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Revision 1.101 Revision 1.165
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 1.101 2006/01/01 01:14:59 swegener Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.165 2012/01/14 08:05:32 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() 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 ################
66# The following are still present to avoid breaking existing
67# code more than necessary; however they are deprecated. Please
68# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# need to know which hardened techs are active in the compiler.
70# See bug #100974
71#
72#### has_hardened ####
73# Returns true if the compiler has 'Hardened' in its version string,
74# (note; switched-spec vanilla compilers satisfy this condition) or
75# the specs file name contains 'hardened'.
76#
77#### has_pie ####
78# Returns true if the compiler by default or with current CFLAGS
79# builds position-independent code.
80#
81#### has_pic ####
82# Returns true if the compiler by default or with current CFLAGS
83# builds position-independent code.
84#
85#### has_ssp_all ####
86# Returns true if the compiler by default or with current CFLAGS
87# generates stack smash protections for all functions
88#
89#### has_ssp ####
90# Returns true if the compiler by default or with current CFLAGS
91# generates stack smash protections for most vulnerable functions
92#
93
94# C[XX]FLAGS that we allow in strip-flags 18# {C,CXX,F,FC}FLAGS that we allow in strip-flags
19# Note: shell globs and character lists are allowed
95setup-allowed-flags() { 20setup-allowed-flags() {
96 if [[ -z ${ALLOWED_FLAGS} ]] ; then
97 export ALLOWED_FLAGS="-pipe" 21 ALLOWED_FLAGS="-pipe"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 22 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 23 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 24 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 25 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 26 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
103 fi 27 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
28 ALLOWED_FLAGS+=" -W* -w"
29
104 # allow a bunch of flags that negate features / control ABI 30 # allow a bunch of flags that negate features / control ABI
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 31 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
32 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
33 -fno-omit-frame-pointer"
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 34 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
107 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 35 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
36 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 37 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 38 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \ 39 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 40 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 41 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 42 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 43 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
115 44
116 # C[XX]FLAGS that we are think is ok, but needs testing 45 # 4.5
117 # NOTE: currently -Os have issues with gcc3 and K6* arch's 46 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 47 # 4.6
119 return 0 48 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
120}
121 49
50 export ALLOWED_FLAGS
51 return 0
52}
53
54# inverted filters for hardened compiler. This is trying to unpick
55# the hardened compiler defaults.
56_filter-hardened() {
57 local f
58 for f in "$@" ; do
59 case "${f}" in
60 # Ideally we should only concern ourselves with PIE flags,
61 # not -fPIC or -fpic, but too many places filter -fPIC without
62 # thinking about -fPIE.
63 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
64 gcc-specs-pie || continue
65 is-flagq -nopie || append-flags -nopie;;
66 -fstack-protector)
67 gcc-specs-ssp || continue
68 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
69 -fstack-protector-all)
70 gcc-specs-ssp-to-all || continue
71 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
72 -fno-strict-overflow)
73 gcc-specs-nostrict || continue
74 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
75 esac
76 done
77}
78
79# Remove occurrences of strings from variable given in $1
80# Strings removed are matched as globs, so for example
81# '-O*' would remove -O1, -O2 etc.
82_filter-var() {
83 local f x VAR VAL
84 declare -a new
85
86 VAR=$1
87 shift
88 eval VAL=\${${VAR}}
89 for f in ${VAL}; do
90 for x in "$@"; do
91 # Note this should work with globs like -O*
92 [[ ${f} == ${x} ]] && continue 2
93 done
94 eval new\[\${\#new\[@]}]=\${f}
95 done
96 eval export ${VAR}=\${new\[*]}
97}
98
99# @FUNCTION: filter-flags
100# @USAGE: <flags>
101# @DESCRIPTION:
102# Remove particular <flags> from {C,CPP,CXX,F,FC,LD}FLAGS. Accepts shell globs.
