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1# Copyright 1999-2007 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 1.119 2007/05/12 11:45:51 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.185 2012/12/03 21:20:54 vapier Exp $
4# 4
5# @ECLASS: flag-o-matic.eclass
6# @MAINTAINER:
5# Maintainer: toolchain@gentoo.org 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.
6 12
7# need access to emktemp() 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,CPP,CXX,CCAS,F,FC,LD}FLAGS that we allow in strip-flags
95# Note: shell globs and character lists are allowed 24# Note: shell globs and character lists are allowed
96setup-allowed-flags() { 25setup-allowed-flags() {
97 if [[ -z ${ALLOWED_FLAGS} ]] ; then
98 export ALLOWED_FLAGS="-pipe" 26 ALLOWED_FLAGS="-pipe"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 27 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 28 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking" 29 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 30 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+" 31 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
104 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 32 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
105 fi 33 ALLOWED_FLAGS+=" -W* -w"
34
106 # allow a bunch of flags that negate features / control ABI 35 # allow a bunch of flags that negate features / control ABI
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \ 36 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
108 -fno-strict-aliasing -fno-bounds-checking" 37 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
38 -fno-omit-frame-pointer"
109 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 39 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
110 -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 \
111 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 42 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
112 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 43 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
113 -mieee -mieee-with-inexact -mschedule \ 44 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
114 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 45 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
115 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 46 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
116 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 47 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
117 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 48 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -mfloat-abi \
118 -msecure-plt -D*" 49 -D* -U*"
119 50
120 # C[XX]FLAGS that we are think is ok, but needs testing 51 # 4.5
121 # NOTE: currently -Os have issues with gcc3 and K6* arch's 52 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
122 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 53 # 4.6
54 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
55 # 4.7
56 ALLOWED_FLAGS+=" -mno-avx2 -mno-bmi2 -mno-fma -mno-lzcnt"
57
58 # CPPFLAGS and LDFLAGS
59 ALLOWED_FLAGS+=" -I* -L* -R* -Wl,*"
60
61 export ALLOWED_FLAGS
123 return 0 62 return 0
124} 63}
125 64
126# inverted filters for hardened compiler. This is trying to unpick 65# inverted filters for hardened compiler. This is trying to unpick
127# the hardened compiler defaults. 66# the hardened compiler defaults.
135 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 74 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
136 gcc-specs-pie || continue 75 gcc-specs-pie || continue
137 is-flagq -nopie || append-flags -nopie;; 76 is-flagq -nopie || append-flags -nopie;;
138 -fstack-protector) 77 -fstack-protector)
139 gcc-specs-ssp || continue 78 gcc-specs-ssp || continue
140 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 79 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
141 -fstack-protector-all) 80 -fstack-protector-all)
142 gcc-specs-ssp-to-all || continue 81 gcc-specs-ssp-to-all || continue
143 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 82 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
83 -fno-strict-overflow)
84 gcc-specs-nostrict || continue
85 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
144 esac 86 esac
145 done 87 done
146} 88}
147 89
148# Remove occurrences of strings from variable given in $1 90# Remove occurrences of strings from variable given in $1
149# Strings removed are matched as globs, so for example 91# Strings removed are matched as globs, so for example
150# '-O*' would remove -O1, -O2 etc. 92# '-O*' would remove -O1, -O2 etc.
151_filter-var() { 93_filter-var() {
152 local f x VAR VAL 94 local f x var=$1 new=()
153 declare -a new
154
155 VAR=$1
156 shift 95 shift
157 eval VAL=\${${VAR}} 96
158 for f in ${VAL}; do 97 for f in ${!var} ; do
159 for x in "$@"; do 98 for x in "$@" ; do
160 # Note this should work with globs like -O* 99 # Note this should work with globs like -O*
161 [[ ${f} == ${x} ]] && continue 2 100 [[ ${f} == ${x} ]] && continue 2
162 done 101 done
163 eval new\[\${\#new\[@]}]=\${f} 102 new+=( "${f}" )
164 done 103 done
165 eval export ${VAR}=\${new\[*]} 104 eval export ${var}=\""${new[*]}"\"
166} 105}
167 106
107# @FUNCTION: filter-flags
108# @USAGE: <flags>
109# @DESCRIPTION:
110# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
168filter-flags() { 111filter-flags() {
169 _filter-hardened "$@" 112 _filter-hardened "$@"
113 local v
114 for v in $(all-flag-vars) ; do
170 _filter-var CFLAGS "$@" 115 _filter-var ${v} "$@"
171 _filter-var CPPFLAGS "$@" 116 done
172 _filter-var CXXFLAGS "$@"
173 return 0 117 return 0
174} 118}
175 119
120# @FUNCTION: filter-lfs-flags
121# @DESCRIPTION:
122# Remove flags that enable Large File Support.
