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1# Copyright 1999-2007 Gentoo Foundation 1# Copyright 1999-2011 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.119 2007/05/12 11:45:51 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.157 2011/11/11 07:06:25 dirtyepic 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()
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
95# Note: shell globs and character lists are allowed 30# Note: shell globs and character lists are allowed
96setup-allowed-flags() { 31setup-allowed-flags() {
97 if [[ -z ${ALLOWED_FLAGS} ]] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
98 export ALLOWED_FLAGS="-pipe" 33 export ALLOWED_FLAGS="-pipe"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking" 36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+" 38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
104 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
105 fi 41 fi
106 # allow a bunch of flags that negate features / control ABI 42 # allow a bunch of flags that negate features / control ABI
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \ 43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
108 -fno-strict-aliasing -fno-bounds-checking" 44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
109 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
110 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
47 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
48 -mno-popcnt -mno-abm \
111 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
112 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
113 -mieee -mieee-with-inexact -mschedule \ 51 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
114 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
115 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
116 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 54 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
117 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
118 -msecure-plt -D*" 56 -msecure-plt -m*-toc -D* -U*"
119 57
58 # 4.5
59 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60 # 4.6
61 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
62 -mno-bmi -mno-tbm"
63
120 # C[XX]FLAGS that we are think is ok, but needs testing 64 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
121 # NOTE: currently -Os have issues with gcc3 and K6* arch's 65 # NOTE: currently -Os have issues with gcc3 and K6* arch's
122 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 66 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
123 return 0 67 return 0
124} 68}
125 69
135 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 79 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
136 gcc-specs-pie || continue 80 gcc-specs-pie || continue
137 is-flagq -nopie || append-flags -nopie;; 81 is-flagq -nopie || append-flags -nopie;;
138 -fstack-protector) 82 -fstack-protector)
139 gcc-specs-ssp || continue 83 gcc-specs-ssp || continue
140 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 84 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
141 -fstack-protector-all) 85 -fstack-protector-all)
142 gcc-specs-ssp-to-all || continue 86 gcc-specs-ssp-to-all || continue
143 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 87 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
88 -fno-strict-overflow)
89 gcc-specs-nostrict || continue
90 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
144 esac 91 esac
145 done 92 done
146} 93}
147 94
148# Remove occurrences of strings from variable given in $1 95# Remove occurrences of strings from variable given in $1
163 eval new\[\${\#new\[@]}]=\${f} 110 eval new\[\${\#new\[@]}]=\${f}
164 done 111 done
165 eval export ${VAR}=\${new\[*]} 112 eval export ${VAR}=\${new\[*]}
166} 113}
167 114
115# @FUNCTION: filter-flags
116# @USAGE: <flags>
117# @DESCRIPTION:
118# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
168filter-flags() { 119filter-flags() {
169 _filter-hardened "$@" 120 _filter-hardened "$@"
170 _filter-var CFLAGS "$@" 121 _filter-var CFLAGS "$@"
171 _filter-var CPPFLAGS "$@" 122 _filter-var CPPFLAGS "$@"
172 _filter-var CXXFLAGS "$@" 123 _filter-var CXXFLAGS "$@"
124 _filter-var FFLAGS "$@"
125 _filter-var FCFLAGS "$@"
173 return 0 126 return 0
174} 127}
175 128
129# @FUNCTION: filter-lfs-flags
130# @DESCRIPTION:
131# Remove flags that enable Large File Support.
176filter-lfs-flags() { 132filter-lfs-flags() {
177 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 133 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
134 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
135 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
136 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
137 # _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 138 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
179} 139}
180 140
141# @FUNCTION: append-cppflags
142# @USAGE: <flags>
143# @DESCRIPTION:
144# Add extra <flags> to the current CPPFLAGS.
