/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.108 Revision 1.165
1# Copyright 1999-2006 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 1.108 2006/06/15 14:45:59 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.165 2012/01/14 08:05:32 vapier Exp $
4#
5# Maintainer: base-system@gentoo.org
6 4
7# need access to emktemp() 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.
12
13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15
8inherit eutils toolchain-funcs multilib 16inherit eutils toolchain-funcs multilib
9 17
10#
11#### filter-flags <flags> ####
12# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags
14#
15#### append-flags <flags> ####
16# Add extra flags to your current C[XX]FLAGS
17#
18#### replace-flags <orig.flag> <new.flag> ###
19# Replace a flag by another one
20#
21#### replace-cpu-flags <old.cpus> <new.cpu> ###
22# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu>
24#
25#### is-flag[q] <flag> ####
26# Returns "true" if flag is set in C[XX]FLAGS
27# Matches only complete a flag
28# q version sets return code but doesn't echo
29#
30#### is-ldflag[q] <flag> ####
31# Returns "true" if flag is set in LDFLAGS
32# Matches only complete a flag
33# q version sets return code but doesn't echo
34#
35#### strip-flags ####
36# Strip C[XX]FLAGS of everything except known
37# good options.
38#
39#### strip-unsupported-flags ####
40# Strip C[XX]FLAGS of any flags not supported by
41# installed version of gcc
42#
43#### get-flag <flag> ####
44# Find and echo the value for a particular flag
45#
46#### replace-sparc64-flags ####
47# Sets mcpu to v8 and uses the original value
48# as mtune if none specified.
49#
50#### filter-mfpmath <math types> ####
51# Remove specified math types from the fpmath specification
52# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
53# will leave the user with -mfpmath=386
54#
55#### append-ldflags ####
56# Add extra flags to your current LDFLAGS
57#
58#### filter-ldflags <flags> ####
59# Remove particular flags from LDFLAGS
60# Matches only complete flags
61#
62#### bindnow-flags ####
63# Returns the flags to enable "now" binding in the current selected linker.
64#
65################ DEPRECATED functions ################
66# The following are still present to avoid breaking existing
67# code more than necessary; however they are deprecated. Please
68# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# need to know which hardened techs are active in the compiler.
70# See bug #100974
71#
72#### has_hardened ####
73# Returns true if the compiler has 'Hardened' in its version string,
74# (note; switched-spec vanilla compilers satisfy this condition) or
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 ####
86# Returns true if the compiler by default or with current CFLAGS
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
94# C[XX]FLAGS that we allow in strip-flags 18# {C,CXX,F,FC}FLAGS that we allow in strip-flags
19# Note: shell globs and character lists are allowed
95setup-allowed-flags() { 20setup-allowed-flags() {
96 if [[ -z ${ALLOWED_FLAGS} ]] ; then
97 export ALLOWED_FLAGS="-pipe" 21 ALLOWED_FLAGS="-pipe"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 22 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 23 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 24 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 25 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 26 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 27 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
104 fi 28 ALLOWED_FLAGS+=" -W* -w"
29
105 # allow a bunch of flags that negate features / control ABI 30 # allow a bunch of flags that negate features / control ABI
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 31 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
32 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
33 -fno-omit-frame-pointer"
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 34 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
108 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 35 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
36 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
109 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 37 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
110 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 38 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
111 -mieee -mieee-with-inexact \ 39 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
112 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 40 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
113 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 41 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
114 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 42 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
115 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 43 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
116 44
117 # C[XX]FLAGS that we are think is ok, but needs testing 45 # 4.5
118 # NOTE: currently -Os have issues with gcc3 and K6* arch's 46 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
119 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 47 # 4.6
48 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
49
50 export ALLOWED_FLAGS
120 return 0 51 return 0
121} 52}
122 53
123# inverted filters for hardened compiler. This is trying to unpick 54# inverted filters for hardened compiler. This is trying to unpick
124# the hardened compiler defaults. 55# the hardened compiler defaults.