122filter-flags() { 103filter-flags() {
123 local x f fset 104 _filter-hardened "$@"
124 declare -a new_CFLAGS new_CXXFLAGS 105 local v
125 106 for v in C CPP CXX F FC LD ; do
126 for x in "$@" ; do 107 _filter-var ${v}FLAGS "$@"
127 case "${x}" in
128 -fPIC|-fpic|-fPIE|-fpie|-pie)
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 108 done
147 eval export ${fset}=\${new_${fset}\[*]}
148 done
149
150 return 0 109 return 0
151} 110}
152 111
112# @FUNCTION: filter-lfs-flags
113# @DESCRIPTION:
114# Remove flags that enable Large File Support.
153filter-lfs-flags() { 115filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 116 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
117 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
118 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
119 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
120 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
155 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 121 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
156} 122}
157 123
124# @FUNCTION: append-cppflags
125# @USAGE: <flags>
126# @DESCRIPTION:
127# Add extra <flags> to the current CPPFLAGS.
128append-cppflags() {
129 [[ $# -eq 0 ]] && return 0
130 export CPPFLAGS="${CPPFLAGS} $*"
131 return 0
132}
133
134# @FUNCTION: append-cflags
135# @USAGE: <flags>
136# @DESCRIPTION:
137# Add extra <flags> to the current CFLAGS.
138append-cflags() {
139 [[ $# -eq 0 ]] && return 0
140 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
141 return 0
142}
143
144# @FUNCTION: append-cxxflags
145# @USAGE: <flags>
146# @DESCRIPTION:
147# Add extra <flags> to the current CXXFLAGS.
148append-cxxflags() {
149 [[ $# -eq 0 ]] && return 0
150 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
151 return 0
152}
153
154# @FUNCTION: append-fflags
155# @USAGE: <flags>
156# @DESCRIPTION:
157# Add extra <flags> to the current {F,FC}FLAGS.
158append-fflags() {
159 [[ $# -eq 0 ]] && return 0
160 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
161 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
162 return 0
163}
164
165# @FUNCTION: append-lfs-flags
166# @DESCRIPTION:
167# Add flags that enable Large File Support.
158append-lfs-flags() { 168append-lfs-flags() {
159 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 169 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
170 # see comments in filter-lfs-flags func for meaning of these
160 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 171 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
161} 172}
162 173
174# @FUNCTION: append-flags
175# @USAGE: <flags>
176# @DESCRIPTION:
177# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
163append-flags() { 178append-flags() {
164 [[ -z $* ]] && return 0 179 [[ $# -eq 0 ]] && return 0
165 export CFLAGS="${CFLAGS} $*" 180 append-cflags "$@"
166 export CXXFLAGS="${CXXFLAGS} $*" 181 append-cxxflags "$@"
167 [ -n "`is-flag -fno-stack-protector`" -o \ 182 append-fflags "$@"
168 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
169 return 0 183 return 0
170} 184}
171 185
186# @FUNCTION: replace-flags
187# @USAGE: <old> <new>
188# @DESCRIPTION:
189# Replace the <old> flag with <new>. Accepts shell globs for <old>.
172replace-flags() { 190replace-flags() {
173 [[ $# != 2 ]] \ 191 [[ $# != 2 ]] \
174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 192 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
175 && die "replace-flags takes 2 arguments, not $#" 193 && die "replace-flags takes 2 arguments, not $#"
176 194
177 local f fset 195 local f fset
178 declare -a new_CFLAGS new_CXXFLAGS 196 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
179 197
180 for fset in CFLAGS CXXFLAGS; do 198 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
181 # Looping over the flags instead of using a global 199 # Looping over the flags instead of using a global
182 # substitution ensures that we're working with flag atoms. 200 # substitution ensures that we're working with flag atoms.
183 # Otherwise globs like -O* have the potential to wipe out the 201 # Otherwise globs like -O* have the potential to wipe out the
184 # list of flags. 202 # list of flags.
185 for f in ${!fset}; do 203 for f in ${!fset}; do
191 done 209 done
192 210
193 return 0 211 return 0
194} 212}
195 213
214# @FUNCTION: replace-cpu-flags
215# @USAGE: <old> <new>
216# @DESCRIPTION:
217# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
218# with flags that select the <new> cpu. Accepts shell globs for <old>.
