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1# Copyright 1999-2005 Gentoo Foundation 1# Copyright 1999-2011 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.104 2006/01/14 10:52:12 kevquinn Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.162 2011/12/28 05:48:28 dirtyepic 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() 13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15
7inherit eutils toolchain-funcs multilib 16inherit eutils toolchain-funcs multilib
8 17
9#
10#### filter-flags <flags> ####
11# Remove particular flags from C[XX]FLAGS
12# Matches only complete flags
13#
14#### append-flags <flags> ####
15# Add extra flags to your current C[XX]FLAGS
16#
17#### replace-flags <orig.flag> <new.flag> ###
18# Replace a flag by another one
19#
20#### replace-cpu-flags <old.cpus> <new.cpu> ###
21# Replace march/mcpu flags that specify <old.cpus>
22# with flags that specify <new.cpu>
23#
24#### is-flag <flag> ####
25# Returns "true" if flag is set in C[XX]FLAGS
26# Matches only complete a flag
27#
28#### strip-flags ####
29# Strip C[XX]FLAGS of everything except known
30# good options.
31#
32#### strip-unsupported-flags ####
33# Strip C[XX]FLAGS of any flags not supported by
34# installed version of gcc
35#
36#### get-flag <flag> ####
37# Find and echo the value for a particular flag
38#
39#### replace-sparc64-flags ####
40# Sets mcpu to v8 and uses the original value
41# as mtune if none specified.
42#
43#### filter-mfpmath <math types> ####
44# Remove specified math types from the fpmath specification
45# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
46# will leave the user with -mfpmath=386
47#
48#### append-ldflags ####
49# Add extra flags to your current LDFLAGS
50#
51#### filter-ldflags <flags> ####
52# Remove particular flags from LDFLAGS
53# Matches only complete flags
54#
55#### fstack-flags ####
56# hooked function for hardened gcc that appends
57# -fno-stack-protector to {C,CXX,LD}FLAGS
58# when a package is filtering -fstack-protector, -fstack-protector-all
59# notice: modern automatic specs files will also suppress -fstack-protector-all
60# when only -fno-stack-protector is given
61#
62#### bindnow-flags ####
63# Returns the flags to enable "now" binding in the current selected linker.
64#
65################ DEPRECATED functions ################ 18################ DEPRECATED functions ################
66# The following are still present to avoid breaking existing 19# The following are still present to avoid breaking existing
67# code more than necessary; however they are deprecated. Please 20# code more than necessary; however they are deprecated. Please
68# use gcc-specs-* from toolchain-funcs.eclass instead, if you 21# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# need to know which hardened techs are active in the compiler. 22# need to know which hardened techs are active in the compiler.
70# See bug #100974 23# See bug #100974
71# 24#
72#### has_hardened #### 25# has_hardened
73# Returns true if the compiler has 'Hardened' in its version string, 26# has_pie
74# (note; switched-spec vanilla compilers satisfy this condition) or 27# has_pic
75# the specs file name contains 'hardened'.
76#
77#### has_pie ####
78# Returns true if the compiler by default or with current CFLAGS
79# builds position-independent code.
80#
81#### has_pic ####
82# Returns true if the compiler by default or with current CFLAGS
83# builds position-independent code.
84#
85#### has_ssp_all #### 28# has_ssp_all
86# Returns true if the compiler by default or with current CFLAGS 29# has_ssp
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 30
31
94# C[XX]FLAGS that we allow in strip-flags 32# {C,CXX,F,FC}FLAGS that we allow in strip-flags
33# Note: shell globs and character lists are allowed
95setup-allowed-flags() { 34setup-allowed-flags() {
96 if [[ -z ${ALLOWED_FLAGS} ]] ; then 35 if [[ -z ${ALLOWED_FLAGS} ]] ; then
97 export ALLOWED_FLAGS="-pipe" 36 export ALLOWED_FLAGS="-pipe"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O1 -O2 -Os -mcpu -march -mtune"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 41 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
42 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive"
43 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
103 fi 44 fi
104 # allow a bunch of flags that negate features / control ABI 45 # allow a bunch of flags that negate features / control ABI
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 46 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
47 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 48 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
107 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 49 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
50 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
51 -mno-popcnt -mno-abm \
108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 52 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 53 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \ 54 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 55 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 56 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 57 -m32 -m64 -mx32 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 58 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
59 -msecure-plt -m*-toc -D* -U*"
115 60
116 # C[XX]FLAGS that we are think is ok, but needs testing 61 # 4.5
117 # NOTE: currently -Os have issues with gcc3 and K6* arch's 62 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 63 # 4.6
119 return 0 64 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
120} 65 -mno-bmi -mno-tbm"
121 66
67 return 0
68}
69
70# inverted filters for hardened compiler. This is trying to unpick
71# the hardened compiler defaults.
