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1# Copyright 1999-2006 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 1.108 2006/06/15 14:45:59 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.131 2009/01/08 11:29:06 gengor Exp $
4#
5# Maintainer: base-system@gentoo.org
6 4
7# need access to emktemp() 5# @ECLASS: flag-o-matic.eclass
6# @MAINTAINER:
7# toolchain@gentoo.org
8# @BLURB: common functions to manipulate and query toolchain flags
9# @DESCRIPTION:
10# This eclass contains a suite of functions to help developers sanely
11# and safely manage toolchain flags in their builds.
12
8inherit eutils toolchain-funcs multilib 13inherit eutils toolchain-funcs multilib
9 14
10#
11#### filter-flags <flags> ####
12# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags
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 ################ 15################ DEPRECATED functions ################
66# The following are still present to avoid breaking existing 16# The following are still present to avoid breaking existing
67# code more than necessary; however they are deprecated. Please 17# code more than necessary; however they are deprecated. Please
68# use gcc-specs-* from toolchain-funcs.eclass instead, if you 18# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# need to know which hardened techs are active in the compiler. 19# need to know which hardened techs are active in the compiler.
70# See bug #100974 20# See bug #100974
71# 21#
72#### has_hardened #### 22# has_hardened
73# Returns true if the compiler has 'Hardened' in its version string, 23# has_pie
74# (note; switched-spec vanilla compilers satisfy this condition) or 24# has_pic
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 #### 25# has_ssp_all
86# Returns true if the compiler by default or with current CFLAGS 26# has_ssp
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 27
28
94# 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
95setup-allowed-flags() { 31setup-allowed-flags() {
96 if [[ -z ${ALLOWED_FLAGS} ]] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
97 export ALLOWED_FLAGS="-pipe" 33 export ALLOWED_FLAGS="-pipe"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
104 fi 41 fi
105 # allow a bunch of flags that negate features / control ABI 42 # allow a bunch of flags that negate features / control ABI
106 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"
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
108 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
109 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
110 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
111 -mieee -mieee-with-inexact \ 49 -mieee -mieee-with-inexact -mschedule \
112 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
113 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
114 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
115 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
54 -msecure-plt -m*-toc -D* -U*"
116 55
117 # 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
118 # NOTE: currently -Os have issues with gcc3 and K6* arch's 57 # NOTE: currently -Os have issues with gcc3 and K6* arch's
119 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
120 return 0 59 return 0
121} 60}
122 61
132 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 71 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
133 gcc-specs-pie || continue 72 gcc-specs-pie || continue
134 is-flagq -nopie || append-flags -nopie;; 73 is-flagq -nopie || append-flags -nopie;;
135 -fstack-protector) 74 -fstack-protector)
136 gcc-specs-ssp || continue 75 gcc-specs-ssp || continue
137 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 76 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
138 -fstack-protector-all) 77 -fstack-protector-all)
139 gcc-specs-ssp-to-all || continue 78 gcc-specs-ssp-to-all || continue
140 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);;
141 esac 83 esac
142 done 84 done
143} 85}
144 86
145# Remove occurrences of strings from variable given in $1 87# Remove occurrences of strings from variable given in $1
160 eval new\[\${\#new\[@]}]=\${f} 102 eval new\[\${\#new\[@]}]=\${f}
161 done 103 done
162 eval export ${VAR}=\${new\[*]} 104 eval export ${VAR}=\${new\[*]}
163} 105}
164 106
107# @FUNCTION: filter-flags
108# @USAGE: <flags>
109# @DESCRIPTION:
110# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
165filter-flags() { 111filter-flags() {
166 _filter-hardened "$@" 112 _filter-hardened "$@"
167 _filter-var CFLAGS "$@" 113 _filter-var CFLAGS "$@"
114 _filter-var CPPFLAGS "$@"
168 _filter-var CXXFLAGS "$@" 115 _filter-var CXXFLAGS "$@"
116 _filter-var FFLAGS "$@"
117 _filter-var FCFLAGS "$@"
169 return 0 118 return 0
170} 119}
171 120
121# @FUNCTION: filter-lfs-flags
122# @DESCRIPTION:
123# Remove flags that enable Large File Support.