132 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 63 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
133 gcc-specs-pie || continue 64 gcc-specs-pie || continue
134 is-flagq -nopie || append-flags -nopie;; 65 is-flagq -nopie || append-flags -nopie;;
135 -fstack-protector) 66 -fstack-protector)
136 gcc-specs-ssp || continue 67 gcc-specs-ssp || continue
137 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 68 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
138 -fstack-protector-all) 69 -fstack-protector-all)
139 gcc-specs-ssp-to-all || continue 70 gcc-specs-ssp-to-all || continue
140 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 71 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
72 -fno-strict-overflow)
73 gcc-specs-nostrict || continue
74 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
141 esac 75 esac
142 done 76 done
143} 77}
144 78
145# Remove occurrences of strings from variable given in $1 79# Remove occurrences of strings from variable given in $1
160 eval new\[\${\#new\[@]}]=\${f} 94 eval new\[\${\#new\[@]}]=\${f}
161 done 95 done
162 eval export ${VAR}=\${new\[*]} 96 eval export ${VAR}=\${new\[*]}
163} 97}
164 98
99# @FUNCTION: filter-flags
100# @USAGE: <flags>
101# @DESCRIPTION:
102# Remove particular <flags> from {C,CPP,CXX,F,FC,LD}FLAGS. Accepts shell globs.
165filter-flags() { 103filter-flags() {
166 _filter-hardened "$@" 104 _filter-hardened "$@"
105 local v
106 for v in C CPP CXX F FC LD ; do
167 _filter-var CFLAGS "$@" 107 _filter-var ${v}FLAGS "$@"
168 _filter-var CXXFLAGS "$@" 108 done
169 return 0 109 return 0
170} 110}
171 111
112# @FUNCTION: filter-lfs-flags
113# @DESCRIPTION:
114# Remove flags that enable Large File Support.
172filter-lfs-flags() { 115filter-lfs-flags() {
173 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 116 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
117 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
118 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
119 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
120 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
174 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
175} 122}
176 123
124# @FUNCTION: append-cppflags
125# @USAGE: <flags>
126# @DESCRIPTION:
127# Add extra <flags> to the current CPPFLAGS.
128append-cppflags() {
129 [[ $# -eq 0 ]] && return 0
130 export CPPFLAGS="${CPPFLAGS} $*"
131 return 0
132}
133
134# @FUNCTION: append-cflags
135# @USAGE: <flags>
136# @DESCRIPTION:
137# Add extra <flags> to the current CFLAGS.
138append-cflags() {
139 [[ $# -eq 0 ]] && return 0
140 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
141 return 0
142}
143
144# @FUNCTION: append-cxxflags
145# @USAGE: <flags>
146# @DESCRIPTION:
147# Add extra <flags> to the current CXXFLAGS.
148append-cxxflags() {
149 [[ $# -eq 0 ]] && return 0
150 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
151 return 0
152}
153
154# @FUNCTION: append-fflags
155# @USAGE: <flags>
156# @DESCRIPTION:
157# Add extra <flags> to the current {F,FC}FLAGS.
158append-fflags() {
159 [[ $# -eq 0 ]] && return 0
160 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
161 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
162 return 0
163}
164
165# @FUNCTION: append-lfs-flags
166# @DESCRIPTION:
167# Add flags that enable Large File Support.
177append-lfs-flags() { 168append-lfs-flags() {
178 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 169 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
170 # see comments in filter-lfs-flags func for meaning of these
179 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 171 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
180} 172}
181 173
174# @FUNCTION: append-flags
175# @USAGE: <flags>
176# @DESCRIPTION:
177# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
182append-flags() { 178append-flags() {
183 [[ -z $* ]] && return 0 179 [[ $# -eq 0 ]] && return 0
184 export CFLAGS="${CFLAGS} $*" 180 append-cflags "$@"
185 export CXXFLAGS="${CXXFLAGS} $*" 181 append-cxxflags "$@"
182 append-fflags "$@"
186 return 0 183 return 0
187} 184}
188 185
186# @FUNCTION: replace-flags
187# @USAGE: <old> <new>
188# @DESCRIPTION:
189# Replace the <old> flag with <new>. Accepts shell globs for <old>.
