/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.90 Revision 1.119
1# Copyright 1999-2005 Gentoo Foundation 1# Copyright 1999-2007 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 1.90 2005/07/11 19:28:20 agriffis Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.119 2007/05/12 11:45:51 vapier Exp $
4 4#
5# Maintainer: toolchain@gentoo.org
5 6
6# need access to emktemp() 7# need access to emktemp()
7inherit eutils toolchain-funcs multilib 8inherit eutils toolchain-funcs multilib
8 9
9# 10#
19# 20#
20#### replace-cpu-flags <old.cpus> <new.cpu> ### 21#### replace-cpu-flags <old.cpus> <new.cpu> ###
21# Replace march/mcpu flags that specify <old.cpus> 22# Replace march/mcpu flags that specify <old.cpus>
22# with flags that specify <new.cpu> 23# with flags that specify <new.cpu>
23# 24#
24#### is-flag <flag> #### 25#### is-flag[q] <flag> ####
25# Returns "true" if flag is set in C[XX]FLAGS 26# Returns "true" if flag is set in C[XX]FLAGS
26# Matches only complete a flag 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
27# 34#
28#### strip-flags #### 35#### strip-flags ####
29# Strip C[XX]FLAGS of everything except known 36# Strip C[XX]FLAGS of everything except known
30# good options. 37# good options.
31# 38#
50# 57#
51#### filter-ldflags <flags> #### 58#### filter-ldflags <flags> ####
52# Remove particular flags from LDFLAGS 59# Remove particular flags from LDFLAGS
53# Matches only complete flags 60# Matches only complete flags
54# 61#
55#### fstack-flags #### 62#### bindnow-flags ####
56# hooked function for hardened gcc that appends 63# Returns the flags to enable "now" binding in the current selected linker.
57# -fno-stack-protector to {C,CXX,LD}FLAGS 64#
58# when a package is filtering -fstack-protector, -fstack-protector-all 65################ DEPRECATED functions ################
59# notice: modern automatic specs files will also suppress -fstack-protector-all 66# The following are still present to avoid breaking existing
60# when only -fno-stack-protector is given 67# code more than necessary; however they are deprecated. Please
68# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# need to know which hardened techs are active in the compiler.
70# See bug #100974
71#
72#### has_hardened ####
73# Returns true if the compiler has 'Hardened' in its version string,
74# (note; switched-spec vanilla compilers satisfy this condition) or
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.
61# 80#
62#### has_pic #### 81#### has_pic ####
63# Returns true if the compiler by default or with current CFLAGS 82# Returns true if the compiler by default or with current CFLAGS
64# builds position-independent code. 83# builds position-independent code.
65# 84#
71# Returns true if the compiler by default or with current CFLAGS 90# Returns true if the compiler by default or with current CFLAGS
72# generates stack smash protections for most vulnerable functions 91# generates stack smash protections for most vulnerable functions
73# 92#
74 93
75# C[XX]FLAGS that we allow in strip-flags 94# C[XX]FLAGS that we allow in strip-flags
95# Note: shell globs and character lists are allowed
76setup-allowed-flags() { 96setup-allowed-flags() {
77 if [[ -z ${ALLOWED_FLAGS} ]] ; then 97 if [[ -z ${ALLOWED_FLAGS} ]] ; then
78 export ALLOWED_FLAGS="-pipe" 98 export ALLOWED_FLAGS="-pipe"
79 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking"
82 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
83 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
104 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
84 fi 105 fi
85 # allow a bunch of flags that negate features / control ABI 106 # allow a bunch of flags that negate features / control ABI
86 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
108 -fno-strict-aliasing -fno-bounds-checking"
87 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 109 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
88 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 110 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
89 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 111 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
90 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 112 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
91 -mieee -mieee-with-inexact \ 113 -mieee -mieee-with-inexact -mschedule \
114 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
92 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 115 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
93 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 116 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
94 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 117 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
118 -msecure-plt -D*"
95 119
96 # C[XX]FLAGS that we are think is ok, but needs testing 120 # C[XX]FLAGS that we are think is ok, but needs testing
97 # NOTE: currently -Os have issues with gcc3 and K6* arch's 121 # NOTE: currently -Os have issues with gcc3 and K6* arch's
98 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 122 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
99 return 0 123 return 0
124}
125
126# inverted filters for hardened compiler. This is trying to unpick
127# the hardened compiler defaults.
