything we want ... 429 # everything we want ...
388 fi 437 fi
389 done 438 done
390 return 1 439 return 1
391} 440}
392 441
442# @FUNCTION: has_hardened
443# @DESCRIPTION:
393# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 444# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
394has_hardened() { 445has_hardened() {
395 addwrite "/dev/stderr"
396 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" \ 446 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
397 >/dev/stderr
398 447
399 test_version_info Hardened && return 0 448 test_version_info Hardened && return 0
400 # The specs file wont exist unless gcc has GCC_SPECS support 449 # The specs file wont exist unless gcc has GCC_SPECS support
401 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 450 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
402} 451}
403 452
453# @FUNCTION: has_pic
454# @DESCRIPTION:
404# DEPRECATED - use gcc-specs-pie from toolchain-funcs 455# DEPRECATED - use gcc-specs-pie from toolchain-funcs
405# indicate whether PIC is set 456# indicate whether PIC is set
406has_pic() { 457has_pic() {
407 addwrite "/dev/stderr"
408 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >/dev/stderr 458 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
409 459
410 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 460 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
411 ${CFLAGS/-fpic} != ${CFLAGS} || \ 461 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
412 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]] 462 gcc-specs-pie
413} 463}
414 464
465# @FUNCTION: has_pie
466# @DESCRIPTION:
415# DEPRECATED - use gcc-specs-pie from toolchain-funcs 467# DEPRECATED - use gcc-specs-pie from toolchain-funcs
416# indicate whether PIE is set 468# indicate whether PIE is set
417has_pie() { 469has_pie() {
418 addwrite "/dev/stderr"
419 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >/dev/stderr 470 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
420 471
421 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 472 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
422 ${CFLAGS/-fpie} != ${CFLAGS} || \ 473 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
423 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__) || \ 474 gcc-specs-pie
424 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
425 # test PIC while waiting for specs to be updated to generate __PIE__
426} 475}
427 476
477# @FUNCTION: has_ssp_all
478# @DESCRIPTION:
428# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 479# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
429# indicate whether code for SSP is being generated for all functions 480# indicate whether code for SSP is being generated for all functions
430has_ssp_all() { 481has_ssp_all() {
431 addwrite "/dev/stderr"
432 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >/dev/stderr 482 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
433 483
434 # note; this matches only -fstack-protector-all 484 # note; this matches only -fstack-protector-all
435 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 485 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
436 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 486 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
437 gcc-specs-ssp 487 gcc-specs-ssp-all
438} 488}
439 489
490# @FUNCTION: has_ssp
491# @DESCRIPTION:
440# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 492# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
441# indicate whether code for SSP is being generated 493# indicate whether code for SSP is being generated
442has_ssp() { 494has_ssp() {
443 addwrite "/dev/stderr"
444 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >/dev/stderr 495 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
445 496
446 # note; this matches both -fstack-protector and -fstack-protector-all 497 # note; this matches both -fstack-protector and -fstack-protector-all
447 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 498 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
448 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 499 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
449 gcc-specs-ssp 500 gcc-specs-ssp
450} 501}
451 502
503# @FUNCTION: has_m64
504# @DESCRIPTION:
505# This doesn't test if the flag is accepted, it tests if the flag actually
506# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
507# return code is 0, else the return code is 1.
452has_m64() { 508has_m64() {
453 # this doesnt test if the flag is accepted, it tests if the flag 509 # this doesnt test if the flag is accepted, it tests if the flag
454 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 510 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
455 # please dont replace this function with test_flag in some future 511 # please dont replace this function with test_flag in some future
456 # clean-up! 512 # clean-up!
463 rm -f "${temp}".c 519 rm -f "${temp}".c
464 [[ ${ret} != 1 ]] && return 0 520 [[ ${ret} != 1 ]] && return 0
465 return 1 521 return 1
466} 522}
467 523
524# @FUNCTION: has_m32
525# @DESCRIPTION:
526# This doesn't test if the flag is accepted, it tests if the flag actually
527# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
528# code is 0, else return code is 1.
468has_m32() { 529has_m32() {
469 # this doesnt test if the flag is accepted, it tests if the flag 530 # this doesnt test if the flag is accepted, it tests if the flag
470 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 531 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
471 # please dont replace this function with test_flag in some future 532 # please dont replace this function with test_flag in some future
472 # clean-up! 533 # clean-up!
481 rm -f "${temp}".c 542 rm -f "${temp}".c
482 [[ ${ret} != 1 ]] && return 0 543 [[ ${ret} != 1 ]] && return 0
483 return 1 544 return 1
484} 545}
485 546
547# @FUNCTION: replace-sparc64-flags
548# @DESCRIPTION:
549# Sets mcpu to v8 and uses the original value as mtune if none specified.