72_filter-hardened() {
73 local f
74 for f in "$@" ; 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.
122filter-flags() { 119filter-flags() {
123 local x f fset 120 _filter-hardened "$@"
124 declare -a new_CFLAGS new_CXXFLAGS 121 _filter-var CFLAGS "$@"
125 122 _filter-var CPPFLAGS "$@"
126 for x in "$@" ; do 123 _filter-var CXXFLAGS "$@"
127 case "${x}" in 124 _filter-var FFLAGS "$@"
128 -fPIC|-fpic|-fPIE|-fpie|-pie) 125 _filter-var FCFLAGS "$@"
129 append-flags `test_flag -fno-pie`;;
130 -fstack-protector|-fstack-protector-all)
131 fstack-flags;;
132 esac
133 done
134
135 for fset in CFLAGS CXXFLAGS; do
136 # Looping over the flags instead of using a global
137 # substitution ensures that we're working with flag atoms.
138 # Otherwise globs like -O* have the potential to wipe out the
139 # list of flags.
140 for f in ${!fset}; do
141 for x in "$@"; do
142 # Note this should work with globs like -O*
143 [[ ${f} == ${x} ]] && continue 2
144 done
145 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
146 done
147 eval export ${fset}=\${new_${fset}\[*]}
148 done
149
150 return 0 126 return 0
151} 127}
152 128
129# @FUNCTION: filter-lfs-flags
130# @DESCRIPTION:
131# Remove flags that enable Large File Support.
153filter-lfs-flags() { 132filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 133 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
134 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
135 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
136 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
137 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
155 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
156} 139}
157 140
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.
158append-lfs-flags() { 185append-lfs-flags() {
159 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 186 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
187 # see comments in filter-lfs-flags func for meaning of these
160 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
161} 189}
162 190
191# @FUNCTION: append-flags
192# @USAGE: <flags>
193# @DESCRIPTION:
194# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
163append-flags() { 195append-flags() {
164 [[ -z $* ]] && return 0 196 [[ $# -eq 0 ]] && return 0
165 export CFLAGS="${CFLAGS} $*" 197 append-cflags "$@"
166 export CXXFLAGS="${CXXFLAGS} $*" 198 append-cxxflags "$@"
167 [ -n "`is-flag -fno-stack-protector`" -o \ 199 append-fflags "$@"
168 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
169 return 0 200 return 0
170} 201}
171 202
203# @FUNCTION: replace-flags
204# @USAGE: <old> <new>
205# @DESCRIPTION:
206# Replace the <old> flag with <new>. Accepts shell globs for <old>.
172replace-flags() { 207replace-flags() {
173 [[ $# != 2 ]] \ 208 [[ $# != 2 ]] \
174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 209 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
175 && die "replace-flags takes 2 arguments, not $#" 210 && die "replace-flags takes 2 arguments, not $#"
176 211
177 local f fset 212 local f fset
178 declare -a new_CFLAGS new_CXXFLAGS 213 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
179 214
180 for fset in CFLAGS CXXFLAGS; do 215 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
181 # Looping over the flags instead of using a global 216 # Looping over the flags instead of using a global
182 # substitution ensures that we're working with flag atoms. 217 # substitution ensures that we're working with flag atoms.
183 # Otherwise globs like -O* have the potential to wipe out the 218 # Otherwise globs like -O* have the potential to wipe out the
184 # list of flags. 219 # list of flags.