128_filter-hardened() {
129 local f
130 for f in "$@" ; do
131 case "${f}" in
132 # Ideally we should only concern ourselves with PIE flags,
133 # not -fPIC or -fpic, but too many places filter -fPIC without
134 # thinking about -fPIE.
135 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
136 gcc-specs-pie || continue
137 is-flagq -nopie || append-flags -nopie;;
138 -fstack-protector)
139 gcc-specs-ssp || continue
140 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
141 -fstack-protector-all)
142 gcc-specs-ssp-to-all || continue
143 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
144 esac
145 done
146}
147
148# Remove occurrences of strings from variable given in $1
149# Strings removed are matched as globs, so for example
150# '-O*' would remove -O1, -O2 etc.
151_filter-var() {
152 local f x VAR VAL
153 declare -a new
154
155 VAR=$1
156 shift
157 eval VAL=\${${VAR}}
158 for f in ${VAL}; do
159 for x in "$@"; do
160 # Note this should work with globs like -O*
161 [[ ${f} == ${x} ]] && continue 2
162 done
163 eval new\[\${\#new\[@]}]=\${f}
164 done
165 eval export ${VAR}=\${new\[*]}
100} 166}
101 167
102filter-flags() { 168filter-flags() {
103 local x f fset 169 _filter-hardened "$@"
104 declare -a new_CFLAGS new_CXXFLAGS 170 _filter-var CFLAGS "$@"
105 171 _filter-var CPPFLAGS "$@"
106 for x in "$@" ; do 172 _filter-var CXXFLAGS "$@"
107 case "${x}" in
108 -fPIC|-fpic|-fPIE|-fpie|-pie)
109 append-flags `test_flag -fno-pie`;;
110 -fstack-protector|-fstack-protector-all)
111 fstack-flags;;
112 esac
113 done
114
115 for fset in CFLAGS CXXFLAGS; do
116 # Looping over the flags instead of using a global
117 # substitution ensures that we're working with flag atoms.
118 # Otherwise globs like -O* have the potential to wipe out the
119 # list of flags.
120 for f in ${!fset}; do
121 for x in "$@"; do
122 # Note this should work with globs like -O*
123 [[ ${f} == ${x} ]] && continue 2
124 done
125 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
126 done
127 eval export ${fset}=\${new_${fset}\[*]}
128 done
129
130 return 0 173 return 0
131} 174}
132 175
133filter-lfs-flags() { 176filter-lfs-flags() {
177 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
134 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 178 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
135} 179}
136 180
181append-cppflags() {
182 [[ -z $* ]] && return 0
183 export CPPFLAGS="${CPPFLAGS} $*"
184 return 0
185}
186
137append-lfs-flags() { 187append-lfs-flags() {
188 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
138 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 189 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
139} 190}
140 191
141append-flags() { 192append-flags() {
142 [[ -z $* ]] && return 0 193 [[ -z $* ]] && return 0
143 export CFLAGS="${CFLAGS} $*" 194 export CFLAGS="${CFLAGS} $*"
144 export CXXFLAGS="${CXXFLAGS} $*" 195 export CXXFLAGS="${CXXFLAGS} $*"
145 [ -n "`is-flag -fno-stack-protector`" -o \
146 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
147 return 0 196 return 0
148} 197}
149 198
150replace-flags() { 199replace-flags() {
200 [[ $# != 2 ]] \
201 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
202 && die "replace-flags takes 2 arguments, not $#"
203
151 local f fset 204 local f fset
152 declare -a new_CFLAGS new_CXXFLAGS 205 declare -a new_CFLAGS new_CXXFLAGS
153 206
154 for fset in CFLAGS CXXFLAGS; do 207 for fset in CFLAGS CXXFLAGS; do
155 # Looping over the flags instead of using a global 208 # Looping over the flags instead of using a global
169 222
170replace-cpu-flags() { 223replace-cpu-flags() {
171 local newcpu="$#" ; newcpu="${!newcpu}" 224 local newcpu="$#" ; newcpu="${!newcpu}"
172 while [ $# -gt 1 ] ; do 225 while [ $# -gt 1 ] ; do
173 # quote to make sure that no globbing is done (particularly on 226 # quote to make sure that no globbing is done (particularly on
174 # ${oldcpu} prior to calling replace-flags 227 # ${oldcpu}) prior to calling replace-flags
