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1# Copyright 1999-2006 Gentoo Foundation 1# Copyright 1999-2012 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 1.115 2006/12/29 21:30:38 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.173 2012/05/31 00:29:06 vapier Exp $
4#
5# Maintainer: base-system@gentoo.org
6 4
7# need access to emktemp() 5# @ECLASS: flag-o-matic.eclass
6# @MAINTAINER:
7# toolchain@gentoo.org
8# @BLURB: common functions to manipulate and query toolchain flags
9# @DESCRIPTION:
10# This eclass contains a suite of functions to help developers sanely
11# and safely manage toolchain flags in their builds.
12
13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15
8inherit eutils toolchain-funcs multilib 16inherit eutils toolchain-funcs multilib
9 17
10# 18# Return all the flag variables that our high level funcs operate on.
11#### filter-flags <flags> #### 19all-flag-vars() {
12# Remove particular flags from C[XX]FLAGS 20 echo {C,CPP,CXX,CCAS,F,FC,LD}FLAGS
13# Matches only complete flags 21}
14#
15#### append-flags <flags> ####
16# Add extra flags to your current C[XX]FLAGS
17#
18#### replace-flags <orig.flag> <new.flag> ###
19# Replace a flag by another one
20#
21#### replace-cpu-flags <old.cpus> <new.cpu> ###
22# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu>
24#
25#### is-flag[q] <flag> ####
26# Returns "true" if flag is set in C[XX]FLAGS
27# Matches only complete a flag
28# q version sets return code but doesn't echo
29#
30#### is-ldflag[q] <flag> ####
31# Returns "true" if flag is set in LDFLAGS
32# Matches only complete a flag
33# q version sets return code but doesn't echo
34#
35#### strip-flags ####
36# Strip C[XX]FLAGS of everything except known
37# good options.
38#
39#### strip-unsupported-flags ####
40# Strip C[XX]FLAGS of any flags not supported by
41# installed version of gcc
42#
43#### get-flag <flag> ####
44# Find and echo the value for a particular flag
45#
46#### replace-sparc64-flags ####
47# Sets mcpu to v8 and uses the original value
48# as mtune if none specified.
49#
50#### filter-mfpmath <math types> ####
51# Remove specified math types from the fpmath specification
52# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
53# will leave the user with -mfpmath=386
54#
55#### append-ldflags ####
56# Add extra flags to your current LDFLAGS
57#
58#### filter-ldflags <flags> ####
59# Remove particular flags from LDFLAGS
60# Matches only complete flags
61#
62#### bindnow-flags ####
63# Returns the flags to enable "now" binding in the current selected linker.
64#
65################ DEPRECATED functions ################
66# The following are still present to avoid breaking existing
67# code more than necessary; however they are deprecated. Please
68# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# need to know which hardened techs are active in the compiler.
70# See bug #100974
71#
72#### has_hardened ####
73# Returns true if the compiler has 'Hardened' in its version string,
74# (note; switched-spec vanilla compilers satisfy this condition) or
75# the specs file name contains 'hardened'.
76#
77#### has_pie ####
78# Returns true if the compiler by default or with current CFLAGS
79# builds position-independent code.
80#
81#### has_pic ####
82# Returns true if the compiler by default or with current CFLAGS
83# builds position-independent code.
84#
85#### has_ssp_all ####
86# Returns true if the compiler by default or with current CFLAGS
87# generates stack smash protections for all functions
88#
89#### has_ssp ####
90# Returns true if the compiler by default or with current CFLAGS
91# generates stack smash protections for most vulnerable functions
92#
93 22
94# C[XX]FLAGS that we allow in strip-flags 23# {C,CXX,F,FC}FLAGS that we allow in strip-flags
24# Note: shell globs and character lists are allowed
95setup-allowed-flags() { 25setup-allowed-flags() {
96 if [[ -z ${ALLOWED_FLAGS} ]] ; then
97 export ALLOWED_FLAGS="-pipe" 26 ALLOWED_FLAGS="-pipe"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 27 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 28 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 29 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 30 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 31 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 32 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
104 fi 33 ALLOWED_FLAGS+=" -W* -w"
34
105 # allow a bunch of flags that negate features / control ABI 35 # allow a bunch of flags that negate features / control ABI
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 36 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
37 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
38 -fno-omit-frame-pointer"
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 39 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
108 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 40 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
41 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
109 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 42 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
110 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 43 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
111 -mieee -mieee-with-inexact -mschedule \ 44 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
112 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 45 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
113 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 46 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
114 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 47 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
115 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 48 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
116 -msecure-plt -D*"
117 49
118 # C[XX]FLAGS that we are think is ok, but needs testing 50 # 4.5
119 # NOTE: currently -Os have issues with gcc3 and K6* arch's 51 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
120 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 52 # 4.6
53 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
54
55 export ALLOWED_FLAGS
121 return 0 56 return 0
122} 57}
123 58
124# inverted filters for hardened compiler. This is trying to unpick 59# inverted filters for hardened compiler. This is trying to unpick
125# the hardened compiler defaults. 60# the hardened compiler defaults.