185 for f in ${!fset}; do 220 for f in ${!fset}; do
191 done 226 done
192 227
193 return 0 228 return 0
194} 229}
195 230
231# @FUNCTION: replace-cpu-flags
232# @USAGE: <old> <new>
233# @DESCRIPTION:
234# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
235# with flags that select the <new> cpu. Accepts shell globs for <old>.
196replace-cpu-flags() { 236replace-cpu-flags() {
197 local newcpu="$#" ; newcpu="${!newcpu}" 237 local newcpu="$#" ; newcpu="${!newcpu}"
198 while [ $# -gt 1 ] ; do 238 while [ $# -gt 1 ] ; do
199 # quote to make sure that no globbing is done (particularly on 239 # quote to make sure that no globbing is done (particularly on
200 # ${oldcpu} prior to calling replace-flags 240 # ${oldcpu}) prior to calling replace-flags
201 replace-flags "-march=${1}" "-march=${newcpu}" 241 replace-flags "-march=${1}" "-march=${newcpu}"
202 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 242 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
203 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 243 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
204 shift 244 shift
205 done 245 done
206 return 0 246 return 0
207} 247}
208 248
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 $1
264}
265
266# @FUNCTION: is-flag
267# @USAGE: <flag>
268# @DESCRIPTION:
269# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
209is-flag() { 270is-flag() {
210 local x 271 is-flagq "$@" && echo true
211
212 for x in ${CFLAGS} ${CXXFLAGS} ; do
213 # Note this should work with globs like -mcpu=ultrasparc*
214 if [[ ${x} == ${1} ]]; then
215 echo true
216 return 0
217 fi
218 done
219 return 1
220} 272}
221 273
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.
222filter-mfpmath() { 297filter-mfpmath() {
223 local orig_mfpmath new_math prune_math 298 local orig_mfpmath new_math prune_math
224 299
225 # save the original -mfpmath flag 300 # save the original -mfpmath flag
226 orig_mfpmath="`get-flag -mfpmath`" 301 orig_mfpmath=$(get-flag -mfpmath)
227 # get the value of the current -mfpmath flag 302 # get the value of the current -mfpmath flag
228 new_math=" `get-flag mfpmath | tr , ' '` " 303 new_math=$(get-flag mfpmath)
304 new_math=" ${new_math//,/ } "
229 # figure out which math values are to be removed 305 # figure out which math values are to be removed
230 prune_math="" 306 prune_math=""
231 for prune_math in "$@" ; do 307 for prune_math in "$@" ; do
232 new_math="${new_math/ ${prune_math} / }" 308 new_math=${new_math/ ${prune_math} / }
233 done 309 done
234 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 310 new_math=$(echo ${new_math})
311 new_math=${new_math// /,}
235 312
236 if [ -z "${new_math}" ] ; then 313 if [[ -z ${new_math} ]] ; then
237 # if we're removing all user specified math values are 314 # if we're removing all user specified math values are
238 # slated for removal, then we just filter the flag 315 # slated for removal, then we just filter the flag
239 filter-flags ${orig_mfpmath} 316 filter-flags ${orig_mfpmath}
240 else 317 else
241 # if we only want to filter some of the user specified 318 # if we only want to filter some of the user specified
243 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 320 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
244 fi 321 fi
245 return 0 322 return 0
246} 323}
247 324
325# @FUNCTION: strip-flags
326# @DESCRIPTION:
327# Strip C[XX]FLAGS of everything except known good/safe flags.