172filter-lfs-flags() { 124filter-lfs-flags() {
173 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 125 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
174 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
175} 127}
176 128
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-fflags
140# @USAGE: <flags>
141# @DESCRIPTION:
142# Add extra <flags> to the current {F,FC}FLAGS.
143append-fflags() {
144 [[ -z $* ]] && return 0
145 export FFLAGS="${FFLAGS} $*"
146 export FCFLAGS="${FCFLAGS} $*"
147 return 0
148}
149
150# @FUNCTION: append-lfs-flags
151# @DESCRIPTION:
152# Add flags that enable Large File Support.
177append-lfs-flags() { 153append-lfs-flags() {
178 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 154 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
179 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 155 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
180} 156}
181 157
158# @FUNCTION: append-flags
159# @USAGE: <flags>
160# @DESCRIPTION:
161# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
182append-flags() { 162append-flags() {
183 [[ -z $* ]] && return 0 163 [[ -z $* ]] && return 0
184 export CFLAGS="${CFLAGS} $*" 164 export CFLAGS="${CFLAGS} $*"
185 export CXXFLAGS="${CXXFLAGS} $*" 165 export CXXFLAGS="${CXXFLAGS} $*"
166 export FFLAGS="${FFLAGS} $*"
167 export FCFLAGS="${FCFLAGS} $*"
186 return 0 168 return 0
187} 169}
188 170
171# @FUNCTION: replace-flags
172# @USAGE: <old> <new>
173# @DESCRIPTION:
174# Replace the <old> flag with <new>. Accepts shell globs for <old>.
189replace-flags() { 175replace-flags() {
190 [[ $# != 2 ]] \ 176 [[ $# != 2 ]] \
191 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 177 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
192 && die "replace-flags takes 2 arguments, not $#" 178 && die "replace-flags takes 2 arguments, not $#"
193 179
194 local f fset 180 local f fset
195 declare -a new_CFLAGS new_CXXFLAGS 181 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
196 182
197 for fset in CFLAGS CXXFLAGS; do 183 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
198 # Looping over the flags instead of using a global 184 # Looping over the flags instead of using a global
199 # substitution ensures that we're working with flag atoms. 185 # substitution ensures that we're working with flag atoms.
200 # Otherwise globs like -O* have the potential to wipe out the 186 # Otherwise globs like -O* have the potential to wipe out the
201 # list of flags. 187 # list of flags.
202 for f in ${!fset}; do 188 for f in ${!fset}; do
208 done 194 done
209 195
210 return 0 196 return 0
211} 197}
212 198
199# @FUNCTION: replace-cpu-flags
200# @USAGE: <old> <new>
201# @DESCRIPTION:
202# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
203# with flags that select the <new> cpu. Accepts shell globs for <old>.
213replace-cpu-flags() { 204replace-cpu-flags() {
214 local newcpu="$#" ; newcpu="${!newcpu}" 205 local newcpu="$#" ; newcpu="${!newcpu}"
215 while [ $# -gt 1 ] ; do 206 while [ $# -gt 1 ] ; do
216 # quote to make sure that no globbing is done (particularly on 207 # quote to make sure that no globbing is done (particularly on
217 # ${oldcpu} prior to calling replace-flags 208 # ${oldcpu}) prior to calling replace-flags
218 replace-flags "-march=${1}" "-march=${newcpu}" 209 replace-flags "-march=${1}" "-march=${newcpu}"
219 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 210 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
220 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 211 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
221 shift 212 shift