133 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 68 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
134 gcc-specs-pie || continue 69 gcc-specs-pie || continue
135 is-flagq -nopie || append-flags -nopie;; 70 is-flagq -nopie || append-flags -nopie;;
136 -fstack-protector) 71 -fstack-protector)
137 gcc-specs-ssp || continue 72 gcc-specs-ssp || continue
138 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 73 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
139 -fstack-protector-all) 74 -fstack-protector-all)
140 gcc-specs-ssp-to-all || continue 75 gcc-specs-ssp-to-all || continue
141 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 76 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
77 -fno-strict-overflow)
78 gcc-specs-nostrict || continue
79 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
142 esac 80 esac
143 done 81 done
144} 82}
145 83
146# Remove occurrences of strings from variable given in $1 84# Remove occurrences of strings from variable given in $1
147# Strings removed are matched as globs, so for example 85# Strings removed are matched as globs, so for example
148# '-O*' would remove -O1, -O2 etc. 86# '-O*' would remove -O1, -O2 etc.
149_filter-var() { 87_filter-var() {
150 local f x VAR VAL 88 local f x var=$1 new=()
151 declare -a new
152
153 VAR=$1
154 shift 89 shift
155 eval VAL=\${${VAR}} 90
156 for f in ${VAL}; do 91 for f in ${!var} ; do
157 for x in "$@"; do 92 for x in "$@" ; do
158 # Note this should work with globs like -O* 93 # Note this should work with globs like -O*
159 [[ ${f} == ${x} ]] && continue 2 94 [[ ${f} == ${x} ]] && continue 2
160 done 95 done
161 eval new\[\${\#new\[@]}]=\${f} 96 new+=( "${f}" )
162 done 97 done
163 eval export ${VAR}=\${new\[*]} 98 eval export ${var}=\""${new[*]}"\"
164} 99}
165 100
101# @FUNCTION: filter-flags
102# @USAGE: <flags>
103# @DESCRIPTION:
104# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
166filter-flags() { 105filter-flags() {
167 _filter-hardened "$@" 106 _filter-hardened "$@"
107 local v
108 for v in $(all-flag-vars) ; do
168 _filter-var CFLAGS "$@" 109 _filter-var ${v} "$@"
169 _filter-var CXXFLAGS "$@" 110 done
170 return 0 111 return 0
171} 112}
172 113
114# @FUNCTION: filter-lfs-flags
115# @DESCRIPTION:
116# Remove flags that enable Large File Support.
173filter-lfs-flags() { 117filter-lfs-flags() {
174 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 118 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
119 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
120 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
121 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
122 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
175 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 123 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
176} 124}
177 125
126# @FUNCTION: filter-ldflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Remove particular <flags> from LDFLAGS. Accepts shell globs.
130filter-ldflags() {
131 _filter-var LDFLAGS "$@"
132 return 0
133}
134
135# @FUNCTION: append-cppflags
136# @USAGE: <flags>
137# @DESCRIPTION:
138# Add extra <flags> to the current CPPFLAGS.
139append-cppflags() {
140 [[ $# -eq 0 ]] && return 0
141 export CPPFLAGS="${CPPFLAGS} $*"
142 return 0
143}
144
145# @FUNCTION: append-cflags
146# @USAGE: <flags>
147# @DESCRIPTION:
148# Add extra <flags> to the current CFLAGS.