181append-cppflags() { 145append-cppflags() {
182 [[ -z $* ]] && return 0 146 [[ -z $* ]] && return 0
183 export CPPFLAGS="${CPPFLAGS} $*" 147 export CPPFLAGS="${CPPFLAGS} $*"
184 return 0 148 return 0
185} 149}
186 150
151# @FUNCTION: append-cflags
152# @USAGE: <flags>
153# @DESCRIPTION:
154# Add extra <flags> to the current CFLAGS.
155append-cflags() {
156 [[ -z $* ]] && return 0
157 export CFLAGS=$(test-flags-CC ${CFLAGS} $*)
158 return 0
159}
160
161# @FUNCTION: append-cxxflags
162# @USAGE: <flags>
163# @DESCRIPTION:
164# Add extra <flags> to the current CXXFLAGS.
165append-cxxflags() {
166 [[ -z $* ]] && return 0
167 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} $*)
168 return 0
169}
170
171# @FUNCTION: append-fflags
172# @USAGE: <flags>
173# @DESCRIPTION:
174# Add extra <flags> to the current {F,FC}FLAGS.
175append-fflags() {
176 [[ -z $* ]] && return 0
177 export FFLAGS=$(test-flags-F77 ${FFLAGS} $*)
178 export FCFLAGS=$(test-flags-FC ${FCFLAGS} $*)
179 return 0
180}
181
182# @FUNCTION: append-lfs-flags
183# @DESCRIPTION:
184# Add flags that enable Large File Support.
187append-lfs-flags() { 185append-lfs-flags() {
188 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 186 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
187 # 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 188 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
190} 189}
191 190
191# @FUNCTION: append-flags
192# @USAGE: <flags>
193# @DESCRIPTION:
194# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
192append-flags() { 195append-flags() {
193 [[ -z $* ]] && return 0 196 [[ -z $* ]] && return 0
194 export CFLAGS="${CFLAGS} $*" 197 append-cflags "$@"
195 export CXXFLAGS="${CXXFLAGS} $*" 198 append-cxxflags "$@"
199 append-fflags "$@"
196 return 0 200 return 0
197} 201}
198 202
203# @FUNCTION: replace-flags
204# @USAGE: <old> <new>
205# @DESCRIPTION:
206# Replace the <old> flag with <new>. Accepts shell globs for <old>.
199replace-flags() { 207replace-flags() {
200 [[ $# != 2 ]] \ 208 [[ $# != 2 ]] \
201 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 209 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
202 && die "replace-flags takes 2 arguments, not $#" 210 && die "replace-flags takes 2 arguments, not $#"
203 211
204 local f fset 212 local f fset
205 declare -a new_CFLAGS new_CXXFLAGS 213 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
206 214
207 for fset in CFLAGS CXXFLAGS; do 215 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
208 # Looping over the flags instead of using a global 216 # Looping over the flags instead of using a global
209 # substitution ensures that we're working with flag atoms. 217 # substitution ensures that we're working with flag atoms.
210 # Otherwise globs like -O* have the potential to wipe out the 218 # Otherwise globs like -O* have the potential to wipe out the
211 # list of flags. 219 # list of flags.
212 for f in ${!fset}; do 220 for f in ${!fset}; do
218 done 226 done
219 227
220 return 0 228 return 0
221} 229}
222 230
231# @FUNCTION: replace-cpu-flags
232# @USAGE: <old> <new>
233# @DESCRIPTION:
234# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
235# with flags that select the <new> cpu. Accepts shell globs for <old>.