176filter-lfs-flags() { 123filter-lfs-flags() {
177 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 124 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
125 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
126 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
127 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
128 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
178 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 129 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
179} 130}
180 131
132# @FUNCTION: filter-ldflags
133# @USAGE: <flags>
134# @DESCRIPTION:
135# Remove particular <flags> from LDFLAGS. Accepts shell globs.
136filter-ldflags() {
137 _filter-var LDFLAGS "$@"
138 return 0
139}
140
141# @FUNCTION: append-cppflags
142# @USAGE: <flags>
143# @DESCRIPTION:
144# Add extra <flags> to the current CPPFLAGS.
181append-cppflags() { 145append-cppflags() {
182 [[ -z $* ]] && return 0 146 [[ $# -eq 0 ]] && return 0
183 export CPPFLAGS="${CPPFLAGS} $*" 147 export CPPFLAGS="${CPPFLAGS} $*"
184 return 0 148 return 0
185} 149}
186 150
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.
187append-lfs-flags() { 185append-lfs-flags() {
188 [[ -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
189 append-cppflags -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
190} 189}
191 190
191# @FUNCTION: append-ldflags
192# @USAGE: <flags>
193# @DESCRIPTION:
194# Add extra <flags> to the current LDFLAGS.
195append-ldflags() {
196 [[ $# -eq 0 ]] && return 0
197 local flag
198 for flag in "$@"; do
199 [[ ${flag} == -l* ]] && \
200 eqawarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
201 done
202
203 export LDFLAGS="${LDFLAGS} $*"
204 return 0
205}
206
207# @FUNCTION: append-flags
208# @USAGE: <flags>
209# @DESCRIPTION:
210# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
192append-flags() { 211append-flags() {
193 [[ -z $* ]] && return 0 212 [[ $# -eq 0 ]] && return 0
194 export CFLAGS="${CFLAGS} $*" 213 case " $* " in
195 export CXXFLAGS="${CXXFLAGS} $*" 214 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
215 *' '-L*|\
216 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
217 esac
218 append-cflags "$@"
219 append-cxxflags "$@"
220 append-fflags "$@"
196 return 0 221 return 0
197} 222}
198 223
224# @FUNCTION: replace-flags
225# @USAGE: <old> <new>
226# @DESCRIPTION:
227# Replace the <old> flag with <new>. Accepts shell globs for <old>.
199replace-flags() { 228replace-flags() {
200 [[ $# != 2 ]] \
201 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 229 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
202 && die "replace-flags takes 2 arguments, not $#"
203 230
204 local f fset 231 local f var new
205 declare -a new_CFLAGS new_CXXFLAGS 232 for var in $(all-flag-vars) ; do
206
207 for fset in CFLAGS CXXFLAGS; do
208 # Looping over the flags instead of using a global 233 # Looping over the flags instead of using a global
209 # substitution ensures that we're working with flag atoms. 234 # substitution ensures that we're working with flag atoms.
210 # Otherwise globs like -O* have the potential to wipe out the 235 # Otherwise globs like -O* have the potential to wipe out the
211 # list of flags. 236 # list of flags.
237 new=()
212 for f in ${!fset}; do 238 for f in ${!var} ; do
213 # Note this should work with globs like -O* 239 # Note this should work with globs like -O*
214 [[ ${f} == ${1} ]] && f=${2} 240 [[ ${f} == ${1} ]] && f=${2}
215 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 241 new+=( "${f}" )
216 done
217 eval export ${fset}=\${new_${fset}\[*]}
218 done 242 done
243 eval export ${var}=\""${new[*]}"\"
244 done
219 245
220 return 0 246 return 0
221} 247}
222 248
249# @FUNCTION: replace-cpu-flags
250# @USAGE: <old> <new>
251# @DESCRIPTION:
252# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
253# with flags that select the <new> cpu. Accepts shell globs for <old>.
