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1# Copyright 1999-2003 Gentoo Technologies, Inc. 1# Copyright 1999-2009 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.37 2004/02/21 07:19:29 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.148 2010/05/08 03:47:41 dirtyepic Exp $
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.
12
13inherit eutils toolchain-funcs multilib
14
15################ DEPRECATED functions ################
16# The following are still present to avoid breaking existing
17# code more than necessary; however they are deprecated. Please
18# use gcc-specs-* from toolchain-funcs.eclass instead, if you
19# need to know which hardened techs are active in the compiler.
20# See bug #100974
4# 21#
5# Author Bart Verwilst <verwilst@gentoo.org> 22# has_hardened
23# has_pie
24# has_pic
25# has_ssp_all
26# has_ssp
6 27
7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS"
9 28
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 <new.cpu> <old.cpus> ###
22# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu>
24#
25#### is-flag <flag> ####
26# Returns "true" if flag is set in C[XX]FLAGS
27# Matches only complete a flag
28#
29#### strip-flags ####
30# Strip C[XX]FLAGS of everything except known
31# good options.
32#
33#### strip-unsupported-flags ####
34# Strip C[XX]FLAGS of any flags not supported by
35# installed version of gcc
36#
37#### get-flag <flag> ####
38# Find and echo the value for a particular flag
39#
40#### replace-sparc64-flags ####
41# Sets mcpu to v8 and uses the original value
42# as mtune if none specified.
43#
44#### filter-mfpmath <math types> ####
45# Remove specified math types from the fpmath specification
46# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
47# will leave the user with -mfpmath=386
48#
49#### append-ldflags ####
50# Add extra flags to your current LDFLAGS
51#
52#### etexec-flags ####
53# hooked function for hardened-gcc that appends
54# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
55# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
56#
57#### fstack-flags ####
58# hooked function for hardened-gcc that appends
59# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
60# and a package is filtering -fstack-protector, -fstack-protector-all
61#
62
63# 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
64setup-allowed-flags() { 31setup-allowed-flags() {
65 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
66 case "${ARCH}" in 33 export ALLOWED_FLAGS="-pipe"
67 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
68 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
69 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
70 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 41 fi
71 esac 42 # allow a bunch of flags that negate features / control ABI
43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
47 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
48 -mno-popcnt -mno-abm \
49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
51 -mieee -mieee-with-inexact -mschedule \
52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
54 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
56 -msecure-plt -m*-toc -D* -U*"
72 57
58 # 4.5
59 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60
73 # C[XX]FLAGS that we are think is ok, but needs testing 61 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
74 # NOTE: currently -Os have issues with gcc3 and K6* arch's 62 # NOTE: currently -Os have issues with gcc3 and K6* arch's
75 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 63 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
76 return 0 64 return 0
77} 65}
78 66
67# inverted filters for hardened compiler. This is trying to unpick
68# the hardened compiler defaults.
69_filter-hardened() {
70 local f
71 for f in "$@" ; do
72 case "${f}" in
73 # Ideally we should only concern ourselves with PIE flags,
74 # not -fPIC or -fpic, but too many places filter -fPIC without
75 # thinking about -fPIE.
76 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
77 gcc-specs-pie || continue
78 is-flagq -nopie || append-flags -nopie;;
79 -fstack-protector)
80 gcc-specs-ssp || continue
81 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
82 -fstack-protector-all)
83 gcc-specs-ssp-to-all || continue
84 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
85 -fno-strict-overflow)
86 gcc-specs-nostrict || continue
87 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
88 esac
89 done
90}
91
92# Remove occurrences of strings from variable given in $1
93# Strings removed are matched as globs, so for example
94# '-O*' would remove -O1, -O2 etc.