189replace-flags() { 190replace-flags() {
190 [[ $# != 2 ]] \ 191 [[ $# != 2 ]] \
191 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 192 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
192 && die "replace-flags takes 2 arguments, not $#" 193 && die "replace-flags takes 2 arguments, not $#"
193 194
194 local f fset 195 local f fset
195 declare -a new_CFLAGS new_CXXFLAGS 196 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
196 197
197 for fset in CFLAGS CXXFLAGS; do 198 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
198 # Looping over the flags instead of using a global 199 # Looping over the flags instead of using a global
199 # substitution ensures that we're working with flag atoms. 200 # substitution ensures that we're working with flag atoms.
200 # Otherwise globs like -O* have the potential to wipe out the 201 # Otherwise globs like -O* have the potential to wipe out the
201 # list of flags. 202 # list of flags.
202 for f in ${!fset}; do 203 for f in ${!fset}; do
208 done 209 done
209 210
210 return 0 211 return 0
211} 212}
212 213
214# @FUNCTION: replace-cpu-flags
215# @USAGE: <old> <new>
216# @DESCRIPTION:
217# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
218# with flags that select the <new> cpu. Accepts shell globs for <old>.
213replace-cpu-flags() { 219replace-cpu-flags() {
214 local newcpu="$#" ; newcpu="${!newcpu}" 220 local newcpu="$#" ; newcpu="${!newcpu}"
215 while [ $# -gt 1 ] ; do 221 while [ $# -gt 1 ] ; do
216 # quote to make sure that no globbing is done (particularly on 222 # quote to make sure that no globbing is done (particularly on
217 # ${oldcpu} prior to calling replace-flags 223 # ${oldcpu}) prior to calling replace-flags
218 replace-flags "-march=${1}" "-march=${newcpu}" 224 replace-flags "-march=${1}" "-march=${newcpu}"
219 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 225 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
220 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 226 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
221 shift 227 shift
222 done 228 done
223 return 0 229 return 0
224} 230}
225 231
232_is_flagq() {
233 local x
234 for x in ${!1} ; do
235 [[ ${x} == $2 ]] && return 0
236 done
237 return 1
238}
239
240# @FUNCTION: is-flagq
241# @USAGE: <flag>
242# @DESCRIPTION:
243# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
226is-flagq() { 244is-flagq() {
227 local x 245 [[ -n $2 ]] && die "Usage: is-flag <flag>"
228 246 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
229 for x in ${CFLAGS} ${CXXFLAGS} ; do
230 # Note this should work with globs like -mcpu=ultrasparc*
231 if [[ ${x} == ${1} ]]; then
232 return 0
233 fi
234 done
235 return 1
236} 247}
237 248
249# @FUNCTION: is-flag
250# @USAGE: <flag>
251# @DESCRIPTION:
252# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
238is-flag() { 253is-flag() {
239 if is-flagq ${1}; then 254 is-flagq "$@" && echo true
240 echo true
241 return 0
242 fi
243 return 1
244} 255}
245 256
257# @FUNCTION: is-ldflagq
258# @USAGE: <flag>
259# @DESCRIPTION:
260# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
246is-ldflagq() { 261is-ldflagq() {
247 local x 262 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
248 263 _is_flagq LDFLAGS $1
249 for x in ${LDFLAGS} ; do
250 # Note this should work with globs like -mcpu=ultrasparc*
251 if [[ ${x} == ${1} ]]; then
252 return 0
253 fi
254 done
255 return 1
256} 264}
257 265
266# @FUNCTION: is-ldflag
267# @USAGE: <flag>
268# @DESCRIPTION:
269# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
258is-ldflag() { 270is-ldflag() {
259 if is-ldflagq ${1}; then 271 is-ldflagq "$@" && echo true
260 echo true
261 return 0
262 fi
263 return 1
264} 272}
265 273
274# @FUNCTION: filter-mfpmath
275# @USAGE: <math types>
276# @DESCRIPTION:
277# Remove specified math types from the fpmath flag. For example, if the user
278# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
279# -mfpmath=386.