248strip-flags() { 328strip-flags() {
249 local x y flag NEW_CFLAGS NEW_CXXFLAGS 329 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
250 330
251 setup-allowed-flags 331 setup-allowed-flags
252 332
253 local NEW_CFLAGS="" 333 local NEW_CFLAGS=""
254 local NEW_CXXFLAGS="" 334 local NEW_CXXFLAGS=""
255 335 local NEW_FFLAGS=""
256 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 336 local NEW_FCFLAGS=""
257 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
258 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
259 fi
260 337
261 set -f # disable pathname expansion 338 set -f # disable pathname expansion
262 339
263 for x in ${CFLAGS}; do 340 for x in ${CFLAGS}; do
264 for y in ${ALLOWED_FLAGS}; do 341 for y in ${ALLOWED_FLAGS}; do
278 break 355 break
279 fi 356 fi
280 done 357 done
281 done 358 done
282 359
360 for x in ${FFLAGS}; do
361 for y in ${ALLOWED_FLAGS}; do
362 flag=${x%%=*}
363 if [ "${flag%%${y}}" = "" ] ; then
364 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
365 break
366 fi
367 done
368 done
369
370 for x in ${FCFLAGS}; do
371 for y in ${ALLOWED_FLAGS}; do
372 flag=${x%%=*}
373 if [ "${flag%%${y}}" = "" ] ; then
374 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
375 break
376 fi
377 done
378 done
379
283 # In case we filtered out all optimization flags fallback to -O2 380 # In case we filtered out all optimization flags fallback to -O2
284 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 381 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
285 NEW_CFLAGS="${NEW_CFLAGS} -O2" 382 NEW_CFLAGS="${NEW_CFLAGS} -O2"
286 fi 383 fi
287 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 384 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
288 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 385 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
289 fi 386 fi
387 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
388 NEW_FFLAGS="${NEW_FFLAGS} -O2"
389 fi
390 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
391 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
392 fi
290 393
291 set +f # re-enable pathname expansion 394 set +f # re-enable pathname expansion
292 395
293 export CFLAGS="${NEW_CFLAGS}" 396 export CFLAGS="${NEW_CFLAGS}"
294 export CXXFLAGS="${NEW_CXXFLAGS}" 397 export CXXFLAGS="${NEW_CXXFLAGS}"
398 export FFLAGS="${NEW_FFLAGS}"
399 export FCFLAGS="${NEW_FCFLAGS}"
295 return 0 400 return 0
296} 401}
297 402
298test-flag-PROG() { 403test-flag-PROG() {
299 local comp=$1 404 local comp=$1
300 local flags="$2" 405 local flags="$2"
301 406
302 [[ -z ${comp} || -z ${flags} ]] && \ 407 [[ -z ${comp} || -z ${flags} ]] && return 1
303 return 1
304 408
409 # use -c so we can test the assembler as well
305 local PROG=$(tc-get${comp}) 410 local PROG=$(tc-get${comp})
306 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 411 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
307 > /dev/null 2>&1 412 > /dev/null 2>&1
308} 413}
309 414
310# Returns true if C compiler support given flag 415# @FUNCTION: test-flag-CC
416# @USAGE: <flag>
417# @DESCRIPTION:
418# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
311test-flag-CC() { test-flag-PROG "CC" "$1"; } 419test-flag-CC() { test-flag-PROG "CC" "$1"; }
312 420
313# Returns true if C++ compiler support given flag 421# @FUNCTION: test-flag-CXX
422# @USAGE: <flag>
423# @DESCRIPTION:
424# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
314test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 425test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
426
427# @FUNCTION: test-flag-F77
428# @USAGE: <flag>
429# @DESCRIPTION:
430# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
431test-flag-F77() { test-flag-PROG "F77" "$1"; }
432
433# @FUNCTION: test-flag-FC
434# @USAGE: <flag>
435# @DESCRIPTION:
436# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
437test-flag-FC() { test-flag-PROG "FC" "$1"; }
315 438
316test-flags-PROG() { 439test-flags-PROG() {
317 local comp=$1 440 local comp=$1
318 local flags 441 local flags
319 local x 442 local x
320 443
321 shift 444 shift
322 445
323 [[ -z ${comp} ]] && \ 446 [[ -z ${comp} ]] && return 1
324 return 1
325 447
326 for x in "$@" ; do 448 for x in "$@" ; do
