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Revision 1.89 Revision 1.159
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 1.89 2005/07/06 20:23:20 agriffis 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
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
9# 21#
10#### filter-flags <flags> #### 22# has_hardened
11# Remove particular flags from C[XX]FLAGS 23# has_pie
12# Matches only complete flags 24# has_pic
13#
14#### append-flags <flags> ####
15# Add extra flags to your current C[XX]FLAGS
16#
17#### replace-flags <orig.flag> <new.flag> ###
18# Replace a flag by another one
19#
20#### replace-cpu-flags <old.cpus> <new.cpu> ###
21# Replace march/mcpu flags that specify <old.cpus>
22# with flags that specify <new.cpu>
23#
24#### is-flag <flag> ####
25# Returns "true" if flag is set in C[XX]FLAGS
26# Matches only complete a flag
27#
28#### strip-flags ####
29# Strip C[XX]FLAGS of everything except known
30# good options.
31#
32#### strip-unsupported-flags ####
33# Strip C[XX]FLAGS of any flags not supported by
34# installed version of gcc
35#
36#### get-flag <flag> ####
37# Find and echo the value for a particular flag
38#
39#### replace-sparc64-flags ####
40# Sets mcpu to v8 and uses the original value
41# as mtune if none specified.
42#
43#### filter-mfpmath <math types> ####
44# Remove specified math types from the fpmath specification
45# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
46# will leave the user with -mfpmath=386
47#
48#### append-ldflags ####
49# Add extra flags to your current LDFLAGS
50#
51#### filter-ldflags <flags> ####
52# Remove particular flags from LDFLAGS
53# Matches only complete flags
54#
55#### fstack-flags ####
56# hooked function for hardened gcc that appends
57# -fno-stack-protector to {C,CXX,LD}FLAGS
58# when a package is filtering -fstack-protector, -fstack-protector-all
59# notice: modern automatic specs files will also suppress -fstack-protector-all
60# when only -fno-stack-protector is given
61#
62#### has_pic ####
63# Returns true if the compiler by default or with current CFLAGS
64# builds position-independent code.
65#
66#### has_ssp_all #### 25# has_ssp_all
67# Returns true if the compiler by default or with current CFLAGS 26# has_ssp
68# generates stack smash protections for all functions
69#
70#### has_ssp ####
71# Returns true if the compiler by default or with current CFLAGS
72# generates stack smash protections for most vulnerable functions
73#
74 27
28
75# 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
76setup-allowed-flags() { 31setup-allowed-flags() {
77 if [[ -z ${ALLOWED_FLAGS} ]] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
78 export ALLOWED_FLAGS="-pipe" 33 export ALLOWED_FLAGS="-pipe"
79 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
82 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
83 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
84 fi 41 fi
85 # allow a bunch of flags that negate features / control ABI 42 # allow a bunch of flags that negate features / control ABI
86 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
87 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
88 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
47 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
48 -mno-popcnt -mno-abm \
89 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
90 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
51 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
91 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
92 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 54 -m32 -m64 -mx32 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
93 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
56 -msecure-plt -m*-toc -D* -U*"
94 57
58 # 4.5
59 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60 # 4.6
61 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
62 -mno-bmi -mno-tbm"
63
95 # C[XX]FLAGS that we are think is ok, but needs testing 64 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
96 # NOTE: currently -Os have issues with gcc3 and K6* arch's 65 # NOTE: currently -Os have issues with gcc3 and K6* arch's
97 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 66 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
98 return 0 67 return 0
99} 68}
100 69
70# inverted filters for hardened compiler. This is trying to unpick
71# the hardened compiler defaults.
72_filter-hardened() {
73 local f
74 for f in "$@" ; do
75 case "${f}" in
76 # Ideally we should only concern ourselves with PIE flags,
77 # not -fPIC or -fpic, but too many places filter -fPIC without
78 # thinking about -fPIE.
79 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
80 gcc-specs-pie || continue
81 is-flagq -nopie || append-flags -nopie;;
82 -fstack-protector)
83 gcc-specs-ssp || continue
84 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
85 -fstack-protector-all)
86 gcc-specs-ssp-to-all || continue
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);;
91 esac
92 done
93}
94
95# Remove occurrences of strings from variable given in $1
96# Strings removed are matched as globs, so for example
97# '-O*' would remove -O1, -O2 etc.
