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1# Copyright 1999-2005 Gentoo Foundation 1# Copyright 1999-2008 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 1.106 2006/02/19 23:18:30 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.124 2008/07/03 05:30:54 dberkholz Exp $
4 4
5# @ECLASS: flag-o-matic.eclass
6# @MAINTAINER:
7# toolchain@gentoo.org
8# @BLURB: common functions to manipulate and query toolchain flags
9# @DESCRIPTION:
10# This eclass contains a suite of functions to help developers sanely
11# and safely manage toolchain flags in their builds.
5 12
6# need access to emktemp()
7inherit eutils toolchain-funcs multilib 13inherit eutils toolchain-funcs multilib
8 14
9#
10#### filter-flags <flags> ####
11# Remove particular flags from C[XX]FLAGS
12# Matches only complete flags
13#
14#### append-flags <flags> ####
15# Add extra flags to your current C[XX]FLAGS
16#
17#### replace-flags <orig.flag> <new.flag> ###
18# Replace a flag by another one
19#
20#### replace-cpu-flags <old.cpus> <new.cpu> ###
21# Replace march/mcpu flags that specify <old.cpus>
22# with flags that specify <new.cpu>
23#
24#### is-flag[q] <flag> ####
25# Returns "true" if flag is set in C[XX]FLAGS
26# Matches only complete a flag
27# q version sets return code but doesn't echo
28#
29#### is-ldflag[q] <flag> ####
30# Returns "true" if flag is set in LDFLAGS
31# Matches only complete a flag
32# q version sets return code but doesn't echo
33#
34#### strip-flags ####
35# Strip C[XX]FLAGS of everything except known
36# good options.
37#
38#### strip-unsupported-flags ####
39# Strip C[XX]FLAGS of any flags not supported by
40# installed version of gcc
41#
42#### get-flag <flag> ####
43# Find and echo the value for a particular flag
44#
45#### replace-sparc64-flags ####
46# Sets mcpu to v8 and uses the original value
47# as mtune if none specified.
48#
49#### filter-mfpmath <math types> ####
50# Remove specified math types from the fpmath specification
51# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
52# will leave the user with -mfpmath=386
53#
54#### append-ldflags ####
55# Add extra flags to your current LDFLAGS
56#
57#### filter-ldflags <flags> ####
58# Remove particular flags from LDFLAGS
59# Matches only complete flags
60#
61#### bindnow-flags ####
62# Returns the flags to enable "now" binding in the current selected linker.
63#
64################ DEPRECATED functions ################ 15################ DEPRECATED functions ################
65# The following are still present to avoid breaking existing 16# The following are still present to avoid breaking existing
66# code more than necessary; however they are deprecated. Please 17# code more than necessary; however they are deprecated. Please
67# use gcc-specs-* from toolchain-funcs.eclass instead, if you 18# use gcc-specs-* from toolchain-funcs.eclass instead, if you
68# need to know which hardened techs are active in the compiler. 19# need to know which hardened techs are active in the compiler.
69# See bug #100974 20# See bug #100974
70# 21#
71#### has_hardened #### 22# has_hardened
72# Returns true if the compiler has 'Hardened' in its version string, 23# has_pie
73# (note; switched-spec vanilla compilers satisfy this condition) or 24# has_pic
74# the specs file name contains 'hardened'.
75#
76#### has_pie ####
77# Returns true if the compiler by default or with current CFLAGS
78# builds position-independent code.
79#
80#### has_pic ####
81# Returns true if the compiler by default or with current CFLAGS
82# builds position-independent code.
