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1# Copyright 1999-2007 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 1.118 2007/03/24 07:07:18 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.137 2009/05/24 00:33:33 mr_bones_ 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 -fno-bounds-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="${ALLOWED_FLAGS} -fno-ident"
40 export ALLOWED_FLAGS="${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 \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
108 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
109 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
110 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
111 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
112 -mieee -mieee-with-inexact -mschedule \ 49 -mieee -mieee-with-inexact -mschedule \
113 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
114 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
115 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
116 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
117 -msecure-plt -D*" 54 -msecure-plt -m*-toc -D* -U*"
118 55
119 # 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
120 # NOTE: currently -Os have issues with gcc3 and K6* arch's 57 # NOTE: currently -Os have issues with gcc3 and K6* arch's
121 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
122 return 0 59 return 0
123} 60}
124 61
134 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 71 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
135 gcc-specs-pie || continue 72 gcc-specs-pie || continue
136 is-flagq -nopie || append-flags -nopie;; 73 is-flagq -nopie || append-flags -nopie;;
137 -fstack-protector) 74 -fstack-protector)
138 gcc-specs-ssp || continue 75 gcc-specs-ssp || continue
139 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 76 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
140 -fstack-protector-all) 77 -fstack-protector-all)
141 gcc-specs-ssp-to-all || continue 78 gcc-specs-ssp-to-all || continue
142 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);;
143 esac 83 esac
144 done 84 done
145} 85}
146 86
147# Remove occurrences of strings from variable given in $1 87# Remove occurrences of strings from variable given in $1
162 eval new\[\${\#new\[@]}]=\${f} 102 eval new\[\${\#new\[@]}]=\${f}
163 done 103 done
164 eval export ${VAR}=\${new\[*]} 104 eval export ${VAR}=\${new\[*]}
165} 105}
166 106
107# @FUNCTION: filter-flags
108# @USAGE: <flags>
109# @DESCRIPTION:
110# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
167filter-flags() { 111filter-flags() {
168 _filter-hardened "$@" 112 _filter-hardened "$@"
169 _filter-var CFLAGS "$@" 113 _filter-var CFLAGS "$@"
170 _filter-var CPPFLAGS "$@" 114 _filter-var CPPFLAGS "$@"
171 _filter-var CXXFLAGS "$@" 115 _filter-var CXXFLAGS "$@"
116 _filter-var FFLAGS "$@"
117 _filter-var FCFLAGS "$@"
172 return 0 118 return 0
173} 119}
174 120
121# @FUNCTION: filter-lfs-flags
122# @DESCRIPTION:
123# Remove flags that enable Large File Support.
175filter-lfs-flags() { 124filter-lfs-flags() {
176 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 125 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
177 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
178} 127}
179 128
129# @FUNCTION: append-cppflags
130# @USAGE: <flags>
131# @DESCRIPTION:
132# Add extra <flags> to the current CPPFLAGS.
180append-cppflags() { 133append-cppflags() {
181 [[ -z $* ]] && return 0 134 [[ -z $* ]] && return 0
182 export CPPFLAGS="${CPPFLAGS} $*" 135 export CPPFLAGS="${CPPFLAGS} $*"
183 return 0 136 return 0
184} 137}
185 138
139# @FUNCTION: append-cflags
140# @USAGE: <flags>
141# @DESCRIPTION:
142# Add extra <flags> to the current CFLAGS.
143append-cflags() {
144 [[ -z $* ]] && return 0
145 export CFLAGS="${CFLAGS} $*"
146 return 0
147}
148
149# @FUNCTION: append-cxxflags
150# @USAGE: <flags>
151# @DESCRIPTION:
152# Add extra <flags> to the current CXXFLAGS.
153append-cxxflags() {
154 [[ -z $* ]] && return 0
155 export CXXFLAGS="${CXXFLAGS} $*"
156 return 0
157}
158
159# @FUNCTION: append-fflags
160# @USAGE: <flags>
161# @DESCRIPTION:
162# Add extra <flags> to the current {F,FC}FLAGS.
