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1# Copyright 1999-2007 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 1.119 2007/05/12 11:45:51 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.170 2012/05/26 02:55:02 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,CXX,F,FC}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 -D* -U*"
118 -msecure-plt -D*"
119 49
120 # C[XX]FLAGS that we are think is ok, but needs testing 50 # 4.5
121 # NOTE: currently -Os have issues with gcc3 and K6* arch's 51 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
122 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
123 return 0 56 return 0
124} 57}
125 58
126# inverted filters for hardened compiler. This is trying to unpick 59# inverted filters for hardened compiler. This is trying to unpick
127# the hardened compiler defaults. 60# the hardened compiler defaults.
135 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 68 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
136 gcc-specs-pie || continue 69 gcc-specs-pie || continue
137 is-flagq -nopie || append-flags -nopie;; 70 is-flagq -nopie || append-flags -nopie;;
138 -fstack-protector) 71 -fstack-protector)
139 gcc-specs-ssp || continue 72 gcc-specs-ssp || continue
140 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 73 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
141 -fstack-protector-all) 74 -fstack-protector-all)
142 gcc-specs-ssp-to-all || continue 75 gcc-specs-ssp-to-all || continue
143 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);;
144 esac 80 esac
145 done 81 done
146} 82}
147 83
148# Remove occurrences of strings from variable given in $1 84# Remove occurrences of strings from variable given in $1
149# Strings removed are matched as globs, so for example 85# Strings removed are matched as globs, so for example
150# '-O*' would remove -O1, -O2 etc. 86# '-O*' would remove -O1, -O2 etc.
151_filter-var() { 87_filter-var() {
152 local f x VAR VAL 88 local f x var=$1 new=()
153 declare -a new
154
155 VAR=$1
156 shift 89 shift
157 eval VAL=\${${VAR}} 90
158 for f in ${VAL}; do 91 for f in ${!var} ; do
159 for x in "$@"; do 92 for x in "$@" ; do
160 # Note this should work with globs like -O* 93 # Note this should work with globs like -O*
161 [[ ${f} == ${x} ]] && continue 2 94 [[ ${f} == ${x} ]] && continue 2
162 done 95 done
163 eval new\[\${\#new\[@]}]=\${f} 96 new+=( "${f}" )
164 done 97 done
165 eval export ${VAR}=\${new\[*]} 98 eval export ${var}=\""${new[*]}"\"
166} 99}
167 100
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.
168filter-flags() { 105filter-flags() {
169 _filter-hardened "$@" 106 _filter-hardened "$@"
107 local v
108 for v in $(all-flag-vars) ; do
170 _filter-var CFLAGS "$@" 109 _filter-var ${v} "$@"
171 _filter-var CPPFLAGS "$@" 110 done
172 _filter-var CXXFLAGS "$@"
173 return 0 111 return 0
174} 112}
175 113
114# @FUNCTION: filter-lfs-flags
115# @DESCRIPTION:
116# Remove flags that enable Large File Support.
176filter-lfs-flags() { 117filter-lfs-flags() {
177 [[ -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)
178 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
179} 124}
180 125
126# @FUNCTION: append-cppflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Add extra <flags> to the current CPPFLAGS.
181append-cppflags() { 130append-cppflags() {
182 [[ -z $* ]] && return 0 131 [[ $# -eq 0 ]] && return 0
183 export CPPFLAGS="${CPPFLAGS} $*" 132 export CPPFLAGS="${CPPFLAGS} $*"
184 return 0 133 return 0
185} 134}
186 135
136# @FUNCTION: append-cflags
137# @USAGE: <flags>
138# @DESCRIPTION:
139# Add extra <flags> to the current CFLAGS.
140append-cflags() {
141 [[ $# -eq 0 ]] && return 0
142 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
143 return 0
144}
145
146# @FUNCTION: append-cxxflags
147# @USAGE: <flags>
148# @DESCRIPTION:
149# Add extra <flags> to the current CXXFLAGS.
150append-cxxflags() {
151 [[ $# -eq 0 ]] && return 0
152 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
153 return 0
154}
155
156# @FUNCTION: append-fflags
157# @USAGE: <flags>
158# @DESCRIPTION:
159# Add extra <flags> to the current {F,FC}FLAGS.
