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1# Copyright 1999-2005 Gentoo Foundation 1# Copyright 1999-2009 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 1.135 2009/05/23 23:06:55 vapier Exp $
4 4
5# @ECLASS: flag-o-matic.eclass
6# @MAINTAINER:
7# toolchain@gentoo.org
8# @BLURB: common functions to manipulate and query toolchain flags
9# @DESCRIPTION:
10# This eclass contains a suite of functions to help developers sanely
11# and safely manage toolchain flags in their builds.
5 12
6# need access to emktemp()
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="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
100 export ALLOWED_FLAGS="${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="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
105 ALLOWED_FLAGS="${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 -m*-toc -D* -U*"
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
130 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 71 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
131 gcc-specs-pie || continue 72 gcc-specs-pie || continue
132 is-flagq -nopie || append-flags -nopie;; 73 is-flagq -nopie || append-flags -nopie;;
133 -fstack-protector) 74 -fstack-protector)
134 gcc-specs-ssp || continue 75 gcc-specs-ssp || continue
135 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 76 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
136 -fstack-protector-all) 77 -fstack-protector-all)
137 gcc-specs-ssp-to-all || continue 78 gcc-specs-ssp-to-all || continue
138 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 79 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
80 -fno-strict-overflow)
81 gcc-specs-nostrict || continue
82 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
139 esac 83 esac
140 done 84 done
141} 85}
142 86
143# Remove occurrences of strings from variable given in $1 87# Remove occurrences of strings from variable given in $1
158 eval new\[\${\#new\[@]}]=\${f} 102 eval new\[\${\#new\[@]}]=\${f}
159 done 103 done
160 eval export ${VAR}=\${new\[*]} 104 eval export ${VAR}=\${new\[*]}
161} 105}
162 106
107# @FUNCTION: filter-flags
108# @USAGE: <flags>
109# @DESCRIPTION:
110# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
163filter-flags() { 111filter-flags() {
164 _filter-hardened "$@" 112 _filter-hardened "$@"
165 _filter-var CFLAGS "$@" 113 _filter-var CFLAGS "$@"
114 _filter-var CPPFLAGS "$@"
166 _filter-var CXXFLAGS "$@" 115 _filter-var CXXFLAGS "$@"
116 _filter-var FFLAGS "$@"
117 _filter-var FCFLAGS "$@"
167 return 0 118 return 0
168} 119}
169 120
121# @FUNCTION: filter-lfs-flags
122# @DESCRIPTION:
123# Remove flags that enable Large File Support.
170filter-lfs-flags() { 124filter-lfs-flags() {
171 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 125 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
172 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 126 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
173} 127}
174 128
129# @FUNCTION: append-cppflags
130# @USAGE: <flags>
131# @DESCRIPTION:
132# Add extra <flags> to the current CPPFLAGS.
133append-cppflags() {
134 [[ -z $* ]] && return 0
135 export CPPFLAGS="${CPPFLAGS} $*"
136 return 0
137}
138
139# @FUNCTION: append-cxxflags
140# @USAGE: <flags>
141# @DESCRIPTION:
142# Add extra <flags> to the current CXXFLAGS.
143append-cxxflags() {
144 [[ -z $* ]] && return 0
145 export CXXFLAGS="${CXXFLAGS} $*"
146 return 0
147}
148
149# @FUNCTION: append-fflags
150# @USAGE: <flags>
151# @DESCRIPTION:
152# Add extra <flags> to the current {F,FC}FLAGS.
153append-fflags() {
154 [[ -z $* ]] && return 0
155 export FFLAGS="${FFLAGS} $*"
156 export FCFLAGS="${FCFLAGS} $*"
157 return 0
158}
159
160# @FUNCTION: append-lfs-flags
161# @DESCRIPTION:
162# Add flags that enable Large File Support.
175append-lfs-flags() { 163append-lfs-flags() {
176 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 164 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
177 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 165 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
178} 166}
179 167
168# @FUNCTION: append-flags
169# @USAGE: <flags>
170# @DESCRIPTION:
171# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
180append-flags() { 172append-flags() {
181 [[ -z $* ]] && return 0 173 [[ -z $* ]] && return 0
182 export CFLAGS="${CFLAGS} $*" 174 export CFLAGS="${CFLAGS} $*"
183 export CXXFLAGS="${CXXFLAGS} $*" 175 export CXXFLAGS="${CXXFLAGS} $*"
176 export FFLAGS="${FFLAGS} $*"
177 export FCFLAGS="${FCFLAGS} $*"
184 return 0 178 return 0
185} 179}
186 180
181# @FUNCTION: replace-flags
182# @USAGE: <old> <new>
183# @DESCRIPTION:
184# Replace the <old> flag with <new>. Accepts shell globs for <old>.