163append-fflags() {
164 [[ -z $* ]] && return 0
165 export FFLAGS="${FFLAGS} $*"
166 export FCFLAGS="${FCFLAGS} $*"
167 return 0
168}
169
170# @FUNCTION: append-lfs-flags
171# @DESCRIPTION:
172# Add flags that enable Large File Support.
186append-lfs-flags() { 173append-lfs-flags() {
187 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 174 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
188 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 175 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
189} 176}
190 177
178# @FUNCTION: append-flags
179# @USAGE: <flags>
180# @DESCRIPTION:
181# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
191append-flags() { 182append-flags() {
192 [[ -z $* ]] && return 0 183 [[ -z $* ]] && return 0
193 export CFLAGS="${CFLAGS} $*" 184 append-cflags "$@"
194 export CXXFLAGS="${CXXFLAGS} $*" 185 append-cppflags "$@"
186 append-fflags "$@"
195 return 0 187 return 0
196} 188}
197 189
190# @FUNCTION: replace-flags
191# @USAGE: <old> <new>
192# @DESCRIPTION:
193# Replace the <old> flag with <new>. Accepts shell globs for <old>.
198replace-flags() { 194replace-flags() {
199 [[ $# != 2 ]] \ 195 [[ $# != 2 ]] \
200 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 196 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
201 && die "replace-flags takes 2 arguments, not $#" 197 && die "replace-flags takes 2 arguments, not $#"
202 198
203 local f fset 199 local f fset
204 declare -a new_CFLAGS new_CXXFLAGS 200 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
205 201
206 for fset in CFLAGS CXXFLAGS; do 202 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
207 # Looping over the flags instead of using a global 203 # Looping over the flags instead of using a global
208 # substitution ensures that we're working with flag atoms. 204 # substitution ensures that we're working with flag atoms.
209 # Otherwise globs like -O* have the potential to wipe out the 205 # Otherwise globs like -O* have the potential to wipe out the
210 # list of flags. 206 # list of flags.
211 for f in ${!fset}; do 207 for f in ${!fset}; do
217 done 213 done
218 214
219 return 0 215 return 0
220} 216}
221 217
218# @FUNCTION: replace-cpu-flags
219# @USAGE: <old> <new>
220# @DESCRIPTION:
221# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
222# with flags that select the <new> cpu. Accepts shell globs for <old>.
222replace-cpu-flags() { 223replace-cpu-flags() {
223 local newcpu="$#" ; newcpu="${!newcpu}" 224 local newcpu="$#" ; newcpu="${!newcpu}"
224 while [ $# -gt 1 ] ; do 225 while [ $# -gt 1 ] ; do
225 # quote to make sure that no globbing is done (particularly on 226 # quote to make sure that no globbing is done (particularly on
226 # ${oldcpu}) prior to calling replace-flags 227 # ${oldcpu}) prior to calling replace-flags
238 [[ ${x} == $2 ]] && return 0 239 [[ ${x} == $2 ]] && return 0
239 done 240 done
240 return 1 241 return 1
241} 242}
242 243
244# @FUNCTION: is-flagq
245# @USAGE: <flag>
246# @DESCRIPTION:
247# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
243is-flagq() { 248is-flagq() {
244 [[ -n $2 ]] && die "Usage: is-flag <flag>" 249 [[ -n $2 ]] && die "Usage: is-flag <flag>"
245 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 250 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
246} 251}
247 252
253# @FUNCTION: is-flag
254# @USAGE: <flag>
255# @DESCRIPTION:
256# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
248is-flag() { 257is-flag() {
249 is-flagq "$@" && echo true 258 is-flagq "$@" && echo true
250} 259}
251 260
261# @FUNCTION: is-ldflagq
262# @USAGE: <flag>
263# @DESCRIPTION:
264# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
252is-ldflagq() { 265is-ldflagq() {
253 [[ -n $2 ]] && die "Usage: is-ldflag <flag>" 266 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
254 _is_flagq LDFLAGS $1 267 _is_flagq LDFLAGS $1
255} 268}
256 269
270# @FUNCTION: is-ldflag
271# @USAGE: <flag>
272# @DESCRIPTION:
273# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
257is-ldflag() { 274is-ldflag() {
258 is-ldflagq "$@" && echo true 275 is-ldflagq "$@" && echo true
259} 276}
260 277
278# @FUNCTION: filter-mfpmath
279# @USAGE: <math types>
280# @DESCRIPTION:
281# Remove specified math types from the fpmath flag. For example, if the user
282# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
283# -mfpmath=386.