98_filter-var() {
99 local f x VAR VAL
100 declare -a new
101
102 VAR=$1
103 shift
104 eval VAL=\${${VAR}}
105 for f in ${VAL}; do
106 for x in "$@"; do
107 # Note this should work with globs like -O*
108 [[ ${f} == ${x} ]] && continue 2
109 done
110 eval new\[\${\#new\[@]}]=\${f}
111 done
112 eval export ${VAR}=\${new\[*]}
113}
114
115# @FUNCTION: filter-flags
116# @USAGE: <flags>
117# @DESCRIPTION:
118# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
101filter-flags() { 119filter-flags() {
102 local x f fset 120 _filter-hardened "$@"
103 declare -a new_CFLAGS new_CXXFLAGS 121 _filter-var CFLAGS "$@"
104 122 _filter-var CPPFLAGS "$@"
105 for x in "$@" ; do 123 _filter-var CXXFLAGS "$@"
106 case "${x}" in 124 _filter-var FFLAGS "$@"
107 -fPIC|-fpic|-fPIE|-fpie|-pie) 125 _filter-var FCFLAGS "$@"
108 append-flags `test_flag -fno-pie`;;
109 -fstack-protector|-fstack-protector-all)
110 fstack-flags;;
111 esac
112 done
113
114 for fset in CFLAGS CXXFLAGS; do
115 # Looping over the flags instead of using a global
116 # substitution ensures that we're working with flag atoms.
117 # Otherwise globs like -O* have the potential to wipe out the
118 # list of flags.
119 for f in ${!fset}; do
120 for x in "$@"; do
121 # Note this should work with globs like -O*
122 [[ ${f} == ${x} ]] && continue 2
123 done
124 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
125 done
126 eval export ${fset}=\${new_${fset}\[*]}
127 done
128
129 return 0 126 return 0
130} 127}
131 128
129# @FUNCTION: filter-lfs-flags
130# @DESCRIPTION:
131# Remove flags that enable Large File Support.
132filter-lfs-flags() { 132filter-lfs-flags() {
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)
133 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
134} 139}
135 140
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.
136append-lfs-flags() { 185append-lfs-flags() {
186 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
187 # see comments in filter-lfs-flags func for meaning of these
137 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
138} 189}
139 190
191# @FUNCTION: append-flags
192# @USAGE: <flags>
193# @DESCRIPTION:
194# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
140append-flags() { 195append-flags() {
141 [[ -z $* ]] && return 0 196 [[ $# -eq 0 ]] && return 0
142 export CFLAGS="${CFLAGS} $*" 197 append-cflags "$@"
143 export CXXFLAGS="${CXXFLAGS} $*" 198 append-cxxflags "$@"
144 [ -n "`is-flag -fno-stack-protector`" -o \ 199 append-fflags "$@"
145 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
146 return 0 200 return 0
147} 201}
148 202
203# @FUNCTION: replace-flags
204# @USAGE: <old> <new>
205# @DESCRIPTION:
206# Replace the <old> flag with <new>. Accepts shell globs for <old>.
149replace-flags() { 207replace-flags() {
208 [[ $# != 2 ]] \
209 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
210 && die "replace-flags takes 2 arguments, not $#"
211
150 local f fset 212 local f fset
151 declare -a new_CFLAGS new_CXXFLAGS 213 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
152 214
153 for fset in CFLAGS CXXFLAGS; do 215 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
154 # Looping over the flags instead of using a global 216 # Looping over the flags instead of using a global
155 # substitution ensures that we're working with flag atoms. 217 # substitution ensures that we're working with flag atoms.
156 # Otherwise globs like -O* have the potential to wipe out the 218 # Otherwise globs like -O* have the potential to wipe out the
157 # list of flags. 219 # list of flags.
158 for f in ${!fset}; do 220 for f in ${!fset}; do
164 done 226 done
165 227
166 return 0 228 return 0
167} 229}
168 230
231# @FUNCTION: replace-cpu-flags
232# @USAGE: <old> <new>
233# @DESCRIPTION:
234# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
235# with flags that select the <new> cpu. Accepts shell globs for <old>.