175 replace-flags "-march=${1}" "-march=${newcpu}" 228 replace-flags "-march=${1}" "-march=${newcpu}"
176 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 229 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
177 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 230 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
178 shift 231 shift
179 done 232 done
180 return 0 233 return 0
181} 234}
182 235
236_is_flagq() {
237 local x
238 for x in ${!1} ; do
239 [[ ${x} == $2 ]] && return 0
240 done
241 return 1
242}
243
244is-flagq() {
245 [[ -n $2 ]] && die "Usage: is-flag <flag>"
246 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1
247}
248
183is-flag() { 249is-flag() {
184 local x 250 is-flagq "$@" && echo true
251}
185 252
186 for x in ${CFLAGS} ${CXXFLAGS} ; do 253is-ldflagq() {
187 # Note this should work with globs like -mcpu=ultrasparc* 254 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
188 if [[ ${x} == ${1} ]]; then 255 _is_flagq LDFLAGS $1
189 echo true 256}
190 return 0 257
191 fi 258is-ldflag() {
192 done 259 is-ldflagq "$@" && echo true
193 return 1
194} 260}
195 261
196filter-mfpmath() { 262filter-mfpmath() {
197 local orig_mfpmath new_math prune_math 263 local orig_mfpmath new_math prune_math
198 264
199 # save the original -mfpmath flag 265 # save the original -mfpmath flag
200 orig_mfpmath="`get-flag -mfpmath`" 266 orig_mfpmath=$(get-flag -mfpmath)
201 # get the value of the current -mfpmath flag 267 # get the value of the current -mfpmath flag
202 new_math=" `get-flag mfpmath | tr , ' '` " 268 new_math=$(get-flag mfpmath)
269 new_math=" ${new_math//,/ } "
203 # figure out which math values are to be removed 270 # figure out which math values are to be removed
204 prune_math="" 271 prune_math=""
205 for prune_math in "$@" ; do 272 for prune_math in "$@" ; do
206 new_math="${new_math/ ${prune_math} / }" 273 new_math=${new_math/ ${prune_math} / }
207 done 274 done
208 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 275 new_math=$(echo ${new_math})
276 new_math=${new_math// /,}
209 277
210 if [ -z "${new_math}" ] ; then 278 if [[ -z ${new_math} ]] ; then
211 # if we're removing all user specified math values are 279 # if we're removing all user specified math values are
212 # slated for removal, then we just filter the flag 280 # slated for removal, then we just filter the flag
213 filter-flags ${orig_mfpmath} 281 filter-flags ${orig_mfpmath}
214 else 282 else
215 # if we only want to filter some of the user specified 283 # if we only want to filter some of the user specified
267 export CFLAGS="${NEW_CFLAGS}" 335 export CFLAGS="${NEW_CFLAGS}"
268 export CXXFLAGS="${NEW_CXXFLAGS}" 336 export CXXFLAGS="${NEW_CXXFLAGS}"
269 return 0 337 return 0
270} 338}
271 339
340test-flag-PROG() {
341 local comp=$1
342 local flags="$2"
343
344 [[ -z ${comp} || -z ${flags} ]] && \
345 return 1
346
347 local PROG=$(tc-get${comp})
348 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
349 > /dev/null 2>&1
350}
351
352# Returns true if C compiler support given flag
353test-flag-CC() { test-flag-PROG "CC" "$1"; }
354
355# Returns true if C++ compiler support given flag
356test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
357
358test-flags-PROG() {
359 local comp=$1
360 local flags
361 local x
362
363 shift
364
365 [[ -z ${comp} ]] && return 1
366
367 x=""
368 for x in "$@" ; do
369 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
370 done
371
372 echo "${flags}"
373
374 # Just bail if we dont have any flags
375 [[ -n ${flags} ]]
376}
377
378# Returns (echo's) the given flags supported by the C compiler
379test-flags-CC() { test-flags-PROG "CC" "$@"; }
380
381# Returns (echo's) the given flags supported by the C++ compiler
382test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
383
384# Short-hand that should hopefully work for both C and C++ compiler, but
385# its really only present due to the append-flags() abomination.