223replace-cpu-flags() { 254replace-cpu-flags() {
224 local newcpu="$#" ; newcpu="${!newcpu}" 255 local newcpu="$#" ; newcpu="${!newcpu}"
225 while [ $# -gt 1 ] ; do 256 while [ $# -gt 1 ] ; do
226 # quote to make sure that no globbing is done (particularly on 257 # quote to make sure that no globbing is done (particularly on
227 # ${oldcpu}) prior to calling replace-flags 258 # ${oldcpu}) prior to calling replace-flags
232 done 263 done
233 return 0 264 return 0
234} 265}
235 266
236_is_flagq() { 267_is_flagq() {
237 local x 268 local x var
269 eval var=\""\${$1[*]}"\"
238 for x in ${!1} ; do 270 for x in ${var} ; do
239 [[ ${x} == $2 ]] && return 0 271 [[ ${x} == $2 ]] && return 0
240 done 272 done
241 return 1 273 return 1
242} 274}
243 275
276# @FUNCTION: is-flagq
277# @USAGE: <flag>
278# @DESCRIPTION:
279# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
244is-flagq() { 280is-flagq() {
245 [[ -n $2 ]] && die "Usage: is-flag <flag>" 281 [[ -n $2 ]] && die "Usage: is-flag <flag>"
246 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1
247}
248 282
283 local var
284 for var in $(all-flag-vars) ; do
285 _is_flagq ${var} "$1" && return 0
286 done
287 return 1
288}
289
290# @FUNCTION: is-flag
291# @USAGE: <flag>
292# @DESCRIPTION:
293# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
249is-flag() { 294is-flag() {
250 is-flagq "$@" && echo true 295 is-flagq "$@" && echo true
251} 296}
252 297
298# @FUNCTION: is-ldflagq
299# @USAGE: <flag>
300# @DESCRIPTION:
301# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
253is-ldflagq() { 302is-ldflagq() {
254 [[ -n $2 ]] && die "Usage: is-ldflag <flag>" 303 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
255 _is_flagq LDFLAGS $1 304 _is_flagq LDFLAGS $1
256} 305}
257 306
307# @FUNCTION: is-ldflag
308# @USAGE: <flag>
309# @DESCRIPTION:
310# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
258is-ldflag() { 311is-ldflag() {
259 is-ldflagq "$@" && echo true 312 is-ldflagq "$@" && echo true
260} 313}
261 314
315# @FUNCTION: filter-mfpmath
316# @USAGE: <math types>
317# @DESCRIPTION:
318# Remove specified math types from the fpmath flag. For example, if the user
319# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
320# -mfpmath=386.
262filter-mfpmath() { 321filter-mfpmath() {
263 local orig_mfpmath new_math prune_math 322 local orig_mfpmath new_math prune_math
264 323
265 # save the original -mfpmath flag 324 # save the original -mfpmath flag
266 orig_mfpmath=$(get-flag -mfpmath) 325 orig_mfpmath=$(get-flag -mfpmath)
285 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 344 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
286 fi 345 fi
287 return 0 346 return 0
288} 347}
289 348
349# @FUNCTION: strip-flags
350# @DESCRIPTION:
351# Strip *FLAGS of everything except known good/safe flags. This runs over all
352# flags returned by all_flag_vars().
