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1# Copyright 1999-2007 Gentoo Foundation 1# Copyright 1999-2008 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 1.123 2008/06/07 16:42:32 flameeyes 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 27
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 28
94# C[XX]FLAGS that we allow in strip-flags 29# C[XX]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="${ALLOWED_FLAGS} -fbounds-checking"
102 export ALLOWED_FLAGS="${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"
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 \
162 eval new\[\${\#new\[@]}]=\${f} 99 eval new\[\${\#new\[@]}]=\${f}
163 done 100 done
164 eval export ${VAR}=\${new\[*]} 101 eval export ${VAR}=\${new\[*]}
165} 102}
166 103
104# @FUNCTION: filter-flags
105# @USAGE: <flags>
106# @DESCRIPTION:
107# Remove particular <flags> from {C,CPP,CXX}FLAGS. Accepts shell globs.
167filter-flags() { 108filter-flags() {
168 _filter-hardened "$@" 109 _filter-hardened "$@"
169 _filter-var CFLAGS "$@" 110 _filter-var CFLAGS "$@"
170 _filter-var CPPFLAGS "$@" 111 _filter-var CPPFLAGS "$@"
171 _filter-var CXXFLAGS "$@" 112 _filter-var CXXFLAGS "$@"
172 return 0 113 return 0
173} 114}
174 115
116# @FUNCTION: filter-lfs-flags
117# @DESCRIPTION:
118# Remove flags that enable Large File Support.
175filter-lfs-flags() { 119filter-lfs-flags() {
176 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 120 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
177 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 121 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
178} 122}
179 123
124# @FUNCTION: append-cppflags
125# @USAGE: <flags>
126# @DESCRIPTION:
127# Add extra <flags> to the current CPPFLAGS.
180append-cppflags() { 128append-cppflags() {
181 [[ -z $* ]] && return 0 129 [[ -z $* ]] && return 0
182 export CPPFLAGS="${CPPFLAGS} $*" 130 export CPPFLAGS="${CPPFLAGS} $*"
183 return 0 131 return 0
184} 132}
185 133
134# @FUNCTION: append-lfs-flags
135# @DESCRIPTION:
136# Add flags that enable Large File Support.
186append-lfs-flags() { 137append-lfs-flags() {
187 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 138 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
188 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 139 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
189} 140}
190 141
142# @FUNCTION: append-flags
143# @USAGE: <flags>
144# @DESCRIPTION:
145# Add extra <flags> to your current C[XX]FLAGS.
191append-flags() { 146append-flags() {
192 [[ -z $* ]] && return 0 147 [[ -z $* ]] && return 0
193 export CFLAGS="${CFLAGS} $*" 148 export CFLAGS="${CFLAGS} $*"
194 export CXXFLAGS="${CXXFLAGS} $*" 149 export CXXFLAGS="${CXXFLAGS} $*"
195 return 0 150 return 0
196} 151}
197 152
153# @FUNCTION: replace-flags
154# @USAGE: <old> <new>
155# @DESCRIPTION:
156# Replace the <old> flag with <new>. Accepts shell globs for <old>.
198replace-flags() { 157replace-flags() {
199 [[ $# != 2 ]] \ 158 [[ $# != 2 ]] \
200 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 159 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
201 && die "replace-flags takes 2 arguments, not $#" 160 && die "replace-flags takes 2 arguments, not $#"
202 161
217 done 176 done
218 177
219 return 0 178 return 0
220} 179}
221 180
181# @FUNCTION: replace-cpu-flags
182# @USAGE: <old> <new>
183# @DESCRIPTION:
184# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
185# with flags that select the <new> cpu. Accepts shell globs for <old>.
222replace-cpu-flags() { 186replace-cpu-flags() {
223 local newcpu="$#" ; newcpu="${!newcpu}" 187 local newcpu="$#" ; newcpu="${!newcpu}"
224 while [ $# -gt 1 ] ; do 188 while [ $# -gt 1 ] ; do
225 # quote to make sure that no globbing is done (particularly on 189 # quote to make sure that no globbing is done (particularly on
226 # ${oldcpu}) prior to calling replace-flags 190 # ${oldcpu}) prior to calling replace-flags
238 [[ ${x} == $2 ]] && return 0 202 [[ ${x} == $2 ]] && return 0
239 done 203 done
240 return 1 204 return 1
241} 205}
242 206
207# @FUNCTION: is-flagq
208# @USAGE: <flag>
209# @DESCRIPTION:
210# Returns shell true if <flag> is in C[XX]FLAGS, else returns shell false. Accepts shell globs.
