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1# Copyright 1999-2005 Gentoo Foundation 1# Copyright 1999-2011 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.107 2006/04/15 00:44:16 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.159 2011/12/07 06:42:40 vapier 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[q] <flag> ####
25# Returns "true" if flag is set in C[XX]FLAGS
26# Matches only complete a flag
27# q version sets return code but doesn't echo
28#
29#### is-ldflag[q] <flag> ####
30# Returns "true" if flag is set in LDFLAGS
31# Matches only complete a flag
32# q version sets return code but doesn't echo
33#
34#### strip-flags ####
35# Strip C[XX]FLAGS of everything except known
36# good options.
37#
38#### strip-unsupported-flags ####
39# Strip C[XX]FLAGS of any flags not supported by
40# installed version of gcc
41#
42#### get-flag <flag> ####
43# Find and echo the value for a particular flag
44#
45#### replace-sparc64-flags ####
46# Sets mcpu to v8 and uses the original value
47# as mtune if none specified.
48#
49#### filter-mfpmath <math types> ####
50# Remove specified math types from the fpmath specification
51# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
52# will leave the user with -mfpmath=386
53#
54#### append-ldflags ####
55# Add extra flags to your current LDFLAGS
56#
57#### filter-ldflags <flags> ####
58# Remove particular flags from LDFLAGS
59# Matches only complete flags
60#
61#### bindnow-flags ####
62# Returns the flags to enable "now" binding in the current selected linker.
63#
64################ DEPRECATED functions ################ 15################ DEPRECATED functions ################
65# The following are still present to avoid breaking existing 16# The following are still present to avoid breaking existing
66# code more than necessary; however they are deprecated. Please 17# code more than necessary; however they are deprecated. Please
67# use gcc-specs-* from toolchain-funcs.eclass instead, if you 18# use gcc-specs-* from toolchain-funcs.eclass instead, if you
68# need to know which hardened techs are active in the compiler. 19# need to know which hardened techs are active in the compiler.
69# See bug #100974 20# See bug #100974
70# 21#
71#### has_hardened #### 22# has_hardened
72# Returns true if the compiler has 'Hardened' in its version string, 23# has_pie
73# (note; switched-spec vanilla compilers satisfy this condition) or 24# has_pic
74# the specs file name contains 'hardened'.
75#
76#### has_pie ####
77# Returns true if the compiler by default or with current CFLAGS
78# builds position-independent code.
79#
80#### has_pic ####
81# Returns true if the compiler by default or with current CFLAGS
82# builds position-independent code.
83#
84#### has_ssp_all #### 25# has_ssp_all
85# Returns true if the compiler by default or with current CFLAGS 26# has_ssp
86# generates stack smash protections for all functions
87#
88#### has_ssp ####
89# Returns true if the compiler by default or with current CFLAGS
90# generates stack smash protections for most vulnerable functions
91#
92 27
28
93# 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
94setup-allowed-flags() { 31setup-allowed-flags() {
95 if [[ -z ${ALLOWED_FLAGS} ]] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
96 export ALLOWED_FLAGS="-pipe" 33 export ALLOWED_FLAGS="-pipe"
97 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive"
40 export ALLOWED_FLAGS="${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 -fno-omit-frame-pointer"
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-ssse3 -mno-sse4 -mno-sse4.1 \
47 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
48 -mno-popcnt -mno-abm \
108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \ 51 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 54 -m32 -m64 -mx32 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
56 -msecure-plt -m*-toc -D* -U*"
115 57
58 # 4.5
59 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60 # 4.6
61 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
62 -mno-bmi -mno-tbm"
63
116 # C[XX]FLAGS that we are think is ok, but needs testing 64 # {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 65 # NOTE: currently -Os have issues with gcc3 and K6* arch's
118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 66 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
119 return 0 67 return 0
120} 68}
121 69
131 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 79 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
132 gcc-specs-pie || continue 80 gcc-specs-pie || continue
133 is-flagq -nopie || append-flags -nopie;; 81 is-flagq -nopie || append-flags -nopie;;
134 -fstack-protector) 82 -fstack-protector)
135 gcc-specs-ssp || continue 83 gcc-specs-ssp || continue
136 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 84 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
137 -fstack-protector-all) 85 -fstack-protector-all)
138 gcc-specs-ssp-to-all || continue 86 gcc-specs-ssp-to-all || continue
139 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 87 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
88 -fno-strict-overflow)
89 gcc-specs-nostrict || continue
90 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
140 esac 91 esac
141 done 92 done
142} 93}
143 94
144# Remove occurrences of strings from variable given in $1 95# Remove occurrences of strings from variable given in $1
159 eval new\[\${\#new\[@]}]=\${f} 110 eval new\[\${\#new\[@]}]=\${f}
160 done 111 done
161 eval export ${VAR}=\${new\[*]} 112 eval export ${VAR}=\${new\[*]}
162} 113}
163 114
115# @FUNCTION: filter-flags
116# @USAGE: <flags>
117# @DESCRIPTION:
118# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
164filter-flags() { 119filter-flags() {
165 _filter-hardened "$@" 120 _filter-hardened "$@"
166 _filter-var CFLAGS "$@" 121 _filter-var CFLAGS "$@"
122 _filter-var CPPFLAGS "$@"
167 _filter-var CXXFLAGS "$@" 123 _filter-var CXXFLAGS "$@"
124 _filter-var FFLAGS "$@"
125 _filter-var FCFLAGS "$@"
168 return 0 126 return 0
169} 127}
170 128
129# @FUNCTION: filter-lfs-flags
130# @DESCRIPTION:
131# Remove flags that enable Large File Support.