266filter-mfpmath() { 280filter-mfpmath() {
267 local orig_mfpmath new_math prune_math 281 local orig_mfpmath new_math prune_math
268 282
269 # save the original -mfpmath flag 283 # save the original -mfpmath flag
270 orig_mfpmath="`get-flag -mfpmath`" 284 orig_mfpmath=$(get-flag -mfpmath)
271 # get the value of the current -mfpmath flag 285 # get the value of the current -mfpmath flag
272 new_math=" `get-flag mfpmath | tr , ' '` " 286 new_math=$(get-flag mfpmath)
287 new_math=" ${new_math//,/ } "
273 # figure out which math values are to be removed 288 # figure out which math values are to be removed
274 prune_math="" 289 prune_math=""
275 for prune_math in "$@" ; do 290 for prune_math in "$@" ; do
276 new_math="${new_math/ ${prune_math} / }" 291 new_math=${new_math/ ${prune_math} / }
277 done 292 done
278 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 293 new_math=$(echo ${new_math})
294 new_math=${new_math// /,}
279 295
280 if [ -z "${new_math}" ] ; then 296 if [[ -z ${new_math} ]] ; then
281 # if we're removing all user specified math values are 297 # if we're removing all user specified math values are
282 # slated for removal, then we just filter the flag 298 # slated for removal, then we just filter the flag
283 filter-flags ${orig_mfpmath} 299 filter-flags ${orig_mfpmath}
284 else 300 else
285 # if we only want to filter some of the user specified 301 # if we only want to filter some of the user specified
287 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 303 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
288 fi 304 fi
289 return 0 305 return 0
290} 306}
291 307
308# @FUNCTION: strip-flags
309# @DESCRIPTION:
310# Strip C[XX]FLAGS of everything except known good/safe flags.
292strip-flags() { 311strip-flags() {
293 local x y flag NEW_CFLAGS NEW_CXXFLAGS 312 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
294 313
295 setup-allowed-flags 314 setup-allowed-flags
296 315
297 local NEW_CFLAGS="" 316 local NEW_CFLAGS=""
298 local NEW_CXXFLAGS="" 317 local NEW_CXXFLAGS=""
299 318 local NEW_FFLAGS=""
300 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 319 local NEW_FCFLAGS=""
301 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
302 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
303 fi
304 320
305 set -f # disable pathname expansion 321 set -f # disable pathname expansion
306 322
307 for x in ${CFLAGS}; do 323 for x in ${CFLAGS}; do
308 for y in ${ALLOWED_FLAGS}; do 324 for y in ${ALLOWED_FLAGS}; do
322 break 338 break
323 fi 339 fi
324 done 340 done
325 done 341 done
326 342
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} ${x}"
358 break
359 fi
360 done
361 done
362
327 # In case we filtered out all optimization flags fallback to -O2 363 # In case we filtered out all optimization flags fallback to -O2
328 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 364 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
329 NEW_CFLAGS="${NEW_CFLAGS} -O2" 365 NEW_CFLAGS="${NEW_CFLAGS} -O2"
330 fi 366 fi
331 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 367 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
332 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 368 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
333 fi 369 fi
370 if [ "${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="${NEW_FCFLAGS} -O2"
375 fi
334 376
335 set +f # re-enable pathname expansion 377 set +f # re-enable pathname expansion
336 378
337 export CFLAGS="${NEW_CFLAGS}" 379 export CFLAGS="${NEW_CFLAGS}"
338 export CXXFLAGS="${NEW_CXXFLAGS}" 380 export CXXFLAGS="${NEW_CXXFLAGS}"
381 export FFLAGS="${NEW_FFLAGS}"
382 export FCFLAGS="${NEW_FCFLAGS}"
339 return 0 383 return 0
340} 384}
341 385
342test-flag-PROG() { 386test-flag-PROG() {
343 local comp=$1 387 local comp=$1
344 local flags="$2" 388 local flags="$2"
345 389
346 [[ -z ${comp} || -z ${flags} ]] && \ 390 [[ -z ${comp} || -z ${flags} ]] && return 1
347 return 1
348 391
392 # use -c so we can test the assembler as well
349 local PROG=$(tc-get${comp}) 393 local PROG=$(tc-get${comp})
350 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 394 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
351 > /dev/null 2>&1 395 > /dev/null 2>&1
352} 396}
353 397
354# Returns true if C compiler support given flag 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.