83#
84#### has_ssp_all #### 25# has_ssp_all
85# Returns true if the compiler by default or with current CFLAGS 26# has_ssp
86# generates stack smash protections for all functions
87#
88#### has_ssp ####
89# Returns true if the compiler by default or with current CFLAGS
90# generates stack smash protections for most vulnerable functions
91#
92 27
28
93# C[XX]FLAGS that we allow in strip-flags 29# {C,CXX,F,FC}FLAGS that we allow in strip-flags
30# Note: shell globs and character lists are allowed
94setup-allowed-flags() { 31setup-allowed-flags() {
95 if [[ -z ${ALLOWED_FLAGS} ]] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
96 export ALLOWED_FLAGS="-pipe" 33 export ALLOWED_FLAGS="-pipe"
97 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
102 fi 41 fi
103 # allow a bunch of flags that negate features / control ABI 42 # allow a bunch of flags that negate features / control ABI
104 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking"
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
106 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
107 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
108 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
109 -mieee -mieee-with-inexact \ 49 -mieee -mieee-with-inexact -mschedule \
110 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
111 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
112 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
113 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
54 -msecure-plt -D*"
114 55
115 # C[XX]FLAGS that we are think is ok, but needs testing 56 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
116 # NOTE: currently -Os have issues with gcc3 and K6* arch's 57 # NOTE: currently -Os have issues with gcc3 and K6* arch's
117 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
118 return 0 59 return 0
119} 60}
120 61
158 eval new\[\${\#new\[@]}]=\${f} 99 eval new\[\${\#new\[@]}]=\${f}
159 done 100 done
160 eval export ${VAR}=\${new\[*]} 101 eval export ${VAR}=\${new\[*]}
161} 102}
162 103
104# @FUNCTION: filter-flags
105# @USAGE: <flags>
106# @DESCRIPTION:
107# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
163filter-flags() { 108filter-flags() {
164 _filter-hardened "$@" 109 _filter-hardened "$@"
165 _filter-var CFLAGS "$@" 110 _filter-var CFLAGS "$@"
111 _filter-var CPPFLAGS "$@"
166 _filter-var CXXFLAGS "$@" 112 _filter-var CXXFLAGS "$@"
113 _filter-var FFLAGS "$@"
114 _filter-var FCFLAGS "$@"
167 return 0 115 return 0
168} 116}
169 117
118# @FUNCTION: filter-lfs-flags
119# @DESCRIPTION:
120# Remove flags that enable Large File Support.
170filter-lfs-flags() { 121filter-lfs-flags() {
171 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 122 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
172 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
173} 124}
174 125
126# @FUNCTION: append-cppflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Add extra <flags> to the current CPPFLAGS.
130append-cppflags() {
131 [[ -z $* ]] && return 0
132 export CPPFLAGS="${CPPFLAGS} $*"
133 return 0
134}
135
136# @FUNCTION: append-fflags
137# @USAGE: <flags>
138# @DESCRIPTION:
139# Add extra <flags> to the current {F,FC}FLAGS.
140append-fflags() {
141 [[ -z $* ]] && return 0
142 export FFLAGS="${FFLAGS} $*"
143 export FCFLAGS="${FCFLAGS} $*"
144 return 0
145}
146
147# @FUNCTION: append-lfs-flags
148# @DESCRIPTION:
149# Add flags that enable Large File Support.
175append-lfs-flags() { 150append-lfs-flags() {
176 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 151 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
177 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 152 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
178} 153}
179 154
155# @FUNCTION: append-flags
156# @USAGE: <flags>
157# @DESCRIPTION:
158# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
180append-flags() { 159append-flags() {
181 [[ -z $* ]] && return 0 160 [[ -z $* ]] && return 0
182 export CFLAGS="${CFLAGS} $*" 161 export CFLAGS="${CFLAGS} $*"
183 export CXXFLAGS="${CXXFLAGS} $*" 162 export CXXFLAGS="${CXXFLAGS} $*"
163 export FFLAGS="${FFLAGS} $*"
164 export FCFLAGS="${FCFLAGS} $*"
184 return 0 165 return 0
185} 166}
186 167
168# @FUNCTION: replace-flags
169# @USAGE: <old> <new>
170# @DESCRIPTION:
171# Replace the <old> flag with <new>. Accepts shell globs for <old>.
187replace-flags() { 172replace-flags() {
188 [[ $# != 2 ]] \ 173 [[ $# != 2 ]] \
189 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
190 && die "replace-flags takes 2 arguments, not $#" 175 && die "replace-flags takes 2 arguments, not $#"
191 176
192 local f fset 177 local f fset
193 declare -a new_CFLAGS new_CXXFLAGS 178 declare -a new_CFLAGS new_CXXFLAGS
194 179
195 for fset in CFLAGS CXXFLAGS; do 180 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
196 # Looping over the flags instead of using a global 181 # Looping over the flags instead of using a global
197 # substitution ensures that we're working with flag atoms. 182 # substitution ensures that we're working with flag atoms.
198 # Otherwise globs like -O* have the potential to wipe out the 183 # Otherwise globs like -O* have the potential to wipe out the
199 # list of flags. 184 # list of flags.