95_filter-var() {
96 local f x VAR VAL
97 declare -a new
98
99 VAR=$1
100 shift
101 eval VAL=\${${VAR}}
102 for f in ${VAL}; do
103 for x in "$@"; do
104 # Note this should work with globs like -O*
105 [[ ${f} == ${x} ]] && continue 2
106 done
107 eval new\[\${\#new\[@]}]=\${f}
108 done
109 eval export ${VAR}=\${new\[*]}
110}
111
112# @FUNCTION: filter-flags
113# @USAGE: <flags>
114# @DESCRIPTION:
115# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
79filter-flags() { 116filter-flags() {
80 for x in "$@" ; do 117 _filter-hardened "$@"
81 case "${x}" in 118 _filter-var CFLAGS "$@"
82 -fPIC|-fpic|-fPIE|-fpie) etexec-flags;; 119 _filter-var CPPFLAGS "$@"
83 -fstack-protector|-fstack-protector-all) fstack-flags;; 120 _filter-var CXXFLAGS "$@"
84 *) ;; 121 _filter-var FFLAGS "$@"
85 esac 122 _filter-var FCFLAGS "$@"
86 done 123 return 0
124}
87 125
88 # we do this fancy spacing stuff so as to not filter 126# @FUNCTION: filter-lfs-flags
89 # out part of a flag ... we want flag atoms ! :D 127# @DESCRIPTION:
128# Remove flags that enable Large File Support.
129filter-lfs-flags() {
130 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
131 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
132}
133
134# @FUNCTION: append-cppflags
135# @USAGE: <flags>
136# @DESCRIPTION:
137# Add extra <flags> to the current CPPFLAGS.
138append-cppflags() {
139 [[ -z $* ]] && return 0
140 export CPPFLAGS="${CPPFLAGS} $*"
141 return 0
142}
143
144# @FUNCTION: append-cflags
145# @USAGE: <flags>
146# @DESCRIPTION:
147# Add extra <flags> to the current CFLAGS.
148append-cflags() {
149 [[ -z $* ]] && return 0
90 CFLAGS=" ${CFLAGS} " 150 export CFLAGS="${CFLAGS} $*"
151 return 0
152}
153
154# @FUNCTION: append-cxxflags
155# @USAGE: <flags>
156# @DESCRIPTION:
157# Add extra <flags> to the current CXXFLAGS.
158append-cxxflags() {
159 [[ -z $* ]] && return 0
91 CXXFLAGS=" ${CXXFLAGS} " 160 export CXXFLAGS="${CXXFLAGS} $*"
92 for x in "$@" ; do
93 CFLAGS="${CFLAGS// ${x} / }"
94 CXXFLAGS="${CXXFLAGS// ${x} / }"
95 done
96 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
97 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
98 return 0 161 return 0
99} 162}
100 163
164# @FUNCTION: append-fflags
165# @USAGE: <flags>
166# @DESCRIPTION:
167# Add extra <flags> to the current {F,FC}FLAGS.
168append-fflags() {
169 [[ -z $* ]] && return 0
170 export FFLAGS="${FFLAGS} $*"
171 export FCFLAGS="${FCFLAGS} $*"
172 return 0
173}
174
175# @FUNCTION: append-lfs-flags
176# @DESCRIPTION:
177# Add flags that enable Large File Support.
178append-lfs-flags() {
179 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
180 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
181}
182
183# @FUNCTION: append-flags
184# @USAGE: <flags>
185# @DESCRIPTION:
186# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
101append-flags() { 187append-flags() {
102 export CFLAGS="${CFLAGS} $@" 188 [[ -z $* ]] && return 0
103 export CXXFLAGS="${CXXFLAGS} $@" 189 append-cflags "$@"
104 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags 190 append-cxxflags "$@"
191 append-fflags "$@"
105 return 0 192 return 0
106} 193}
107 194
195# @FUNCTION: replace-flags
196# @USAGE: <old> <new>
197# @DESCRIPTION:
198# Replace the <old> flag with <new>. Accepts shell globs for <old>.
108replace-flags() { 199replace-flags() {
109 # we do this fancy spacing stuff so as to not filter 200 [[ $# != 2 ]] \
110 # out part of a flag ... we want flag atoms ! :D 201 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
111 CFLAGS=" ${CFLAGS} " 202 && die "replace-flags takes 2 arguments, not $#"
112 CXXFLAGS=" ${CXXFLAGS} "
113 CFLAGS="${CFLAGS// ${1} / ${2} }"
114 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
115 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
116 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
117 return 0
118}
119 203
204 local f fset
205 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
206
207 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
208 # Looping over the flags instead of using a global
209 # substitution ensures that we're working with flag atoms.