327 test-flag-${comp} "${x}" && flags="${flags} ${x}" 449 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
328 done 450 done
329 451
330 echo "${flags}" 452 echo "${flags}"
331 453
332 # Just bail if we dont have any flags 454 # Just bail if we dont have any flags
333 [[ -n ${flags} ]] 455 [[ -n ${flags} ]]
334} 456}
335 457
336# Returns (echo's) the given flags supported by the C compiler 458# @FUNCTION: test-flags-CC
459# @USAGE: <flags>
460# @DESCRIPTION:
461# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
337test-flags-CC() { test-flags-PROG "CC" "$@"; } 462test-flags-CC() { test-flags-PROG "CC" "$@"; }
338 463
339# Returns (echo's) the given flags supported by the C++ compiler 464# @FUNCTION: test-flags-CXX
465# @USAGE: <flags>
466# @DESCRIPTION:
467# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
340test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 468test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
341 469
470# @FUNCTION: test-flags-F77
471# @USAGE: <flags>
472# @DESCRIPTION:
473# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
474test-flags-F77() { test-flags-PROG "F77" "$@"; }
475
476# @FUNCTION: test-flags-FC
477# @USAGE: <flags>
478# @DESCRIPTION:
479# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
480test-flags-FC() { test-flags-PROG "FC" "$@"; }
481
482# @FUNCTION: test-flags
483# @USAGE: <flags>
484# @DESCRIPTION:
342# Short-hand that should hopefully work for both C and C++ compiler, but 485# Short-hand that should hopefully work for both C and C++ compiler, but
343# its really only present due to the append-flags() abomination. 486# its really only present due to the append-flags() abomination.
344test-flags() { test-flags-CC "$@"; } 487test-flags() { test-flags-CC "$@"; }
345 488
346# Deprecated, use test-flags() 489# @FUNCTION: test_version_info
347test_flag() { 490# @USAGE: <version>
348 ewarn "test_flag: deprecated, please use test-flags()!" >&2 491# @DESCRIPTION:
349 492# Returns shell true if the current C compiler version matches <version>, else returns shell false.
350 test-flags-CC "$@" 493# Accepts shell globs.
351}
352
353test_version_info() { 494test_version_info() {
354 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 495 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
355 return 0 496 return 0
356 else 497 else
357 return 1 498 return 1
358 fi 499 fi
359} 500}
360 501
502# @FUNCTION: strip-unsupported-flags
503# @DESCRIPTION:
504# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
361strip-unsupported-flags() { 505strip-unsupported-flags() {
362 local x NEW_CFLAGS NEW_CXXFLAGS 506 export CFLAGS=$(test-flags-CC ${CFLAGS})
363 507 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
364 for x in ${CFLAGS} ; do 508 export FFLAGS=$(test-flags-F77 ${FFLAGS})
365 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})" 509 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
366 done
367 for x in ${CXXFLAGS} ; do
368 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
369 done
370
371 export CFLAGS=${NEW_CFLAGS}
372 export CXXFLAGS=${NEW_CXXFLAGS}
373} 510}
374 511
512# @FUNCTION: get-flag
513# @USAGE: <flag>
514# @DESCRIPTION:
515# Find and echo the value for a particular flag. Accepts shell globs.
375get-flag() { 516get-flag() {
376 local f findflag="$1" 517 local f findflag="$1"
377 518
378 # this code looks a little flaky but seems to work for 519 # this code looks a little flaky but seems to work for
379 # everything we want ... 520 # everything we want ...
380 # for example, if CFLAGS="-march=i686": 521 # for example, if CFLAGS="-march=i686":
381 # `get-flag -march` == "-march=i686" 522 # `get-flag -march` == "-march=i686"
382 # `get-flag march` == "i686" 523 # `get-flag march` == "i686"
383 for f in ${CFLAGS} ${CXXFLAGS} ; do 524 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
384 if [ "${f/${findflag}}" != "${f}" ] ; then 525 if [ "${f/${findflag}}" != "${f}" ] ; then
385 printf "%s\n" "${f/-${findflag}=}" 526 printf "%s\n" "${f/-${findflag}=}"
386 return 0 527 return 0
387 fi 528 fi
388 done 529 done
389 return 1 530 return 1
390} 531}
391 532
392# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 533# DEAD FUNCS. Remove by Dec 2011.