171filter-lfs-flags() { 132filter-lfs-flags() {
172 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 133 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
134 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
135 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
136 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
137 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
173 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 138 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
174} 139}
175 140
141# @FUNCTION: append-cppflags
142# @USAGE: <flags>
143# @DESCRIPTION:
144# Add extra <flags> to the current CPPFLAGS.
145append-cppflags() {
146 [[ $# -eq 0 ]] && return 0
147 export CPPFLAGS="${CPPFLAGS} $*"
148 return 0
149}
150
151# @FUNCTION: append-cflags
152# @USAGE: <flags>
153# @DESCRIPTION:
154# Add extra <flags> to the current CFLAGS.
155append-cflags() {
156 [[ $# -eq 0 ]] && return 0
157 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
158 return 0
159}
160
161# @FUNCTION: append-cxxflags
162# @USAGE: <flags>
163# @DESCRIPTION:
164# Add extra <flags> to the current CXXFLAGS.
165append-cxxflags() {
166 [[ $# -eq 0 ]] && return 0
167 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
168 return 0
169}
170
171# @FUNCTION: append-fflags
172# @USAGE: <flags>
173# @DESCRIPTION:
174# Add extra <flags> to the current {F,FC}FLAGS.
175append-fflags() {
176 [[ $# -eq 0 ]] && return 0
177 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
178 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
179 return 0
180}
181
182# @FUNCTION: append-lfs-flags
183# @DESCRIPTION:
184# Add flags that enable Large File Support.
176append-lfs-flags() { 185append-lfs-flags() {
177 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 186 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
187 # see comments in filter-lfs-flags func for meaning of these
178 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 188 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
179} 189}
180 190
191# @FUNCTION: append-flags
192# @USAGE: <flags>
193# @DESCRIPTION:
194# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
181append-flags() { 195append-flags() {
182 [[ -z $* ]] && return 0 196 [[ $# -eq 0 ]] && return 0
183 export CFLAGS="${CFLAGS} $*" 197 append-cflags "$@"
184 export CXXFLAGS="${CXXFLAGS} $*" 198 append-cxxflags "$@"
199 append-fflags "$@"
185 return 0 200 return 0
186} 201}
187 202
203# @FUNCTION: replace-flags
204# @USAGE: <old> <new>
205# @DESCRIPTION:
206# Replace the <old> flag with <new>. Accepts shell globs for <old>.
188replace-flags() { 207replace-flags() {
189 [[ $# != 2 ]] \ 208 [[ $# != 2 ]] \
190 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 209 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
191 && die "replace-flags takes 2 arguments, not $#" 210 && die "replace-flags takes 2 arguments, not $#"
192 211
193 local f fset 212 local f fset
194 declare -a new_CFLAGS new_CXXFLAGS 213 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
195 214
196 for fset in CFLAGS CXXFLAGS; do 215 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
197 # Looping over the flags instead of using a global 216 # Looping over the flags instead of using a global
198 # substitution ensures that we're working with flag atoms. 217 # substitution ensures that we're working with flag atoms.
199 # Otherwise globs like -O* have the potential to wipe out the 218 # Otherwise globs like -O* have the potential to wipe out the
200 # list of flags. 219 # list of flags.