200 for f in ${!fset}; do 185 for f in ${!fset}; do
206 done 191 done
207 192
208 return 0 193 return 0
209} 194}
210 195
196# @FUNCTION: replace-cpu-flags
197# @USAGE: <old> <new>
198# @DESCRIPTION:
199# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
200# with flags that select the <new> cpu. Accepts shell globs for <old>.
211replace-cpu-flags() { 201replace-cpu-flags() {
212 local newcpu="$#" ; newcpu="${!newcpu}" 202 local newcpu="$#" ; newcpu="${!newcpu}"
213 while [ $# -gt 1 ] ; do 203 while [ $# -gt 1 ] ; do
214 # quote to make sure that no globbing is done (particularly on 204 # quote to make sure that no globbing is done (particularly on
215 # ${oldcpu} prior to calling replace-flags 205 # ${oldcpu}) prior to calling replace-flags
216 replace-flags "-march=${1}" "-march=${newcpu}" 206 replace-flags "-march=${1}" "-march=${newcpu}"
217 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 207 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
218 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 208 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
219 shift 209 shift
220 done 210 done
221 return 0 211 return 0
222} 212}
223 213
214_is_flagq() {
215 local x
216 for x in ${!1} ; do
217 [[ ${x} == $2 ]] && return 0
218 done
219 return 1
220}
221
222# @FUNCTION: is-flagq
223# @USAGE: <flag>
224# @DESCRIPTION:
225# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
224is-flagq() { 226is-flagq() {
225 local x 227 [[ -n $2 ]] && die "Usage: is-flag <flag>"
226 228 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
227 for x in ${CFLAGS} ${CXXFLAGS} ; do
228 # Note this should work with globs like -mcpu=ultrasparc*
229 if [[ ${x} == ${1} ]]; then
230 return 0
231 fi
232 done
233 return 1
234} 229}
235 230
231# @FUNCTION: is-flag
232# @USAGE: <flag>
233# @DESCRIPTION:
234# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
236is-flag() { 235is-flag() {
237 if is-flagq ${1}; then 236 is-flagq "$@" && echo true
238 echo true
239 return 0
240 fi
241 return 1
242} 237}
243 238
239# @FUNCTION: is-ldflagq
240# @USAGE: <flag>
241# @DESCRIPTION:
242# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
244is-ldflagq() { 243is-ldflagq() {
245 local x 244 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
246 245 _is_flagq LDFLAGS $1
247 for x in ${LDFLAGS} ; do
248 # Note this should work with globs like -mcpu=ultrasparc*
249 if [[ ${x} == ${1} ]]; then
250 return 0
251 fi
252 done
253 return 1
254} 246}
255 247
248# @FUNCTION: is-ldflag
249# @USAGE: <flag>
250# @DESCRIPTION:
251# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
256is-ldflag() { 252is-ldflag() {
257 if is-ldflagq ${1}; then 253 is-ldflagq "$@" && echo true
258 echo true
259 return 0
260 fi
261 return 1
262} 254}
263 255
256# @FUNCTION: filter-mfpmath
257# @USAGE: <math types>
258# @DESCRIPTION:
259# Remove specified math types from the fpmath flag. For example, if the user
260# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
261# -mfpmath=386.
264filter-mfpmath() { 262filter-mfpmath() {
265 local orig_mfpmath new_math prune_math 263 local orig_mfpmath new_math prune_math
266 264
267 # save the original -mfpmath flag 265 # save the original -mfpmath flag
268 orig_mfpmath="`get-flag -mfpmath`" 266 orig_mfpmath=$(get-flag -mfpmath)
269 # get the value of the current -mfpmath flag 267 # get the value of the current -mfpmath flag
270 new_math=" `get-flag mfpmath | tr , ' '` " 268 new_math=$(get-flag mfpmath)
269 new_math=" ${new_math//,/ } "
271 # figure out which math values are to be removed 270 # figure out which math values are to be removed
272 prune_math="" 271 prune_math=""
273 for prune_math in "$@" ; do 272 for prune_math in "$@" ; do
274 new_math="${new_math/ ${prune_math} / }" 273 new_math=${new_math/ ${prune_math} / }
275 done 274 done
276 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 275 new_math=$(echo ${new_math})
276 new_math=${new_math// /,}
277 277
278 if [ -z "${new_math}" ] ; then 278 if [[ -z ${new_math} ]] ; then
279 # if we're removing all user specified math values are 279 # if we're removing all user specified math values are
280 # slated for removal, then we just filter the flag 280 # slated for removal, then we just filter the flag
281 filter-flags ${orig_mfpmath} 281 filter-flags ${orig_mfpmath}
282 else 282 else
283 # if we only want to filter some of the user specified 283 # if we only want to filter some of the user specified
285 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 285 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
286 fi 286 fi
287 return 0 287 return 0
288} 288}
289 289
290# @FUNCTION: strip-flags
291# @DESCRIPTION:
292# Strip C[XX]FLAGS of everything except known good/safe flags.