196replace-cpu-flags() { 219replace-cpu-flags() {
197 local newcpu="$#" ; newcpu="${!newcpu}" 220 local newcpu="$#" ; newcpu="${!newcpu}"
198 while [ $# -gt 1 ] ; do 221 while [ $# -gt 1 ] ; do
199 # quote to make sure that no globbing is done (particularly on 222 # quote to make sure that no globbing is done (particularly on
200 # ${oldcpu} prior to calling replace-flags 223 # ${oldcpu}) prior to calling replace-flags
201 replace-flags "-march=${1}" "-march=${newcpu}" 224 replace-flags "-march=${1}" "-march=${newcpu}"
202 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 225 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
203 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 226 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
204 shift 227 shift
205 done 228 done
206 return 0 229 return 0
207} 230}
208 231
232_is_flagq() {
233 local x
234 for x in ${!1} ; do
235 [[ ${x} == $2 ]] && return 0
236 done
237 return 1
238}
239
240# @FUNCTION: is-flagq
241# @USAGE: <flag>
242# @DESCRIPTION:
243# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
244is-flagq() {
245 [[ -n $2 ]] && die "Usage: is-flag <flag>"
246 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
247}
248
249# @FUNCTION: is-flag
250# @USAGE: <flag>
251# @DESCRIPTION:
252# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
209is-flag() { 253is-flag() {
210 local x 254 is-flagq "$@" && 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} 255}
221 256
257# @FUNCTION: is-ldflagq
258# @USAGE: <flag>
259# @DESCRIPTION:
260# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
261is-ldflagq() {
262 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
263 _is_flagq LDFLAGS $1
264}
265
266# @FUNCTION: is-ldflag
267# @USAGE: <flag>
268# @DESCRIPTION:
269# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
270is-ldflag() {
271 is-ldflagq "$@" && echo true
272}
273
274# @FUNCTION: filter-mfpmath
275# @USAGE: <math types>
276# @DESCRIPTION:
277# Remove specified math types from the fpmath flag. For example, if the user
278# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
279# -mfpmath=386.
222filter-mfpmath() { 280filter-mfpmath() {
223 local orig_mfpmath new_math prune_math 281 local orig_mfpmath new_math prune_math
224 282
225 # save the original -mfpmath flag 283 # save the original -mfpmath flag
226 orig_mfpmath="`get-flag -mfpmath`" 284 orig_mfpmath=$(get-flag -mfpmath)
227 # get the value of the current -mfpmath flag 285 # get the value of the current -mfpmath flag
228 new_math=" `get-flag mfpmath | tr , ' '` " 286 new_math=$(get-flag mfpmath)
287 new_math=" ${new_math//,/ } "
229 # figure out which math values are to be removed 288 # figure out which math values are to be removed
230 prune_math="" 289 prune_math=""
231 for prune_math in "$@" ; do 290 for prune_math in "$@" ; do
232 new_math="${new_math/ ${prune_math} / }" 291 new_math=${new_math/ ${prune_math} / }
233 done 292 done
234 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 293 new_math=$(echo ${new_math})
294 new_math=${new_math// /,}
235 295
236 if [ -z "${new_math}" ] ; then 296 if [[ -z ${new_math} ]] ; then
237 # if we're removing all user specified math values are 297 # if we're removing all user specified math values are
238 # slated for removal, then we just filter the flag 298 # slated for removal, then we just filter the flag
239 filter-flags ${orig_mfpmath} 299 filter-flags ${orig_mfpmath}
240 else 300 else
241 # if we only want to filter some of the user specified 301 # if we only want to filter some of the user specified
243 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 303 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
244 fi 304 fi
245 return 0 305 return 0
246} 306}
247 307
308# @FUNCTION: strip-flags
309# @DESCRIPTION:
310# Strip C[XX]FLAGS of everything except known good/safe flags.