149append-cflags() {
150 [[ $# -eq 0 ]] && return 0
151 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
152 return 0
153}
154
155# @FUNCTION: append-cxxflags
156# @USAGE: <flags>
157# @DESCRIPTION:
158# Add extra <flags> to the current CXXFLAGS.
159append-cxxflags() {
160 [[ $# -eq 0 ]] && return 0
161 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
162 return 0
163}
164
165# @FUNCTION: append-fflags
166# @USAGE: <flags>
167# @DESCRIPTION:
168# Add extra <flags> to the current {F,FC}FLAGS.
169append-fflags() {
170 [[ $# -eq 0 ]] && return 0
171 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
172 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
173 return 0
174}
175
176# @FUNCTION: append-lfs-flags
177# @DESCRIPTION:
178# Add flags that enable Large File Support.
178append-lfs-flags() { 179append-lfs-flags() {
179 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 180 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
181 # see comments in filter-lfs-flags func for meaning of these
180 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 182 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
181} 183}
182 184
185# @FUNCTION: append-ldflags
186# @USAGE: <flags>
187# @DESCRIPTION:
188# Add extra <flags> to the current LDFLAGS.
189append-ldflags() {
190 [[ $# -eq 0 ]] && return 0
191 local flag
192 for flag in "$@"; do
193 [[ ${flag} == -l* ]] && \
194 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
195 done
196
197 export LDFLAGS="${LDFLAGS} $*"
198 return 0
199}
200
201# @FUNCTION: append-flags
202# @USAGE: <flags>
203# @DESCRIPTION:
204# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
183append-flags() { 205append-flags() {
184 [[ -z $* ]] && return 0 206 [[ $# -eq 0 ]] && return 0
185 export CFLAGS="${CFLAGS} $*" 207 case " $* " in
186 export CXXFLAGS="${CXXFLAGS} $*" 208 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
209 *' '-L*|\
210 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
211 esac
212 append-cflags "$@"
213 append-cxxflags "$@"
214 append-fflags "$@"
187 return 0 215 return 0
188} 216}
189 217
218# @FUNCTION: replace-flags
219# @USAGE: <old> <new>
220# @DESCRIPTION:
221# Replace the <old> flag with <new>. Accepts shell globs for <old>.
190replace-flags() { 222replace-flags() {
191 [[ $# != 2 ]] \
192 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 223 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
193 && die "replace-flags takes 2 arguments, not $#"
194 224
195 local f fset 225 local f var new
196 declare -a new_CFLAGS new_CXXFLAGS 226 for var in $(all-flag-vars) ; do
197
198 for fset in CFLAGS CXXFLAGS; do
199 # Looping over the flags instead of using a global 227 # Looping over the flags instead of using a global
200 # substitution ensures that we're working with flag atoms. 228 # substitution ensures that we're working with flag atoms.
201 # Otherwise globs like -O* have the potential to wipe out the 229 # Otherwise globs like -O* have the potential to wipe out the
202 # list of flags. 230 # list of flags.
231 new=()
203 for f in ${!fset}; do 232 for f in ${!var} ; do
204 # Note this should work with globs like -O* 233 # Note this should work with globs like -O*
205 [[ ${f} == ${1} ]] && f=${2} 234 [[ ${f} == ${1} ]] && f=${2}
206 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 235 new+=( "${f}" )
207 done
208 eval export ${fset}=\${new_${fset}\[*]}
209 done 236 done
237 eval export ${var}=\""${new[*]}"\"
238 done
210 239
211 return 0 240 return 0
212} 241}
213 242
243# @FUNCTION: replace-cpu-flags
244# @USAGE: <old> <new>
245# @DESCRIPTION:
246# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
247# with flags that select the <new> cpu. Accepts shell globs for <old>.