261filter-mfpmath() { 284filter-mfpmath() {
262 local orig_mfpmath new_math prune_math 285 local orig_mfpmath new_math prune_math
263 286
264 # save the original -mfpmath flag 287 # save the original -mfpmath flag
265 orig_mfpmath=$(get-flag -mfpmath) 288 orig_mfpmath=$(get-flag -mfpmath)
284 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 307 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
285 fi 308 fi
286 return 0 309 return 0
287} 310}
288 311
312# @FUNCTION: strip-flags
313# @DESCRIPTION:
314# Strip C[XX]FLAGS of everything except known good/safe flags.
289strip-flags() { 315strip-flags() {
290 local x y flag NEW_CFLAGS NEW_CXXFLAGS 316 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
291 317
292 setup-allowed-flags 318 setup-allowed-flags
293 319
294 local NEW_CFLAGS="" 320 local NEW_CFLAGS=""
295 local NEW_CXXFLAGS="" 321 local NEW_CXXFLAGS=""
322 local NEW_FFLAGS=""
323 local NEW_FCFLAGS=""
296 324
297 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 325 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
298 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 326 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
299 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 327 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
300 fi 328 fi
319 break 347 break
320 fi 348 fi
321 done 349 done
322 done 350 done
323 351
352 for x in ${FFLAGS}; do
353 for y in ${ALLOWED_FLAGS}; do
354 flag=${x%%=*}
355 if [ "${flag%%${y}}" = "" ] ; then
356 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
357 break
358 fi
359 done
360 done
361
362 for x in ${FCFLAGS}; do
363 for y in ${ALLOWED_FLAGS}; do
364 flag=${x%%=*}
365 if [ "${flag%%${y}}" = "" ] ; then
366 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
367 break
368 fi
369 done
370 done
371
324 # In case we filtered out all optimization flags fallback to -O2 372 # In case we filtered out all optimization flags fallback to -O2
325 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 373 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
326 NEW_CFLAGS="${NEW_CFLAGS} -O2" 374 NEW_CFLAGS="${NEW_CFLAGS} -O2"
327 fi 375 fi
328 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 376 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
329 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 377 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
330 fi 378 fi
379 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
380 NEW_FFLAGS="${NEW_FFLAGS} -O2"
381 fi
382 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
383 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
384 fi
331 385
332 set +f # re-enable pathname expansion 386 set +f # re-enable pathname expansion
333 387
334 export CFLAGS="${NEW_CFLAGS}" 388 export CFLAGS="${NEW_CFLAGS}"
335 export CXXFLAGS="${NEW_CXXFLAGS}" 389 export CXXFLAGS="${NEW_CXXFLAGS}"
390 export FFLAGS="${NEW_FFLAGS}"
391 export FCFLAGS="${NEW_FCFLAGS}"
336 return 0 392 return 0
337} 393}
338 394
339test-flag-PROG() { 395test-flag-PROG() {
340 local comp=$1 396 local comp=$1
346 local PROG=$(tc-get${comp}) 402 local PROG=$(tc-get${comp})
347 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 403 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
348 > /dev/null 2>&1 404 > /dev/null 2>&1
349} 405}
350 406
351# Returns true if C compiler support given flag 407# @FUNCTION: test-flag-CC
408# @USAGE: <flag>
409# @DESCRIPTION:
410# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
352test-flag-CC() { test-flag-PROG "CC" "$1"; } 411test-flag-CC() { test-flag-PROG "CC" "$1"; }
353 412
354# Returns true if C++ compiler support given flag 413# @FUNCTION: test-flag-CXX
414# @USAGE: <flag>
415# @DESCRIPTION:
416# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
355test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 417test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
418
419# @FUNCTION: test-flag-F77
420# @USAGE: <flag>
421# @DESCRIPTION:
422# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
423test-flag-F77() { test-flag-PROG "F77" "$1"; }
424
425# @FUNCTION: test-flag-FC
426# @USAGE: <flag>
427# @DESCRIPTION:
428# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
429test-flag-FC() { test-flag-PROG "FC" "$1"; }
356 430
357test-flags-PROG() { 431test-flags-PROG() {
358 local comp=$1 432 local comp=$1
359 local flags 433 local flags
360 local x 434 local x
372 446
373 # Just bail if we dont have any flags 447 # Just bail if we dont have any flags
374 [[ -n ${flags} ]] 448 [[ -n ${flags} ]]
375} 449}
376 450
377# Returns (echo's) the given flags supported by the C compiler 451# @FUNCTION: test-flags-CC
452# @USAGE: <flags>
453# @DESCRIPTION:
454# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
378test-flags-CC() { test-flags-PROG "CC" "$@"; } 455test-flags-CC() { test-flags-PROG "CC" "$@"; }
379 456
380# Returns (echo's) the given flags supported by the C++ compiler 457# @FUNCTION: test-flags-CXX
458# @USAGE: <flags>
459# @DESCRIPTION:
460# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
381test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 461test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
382 462
463# @FUNCTION: test-flags-F77
464# @USAGE: <flags>
465# @DESCRIPTION:
466# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
467test-flags-F77() { test-flags-PROG "F77" "$@"; }
468
469# @FUNCTION: test-flags-FC
470# @USAGE: <flags>
471# @DESCRIPTION:
472# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
473test-flags-FC() { test-flags-PROG "FC" "$@"; }
474
475# @FUNCTION: test-flags
476# @USAGE: <flags>
477# @DESCRIPTION:
383# Short-hand that should hopefully work for both C and C++ compiler, but 478# Short-hand that should hopefully work for both C and C++ compiler, but
384# its really only present due to the append-flags() abomination. 479# its really only present due to the append-flags() abomination.
385test-flags() { test-flags-CC "$@"; } 480test-flags() { test-flags-CC "$@"; }
386 481
387# Depriciated, use test-flags() 482# @FUNCTION: test_flag
483# @DESCRIPTION:
484# DEPRICIATED, use test-flags()
388test_flag() { 485test_flag() {
389 ewarn "test_flag: deprecated, please use test-flags()!" >&2 486 ewarn "test_flag: deprecated, please use test-flags()!" >&2
390 487
391 test-flags-CC "$@" 488 test-flags-CC "$@"
392} 489}
393 490
491# @FUNCTION: test_version_info
492# @USAGE: <version>
493# @DESCRIPTION:
494# Returns shell true if the current C compiler version matches <version>, else returns shell false.
495# Accepts shell globs.
394test_version_info() { 496test_version_info() {
395 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 497 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
396 return 0 498 return 0
397 else 499 else
398 return 1 500 return 1
399 fi 501 fi
400} 502}
401 503
504# @FUNCTION: strip-unsupported-flags
505# @DESCRIPTION:
506# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
402strip-unsupported-flags() { 507strip-unsupported-flags() {
403 export CFLAGS=$(test-flags-CC ${CFLAGS}) 508 export CFLAGS=$(test-flags-CC ${CFLAGS})
404 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) 509 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
510 export FFLAGS=$(test-flags-F77 ${FFLAGS})
511 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
405} 512}
406 513
514# @FUNCTION: get-flag
515# @USAGE: <flag>
516# @DESCRIPTION:
517# Find and echo the value for a particular flag. Accepts shell globs.