248strip-flags() { 311strip-flags() {
249 local x y flag NEW_CFLAGS NEW_CXXFLAGS 312 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
250 313
251 setup-allowed-flags 314 setup-allowed-flags
252 315
253 local NEW_CFLAGS="" 316 local NEW_CFLAGS=""
254 local NEW_CXXFLAGS="" 317 local NEW_CXXFLAGS=""
255 318 local NEW_FFLAGS=""
256 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 319 local NEW_FCFLAGS=""
257 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
258 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
259 fi
260 320
261 set -f # disable pathname expansion 321 set -f # disable pathname expansion
262 322
263 for x in ${CFLAGS}; do 323 for x in ${CFLAGS}; do
264 for y in ${ALLOWED_FLAGS}; do 324 for y in ${ALLOWED_FLAGS}; do
278 break 338 break
279 fi 339 fi
280 done 340 done
281 done 341 done
282 342
343 for x in ${FFLAGS}; do
344 for y in ${ALLOWED_FLAGS}; do
345 flag=${x%%=*}
346 if [ "${flag%%${y}}" = "" ] ; then
347 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
348 break
349 fi
350 done
351 done
352
353 for x in ${FCFLAGS}; do
354 for y in ${ALLOWED_FLAGS}; do
355 flag=${x%%=*}
356 if [ "${flag%%${y}}" = "" ] ; then
357 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
358 break
359 fi
360 done
361 done
362
283 # In case we filtered out all optimization flags fallback to -O2 363 # In case we filtered out all optimization flags fallback to -O2
284 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 364 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
285 NEW_CFLAGS="${NEW_CFLAGS} -O2" 365 NEW_CFLAGS="${NEW_CFLAGS} -O2"
286 fi 366 fi
287 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 367 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
288 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 368 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
289 fi 369 fi
370 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
371 NEW_FFLAGS="${NEW_FFLAGS} -O2"
372 fi
373 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
374 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
375 fi
290 376
291 set +f # re-enable pathname expansion 377 set +f # re-enable pathname expansion
292 378
293 export CFLAGS="${NEW_CFLAGS}" 379 export CFLAGS="${NEW_CFLAGS}"
294 export CXXFLAGS="${NEW_CXXFLAGS}" 380 export CXXFLAGS="${NEW_CXXFLAGS}"
381 export FFLAGS="${NEW_FFLAGS}"
382 export FCFLAGS="${NEW_FCFLAGS}"
295 return 0 383 return 0
296} 384}
297 385
298test-flag-PROG() { 386test-flag-PROG() {
299 local comp=$1 387 local comp=$1
300 local flags="$2" 388 local flags="$2"
301 389
302 [[ -z ${comp} || -z ${flags} ]] && \ 390 [[ -z ${comp} || -z ${flags} ]] && return 1
303 return 1
304 391
392 # use -c so we can test the assembler as well
305 local PROG=$(tc-get${comp}) 393 local PROG=$(tc-get${comp})
306 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 394 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
307 > /dev/null 2>&1 395 > /dev/null 2>&1
308} 396}
309 397
310# Returns true if C compiler support given flag 398# @FUNCTION: test-flag-CC
399# @USAGE: <flag>
400# @DESCRIPTION:
401# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
311test-flag-CC() { test-flag-PROG "CC" "$1"; } 402test-flag-CC() { test-flag-PROG "CC" "$1"; }
312 403
313# Returns true if C++ compiler support given flag 404# @FUNCTION: test-flag-CXX
405# @USAGE: <flag>
406# @DESCRIPTION:
407# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
314test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 408test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
409
410# @FUNCTION: test-flag-F77
411# @USAGE: <flag>
412# @DESCRIPTION:
413# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
414test-flag-F77() { test-flag-PROG "F77" "$1"; }
415
416# @FUNCTION: test-flag-FC
417# @USAGE: <flag>
418# @DESCRIPTION:
419# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
420test-flag-FC() { test-flag-PROG "FC" "$1"; }
315 421
316test-flags-PROG() { 422test-flags-PROG() {
317 local comp=$1 423 local comp=$1
318 local flags 424 local flags
319 local x 425 local x
320 426
321 shift 427 shift
322 428
323 [[ -z ${comp} ]] && \ 429 [[ -z ${comp} ]] && return 1
324 return 1
325 430
326 for x in "$@" ; do 431 for x in "$@" ; do
327 test-flag-${comp} "${x}" && flags="${flags} ${x}" 432 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
328 done 433 done
329 434
330 echo "${flags}" 435 echo "${flags}"