222 done 213 done
223 return 0 214 return 0
224} 215}
225 216
217_is_flagq() {
218 local x
219 for x in ${!1} ; do
220 [[ ${x} == $2 ]] && return 0
221 done
222 return 1
223}
224
225# @FUNCTION: is-flagq
226# @USAGE: <flag>
227# @DESCRIPTION:
228# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
226is-flagq() { 229is-flagq() {
227 local x 230 [[ -n $2 ]] && die "Usage: is-flag <flag>"
228 231 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
229 for x in ${CFLAGS} ${CXXFLAGS} ; do
230 # Note this should work with globs like -mcpu=ultrasparc*
231 if [[ ${x} == ${1} ]]; then
232 return 0
233 fi
234 done
235 return 1
236} 232}
237 233
234# @FUNCTION: is-flag
235# @USAGE: <flag>
236# @DESCRIPTION:
237# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
238is-flag() { 238is-flag() {
239 if is-flagq ${1}; then 239 is-flagq "$@" && echo true
240 echo true
241 return 0
242 fi
243 return 1
244} 240}
245 241
242# @FUNCTION: is-ldflagq
243# @USAGE: <flag>
244# @DESCRIPTION:
245# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
246is-ldflagq() { 246is-ldflagq() {
247 local x 247 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
248 248 _is_flagq LDFLAGS $1
249 for x in ${LDFLAGS} ; do
250 # Note this should work with globs like -mcpu=ultrasparc*
251 if [[ ${x} == ${1} ]]; then
252 return 0
253 fi
254 done
255 return 1
256} 249}
257 250
251# @FUNCTION: is-ldflag
252# @USAGE: <flag>
253# @DESCRIPTION:
254# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
258is-ldflag() { 255is-ldflag() {
259 if is-ldflagq ${1}; then 256 is-ldflagq "$@" && echo true
260 echo true
261 return 0
262 fi
263 return 1
264} 257}
265 258
259# @FUNCTION: filter-mfpmath
260# @USAGE: <math types>
261# @DESCRIPTION:
262# Remove specified math types from the fpmath flag. For example, if the user
263# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
264# -mfpmath=386.
266filter-mfpmath() { 265filter-mfpmath() {
267 local orig_mfpmath new_math prune_math 266 local orig_mfpmath new_math prune_math
268 267
269 # save the original -mfpmath flag 268 # save the original -mfpmath flag
270 orig_mfpmath="`get-flag -mfpmath`" 269 orig_mfpmath=$(get-flag -mfpmath)
271 # get the value of the current -mfpmath flag 270 # get the value of the current -mfpmath flag
272 new_math=" `get-flag mfpmath | tr , ' '` " 271 new_math=$(get-flag mfpmath)
272 new_math=" ${new_math//,/ } "
273 # figure out which math values are to be removed 273 # figure out which math values are to be removed
274 prune_math="" 274 prune_math=""
275 for prune_math in "$@" ; do 275 for prune_math in "$@" ; do
276 new_math="${new_math/ ${prune_math} / }" 276 new_math=${new_math/ ${prune_math} / }
277 done 277 done
278 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 278 new_math=$(echo ${new_math})
279 new_math=${new_math// /,}
279 280
280 if [ -z "${new_math}" ] ; then 281 if [[ -z ${new_math} ]] ; then
281 # if we're removing all user specified math values are 282 # if we're removing all user specified math values are
282 # slated for removal, then we just filter the flag 283 # slated for removal, then we just filter the flag
283 filter-flags ${orig_mfpmath} 284 filter-flags ${orig_mfpmath}
284 else 285 else
285 # if we only want to filter some of the user specified 286 # if we only want to filter some of the user specified
287 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 288 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
288 fi 289 fi
289 return 0 290 return 0
290} 291}
291 292
293# @FUNCTION: strip-flags
294# @DESCRIPTION:
295# Strip C[XX]FLAGS of everything except known good/safe flags.