407get-flag() { 518get-flag() {
408 local f findflag="$1" 519 local f findflag="$1"
409 520
410 # this code looks a little flaky but seems to work for 521 # this code looks a little flaky but seems to work for
411 # everything we want ... 522 # everything we want ...
412 # for example, if CFLAGS="-march=i686": 523 # for example, if CFLAGS="-march=i686":
413 # `get-flag -march` == "-march=i686" 524 # `get-flag -march` == "-march=i686"
414 # `get-flag march` == "i686" 525 # `get-flag march` == "i686"
415 for f in ${CFLAGS} ${CXXFLAGS} ; do 526 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
416 if [ "${f/${findflag}}" != "${f}" ] ; then 527 if [ "${f/${findflag}}" != "${f}" ] ; then
417 printf "%s\n" "${f/-${findflag}=}" 528 printf "%s\n" "${f/-${findflag}=}"
418 return 0 529 return 0
419 fi 530 fi
420 done 531 done
421 return 1 532 return 1
422} 533}
423 534
535# @FUNCTION: has_hardened
536# @DESCRIPTION:
424# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 537# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
425has_hardened() { 538has_hardened() {
426 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 539 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
427 540
428 test_version_info Hardened && return 0 541 test_version_info Hardened && return 0
429 # The specs file wont exist unless gcc has GCC_SPECS support 542 # The specs file wont exist unless gcc has GCC_SPECS support
430 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 543 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
431} 544}
432 545
546# @FUNCTION: has_pic
547# @DESCRIPTION:
433# DEPRECATED - use gcc-specs-pie from toolchain-funcs 548# DEPRECATED - use gcc-specs-pie from toolchain-funcs
434# indicate whether PIC is set 549# indicate whether PIC is set
435has_pic() { 550has_pic() {
436 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 551 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
437 552
438 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 553 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
439 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \ 554 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
440 gcc-specs-pie 555 gcc-specs-pie
441} 556}
442 557
558# @FUNCTION: has_pie
559# @DESCRIPTION:
443# DEPRECATED - use gcc-specs-pie from toolchain-funcs 560# DEPRECATED - use gcc-specs-pie from toolchain-funcs
444# indicate whether PIE is set 561# indicate whether PIE is set
445has_pie() { 562has_pie() {
446 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 563 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
447 564
448 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 565 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
449 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \ 566 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
450 gcc-specs-pie 567 gcc-specs-pie
451} 568}
452 569
570# @FUNCTION: has_ssp_all
571# @DESCRIPTION:
453# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 572# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
454# indicate whether code for SSP is being generated for all functions 573# indicate whether code for SSP is being generated for all functions
455has_ssp_all() { 574has_ssp_all() {
456 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 575 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
457 576
458 # note; this matches only -fstack-protector-all 577 # note; this matches only -fstack-protector-all
459 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 578 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
460 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 579 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
461 gcc-specs-ssp-all 580 gcc-specs-ssp-to-all
462} 581}
463 582
583# @FUNCTION: has_ssp
584# @DESCRIPTION:
464# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 585# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
465# indicate whether code for SSP is being generated 586# indicate whether code for SSP is being generated
466has_ssp() { 587has_ssp() {
467 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 588 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
468 589
470 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 591 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
471 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 592 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
472 gcc-specs-ssp 593 gcc-specs-ssp
473} 594}
474 595
596# @FUNCTION: has_m64
597# @DESCRIPTION:
598# This doesn't test if the flag is accepted, it tests if the flag actually
599# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
600# return code is 0, else the return code is 1.
475has_m64() { 601has_m64() {
476 # this doesnt test if the flag is accepted, it tests if the flag 602 # this doesnt test if the flag is accepted, it tests if the flag
477 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 603 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
478 # please dont replace this function with test_flag in some future 604 # please dont replace this function with test_flag in some future
479 # clean-up! 605 # clean-up!
486 rm -f "${temp}".c 612 rm -f "${temp}".c
487 [[ ${ret} != 1 ]] && return 0 613 [[ ${ret} != 1 ]] && return 0
488 return 1 614 return 1
489} 615}
490 616
617# @FUNCTION: has_m32
618# @DESCRIPTION:
619# This doesn't test if the flag is accepted, it tests if the flag actually
620# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
621# code is 0, else return code is 1.