214replace-cpu-flags() { 248replace-cpu-flags() {
215 local newcpu="$#" ; newcpu="${!newcpu}" 249 local newcpu="$#" ; newcpu="${!newcpu}"
216 while [ $# -gt 1 ] ; do 250 while [ $# -gt 1 ] ; do
217 # quote to make sure that no globbing is done (particularly on 251 # quote to make sure that no globbing is done (particularly on
218 # ${oldcpu}) prior to calling replace-flags 252 # ${oldcpu}) prior to calling replace-flags
230 [[ ${x} == $2 ]] && return 0 264 [[ ${x} == $2 ]] && return 0
231 done 265 done
232 return 1 266 return 1
233} 267}
234 268
269# @FUNCTION: is-flagq
270# @USAGE: <flag>
271# @DESCRIPTION:
272# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
235is-flagq() { 273is-flagq() {
236 [[ -n $2 ]] && die "Usage: is-flag <flag>" 274 [[ -n $2 ]] && die "Usage: is-flag <flag>"
237 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1
238}
239 275
276 local var
277 for var in $(all-flag-vars) ; do
278 _is_flagq ${var} "$1" && return 0
279 done
280 return 1
281}
282
283# @FUNCTION: is-flag
284# @USAGE: <flag>
285# @DESCRIPTION:
286# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
240is-flag() { 287is-flag() {
241 is-flagq "$@" && echo true 288 is-flagq "$@" && echo true
242} 289}
243 290
291# @FUNCTION: is-ldflagq
292# @USAGE: <flag>
293# @DESCRIPTION:
294# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
244is-ldflagq() { 295is-ldflagq() {
245 [[ -n $2 ]] && die "Usage: is-ldflag <flag>" 296 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
246 _is_flagq LDFLAGS $1 297 _is_flagq LDFLAGS $1
247} 298}
248 299
300# @FUNCTION: is-ldflag
301# @USAGE: <flag>
302# @DESCRIPTION:
303# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
249is-ldflag() { 304is-ldflag() {
250 is-ldflagq "$@" && echo true 305 is-ldflagq "$@" && echo true
251} 306}
252 307
308# @FUNCTION: filter-mfpmath
309# @USAGE: <math types>
310# @DESCRIPTION:
311# Remove specified math types from the fpmath flag. For example, if the user
312# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
313# -mfpmath=386.
253filter-mfpmath() { 314filter-mfpmath() {
254 local orig_mfpmath new_math prune_math 315 local orig_mfpmath new_math prune_math
255 316
256 # save the original -mfpmath flag 317 # save the original -mfpmath flag
257 orig_mfpmath=$(get-flag -mfpmath) 318 orig_mfpmath=$(get-flag -mfpmath)
276 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 337 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
277 fi 338 fi
278 return 0 339 return 0
279} 340}
280 341
342# @FUNCTION: strip-flags
343# @DESCRIPTION:
344# Strip C[XX]FLAGS of everything except known good/safe flags.
281strip-flags() { 345strip-flags() {
282 local x y flag NEW_CFLAGS NEW_CXXFLAGS 346 local x y var
283 347
284 setup-allowed-flags 348 setup-allowed-flags
285 349
286 local NEW_CFLAGS=""
287 local NEW_CXXFLAGS=""
288
289 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
290 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
291 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
292 fi
293
294 set -f # disable pathname expansion 350 set -f # disable pathname expansion
295 351
296 for x in ${CFLAGS}; do 352 for var in $(all-flag-vars) ; do
353 local new=()
354
355 for x in ${!var} ; do
356 local flag=${x%%=*}
297 for y in ${ALLOWED_FLAGS}; do 357 for y in ${ALLOWED_FLAGS} ; do
298 flag=${x%%=*}
299 if [ "${flag%%${y}}" = "" ] ; then 358 if [[ -z ${flag%%${y}} ]] ; then
300 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 359 new+=( "${x}" )
301 break 360 break
302 fi 361 fi
303 done 362 done
304 done 363 done
305 364
306 for x in ${CXXFLAGS}; do
307 for y in ${ALLOWED_FLAGS}; do
308 flag=${x%%=*}
309 if [ "${flag%%${y}}" = "" ] ; then
310 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
311 break
312 fi
313 done
314 done
315
316 # In case we filtered out all optimization flags fallback to -O2 365 # In case we filtered out all optimization flags fallback to -O2
317 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 366 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
318 NEW_CFLAGS="${NEW_CFLAGS} -O2" 367 new+=( -O2 )
319 fi 368 fi
320 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 369