290strip-flags() { 353strip-flags() {
291 local x y flag NEW_CFLAGS NEW_CXXFLAGS 354 local x y var
292 355
293 setup-allowed-flags 356 setup-allowed-flags
294 357
295 local NEW_CFLAGS=""
296 local NEW_CXXFLAGS=""
297
298 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
299 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
300 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
301 fi
302
303 set -f # disable pathname expansion 358 set -f # disable pathname expansion
304 359
305 for x in ${CFLAGS}; do 360 for var in $(all-flag-vars) ; do
361 local new=()
362
363 for x in ${!var} ; do
364 local flag=${x%%=*}
306 for y in ${ALLOWED_FLAGS}; do 365 for y in ${ALLOWED_FLAGS} ; do
307 flag=${x%%=*}
308 if [ "${flag%%${y}}" = "" ] ; then 366 if [[ -z ${flag%%${y}} ]] ; then
309 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 367 new+=( "${x}" )
310 break 368 break
311 fi 369 fi
312 done 370 done
313 done 371 done
314 372
315 for x in ${CXXFLAGS}; do
316 for y in ${ALLOWED_FLAGS}; do
317 flag=${x%%=*}
318 if [ "${flag%%${y}}" = "" ] ; then
319 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
320 break
321 fi
322 done
323 done
324
325 # In case we filtered out all optimization flags fallback to -O2 373 # In case we filtered out all optimization flags fallback to -O2
326 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 374 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
327 NEW_CFLAGS="${NEW_CFLAGS} -O2" 375 new+=( -O2 )
328 fi 376 fi
329 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 377
330 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 378 eval export ${var}=\""${new[*]}"\"
331 fi 379 done
332 380
333 set +f # re-enable pathname expansion 381 set +f # re-enable pathname expansion
334 382
335 export CFLAGS="${NEW_CFLAGS}"
336 export CXXFLAGS="${NEW_CXXFLAGS}"
337 return 0 383 return 0
338} 384}
339 385
340test-flag-PROG() { 386test-flag-PROG() {
341 local comp=$1 387 local comp=$1
342 local flags="$2" 388 local lang=$2
389 local flag=$3
343 390
344 [[ -z ${comp} || -z ${flags} ]] && \ 391 [[ -z ${comp} || -z ${flag} ]] && return 1
345 return 1
346 392
393 # use -c so we can test the assembler as well
347 local PROG=$(tc-get${comp}) 394 local PROG=$(tc-get${comp})
348 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 395 ${PROG} "${flag}" -c -o /dev/null -x${lang} - < /dev/null \
349 > /dev/null 2>&1 396 > /dev/null 2>&1
350} 397}
351 398
352# Returns true if C compiler support given flag 399# @FUNCTION: test-flag-CC
400# @USAGE: <flag>
401# @DESCRIPTION:
402# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
353test-flag-CC() { test-flag-PROG "CC" "$1"; } 403test-flag-CC() { test-flag-PROG "CC" c "$1"; }
354 404
355# Returns true if C++ compiler support given flag 405# @FUNCTION: test-flag-CXX
406# @USAGE: <flag>
407# @DESCRIPTION:
408# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
356test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 409test-flag-CXX() { test-flag-PROG "CXX" c++ "$1"; }
410
411# @FUNCTION: test-flag-F77
412# @USAGE: <flag>
413# @DESCRIPTION:
414# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
415test-flag-F77() { test-flag-PROG "F77" f77 "$1"; }
416
417# @FUNCTION: test-flag-FC
418# @USAGE: <flag>
419# @DESCRIPTION:
420# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
421test-flag-FC() { test-flag-PROG "FC" f95 "$1"; }
357 422
358test-flags-PROG() { 423test-flags-PROG() {
359 local comp=$1 424 local comp=$1
360 local flags 425 local flags=()
361 local x 426 local x
362 427
363 shift 428 shift
364 429
365 [[ -z ${comp} ]] && return 1 430 [[ -z ${comp} ]] && return 1
366 431
367 x="" 432 for x ; do
368 for x in "$@" ; do
369 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 433 test-flag-${comp} "${x}" && flags+=( "${x}" )
370 done 434 done
371 435
372 echo "${flags}" 436 echo "${flags[*]}"
373 437
374 # Just bail if we dont have any flags 438 # Just bail if we dont have any flags
375 [[ -n ${flags} ]] 439 [[ ${#flags[@]} -gt 0 ]]
376} 440}
377 441
378# Returns (echo's) the given flags supported by the C compiler 442# @FUNCTION: test-flags-CC
443# @USAGE: <flags>
444# @DESCRIPTION:
445# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
379test-flags-CC() { test-flags-PROG "CC" "$@"; } 446test-flags-CC() { test-flags-PROG "CC" "$@"; }
380 447
381# Returns (echo's) the given flags supported by the C++ compiler 448# @FUNCTION: test-flags-CXX
449# @USAGE: <flags>
450# @DESCRIPTION:
451# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
382test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 452test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
383 453
454# @FUNCTION: test-flags-F77
455# @USAGE: <flags>
456# @DESCRIPTION:
457# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
458test-flags-F77() { test-flags-PROG "F77" "$@"; }
459
460# @FUNCTION: test-flags-FC
461# @USAGE: <flags>
462# @DESCRIPTION:
463# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
464test-flags-FC() { test-flags-PROG "FC" "$@"; }
465
466# @FUNCTION: test-flags
467# @USAGE: <flags>
468# @DESCRIPTION:
384# Short-hand that should hopefully work for both C and C++ compiler, but 469# Short-hand that should hopefully work for both C and C++ compiler, but
385# its really only present due to the append-flags() abomination. 470# its really only present due to the append-flags() abomination.
