/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.119 Revision 1.164
1# Copyright 1999-2007 Gentoo Foundation 1# Copyright 1999-2011 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.119 2007/05/12 11:45:51 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.164 2012/01/13 22:40:29 vapier Exp $
4# 4
5# @ECLASS: flag-o-matic.eclass
6# @MAINTAINER:
5# Maintainer: toolchain@gentoo.org 7# toolchain@gentoo.org
8# @BLURB: common functions to manipulate and query toolchain flags
9# @DESCRIPTION:
10# This eclass contains a suite of functions to help developers sanely
11# and safely manage toolchain flags in their builds.
6 12
7# need access to emktemp() 13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15
8inherit eutils toolchain-funcs multilib 16inherit eutils toolchain-funcs multilib
9 17
10#
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 ################ 18################ DEPRECATED functions ################
66# The following are still present to avoid breaking existing 19# The following are still present to avoid breaking existing
67# code more than necessary; however they are deprecated. Please 20# code more than necessary; however they are deprecated. Please
68# use gcc-specs-* from toolchain-funcs.eclass instead, if you 21# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# need to know which hardened techs are active in the compiler. 22# need to know which hardened techs are active in the compiler.
70# See bug #100974 23# See bug #100974
71# 24#
72#### has_hardened #### 25# has_hardened
73# Returns true if the compiler has 'Hardened' in its version string, 26# has_pie
74# (note; switched-spec vanilla compilers satisfy this condition) or 27# 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 #### 28# has_ssp_all
86# Returns true if the compiler by default or with current CFLAGS 29# 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 30
31
94# C[XX]FLAGS that we allow in strip-flags 32# {C,CXX,F,FC}FLAGS that we allow in strip-flags
95# Note: shell globs and character lists are allowed 33# Note: shell globs and character lists are allowed
96setup-allowed-flags() { 34setup-allowed-flags() {
97 if [[ -z ${ALLOWED_FLAGS} ]] ; then
98 export ALLOWED_FLAGS="-pipe" 35 ALLOWED_FLAGS="-pipe"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 36 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 37 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking" 38 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 39 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+" 40 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
104 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 41 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
105 fi 42 ALLOWED_FLAGS+=" -W* -w"
43
106 # allow a bunch of flags that negate features / control ABI 44 # allow a bunch of flags that negate features / control ABI
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \ 45 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
108 -fno-strict-aliasing -fno-bounds-checking" 46 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
47 -fno-omit-frame-pointer"
109 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 48 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
110 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 49 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
50 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
111 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 51 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
112 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 52 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
113 -mieee -mieee-with-inexact -mschedule \ 53 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
114 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 54 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
115 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 55 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
116 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 56 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
117 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 57 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
118 -msecure-plt -D*"
119 58
120 # C[XX]FLAGS that we are think is ok, but needs testing 59 # 4.5
121 # NOTE: currently -Os have issues with gcc3 and K6* arch's 60 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
122 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 61 # 4.6
62 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
63
64 export ALLOWED_FLAGS
123 return 0 65 return 0
124} 66}
125 67
126# inverted filters for hardened compiler. This is trying to unpick 68# inverted filters for hardened compiler. This is trying to unpick
127# the hardened compiler defaults. 69# the hardened compiler defaults.
135 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 77 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
136 gcc-specs-pie || continue 78 gcc-specs-pie || continue
137 is-flagq -nopie || append-flags -nopie;; 79 is-flagq -nopie || append-flags -nopie;;
138 -fstack-protector) 80 -fstack-protector)
139 gcc-specs-ssp || continue 81 gcc-specs-ssp || continue
140 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 82 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
141 -fstack-protector-all) 83 -fstack-protector-all)
142 gcc-specs-ssp-to-all || continue 84 gcc-specs-ssp-to-all || continue
143 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 85 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
86 -fno-strict-overflow)
87 gcc-specs-nostrict || continue
88 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
144 esac 89 esac
145 done 90 done
146} 91}
147 92
148# Remove occurrences of strings from variable given in $1 93# Remove occurrences of strings from variable given in $1
163 eval new\[\${\#new\[@]}]=\${f} 108 eval new\[\${\#new\[@]}]=\${f}
164 done 109 done
165 eval export ${VAR}=\${new\[*]} 110 eval export ${VAR}=\${new\[*]}
166} 111}
167 112
113# @FUNCTION: filter-flags
114# @USAGE: <flags>
115# @DESCRIPTION:
116# Remove particular <flags> from {C,CPP,CXX,F,FC,LD}FLAGS. Accepts shell globs.