321 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 370 eval export ${var}=\""${new[*]}"\"
322 fi 371 done
323 372
324 set +f # re-enable pathname expansion 373 set +f # re-enable pathname expansion
325 374
326 export CFLAGS="${NEW_CFLAGS}"
327 export CXXFLAGS="${NEW_CXXFLAGS}"
328 return 0 375 return 0
329} 376}
330 377
331test-flag-PROG() { 378test-flag-PROG() {
332 local comp=$1 379 local comp=$1
333 local flags="$2" 380 local flag=$2
334 381
335 [[ -z ${comp} || -z ${flags} ]] && \ 382 [[ -z ${comp} || -z ${flag} ]] && return 1
336 return 1
337 383
384 # use -c so we can test the assembler as well
338 local PROG=$(tc-get${comp}) 385 local PROG=$(tc-get${comp})
339 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 386 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
340 > /dev/null 2>&1 387 > /dev/null 2>&1
341} 388}
342 389
343# Returns true if C compiler support given flag 390# @FUNCTION: test-flag-CC
391# @USAGE: <flag>
392# @DESCRIPTION:
393# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
344test-flag-CC() { test-flag-PROG "CC" "$1"; } 394test-flag-CC() { test-flag-PROG "CC" "$1"; }
345 395
346# Returns true if C++ compiler support given flag 396# @FUNCTION: test-flag-CXX
397# @USAGE: <flag>
398# @DESCRIPTION:
399# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
347test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 400test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
401
402# @FUNCTION: test-flag-F77
403# @USAGE: <flag>
404# @DESCRIPTION:
405# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
406test-flag-F77() { test-flag-PROG "F77" "$1"; }
407
408# @FUNCTION: test-flag-FC
409# @USAGE: <flag>
410# @DESCRIPTION:
411# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
412test-flag-FC() { test-flag-PROG "FC" "$1"; }
348 413
349test-flags-PROG() { 414test-flags-PROG() {
350 local comp=$1 415 local comp=$1
351 local flags 416 local flags
352 local x 417 local x
353 418
354 shift 419 shift
355 420
356 [[ -z ${comp} ]] && return 1 421 [[ -z ${comp} ]] && return 1
357 422
358 x=""
359 for x in "$@" ; do 423 for x in "$@" ; do
360 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 424 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
361 done 425 done
362 426
363 echo "${flags}" 427 echo "${flags}"
364 428
365 # Just bail if we dont have any flags 429 # Just bail if we dont have any flags
366 [[ -n ${flags} ]] 430 [[ -n ${flags} ]]
367} 431}
368 432
369# Returns (echo's) the given flags supported by the C compiler 433# @FUNCTION: test-flags-CC
434# @USAGE: <flags>
435# @DESCRIPTION:
436# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
370test-flags-CC() { test-flags-PROG "CC" "$@"; } 437test-flags-CC() { test-flags-PROG "CC" "$@"; }
371 438
372# Returns (echo's) the given flags supported by the C++ compiler 439# @FUNCTION: test-flags-CXX
440# @USAGE: <flags>
441# @DESCRIPTION:
442# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
373test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 443test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
374 444
445# @FUNCTION: test-flags-F77
446# @USAGE: <flags>
447# @DESCRIPTION:
448# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
449test-flags-F77() { test-flags-PROG "F77" "$@"; }
450
451# @FUNCTION: test-flags-FC
452# @USAGE: <flags>
453# @DESCRIPTION:
454# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
455test-flags-FC() { test-flags-PROG "FC" "$@"; }
456
457# @FUNCTION: test-flags
458# @USAGE: <flags>
459# @DESCRIPTION:
375# Short-hand that should hopefully work for both C and C++ compiler, but 460# Short-hand that should hopefully work for both C and C++ compiler, but
376# its really only present due to the append-flags() abomination. 461# its really only present due to the append-flags() abomination.
377test-flags() { test-flags-CC "$@"; } 462test-flags() { test-flags-CC "$@"; }
378 463
379# Depriciated, use test-flags() 464# @FUNCTION: test_version_info
380test_flag() { 465# @USAGE: <version>
381 ewarn "test_flag: deprecated, please use test-flags()!" >&2 466# @DESCRIPTION:
382 467# Returns shell true if the current C compiler version matches <version>, else returns shell false.