292strip-flags() { 296strip-flags() {
293 local x y flag NEW_CFLAGS NEW_CXXFLAGS 297 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
294 298
295 setup-allowed-flags 299 setup-allowed-flags
296 300
297 local NEW_CFLAGS="" 301 local NEW_CFLAGS=""
298 local NEW_CXXFLAGS="" 302 local NEW_CXXFLAGS=""
303 local NEW_FFLAGS=""
304 local NEW_FCFLAGS=""
299 305
300 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 306 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
301 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 307 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
302 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 308 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
303 fi 309 fi
322 break 328 break
323 fi 329 fi
324 done 330 done
325 done 331 done
326 332
333 for x in ${FFLAGS}; do
334 for y in ${ALLOWED_FLAGS}; do
335 flag=${x%%=*}
336 if [ "${flag%%${y}}" = "" ] ; then
337 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
338 break
339 fi
340 done
341 done
342
343 for x in ${FCFLAGS}; do
344 for y in ${ALLOWED_FLAGS}; do
345 flag=${x%%=*}
346 if [ "${flag%%${y}}" = "" ] ; then
347 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
348 break
349 fi
350 done
351 done
352
327 # In case we filtered out all optimization flags fallback to -O2 353 # In case we filtered out all optimization flags fallback to -O2
328 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 354 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
329 NEW_CFLAGS="${NEW_CFLAGS} -O2" 355 NEW_CFLAGS="${NEW_CFLAGS} -O2"
330 fi 356 fi
331 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 357 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
332 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 358 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
333 fi 359 fi
360 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
361 NEW_FFLAGS="${NEW_FFLAGS} -O2"
362 fi
363 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
364 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
365 fi
334 366
335 set +f # re-enable pathname expansion 367 set +f # re-enable pathname expansion
336 368
337 export CFLAGS="${NEW_CFLAGS}" 369 export CFLAGS="${NEW_CFLAGS}"
338 export CXXFLAGS="${NEW_CXXFLAGS}" 370 export CXXFLAGS="${NEW_CXXFLAGS}"
371 export FFLAGS="${NEW_FFLAGS}"
372 export FCFLAGS="${NEW_FCFLAGS}"
339 return 0 373 return 0
340} 374}
341 375
342test-flag-PROG() { 376test-flag-PROG() {
343 local comp=$1 377 local comp=$1
349 local PROG=$(tc-get${comp}) 383 local PROG=$(tc-get${comp})
350 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 384 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
351 > /dev/null 2>&1 385 > /dev/null 2>&1
352} 386}
353 387
354# Returns true if C compiler support given flag 388# @FUNCTION: test-flag-CC
389# @USAGE: <flag>
390# @DESCRIPTION:
391# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
355test-flag-CC() { test-flag-PROG "CC" "$1"; } 392test-flag-CC() { test-flag-PROG "CC" "$1"; }
356 393
357# Returns true if C++ compiler support given flag 394# @FUNCTION: test-flag-CXX
395# @USAGE: <flag>
396# @DESCRIPTION:
397# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
358test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 398test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
399
400# @FUNCTION: test-flag-F77
401# @USAGE: <flag>
402# @DESCRIPTION:
403# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
404test-flag-F77() { test-flag-PROG "F77" "$1"; }
405
406# @FUNCTION: test-flag-FC
407# @USAGE: <flag>
408# @DESCRIPTION:
409# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
410test-flag-FC() { test-flag-PROG "FC" "$1"; }
359 411
360test-flags-PROG() { 412test-flags-PROG() {
361 local comp=$1 413 local comp=$1
362 local flags 414 local flags
363 local x 415 local x
364 416
365 shift 417 shift
366 418
367 [[ -z ${comp} ]] && \ 419 [[ -z ${comp} ]] && return 1
368 return 1
369 420
421 x=""
370 for x in "$@" ; do 422 for x in "$@" ; do
371 test-flag-${comp} "${x}" && flags="${flags} ${x}" 423 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
372 done 424 done
373 425
374 echo "${flags}" 426 echo "${flags}"
375 427
376 # Just bail if we dont have any flags 428 # Just bail if we dont have any flags
377 [[ -n ${flags} ]] 429 [[ -n ${flags} ]]
378} 430}
379 431
380# Returns (echo's) the given flags supported by the C compiler 432# @FUNCTION: test-flags-CC
433# @USAGE: <flags>
434# @DESCRIPTION:
435# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
381test-flags-CC() { test-flags-PROG "CC" "$@"; } 436test-flags-CC() { test-flags-PROG "CC" "$@"; }
382 437
383# Returns (echo's) the given flags supported by the C++ compiler 438# @FUNCTION: test-flags-CXX
439# @USAGE: <flags>
440# @DESCRIPTION:
441# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
384test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 442test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
385 443
444# @FUNCTION: test-flags-F77
445# @USAGE: <flags>
446# @DESCRIPTION:
447# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
448test-flags-F77() { test-flags-PROG "F77" "$@"; }
449
450# @FUNCTION: test-flags-FC
451# @USAGE: <flags>
452# @DESCRIPTION:
453# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
454test-flags-FC() { test-flags-PROG "FC" "$@"; }
455
456# @FUNCTION: test-flags
457# @USAGE: <flags>
458# @DESCRIPTION:
386# Short-hand that should hopefully work for both C and C++ compiler, but 459# Short-hand that should hopefully work for both C and C++ compiler, but
387# its really only present due to the append-flags() abomination. 460# its really only present due to the append-flags() abomination.