187replace-flags() { 185replace-flags() {
188 [[ $# != 2 ]] \ 186 [[ $# != 2 ]] \
189 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 187 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
190 && die "replace-flags takes 2 arguments, not $#" 188 && die "replace-flags takes 2 arguments, not $#"
191 189
192 local f fset 190 local f fset
193 declare -a new_CFLAGS new_CXXFLAGS 191 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
194 192
195 for fset in CFLAGS CXXFLAGS; do 193 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
196 # Looping over the flags instead of using a global 194 # Looping over the flags instead of using a global
197 # substitution ensures that we're working with flag atoms. 195 # substitution ensures that we're working with flag atoms.
198 # Otherwise globs like -O* have the potential to wipe out the 196 # Otherwise globs like -O* have the potential to wipe out the
199 # list of flags. 197 # list of flags.
200 for f in ${!fset}; do 198 for f in ${!fset}; do
206 done 204 done
207 205
208 return 0 206 return 0
209} 207}
210 208
209# @FUNCTION: replace-cpu-flags
210# @USAGE: <old> <new>
211# @DESCRIPTION:
212# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
213# with flags that select the <new> cpu. Accepts shell globs for <old>.
211replace-cpu-flags() { 214replace-cpu-flags() {
212 local newcpu="$#" ; newcpu="${!newcpu}" 215 local newcpu="$#" ; newcpu="${!newcpu}"
213 while [ $# -gt 1 ] ; do 216 while [ $# -gt 1 ] ; do
214 # quote to make sure that no globbing is done (particularly on 217 # quote to make sure that no globbing is done (particularly on
215 # ${oldcpu} prior to calling replace-flags 218 # ${oldcpu}) prior to calling replace-flags
216 replace-flags "-march=${1}" "-march=${newcpu}" 219 replace-flags "-march=${1}" "-march=${newcpu}"
217 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 220 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
218 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 221 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
219 shift 222 shift
220 done 223 done
221 return 0 224 return 0
222} 225}
223 226
227_is_flagq() {
228 local x
229 for x in ${!1} ; do
230 [[ ${x} == $2 ]] && return 0
231 done
232 return 1
233}
234
235# @FUNCTION: is-flagq
236# @USAGE: <flag>
237# @DESCRIPTION:
238# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
224is-flagq() { 239is-flagq() {
225 local x 240 [[ -n $2 ]] && die "Usage: is-flag <flag>"
226 241 _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} 242}
235 243
244# @FUNCTION: is-flag
245# @USAGE: <flag>
246# @DESCRIPTION:
247# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
236is-flag() { 248is-flag() {
237 if is-flagq ${1}; then 249 is-flagq "$@" && echo true
238 echo true
239 return 0
240 fi
241 return 1
242} 250}
243 251
252# @FUNCTION: is-ldflagq
253# @USAGE: <flag>
254# @DESCRIPTION:
255# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
244is-ldflagq() { 256is-ldflagq() {
245 local x 257 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
246 258 _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} 259}
255 260
261# @FUNCTION: is-ldflag
262# @USAGE: <flag>
263# @DESCRIPTION:
264# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
256is-ldflag() { 265is-ldflag() {
257 if is-ldflagq ${1}; then 266 is-ldflagq "$@" && echo true
258 echo true
259 return 0
260 fi
261 return 1
262} 267}
263 268
269# @FUNCTION: filter-mfpmath
270# @USAGE: <math types>
271# @DESCRIPTION:
272# Remove specified math types from the fpmath flag. For example, if the user
273# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
274# -mfpmath=386.