243is-flagq() { 211is-flagq() {
244 [[ -n $2 ]] && die "Usage: is-flag <flag>" 212 [[ -n $2 ]] && die "Usage: is-flag <flag>"
245 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 213 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1
246} 214}
247 215
216# @FUNCTION: is-flag
217# @USAGE: <flag>
218# @DESCRIPTION:
219# Echo's "true" if flag is set in C[XX]FLAGS. Accepts shell globs.
248is-flag() { 220is-flag() {
249 is-flagq "$@" && echo true 221 is-flagq "$@" && echo true
250} 222}
251 223
224# @FUNCTION: is-ldflagq
225# @USAGE: <flag>
226# @DESCRIPTION:
227# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
252is-ldflagq() { 228is-ldflagq() {
253 [[ -n $2 ]] && die "Usage: is-ldflag <flag>" 229 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
254 _is_flagq LDFLAGS $1 230 _is_flagq LDFLAGS $1
255} 231}
256 232
233# @FUNCTION: is-ldflag
234# @USAGE: <flag>
235# @DESCRIPTION:
236# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
257is-ldflag() { 237is-ldflag() {
258 is-ldflagq "$@" && echo true 238 is-ldflagq "$@" && echo true
259} 239}
260 240
241# @FUNCTION: filter-mfpmath
242# @USAGE: <math types>
243# @DESCRIPTION:
244# Remove specified math types from the fpmath flag. For example, if the user
245# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
246# -mfpmath=386.
261filter-mfpmath() { 247filter-mfpmath() {
262 local orig_mfpmath new_math prune_math 248 local orig_mfpmath new_math prune_math
263 249
264 # save the original -mfpmath flag 250 # save the original -mfpmath flag
265 orig_mfpmath=$(get-flag -mfpmath) 251 orig_mfpmath=$(get-flag -mfpmath)
284 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 270 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
285 fi 271 fi
286 return 0 272 return 0
287} 273}
288 274
275# @FUNCTION: strip-flags
276# @DESCRIPTION:
277# Strip C[XX]FLAGS of everything except known good/safe flags.
289strip-flags() { 278strip-flags() {
290 local x y flag NEW_CFLAGS NEW_CXXFLAGS 279 local x y flag NEW_CFLAGS NEW_CXXFLAGS
291 280
292 setup-allowed-flags 281 setup-allowed-flags
293 282
346 local PROG=$(tc-get${comp}) 335 local PROG=$(tc-get${comp})
347 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 336 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
348 > /dev/null 2>&1 337 > /dev/null 2>&1
349} 338}
350 339
351# Returns true if C compiler support given flag 340# @FUNCTION: test-flag-CC
341# @USAGE: <flag>
342# @DESCRIPTION:
343# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
352test-flag-CC() { test-flag-PROG "CC" "$1"; } 344test-flag-CC() { test-flag-PROG "CC" "$1"; }
353 345
354# Returns true if C++ compiler support given flag 346# @FUNCTION: test-flag-CXX
347# @USAGE: <flag>
348# @DESCRIPTION:
349# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
355test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 350test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
356 351
357test-flags-PROG() { 352test-flags-PROG() {
358 local comp=$1 353 local comp=$1
359 local flags 354 local flags
372 367
373 # Just bail if we dont have any flags 368 # Just bail if we dont have any flags
374 [[ -n ${flags} ]] 369 [[ -n ${flags} ]]
375} 370}
376 371
377# Returns (echo's) the given flags supported by the C compiler 372# @FUNCTION: test-flags-CC
373# @USAGE: <flags>
374# @DESCRIPTION:
375# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
378test-flags-CC() { test-flags-PROG "CC" "$@"; } 376test-flags-CC() { test-flags-PROG "CC" "$@"; }
379 377
380# Returns (echo's) the given flags supported by the C++ compiler 378# @FUNCTION: test-flags-CXX
379# @USAGE: <flags>
380# @DESCRIPTION:
381# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
381test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 382test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
382 383
384# @FUNCTION: test-flags
385# @USAGE: <flags>
386# @DESCRIPTION:
383# Short-hand that should hopefully work for both C and C++ compiler, but 387# Short-hand that should hopefully work for both C and C++ compiler, but
384# its really only present due to the append-flags() abomination. 388# its really only present due to the append-flags() abomination.