210 # Otherwise globs like -O* have the potential to wipe out the
211 # list of flags.
212 for f in ${!fset}; do
213 # Note this should work with globs like -O*
214 [[ ${f} == ${1} ]] && f=${2}
215 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
216 done
217 eval export ${fset}=\${new_${fset}\[*]}
218 done
219
220 return 0
221}
222
223# @FUNCTION: replace-cpu-flags
224# @USAGE: <old> <new>
225# @DESCRIPTION:
226# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
227# with flags that select the <new> cpu. Accepts shell globs for <old>.
120replace-cpu-flags() { 228replace-cpu-flags() {
121 local newcpu="$1" ; shift 229 local newcpu="$#" ; newcpu="${!newcpu}"
122 local oldcpu="" 230 while [ $# -gt 1 ] ; do
123 for oldcpu in "$@" ; do 231 # quote to make sure that no globbing is done (particularly on
232 # ${oldcpu}) prior to calling replace-flags
124 replace-flags -march=${oldcpu} -march=${newcpu} 233 replace-flags "-march=${1}" "-march=${newcpu}"
125 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 234 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
235 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
236 shift
126 done 237 done
238 return 0
239}
240
241_is_flagq() {
242 local x
243 for x in ${!1} ; do
244 [[ ${x} == $2 ]] && return 0
245 done
127 return 0 246 return 1
128} 247}
129 248
249# @FUNCTION: is-flagq
250# @USAGE: <flag>
251# @DESCRIPTION:
252# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
253is-flagq() {
254 [[ -n $2 ]] && die "Usage: is-flag <flag>"
255 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
256}
257
258# @FUNCTION: is-flag
259# @USAGE: <flag>
260# @DESCRIPTION:
261# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
130is-flag() { 262is-flag() {
131 for x in ${CFLAGS} ${CXXFLAGS} ; do 263 is-flagq "$@" && echo true
132 if [ "${x}" == "$1" ] ; then
133 echo true
134 return 0
135 fi
136 done
137 return 1
138} 264}
139 265
266# @FUNCTION: is-ldflagq
267# @USAGE: <flag>
268# @DESCRIPTION:
269# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
270is-ldflagq() {
271 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
272 _is_flagq LDFLAGS $1
273}
274
275# @FUNCTION: is-ldflag
276# @USAGE: <flag>
277# @DESCRIPTION:
278# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
279is-ldflag() {
280 is-ldflagq "$@" && echo true
281}
282
283# @FUNCTION: filter-mfpmath
284# @USAGE: <math types>
285# @DESCRIPTION:
286# Remove specified math types from the fpmath flag. For example, if the user
287# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
288# -mfpmath=386.
140filter-mfpmath() { 289filter-mfpmath() {
290 local orig_mfpmath new_math prune_math
291
141 # save the original -mfpmath flag 292 # save the original -mfpmath flag
142 local orig_mfpmath="`get-flag -mfpmath`" 293 orig_mfpmath=$(get-flag -mfpmath)
143 # get the value of the current -mfpmath flag 294 # get the value of the current -mfpmath flag
144 local new_math=" `get-flag mfpmath | tr , ' '` " 295 new_math=$(get-flag mfpmath)
296 new_math=" ${new_math//,/ } "
145 # figure out which math values are to be removed 297 # figure out which math values are to be removed
146 local prune_math="" 298 prune_math=""
147 for prune_math in "$@" ; do 299 for prune_math in "$@" ; do
148 new_math="${new_math/ ${prune_math} / }" 300 new_math=${new_math/ ${prune_math} / }
149 done 301 done
150 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 302 new_math=$(echo ${new_math})
303 new_math=${new_math// /,}
151 304
152 if [ -z "${new_math}" ] ; then 305 if [[ -z ${new_math} ]] ; then
153 # if we're removing all user specified math values are 306 # if we're removing all user specified math values are
154 # slated for removal, then we just filter the flag 307 # slated for removal, then we just filter the flag
155 filter-flags ${orig_mfpmath} 308 filter-flags ${orig_mfpmath}
156 else 309 else
157 # if we only want to filter some of the user specified 310 # if we only want to filter some of the user specified
159 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 312 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
160 fi 313 fi
161 return 0 314 return 0
162} 315}
163 316
317# @FUNCTION: strip-flags
318# @DESCRIPTION:
319# Strip C[XX]FLAGS of everything except known good/safe flags.