160append-fflags() {
161 [[ $# -eq 0 ]] && return 0
162 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
163 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
164 return 0
165}
166
167# @FUNCTION: append-lfs-flags
168# @DESCRIPTION:
169# Add flags that enable Large File Support.
187append-lfs-flags() { 170append-lfs-flags() {
188 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 171 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
172 # 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 173 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
190} 174}
191 175
176# @FUNCTION: append-flags
177# @USAGE: <flags>
178# @DESCRIPTION:
179# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
192append-flags() { 180append-flags() {
193 [[ -z $* ]] && return 0 181 [[ $# -eq 0 ]] && return 0
194 export CFLAGS="${CFLAGS} $*" 182 case " $* " in
195 export CXXFLAGS="${CXXFLAGS} $*" 183 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
184 *' '-L*) eqawarn 'please use append-ldflags for linker flags' ;;
185 esac
186 append-cflags "$@"
187 append-cxxflags "$@"
188 append-fflags "$@"
196 return 0 189 return 0
197} 190}
198 191
192# @FUNCTION: replace-flags
193# @USAGE: <old> <new>
194# @DESCRIPTION:
195# Replace the <old> flag with <new>. Accepts shell globs for <old>.
199replace-flags() { 196replace-flags() {
200 [[ $# != 2 ]] \
201 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 197 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
202 && die "replace-flags takes 2 arguments, not $#"
203 198
204 local f fset 199 local f var new
205 declare -a new_CFLAGS new_CXXFLAGS 200 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 201 # Looping over the flags instead of using a global
209 # substitution ensures that we're working with flag atoms. 202 # substitution ensures that we're working with flag atoms.
210 # Otherwise globs like -O* have the potential to wipe out the 203 # Otherwise globs like -O* have the potential to wipe out the
211 # list of flags. 204 # list of flags.
205 new=()
212 for f in ${!fset}; do 206 for f in ${!var} ; do
213 # Note this should work with globs like -O* 207 # Note this should work with globs like -O*
214 [[ ${f} == ${1} ]] && f=${2} 208 [[ ${f} == ${1} ]] && f=${2}
215 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 209 new+=( "${f}" )
216 done
217 eval export ${fset}=\${new_${fset}\[*]}
218 done 210 done
211 eval export ${var}=\""${new[*]}"\"
212 done
219 213
220 return 0 214 return 0
221} 215}
222 216
217# @FUNCTION: replace-cpu-flags
218# @USAGE: <old> <new>
219# @DESCRIPTION:
220# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
221# with flags that select the <new> cpu. Accepts shell globs for <old>.
223replace-cpu-flags() { 222replace-cpu-flags() {
224 local newcpu="$#" ; newcpu="${!newcpu}" 223 local newcpu="$#" ; newcpu="${!newcpu}"
225 while [ $# -gt 1 ] ; do 224 while [ $# -gt 1 ] ; do
226 # quote to make sure that no globbing is done (particularly on 225 # quote to make sure that no globbing is done (particularly on
227 # ${oldcpu}) prior to calling replace-flags 226 # ${oldcpu}) prior to calling replace-flags
239 [[ ${x} == $2 ]] && return 0 238 [[ ${x} == $2 ]] && return 0
240 done 239 done
241 return 1 240 return 1
242} 241}
243 242
243# @FUNCTION: is-flagq
244# @USAGE: <flag>
245# @DESCRIPTION:
246# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
244is-flagq() { 247is-flagq() {
245 [[ -n $2 ]] && die "Usage: is-flag <flag>" 248 [[ -n $2 ]] && die "Usage: is-flag <flag>"
246 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1
247}
248 249
250 local var
251 for var in $(all-flag-vars) ; do
252 _is_flagq ${var} "$1" && return 0
253 done
254 return 1
255}
256
257# @FUNCTION: is-flag
258# @USAGE: <flag>
259# @DESCRIPTION:
260# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
249is-flag() { 261is-flag() {
250 is-flagq "$@" && echo true 262 is-flagq "$@" && echo true
251} 263}
252 264
265# @FUNCTION: is-ldflagq
266# @USAGE: <flag>
267# @DESCRIPTION:
268# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
253is-ldflagq() { 269is-ldflagq() {
254 [[ -n $2 ]] && die "Usage: is-ldflag <flag>" 270 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
255 _is_flagq LDFLAGS $1 271 _is_flagq LDFLAGS $1
256} 272}
257 273
274# @FUNCTION: is-ldflag
275# @USAGE: <flag>
276# @DESCRIPTION:
277# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
258is-ldflag() { 278is-ldflag() {
259 is-ldflagq "$@" && echo true 279 is-ldflagq "$@" && echo true
260} 280}
261 281
282# @FUNCTION: filter-mfpmath
283# @USAGE: <math types>
284# @DESCRIPTION:
285# Remove specified math types from the fpmath flag. For example, if the user
286# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
287# -mfpmath=386.