393has_hardened() { 534test_flag() { die "$0: deprecated, please use test-flags()!" ; }
394 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 535has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
395
396 test_version_info Hardened && return 0
397 # The specs file wont exist unless gcc has GCC_SPECS support
398 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
399}
400
401# DEPRECATED - use gcc-specs-pie from toolchain-funcs
402# indicate whether PIC is set
403has_pic() {
404 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 536has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
405
406 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
407 ${CFLAGS/-fpic} != ${CFLAGS} || \
408 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
409}
410
411# DEPRECATED - use gcc-specs-pie from toolchain-funcs
412# indicate whether PIE is set
413has_pie() {
414 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 537has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
415
416 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
417 ${CFLAGS/-fpie} != ${CFLAGS} || \
418 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__) || \
419 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
420 # test PIC while waiting for specs to be updated to generate __PIE__
421}
422
423# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
424# indicate whether code for SSP is being generated for all functions
425has_ssp_all() {
426 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 538has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
427
428 # note; this matches only -fstack-protector-all
429 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
430 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
431 gcc-specs-ssp
432}
433
434# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
435# indicate whether code for SSP is being generated
436has_ssp() {
437 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 539has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
438 540
439 # note; this matches both -fstack-protector and -fstack-protector-all 541# @FUNCTION: has_m64
440 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 542# @DESCRIPTION:
441 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 543# This doesn't test if the flag is accepted, it tests if the flag actually
442 gcc-specs-ssp 544# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
443} 545# return code is 0, else the return code is 1.
444
445has_m64() { 546has_m64() {
446 # this doesnt test if the flag is accepted, it tests if the flag 547 # this doesnt test if the flag is accepted, it tests if the flag
447 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 548 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
448 # please dont replace this function with test_flag in some future 549 # please dont replace this function with test_flag in some future
449 # clean-up! 550 # clean-up!
456 rm -f "${temp}".c 557 rm -f "${temp}".c
457 [[ ${ret} != 1 ]] && return 0 558 [[ ${ret} != 1 ]] && return 0
458 return 1 559 return 1
459} 560}
460 561
562# @FUNCTION: has_m32
563# @DESCRIPTION:
564# This doesn't test if the flag is accepted, it tests if the flag actually
565# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
566# code is 0, else return code is 1.
461has_m32() { 567has_m32() {
462 # this doesnt test if the flag is accepted, it tests if the flag 568 # this doesnt test if the flag is accepted, it tests if the flag
463 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 569 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
464 # please dont replace this function with test_flag in some future 570 # please dont replace this function with test_flag in some future
465 # clean-up! 571 # clean-up!
474 rm -f "${temp}".c 580 rm -f "${temp}".c
475 [[ ${ret} != 1 ]] && return 0 581 [[ ${ret} != 1 ]] && return 0
476 return 1 582 return 1
477} 583}
478 584
585# @FUNCTION: replace-sparc64-flags
586# @DESCRIPTION:
587# Sets mcpu to v8 and uses the original value as mtune if none specified.
479replace-sparc64-flags() { 588replace-sparc64-flags() {
480 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 589 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
481 590
482 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 591 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
483 for x in ${SPARC64_CPUS}; do 592 for x in ${SPARC64_CPUS}; do
484 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 593 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
485 done 594 done
486 else 595 else
487 for x in ${SPARC64_CPUS}; do 596 for x in ${SPARC64_CPUS}; do
488 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 597 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
489 done 598 done
490 fi 599 fi
491 600
492 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 601 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
493 for x in ${SPARC64_CPUS}; do 602 for x in ${SPARC64_CPUS}; do
494 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 603 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
495 done 604 done
496 else 605 else
497 for x in ${SPARC64_CPUS}; do 606 for x in ${SPARC64_CPUS}; do
498 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 607 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
499 done 608 done
500 fi 609 fi
501 610
502 export CFLAGS CXXFLAGS 611 export CFLAGS CXXFLAGS
503} 612}
504 613
614# @FUNCTION: append-libs
615# @USAGE: <libs>
616# @DESCRIPTION:
617# Add extra <libs> to the current LIBS.