290strip-flags() { 293strip-flags() {
291 local x y flag NEW_CFLAGS NEW_CXXFLAGS 294 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
292 295
293 setup-allowed-flags 296 setup-allowed-flags
294 297
295 local NEW_CFLAGS="" 298 local NEW_CFLAGS=""
296 local NEW_CXXFLAGS="" 299 local NEW_CXXFLAGS=""
300 local NEW_FFLAGS=""
301 local NEW_FCFLAGS=""
297 302
298 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 303 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
299 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 304 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
300 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 305 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
301 fi 306 fi
320 break 325 break
321 fi 326 fi
322 done 327 done
323 done 328 done
324 329
330 for x in ${FFLAGS}; do
331 for y in ${ALLOWED_FLAGS}; do
332 flag=${x%%=*}
333 if [ "${flag%%${y}}" = "" ] ; then
334 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
335 break
336 fi
337 done
338 done
339
340 for x in ${FCFLAGS}; do
341 for y in ${ALLOWED_FLAGS}; do
342 flag=${x%%=*}
343 if [ "${flag%%${y}}" = "" ] ; then
344 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
345 break
346 fi
347 done
348 done
349
325 # In case we filtered out all optimization flags fallback to -O2 350 # In case we filtered out all optimization flags fallback to -O2
326 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 351 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
327 NEW_CFLAGS="${NEW_CFLAGS} -O2" 352 NEW_CFLAGS="${NEW_CFLAGS} -O2"
328 fi 353 fi
329 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 354 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
330 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 355 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
331 fi 356 fi
357 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
358 NEW_FFLAGS="${NEW_FFLAGS} -O2"
359 fi
360 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
361 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
362 fi
332 363
333 set +f # re-enable pathname expansion 364 set +f # re-enable pathname expansion
334 365
335 export CFLAGS="${NEW_CFLAGS}" 366 export CFLAGS="${NEW_CFLAGS}"
336 export CXXFLAGS="${NEW_CXXFLAGS}" 367 export CXXFLAGS="${NEW_CXXFLAGS}"
368 export FFLAGS="${NEW_FFLAGS}"
369 export FCFLAGS="${NEW_FCFLAGS}"
337 return 0 370 return 0
338} 371}
339 372
340test-flag-PROG() { 373test-flag-PROG() {
341 local comp=$1 374 local comp=$1
347 local PROG=$(tc-get${comp}) 380 local PROG=$(tc-get${comp})
348 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 381 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
349 > /dev/null 2>&1 382 > /dev/null 2>&1
350} 383}
351 384
352# Returns true if C compiler support given flag 385# @FUNCTION: test-flag-CC
386# @USAGE: <flag>
387# @DESCRIPTION:
388# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
353test-flag-CC() { test-flag-PROG "CC" "$1"; } 389test-flag-CC() { test-flag-PROG "CC" "$1"; }
354 390
355# Returns true if C++ compiler support given flag 391# @FUNCTION: test-flag-CXX
392# @USAGE: <flag>
393# @DESCRIPTION:
394# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
356test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 395test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
396
397# @FUNCTION: test-flag-F77
398# @USAGE: <flag>
399# @DESCRIPTION:
400# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
401test-flag-F77() { test-flag-PROG "F77" "$1"; }
402
403# @FUNCTION: test-flag-FC
404# @USAGE: <flag>
405# @DESCRIPTION:
406# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
407test-flag-FC() { test-flag-PROG "FC" "$1"; }
357 408
358test-flags-PROG() { 409test-flags-PROG() {
359 local comp=$1 410 local comp=$1
360 local flags 411 local flags
361 local x 412 local x
362 413
363 shift 414 shift
364 415