383 test-flags-CC "$@" 468# Accepts shell globs.
384}
385
386test_version_info() { 469test_version_info() {
387 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 470 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
388 return 0 471 return 0
389 else 472 else
390 return 1 473 return 1
391 fi 474 fi
392} 475}
393 476
477# @FUNCTION: strip-unsupported-flags
478# @DESCRIPTION:
479# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
394strip-unsupported-flags() { 480strip-unsupported-flags() {
395 export CFLAGS=$(test-flags-CC ${CFLAGS}) 481 export CFLAGS=$(test-flags-CC ${CFLAGS})
396 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) 482 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
483 export FFLAGS=$(test-flags-F77 ${FFLAGS})
484 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
397} 485}
398 486
487# @FUNCTION: get-flag
488# @USAGE: <flag>
489# @DESCRIPTION:
490# Find and echo the value for a particular flag. Accepts shell globs.
399get-flag() { 491get-flag() {
400 local f findflag="$1" 492 local f var findflag="$1"
401 493
402 # this code looks a little flaky but seems to work for 494 # this code looks a little flaky but seems to work for
403 # everything we want ... 495 # everything we want ...
404 # for example, if CFLAGS="-march=i686": 496 # for example, if CFLAGS="-march=i686":
405 # `get-flag -march` == "-march=i686" 497 # `get-flag -march` == "-march=i686"
406 # `get-flag march` == "i686" 498 # `get-flag march` == "i686"
407 for f in ${CFLAGS} ${CXXFLAGS} ; do 499 for var in $(all-flag-vars) ; do
500 for f in ${!var} ; do
408 if [ "${f/${findflag}}" != "${f}" ] ; then 501 if [ "${f/${findflag}}" != "${f}" ] ; then
409 printf "%s\n" "${f/-${findflag}=}" 502 printf "%s\n" "${f/-${findflag}=}"
410 return 0 503 return 0
411 fi 504 fi
505 done
412 done 506 done
413 return 1 507 return 1
414} 508}
415 509
416# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 510# @FUNCTION: has_m64
417has_hardened() { 511# @DESCRIPTION:
418 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 512# This doesn't test if the flag is accepted, it tests if the flag actually
419 513# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
420 test_version_info Hardened && return 0 514# return code is 0, else the return code is 1.
421 # The specs file wont exist unless gcc has GCC_SPECS support
422 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
423}
424
425# DEPRECATED - use gcc-specs-pie from toolchain-funcs
426# indicate whether PIC is set
427has_pic() {
428 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
429
430 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
431 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
432 gcc-specs-pie
433}
434
435# DEPRECATED - use gcc-specs-pie from toolchain-funcs
436# indicate whether PIE is set
437has_pie() {
438 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
439
440 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
441 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
442 gcc-specs-pie
443}
444
445# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
446# indicate whether code for SSP is being generated for all functions
447has_ssp_all() {
448 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
449
450 # note; this matches only -fstack-protector-all
451 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
452 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
453 gcc-specs-ssp-all
454}
455
456# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
457# indicate whether code for SSP is being generated
458has_ssp() {
459 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
460
461 # note; this matches both -fstack-protector and -fstack-protector-all
462 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
463 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
464 gcc-specs-ssp
465}
466
467has_m64() { 515has_m64() {
516 eqawarn "${FUNCNAME}: don't use this anymore"
517
468 # this doesnt test if the flag is accepted, it tests if the flag 518 # this doesnt test if the flag is accepted, it tests if the flag
469 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 519 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
470 # please dont replace this function with test_flag in some future 520 # please dont replace this function with test_flag in some future
471 # clean-up! 521 # clean-up!
472 522
479 [[ ${ret} != 1 ]] && return 0 529 [[ ${ret} != 1 ]] && return 0
480 return 1 530 return 1
481} 531}
482 532
483has_m32() { 533has_m32() {
484 # this doesnt test if the flag is accepted, it tests if the flag 534 die "${FUNCNAME}: don't use this anymore"
485 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
486 # please dont replace this function with test_flag in some future
487 # clean-up!