168filter-flags() { 117filter-flags() {
169 _filter-hardened "$@" 118 _filter-hardened "$@"
119 local v
120 for v in C CPP CXX F FC LD ; do
170 _filter-var CFLAGS "$@" 121 _filter-var ${v}FLAGS "$@"
171 _filter-var CPPFLAGS "$@" 122 done
172 _filter-var CXXFLAGS "$@"
173 return 0 123 return 0
174} 124}
175 125
126# @FUNCTION: filter-lfs-flags
127# @DESCRIPTION:
128# Remove flags that enable Large File Support.
176filter-lfs-flags() { 129filter-lfs-flags() {
177 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 130 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
131 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
132 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
133 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
134 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
178 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 135 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
179} 136}
180 137
138# @FUNCTION: append-cppflags
139# @USAGE: <flags>
140# @DESCRIPTION:
141# Add extra <flags> to the current CPPFLAGS.
181append-cppflags() { 142append-cppflags() {
182 [[ -z $* ]] && return 0 143 [[ $# -eq 0 ]] && return 0
183 export CPPFLAGS="${CPPFLAGS} $*" 144 export CPPFLAGS="${CPPFLAGS} $*"
184 return 0 145 return 0
185} 146}
186 147
148# @FUNCTION: append-cflags
149# @USAGE: <flags>
150# @DESCRIPTION:
151# Add extra <flags> to the current CFLAGS.
152append-cflags() {
153 [[ $# -eq 0 ]] && return 0
154 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
155 return 0
156}
157
158# @FUNCTION: append-cxxflags
159# @USAGE: <flags>
160# @DESCRIPTION:
161# Add extra <flags> to the current CXXFLAGS.
162append-cxxflags() {
163 [[ $# -eq 0 ]] && return 0
164 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
165 return 0
166}
167
168# @FUNCTION: append-fflags
169# @USAGE: <flags>
170# @DESCRIPTION:
171# Add extra <flags> to the current {F,FC}FLAGS.
172append-fflags() {
173 [[ $# -eq 0 ]] && return 0
174 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
175 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
176 return 0
177}
178
179# @FUNCTION: append-lfs-flags
180# @DESCRIPTION:
181# Add flags that enable Large File Support.
187append-lfs-flags() { 182append-lfs-flags() {
188 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 183 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
184 # see comments in filter-lfs-flags func for meaning of these
189 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 185 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
190} 186}
191 187
188# @FUNCTION: append-flags
189# @USAGE: <flags>
190# @DESCRIPTION:
191# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
192append-flags() { 192append-flags() {
193 [[ -z $* ]] && return 0 193 [[ $# -eq 0 ]] && return 0
194 export CFLAGS="${CFLAGS} $*" 194 append-cflags "$@"
195 export CXXFLAGS="${CXXFLAGS} $*" 195 append-cxxflags "$@"
196 append-fflags "$@"
196 return 0 197 return 0
197} 198}
198 199
200# @FUNCTION: replace-flags
201# @USAGE: <old> <new>
202# @DESCRIPTION:
203# Replace the <old> flag with <new>. Accepts shell globs for <old>.