331 436
332 # Just bail if we dont have any flags 437 # Just bail if we dont have any flags
333 [[ -n ${flags} ]] 438 [[ -n ${flags} ]]
334} 439}
335 440
336# Returns (echo's) the given flags supported by the C compiler 441# @FUNCTION: test-flags-CC
442# @USAGE: <flags>
443# @DESCRIPTION:
444# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
337test-flags-CC() { test-flags-PROG "CC" "$@"; } 445test-flags-CC() { test-flags-PROG "CC" "$@"; }
338 446
339# Returns (echo's) the given flags supported by the C++ compiler 447# @FUNCTION: test-flags-CXX
448# @USAGE: <flags>
449# @DESCRIPTION:
450# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
340test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 451test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
341 452
453# @FUNCTION: test-flags-F77
454# @USAGE: <flags>
455# @DESCRIPTION:
456# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
457test-flags-F77() { test-flags-PROG "F77" "$@"; }
458
459# @FUNCTION: test-flags-FC
460# @USAGE: <flags>
461# @DESCRIPTION:
462# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
463test-flags-FC() { test-flags-PROG "FC" "$@"; }
464
465# @FUNCTION: test-flags
466# @USAGE: <flags>
467# @DESCRIPTION:
342# Short-hand that should hopefully work for both C and C++ compiler, but 468# Short-hand that should hopefully work for both C and C++ compiler, but
343# its really only present due to the append-flags() abomination. 469# its really only present due to the append-flags() abomination.
344test-flags() { test-flags-CC "$@"; } 470test-flags() { test-flags-CC "$@"; }
345 471
346# Depriciated, use test-flags() 472# @FUNCTION: test_version_info
347test_flag() { 473# @USAGE: <version>
348 addwrite "/dev/stderr" 474# @DESCRIPTION:
349 ewarn "test_flag: deprecated, please use test-flags()!" >/dev/stderr 475# Returns shell true if the current C compiler version matches <version>, else returns shell false.
350 476# Accepts shell globs.
351 test-flags-CC "$@"
352}
353
354test_version_info() { 477test_version_info() {
355 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 478 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
356 return 0 479 return 0
357 else 480 else
358 return 1 481 return 1
359 fi 482 fi
360} 483}
361 484
485# @FUNCTION: strip-unsupported-flags
486# @DESCRIPTION:
487# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
362strip-unsupported-flags() { 488strip-unsupported-flags() {
363 local x NEW_CFLAGS NEW_CXXFLAGS 489 export CFLAGS=$(test-flags-CC ${CFLAGS})
364 490 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
365 for x in ${CFLAGS} ; do 491 export FFLAGS=$(test-flags-F77 ${FFLAGS})
366 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})" 492 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
367 done
368 for x in ${CXXFLAGS} ; do
369 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
370 done
371
372 export CFLAGS=${NEW_CFLAGS}
373 export CXXFLAGS=${NEW_CXXFLAGS}
374} 493}
375 494
495# @FUNCTION: get-flag
496# @USAGE: <flag>
497# @DESCRIPTION:
498# Find and echo the value for a particular flag. Accepts shell globs.
376get-flag() { 499get-flag() {
377 local f findflag="$1" 500 local f findflag="$1"
378 501
379 # this code looks a little flaky but seems to work for 502 # this code looks a little flaky but seems to work for
380 # everything we want ... 503 # everything we want ...
381 # for example, if CFLAGS="-march=i686": 504 # for example, if CFLAGS="-march=i686":
382 # `get-flag -march` == "-march=i686" 505 # `get-flag -march` == "-march=i686"
383 # `get-flag march` == "i686" 506 # `get-flag march` == "i686"
384 for f in ${CFLAGS} ${CXXFLAGS} ; do 507 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
385 if [ "${f/${findflag}}" != "${f}" ] ; then 508 if [ "${f/${findflag}}" != "${f}" ] ; then
386 printf "%s\n" "${f/-${findflag}=}" 509 printf "%s\n" "${f/-${findflag}=}"
387 return 0 510 return 0
388 fi 511 fi
389 done 512 done
390 return 1 513 return 1
391} 514}
392 515
393# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 516# @FUNCTION: has_m64
394has_hardened() { 517# @DESCRIPTION:
395 addwrite "/dev/stderr" 518# This doesn't test if the flag is accepted, it tests if the flag actually
396 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" \ 519# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
397 >/dev/stderr 520# return code is 0, else the return code is 1.