201 for f in ${!fset}; do 220 for f in ${!fset}; do
207 done 226 done
208 227
209 return 0 228 return 0
210} 229}
211 230
231# @FUNCTION: replace-cpu-flags
232# @USAGE: <old> <new>
233# @DESCRIPTION:
234# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
235# with flags that select the <new> cpu. Accepts shell globs for <old>.
212replace-cpu-flags() { 236replace-cpu-flags() {
213 local newcpu="$#" ; newcpu="${!newcpu}" 237 local newcpu="$#" ; newcpu="${!newcpu}"
214 while [ $# -gt 1 ] ; do 238 while [ $# -gt 1 ] ; do
215 # quote to make sure that no globbing is done (particularly on 239 # quote to make sure that no globbing is done (particularly on
216 # ${oldcpu} prior to calling replace-flags 240 # ${oldcpu}) prior to calling replace-flags
217 replace-flags "-march=${1}" "-march=${newcpu}" 241 replace-flags "-march=${1}" "-march=${newcpu}"
218 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 242 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
219 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 243 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
220 shift 244 shift
221 done 245 done
222 return 0 246 return 0
223} 247}
224 248
249_is_flagq() {
250 local x
251 for x in ${!1} ; do
252 [[ ${x} == $2 ]] && return 0
253 done
254 return 1
255}
256
257# @FUNCTION: is-flagq
258# @USAGE: <flag>
259# @DESCRIPTION:
260# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
225is-flagq() { 261is-flagq() {
226 local x 262 [[ -n $2 ]] && die "Usage: is-flag <flag>"
227 263 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
228 for x in ${CFLAGS} ${CXXFLAGS} ; do
229 # Note this should work with globs like -mcpu=ultrasparc*
230 if [[ ${x} == ${1} ]]; then
231 return 0
232 fi
233 done
234 return 1
235} 264}
236 265
266# @FUNCTION: is-flag
267# @USAGE: <flag>
268# @DESCRIPTION:
269# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
237is-flag() { 270is-flag() {
238 if is-flagq ${1}; then 271 is-flagq "$@" && echo true
239 echo true
240 return 0
241 fi
242 return 1
243} 272}
244 273
274# @FUNCTION: is-ldflagq
275# @USAGE: <flag>
276# @DESCRIPTION:
277# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
245is-ldflagq() { 278is-ldflagq() {
246 local x 279 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
247 280 _is_flagq LDFLAGS $1
248 for x in ${LDFLAGS} ; do
249 # Note this should work with globs like -mcpu=ultrasparc*
250 if [[ ${x} == ${1} ]]; then
251 return 0
252 fi
253 done
254 return 1
255} 281}
256 282
283# @FUNCTION: is-ldflag
284# @USAGE: <flag>
285# @DESCRIPTION:
286# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
257is-ldflag() { 287is-ldflag() {
258 if is-ldflagq ${1}; then 288 is-ldflagq "$@" && echo true
259 echo true
260 return 0
261 fi
262 return 1
263} 289}
264 290
291# @FUNCTION: filter-mfpmath
292# @USAGE: <math types>
293# @DESCRIPTION:
294# Remove specified math types from the fpmath flag. For example, if the user
295# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
296# -mfpmath=386.
265filter-mfpmath() { 297filter-mfpmath() {
266 local orig_mfpmath new_math prune_math 298 local orig_mfpmath new_math prune_math
267 299
268 # save the original -mfpmath flag 300 # save the original -mfpmath flag
269 orig_mfpmath="`get-flag -mfpmath`" 301 orig_mfpmath=$(get-flag -mfpmath)
270 # get the value of the current -mfpmath flag 302 # get the value of the current -mfpmath flag
271 new_math=" `get-flag mfpmath | tr , ' '` " 303 new_math=$(get-flag mfpmath)
304 new_math=" ${new_math//,/ } "
272 # figure out which math values are to be removed 305 # figure out which math values are to be removed
273 prune_math="" 306 prune_math=""
274 for prune_math in "$@" ; do 307 for prune_math in "$@" ; do
275 new_math="${new_math/ ${prune_math} / }" 308 new_math=${new_math/ ${prune_math} / }
276 done 309 done
277 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 310 new_math=$(echo ${new_math})
311 new_math=${new_math// /,}
278 312
279 if [ -z "${new_math}" ] ; then 313 if [[ -z ${new_math} ]] ; then
280 # if we're removing all user specified math values are 314 # if we're removing all user specified math values are
281 # slated for removal, then we just filter the flag 315 # slated for removal, then we just filter the flag
282 filter-flags ${orig_mfpmath} 316 filter-flags ${orig_mfpmath}
283 else 317 else
284 # if we only want to filter some of the user specified 318 # if we only want to filter some of the user specified
286 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 320 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
287 fi 321 fi
288 return 0 322 return 0
289} 323}
290 324
325# @FUNCTION: strip-flags
326# @DESCRIPTION:
327# Strip C[XX]FLAGS of everything except known good/safe flags.