199replace-flags() { 204replace-flags() {
200 [[ $# != 2 ]] \ 205 [[ $# != 2 ]] \
201 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 206 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
202 && die "replace-flags takes 2 arguments, not $#" 207 && die "replace-flags takes 2 arguments, not $#"
203 208
204 local f fset 209 local f fset
205 declare -a new_CFLAGS new_CXXFLAGS 210 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
206 211
207 for fset in CFLAGS CXXFLAGS; do 212 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
208 # Looping over the flags instead of using a global 213 # Looping over the flags instead of using a global
209 # substitution ensures that we're working with flag atoms. 214 # substitution ensures that we're working with flag atoms.
210 # Otherwise globs like -O* have the potential to wipe out the 215 # Otherwise globs like -O* have the potential to wipe out the
211 # list of flags. 216 # list of flags.
212 for f in ${!fset}; do 217 for f in ${!fset}; do
218 done 223 done
219 224
220 return 0 225 return 0
221} 226}
222 227
228# @FUNCTION: replace-cpu-flags
229# @USAGE: <old> <new>
230# @DESCRIPTION:
231# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
232# with flags that select the <new> cpu. Accepts shell globs for <old>.
223replace-cpu-flags() { 233replace-cpu-flags() {
224 local newcpu="$#" ; newcpu="${!newcpu}" 234 local newcpu="$#" ; newcpu="${!newcpu}"
225 while [ $# -gt 1 ] ; do 235 while [ $# -gt 1 ] ; do
226 # quote to make sure that no globbing is done (particularly on 236 # quote to make sure that no globbing is done (particularly on
227 # ${oldcpu}) prior to calling replace-flags 237 # ${oldcpu}) prior to calling replace-flags
239 [[ ${x} == $2 ]] && return 0 249 [[ ${x} == $2 ]] && return 0
240 done 250 done
241 return 1 251 return 1
242} 252}
243 253
254# @FUNCTION: is-flagq
255# @USAGE: <flag>
256# @DESCRIPTION:
257# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
244is-flagq() { 258is-flagq() {
245 [[ -n $2 ]] && die "Usage: is-flag <flag>" 259 [[ -n $2 ]] && die "Usage: is-flag <flag>"
246 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 260 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
247} 261}
248 262
263# @FUNCTION: is-flag
264# @USAGE: <flag>
265# @DESCRIPTION:
266# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
249is-flag() { 267is-flag() {
250 is-flagq "$@" && echo true 268 is-flagq "$@" && echo true
251} 269}
252 270
271# @FUNCTION: is-ldflagq
272# @USAGE: <flag>
273# @DESCRIPTION:
274# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
253is-ldflagq() { 275is-ldflagq() {
254 [[ -n $2 ]] && die "Usage: is-ldflag <flag>" 276 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
255 _is_flagq LDFLAGS $1 277 _is_flagq LDFLAGS $1
256} 278}
257 279
280# @FUNCTION: is-ldflag
281# @USAGE: <flag>
282# @DESCRIPTION:
283# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
258is-ldflag() { 284is-ldflag() {
259 is-ldflagq "$@" && echo true 285 is-ldflagq "$@" && echo true
260} 286}
261 287
288# @FUNCTION: filter-mfpmath
289# @USAGE: <math types>
290# @DESCRIPTION:
291# Remove specified math types from the fpmath flag. For example, if the user
292# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
293# -mfpmath=386.
262filter-mfpmath() { 294filter-mfpmath() {
263 local orig_mfpmath new_math prune_math 295 local orig_mfpmath new_math prune_math
264 296
265 # save the original -mfpmath flag 297 # save the original -mfpmath flag
266 orig_mfpmath=$(get-flag -mfpmath) 298 orig_mfpmath=$(get-flag -mfpmath)
285 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 317 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
286 fi 318 fi
287 return 0 319 return 0
288} 320}
289 321
322# @FUNCTION: strip-flags
323# @DESCRIPTION:
324# Strip C[XX]FLAGS of everything except known good/safe flags.