164strip-flags() { 320strip-flags() {
321 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
322
165 setup-allowed-flags 323 setup-allowed-flags
166 324
167 local NEW_CFLAGS="" 325 local NEW_CFLAGS=""
168 local NEW_CXXFLAGS="" 326 local NEW_CXXFLAGS=""
327 local NEW_FFLAGS=""
328 local NEW_FCFLAGS=""
169 329
170 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 330 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
171 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 331 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
172 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
173 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 332 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
174 fi 333 fi
175 334
176 set -f 335 set -f # disable pathname expansion
177 336
178 for x in ${CFLAGS} 337 for x in ${CFLAGS}; do
179 do
180 for y in ${ALLOWED_FLAGS} 338 for y in ${ALLOWED_FLAGS}; do
181 do
182 flag=${x%%=*} 339 flag=${x%%=*}
183 if [ "${flag%%${y}}" = "" ] 340 if [ "${flag%%${y}}" = "" ] ; then
184 then
185 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 341 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
186 break 342 break
187 fi 343 fi
188 done 344 done
189 done 345 done
190 346
191 for x in ${CXXFLAGS} 347 for x in ${CXXFLAGS}; do
192 do
193 for y in ${ALLOWED_FLAGS} 348 for y in ${ALLOWED_FLAGS}; do
194 do
195 flag=${x%%=*} 349 flag=${x%%=*}
196 if [ "${flag%%${y}}" = "" ] 350 if [ "${flag%%${y}}" = "" ] ; then
197 then
198 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 351 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
199 break 352 break
200 fi 353 fi
201 done 354 done
202 done 355 done
203 356
357 for x in ${FFLAGS}; do
358 for y in ${ALLOWED_FLAGS}; do
359 flag=${x%%=*}
360 if [ "${flag%%${y}}" = "" ] ; then
361 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
362 break
363 fi
364 done
365 done
366
367 for x in ${FCFLAGS}; do
368 for y in ${ALLOWED_FLAGS}; do
369 flag=${x%%=*}
370 if [ "${flag%%${y}}" = "" ] ; then
371 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
372 break
373 fi
374 done
375 done
376
204 # In case we filtered out all optimization flags fallback to -O2 377 # In case we filtered out all optimization flags fallback to -O2
205 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 378 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
206 NEW_CFLAGS="${NEW_CFLAGS} -O2" 379 NEW_CFLAGS="${NEW_CFLAGS} -O2"
207 fi 380 fi
208 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 381 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
209 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 382 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
210 fi 383 fi
384 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
385 NEW_FFLAGS="${NEW_FFLAGS} -O2"
386 fi
387 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
388 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
389 fi
211 390
212 set +f 391 set +f # re-enable pathname expansion
213
214 [ `use debug` ] \
215 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
216 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
217 392
218 export CFLAGS="${NEW_CFLAGS}" 393 export CFLAGS="${NEW_CFLAGS}"
219 export CXXFLAGS="${NEW_CXXFLAGS}" 394 export CXXFLAGS="${NEW_CXXFLAGS}"
395 export FFLAGS="${NEW_FFLAGS}"
396 export FCFLAGS="${NEW_FCFLAGS}"
397 return 0
398}
399
400test-flag-PROG() {
401 local comp=$1
402 local flags="$2"
403
404 [[ -z ${comp} || -z ${flags} ]] && \
220 return 0 405 return 1
221}
222 406
407 local PROG=$(tc-get${comp})
408 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
409 > /dev/null 2>&1
410}
411
412# @FUNCTION: test-flag-CC
413# @USAGE: <flag>
414# @DESCRIPTION:
415# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
416test-flag-CC() { test-flag-PROG "CC" "$1"; }
417
418# @FUNCTION: test-flag-CXX
419# @USAGE: <flag>
420# @DESCRIPTION:
421# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
422test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
423
424# @FUNCTION: test-flag-F77
425# @USAGE: <flag>
426# @DESCRIPTION:
427# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
428test-flag-F77() { test-flag-PROG "F77" "$1"; }
429
430# @FUNCTION: test-flag-FC
431# @USAGE: <flag>
432# @DESCRIPTION:
433# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
434test-flag-FC() { test-flag-PROG "FC" "$1"; }
435
436test-flags-PROG() {
437 local comp=$1
438 local flags
439 local x
440
441 shift
442
443 [[ -z ${comp} ]] && return 1
444
445 x=""
446 for x in "$@" ; do
447 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
448 done
449
450 echo "${flags}"
451
452 # Just bail if we dont have any flags
453 [[ -n ${flags} ]]
454}
455
456# @FUNCTION: test-flags-CC
457# @USAGE: <flags>
458# @DESCRIPTION:
459# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
460test-flags-CC() { test-flags-PROG "CC" "$@"; }
461
462# @FUNCTION: test-flags-CXX
463# @USAGE: <flags>
464# @DESCRIPTION:
465# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
466test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
467
468# @FUNCTION: test-flags-F77
469# @USAGE: <flags>
470# @DESCRIPTION:
471# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
472test-flags-F77() { test-flags-PROG "F77" "$@"; }
473
474# @FUNCTION: test-flags-FC
475# @USAGE: <flags>
476# @DESCRIPTION:
477# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
478test-flags-FC() { test-flags-PROG "FC" "$@"; }
479
480# @FUNCTION: test-flags
481# @USAGE: <flags>
482# @DESCRIPTION:
483# Short-hand that should hopefully work for both C and C++ compiler, but
484# its really only present due to the append-flags() abomination.
485test-flags() { test-flags-CC "$@"; }
486
487# @FUNCTION: test_flag
488# @DESCRIPTION:
489# DEPRICIATED, use test-flags()
223test_flag() { 490test_flag() {
224 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then 491 ewarn "test_flag: deprecated, please use test-flags()!" >&2
225 echo "$@" 492
493 test-flags-CC "$@"
494}
495
496# @FUNCTION: test_version_info
497# @USAGE: <version>
498# @DESCRIPTION:
499# Returns shell true if the current C compiler version matches <version>, else returns shell false.
500# Accepts shell globs.
501test_version_info() {
502 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
226 return 0 503 return 0
227 fi 504 else
228 return 1 505 return 1
506 fi
229} 507}
230 508
509# @FUNCTION: strip-unsupported-flags
510# @DESCRIPTION:
511# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
231strip-unsupported-flags() { 512strip-unsupported-flags() {
232 for x in ${CFLAGS} ; do 513 export CFLAGS=$(test-flags-CC ${CFLAGS})
233 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 514 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
234 done 515 export FFLAGS=$(test-flags-F77 ${FFLAGS})
235 for x in ${CXXFLAGS} ; do 516 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
236 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
237 done
238
239 export CFLAGS="${NEW_CFLAGS}"
240 export CXXFLAGS="${NEW_CXXFLAGS}"
241} 517}
242 518
519# @FUNCTION: get-flag
520# @USAGE: <flag>
521# @DESCRIPTION:
522# Find and echo the value for a particular flag. Accepts shell globs.
243get-flag() { 523get-flag() {
524 local f findflag="$1"
525
244 # this code looks a little flaky but seems to work for 526 # this code looks a little flaky but seems to work for
245 # everything we want ... 527 # everything we want ...