385test-flags() { test-flags-CC "$@"; } 389test-flags() { test-flags-CC "$@"; }
386 390
387# Depriciated, use test-flags() 391# @FUNCTION: test_flag
392# @DESCRIPTION:
393# DEPRICIATED, use test-flags()
388test_flag() { 394test_flag() {
389 ewarn "test_flag: deprecated, please use test-flags()!" >&2 395 ewarn "test_flag: deprecated, please use test-flags()!" >&2
390 396
391 test-flags-CC "$@" 397 test-flags-CC "$@"
392} 398}
393 399
400# @FUNCTION: test_version_info
401# @USAGE: <version>
402# @DESCRIPTION:
403# Returns shell true if the current C compiler version matches <version>, else returns shell false.
404# Accepts shell globs.
394test_version_info() { 405test_version_info() {
395 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 406 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
396 return 0 407 return 0
397 else 408 else
398 return 1 409 return 1
399 fi 410 fi
400} 411}
401 412
413# @FUNCTION: strip-unsupported-flags
414# @DESCRIPTION:
415# Strip C[XX]FLAGS of any flags not supported by the active toolchain.
402strip-unsupported-flags() { 416strip-unsupported-flags() {
403 export CFLAGS=$(test-flags-CC ${CFLAGS}) 417 export CFLAGS=$(test-flags-CC ${CFLAGS})
404 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) 418 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
405} 419}
406 420
421# @FUNCTION: get-flag
422# @USAGE: <flag>
423# @DESCRIPTION:
424# Find and echo the value for a particular flag. Accepts shell globs.
407get-flag() { 425get-flag() {
408 local f findflag="$1" 426 local f findflag="$1"
409 427
410 # this code looks a little flaky but seems to work for 428 # this code looks a little flaky but seems to work for
411 # everything we want ... 429 # everything we want ...
419 fi 437 fi
420 done 438 done
421 return 1 439 return 1
422} 440}
423 441
442# @FUNCTION: has_hardened
443# @DESCRIPTION:
424# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 444# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
425has_hardened() { 445has_hardened() {
426 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 446 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
427 447
428 test_version_info Hardened && return 0 448 test_version_info Hardened && return 0
429 # The specs file wont exist unless gcc has GCC_SPECS support 449 # The specs file wont exist unless gcc has GCC_SPECS support
430 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 450 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
431} 451}
432 452
453# @FUNCTION: has_pic
454# @DESCRIPTION:
433# DEPRECATED - use gcc-specs-pie from toolchain-funcs 455# DEPRECATED - use gcc-specs-pie from toolchain-funcs
434# indicate whether PIC is set 456# indicate whether PIC is set
435has_pic() { 457has_pic() {
436 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 458 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
437 459
438 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 460 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
439 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \ 461 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
440 gcc-specs-pie 462 gcc-specs-pie
441} 463}
442 464
465# @FUNCTION: has_pie
466# @DESCRIPTION:
443# DEPRECATED - use gcc-specs-pie from toolchain-funcs 467# DEPRECATED - use gcc-specs-pie from toolchain-funcs
444# indicate whether PIE is set 468# indicate whether PIE is set
445has_pie() { 469has_pie() {
446 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 470 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
447 471
448 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 472 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
449 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \ 473 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
450 gcc-specs-pie 474 gcc-specs-pie
451} 475}
452 476
477# @FUNCTION: has_ssp_all
478# @DESCRIPTION:
453# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 479# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
454# indicate whether code for SSP is being generated for all functions 480# indicate whether code for SSP is being generated for all functions
455has_ssp_all() { 481has_ssp_all() {
456 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 482 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
457 483
459 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 485 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
460 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 486 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
461 gcc-specs-ssp-all 487 gcc-specs-ssp-all
462} 488}
463 489
490# @FUNCTION: has_ssp
491# @DESCRIPTION:
464# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 492# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
465# indicate whether code for SSP is being generated 493# indicate whether code for SSP is being generated
466has_ssp() { 494has_ssp() {
467 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 495 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
468 496
470 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 498 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
471 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 499 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
472 gcc-specs-ssp 500 gcc-specs-ssp
473} 501}
474 502
503# @FUNCTION: has_m64
504# @DESCRIPTION:
505# This doesn't test if the flag is accepted, it tests if the flag actually
506# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
507# return code is 0, else the return code is 1.