290strip-flags() { 325strip-flags() {
291 local x y flag NEW_CFLAGS NEW_CXXFLAGS 326 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
292 327
293 setup-allowed-flags 328 setup-allowed-flags
294 329
295 local NEW_CFLAGS="" 330 local NEW_CFLAGS=""
296 local NEW_CXXFLAGS="" 331 local NEW_CXXFLAGS=""
297 332 local NEW_FFLAGS=""
298 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 333 local NEW_FCFLAGS=""
299 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
300 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
301 fi
302 334
303 set -f # disable pathname expansion 335 set -f # disable pathname expansion
304 336
305 for x in ${CFLAGS}; do 337 for x in ${CFLAGS}; do
306 for y in ${ALLOWED_FLAGS}; do 338 for y in ${ALLOWED_FLAGS}; do
320 break 352 break
321 fi 353 fi
322 done 354 done
323 done 355 done
324 356
357 for x in ${FFLAGS}; do
358 for y in ${ALLOWED_FLAGS}; do
359 flag=${x%%=*}
360 if [ "${flag%%${y}}" = "" ] ; then
361 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
362 break
363 fi
364 done
365 done
366
367 for x in ${FCFLAGS}; do
368 for y in ${ALLOWED_FLAGS}; do
369 flag=${x%%=*}
370 if [ "${flag%%${y}}" = "" ] ; then
371 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
372 break
373 fi
374 done
375 done
376
325 # In case we filtered out all optimization flags fallback to -O2 377 # In case we filtered out all optimization flags fallback to -O2
326 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 378 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
327 NEW_CFLAGS="${NEW_CFLAGS} -O2" 379 NEW_CFLAGS="${NEW_CFLAGS} -O2"
328 fi 380 fi
329 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 381 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
330 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 382 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
331 fi 383 fi
384 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
385 NEW_FFLAGS="${NEW_FFLAGS} -O2"
386 fi
387 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
388 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
389 fi
332 390
333 set +f # re-enable pathname expansion 391 set +f # re-enable pathname expansion
334 392
335 export CFLAGS="${NEW_CFLAGS}" 393 export CFLAGS="${NEW_CFLAGS}"
336 export CXXFLAGS="${NEW_CXXFLAGS}" 394 export CXXFLAGS="${NEW_CXXFLAGS}"
395 export FFLAGS="${NEW_FFLAGS}"
396 export FCFLAGS="${NEW_FCFLAGS}"
337 return 0 397 return 0
338} 398}
339 399
340test-flag-PROG() { 400test-flag-PROG() {
341 local comp=$1 401 local comp=$1
342 local flags="$2" 402 local flags="$2"
343 403
344 [[ -z ${comp} || -z ${flags} ]] && \ 404 [[ -z ${comp} || -z ${flags} ]] && return 1
345 return 1
346 405
406 # use -c so we can test the assembler as well
347 local PROG=$(tc-get${comp}) 407 local PROG=$(tc-get${comp})
348 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 408 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
349 > /dev/null 2>&1 409 > /dev/null 2>&1
350} 410}
351 411
352# Returns true if C compiler support given flag 412# @FUNCTION: test-flag-CC
413# @USAGE: <flag>
414# @DESCRIPTION:
415# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
353test-flag-CC() { test-flag-PROG "CC" "$1"; } 416test-flag-CC() { test-flag-PROG "CC" "$1"; }
354 417
355# Returns true if C++ compiler support given flag 418# @FUNCTION: test-flag-CXX
419# @USAGE: <flag>
420# @DESCRIPTION:
421# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
356test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 422test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
423
424# @FUNCTION: test-flag-F77
425# @USAGE: <flag>
426# @DESCRIPTION:
427# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
428test-flag-F77() { test-flag-PROG "F77" "$1"; }
429
430# @FUNCTION: test-flag-FC