398
399 test_version_info Hardened && return 0
400 # The specs file wont exist unless gcc has GCC_SPECS support
401 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
402}
403
404# DEPRECATED - use gcc-specs-pie from toolchain-funcs
405# indicate whether PIC is set
406has_pic() {
407 addwrite "/dev/stderr"
408 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >/dev/stderr
409
410 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
411 ${CFLAGS/-fpic} != ${CFLAGS} || \
412 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
413}
414
415# DEPRECATED - use gcc-specs-pie from toolchain-funcs
416# indicate whether PIE is set
417has_pie() {
418 addwrite "/dev/stderr"
419 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >/dev/stderr
420
421 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
422 ${CFLAGS/-fpie} != ${CFLAGS} || \
423 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__) || \
424 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
425 # test PIC while waiting for specs to be updated to generate __PIE__
426}
427
428# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
429# indicate whether code for SSP is being generated for all functions
430has_ssp_all() {
431 addwrite "/dev/stderr"
432 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >/dev/stderr
433
434 # note; this matches only -fstack-protector-all
435 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
436 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
437 gcc-specs-ssp
438}
439
440# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
441# indicate whether code for SSP is being generated
442has_ssp() {
443 addwrite "/dev/stderr"
444 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >/dev/stderr
445
446 # note; this matches both -fstack-protector and -fstack-protector-all
447 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
448 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
449 gcc-specs-ssp
450}
451
452has_m64() { 521has_m64() {
453 # this doesnt test if the flag is accepted, it tests if the flag 522 # this doesnt test if the flag is accepted, it tests if the flag
454 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 523 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
455 # please dont replace this function with test_flag in some future 524 # please dont replace this function with test_flag in some future
456 # clean-up! 525 # clean-up!
463 rm -f "${temp}".c 532 rm -f "${temp}".c
464 [[ ${ret} != 1 ]] && return 0 533 [[ ${ret} != 1 ]] && return 0
465 return 1 534 return 1
466} 535}
467 536
537# @FUNCTION: has_m32
538# @DESCRIPTION:
539# This doesn't test if the flag is accepted, it tests if the flag actually
540# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
541# code is 0, else return code is 1.
468has_m32() { 542has_m32() {
469 # this doesnt test if the flag is accepted, it tests if the flag 543 # this doesnt test if the flag is accepted, it tests if the flag
470 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 544 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
471 # please dont replace this function with test_flag in some future 545 # please dont replace this function with test_flag in some future
472 # clean-up! 546 # clean-up!
481 rm -f "${temp}".c 555 rm -f "${temp}".c
482 [[ ${ret} != 1 ]] && return 0 556 [[ ${ret} != 1 ]] && return 0
483 return 1 557 return 1
484} 558}
485 559
560# @FUNCTION: replace-sparc64-flags
561# @DESCRIPTION:
562# Sets mcpu to v8 and uses the original value as mtune if none specified.
486replace-sparc64-flags() { 563replace-sparc64-flags() {
487 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 564 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
488 565
489 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 566 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
490 for x in ${SPARC64_CPUS}; do 567 for x in ${SPARC64_CPUS}; do
491 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 568 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
492 done 569 done
493 else 570 else
494 for x in ${SPARC64_CPUS}; do 571 for x in ${SPARC64_CPUS}; do
495 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 572 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
496 done 573 done
497 fi 574 fi
498 575
499 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 576 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
500 for x in ${SPARC64_CPUS}; do 577 for x in ${SPARC64_CPUS}; do
501 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 578 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
502 done 579 done
503 else 580 else
504 for x in ${SPARC64_CPUS}; do 581 for x in ${SPARC64_CPUS}; do
505 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 582 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
506 done 583 done
507 fi 584 fi
508 585
509 export CFLAGS CXXFLAGS 586 export CFLAGS CXXFLAGS
510} 587}
511 588
589# @FUNCTION: append-libs
590# @USAGE: <libs>
591# @DESCRIPTION:
592# Add extra <libs> to the current LIBS.