246 # for example, if CFLAGS="-march=i686": 528 # for example, if CFLAGS="-march=i686":
247 # `get-flags -march` == "-march=i686" 529 # `get-flag -march` == "-march=i686"
248 # `get-flags march` == "i686" 530 # `get-flag march` == "i686"
249 local findflag="$1"
250 for f in ${CFLAGS} ${CXXFLAGS} ; do 531 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
251 if [ "${f/${findflag}}" != "${f}" ] ; then 532 if [ "${f/${findflag}}" != "${f}" ] ; then
252 echo "${f/-${findflag}=}" 533 printf "%s\n" "${f/-${findflag}=}"
253 return 0 534 return 0
254 fi 535 fi
255 done 536 done
256 return 1 537 return 1
257} 538}
258 539
540# @FUNCTION: has_hardened
541# @DESCRIPTION:
542# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
543has_hardened() {
544 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
545
546 test_version_info Hardened && return 0
547 # The specs file wont exist unless gcc has GCC_SPECS support
548 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
549}
550
551# @FUNCTION: has_pic
552# @DESCRIPTION:
553# DEPRECATED - use gcc-specs-pie from toolchain-funcs
554# indicate whether PIC is set
555has_pic() {
556 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
557
558 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
559 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
560 gcc-specs-pie
561}
562
563# @FUNCTION: has_pie
564# @DESCRIPTION:
565# DEPRECATED - use gcc-specs-pie from toolchain-funcs
566# indicate whether PIE is set
567has_pie() {
568 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
569
570 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
571 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
572 gcc-specs-pie
573}
574
575# @FUNCTION: has_ssp_all
576# @DESCRIPTION:
577# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
578# indicate whether code for SSP is being generated for all functions
579has_ssp_all() {
580 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
581
582 # note; this matches only -fstack-protector-all
583 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
584 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
585 gcc-specs-ssp-to-all
586}
587
588# @FUNCTION: has_ssp
589# @DESCRIPTION:
590# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
591# indicate whether code for SSP is being generated
592has_ssp() {
593 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
594
595 # note; this matches both -fstack-protector and -fstack-protector-all
596 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
597 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
598 gcc-specs-ssp
599}
600
601# @FUNCTION: has_m64
602# @DESCRIPTION:
603# This doesn't test if the flag is accepted, it tests if the flag actually
604# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
605# return code is 0, else the return code is 1.
606has_m64() {
607 # this doesnt test if the flag is accepted, it tests if the flag
608 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
609 # please dont replace this function with test_flag in some future
610 # clean-up!
611
612 local temp="$(emktemp)"
613 echo "int main() { return(0); }" > "${temp}".c
614 MY_CC=$(tc-getCC)
615 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
616 local ret=$?
617 rm -f "${temp}".c
618 [[ ${ret} != 1 ]] && return 0
619 return 1
620}
621
622# @FUNCTION: has_m32
623# @DESCRIPTION:
624# This doesn't test if the flag is accepted, it tests if the flag actually
625# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
626# code is 0, else return code is 1.
627has_m32() {
628 # this doesnt test if the flag is accepted, it tests if the flag
629 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
630 # please dont replace this function with test_flag in some future
631 # clean-up!
632
633 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
634
635 local temp=$(emktemp)
636 echo "int main() { return(0); }" > "${temp}".c
637 MY_CC=$(tc-getCC)
638 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
639 local ret=$?
640 rm -f "${temp}".c
641 [[ ${ret} != 1 ]] && return 0
642 return 1
643}
644
645# @FUNCTION: replace-sparc64-flags
646# @DESCRIPTION:
647# Sets mcpu to v8 and uses the original value as mtune if none specified.