169replace-cpu-flags() { 236replace-cpu-flags() {
170 local newcpu="$#" ; newcpu="${!newcpu}" 237 local newcpu="$#" ; newcpu="${!newcpu}"
171 while [ $# -gt 1 ] ; do 238 while [ $# -gt 1 ] ; do
172 # quote to make sure that no globbing is done (particularly on 239 # quote to make sure that no globbing is done (particularly on
173 # ${oldcpu} prior to calling replace-flags 240 # ${oldcpu}) prior to calling replace-flags
174 replace-flags "-march=${1}" "-march=${newcpu}" 241 replace-flags "-march=${1}" "-march=${newcpu}"
175 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 242 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
176 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 243 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
177 shift 244 shift
178 done 245 done
179 return 0 246 return 0
180} 247}
181 248
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.
261is-flagq() {
262 [[ -n $2 ]] && die "Usage: is-flag <flag>"
263 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
264}
265
266# @FUNCTION: is-flag
267# @USAGE: <flag>
268# @DESCRIPTION:
269# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
182is-flag() { 270is-flag() {
183 local x 271 is-flagq "$@" && echo true
184
185 for x in ${CFLAGS} ${CXXFLAGS} ; do
186 # Note this should work with globs like -mcpu=ultrasparc*
187 if [[ ${x} == ${1} ]]; then
188 echo true
189 return 0
190 fi
191 done
192 return 1
193} 272}
194 273
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.
278is-ldflagq() {
279 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
280 _is_flagq LDFLAGS $1
281}
282
283# @FUNCTION: is-ldflag
284# @USAGE: <flag>
285# @DESCRIPTION:
286# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
287is-ldflag() {
288 is-ldflagq "$@" && echo true
289}
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.
195filter-mfpmath() { 297filter-mfpmath() {
196 local orig_mfpmath new_math prune_math 298 local orig_mfpmath new_math prune_math
197 299
198 # save the original -mfpmath flag 300 # save the original -mfpmath flag
199 orig_mfpmath="`get-flag -mfpmath`" 301 orig_mfpmath=$(get-flag -mfpmath)
200 # get the value of the current -mfpmath flag 302 # get the value of the current -mfpmath flag
201 new_math=" `get-flag mfpmath | tr , ' '` " 303 new_math=$(get-flag mfpmath)
304 new_math=" ${new_math//,/ } "
202 # figure out which math values are to be removed 305 # figure out which math values are to be removed
203 prune_math="" 306 prune_math=""
204 for prune_math in "$@" ; do 307 for prune_math in "$@" ; do
205 new_math="${new_math/ ${prune_math} / }" 308 new_math=${new_math/ ${prune_math} / }
206 done 309 done
207 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 310 new_math=$(echo ${new_math})
311 new_math=${new_math// /,}
208 312
209 if [ -z "${new_math}" ] ; then 313 if [[ -z ${new_math} ]] ; then
210 # if we're removing all user specified math values are 314 # if we're removing all user specified math values are
211 # slated for removal, then we just filter the flag 315 # slated for removal, then we just filter the flag
212 filter-flags ${orig_mfpmath} 316 filter-flags ${orig_mfpmath}
213 else 317 else
214 # if we only want to filter some of the user specified 318 # if we only want to filter some of the user specified
216 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 320 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
217 fi 321 fi
218 return 0 322 return 0
219} 323}
220 324
325# @FUNCTION: strip-flags
326# @DESCRIPTION:
327# Strip C[XX]FLAGS of everything except known good/safe flags.