388test-flags() { test-flags-CC "$@"; } 461test-flags() { test-flags-CC "$@"; }
389 462
390# Depriciated, use test-flags() 463# @FUNCTION: test_flag
464# @DESCRIPTION:
465# DEPRICIATED, use test-flags()
391test_flag() { 466test_flag() {
392 ewarn "test_flag: deprecated, please use test-flags()!" >&2 467 ewarn "test_flag: deprecated, please use test-flags()!" >&2
393 468
394 test-flags-CC "$@" 469 test-flags-CC "$@"
395} 470}
396 471
472# @FUNCTION: test_version_info
473# @USAGE: <version>
474# @DESCRIPTION:
475# Returns shell true if the current C compiler version matches <version>, else returns shell false.
476# Accepts shell globs.
397test_version_info() { 477test_version_info() {
398 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 478 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
399 return 0 479 return 0
400 else 480 else
401 return 1 481 return 1
402 fi 482 fi
403} 483}
404 484
485# @FUNCTION: strip-unsupported-flags
486# @DESCRIPTION:
487# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
405strip-unsupported-flags() { 488strip-unsupported-flags() {
406 local x NEW_CFLAGS NEW_CXXFLAGS 489 export CFLAGS=$(test-flags-CC ${CFLAGS})
407 490 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
408 for x in ${CFLAGS} ; do 491 export FFLAGS=$(test-flags-F77 ${FFLAGS})
409 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})" 492 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
410 done
411 for x in ${CXXFLAGS} ; do
412 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
413 done
414
415 export CFLAGS=${NEW_CFLAGS}
416 export CXXFLAGS=${NEW_CXXFLAGS}
417} 493}
418 494
495# @FUNCTION: get-flag
496# @USAGE: <flag>
497# @DESCRIPTION:
498# Find and echo the value for a particular flag. Accepts shell globs.
419get-flag() { 499get-flag() {
420 local f findflag="$1" 500 local f findflag="$1"
421 501
422 # this code looks a little flaky but seems to work for 502 # this code looks a little flaky but seems to work for
423 # everything we want ... 503 # everything we want ...
424 # for example, if CFLAGS="-march=i686": 504 # for example, if CFLAGS="-march=i686":
425 # `get-flag -march` == "-march=i686" 505 # `get-flag -march` == "-march=i686"
426 # `get-flag march` == "i686" 506 # `get-flag march` == "i686"
427 for f in ${CFLAGS} ${CXXFLAGS} ; do 507 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
428 if [ "${f/${findflag}}" != "${f}" ] ; then 508 if [ "${f/${findflag}}" != "${f}" ] ; then
429 printf "%s\n" "${f/-${findflag}=}" 509 printf "%s\n" "${f/-${findflag}=}"
430 return 0 510 return 0
431 fi 511 fi
432 done 512 done
433 return 1 513 return 1
434} 514}
435 515
516# @FUNCTION: has_hardened
517# @DESCRIPTION:
436# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 518# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
437has_hardened() { 519has_hardened() {
438 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 520 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
439 521
440 test_version_info Hardened && return 0 522 test_version_info Hardened && return 0
441 # The specs file wont exist unless gcc has GCC_SPECS support 523 # The specs file wont exist unless gcc has GCC_SPECS support
442 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 524 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
443} 525}
444 526
527# @FUNCTION: has_pic
528# @DESCRIPTION:
445# DEPRECATED - use gcc-specs-pie from toolchain-funcs 529# DEPRECATED - use gcc-specs-pie from toolchain-funcs
446# indicate whether PIC is set 530# indicate whether PIC is set
447has_pic() { 531has_pic() {
448 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 532 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
449 533
450 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 534 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
451 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \ 535 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
452 gcc-specs-pie 536 gcc-specs-pie
453} 537}
454 538
539# @FUNCTION: has_pie
540# @DESCRIPTION:
455# DEPRECATED - use gcc-specs-pie from toolchain-funcs 541# DEPRECATED - use gcc-specs-pie from toolchain-funcs
456# indicate whether PIE is set 542# indicate whether PIE is set
457has_pie() { 543has_pie() {
458 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 544 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
459 545
460 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 546 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
461 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \ 547 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
462 gcc-specs-pie 548 gcc-specs-pie
463} 549}
464 550
551# @FUNCTION: has_ssp_all
552# @DESCRIPTION:
465# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 553# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