259replace-sparc64-flags() { 648replace-sparc64-flags() {
260 local SPARC64_CPUS="ultrasparc v9" 649 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
261 650
262 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 651 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
263 then
264 for x in ${SPARC64_CPUS} 652 for x in ${SPARC64_CPUS}; do
265 do
266 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 653 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
267 done 654 done
268 else 655 else
269 for x in ${SPARC64_CPUS} 656 for x in ${SPARC64_CPUS}; do
270 do
271 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 657 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
272 done 658 done
273 fi 659 fi
274 660
275 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 661 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
276 then
277 for x in ${SPARC64_CPUS} 662 for x in ${SPARC64_CPUS}; do
278 do
279 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 663 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
280 done 664 done
281 else 665 else
282 for x in ${SPARC64_CPUS} 666 for x in ${SPARC64_CPUS}; do
283 do
284 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 667 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
285 done 668 done
286 fi 669 fi
287}
288 670
671 export CFLAGS CXXFLAGS
672}
673
674# @FUNCTION: append-libs
675# @USAGE: <libs>
676# @DESCRIPTION:
677# Add extra <libs> to the current LIBS.
678append-libs() {
679 [[ -z $* ]] && return 0
680 local flag
681 for flag in "$@"; do
682 [[ ${flag} == -l* ]] && flag=${flag#-l}
683 export LIBS="${LIBS} -l${flag}"
684 done
685
686 return 0
687}
688
689# @FUNCTION: append-ldflags
690# @USAGE: <flags>
691# @DESCRIPTION:
692# Add extra <flags> to the current LDFLAGS.
289append-ldflags() { 693append-ldflags() {
694 [[ -z $* ]] && return 0
695 local flag
696 for flag in "$@"; do
697 [[ ${flag} == -l* ]] && \
698 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
699 done
700
290 LDFLAGS="${LDFLAGS} $@" 701 export LDFLAGS="${LDFLAGS} $*"
291 return 0 702 return 0
292} 703}
293 704
294etexec-flags() { 705# @FUNCTION: filter-ldflags
295 has_version sys-devel/hardened-gcc 706# @USAGE: <flags>
296 if [ $? == 0 ] ; then 707# @DESCRIPTION:
297 if [ "`is-flag -yet_exec`" != "true" ]; then 708# Remove particular <flags> from LDFLAGS. Accepts shell globs.
298 debug-print ">>> appending flags -yet_exec" 709filter-ldflags() {
299 append-flags -yet_exec 710 _filter-var LDFLAGS "$@"
300 append-ldflags -yet_exec 711 return 0
301 fi
302 fi
303} 712}
304 713
305fstack-flags() { 714# @FUNCTION: raw-ldflags
306 has_version sys-devel/hardened-gcc 715# @USAGE: <flags>
307 if [ $? == 0 ] ; then 716# @DESCRIPTION:
308 if [ "`is-flag -yno_propolice`" != "true" ]; then 717# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
309 debug-print ">>> appending flags -yno_propolice" 718# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
310 append-flags -yno_propolice 719# to gcc where it needs the '-Wl,'.
311 append-ldflags -yno_propolice 720raw-ldflags() {
312 fi 721 local x input="$@"
313 fi 722 [[ -z ${input} ]] && input=${LDFLAGS}
723 set --
724 for x in ${input} ; do
725 x=${x#-Wl,}
726 set -- "$@" ${x//,/ }
727 done
728 echo "$@"
314} 729}
730
731# @FUNCTION: no-as-needed
732# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
733no-as-needed() {
734 case $($(tc-getLD) -v 2>&1 </dev/null) in
735 *GNU*) # GNU ld
736 echo "-Wl,--no-as-needed" ;;
737 esac
738}
739
740# Some tests for when we screw with things and want to make
741# sure we didn't break anything
742#TESTS() {
743# CFLAGS="-a -b -c=1"
744# CXXFLAGS="-x -y -z=2"
745# LDFLAGS="-l -m -n=3"
746#
747# die() { exit 1; }
748# (is-flag 1 2 3) && die
749# (is-ldflag 1 2 3) && die
750#
751# is-flagq -l && die
752# is-ldflagq -a && die
753# is-flagq -a || die
754# is-flagq -x || die
755# is-ldflagq -n=* || die
756# is-ldflagq -n && die
757#
758# strip-unsupported-flags
759# [[ ${CFLAGS} == "-c=1" ]] || die
760# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
761#
762# echo "All tests pass"
763#}
764#TESTS

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