355test-flag-CC() { test-flag-PROG "CC" "$1"; } 402test-flag-CC() { test-flag-PROG "CC" "$1"; }
356 403
357# Returns true if C++ compiler support given flag 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.
358test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 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"; }
359 421
360test-flags-PROG() { 422test-flags-PROG() {
361 local comp=$1 423 local comp=$1
362 local flags 424 local flags
363 local x 425 local x
364 426
365 shift 427 shift
366 428
367 [[ -z ${comp} ]] && \ 429 [[ -z ${comp} ]] && return 1
368 return 1
369 430
370 for x in "$@" ; do 431 for x in "$@" ; do
371 test-flag-${comp} "${x}" && flags="${flags} ${x}" 432 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
372 done 433 done
373 434
374 echo "${flags}" 435 echo "${flags}"
375 436
376 # Just bail if we dont have any flags 437 # Just bail if we dont have any flags
377 [[ -n ${flags} ]] 438 [[ -n ${flags} ]]
378} 439}
379 440
380# Returns (echo's) the given flags supported by the C compiler 441# @FUNCTION: test-flags-CC
442# @USAGE: <flags>
443# @DESCRIPTION:
444# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
381test-flags-CC() { test-flags-PROG "CC" "$@"; } 445test-flags-CC() { test-flags-PROG "CC" "$@"; }
382 446
383# Returns (echo's) the given flags supported by the C++ compiler 447# @FUNCTION: test-flags-CXX
448# @USAGE: <flags>
449# @DESCRIPTION:
450# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
384test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 451test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
385 452
453# @FUNCTION: test-flags-F77
454# @USAGE: <flags>
455# @DESCRIPTION:
456# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
457test-flags-F77() { test-flags-PROG "F77" "$@"; }
458
459# @FUNCTION: test-flags-FC
460# @USAGE: <flags>
461# @DESCRIPTION:
462# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
463test-flags-FC() { test-flags-PROG "FC" "$@"; }
464
465# @FUNCTION: test-flags
466# @USAGE: <flags>
467# @DESCRIPTION:
386# Short-hand that should hopefully work for both C and C++ compiler, but 468# Short-hand that should hopefully work for both C and C++ compiler, but
387# its really only present due to the append-flags() abomination. 469# its really only present due to the append-flags() abomination.
388test-flags() { test-flags-CC "$@"; } 470test-flags() { test-flags-CC "$@"; }
389 471
390# Depriciated, use test-flags() 472# @FUNCTION: test_version_info
391test_flag() { 473# @USAGE: <version>
392 ewarn "test_flag: deprecated, please use test-flags()!" >&2 474# @DESCRIPTION:
393 475# Returns shell true if the current C compiler version matches <version>, else returns shell false.
394 test-flags-CC "$@" 476# Accepts shell globs.
395}
396
397test_version_info() { 477test_version_info() {
398 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 478 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
399 return 0 479 return 0
400 else 480 else
401 return 1 481 return 1
402 fi 482 fi
403} 483}
404 484
485# @FUNCTION: strip-unsupported-flags
486# @DESCRIPTION:
487# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
405strip-unsupported-flags() { 488strip-unsupported-flags() {
406 local x NEW_CFLAGS NEW_CXXFLAGS 489 export CFLAGS=$(test-flags-CC ${CFLAGS})
407 490 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
408 for x in ${CFLAGS} ; do 491 export FFLAGS=$(test-flags-F77 ${FFLAGS})
409 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})" 492 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
410 done
411 for x in ${CXXFLAGS} ; do
412 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
413 done
414
415 export CFLAGS=${NEW_CFLAGS}
416 export CXXFLAGS=${NEW_CXXFLAGS}
417} 493}
418 494
495# @FUNCTION: get-flag
496# @USAGE: <flag>
497# @DESCRIPTION:
498# Find and echo the value for a particular flag. Accepts shell globs.
419get-flag() { 499get-flag() {
420 local f findflag="$1" 500 local f findflag="$1"
421 501
422 # this code looks a little flaky but seems to work for 502 # this code looks a little flaky but seems to work for
423 # everything we want ... 503 # everything we want ...