291strip-flags() { 328strip-flags() {
292 local x y flag NEW_CFLAGS NEW_CXXFLAGS 329 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
293 330
294 setup-allowed-flags 331 setup-allowed-flags
295 332
296 local NEW_CFLAGS="" 333 local NEW_CFLAGS=""
297 local NEW_CXXFLAGS="" 334 local NEW_CXXFLAGS=""
335 local NEW_FFLAGS=""
336 local NEW_FCFLAGS=""
298 337
299 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 338 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
300 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 339 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
301 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 340 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
302 fi 341 fi
303 342
304 set -f # disable pathname expansion 343 set -f # disable pathname expansion
305 344
321 break 360 break
322 fi 361 fi
323 done 362 done
324 done 363 done
325 364
365 for x in ${FFLAGS}; do
366 for y in ${ALLOWED_FLAGS}; do
367 flag=${x%%=*}
368 if [ "${flag%%${y}}" = "" ] ; then
369 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
370 break
371 fi
372 done
373 done
374
375 for x in ${FCFLAGS}; do
376 for y in ${ALLOWED_FLAGS}; do
377 flag=${x%%=*}
378 if [ "${flag%%${y}}" = "" ] ; then
379 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
380 break
381 fi
382 done
383 done
384
326 # In case we filtered out all optimization flags fallback to -O2 385 # In case we filtered out all optimization flags fallback to -O2
327 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 386 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
328 NEW_CFLAGS="${NEW_CFLAGS} -O2" 387 NEW_CFLAGS="${NEW_CFLAGS} -O2"
329 fi 388 fi
330 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 389 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
331 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 390 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
332 fi 391 fi
392 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
393 NEW_FFLAGS="${NEW_FFLAGS} -O2"
394 fi
395 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
396 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
397 fi
333 398
334 set +f # re-enable pathname expansion 399 set +f # re-enable pathname expansion
335 400
336 export CFLAGS="${NEW_CFLAGS}" 401 export CFLAGS="${NEW_CFLAGS}"
337 export CXXFLAGS="${NEW_CXXFLAGS}" 402 export CXXFLAGS="${NEW_CXXFLAGS}"
403 export FFLAGS="${NEW_FFLAGS}"
404 export FCFLAGS="${NEW_FCFLAGS}"
338 return 0 405 return 0
339} 406}
340 407
341test-flag-PROG() { 408test-flag-PROG() {
342 local comp=$1 409 local comp=$1
343 local flags="$2" 410 local flags="$2"
344 411
345 [[ -z ${comp} || -z ${flags} ]] && \ 412 [[ -z ${comp} || -z ${flags} ]] && return 1
346 return 1
347 413
414 # use -c so we can test the assembler as well
348 local PROG=$(tc-get${comp}) 415 local PROG=$(tc-get${comp})
349 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 416 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
350 > /dev/null 2>&1 417 > /dev/null 2>&1
351} 418}
352 419
353# Returns true if C compiler support given flag 420# @FUNCTION: test-flag-CC
421# @USAGE: <flag>
422# @DESCRIPTION:
423# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
354test-flag-CC() { test-flag-PROG "CC" "$1"; } 424test-flag-CC() { test-flag-PROG "CC" "$1"; }
355 425
356# Returns true if C++ compiler support given flag 426# @FUNCTION: test-flag-CXX
427# @USAGE: <flag>
428# @DESCRIPTION:
429# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
357test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 430test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
431
432# @FUNCTION: test-flag-F77
433# @USAGE: <flag>
434# @DESCRIPTION:
435# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
436test-flag-F77() { test-flag-PROG "F77" "$1"; }
437
438# @FUNCTION: test-flag-FC
439# @USAGE: <flag>
440# @DESCRIPTION:
441# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
442test-flag-FC() { test-flag-PROG "FC" "$1"; }
358 443
359test-flags-PROG() { 444test-flags-PROG() {
360 local comp=$1 445 local comp=$1
361 local flags 446 local flags
362 local x 447 local x
363 448
364 shift 449 shift
365 450
366 [[ -z ${comp} ]] && \ 451 [[ -z ${comp} ]] && return 1
367 return 1
368 452