475has_m64() { 508has_m64() {
476 # this doesnt test if the flag is accepted, it tests if the flag 509 # this doesnt test if the flag is accepted, it tests if the flag
477 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 510 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
478 # please dont replace this function with test_flag in some future 511 # please dont replace this function with test_flag in some future
479 # clean-up! 512 # clean-up!
486 rm -f "${temp}".c 519 rm -f "${temp}".c
487 [[ ${ret} != 1 ]] && return 0 520 [[ ${ret} != 1 ]] && return 0
488 return 1 521 return 1
489} 522}
490 523
524# @FUNCTION: has_m32
525# @DESCRIPTION:
526# This doesn't test if the flag is accepted, it tests if the flag actually
527# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
528# code is 0, else return code is 1.
491has_m32() { 529has_m32() {
492 # this doesnt test if the flag is accepted, it tests if the flag 530 # this doesnt test if the flag is accepted, it tests if the flag
493 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 531 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
494 # please dont replace this function with test_flag in some future 532 # please dont replace this function with test_flag in some future
495 # clean-up! 533 # clean-up!
504 rm -f "${temp}".c 542 rm -f "${temp}".c
505 [[ ${ret} != 1 ]] && return 0 543 [[ ${ret} != 1 ]] && return 0
506 return 1 544 return 1
507} 545}
508 546
547# @FUNCTION: replace-sparc64-flags
548# @DESCRIPTION:
549# Sets mcpu to v8 and uses the original value as mtune if none specified.
509replace-sparc64-flags() { 550replace-sparc64-flags() {
510 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 551 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
511 552
512 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 553 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
513 for x in ${SPARC64_CPUS}; do 554 for x in ${SPARC64_CPUS}; do
530 fi 571 fi
531 572
532 export CFLAGS CXXFLAGS 573 export CFLAGS CXXFLAGS
533} 574}
534 575
576# @FUNCTION: append-ldflags
577# @USAGE: <flags>
578# @DESCRIPTION:
579# Add extra <flags> to the current LDFLAGS.
535append-ldflags() { 580append-ldflags() {
536 [[ -z $* ]] && return 0 581 [[ -z $* ]] && return 0
582 local flag
583 for flag in "$@"; do
584 [[ ${flag} == -l* ]] && \
585 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
586 done
587
537 export LDFLAGS="${LDFLAGS} $*" 588 export LDFLAGS="${LDFLAGS} $*"
538 return 0 589 return 0
539} 590}
540 591
541# Remove flags from LDFLAGS - it's up to the ebuild to filter 592# @FUNCTION: filter-ldflags
542# CFLAGS and CXXFLAGS via filter-flags if they need to. 593# @USAGE: <flags>
594# @DESCRIPTION:
595# Remove particular <flags> from LDFLAGS. Accepts shell globs.
543filter-ldflags() { 596filter-ldflags() {
544 _filter-var LDFLAGS "$@" 597 _filter-var LDFLAGS "$@"
545 return 0 598 return 0
546} 599}
547 600
601# @FUNCTION: raw-ldflags
602# @USAGE: <flags>
603# @DESCRIPTION:
548# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 604# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
549# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 605# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
550# to gcc where it needs the '-Wl,'. 606# to gcc where it needs the '-Wl,'.
551raw-ldflags() { 607raw-ldflags() {
552 local x input="$@" 608 local x input="$@"
557 set -- "$@" ${x//,/ } 613 set -- "$@" ${x//,/ }
558 done 614 done
559 echo "$@" 615 echo "$@"
560} 616}
561 617
618# @FUNCTION: bindnow-flags
619# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
620# @DESCRIPTION:
562# Gets the flags needed for "NOW" binding 621# DEPRECATED - Gets the flags needed for "NOW" binding
563bindnow-flags() { 622bindnow-flags() {
623 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" >&2
624
564 case $($(tc-getLD) -v 2>&1 </dev/null) in 625 case $($(tc-getLD) -v 2>&1 </dev/null) in
565 *GNU* | *'with BFD'*) # GNU ld 626 *GNU* | *'with BFD'*) # GNU ld
566 echo "-Wl,-z,now" ;; 627 echo "-Wl,-z,now" ;;
567 *Apple*) # Darwin ld 628 *Apple*) # Darwin ld
568 echo "-bind_at_load" ;; 629 echo "-bind_at_load" ;;

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