223replace-cpu-flags() { 236replace-cpu-flags() {
224 local newcpu="$#" ; newcpu="${!newcpu}" 237 local newcpu="$#" ; newcpu="${!newcpu}"
225 while [ $# -gt 1 ] ; do 238 while [ $# -gt 1 ] ; do
226 # quote to make sure that no globbing is done (particularly on 239 # quote to make sure that no globbing is done (particularly on
227 # ${oldcpu}) prior to calling replace-flags 240 # ${oldcpu}) prior to calling replace-flags
239 [[ ${x} == $2 ]] && return 0 252 [[ ${x} == $2 ]] && return 0
240 done 253 done
241 return 1 254 return 1
242} 255}
243 256
257# @FUNCTION: is-flagq
258# @USAGE: <flag>
259# @DESCRIPTION:
260# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
244is-flagq() { 261is-flagq() {
245 [[ -n $2 ]] && die "Usage: is-flag <flag>" 262 [[ -n $2 ]] && die "Usage: is-flag <flag>"
246 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 263 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
247} 264}
248 265
266# @FUNCTION: is-flag
267# @USAGE: <flag>
268# @DESCRIPTION:
269# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
249is-flag() { 270is-flag() {
250 is-flagq "$@" && echo true 271 is-flagq "$@" && echo true
251} 272}
252 273
274# @FUNCTION: is-ldflagq
275# @USAGE: <flag>
276# @DESCRIPTION:
277# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
253is-ldflagq() { 278is-ldflagq() {
254 [[ -n $2 ]] && die "Usage: is-ldflag <flag>" 279 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
255 _is_flagq LDFLAGS $1 280 _is_flagq LDFLAGS $1
256} 281}
257 282
283# @FUNCTION: is-ldflag
284# @USAGE: <flag>
285# @DESCRIPTION:
286# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
258is-ldflag() { 287is-ldflag() {
259 is-ldflagq "$@" && echo true 288 is-ldflagq "$@" && echo true
260} 289}
261 290
291# @FUNCTION: filter-mfpmath
292# @USAGE: <math types>
293# @DESCRIPTION:
294# Remove specified math types from the fpmath flag. For example, if the user
295# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
296# -mfpmath=386.
262filter-mfpmath() { 297filter-mfpmath() {
263 local orig_mfpmath new_math prune_math 298 local orig_mfpmath new_math prune_math
264 299
265 # save the original -mfpmath flag 300 # save the original -mfpmath flag
266 orig_mfpmath=$(get-flag -mfpmath) 301 orig_mfpmath=$(get-flag -mfpmath)
285 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 320 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
286 fi 321 fi
287 return 0 322 return 0
288} 323}
289 324
325# @FUNCTION: strip-flags
326# @DESCRIPTION:
327# Strip C[XX]FLAGS of everything except known good/safe flags.
290strip-flags() { 328strip-flags() {
291 local x y flag NEW_CFLAGS NEW_CXXFLAGS 329 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
292 330
293 setup-allowed-flags 331 setup-allowed-flags
294 332
295 local NEW_CFLAGS="" 333 local NEW_CFLAGS=""
296 local NEW_CXXFLAGS="" 334 local NEW_CXXFLAGS=""
335 local NEW_FFLAGS=""
336 local NEW_FCFLAGS=""
297 337
298 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 338 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
299 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 339 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
300 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 340 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
301 fi 341 fi
302 342
303 set -f # disable pathname expansion 343 set -f # disable pathname expansion
304 344
320 break 360 break
321 fi 361 fi
322 done 362 done
323 done 363 done
324 364
365 for x in ${FFLAGS}; do
366 for y in ${ALLOWED_FLAGS}; do
367 flag=${x%%=*}
368 if [ "${flag%%${y}}" = "" ] ; then
369 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
370 break
371 fi
372 done
373 done
374
375 for x in ${FCFLAGS}; do
376 for y in ${ALLOWED_FLAGS}; do
377 flag=${x%%=*}
378 if [ "${flag%%${y}}" = "" ] ; then
379 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
380 break
381 fi
382 done
383 done
384
325 # In case we filtered out all optimization flags fallback to -O2 385 # In case we filtered out all optimization flags fallback to -O2
326 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 386 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