262filter-mfpmath() { 288filter-mfpmath() {
263 local orig_mfpmath new_math prune_math 289 local orig_mfpmath new_math prune_math
264 290
265 # save the original -mfpmath flag 291 # save the original -mfpmath flag
266 orig_mfpmath=$(get-flag -mfpmath) 292 orig_mfpmath=$(get-flag -mfpmath)
285 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 311 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
286 fi 312 fi
287 return 0 313 return 0
288} 314}
289 315
316# @FUNCTION: strip-flags
317# @DESCRIPTION:
318# Strip C[XX]FLAGS of everything except known good/safe flags.
290strip-flags() { 319strip-flags() {
291 local x y flag NEW_CFLAGS NEW_CXXFLAGS 320 local x y var
292 321
293 setup-allowed-flags 322 setup-allowed-flags
294 323
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 324 set -f # disable pathname expansion
304 325
305 for x in ${CFLAGS}; do 326 for var in $(all-flag-vars) ; do
327 local new=()
328
329 for x in ${!var} ; do
330 local flag=${x%%=*}
306 for y in ${ALLOWED_FLAGS}; do 331 for y in ${ALLOWED_FLAGS} ; do
307 flag=${x%%=*}
308 if [ "${flag%%${y}}" = "" ] ; then 332 if [[ -z ${flag%%${y}} ]] ; then
309 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 333 new+=( "${x}" )
310 break 334 break
311 fi 335 fi
312 done 336 done
313 done 337 done
314 338
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} ${x}"
320 break
321 fi
322 done
323 done
324
325 # In case we filtered out all optimization flags fallback to -O2 339 # In case we filtered out all optimization flags fallback to -O2
326 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 340 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
327 NEW_CFLAGS="${NEW_CFLAGS} -O2" 341 new+=( -O2 )
328 fi 342 fi
329 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 343
330 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 344 eval export ${var}=\""${new[*]}"\"
331 fi 345 done
332 346
333 set +f # re-enable pathname expansion 347 set +f # re-enable pathname expansion
334 348
335 export CFLAGS="${NEW_CFLAGS}"
336 export CXXFLAGS="${NEW_CXXFLAGS}"
337 return 0 349 return 0
338} 350}
339 351
340test-flag-PROG() { 352test-flag-PROG() {
341 local comp=$1 353 local comp=$1
342 local flags="$2" 354 local flag=$2
343 355
344 [[ -z ${comp} || -z ${flags} ]] && \ 356 [[ -z ${comp} || -z ${flag} ]] && return 1
345 return 1
346 357
358 # use -c so we can test the assembler as well
347 local PROG=$(tc-get${comp}) 359 local PROG=$(tc-get${comp})
348 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 360 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
349 > /dev/null 2>&1 361 > /dev/null 2>&1
350} 362}
351 363
352# Returns true if C compiler support given flag 364# @FUNCTION: test-flag-CC
365# @USAGE: <flag>
366# @DESCRIPTION:
367# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
353test-flag-CC() { test-flag-PROG "CC" "$1"; } 368test-flag-CC() { test-flag-PROG "CC" "$1"; }
354 369
355# Returns true if C++ compiler support given flag 370# @FUNCTION: test-flag-CXX
371# @USAGE: <flag>
372# @DESCRIPTION:
373# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
356test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 374test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
375
376# @FUNCTION: test-flag-F77
377# @USAGE: <flag>
378# @DESCRIPTION:
379# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
380test-flag-F77() { test-flag-PROG "F77" "$1"; }
381
382# @FUNCTION: test-flag-FC
383# @USAGE: <flag>
384# @DESCRIPTION:
385# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
386test-flag-FC() { test-flag-PROG "FC" "$1"; }
357 387
358test-flags-PROG() { 388test-flags-PROG() {
359 local comp=$1 389 local comp=$1
360 local flags 390 local flags
361 local x 391 local x
362 392
363 shift 393 shift
364 394
365 [[ -z ${comp} ]] && return 1 395 [[ -z ${comp} ]] && return 1
366 396
367 x=""
368 for x in "$@" ; do 397 for x in "$@" ; do
369 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 398 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
370 done 399 done
371 400
372 echo "${flags}" 401 echo "${flags}"
373 402
374 # Just bail if we dont have any flags 403 # Just bail if we dont have any flags
375 [[ -n ${flags} ]] 404 [[ -n ${flags} ]]
376} 405}
377 406
378# Returns (echo's) the given flags supported by the C compiler 407# @FUNCTION: test-flags-CC
408# @USAGE: <flags>
409# @DESCRIPTION:
410# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
379test-flags-CC() { test-flags-PROG "CC" "$@"; } 411test-flags-CC() { test-flags-PROG "CC" "$@"; }
380 412
381# Returns (echo's) the given flags supported by the C++ compiler 413# @FUNCTION: test-flags-CXX
414# @USAGE: <flags>
415# @DESCRIPTION:
416# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
382test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 417test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
383 418
419# @FUNCTION: test-flags-F77
420# @USAGE: <flags>
421# @DESCRIPTION:
422# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
423test-flags-F77() { test-flags-PROG "F77" "$@"; }
424
425# @FUNCTION: test-flags-FC
426# @USAGE: <flags>
427# @DESCRIPTION:
428# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
429test-flags-FC() { test-flags-PROG "FC" "$@"; }
430
431# @FUNCTION: test-flags
432# @USAGE: <flags>
433# @DESCRIPTION:
384# Short-hand that should hopefully work for both C and C++ compiler, but 434# Short-hand that should hopefully work for both C and C++ compiler, but
385# its really only present due to the append-flags() abomination. 435# its really only present due to the append-flags() abomination.
386test-flags() { test-flags-CC "$@"; } 436test-flags() { test-flags-CC "$@"; }
387 437
388# Depriciated, use test-flags() 438# @FUNCTION: test_version_info
389test_flag() { 439# @USAGE: <version>
390 ewarn "test_flag: deprecated, please use test-flags()!" >&2 440# @DESCRIPTION:
391 441# Returns shell true if the current C compiler version matches <version>, else returns shell false.
392 test-flags-CC "$@" 442# Accepts shell globs.
393}
394
395test_version_info() { 443test_version_info() {
396 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 444 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
397 return 0 445 return 0
398 else 446 else
399 return 1 447 return 1
400 fi 448 fi
401} 449}
402 450
451# @FUNCTION: strip-unsupported-flags
452# @DESCRIPTION:
453# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
403strip-unsupported-flags() { 454strip-unsupported-flags() {
404 export CFLAGS=$(test-flags-CC ${CFLAGS}) 455 export CFLAGS=$(test-flags-CC ${CFLAGS})
405 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) 456 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
457 export FFLAGS=$(test-flags-F77 ${FFLAGS})
458 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
406} 459}
407 460
461# @FUNCTION: get-flag
462# @USAGE: <flag>
463# @DESCRIPTION:
464# Find and echo the value for a particular flag. Accepts shell globs.
408get-flag() { 465get-flag() {
409 local f findflag="$1" 466 local f var findflag="$1"
410 467
411 # this code looks a little flaky but seems to work for 468 # this code looks a little flaky but seems to work for
412 # everything we want ... 469 # everything we want ...
413 # for example, if CFLAGS="-march=i686": 470 # for example, if CFLAGS="-march=i686":
414 # `get-flag -march` == "-march=i686" 471 # `get-flag -march` == "-march=i686"
415 # `get-flag march` == "i686" 472 # `get-flag march` == "i686"
416 for f in ${CFLAGS} ${CXXFLAGS} ; do 473 for var in $(all-flag-vars) ; do
474 for f in ${!var} ; do
417 if [ "${f/${findflag}}" != "${f}" ] ; then 475 if [ "${f/${findflag}}" != "${f}" ] ; then
418 printf "%s\n" "${f/-${findflag}=}" 476 printf "%s\n" "${f/-${findflag}=}"
419 return 0 477 return 0
420 fi 478 fi
479 done
421 done 480 done
422 return 1 481 return 1
423} 482}
424 483
425# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 484# @FUNCTION: has_m64
426has_hardened() { 485# @DESCRIPTION:
427 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 486# This doesn't test if the flag is accepted, it tests if the flag actually
428 487# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
429 test_version_info Hardened && return 0 488# 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) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
473 gcc-specs-ssp
474}
475
476has_m64() { 489has_m64() {
490 eqawarn "${FUNCNAME}: don't use this anymore"
491
477 # this doesnt test if the flag is accepted, it tests if the flag 492 # 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! 493 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
479 # please dont replace this function with test_flag in some future 494 # please dont replace this function with test_flag in some future
480 # clean-up! 495 # clean-up!