466# indicate whether code for SSP is being generated for all functions 554# indicate whether code for SSP is being generated for all functions
467has_ssp_all() { 555has_ssp_all() {
468 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 556 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
469 557
470 # note; this matches only -fstack-protector-all 558 # note; this matches only -fstack-protector-all
471 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 559 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
472 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 560 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
473 gcc-specs-ssp-all 561 gcc-specs-ssp-to-all
474} 562}
475 563
564# @FUNCTION: has_ssp
565# @DESCRIPTION:
476# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 566# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
477# indicate whether code for SSP is being generated 567# indicate whether code for SSP is being generated
478has_ssp() { 568has_ssp() {
479 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 569 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
480 570
482 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 572 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
483 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 573 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
484 gcc-specs-ssp 574 gcc-specs-ssp
485} 575}
486 576
577# @FUNCTION: has_m64
578# @DESCRIPTION:
579# This doesn't test if the flag is accepted, it tests if the flag actually
580# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
581# return code is 0, else the return code is 1.
487has_m64() { 582has_m64() {
488 # this doesnt test if the flag is accepted, it tests if the flag 583 # this doesnt test if the flag is accepted, it tests if the flag
489 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 584 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
490 # please dont replace this function with test_flag in some future 585 # please dont replace this function with test_flag in some future
491 # clean-up! 586 # clean-up!
498 rm -f "${temp}".c 593 rm -f "${temp}".c
499 [[ ${ret} != 1 ]] && return 0 594 [[ ${ret} != 1 ]] && return 0
500 return 1 595 return 1
501} 596}
502 597
598# @FUNCTION: has_m32
599# @DESCRIPTION:
600# This doesn't test if the flag is accepted, it tests if the flag actually
601# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
602# code is 0, else return code is 1.
503has_m32() { 603has_m32() {
504 # this doesnt test if the flag is accepted, it tests if the flag 604 # this doesnt test if the flag is accepted, it tests if the flag
505 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 605 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
506 # please dont replace this function with test_flag in some future 606 # please dont replace this function with test_flag in some future
507 # clean-up! 607 # clean-up!
516 rm -f "${temp}".c 616 rm -f "${temp}".c
517 [[ ${ret} != 1 ]] && return 0 617 [[ ${ret} != 1 ]] && return 0
518 return 1 618 return 1
519} 619}
520 620
621# @FUNCTION: replace-sparc64-flags
622# @DESCRIPTION:
623# Sets mcpu to v8 and uses the original value as mtune if none specified.
521replace-sparc64-flags() { 624replace-sparc64-flags() {
522 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 625 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
523 626
524 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 627 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
525 for x in ${SPARC64_CPUS}; do 628 for x in ${SPARC64_CPUS}; do
526 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 629 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
527 done 630 done
528 else 631 else
529 for x in ${SPARC64_CPUS}; do 632 for x in ${SPARC64_CPUS}; do
530 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 633 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
531 done 634 done
532 fi 635 fi
533 636
534 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 637 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
535 for x in ${SPARC64_CPUS}; do 638 for x in ${SPARC64_CPUS}; do
536 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 639 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
537 done 640 done
538 else 641 else
539 for x in ${SPARC64_CPUS}; do 642 for x in ${SPARC64_CPUS}; do
540 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 643 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
541 done 644 done
542 fi 645 fi
543 646
544 export CFLAGS CXXFLAGS 647 export CFLAGS CXXFLAGS
545} 648}
546 649
650# @FUNCTION: append-ldflags
651# @USAGE: <flags>
652# @DESCRIPTION:
653# Add extra <flags> to the current LDFLAGS.