327 NEW_CFLAGS="${NEW_CFLAGS} -O2" 387 NEW_CFLAGS="${NEW_CFLAGS} -O2"
328 fi 388 fi
329 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 389 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
330 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 390 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
331 fi 391 fi
392 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
393 NEW_FFLAGS="${NEW_FFLAGS} -O2"
394 fi
395 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
396 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
397 fi
332 398
333 set +f # re-enable pathname expansion 399 set +f # re-enable pathname expansion
334 400
335 export CFLAGS="${NEW_CFLAGS}" 401 export CFLAGS="${NEW_CFLAGS}"
336 export CXXFLAGS="${NEW_CXXFLAGS}" 402 export CXXFLAGS="${NEW_CXXFLAGS}"
403 export FFLAGS="${NEW_FFLAGS}"
404 export FCFLAGS="${NEW_FCFLAGS}"
337 return 0 405 return 0
338} 406}
339 407
340test-flag-PROG() { 408test-flag-PROG() {
341 local comp=$1 409 local comp=$1
342 local flags="$2" 410 local flags="$2"
343 411
344 [[ -z ${comp} || -z ${flags} ]] && \ 412 [[ -z ${comp} || -z ${flags} ]] && return 1
345 return 1
346 413
414 # use -c so we can test the assembler as well
347 local PROG=$(tc-get${comp}) 415 local PROG=$(tc-get${comp})
348 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 416 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
349 > /dev/null 2>&1 417 > /dev/null 2>&1
350} 418}
351 419
352# Returns true if C compiler support given flag 420# @FUNCTION: test-flag-CC
421# @USAGE: <flag>
422# @DESCRIPTION:
423# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
353test-flag-CC() { test-flag-PROG "CC" "$1"; } 424test-flag-CC() { test-flag-PROG "CC" "$1"; }
354 425
355# Returns true if C++ compiler support given flag 426# @FUNCTION: test-flag-CXX
427# @USAGE: <flag>
428# @DESCRIPTION:
429# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
356test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 430test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
431
432# @FUNCTION: test-flag-F77
433# @USAGE: <flag>
434# @DESCRIPTION:
435# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
436test-flag-F77() { test-flag-PROG "F77" "$1"; }
437
438# @FUNCTION: test-flag-FC
439# @USAGE: <flag>
440# @DESCRIPTION:
441# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
442test-flag-FC() { test-flag-PROG "FC" "$1"; }
357 443
358test-flags-PROG() { 444test-flags-PROG() {
359 local comp=$1 445 local comp=$1
360 local flags 446 local flags
361 local x 447 local x
373 459
374 # Just bail if we dont have any flags 460 # Just bail if we dont have any flags
375 [[ -n ${flags} ]] 461 [[ -n ${flags} ]]
376} 462}
377 463
378# Returns (echo's) the given flags supported by the C compiler 464# @FUNCTION: test-flags-CC
465# @USAGE: <flags>
466# @DESCRIPTION:
467# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
379test-flags-CC() { test-flags-PROG "CC" "$@"; } 468test-flags-CC() { test-flags-PROG "CC" "$@"; }
380 469
381# Returns (echo's) the given flags supported by the C++ compiler 470# @FUNCTION: test-flags-CXX
471# @USAGE: <flags>
472# @DESCRIPTION:
473# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
382test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 474test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
383 475
476# @FUNCTION: test-flags-F77
477# @USAGE: <flags>
478# @DESCRIPTION:
479# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
480test-flags-F77() { test-flags-PROG "F77" "$@"; }
481
482# @FUNCTION: test-flags-FC
483# @USAGE: <flags>
484# @DESCRIPTION:
485# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
486test-flags-FC() { test-flags-PROG "FC" "$@"; }
487
488# @FUNCTION: test-flags
489# @USAGE: <flags>
490# @DESCRIPTION:
384# Short-hand that should hopefully work for both C and C++ compiler, but 491# Short-hand that should hopefully work for both C and C++ compiler, but
385# its really only present due to the append-flags() abomination. 492# its really only present due to the append-flags() abomination.