221strip-flags() { 328strip-flags() {
222 local x y flag NEW_CFLAGS NEW_CXXFLAGS 329 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
223 330
224 setup-allowed-flags 331 setup-allowed-flags
225 332
226 local NEW_CFLAGS="" 333 local NEW_CFLAGS=""
227 local NEW_CXXFLAGS="" 334 local NEW_CXXFLAGS=""
335 local NEW_FFLAGS=""
336 local NEW_FCFLAGS=""
228 337
229 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 338 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
230 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 339 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
231 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 340 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
232 fi 341 fi
233 342
234 set -f # disable pathname expansion 343 set -f # disable pathname expansion
235 344
251 break 360 break
252 fi 361 fi
253 done 362 done
254 done 363 done
255 364
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} ${x}"
380 break
381 fi
382 done
383 done
384
256 # In case we filtered out all optimization flags fallback to -O2 385 # In case we filtered out all optimization flags fallback to -O2
257 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 386 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
258 NEW_CFLAGS="${NEW_CFLAGS} -O2" 387 NEW_CFLAGS="${NEW_CFLAGS} -O2"
259 fi 388 fi
260 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 389 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
261 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 390 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
262 fi 391 fi
392 if [ "${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="${NEW_FCFLAGS} -O2"
397 fi
263 398
264 set +f # re-enable pathname expansion 399 set +f # re-enable pathname expansion
265 400
266 export CFLAGS="${NEW_CFLAGS}" 401 export CFLAGS="${NEW_CFLAGS}"
267 export CXXFLAGS="${NEW_CXXFLAGS}" 402 export CXXFLAGS="${NEW_CXXFLAGS}"
268 return 0 403 export FFLAGS="${NEW_FFLAGS}"
269} 404 export FCFLAGS="${NEW_FCFLAGS}"
270
271test_flag() {
272 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
273 printf "%s\n" "$*"
274 return 0 405 return 0
275 fi
276 return 1
277} 406}
278 407
408test-flag-PROG() {
409 local comp=$1
410 local flags="$2"
411
412 [[ -z ${comp} || -z ${flags} ]] && return 1
413
414 # use -c so we can test the assembler as well
415 local PROG=$(tc-get${comp})
416 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
417 > /dev/null 2>&1
418}
419
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.
424test-flag-CC() { test-flag-PROG "CC" "$1"; }
425
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.
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"; }
443
444test-flags-PROG() {
445 local comp=$1
446 local flags
447 local x
448
449 shift
450
451 [[ -z ${comp} ]] && return 1
452
453 for x in "$@" ; do
454 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
455 done
456
457 echo "${flags}"
458
459 # Just bail if we dont have any flags
460 [[ -n ${flags} ]]
461}
462
463# @FUNCTION: test-flags-CC
464# @USAGE: <flags>
465# @DESCRIPTION:
466# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
467test-flags-CC() { test-flags-PROG "CC" "$@"; }
468
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.
473test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
474
475# @FUNCTION: test-flags-F77
476# @USAGE: <flags>
477# @DESCRIPTION:
478# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
479test-flags-F77() { test-flags-PROG "F77" "$@"; }
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" "$@"; }
486
487# @FUNCTION: test-flags
488# @USAGE: <flags>
489# @DESCRIPTION:
490# Short-hand that should hopefully work for both C and C++ compiler, but
491# its really only present due to the append-flags() abomination.
492test-flags() { test-flags-CC "$@"; }
493
494# @FUNCTION: test_version_info
495# @USAGE: <version>
496# @DESCRIPTION:
497# Returns shell true if the current C compiler version matches <version>, else returns shell false.
498# Accepts shell globs.
279test_version_info() { 499test_version_info() {
280 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 500 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
281 return 0 501 return 0
282 else 502 else
283 return 1 503 return 1
284 fi 504 fi
285} 505}
286 506
507# @FUNCTION: strip-unsupported-flags
508# @DESCRIPTION:
509# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
287strip-unsupported-flags() { 510strip-unsupported-flags() {
288 local NEW_CFLAGS NEW_CXXFLAGS 511 export CFLAGS=$(test-flags-CC ${CFLAGS})
289 512 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
290 for x in ${CFLAGS} ; do 513 export FFLAGS=$(test-flags-F77 ${FFLAGS})
291 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 514 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
292 done
293 for x in ${CXXFLAGS} ; do
294 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
295 done
296
297 export CFLAGS="${NEW_CFLAGS}"
298 export CXXFLAGS="${NEW_CXXFLAGS}"
299} 515}
300 516
517# @FUNCTION: get-flag
518# @USAGE: <flag>
519# @DESCRIPTION:
520# Find and echo the value for a particular flag. Accepts shell globs.