431# @USAGE: <flag>
432# @DESCRIPTION:
433# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
434test-flag-FC() { test-flag-PROG "FC" "$1"; }
357 435
358test-flags-PROG() { 436test-flags-PROG() {
359 local comp=$1 437 local comp=$1
360 local flags 438 local flags
361 local x 439 local x
362 440
363 shift 441 shift
364 442
365 [[ -z ${comp} ]] && return 1 443 [[ -z ${comp} ]] && return 1
366 444
367 x=""
368 for x in "$@" ; do 445 for x in "$@" ; do
369 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 446 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
370 done 447 done
371 448
372 echo "${flags}" 449 echo "${flags}"
373 450
374 # Just bail if we dont have any flags 451 # Just bail if we dont have any flags
375 [[ -n ${flags} ]] 452 [[ -n ${flags} ]]
376} 453}
377 454
378# Returns (echo's) the given flags supported by the C compiler 455# @FUNCTION: test-flags-CC
456# @USAGE: <flags>
457# @DESCRIPTION:
458# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
379test-flags-CC() { test-flags-PROG "CC" "$@"; } 459test-flags-CC() { test-flags-PROG "CC" "$@"; }
380 460
381# Returns (echo's) the given flags supported by the C++ compiler 461# @FUNCTION: test-flags-CXX
462# @USAGE: <flags>
463# @DESCRIPTION:
464# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
382test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 465test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
383 466
467# @FUNCTION: test-flags-F77
468# @USAGE: <flags>
469# @DESCRIPTION:
470# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
471test-flags-F77() { test-flags-PROG "F77" "$@"; }
472
473# @FUNCTION: test-flags-FC
474# @USAGE: <flags>
475# @DESCRIPTION:
476# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
477test-flags-FC() { test-flags-PROG "FC" "$@"; }
478
479# @FUNCTION: test-flags
480# @USAGE: <flags>
481# @DESCRIPTION:
384# Short-hand that should hopefully work for both C and C++ compiler, but 482# Short-hand that should hopefully work for both C and C++ compiler, but
385# its really only present due to the append-flags() abomination. 483# its really only present due to the append-flags() abomination.
386test-flags() { test-flags-CC "$@"; } 484test-flags() { test-flags-CC "$@"; }
387 485
388# Depriciated, use test-flags() 486# @FUNCTION: test_version_info
389test_flag() { 487# @USAGE: <version>
390 ewarn "test_flag: deprecated, please use test-flags()!" >&2 488# @DESCRIPTION:
391 489# Returns shell true if the current C compiler version matches <version>, else returns shell false.
392 test-flags-CC "$@" 490# Accepts shell globs.
393}
394
395test_version_info() { 491test_version_info() {
396 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 492 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
397 return 0 493 return 0
398 else 494 else
399 return 1 495 return 1
400 fi 496 fi
401} 497}
402 498
499# @FUNCTION: strip-unsupported-flags
500# @DESCRIPTION:
501# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
403strip-unsupported-flags() { 502strip-unsupported-flags() {
404 export CFLAGS=$(test-flags-CC ${CFLAGS}) 503 export CFLAGS=$(test-flags-CC ${CFLAGS})
405 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) 504 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
505 export FFLAGS=$(test-flags-F77 ${FFLAGS})
506 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
406} 507}
407 508
509# @FUNCTION: get-flag
510# @USAGE: <flag>
511# @DESCRIPTION:
512# Find and echo the value for a particular flag. Accepts shell globs.
408get-flag() { 513get-flag() {
409 local f findflag="$1" 514 local f findflag="$1"
410 515
411 # this code looks a little flaky but seems to work for 516 # this code looks a little flaky but seems to work for
412 # everything we want ... 517 # everything we want ...