264filter-mfpmath() { 275filter-mfpmath() {
265 local orig_mfpmath new_math prune_math 276 local orig_mfpmath new_math prune_math
266 277
267 # save the original -mfpmath flag 278 # save the original -mfpmath flag
268 orig_mfpmath="`get-flag -mfpmath`" 279 orig_mfpmath=$(get-flag -mfpmath)
269 # get the value of the current -mfpmath flag 280 # get the value of the current -mfpmath flag
270 new_math=" `get-flag mfpmath | tr , ' '` " 281 new_math=$(get-flag mfpmath)
282 new_math=" ${new_math//,/ } "
271 # figure out which math values are to be removed 283 # figure out which math values are to be removed
272 prune_math="" 284 prune_math=""
273 for prune_math in "$@" ; do 285 for prune_math in "$@" ; do
274 new_math="${new_math/ ${prune_math} / }" 286 new_math=${new_math/ ${prune_math} / }
275 done 287 done
276 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 288 new_math=$(echo ${new_math})
289 new_math=${new_math// /,}
277 290
278 if [ -z "${new_math}" ] ; then 291 if [[ -z ${new_math} ]] ; then
279 # if we're removing all user specified math values are 292 # if we're removing all user specified math values are
280 # slated for removal, then we just filter the flag 293 # slated for removal, then we just filter the flag
281 filter-flags ${orig_mfpmath} 294 filter-flags ${orig_mfpmath}
282 else 295 else
283 # if we only want to filter some of the user specified 296 # if we only want to filter some of the user specified
285 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 298 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
286 fi 299 fi
287 return 0 300 return 0
288} 301}
289 302
303# @FUNCTION: strip-flags
304# @DESCRIPTION:
305# Strip C[XX]FLAGS of everything except known good/safe flags.
290strip-flags() { 306strip-flags() {
291 local x y flag NEW_CFLAGS NEW_CXXFLAGS 307 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
292 308
293 setup-allowed-flags 309 setup-allowed-flags
294 310
295 local NEW_CFLAGS="" 311 local NEW_CFLAGS=""
296 local NEW_CXXFLAGS="" 312 local NEW_CXXFLAGS=""
313 local NEW_FFLAGS=""
314 local NEW_FCFLAGS=""
297 315
298 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 316 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
299 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 317 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
300 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 318 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
301 fi 319 fi
320 break 338 break
321 fi 339 fi
322 done 340 done
323 done 341 done
324 342
343 for x in ${FFLAGS}; do
344 for y in ${ALLOWED_FLAGS}; do
345 flag=${x%%=*}
346 if [ "${flag%%${y}}" = "" ] ; then
347 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
348 break
349 fi
350 done
351 done
352
353 for x in ${FCFLAGS}; do
354 for y in ${ALLOWED_FLAGS}; do
355 flag=${x%%=*}
356 if [ "${flag%%${y}}" = "" ] ; then
357 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
358 break
359 fi
360 done
361 done
362
325 # In case we filtered out all optimization flags fallback to -O2 363 # In case we filtered out all optimization flags fallback to -O2
326 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 364 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
327 NEW_CFLAGS="${NEW_CFLAGS} -O2" 365 NEW_CFLAGS="${NEW_CFLAGS} -O2"
328 fi 366 fi
329 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 367 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
330 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 368 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
331 fi 369 fi
370 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
371 NEW_FFLAGS="${NEW_FFLAGS} -O2"
372 fi
373 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
374 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
375 fi
332 376
333 set +f # re-enable pathname expansion 377 set +f # re-enable pathname expansion
334 378
335 export CFLAGS="${NEW_CFLAGS}" 379 export CFLAGS="${NEW_CFLAGS}"
336 export CXXFLAGS="${NEW_CXXFLAGS}" 380 export CXXFLAGS="${NEW_CXXFLAGS}"