386test-flags() { test-flags-CC "$@"; } 471test-flags() { test-flags-CC "$@"; }
387 472
388# Depriciated, use test-flags() 473# @FUNCTION: test_version_info
389test_flag() { 474# @USAGE: <version>
390 ewarn "test_flag: deprecated, please use test-flags()!" >&2 475# @DESCRIPTION:
391 476# Returns shell true if the current C compiler version matches <version>, else returns shell false.
392 test-flags-CC "$@" 477# Accepts shell globs.
393}
394
395test_version_info() { 478test_version_info() {
396 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 479 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
397 return 0 480 return 0
398 else 481 else
399 return 1 482 return 1
400 fi 483 fi
401} 484}
402 485
486# @FUNCTION: strip-unsupported-flags
487# @DESCRIPTION:
488# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
403strip-unsupported-flags() { 489strip-unsupported-flags() {
404 export CFLAGS=$(test-flags-CC ${CFLAGS}) 490 export CFLAGS=$(test-flags-CC ${CFLAGS})
405 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) 491 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
492 export FFLAGS=$(test-flags-F77 ${FFLAGS})
493 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
406} 494}
407 495
496# @FUNCTION: get-flag
497# @USAGE: <flag>
498# @DESCRIPTION:
499# Find and echo the value for a particular flag. Accepts shell globs.
408get-flag() { 500get-flag() {
409 local f findflag="$1" 501 local f var findflag="$1"
410 502
411 # this code looks a little flaky but seems to work for 503 # this code looks a little flaky but seems to work for
412 # everything we want ... 504 # everything we want ...
413 # for example, if CFLAGS="-march=i686": 505 # for example, if CFLAGS="-march=i686":
414 # `get-flag -march` == "-march=i686" 506 # `get-flag -march` == "-march=i686"
415 # `get-flag march` == "i686" 507 # `get-flag march` == "i686"
416 for f in ${CFLAGS} ${CXXFLAGS} ; do 508 for var in $(all-flag-vars) ; do
509 for f in ${!var} ; do
417 if [ "${f/${findflag}}" != "${f}" ] ; then 510 if [ "${f/${findflag}}" != "${f}" ] ; then
418 printf "%s\n" "${f/-${findflag}=}" 511 printf "%s\n" "${f/-${findflag}=}"
419 return 0 512 return 0
420 fi 513 fi
514 done
421 done 515 done
422 return 1 516 return 1
423} 517}
424 518
425# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 519# @FUNCTION: has_m64
426has_hardened() { 520# @DESCRIPTION:
427 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 521# This doesn't test if the flag is accepted, it tests if the flag actually
428 522# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
429 test_version_info Hardened && return 0 523# return code is 0, else the return code is 1.
430 # The specs file wont exist unless gcc has GCC_SPECS support
431 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
432}
433
434# DEPRECATED - use gcc-specs-pie from toolchain-funcs
435# indicate whether PIC is set
436has_pic() {
437 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
438
439 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
440 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
441 gcc-specs-pie
442}
443
444# DEPRECATED - use gcc-specs-pie from toolchain-funcs
445# indicate whether PIE is set
446has_pie() {
447 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
448
449 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
450 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
451 gcc-specs-pie
452}
453
454# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
455# indicate whether code for SSP is being generated for all functions
456has_ssp_all() {
457 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
458
459 # note; this matches only -fstack-protector-all
460 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
461 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
462 gcc-specs-ssp-all
463}
464
465# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
466# indicate whether code for SSP is being generated
467has_ssp() {
468 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
469
470 # note; this matches both -fstack-protector and -fstack-protector-all
471 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
472 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
473 gcc-specs-ssp
474}
475
476has_m64() { 524has_m64() {
525 eqawarn "${FUNCNAME}: don't use this anymore"
526
477 # this doesnt test if the flag is accepted, it tests if the flag 527 # this doesnt test if the flag is accepted, it tests if the flag
478 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 528 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
479 # please dont replace this function with test_flag in some future 529 # please dont replace this function with test_flag in some future
480 # clean-up! 530 # clean-up!