413 # for example, if CFLAGS="-march=i686": 518 # for example, if CFLAGS="-march=i686":
414 # `get-flag -march` == "-march=i686" 519 # `get-flag -march` == "-march=i686"
415 # `get-flag march` == "i686" 520 # `get-flag march` == "i686"
416 for f in ${CFLAGS} ${CXXFLAGS} ; do 521 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
417 if [ "${f/${findflag}}" != "${f}" ] ; then 522 if [ "${f/${findflag}}" != "${f}" ] ; then
418 printf "%s\n" "${f/-${findflag}=}" 523 printf "%s\n" "${f/-${findflag}=}"
419 return 0 524 return 0
420 fi 525 fi
421 done 526 done
422 return 1 527 return 1
423} 528}
424 529
425# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 530# DEAD FUNCS. Remove by Dec 2011.
426has_hardened() { 531test_flag() { die "$0: deprecated, please use test-flags()!" ; }
427 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 532has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
428
429 test_version_info Hardened && return 0
430 # The specs file wont exist unless gcc has GCC_SPECS support
431 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
432}
433
434# DEPRECATED - use gcc-specs-pie from toolchain-funcs
435# indicate whether PIC is set
436has_pic() {
437 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 533has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
438
439 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
440 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
441 gcc-specs-pie
442}
443
444# DEPRECATED - use gcc-specs-pie from toolchain-funcs
445# indicate whether PIE is set
446has_pie() {
447 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 534has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
448
449 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
450 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
451 gcc-specs-pie
452}
453
454# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
455# indicate whether code for SSP is being generated for all functions
456has_ssp_all() {
457 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 535has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
458
459 # note; this matches only -fstack-protector-all
460 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
461 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
462 gcc-specs-ssp-all
463}
464
465# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
466# indicate whether code for SSP is being generated
467has_ssp() {
468 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 536has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
469 537
470 # note; this matches both -fstack-protector and -fstack-protector-all 538# @FUNCTION: has_m64
471 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 539# @DESCRIPTION:
472 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 540# This doesn't test if the flag is accepted, it tests if the flag actually
473 gcc-specs-ssp 541# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
474} 542# return code is 0, else the return code is 1.
475
476has_m64() { 543has_m64() {
477 # this doesnt test if the flag is accepted, it tests if the flag 544 # this doesnt test if the flag is accepted, it tests if the flag
478 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 545 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
479 # please dont replace this function with test_flag in some future 546 # please dont replace this function with test_flag in some future
480 # clean-up! 547 # clean-up!
487 rm -f "${temp}".c 554 rm -f "${temp}".c
488 [[ ${ret} != 1 ]] && return 0 555 [[ ${ret} != 1 ]] && return 0
489 return 1 556 return 1
490} 557}
491 558
559# @FUNCTION: has_m32
560# @DESCRIPTION:
561# This doesn't test if the flag is accepted, it tests if the flag actually
562# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
563# code is 0, else return code is 1.
492has_m32() { 564has_m32() {
493 # this doesnt test if the flag is accepted, it tests if the flag 565 # this doesnt test if the flag is accepted, it tests if the flag
494 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 566 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
495 # please dont replace this function with test_flag in some future 567 # please dont replace this function with test_flag in some future
496 # clean-up! 568 # clean-up!
505 rm -f "${temp}".c 577 rm -f "${temp}".c
506 [[ ${ret} != 1 ]] && return 0 578 [[ ${ret} != 1 ]] && return 0
507 return 1 579 return 1
508} 580}
509 581
582# @FUNCTION: replace-sparc64-flags
583# @DESCRIPTION:
584# Sets mcpu to v8 and uses the original value as mtune if none specified.
510replace-sparc64-flags() { 585replace-sparc64-flags() {
511 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 586 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
512 587
513 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 588 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
514 for x in ${SPARC64_CPUS}; do 589 for x in ${SPARC64_CPUS}; do
531 fi 606 fi
532 607
533 export CFLAGS CXXFLAGS 608 export CFLAGS CXXFLAGS
534} 609}
535 610
611# @FUNCTION: append-libs
612# @USAGE: <libs>
613# @DESCRIPTION:
614# Add extra <libs> to the current LIBS.