369 for x in "$@" ; do 453 for x in "$@" ; do
370 test-flag-${comp} "${x}" && flags="${flags} ${x}" 454 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
371 done 455 done
372 456
373 echo "${flags}" 457 echo "${flags}"
374 458
375 # Just bail if we dont have any flags 459 # Just bail if we dont have any flags
376 [[ -n ${flags} ]] 460 [[ -n ${flags} ]]
377} 461}
378 462
379# Returns (echo's) the given flags supported by the C compiler 463# @FUNCTION: test-flags-CC
464# @USAGE: <flags>
465# @DESCRIPTION:
466# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
380test-flags-CC() { test-flags-PROG "CC" "$@"; } 467test-flags-CC() { test-flags-PROG "CC" "$@"; }
381 468
382# Returns (echo's) the given flags supported by the C++ compiler 469# @FUNCTION: test-flags-CXX
470# @USAGE: <flags>
471# @DESCRIPTION:
472# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
383test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 473test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
384 474
475# @FUNCTION: test-flags-F77
476# @USAGE: <flags>
477# @DESCRIPTION:
478# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
479test-flags-F77() { test-flags-PROG "F77" "$@"; }
480
481# @FUNCTION: test-flags-FC
482# @USAGE: <flags>
483# @DESCRIPTION:
484# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
485test-flags-FC() { test-flags-PROG "FC" "$@"; }
486
487# @FUNCTION: test-flags
488# @USAGE: <flags>
489# @DESCRIPTION:
385# Short-hand that should hopefully work for both C and C++ compiler, but 490# Short-hand that should hopefully work for both C and C++ compiler, but
386# its really only present due to the append-flags() abomination. 491# its really only present due to the append-flags() abomination.
387test-flags() { test-flags-CC "$@"; } 492test-flags() { test-flags-CC "$@"; }
388 493
389# Depriciated, use test-flags() 494# @FUNCTION: test_version_info
390test_flag() { 495# @USAGE: <version>
391 ewarn "test_flag: deprecated, please use test-flags()!" >&2 496# @DESCRIPTION:
392 497# Returns shell true if the current C compiler version matches <version>, else returns shell false.
393 test-flags-CC "$@" 498# Accepts shell globs.
394}
395
396test_version_info() { 499test_version_info() {
397 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 500 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
398 return 0 501 return 0
399 else 502 else
400 return 1 503 return 1
401 fi 504 fi
402} 505}
403 506
507# @FUNCTION: strip-unsupported-flags
508# @DESCRIPTION:
509# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
404strip-unsupported-flags() { 510strip-unsupported-flags() {
405 local x NEW_CFLAGS NEW_CXXFLAGS 511 export CFLAGS=$(test-flags-CC ${CFLAGS})
406 512 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
407 for x in ${CFLAGS} ; do 513 export FFLAGS=$(test-flags-F77 ${FFLAGS})
408 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})" 514 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
409 done
410 for x in ${CXXFLAGS} ; do
411 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
412 done
413
414 export CFLAGS=${NEW_CFLAGS}
415 export CXXFLAGS=${NEW_CXXFLAGS}
416} 515}
417 516
517# @FUNCTION: get-flag
518# @USAGE: <flag>
519# @DESCRIPTION:
520# Find and echo the value for a particular flag. Accepts shell globs.
418get-flag() { 521get-flag() {
419 local f findflag="$1" 522 local f findflag="$1"
420 523
421 # this code looks a little flaky but seems to work for 524 # this code looks a little flaky but seems to work for
422 # everything we want ... 525 # everything we want ...
423 # for example, if CFLAGS="-march=i686": 526 # for example, if CFLAGS="-march=i686":
424 # `get-flag -march` == "-march=i686" 527 # `get-flag -march` == "-march=i686"
425 # `get-flag march` == "i686" 528 # `get-flag march` == "i686"
426 for f in ${CFLAGS} ${CXXFLAGS} ; do 529 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
427 if [ "${f/${findflag}}" != "${f}" ] ; then 530 if [ "${f/${findflag}}" != "${f}" ] ; then
428 printf "%s\n" "${f/-${findflag}=}" 531 printf "%s\n" "${f/-${findflag}=}"
429 return 0 532 return 0
430 fi 533 fi
431 done 534 done
432 return 1 535 return 1
433} 536}
434 537
435# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 538# DEAD FUNCS. Remove by Dec 2011.