424 # for example, if CFLAGS="-march=i686": 504 # for example, if CFLAGS="-march=i686":
425 # `get-flag -march` == "-march=i686" 505 # `get-flag -march` == "-march=i686"
426 # `get-flag march` == "i686" 506 # `get-flag march` == "i686"
427 for f in ${CFLAGS} ${CXXFLAGS} ; do 507 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
428 if [ "${f/${findflag}}" != "${f}" ] ; then 508 if [ "${f/${findflag}}" != "${f}" ] ; then
429 printf "%s\n" "${f/-${findflag}=}" 509 printf "%s\n" "${f/-${findflag}=}"
430 return 0 510 return 0
431 fi 511 fi
432 done 512 done
433 return 1 513 return 1
434} 514}
435 515
436# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 516# @FUNCTION: has_m64
437has_hardened() { 517# @DESCRIPTION:
438 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 518# This doesn't test if the flag is accepted, it tests if the flag actually
439 519# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
440 test_version_info Hardened && return 0 520# return code is 0, else the return code is 1.
441 # The specs file wont exist unless gcc has GCC_SPECS support
442 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
443}
444
445# DEPRECATED - use gcc-specs-pie from toolchain-funcs
446# indicate whether PIC is set
447has_pic() {
448 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
449
450 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
451 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
452 gcc-specs-pie
453}
454
455# DEPRECATED - use gcc-specs-pie from toolchain-funcs
456# indicate whether PIE is set
457has_pie() {
458 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
459
460 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
461 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
462 gcc-specs-pie
463}
464
465# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
466# indicate whether code for SSP is being generated for all functions
467has_ssp_all() {
468 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
469
470 # note; this matches only -fstack-protector-all
471 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
472 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
473 gcc-specs-ssp-all
474}
475
476# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
477# indicate whether code for SSP is being generated
478has_ssp() {
479 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
480
481 # note; this matches both -fstack-protector and -fstack-protector-all
482 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
483 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
484 gcc-specs-ssp
485}
486
487has_m64() { 521has_m64() {
488 # this doesnt test if the flag is accepted, it tests if the flag 522 # this doesnt test if the flag is accepted, it tests if the flag
489 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 523 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
490 # please dont replace this function with test_flag in some future 524 # please dont replace this function with test_flag in some future
491 # clean-up! 525 # clean-up!
498 rm -f "${temp}".c 532 rm -f "${temp}".c
499 [[ ${ret} != 1 ]] && return 0 533 [[ ${ret} != 1 ]] && return 0
500 return 1 534 return 1
501} 535}
502 536
537# @FUNCTION: has_m32
538# @DESCRIPTION:
539# This doesn't test if the flag is accepted, it tests if the flag actually
540# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
541# code is 0, else return code is 1.
503has_m32() { 542has_m32() {
504 # this doesnt test if the flag is accepted, it tests if the flag 543 # this doesnt test if the flag is accepted, it tests if the flag
505 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 544 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
506 # please dont replace this function with test_flag in some future 545 # please dont replace this function with test_flag in some future
507 # clean-up! 546 # clean-up!
516 rm -f "${temp}".c 555 rm -f "${temp}".c
517 [[ ${ret} != 1 ]] && return 0 556 [[ ${ret} != 1 ]] && return 0
518 return 1 557 return 1
519} 558}
520 559
560# @FUNCTION: replace-sparc64-flags
561# @DESCRIPTION:
562# Sets mcpu to v8 and uses the original value as mtune if none specified.
521replace-sparc64-flags() { 563replace-sparc64-flags() {
522 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 564 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
523 565
524 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 566 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
525 for x in ${SPARC64_CPUS}; do 567 for x in ${SPARC64_CPUS}; do
526 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 568 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
527 done 569 done
528 else 570 else
529 for x in ${SPARC64_CPUS}; do 571 for x in ${SPARC64_CPUS}; do
530 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 572 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
531 done 573 done
532 fi 574 fi
533 575
534 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 576 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
535 for x in ${SPARC64_CPUS}; do 577 for x in ${SPARC64_CPUS}; do
536 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 578 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
537 done 579 done
538 else 580 else
539 for x in ${SPARC64_CPUS}; do 581 for x in ${SPARC64_CPUS}; do
540 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 582 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
541 done 583 done
542 fi 584 fi
543 585
544 export CFLAGS CXXFLAGS 586 export CFLAGS CXXFLAGS
545} 587}
546 588
589# @FUNCTION: append-libs
590# @USAGE: <libs>
591# @DESCRIPTION:
592# Add extra <libs> to the current LIBS.