381 export FFLAGS="${NEW_FFLAGS}"
382 export FCFLAGS="${NEW_FCFLAGS}"
337 return 0 383 return 0
338} 384}
339 385
340test-flag-PROG() { 386test-flag-PROG() {
341 local comp=$1 387 local comp=$1
347 local PROG=$(tc-get${comp}) 393 local PROG=$(tc-get${comp})
348 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 394 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
349 > /dev/null 2>&1 395 > /dev/null 2>&1
350} 396}
351 397
352# Returns true if C compiler support given flag 398# @FUNCTION: test-flag-CC
399# @USAGE: <flag>
400# @DESCRIPTION:
401# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
353test-flag-CC() { test-flag-PROG "CC" "$1"; } 402test-flag-CC() { test-flag-PROG "CC" "$1"; }
354 403
355# Returns true if C++ compiler support given flag 404# @FUNCTION: test-flag-CXX
405# @USAGE: <flag>
406# @DESCRIPTION:
407# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
356test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 408test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
409
410# @FUNCTION: test-flag-F77
411# @USAGE: <flag>
412# @DESCRIPTION:
413# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
414test-flag-F77() { test-flag-PROG "F77" "$1"; }
415
416# @FUNCTION: test-flag-FC
417# @USAGE: <flag>
418# @DESCRIPTION:
419# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
420test-flag-FC() { test-flag-PROG "FC" "$1"; }
357 421
358test-flags-PROG() { 422test-flags-PROG() {
359 local comp=$1 423 local comp=$1
360 local flags 424 local flags
361 local x 425 local x
362 426
363 shift 427 shift
364 428
365 [[ -z ${comp} ]] && \ 429 [[ -z ${comp} ]] && return 1
366 return 1
367 430
431 x=""
368 for x in "$@" ; do 432 for x in "$@" ; do
369 test-flag-${comp} "${x}" && flags="${flags} ${x}" 433 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${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 [[ -n ${flags} ]]
376} 440}
377 441
378# Returns (echo's) the given flags supported by the C compiler 442# @FUNCTION: test-flags-CC
443# @USAGE: <flags>
444# @DESCRIPTION:
445# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
379test-flags-CC() { test-flags-PROG "CC" "$@"; } 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 "$@"; }
387 472
388# Depriciated, use test-flags() 473# @FUNCTION: test_flag
474# @DESCRIPTION:
475# DEPRICIATED, use test-flags()
389test_flag() { 476test_flag() {
390 ewarn "test_flag: deprecated, please use test-flags()!" >&2 477 ewarn "test_flag: deprecated, please use test-flags()!" >&2
391 478
392 test-flags-CC "$@" 479 test-flags-CC "$@"
393} 480}
394 481
482# @FUNCTION: test_version_info
483# @USAGE: <version>
484# @DESCRIPTION:
485# Returns shell true if the current C compiler version matches <version>, else returns shell false.
486# Accepts shell globs.
395test_version_info() { 487test_version_info() {
396 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 488 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
397 return 0 489 return 0
398 else 490 else
399 return 1 491 return 1
400 fi 492 fi
401} 493}
402 494
495# @FUNCTION: strip-unsupported-flags
496# @DESCRIPTION:
497# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
403strip-unsupported-flags() { 498strip-unsupported-flags() {
404 local x NEW_CFLAGS NEW_CXXFLAGS 499 export CFLAGS=$(test-flags-CC ${CFLAGS})
405 500 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
406 for x in ${CFLAGS} ; do 501 export FFLAGS=$(test-flags-F77 ${FFLAGS})
407 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})" 502 export FCFLAGS=$(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} 503}
416 504
505# @FUNCTION: get-flag
506# @USAGE: <flag>
507# @DESCRIPTION:
508# Find and echo the value for a particular flag. Accepts shell globs.
417get-flag() { 509get-flag() {
418 local f findflag="$1" 510 local f findflag="$1"
419 511
420 # this code looks a little flaky but seems to work for 512 # this code looks a little flaky but seems to work for
421 # everything we want ... 513 # everything we want ...