491has_m32() { 622has_m32() {
492 # this doesnt test if the flag is accepted, it tests if the flag 623 # this doesnt test if the flag is accepted, it tests if the flag
493 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 624 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
494 # please dont replace this function with test_flag in some future 625 # please dont replace this function with test_flag in some future
495 # clean-up! 626 # clean-up!
504 rm -f "${temp}".c 635 rm -f "${temp}".c
505 [[ ${ret} != 1 ]] && return 0 636 [[ ${ret} != 1 ]] && return 0
506 return 1 637 return 1
507} 638}
508 639
640# @FUNCTION: replace-sparc64-flags
641# @DESCRIPTION:
642# Sets mcpu to v8 and uses the original value as mtune if none specified.
509replace-sparc64-flags() { 643replace-sparc64-flags() {
510 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 644 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
511 645
512 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 646 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
513 for x in ${SPARC64_CPUS}; do 647 for x in ${SPARC64_CPUS}; do
530 fi 664 fi
531 665
532 export CFLAGS CXXFLAGS 666 export CFLAGS CXXFLAGS
533} 667}
534 668
669# @FUNCTION: append-ldflags
670# @USAGE: <flags>
671# @DESCRIPTION:
672# Add extra <flags> to the current LDFLAGS.
535append-ldflags() { 673append-ldflags() {
536 [[ -z $* ]] && return 0 674 [[ -z $* ]] && return 0
675 local flag
676 for flag in "$@"; do
677 [[ ${flag} == -l* ]] && \
678 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
679 done
680
537 export LDFLAGS="${LDFLAGS} $*" 681 export LDFLAGS="${LDFLAGS} $*"
538 return 0 682 return 0
539} 683}
540 684
541# Remove flags from LDFLAGS - it's up to the ebuild to filter 685# @FUNCTION: filter-ldflags
542# CFLAGS and CXXFLAGS via filter-flags if they need to. 686# @USAGE: <flags>
687# @DESCRIPTION:
688# Remove particular <flags> from LDFLAGS. Accepts shell globs.
543filter-ldflags() { 689filter-ldflags() {
544 _filter-var LDFLAGS "$@" 690 _filter-var LDFLAGS "$@"
545 return 0 691 return 0
546} 692}
547 693
694# @FUNCTION: raw-ldflags
695# @USAGE: <flags>
696# @DESCRIPTION:
548# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 697# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
549# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 698# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
550# to gcc where it needs the '-Wl,'. 699# to gcc where it needs the '-Wl,'.
551raw-ldflags() { 700raw-ldflags() {
552 local x input="$@" 701 local x input="$@"
557 set -- "$@" ${x//,/ } 706 set -- "$@" ${x//,/ }
558 done 707 done
559 echo "$@" 708 echo "$@"
560} 709}
561 710
711# @FUNCTION: bindnow-flags
712# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
713# @DESCRIPTION:
562# Gets the flags needed for "NOW" binding 714# DEPRECATED - Gets the flags needed for "NOW" binding
563bindnow-flags() { 715bindnow-flags() {
564 case $($(tc-getLD) -v 2>&1 </dev/null) in 716 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild"
565 *GNU* | *'with BFD'*) # GNU ld
566 echo "-Wl,-z,now" ;;
567 *Apple*) # Darwin ld
568 echo "-bind_at_load" ;;
569 *)
570 # Some linkers just recognize -V instead of -v
571 case $($(tc-getLD) -V 2>&1 </dev/null) in
572 *Solaris*) # Solaris accept almost the same GNU options
573 echo "-Wl,-z,now" ;;
574 esac
575 ;;
576 esac
577} 717}
578 718
579 719
580# Some tests for when we screw with things and want to make 720# Some tests for when we screw with things and want to make
581# sure we didn't break anything 721# sure we didn't break anything

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