386test-flags() { test-flags-CC "$@"; } 493test-flags() { test-flags-CC "$@"; }
387 494
388# Depriciated, use test-flags() 495# @FUNCTION: test_version_info
389test_flag() { 496# @USAGE: <version>
390 ewarn "test_flag: deprecated, please use test-flags()!" >&2 497# @DESCRIPTION:
391 498# Returns shell true if the current C compiler version matches <version>, else returns shell false.
392 test-flags-CC "$@" 499# Accepts shell globs.
393}
394
395test_version_info() { 500test_version_info() {
396 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 501 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
397 return 0 502 return 0
398 else 503 else
399 return 1 504 return 1
400 fi 505 fi
401} 506}
402 507
508# @FUNCTION: strip-unsupported-flags
509# @DESCRIPTION:
510# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
403strip-unsupported-flags() { 511strip-unsupported-flags() {
404 export CFLAGS=$(test-flags-CC ${CFLAGS}) 512 export CFLAGS=$(test-flags-CC ${CFLAGS})
405 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) 513 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
514 export FFLAGS=$(test-flags-F77 ${FFLAGS})
515 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
406} 516}
407 517
518# @FUNCTION: get-flag
519# @USAGE: <flag>
520# @DESCRIPTION:
521# Find and echo the value for a particular flag. Accepts shell globs.
408get-flag() { 522get-flag() {
409 local f findflag="$1" 523 local f findflag="$1"
410 524
411 # this code looks a little flaky but seems to work for 525 # this code looks a little flaky but seems to work for
412 # everything we want ... 526 # everything we want ...
413 # for example, if CFLAGS="-march=i686": 527 # for example, if CFLAGS="-march=i686":
414 # `get-flag -march` == "-march=i686" 528 # `get-flag -march` == "-march=i686"
415 # `get-flag march` == "i686" 529 # `get-flag march` == "i686"
416 for f in ${CFLAGS} ${CXXFLAGS} ; do 530 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
417 if [ "${f/${findflag}}" != "${f}" ] ; then 531 if [ "${f/${findflag}}" != "${f}" ] ; then
418 printf "%s\n" "${f/-${findflag}=}" 532 printf "%s\n" "${f/-${findflag}=}"
419 return 0 533 return 0
420 fi 534 fi
421 done 535 done
422 return 1 536 return 1
423} 537}
424 538
425# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 539# DEAD FUNCS. Remove by Dec 2011.
426has_hardened() { 540test_flag() { die "$0: deprecated, please use test-flags()!" ; }
427 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 541has_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 542has_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 543has_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 544has_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 545has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
469 546
470 # note; this matches both -fstack-protector and -fstack-protector-all 547# @FUNCTION: has_m64
471 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 548# @DESCRIPTION:
472 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 549# This doesn't test if the flag is accepted, it tests if the flag actually
473 gcc-specs-ssp 550# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
474} 551# return code is 0, else the return code is 1.
475
476has_m64() { 552has_m64() {
477 # this doesnt test if the flag is accepted, it tests if the flag 553 # this doesnt test if the flag is accepted, it tests if the flag
478 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 554 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
479 # please dont replace this function with test_flag in some future 555 # please dont replace this function with test_flag in some future
480 # clean-up! 556 # clean-up!
487 rm -f "${temp}".c 563 rm -f "${temp}".c
488 [[ ${ret} != 1 ]] && return 0 564 [[ ${ret} != 1 ]] && return 0
489 return 1 565 return 1
490} 566}
491 567
568# @FUNCTION: has_m32
569# @DESCRIPTION:
570# This doesn't test if the flag is accepted, it tests if the flag actually
571# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
572# code is 0, else return code is 1.
492has_m32() { 573has_m32() {
493 # this doesnt test if the flag is accepted, it tests if the flag 574 # this doesnt test if the flag is accepted, it tests if the flag
494 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 575 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
495 # please dont replace this function with test_flag in some future 576 # please dont replace this function with test_flag in some future
496 # clean-up! 577 # clean-up!