422 # for example, if CFLAGS="-march=i686": 514 # for example, if CFLAGS="-march=i686":
423 # `get-flag -march` == "-march=i686" 515 # `get-flag -march` == "-march=i686"
424 # `get-flag march` == "i686" 516 # `get-flag march` == "i686"
425 for f in ${CFLAGS} ${CXXFLAGS} ; do 517 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
426 if [ "${f/${findflag}}" != "${f}" ] ; then 518 if [ "${f/${findflag}}" != "${f}" ] ; then
427 printf "%s\n" "${f/-${findflag}=}" 519 printf "%s\n" "${f/-${findflag}=}"
428 return 0 520 return 0
429 fi 521 fi
430 done 522 done
431 return 1 523 return 1
432} 524}
433 525
526# @FUNCTION: has_hardened
527# @DESCRIPTION:
434# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 528# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
435has_hardened() { 529has_hardened() {
436 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 530 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
437 531
438 test_version_info Hardened && return 0 532 test_version_info Hardened && return 0
439 # The specs file wont exist unless gcc has GCC_SPECS support 533 # The specs file wont exist unless gcc has GCC_SPECS support
440 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 534 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
441} 535}
442 536
537# @FUNCTION: has_pic
538# @DESCRIPTION:
443# DEPRECATED - use gcc-specs-pie from toolchain-funcs 539# DEPRECATED - use gcc-specs-pie from toolchain-funcs
444# indicate whether PIC is set 540# indicate whether PIC is set
445has_pic() { 541has_pic() {
446 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 542 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
447 543
448 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 544 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
449 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \ 545 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
450 gcc-specs-pie 546 gcc-specs-pie
451} 547}
452 548
549# @FUNCTION: has_pie
550# @DESCRIPTION:
453# DEPRECATED - use gcc-specs-pie from toolchain-funcs 551# DEPRECATED - use gcc-specs-pie from toolchain-funcs
454# indicate whether PIE is set 552# indicate whether PIE is set
455has_pie() { 553has_pie() {
456 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 554 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
457 555
458 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 556 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
459 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \ 557 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
460 gcc-specs-pie 558 gcc-specs-pie
461} 559}
462 560
561# @FUNCTION: has_ssp_all
562# @DESCRIPTION:
463# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 563# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
464# indicate whether code for SSP is being generated for all functions 564# indicate whether code for SSP is being generated for all functions
465has_ssp_all() { 565has_ssp_all() {
466 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 566 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
467 567
468 # note; this matches only -fstack-protector-all 568 # note; this matches only -fstack-protector-all
469 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 569 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
470 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 570 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
471 gcc-specs-ssp-all 571 gcc-specs-ssp-to-all
472} 572}
473 573
574# @FUNCTION: has_ssp
575# @DESCRIPTION:
474# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 576# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
475# indicate whether code for SSP is being generated 577# indicate whether code for SSP is being generated
476has_ssp() { 578has_ssp() {
477 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 579 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
478 580
480 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 582 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
481 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 583 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
482 gcc-specs-ssp 584 gcc-specs-ssp
483} 585}
484 586
587# @FUNCTION: has_m64
588# @DESCRIPTION:
589# This doesn't test if the flag is accepted, it tests if the flag actually
590# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
591# return code is 0, else the return code is 1.
485has_m64() { 592has_m64() {
486 # this doesnt test if the flag is accepted, it tests if the flag 593 # this doesnt test if the flag is accepted, it tests if the flag
487 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 594 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
488 # please dont replace this function with test_flag in some future 595 # please dont replace this function with test_flag in some future
489 # clean-up! 596 # clean-up!
496 rm -f "${temp}".c 603 rm -f "${temp}".c
497 [[ ${ret} != 1 ]] && return 0 604 [[ ${ret} != 1 ]] && return 0
498 return 1 605 return 1
499} 606}
500 607
608# @FUNCTION: has_m32
609# @DESCRIPTION:
610# This doesn't test if the flag is accepted, it tests if the flag actually
611# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
612# code is 0, else return code is 1.
501has_m32() { 613has_m32() {
502 # this doesnt test if the flag is accepted, it tests if the flag 614 # this doesnt test if the flag is accepted, it tests if the flag
503 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 615 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
504 # please dont replace this function with test_flag in some future 616 # please dont replace this function with test_flag in some future
505 # clean-up! 617 # clean-up!
514 rm -f "${temp}".c 626 rm -f "${temp}".c
515 [[ ${ret} != 1 ]] && return 0 627 [[ ${ret} != 1 ]] && return 0
516 return 1 628 return 1
517} 629}
518 630
631# @FUNCTION: replace-sparc64-flags
632# @DESCRIPTION:
633# Sets mcpu to v8 and uses the original value as mtune if none specified.