593append-libs() {
594 [[ $# -eq 0 ]] && return 0
595 local flag
596 for flag in "$@"; do
597 [[ ${flag} == -l* ]] && flag=${flag#-l}
598 export LIBS="${LIBS} -l${flag}"
599 done
600
601 return 0
602}
603
604# @FUNCTION: append-ldflags
605# @USAGE: <flags>
606# @DESCRIPTION:
607# Add extra <flags> to the current LDFLAGS.
512append-ldflags() { 608append-ldflags() {
609 [[ $# -eq 0 ]] && return 0
610 local flag
611 for flag in "$@"; do
612 [[ ${flag} == -l* ]] && \
613 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
614 done
615
513 export LDFLAGS="${LDFLAGS} $*" 616 export LDFLAGS="${LDFLAGS} $*"
514 return 0 617 return 0
515} 618}
516 619
620# @FUNCTION: filter-ldflags
621# @USAGE: <flags>
622# @DESCRIPTION:
623# Remove particular <flags> from LDFLAGS. Accepts shell globs.
517filter-ldflags() { 624filter-ldflags() {
518 local x 625 _filter-var LDFLAGS "$@"
519
520 # we do this fancy spacing stuff so as to not filter
521 # out part of a flag ... we want flag atoms ! :D
522 LDFLAGS=" ${LDFLAGS} "
523 for x in "$@" ; do
524 LDFLAGS=${LDFLAGS// ${x} / }
525 done
526 [[ -z ${LDFLAGS// } ]] \
527 && LDFLAGS="" \
528 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
529 export LDFLAGS
530 return 0 626 return 0
531} 627}
532 628
533fstack-flags() { 629# @FUNCTION: raw-ldflags
534 if gcc-specs-ssp; then 630# @USAGE: [flags]
535 [ -z "`is-flag -fno-stack-protector`" ] && 631# @DESCRIPTION:
536 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 632# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
537 fi 633# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
538 return 0 634# to gcc where it needs the '-Wl,'.
539}
540
541# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
542# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
543# fixes.
544# 635#
545# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 636# If no flags are specified, then default to ${LDFLAGS}.
546gcc2-flags() { 637raw-ldflags() {
547 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then 638 local x input="$@"
548 CFLAGS=${CFLAGS//-mtune=/-mcpu=} 639 [[ -z ${input} ]] && input=${LDFLAGS}
549 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=} 640 set --
550 fi 641 for x in ${input} ; do
551 642 x=${x#-Wl,}
552 replace-cpu-flags k6-{2,3} k6 643 set -- "$@" ${x//,/ }
553 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686 644 done
554 645 echo "$@"
555 replace-cpu-flags pentium-mmx i586
556 replace-cpu-flags pentium{2,3,4} i686
557
558 replace-cpu-flags ev6{7,8} ev6
559
560 export CFLAGS CXXFLAGS
561} 646}
562 647
563# Gets the flags needed for "NOW" binding 648# @FUNCTION: no-as-needed
564bindnow-flags() { 649# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
650no-as-needed() {
565 case $($(tc-getLD) -v 2>&1 </dev/null) in 651 case $($(tc-getLD) -v 2>&1 </dev/null) in
566 *GNU* | *'with BFD'*) # GNU ld 652 *GNU*) # GNU ld
567 echo "-Wl,-z,now" ;; 653 echo "-Wl,--no-as-needed" ;;
568 *Apple*) # Darwin ld
569 echo "-bind_at_load" ;;
570 *)
571 # Some linkers just recognize -V instead of -v
572 case $($(tc-getLD) -V 2>&1 </dev/null) in
573 *Solaris*) # Solaris accept almost the same GNU options
574 echo "-Wl,-z,now" ;;
575 esac
576 ;;
577 esac 654 esac
578} 655}
656
657fi

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