593append-libs() {
594 [[ $# -eq 0 ]] && return 0
595 local flag
596 for flag in "$@"; do
597 [[ ${flag} == -l* ]] && flag=${flag#-l}
598 export LIBS="${LIBS} -l${flag}"
599 done
600
601 return 0
602}
603
604# @FUNCTION: append-ldflags
605# @USAGE: <flags>
606# @DESCRIPTION:
607# Add extra <flags> to the current LDFLAGS.
547append-ldflags() { 608append-ldflags() {
548 [[ -z $* ]] && return 0 609 [[ $# -eq 0 ]] && return 0
610 local flag
611 for flag in "$@"; do
612 [[ ${flag} == -l* ]] && \
613 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
614 done
615
549 export LDFLAGS="${LDFLAGS} $*" 616 export LDFLAGS="${LDFLAGS} $*"
550 return 0 617 return 0
551} 618}
552 619
553# Remove flags from LDFLAGS - it's up to the ebuild to filter 620# @FUNCTION: filter-ldflags
554# CFLAGS and CXXFLAGS via filter-flags if they need to. 621# @USAGE: <flags>
622# @DESCRIPTION:
623# Remove particular <flags> from LDFLAGS. Accepts shell globs.
555filter-ldflags() { 624filter-ldflags() {
556 _filter-var LDFLAGS "$@" 625 _filter-var LDFLAGS "$@"
557 return 0 626 return 0
558} 627}
559 628
629# @FUNCTION: raw-ldflags
630# @USAGE: [flags]
631# @DESCRIPTION:
560# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 632# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
561# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 633# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
562# to gcc where it needs the '-Wl,'. 634# to gcc where it needs the '-Wl,'.
635#
636# If no flags are specified, then default to ${LDFLAGS}.
563raw-ldflags() { 637raw-ldflags() {
564 local x input="$@" 638 local x input="$@"
565 [[ -z ${input} ]] && input=${LDFLAGS} 639 [[ -z ${input} ]] && input=${LDFLAGS}
566 set -- 640 set --
567 for x in ${input} ; do 641 for x in ${input} ; do
569 set -- "$@" ${x//,/ } 643 set -- "$@" ${x//,/ }
570 done 644 done
571 echo "$@" 645 echo "$@"
572} 646}
573 647
574# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 648# @FUNCTION: no-as-needed
575# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 649# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
576# fixes. 650no-as-needed() {
577#
578# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
579gcc2-flags() {
580 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
581 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
582 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
583 fi
584
585 replace-cpu-flags k6-{2,3} k6
586 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
587
588 replace-cpu-flags pentium-mmx i586
589 replace-cpu-flags pentium{2,3,4} i686
590
591 replace-cpu-flags ev6{7,8} ev6
592
593 export CFLAGS CXXFLAGS
594}
595
596# Gets the flags needed for "NOW" binding
597bindnow-flags() {
598 case $($(tc-getLD) -v 2>&1 </dev/null) in 651 case $($(tc-getLD) -v 2>&1 </dev/null) in
599 *GNU* | *'with BFD'*) # GNU ld 652 *GNU*) # GNU ld
600 echo "-Wl,-z,now" ;; 653 echo "-Wl,--no-as-needed" ;;
601 *Apple*) # Darwin ld
602 echo "-bind_at_load" ;;
603 *)
604 # Some linkers just recognize -V instead of -v
605 case $($(tc-getLD) -V 2>&1 </dev/null) in
606 *Solaris*) # Solaris accept almost the same GNU options
607 echo "-Wl,-z,now" ;;
608 esac
609 ;;
610 esac 654 esac
611} 655}
656
657fi

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