519replace-sparc64-flags() { 634replace-sparc64-flags() {
520 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 635 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
521 636
522 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 637 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
523 for x in ${SPARC64_CPUS}; do 638 for x in ${SPARC64_CPUS}; do
524 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 639 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
525 done 640 done
526 else 641 else
527 for x in ${SPARC64_CPUS}; do 642 for x in ${SPARC64_CPUS}; do
528 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 643 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
529 done 644 done
530 fi 645 fi
531 646
532 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 647 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
533 for x in ${SPARC64_CPUS}; do 648 for x in ${SPARC64_CPUS}; do
534 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 649 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
535 done 650 done
536 else 651 else
537 for x in ${SPARC64_CPUS}; do 652 for x in ${SPARC64_CPUS}; do
538 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 653 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
539 done 654 done
540 fi 655 fi
541 656
542 export CFLAGS CXXFLAGS 657 export CFLAGS CXXFLAGS
543} 658}
544 659
660# @FUNCTION: append-ldflags
661# @USAGE: <flags>
662# @DESCRIPTION:
663# Add extra <flags> to the current LDFLAGS.
545append-ldflags() { 664append-ldflags() {
546 [[ -z $* ]] && return 0 665 [[ -z $* ]] && return 0
666 local flag
667 for flag in "$@"; do
668 [[ ${flag} == -l* ]] && \
669 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
670 done
671
547 export LDFLAGS="${LDFLAGS} $*" 672 export LDFLAGS="${LDFLAGS} $*"
548 return 0 673 return 0
549} 674}
550 675
551# Remove flags from LDFLAGS - it's up to the ebuild to filter 676# @FUNCTION: filter-ldflags
552# CFLAGS and CXXFLAGS via filter-flags if they need to. 677# @USAGE: <flags>
678# @DESCRIPTION:
679# Remove particular <flags> from LDFLAGS. Accepts shell globs.
553filter-ldflags() { 680filter-ldflags() {
554 _filter-var LDFLAGS "$@" 681 _filter-var LDFLAGS "$@"
555 return 0 682 return 0
556} 683}
557 684
685# @FUNCTION: raw-ldflags
686# @USAGE: <flags>
687# @DESCRIPTION:
558# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 688# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
559# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 689# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
560# to gcc where it needs the '-Wl,'. 690# to gcc where it needs the '-Wl,'.
561raw-ldflags() { 691raw-ldflags() {
562 local x input="$@" 692 local x input="$@"
567 set -- "$@" ${x//,/ } 697 set -- "$@" ${x//,/ }
568 done 698 done
569 echo "$@" 699 echo "$@"
570} 700}
571 701
572# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 702# @FUNCTION: bindnow-flags
573# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 703# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
574# fixes. 704# @DESCRIPTION:
705# DEPRECATED - Gets the flags needed for "NOW" binding
706bindnow-flags() {
707 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild"
708}
709
710
711# Some tests for when we screw with things and want to make
712# sure we didn't break anything
713#TESTS() {
714# CFLAGS="-a -b -c=1"
715# CXXFLAGS="-x -y -z=2"
716# LDFLAGS="-l -m -n=3"
575# 717#
576# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 718# die() { exit 1; }
577gcc2-flags() { 719# (is-flag 1 2 3) && die
578 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then 720# (is-ldflag 1 2 3) && die
579 CFLAGS=${CFLAGS//-mtune=/-mcpu=} 721#
580 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=} 722# is-flagq -l && die
581 fi 723# is-ldflagq -a && die
582 724# is-flagq -a || die
583 replace-cpu-flags k6-{2,3} k6 725# is-flagq -x || die
584 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686 726# is-ldflagq -n=* || die
585 727# is-ldflagq -n && die
586 replace-cpu-flags pentium-mmx i586 728#
587 replace-cpu-flags pentium{2,3,4} i686 729# strip-unsupported-flags
588 730# [[ ${CFLAGS} == "-c=1" ]] || die
589 replace-cpu-flags ev6{7,8} ev6 731# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
590 732#
591 export CFLAGS CXXFLAGS 733# echo "All tests pass"
592} 734#}
593 735#TESTS
594# Gets the flags needed for "NOW" binding
595bindnow-flags() {
596 case $($(tc-getLD) -v 2>&1 </dev/null) in
597 *GNU* | *'with BFD'*) # GNU ld
598 echo "-Wl,-z,now" ;;
599 *Apple*) # Darwin ld
600 echo "-bind_at_load" ;;
601 *)
602 # Some linkers just recognize -V instead of -v
603 case $($(tc-getLD) -V 2>&1 </dev/null) in
604 *Solaris*) # Solaris accept almost the same GNU options
605 echo "-Wl,-z,now" ;;
606 esac
607 ;;
608 esac
609}

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