301get-flag() { 521get-flag() {
302 local f findflag="$1" 522 local f findflag="$1"
303 523
304 # this code looks a little flaky but seems to work for 524 # this code looks a little flaky but seems to work for
305 # everything we want ... 525 # everything we want ...
306 # for example, if CFLAGS="-march=i686": 526 # for example, if CFLAGS="-march=i686":
307 # `get-flag -march` == "-march=i686" 527 # `get-flag -march` == "-march=i686"
308 # `get-flag march` == "i686" 528 # `get-flag march` == "i686"
309 for f in ${CFLAGS} ${CXXFLAGS} ; do 529 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
310 if [ "${f/${findflag}}" != "${f}" ] ; then 530 if [ "${f/${findflag}}" != "${f}" ] ; then
311 printf "%s\n" "${f/-${findflag}=}" 531 printf "%s\n" "${f/-${findflag}=}"
312 return 0 532 return 0
313 fi 533 fi
314 done 534 done
315 return 1 535 return 1
316} 536}
317 537
318has_hardened() { 538# DEAD FUNCS. Remove by Dec 2011.
319 test_version_info Hardened && return 0 539test_flag() { die "$0: deprecated, please use test-flags()!" ; }
320 # the specs file wont exist unless gcc has GCC_SPECS support 540has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
321 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 541has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
322 return 0 542has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
323 return 1 543has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
324} 544has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
325 545
326# indicate whether PIC is set 546# @FUNCTION: has_m64
327has_pic() { 547# @DESCRIPTION:
328 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 548# This doesn't test if the flag is accepted, it tests if the flag actually
329 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 549# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
330 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0 550# return code is 0, else the return code is 1.
331 return 1
332}
333
334# indicate whether PIE is set
335has_pie() {
336 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
337 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
338 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
339 # test PIC while waiting for specs to be updated to generate __PIE__
340 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
341 return 1
342}
343
344# indicate whether code for SSP is being generated for all functions
345has_ssp_all() {
346 # note; this matches only -fstack-protector-all
347 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0
348 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0
349 return 1
350}
351
352# indicate whether code for SSP is being generated
353has_ssp() {
354 # note; this matches both -fstack-protector and -fstack-protector-all
355 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
356 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
357 return 1
358}
359
360has_m64() { 551has_m64() {
361 # this doesnt test if the flag is accepted, it tests if the flag 552 # this doesnt test if the flag is accepted, it tests if the flag
362 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 553 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
363 # please dont replace this function with test_flag in some future 554 # please dont replace this function with test_flag in some future
364 # clean-up! 555 # clean-up!
556
365 local temp="$(emktemp)" 557 local temp="$(emktemp)"
366 echo "int main() { return(0); }" > ${temp}.c 558 echo "int main() { return(0); }" > "${temp}".c
367 MY_CC=$(tc-getCC) 559 MY_CC=$(tc-getCC)
368 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 560 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
369 local ret=$? 561 local ret=$?
370 rm -f ${temp}.c 562 rm -f "${temp}".c
371 [ "$ret" != "1" ] && return 0 563 [[ ${ret} != 1 ]] && return 0
372 return 1 564 return 1
373} 565}
374 566
567# @FUNCTION: has_m32
568# @DESCRIPTION:
569# This doesn't test if the flag is accepted, it tests if the flag actually
570# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
571# code is 0, else return code is 1.
375has_m32() { 572has_m32() {
376 # this doesnt test if the flag is accepted, it tests if the flag 573 # this doesnt test if the flag is accepted, it tests if the flag
377 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 574 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
378 # please dont replace this function with test_flag in some future 575 # please dont replace this function with test_flag in some future
379 # clean-up! 576 # clean-up!
380 577
381 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0 578 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
382 579
383 local temp="$(emktemp)" 580 local temp=$(emktemp)
384 echo "int main() { return(0); }" > ${temp}.c 581 echo "int main() { return(0); }" > "${temp}".c
385 MY_CC=$(tc-getCC) 582 MY_CC=$(tc-getCC)
386 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 583 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
387 local ret=$? 584 local ret=$?