505 rm -f "${temp}".c 586 rm -f "${temp}".c
506 [[ ${ret} != 1 ]] && return 0 587 [[ ${ret} != 1 ]] && return 0
507 return 1 588 return 1
508} 589}
509 590
591# @FUNCTION: replace-sparc64-flags
592# @DESCRIPTION:
593# Sets mcpu to v8 and uses the original value as mtune if none specified.
510replace-sparc64-flags() { 594replace-sparc64-flags() {
511 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 595 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
512 596
513 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 597 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
514 for x in ${SPARC64_CPUS}; do 598 for x in ${SPARC64_CPUS}; do
531 fi 615 fi
532 616
533 export CFLAGS CXXFLAGS 617 export CFLAGS CXXFLAGS
534} 618}
535 619
620# @FUNCTION: append-libs
621# @USAGE: <libs>
622# @DESCRIPTION:
623# Add extra <libs> to the current LIBS.
624append-libs() {
625 [[ -z $* ]] && return 0
626 local flag
627 for flag in "$@"; do
628 [[ ${flag} == -l* ]] && flag=${flag#-l}
629 export LIBS="${LIBS} -l${flag}"
630 done
631
632 return 0
633}
634
635# @FUNCTION: append-ldflags
636# @USAGE: <flags>
637# @DESCRIPTION:
638# Add extra <flags> to the current LDFLAGS.
536append-ldflags() { 639append-ldflags() {
537 [[ -z $* ]] && return 0 640 [[ -z $* ]] && return 0
641 local flag
642 for flag in "$@"; do
643 [[ ${flag} == -l* ]] && \
644 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
645 done
646
538 export LDFLAGS="${LDFLAGS} $*" 647 export LDFLAGS="${LDFLAGS} $*"
539 return 0 648 return 0
540} 649}
541 650
542# Remove flags from LDFLAGS - it's up to the ebuild to filter 651# @FUNCTION: filter-ldflags
543# CFLAGS and CXXFLAGS via filter-flags if they need to. 652# @USAGE: <flags>
653# @DESCRIPTION:
654# Remove particular <flags> from LDFLAGS. Accepts shell globs.
544filter-ldflags() { 655filter-ldflags() {
545 _filter-var LDFLAGS "$@" 656 _filter-var LDFLAGS "$@"
546 return 0 657 return 0
547} 658}
548 659
660# @FUNCTION: raw-ldflags
661# @USAGE: [flags]
662# @DESCRIPTION:
549# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 663# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
550# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 664# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
551# to gcc where it needs the '-Wl,'. 665# to gcc where it needs the '-Wl,'.
666#
667# If no flags are specified, then default to ${LDFLAGS}.
552raw-ldflags() { 668raw-ldflags() {
553 local x input="$@" 669 local x input="$@"
554 [[ -z ${input} ]] && input=${LDFLAGS} 670 [[ -z ${input} ]] && input=${LDFLAGS}
555 set -- 671 set --
556 for x in ${input} ; do 672 for x in ${input} ; do
558 set -- "$@" ${x//,/ } 674 set -- "$@" ${x//,/ }
559 done 675 done
560 echo "$@" 676 echo "$@"
561} 677}
562 678
563# Gets the flags needed for "NOW" binding 679# @FUNCTION: no-as-needed
564bindnow-flags() { 680# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
681no-as-needed() {
565 case $($(tc-getLD) -v 2>&1 </dev/null) in 682 case $($(tc-getLD) -v 2>&1 </dev/null) in
566 *GNU* | *'with BFD'*) # GNU ld 683 *GNU*) # GNU ld
567 echo "-Wl,-z,now" ;; 684 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 685 esac
578} 686}
579
580 687
581# Some tests for when we screw with things and want to make 688# Some tests for when we screw with things and want to make
582# sure we didn't break anything 689# sure we didn't break anything
583#TESTS() { 690#TESTS() {
584# CFLAGS="-a -b -c=1" 691# CFLAGS="-a -b -c=1"

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