436has_hardened() { 539test_flag() { die "$0: deprecated, please use test-flags()!" ; }
437 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 540has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
438
439 test_version_info Hardened && return 0
440 # The specs file wont exist unless gcc has GCC_SPECS support
441 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
442}
443
444# DEPRECATED - use gcc-specs-pie from toolchain-funcs
445# indicate whether PIC is set
446has_pic() {
447 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 541has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
448
449 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
450 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
451 gcc-specs-pie
452}
453
454# DEPRECATED - use gcc-specs-pie from toolchain-funcs
455# indicate whether PIE is set
456has_pie() {
457 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 542has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
458
459 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
460 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
461 gcc-specs-pie
462}
463
464# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
465# indicate whether code for SSP is being generated for all functions
466has_ssp_all() {
467 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 543has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
468
469 # note; this matches only -fstack-protector-all
470 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
471 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
472 gcc-specs-ssp-all
473}
474
475# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
476# indicate whether code for SSP is being generated
477has_ssp() {
478 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 544has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
479 545
480 # note; this matches both -fstack-protector and -fstack-protector-all 546# @FUNCTION: has_m64
481 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 547# @DESCRIPTION:
482 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 548# This doesn't test if the flag is accepted, it tests if the flag actually
483 gcc-specs-ssp 549# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
484} 550# return code is 0, else the return code is 1.
485
486has_m64() { 551has_m64() {
487 # this doesnt test if the flag is accepted, it tests if the flag 552 # this doesnt test if the flag is accepted, it tests if the flag
488 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 553 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
489 # please dont replace this function with test_flag in some future 554 # please dont replace this function with test_flag in some future
490 # clean-up! 555 # clean-up!
497 rm -f "${temp}".c 562 rm -f "${temp}".c
498 [[ ${ret} != 1 ]] && return 0 563 [[ ${ret} != 1 ]] && return 0
499 return 1 564 return 1
500} 565}
501 566
567# @FUNCTION: has_m32
568# @DESCRIPTION:
569# This doesn't test if the flag is accepted, it tests if the flag actually
570# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
571# code is 0, else return code is 1.
502has_m32() { 572has_m32() {
503 # this doesnt test if the flag is accepted, it tests if the flag 573 # this doesnt test if the flag is accepted, it tests if the flag
504 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 574 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
505 # please dont replace this function with test_flag in some future 575 # please dont replace this function with test_flag in some future
506 # clean-up! 576 # clean-up!
515 rm -f "${temp}".c 585 rm -f "${temp}".c
516 [[ ${ret} != 1 ]] && return 0 586 [[ ${ret} != 1 ]] && return 0
517 return 1 587 return 1
518} 588}
519 589
590# @FUNCTION: replace-sparc64-flags
591# @DESCRIPTION:
592# Sets mcpu to v8 and uses the original value as mtune if none specified.
520replace-sparc64-flags() { 593replace-sparc64-flags() {
521 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 594 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
522 595
523 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 596 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
524 for x in ${SPARC64_CPUS}; do 597 for x in ${SPARC64_CPUS}; do
525 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 598 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
526 done 599 done
527 else 600 else
528 for x in ${SPARC64_CPUS}; do 601 for x in ${SPARC64_CPUS}; do
529 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 602 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
530 done 603 done
531 fi 604 fi
532 605
533 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 606 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
534 for x in ${SPARC64_CPUS}; do 607 for x in ${SPARC64_CPUS}; do
535 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 608 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
536 done 609 done
537 else 610 else
538 for x in ${SPARC64_CPUS}; do 611 for x in ${SPARC64_CPUS}; do
539 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 612 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
540 done 613 done
541 fi 614 fi
542 615
543 export CFLAGS CXXFLAGS 616 export CFLAGS CXXFLAGS
544} 617}
545 618
619# @FUNCTION: append-libs
620# @USAGE: <libs>
621# @DESCRIPTION:
622# Add extra <libs> to the current LIBS.