388 rm -f ${temp}.c 585 rm -f "${temp}".c
389 [ "$ret" != "1" ] && return 0 586 [[ ${ret} != 1 ]] && return 0
390 return 1 587 return 1
391} 588}
392 589
590# @FUNCTION: replace-sparc64-flags
591# @DESCRIPTION:
592# Sets mcpu to v8 and uses the original value as mtune if none specified.
393replace-sparc64-flags() { 593replace-sparc64-flags() {
394 local SPARC64_CPUS="ultrasparc v9" 594 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
395 595
396 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 596 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
397 for x in ${SPARC64_CPUS}; do 597 for x in ${SPARC64_CPUS}; do
398 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 598 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
399 done 599 done
400 else 600 else
401 for x in ${SPARC64_CPUS}; do 601 for x in ${SPARC64_CPUS}; do
402 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 602 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
403 done 603 done
404 fi 604 fi
405 605
406 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 606 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
407 for x in ${SPARC64_CPUS}; do 607 for x in ${SPARC64_CPUS}; do
408 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 608 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
409 done 609 done
410 else 610 else
411 for x in ${SPARC64_CPUS}; do 611 for x in ${SPARC64_CPUS}; do
412 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 612 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
413 done 613 done
414 fi 614 fi
415 615
416 export CFLAGS CXXFLAGS 616 export CFLAGS CXXFLAGS
417} 617}
418 618
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.
419append-ldflags() { 638append-ldflags() {
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
420 export LDFLAGS="${LDFLAGS} $*" 646 export LDFLAGS="${LDFLAGS} $*"
421 return 0 647 return 0
422} 648}
423 649
650# @FUNCTION: filter-ldflags
651# @USAGE: <flags>
652# @DESCRIPTION:
653# Remove particular <flags> from LDFLAGS. Accepts shell globs.
424filter-ldflags() { 654filter-ldflags() {
425 local x 655 _filter-var LDFLAGS "$@"
426
427 # we do this fancy spacing stuff so as to not filter
428 # out part of a flag ... we want flag atoms ! :D
429 LDFLAGS=" ${LDFLAGS} "
430 for x in "$@" ; do
431 LDFLAGS=${LDFLAGS// ${x} / }
432 done
433 [[ -z ${LDFLAGS// } ]] \
434 && LDFLAGS="" \
435 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
436 export LDFLAGS
437 return 0 656 return 0
438} 657}
439 658
440fstack-flags() { 659# @FUNCTION: raw-ldflags
441 if has_ssp; then 660# @USAGE: [flags]
442 [ -z "`is-flag -fno-stack-protector`" ] && 661# @DESCRIPTION:
443 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 662# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
444 fi 663# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
445 return 0 664# to gcc where it needs the '-Wl,'.
446}
447
448# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
449# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
450# fixes.
451# 665#
452# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 666# If no flags are specified, then default to ${LDFLAGS}.
453gcc2-flags() { 667raw-ldflags() {
454 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then 668 local x input="$@"
455 CFLAGS=${CFLAGS//-mtune=/-mcpu=} 669 [[ -z ${input} ]] && input=${LDFLAGS}
456 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=} 670 set --
457 fi 671 for x in ${input} ; do
458 672 x=${x#-Wl,}
459 replace-cpu-flags k6-{2,3} k6 673 set -- "$@" ${x//,/ }
460 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686 674 done
461 675 echo "$@"
462 replace-cpu-flags pentium-mmx i586
463 replace-cpu-flags pentium{2,3,4} i686
464
465 replace-cpu-flags ev6{7,8} ev6
466
467 export CFLAGS CXXFLAGS
468} 676}
677
678# @FUNCTION: no-as-needed
679# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
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"
693#
694# die() { exit 1; }
695# (is-flag 1 2 3) && die
696# (is-ldflag 1 2 3) && die
697#
698# is-flagq -l && die
699# is-ldflagq -a && die
700# is-flagq -a || die
701# is-flagq -x || die
702# is-ldflagq -n=* || die
703# is-ldflagq -n && die
704#
705# strip-unsupported-flags
706# [[ ${CFLAGS} == "-c=1" ]] || die
707# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
708#
709# echo "All tests pass"
710#}
711#TESTS

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