365 [[ -z ${comp} ]] && \ 416 [[ -z ${comp} ]] && return 1
366 return 1
367 417
418 x=""
368 for x in "$@" ; do 419 for x in "$@" ; do
369 test-flag-${comp} "${x}" && flags="${flags} ${x}" 420 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
370 done 421 done
371 422
372 echo "${flags}" 423 echo "${flags}"
373 424
374 # Just bail if we dont have any flags 425 # Just bail if we dont have any flags
375 [[ -n ${flags} ]] 426 [[ -n ${flags} ]]
376} 427}
377 428
378# Returns (echo's) the given flags supported by the C compiler 429# @FUNCTION: test-flags-CC
430# @USAGE: <flags>
431# @DESCRIPTION:
432# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
379test-flags-CC() { test-flags-PROG "CC" "$@"; } 433test-flags-CC() { test-flags-PROG "CC" "$@"; }
380 434
381# Returns (echo's) the given flags supported by the C++ compiler 435# @FUNCTION: test-flags-CXX
436# @USAGE: <flags>
437# @DESCRIPTION:
438# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
382test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 439test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
383 440
441# @FUNCTION: test-flags-F77
442# @USAGE: <flags>
443# @DESCRIPTION:
444# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
445test-flags-F77() { test-flags-PROG "F77" "$@"; }
446
447# @FUNCTION: test-flags-FC
448# @USAGE: <flags>
449# @DESCRIPTION:
450# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
451test-flags-FC() { test-flags-PROG "FC" "$@"; }
452
453# @FUNCTION: test-flags
454# @USAGE: <flags>
455# @DESCRIPTION:
384# Short-hand that should hopefully work for both C and C++ compiler, but 456# Short-hand that should hopefully work for both C and C++ compiler, but
385# its really only present due to the append-flags() abomination. 457# its really only present due to the append-flags() abomination.
386test-flags() { test-flags-CC "$@"; } 458test-flags() { test-flags-CC "$@"; }
387 459
388# Depriciated, use test-flags() 460# @FUNCTION: test_flag
461# @DESCRIPTION:
462# DEPRICIATED, use test-flags()
389test_flag() { 463test_flag() {
390 ewarn "test_flag: deprecated, please use test-flags()!" >&2 464 ewarn "test_flag: deprecated, please use test-flags()!" >&2
391 465
392 test-flags-CC "$@" 466 test-flags-CC "$@"
393} 467}
394 468
469# @FUNCTION: test_version_info
470# @USAGE: <version>
471# @DESCRIPTION:
472# Returns shell true if the current C compiler version matches <version>, else returns shell false.
473# Accepts shell globs.
395test_version_info() { 474test_version_info() {
396 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 475 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
397 return 0 476 return 0
398 else 477 else
399 return 1 478 return 1
400 fi 479 fi
401} 480}
402 481
482# @FUNCTION: strip-unsupported-flags
483# @DESCRIPTION:
484# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
403strip-unsupported-flags() { 485strip-unsupported-flags() {
404 local x NEW_CFLAGS NEW_CXXFLAGS 486 export CFLAGS=$(test-flags-CC ${CFLAGS})
405 487 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
406 for x in ${CFLAGS} ; do 488 export FFLAGS=$(test-flags-F77 ${FFLAGS})
407 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})" 489 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
408 done
409 for x in ${CXXFLAGS} ; do
410 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
411 done
412
413 export CFLAGS=${NEW_CFLAGS}
414 export CXXFLAGS=${NEW_CXXFLAGS}
415} 490}
416 491
492# @FUNCTION: get-flag
493# @USAGE: <flag>
494# @DESCRIPTION:
495# Find and echo the value for a particular flag. Accepts shell globs.
417get-flag() { 496get-flag() {
418 local f findflag="$1" 497 local f findflag="$1"
419 498
420 # this code looks a little flaky but seems to work for 499 # this code looks a little flaky but seems to work for
421 # everything we want ... 500 # everything we want ...