481 496
488 [[ ${ret} != 1 ]] && return 0 503 [[ ${ret} != 1 ]] && return 0
489 return 1 504 return 1
490} 505}
491 506
492has_m32() { 507has_m32() {
493 # this doesnt test if the flag is accepted, it tests if the flag 508 die "${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 [[ ${ret} != 1 ]] && return 0
507 return 1
508} 509}
509 510
511# @FUNCTION: replace-sparc64-flags
512# @DESCRIPTION:
513# Sets mcpu to v8 and uses the original value as mtune if none specified.
510replace-sparc64-flags() { 514replace-sparc64-flags() {
511 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 515 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
512 516
513 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 517 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
514 for x in ${SPARC64_CPUS}; do 518 for x in ${SPARC64_CPUS}; do
531 fi 535 fi
532 536
533 export CFLAGS CXXFLAGS 537 export CFLAGS CXXFLAGS
534} 538}
535 539
540# @FUNCTION: append-libs
541# @USAGE: <libs>
542# @DESCRIPTION:
543# Add extra <libs> to the current LIBS.
544append-libs() {
545 [[ $# -eq 0 ]] && return 0
546 local flag
547 for flag in "$@"; do
548 [[ ${flag} == -l* ]] && flag=${flag#-l}
549 export LIBS="${LIBS} -l${flag}"
550 done
551
552 return 0
553}
554
555# @FUNCTION: append-ldflags
556# @USAGE: <flags>
557# @DESCRIPTION:
558# Add extra <flags> to the current LDFLAGS.
536append-ldflags() { 559append-ldflags() {
537 [[ -z $* ]] && return 0 560 [[ $# -eq 0 ]] && return 0
561 local flag
562 for flag in "$@"; do
563 [[ ${flag} == -l* ]] && \
564 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
565 done
566
538 export LDFLAGS="${LDFLAGS} $*" 567 export LDFLAGS="${LDFLAGS} $*"
539 return 0 568 return 0
540} 569}
541 570
542# Remove flags from LDFLAGS - it's up to the ebuild to filter 571# @FUNCTION: filter-ldflags
543# CFLAGS and CXXFLAGS via filter-flags if they need to. 572# @USAGE: <flags>
573# @DESCRIPTION:
574# Remove particular <flags> from LDFLAGS. Accepts shell globs.
544filter-ldflags() { 575filter-ldflags() {
545 _filter-var LDFLAGS "$@" 576 _filter-var LDFLAGS "$@"
546 return 0 577 return 0
547} 578}
548 579
580# @FUNCTION: raw-ldflags
581# @USAGE: [flags]
582# @DESCRIPTION:
549# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 583# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
550# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 584# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
551# to gcc where it needs the '-Wl,'. 585# to gcc where it needs the '-Wl,'.
586#
587# If no flags are specified, then default to ${LDFLAGS}.
552raw-ldflags() { 588raw-ldflags() {
553 local x input="$@" 589 local x input="$@"
554 [[ -z ${input} ]] && input=${LDFLAGS} 590 [[ -z ${input} ]] && input=${LDFLAGS}
555 set -- 591 set --
556 for x in ${input} ; do 592 for x in ${input} ; do
558 set -- "$@" ${x//,/ } 594 set -- "$@" ${x//,/ }
559 done 595 done
560 echo "$@" 596 echo "$@"
561} 597}
562 598
563# Gets the flags needed for "NOW" binding 599# @FUNCTION: no-as-needed
564bindnow-flags() { 600# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
601no-as-needed() {
565 case $($(tc-getLD) -v 2>&1 </dev/null) in 602 case $($(tc-getLD) -v 2>&1 </dev/null) in
566 *GNU* | *'with BFD'*) # GNU ld 603 *GNU*) # GNU ld
567 echo "-Wl,-z,now" ;; 604 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 605 esac
578} 606}
579 607
580 608fi
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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