547append-ldflags() { 654append-ldflags() {
548 [[ -z $* ]] && return 0 655 [[ -z $* ]] && return 0
656 local flag
657 for flag in "$@"; do
658 [[ ${flag} == -l* ]] && \
659 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
660 done
661
549 export LDFLAGS="${LDFLAGS} $*" 662 export LDFLAGS="${LDFLAGS} $*"
550 return 0 663 return 0
551} 664}
552 665
553# Remove flags from LDFLAGS - it's up to the ebuild to filter 666# @FUNCTION: filter-ldflags
554# CFLAGS and CXXFLAGS via filter-flags if they need to. 667# @USAGE: <flags>
668# @DESCRIPTION:
669# Remove particular <flags> from LDFLAGS. Accepts shell globs.
555filter-ldflags() { 670filter-ldflags() {
556 _filter-var LDFLAGS "$@" 671 _filter-var LDFLAGS "$@"
557 return 0 672 return 0
558} 673}
559 674
675# @FUNCTION: raw-ldflags
676# @USAGE: <flags>
677# @DESCRIPTION:
560# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 678# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
561# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 679# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
562# to gcc where it needs the '-Wl,'. 680# to gcc where it needs the '-Wl,'.
563raw-ldflags() { 681raw-ldflags() {
564 local x input="$@" 682 local x input="$@"
569 set -- "$@" ${x//,/ } 687 set -- "$@" ${x//,/ }
570 done 688 done
571 echo "$@" 689 echo "$@"
572} 690}
573 691
574# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 692# @FUNCTION: bindnow-flags
575# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 693# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
576# fixes. 694# @DESCRIPTION:
695# DEPRECATED - Gets the flags needed for "NOW" binding
696bindnow-flags() {
697 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild"
698}
699
700
701# Some tests for when we screw with things and want to make
702# sure we didn't break anything
703#TESTS() {
704# CFLAGS="-a -b -c=1"
705# CXXFLAGS="-x -y -z=2"
706# LDFLAGS="-l -m -n=3"
577# 707#
578# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 708# die() { exit 1; }
579gcc2-flags() { 709# (is-flag 1 2 3) && die
580 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then 710# (is-ldflag 1 2 3) && die
581 CFLAGS=${CFLAGS//-mtune=/-mcpu=} 711#
582 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=} 712# is-flagq -l && die
583 fi 713# is-ldflagq -a && die
584 714# is-flagq -a || die
585 replace-cpu-flags k6-{2,3} k6 715# is-flagq -x || die
586 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686 716# is-ldflagq -n=* || die
587 717# is-ldflagq -n && die
588 replace-cpu-flags pentium-mmx i586 718#
589 replace-cpu-flags pentium{2,3,4} i686 719# strip-unsupported-flags
590 720# [[ ${CFLAGS} == "-c=1" ]] || die
591 replace-cpu-flags ev6{7,8} ev6 721# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
592 722#
593 export CFLAGS CXXFLAGS 723# echo "All tests pass"
594} 724#}
595 725#TESTS
596# Gets the flags needed for "NOW" binding
597bindnow-flags() {
598 case $($(tc-getLD) -v 2>&1 </dev/null) in
599 *GNU* | *'with BFD'*) # GNU ld
600 echo "-Wl,-z,now" ;;
601 *Apple*) # Darwin ld
602 echo "-bind_at_load" ;;
603 *)
604 # Some linkers just recognize -V instead of -v
605 case $($(tc-getLD) -V 2>&1 </dev/null) in
606 *Solaris*) # Solaris accept almost the same GNU options
607 echo "-Wl,-z,now" ;;
608 esac
609 ;;
610 esac
611}

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