422 # for example, if CFLAGS="-march=i686": 501 # for example, if CFLAGS="-march=i686":
423 # `get-flag -march` == "-march=i686" 502 # `get-flag -march` == "-march=i686"
424 # `get-flag march` == "i686" 503 # `get-flag march` == "i686"
425 for f in ${CFLAGS} ${CXXFLAGS} ; do 504 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
426 if [ "${f/${findflag}}" != "${f}" ] ; then 505 if [ "${f/${findflag}}" != "${f}" ] ; then
427 printf "%s\n" "${f/-${findflag}=}" 506 printf "%s\n" "${f/-${findflag}=}"
428 return 0 507 return 0
429 fi 508 fi
430 done 509 done
431 return 1 510 return 1
432} 511}
433 512
513# @FUNCTION: has_hardened
514# @DESCRIPTION:
434# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 515# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
435has_hardened() { 516has_hardened() {
436 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 517 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
437 518
438 test_version_info Hardened && return 0 519 test_version_info Hardened && return 0
439 # The specs file wont exist unless gcc has GCC_SPECS support 520 # The specs file wont exist unless gcc has GCC_SPECS support
440 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 521 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
441} 522}
442 523
524# @FUNCTION: has_pic
525# @DESCRIPTION:
443# DEPRECATED - use gcc-specs-pie from toolchain-funcs 526# DEPRECATED - use gcc-specs-pie from toolchain-funcs
444# indicate whether PIC is set 527# indicate whether PIC is set
445has_pic() { 528has_pic() {
446 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 529 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
447 530
448 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 531 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
449 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \ 532 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
450 gcc-specs-pie 533 gcc-specs-pie
451} 534}
452 535
536# @FUNCTION: has_pie
537# @DESCRIPTION:
453# DEPRECATED - use gcc-specs-pie from toolchain-funcs 538# DEPRECATED - use gcc-specs-pie from toolchain-funcs
454# indicate whether PIE is set 539# indicate whether PIE is set
455has_pie() { 540has_pie() {
456 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 541 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
457 542
458 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 543 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
459 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \ 544 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
460 gcc-specs-pie 545 gcc-specs-pie
461} 546}
462 547
548# @FUNCTION: has_ssp_all
549# @DESCRIPTION:
463# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 550# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
464# indicate whether code for SSP is being generated for all functions 551# indicate whether code for SSP is being generated for all functions
465has_ssp_all() { 552has_ssp_all() {
466 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 553 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
467 554
469 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 556 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
470 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 557 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
471 gcc-specs-ssp-all 558 gcc-specs-ssp-all
472} 559}
473 560
561# @FUNCTION: has_ssp
562# @DESCRIPTION:
474# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 563# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
475# indicate whether code for SSP is being generated 564# indicate whether code for SSP is being generated
476has_ssp() { 565has_ssp() {
477 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 566 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
478 567
480 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 569 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
481 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 570 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
482 gcc-specs-ssp 571 gcc-specs-ssp
483} 572}
484 573
574# @FUNCTION: has_m64
575# @DESCRIPTION:
576# This doesn't test if the flag is accepted, it tests if the flag actually
577# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
578# return code is 0, else the return code is 1.
485has_m64() { 579has_m64() {
486 # this doesnt test if the flag is accepted, it tests if the flag 580 # this doesnt test if the flag is accepted, it tests if the flag
487 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 581 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
488 # please dont replace this function with test_flag in some future 582 # please dont replace this function with test_flag in some future
489 # clean-up! 583 # clean-up!
496 rm -f "${temp}".c 590 rm -f "${temp}".c
497 [[ ${ret} != 1 ]] && return 0 591 [[ ${ret} != 1 ]] && return 0
498 return 1 592 return 1
499} 593}
500 594
595# @FUNCTION: has_m32
596# @DESCRIPTION:
597# This doesn't test if the flag is accepted, it tests if the flag actually
598# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
599# code is 0, else return code is 1.
501has_m32() { 600has_m32() {
502 # this doesnt test if the flag is accepted, it tests if the flag 601 # this doesnt test if the flag is accepted, it tests if the flag
503 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 602 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
504 # please dont replace this function with test_flag in some future 603 # please dont replace this function with test_flag in some future
505 # clean-up! 604 # clean-up!
514 rm -f "${temp}".c 613 rm -f "${temp}".c
515 [[ ${ret} != 1 ]] && return 0 614 [[ ${ret} != 1 ]] && return 0
516 return 1 615 return 1
517} 616}
518 617
618# @FUNCTION: replace-sparc64-flags
619# @DESCRIPTION:
620# Sets mcpu to v8 and uses the original value as mtune if none specified.