488
489 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
490
491 local temp=$(emktemp)
492 echo "int main() { return(0); }" > "${temp}".c
493 MY_CC=$(tc-getCC)
494 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
495 local ret=$?
496 rm -f "${temp}".c
497 [[ ${ret} != 1 ]] && return 0
498 return 1
499} 535}
500 536
537# @FUNCTION: replace-sparc64-flags
538# @DESCRIPTION:
539# Sets mcpu to v8 and uses the original value as mtune if none specified.
501replace-sparc64-flags() { 540replace-sparc64-flags() {
502 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 541 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
503 542
504 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 543 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
505 for x in ${SPARC64_CPUS}; do 544 for x in ${SPARC64_CPUS}; do
522 fi 561 fi
523 562
524 export CFLAGS CXXFLAGS 563 export CFLAGS CXXFLAGS
525} 564}
526 565
566# @FUNCTION: append-libs
567# @USAGE: <libs>
568# @DESCRIPTION:
569# Add extra <libs> to the current LIBS.
527append-ldflags() { 570append-libs() {
528 [[ -z $* ]] && return 0 571 [[ $# -eq 0 ]] && return 0
529 export LDFLAGS="${LDFLAGS} $*" 572 local flag
530 return 0 573 for flag in "$@"; do
531} 574 [[ ${flag} == -l* ]] && flag=${flag#-l}
575 export LIBS="${LIBS} -l${flag}"
576 done
532 577
533# Remove flags from LDFLAGS - it's up to the ebuild to filter
534# CFLAGS and CXXFLAGS via filter-flags if they need to.
535filter-ldflags() {
536 _filter-var LDFLAGS "$@"
537 return 0 578 return 0
538} 579}
539 580
581# @FUNCTION: raw-ldflags
582# @USAGE: [flags]
583# @DESCRIPTION:
540# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 584# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
541# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 585# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
542# to gcc where it needs the '-Wl,'. 586# to gcc where it needs the '-Wl,'.
587#
588# If no flags are specified, then default to ${LDFLAGS}.
543raw-ldflags() { 589raw-ldflags() {
544 local x input="$@" 590 local x input="$@"
545 [[ -z ${input} ]] && input=${LDFLAGS} 591 [[ -z ${input} ]] && input=${LDFLAGS}
546 set -- 592 set --
547 for x in ${input} ; do 593 for x in ${input} ; do
549 set -- "$@" ${x//,/ } 595 set -- "$@" ${x//,/ }
550 done 596 done
551 echo "$@" 597 echo "$@"
552} 598}
553 599
554# Gets the flags needed for "NOW" binding 600# @FUNCTION: no-as-needed
555bindnow-flags() { 601# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
602no-as-needed() {
556 case $($(tc-getLD) -v 2>&1 </dev/null) in 603 case $($(tc-getLD) -v 2>&1 </dev/null) in
557 *GNU* | *'with BFD'*) # GNU ld 604 *GNU*) # GNU ld
558 echo "-Wl,-z,now" ;; 605 echo "-Wl,--no-as-needed" ;;
559 *Apple*) # Darwin ld
560 echo "-bind_at_load" ;;
561 *)
562 # Some linkers just recognize -V instead of -v
563 case $($(tc-getLD) -V 2>&1 </dev/null) in
564 *Solaris*) # Solaris accept almost the same GNU options
565 echo "-Wl,-z,now" ;;
566 esac
567 ;;
568 esac 606 esac
569} 607}
570 608
571 609fi
572# Some tests for when we screw with things and want to make
573# sure we didn't break anything
574#TESTS() {
575# CFLAGS="-a -b -c=1"
576# CXXFLAGS="-x -y -z=2"
577# LDFLAGS="-l -m -n=3"
578#
579# die() { exit 1; }
580# (is-flag 1 2 3) && die
581# (is-ldflag 1 2 3) && die
582#
583# is-flagq -l && die
584# is-ldflagq -a && die
585# is-flagq -a || die
586# is-flagq -x || die
587# is-ldflagq -n=* || die
588# is-ldflagq -n && die
589#
590# strip-unsupported-flags
591# [[ ${CFLAGS} == "-c=1" ]] || die
592# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
593#
594# echo "All tests pass"
595#}
596#TESTS

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