486replace-sparc64-flags() { 550replace-sparc64-flags() {
487 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 551 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
488 552
489 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 553 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
490 for x in ${SPARC64_CPUS}; do 554 for x in ${SPARC64_CPUS}; do
491 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 555 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
492 done 556 done
493 else 557 else
494 for x in ${SPARC64_CPUS}; do 558 for x in ${SPARC64_CPUS}; do
495 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 559 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
496 done 560 done
497 fi 561 fi
498 562
499 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 563 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
500 for x in ${SPARC64_CPUS}; do 564 for x in ${SPARC64_CPUS}; do
501 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 565 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
502 done 566 done
503 else 567 else
504 for x in ${SPARC64_CPUS}; do 568 for x in ${SPARC64_CPUS}; do
505 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 569 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
506 done 570 done
507 fi 571 fi
508 572
509 export CFLAGS CXXFLAGS 573 export CFLAGS CXXFLAGS
510} 574}
511 575
576# @FUNCTION: append-ldflags
577# @USAGE: <flags>
578# @DESCRIPTION:
579# Add extra <flags> to the current LDFLAGS.
512append-ldflags() { 580append-ldflags() {
581 [[ -z $* ]] && return 0
582 local flag
583 for flag in "$@"; do
584 [[ ${flag} == -l* ]] && \
585 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
586 done
587
513 export LDFLAGS="${LDFLAGS} $*" 588 export LDFLAGS="${LDFLAGS} $*"
514 return 0 589 return 0
515} 590}
516 591
592# @FUNCTION: filter-ldflags
593# @USAGE: <flags>
594# @DESCRIPTION:
595# Remove particular <flags> from LDFLAGS. Accepts shell globs.
517filter-ldflags() { 596filter-ldflags() {
518 local x 597 _filter-var LDFLAGS "$@"
598 return 0
599}
519 600
520 # we do this fancy spacing stuff so as to not filter 601# @FUNCTION: raw-ldflags
521 # out part of a flag ... we want flag atoms ! :D 602# @USAGE: <flags>
522 LDFLAGS=" ${LDFLAGS} " 603# @DESCRIPTION:
604# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
605# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
606# to gcc where it needs the '-Wl,'.
607raw-ldflags() {
608 local x input="$@"
609 [[ -z ${input} ]] && input=${LDFLAGS}
610 set --
523 for x in "$@" ; do 611 for x in ${input} ; do
524 LDFLAGS=${LDFLAGS// ${x} / } 612 x=${x#-Wl,}
613 set -- "$@" ${x//,/ }
525 done 614 done
526 [[ -z ${LDFLAGS// } ]] \ 615 echo "$@"
527 && LDFLAGS="" \
528 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
529 export LDFLAGS
530 return 0
531} 616}
532 617
533fstack-flags() { 618# @FUNCTION: bindnow-flags
534 if gcc-specs-ssp; then 619# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
535 [ -z "`is-flag -fno-stack-protector`" ] && 620# @DESCRIPTION:
536 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
537 fi
538 return 0
539}
540
541# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
542# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
543# fixes.
544#
545# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
546gcc2-flags() {
547 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
548 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
549 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
550 fi
551
552 replace-cpu-flags k6-{2,3} k6
553 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
554
555 replace-cpu-flags pentium-mmx i586
556 replace-cpu-flags pentium{2,3,4} i686
557
558 replace-cpu-flags ev6{7,8} ev6
559
560 export CFLAGS CXXFLAGS
561}
562
563# Gets the flags needed for "NOW" binding 621# DEPRECATED - Gets the flags needed for "NOW" binding
564bindnow-flags() { 622bindnow-flags() {
623 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" >&2
624
565 case $($(tc-getLD) -v 2>&1 </dev/null) in 625 case $($(tc-getLD) -v 2>&1 </dev/null) in
566 *GNU* | *'with BFD'*) # GNU ld 626 *GNU* | *'with BFD'*) # GNU ld
567 echo "-Wl,-z,now" ;; 627 echo "-Wl,-z,now" ;;
568 *Apple*) # Darwin ld 628 *Apple*) # Darwin ld
569 echo "-bind_at_load" ;; 629 echo "-bind_at_load" ;;
574 echo "-Wl,-z,now" ;; 634 echo "-Wl,-z,now" ;;
575 esac 635 esac
576 ;; 636 ;;
577 esac 637 esac
578} 638}
639
640
641# Some tests for when we screw with things and want to make
642# sure we didn't break anything
643#TESTS() {
644# CFLAGS="-a -b -c=1"
645# CXXFLAGS="-x -y -z=2"
646# LDFLAGS="-l -m -n=3"
647#
648# die() { exit 1; }
649# (is-flag 1 2 3) && die
650# (is-ldflag 1 2 3) && die
651#
652# is-flagq -l && die
653# is-ldflagq -a && die
654# is-flagq -a || die
655# is-flagq -x || die
656# is-ldflagq -n=* || die
657# is-ldflagq -n && die
658#
659# strip-unsupported-flags
660# [[ ${CFLAGS} == "-c=1" ]] || die
661# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
662#
663# echo "All tests pass"
664#}
665#TESTS

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