519replace-sparc64-flags() { 621replace-sparc64-flags() {
520 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 622 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
521 623
522 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 624 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
523 for x in ${SPARC64_CPUS}; do 625 for x in ${SPARC64_CPUS}; do
524 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 626 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
525 done 627 done
526 else 628 else
527 for x in ${SPARC64_CPUS}; do 629 for x in ${SPARC64_CPUS}; do
528 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 630 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
529 done 631 done
530 fi 632 fi
531 633
532 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 634 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
533 for x in ${SPARC64_CPUS}; do 635 for x in ${SPARC64_CPUS}; do
534 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 636 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
535 done 637 done
536 else 638 else
537 for x in ${SPARC64_CPUS}; do 639 for x in ${SPARC64_CPUS}; do
538 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 640 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
539 done 641 done
540 fi 642 fi
541 643
542 export CFLAGS CXXFLAGS 644 export CFLAGS CXXFLAGS
543} 645}
544 646
647# @FUNCTION: append-ldflags
648# @USAGE: <flags>
649# @DESCRIPTION:
650# Add extra <flags> to the current LDFLAGS.
545append-ldflags() { 651append-ldflags() {
546 [[ -z $* ]] && return 0 652 [[ -z $* ]] && return 0
653 local flag
654 for flag in "$@"; do
655 [[ ${flag} == -l* ]] && \
656 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
657 done
658
547 export LDFLAGS="${LDFLAGS} $*" 659 export LDFLAGS="${LDFLAGS} $*"
548 return 0 660 return 0
549} 661}
550 662
551# Remove flags from LDFLAGS - it's up to the ebuild to filter 663# @FUNCTION: filter-ldflags
552# CFLAGS and CXXFLAGS via filter-flags if they need to. 664# @USAGE: <flags>
665# @DESCRIPTION:
666# Remove particular <flags> from LDFLAGS. Accepts shell globs.
553filter-ldflags() { 667filter-ldflags() {
554 _filter-var LDFLAGS "$@" 668 _filter-var LDFLAGS "$@"
555 return 0 669 return 0
556} 670}
557 671
672# @FUNCTION: raw-ldflags
673# @USAGE: <flags>
674# @DESCRIPTION:
558# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 675# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
559# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 676# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
560# to gcc where it needs the '-Wl,'. 677# to gcc where it needs the '-Wl,'.
561raw-ldflags() { 678raw-ldflags() {
562 local x input="$@" 679 local x input="$@"
567 set -- "$@" ${x//,/ } 684 set -- "$@" ${x//,/ }
568 done 685 done
569 echo "$@" 686 echo "$@"
570} 687}
571 688
572# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 689# @FUNCTION: bindnow-flags
573# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 690# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
574# fixes. 691# @DESCRIPTION:
575#
576# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
577gcc2-flags() {
578 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
579 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
580 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
581 fi
582
583 replace-cpu-flags k6-{2,3} k6
584 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
585
586 replace-cpu-flags pentium-mmx i586
587 replace-cpu-flags pentium{2,3,4} i686
588
589 replace-cpu-flags ev6{7,8} ev6
590
591 export CFLAGS CXXFLAGS
592}
593
594# Gets the flags needed for "NOW" binding 692# DEPRECATED - Gets the flags needed for "NOW" binding
595bindnow-flags() { 693bindnow-flags() {
694 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" >&2
695
596 case $($(tc-getLD) -v 2>&1 </dev/null) in 696 case $($(tc-getLD) -v 2>&1 </dev/null) in
597 *GNU* | *'with BFD'*) # GNU ld 697 *GNU* | *'with BFD'*) # GNU ld
598 echo "-Wl,-z,now" ;; 698 echo "-Wl,-z,now" ;;
599 *Apple*) # Darwin ld 699 *Apple*) # Darwin ld
600 echo "-bind_at_load" ;; 700 echo "-bind_at_load" ;;
605 echo "-Wl,-z,now" ;; 705 echo "-Wl,-z,now" ;;
606 esac 706 esac
607 ;; 707 ;;
608 esac 708 esac
609} 709}
710
711
712# Some tests for when we screw with things and want to make
713# sure we didn't break anything
714#TESTS() {
715# CFLAGS="-a -b -c=1"
716# CXXFLAGS="-x -y -z=2"
717# LDFLAGS="-l -m -n=3"
718#
719# die() { exit 1; }
720# (is-flag 1 2 3) && die
721# (is-ldflag 1 2 3) && die
722#
723# is-flagq -l && die
724# is-ldflagq -a && die
725# is-flagq -a || die
726# is-flagq -x || die
727# is-ldflagq -n=* || die
728# is-ldflagq -n && die
729#
730# strip-unsupported-flags
731# [[ ${CFLAGS} == "-c=1" ]] || die
732# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
733#
734# echo "All tests pass"
735#}
736#TESTS

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