615append-libs() {
616 [[ $# -eq 0 ]] && return 0
617 local flag
618 for flag in "$@"; do
619 [[ ${flag} == -l* ]] && flag=${flag#-l}
620 export LIBS="${LIBS} -l${flag}"
621 done
622
623 return 0
624}
625
626# @FUNCTION: append-ldflags
627# @USAGE: <flags>
628# @DESCRIPTION:
629# Add extra <flags> to the current LDFLAGS.
536append-ldflags() { 630append-ldflags() {
537 [[ -z $* ]] && return 0 631 [[ $# -eq 0 ]] && return 0
632 local flag
633 for flag in "$@"; do
634 [[ ${flag} == -l* ]] && \
635 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
636 done
637
538 export LDFLAGS="${LDFLAGS} $*" 638 export LDFLAGS="${LDFLAGS} $*"
539 return 0 639 return 0
540} 640}
541 641
542# Remove flags from LDFLAGS - it's up to the ebuild to filter 642# @FUNCTION: filter-ldflags
543# CFLAGS and CXXFLAGS via filter-flags if they need to. 643# @USAGE: <flags>
644# @DESCRIPTION:
645# Remove particular <flags> from LDFLAGS. Accepts shell globs.
544filter-ldflags() { 646filter-ldflags() {
545 _filter-var LDFLAGS "$@" 647 _filter-var LDFLAGS "$@"
546 return 0 648 return 0
547} 649}
548 650
651# @FUNCTION: raw-ldflags
652# @USAGE: [flags]
653# @DESCRIPTION:
549# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 654# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
550# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 655# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
551# to gcc where it needs the '-Wl,'. 656# to gcc where it needs the '-Wl,'.
657#
658# If no flags are specified, then default to ${LDFLAGS}.
552raw-ldflags() { 659raw-ldflags() {
553 local x input="$@" 660 local x input="$@"
554 [[ -z ${input} ]] && input=${LDFLAGS} 661 [[ -z ${input} ]] && input=${LDFLAGS}
555 set -- 662 set --
556 for x in ${input} ; do 663 for x in ${input} ; do
558 set -- "$@" ${x//,/ } 665 set -- "$@" ${x//,/ }
559 done 666 done
560 echo "$@" 667 echo "$@"
561} 668}
562 669
563# Gets the flags needed for "NOW" binding 670# @FUNCTION: no-as-needed
564bindnow-flags() { 671# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
672no-as-needed() {
565 case $($(tc-getLD) -v 2>&1 </dev/null) in 673 case $($(tc-getLD) -v 2>&1 </dev/null) in
566 *GNU* | *'with BFD'*) # GNU ld 674 *GNU*) # GNU ld
567 echo "-Wl,-z,now" ;; 675 echo "-Wl,--no-as-needed" ;;
568 *Apple*) # Darwin ld
569 echo "-bind_at_load" ;;
570 *)
571 # Some linkers just recognize -V instead of -v
572 case $($(tc-getLD) -V 2>&1 </dev/null) in
573 *Solaris*) # Solaris accept almost the same GNU options
574 echo "-Wl,-z,now" ;;
575 esac
576 ;;
577 esac 676 esac
578} 677}
579 678
580 679fi
581# Some tests for when we screw with things and want to make
582# sure we didn't break anything
583#TESTS() {
584# CFLAGS="-a -b -c=1"
585# CXXFLAGS="-x -y -z=2"
586# LDFLAGS="-l -m -n=3"
587#
588# die() { exit 1; }
589# (is-flag 1 2 3) && die
590# (is-ldflag 1 2 3) && die
591#
592# is-flagq -l && die
593# is-ldflagq -a && die
594# is-flagq -a || die
595# is-flagq -x || die
596# is-ldflagq -n=* || die
597# is-ldflagq -n && die
598#
599# strip-unsupported-flags
600# [[ ${CFLAGS} == "-c=1" ]] || die
601# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
602#
603# echo "All tests pass"
604#}
605#TESTS

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