618append-libs() {
619 [[ $# -eq 0 ]] && return 0
620 local flag
621 for flag in "$@"; do
622 [[ ${flag} == -l* ]] && flag=${flag#-l}
623 export LIBS="${LIBS} -l${flag}"
624 done
625
626 return 0
627}
628
629# @FUNCTION: append-ldflags
630# @USAGE: <flags>
631# @DESCRIPTION:
632# Add extra <flags> to the current LDFLAGS.
505append-ldflags() { 633append-ldflags() {
634 [[ $# -eq 0 ]] && return 0
635 local flag
636 for flag in "$@"; do
637 [[ ${flag} == -l* ]] && \
638 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
639 done
640
506 export LDFLAGS="${LDFLAGS} $*" 641 export LDFLAGS="${LDFLAGS} $*"
507 return 0 642 return 0
508} 643}
509 644
645# @FUNCTION: filter-ldflags
646# @USAGE: <flags>
647# @DESCRIPTION:
648# Remove particular <flags> from LDFLAGS. Accepts shell globs.
510filter-ldflags() { 649filter-ldflags() {
511 local x 650 _filter-var LDFLAGS "$@"
512
513 # we do this fancy spacing stuff so as to not filter
514 # out part of a flag ... we want flag atoms ! :D
515 LDFLAGS=" ${LDFLAGS} "
516 for x in "$@" ; do
517 LDFLAGS=${LDFLAGS// ${x} / }
518 done
519 [[ -z ${LDFLAGS// } ]] \
520 && LDFLAGS="" \
521 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
522 export LDFLAGS
523 return 0 651 return 0
524} 652}
525 653
654# @FUNCTION: raw-ldflags
655# @USAGE: [flags]
656# @DESCRIPTION:
526# Turn C style ldflags (-Wl,-foo) into straight ldflags 657# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
658# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
659# to gcc where it needs the '-Wl,'.
660#
661# If no flags are specified, then default to ${LDFLAGS}.
527raw-ldflags() { 662raw-ldflags() {
528 local x input="$@" 663 local x input="$@"
529 [[ -z ${input} ]] && input=${LDFLAGS} 664 [[ -z ${input} ]] && input=${LDFLAGS}
530 set -- 665 set --
531 for x in ${input} ; do 666 for x in ${input} ; do
533 set -- "$@" ${x//,/ } 668 set -- "$@" ${x//,/ }
534 done 669 done
535 echo "$@" 670 echo "$@"
536} 671}
537 672
538fstack-flags() { 673# @FUNCTION: no-as-needed
539 if gcc-specs-ssp; then 674# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
540 [ -z "`is-flag -fno-stack-protector`" ] && 675no-as-needed() {
541 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
542 fi
543 return 0
544}
545
546# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
547# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
548# fixes.
549#
550# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
551gcc2-flags() {
552 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
553 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
554 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
555 fi
556
557 replace-cpu-flags k6-{2,3} k6
558 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
559
560 replace-cpu-flags pentium-mmx i586
561 replace-cpu-flags pentium{2,3,4} i686
562
563 replace-cpu-flags ev6{7,8} ev6
564
565 export CFLAGS CXXFLAGS
566}
567
568# Gets the flags needed for "NOW" binding
569bindnow-flags() {
570 case $($(tc-getLD) -v 2>&1 </dev/null) in 676 case $($(tc-getLD) -v 2>&1 </dev/null) in
571 *GNU* | *'with BFD'*) # GNU ld 677 *GNU*) # GNU ld
572 echo "-Wl,-z,now" ;; 678 echo "-Wl,--no-as-needed" ;;
573 *Apple*) # Darwin ld
574 echo "-bind_at_load" ;;
575 *)
576 # Some linkers just recognize -V instead of -v
577 case $($(tc-getLD) -V 2>&1 </dev/null) in
578 *Solaris*) # Solaris accept almost the same GNU options
579 echo "-Wl,-z,now" ;;
580 esac
581 ;;
582 esac 679 esac
583} 680}
681
682fi

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