623append-libs() {
624 [[ $# -eq 0 ]] && return 0
625 local flag
626 for flag in "$@"; do
627 [[ ${flag} == -l* ]] && flag=${flag#-l}
628 export LIBS="${LIBS} -l${flag}"
629 done
630
631 return 0
632}
633
634# @FUNCTION: append-ldflags
635# @USAGE: <flags>
636# @DESCRIPTION:
637# Add extra <flags> to the current LDFLAGS.
546append-ldflags() { 638append-ldflags() {
547 [[ -z $* ]] && return 0 639 [[ $# -eq 0 ]] && return 0
640 local flag
641 for flag in "$@"; do
642 [[ ${flag} == -l* ]] && \
643 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
644 done
645
548 export LDFLAGS="${LDFLAGS} $*" 646 export LDFLAGS="${LDFLAGS} $*"
549 return 0 647 return 0
550} 648}
551 649
552# Remove flags from LDFLAGS - it's up to the ebuild to filter 650# @FUNCTION: filter-ldflags
553# CFLAGS and CXXFLAGS via filter-flags if they need to. 651# @USAGE: <flags>
652# @DESCRIPTION:
653# Remove particular <flags> from LDFLAGS. Accepts shell globs.
554filter-ldflags() { 654filter-ldflags() {
555 _filter-var LDFLAGS "$@" 655 _filter-var LDFLAGS "$@"
556 return 0 656 return 0
557} 657}
558 658
659# @FUNCTION: raw-ldflags
660# @USAGE: [flags]
661# @DESCRIPTION:
559# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 662# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
560# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 663# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
561# to gcc where it needs the '-Wl,'. 664# to gcc where it needs the '-Wl,'.
665#
666# If no flags are specified, then default to ${LDFLAGS}.
562raw-ldflags() { 667raw-ldflags() {
563 local x input="$@" 668 local x input="$@"
564 [[ -z ${input} ]] && input=${LDFLAGS} 669 [[ -z ${input} ]] && input=${LDFLAGS}
565 set -- 670 set --
566 for x in ${input} ; do 671 for x in ${input} ; do
568 set -- "$@" ${x//,/ } 673 set -- "$@" ${x//,/ }
569 done 674 done
570 echo "$@" 675 echo "$@"
571} 676}
572 677
573# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 678# @FUNCTION: no-as-needed
574# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 679# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
575# fixes. 680no-as-needed() {
681 case $($(tc-getLD) -v 2>&1 </dev/null) in
682 *GNU*) # GNU ld
683 echo "-Wl,--no-as-needed" ;;
684 esac
685}
686
687# Some tests for when we screw with things and want to make
688# sure we didn't break anything
689#TESTS() {
690# CFLAGS="-a -b -c=1"
691# CXXFLAGS="-x -y -z=2"
692# LDFLAGS="-l -m -n=3"
576# 693#
577# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 694# die() { exit 1; }
578gcc2-flags() { 695# (is-flag 1 2 3) && die
579 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then 696# (is-ldflag 1 2 3) && die
580 CFLAGS=${CFLAGS//-mtune=/-mcpu=} 697#
581 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=} 698# is-flagq -l && die
582 fi 699# is-ldflagq -a && die
583 700# is-flagq -a || die
584 replace-cpu-flags k6-{2,3} k6 701# is-flagq -x || die
585 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686 702# is-ldflagq -n=* || die
586 703# is-ldflagq -n && die
587 replace-cpu-flags pentium-mmx i586 704#
588 replace-cpu-flags pentium{2,3,4} i686 705# strip-unsupported-flags
589 706# [[ ${CFLAGS} == "-c=1" ]] || die
590 replace-cpu-flags ev6{7,8} ev6 707# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
591 708#
592 export CFLAGS CXXFLAGS 709# echo "All tests pass"
593} 710#}
594 711#TESTS
595# Gets the flags needed for "NOW" binding
596bindnow-flags() {
597 case $($(tc-getLD) -v 2>&1 </dev/null) in
598 *GNU* | *'with BFD'*) # GNU ld
599 echo "-Wl,-z,now" ;;
600 *Apple*) # Darwin ld
601 echo "-bind_at_load" ;;
602 *)
603 # Some linkers just recognize -V instead of -v
604 case $($(tc-getLD) -V 2>&1 </dev/null) in
605 *Solaris*) # Solaris accept almost the same GNU options
606 echo "-Wl,-z,now" ;;
607 esac
608 ;;
609 esac
610}

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