481 531
488 [[ ${ret} != 1 ]] && return 0 538 [[ ${ret} != 1 ]] && return 0
489 return 1 539 return 1
490} 540}
491 541
492has_m32() { 542has_m32() {
493 # this doesnt test if the flag is accepted, it tests if the flag 543 die "${FUNCNAME}: don't use this anymore"
494 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
495 # please dont replace this function with test_flag in some future
496 # clean-up!
497
498 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
499
500 local temp=$(emktemp)
501 echo "int main() { return(0); }" > "${temp}".c
502 MY_CC=$(tc-getCC)
503 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
504 local ret=$?
505 rm -f "${temp}".c
506 [[ ${ret} != 1 ]] && return 0
507 return 1
508} 544}
509 545
546# @FUNCTION: replace-sparc64-flags
547# @DESCRIPTION:
548# Sets mcpu to v8 and uses the original value as mtune if none specified.
510replace-sparc64-flags() { 549replace-sparc64-flags() {
511 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 550 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
512 551
513 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 552 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
514 for x in ${SPARC64_CPUS}; do 553 for x in ${SPARC64_CPUS}; do
531 fi 570 fi
532 571
533 export CFLAGS CXXFLAGS 572 export CFLAGS CXXFLAGS
534} 573}
535 574
575# @FUNCTION: append-libs
576# @USAGE: <libs>
577# @DESCRIPTION:
578# Add extra <libs> to the current LIBS.
536append-ldflags() { 579append-libs() {
537 [[ -z $* ]] && return 0 580 [[ $# -eq 0 ]] && return 0
538 export LDFLAGS="${LDFLAGS} $*" 581 local flag
539 return 0 582 for flag in "$@"; do
540} 583 [[ ${flag} == -l* ]] && flag=${flag#-l}
584 export LIBS="${LIBS} -l${flag}"
585 done
541 586
542# Remove flags from LDFLAGS - it's up to the ebuild to filter
543# CFLAGS and CXXFLAGS via filter-flags if they need to.
544filter-ldflags() {
545 _filter-var LDFLAGS "$@"
546 return 0 587 return 0
547} 588}
548 589
590# @FUNCTION: raw-ldflags
591# @USAGE: [flags]
592# @DESCRIPTION:
549# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 593# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
550# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 594# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
551# to gcc where it needs the '-Wl,'. 595# to gcc where it needs the '-Wl,'.
596#
597# If no flags are specified, then default to ${LDFLAGS}.
552raw-ldflags() { 598raw-ldflags() {
553 local x input="$@" 599 local x input="$@"
554 [[ -z ${input} ]] && input=${LDFLAGS} 600 [[ -z ${input} ]] && input=${LDFLAGS}
555 set -- 601 set --
556 for x in ${input} ; do 602 for x in ${input} ; do
603 case ${x} in
604 -Wl,*)
557 x=${x#-Wl,} 605 x=${x#-Wl,}
558 set -- "$@" ${x//,/ } 606 set -- "$@" ${x//,/ }
607 ;;
608 *) # Assume it's a compiler driver flag, so throw it away #441808
609 ;;
610 esac
559 done 611 done
560 echo "$@" 612 echo "$@"
561} 613}
562 614
563# Gets the flags needed for "NOW" binding 615# @FUNCTION: no-as-needed
564bindnow-flags() { 616# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
617no-as-needed() {
565 case $($(tc-getLD) -v 2>&1 </dev/null) in 618 case $($(tc-getLD) -v 2>&1 </dev/null) in
566 *GNU* | *'with BFD'*) # GNU ld 619 *GNU*) # GNU ld
567 echo "-Wl,-z,now" ;; 620 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 621 esac
578} 622}
579 623
580 624fi
581# Some tests for when we screw with things and want to make
582# sure we didn't break anything
583#TESTS() {
584# CFLAGS="-a -b -c=1"
585# CXXFLAGS="-x -y -z=2"
586# LDFLAGS="-l -m -n=3"
587#
588# die() { exit 1; }
589# (is-flag 1 2 3) && die
590# (is-ldflag 1 2 3) && die
591#
592# is-flagq -l && die
593# is-ldflagq -a && die
594# is-flagq -a || die
595# is-flagq -x || die
596# is-ldflagq -n=* || die
597# is-ldflagq -n && die
598#
599# strip-unsupported-flags
600# [[ ${CFLAGS} == "-c=1" ]] || die
601# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
602#
603# echo "All tests pass"
604#}
605#TESTS

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