386test-flags() { test-flags-CC "$@"; }
387
388# Depriciated, use test-flags()
272test_flag() { 389test_flag() {
273 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 390 ewarn "test_flag: deprecated, please use test-flags()!" >&2
274 printf "%s\n" "$*" 391
275 return 0 392 test-flags-CC "$@"
276 fi
277 return 1
278} 393}
279 394
280test_version_info() { 395test_version_info() {
281 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 396 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
282 return 0 397 return 0
284 return 1 399 return 1
285 fi 400 fi
286} 401}
287 402
288strip-unsupported-flags() { 403strip-unsupported-flags() {
289 local NEW_CFLAGS NEW_CXXFLAGS 404 export CFLAGS=$(test-flags-CC ${CFLAGS})
290 405 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
291 for x in ${CFLAGS} ; do
292 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
293 done
294 for x in ${CXXFLAGS} ; do
295 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
296 done
297
298 export CFLAGS="${NEW_CFLAGS}"
299 export CXXFLAGS="${NEW_CXXFLAGS}"
300} 406}
301 407
302get-flag() { 408get-flag() {
303 local f findflag="$1" 409 local f findflag="$1"
304 410
314 fi 420 fi
315 done 421 done
316 return 1 422 return 1
317} 423}
318 424
425# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
319has_hardened() { 426has_hardened() {
427 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
428
320 test_version_info Hardened && return 0 429 test_version_info Hardened && return 0
321 # the specs file wont exist unless gcc has GCC_SPECS support 430 # The specs file wont exist unless gcc has GCC_SPECS support
322 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 431 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
323 return 0
324 return 1
325} 432}
326 433
434# DEPRECATED - use gcc-specs-pie from toolchain-funcs
327# indicate whether PIC is set 435# indicate whether PIC is set
328has_pic() { 436has_pic() {
329 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 437 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
330 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
331 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
332 return 1
333}
334 438
439 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
440 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
441 gcc-specs-pie
442}
443
444# DEPRECATED - use gcc-specs-pie from toolchain-funcs
335# indicate whether PIE is set 445# indicate whether PIE is set
336has_pie() { 446has_pie() {
337 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 447 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
338 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
339 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
340 # test PIC while waiting for specs to be updated to generate __PIE__
341 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
342 return 1
343}
344 448
449 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
450 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
451 gcc-specs-pie
452}
453
454# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
345# indicate whether code for SSP is being generated for all functions 455# indicate whether code for SSP is being generated for all functions
346has_ssp_all() { 456has_ssp_all() {
457 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
458
347 # note; this matches only -fstack-protector-all 459 # note; this matches only -fstack-protector-all
348 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0 460 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
349 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0 461 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
350 return 1 462 gcc-specs-ssp-all
351} 463}
352 464
465# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
353# indicate whether code for SSP is being generated 466# indicate whether code for SSP is being generated
354has_ssp() { 467has_ssp() {
468 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
469
355 # note; this matches both -fstack-protector and -fstack-protector-all 470 # note; this matches both -fstack-protector and -fstack-protector-all
356 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 471 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
357 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0 472 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
358 return 1 473 gcc-specs-ssp
359} 474}
360 475
361has_m64() { 476has_m64() {
362 # this doesnt test if the flag is accepted, it tests if the flag 477 # this doesnt test if the flag is accepted, it tests if the flag
363 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 478 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
364 # please dont replace this function with test_flag in some future 479 # please dont replace this function with test_flag in some future
365 # clean-up! 480 # clean-up!
481
366 local temp="$(emktemp)" 482 local temp="$(emktemp)"
367 echo "int main() { return(0); }" > ${temp}.c 483 echo "int main() { return(0); }" > "${temp}".c
368 MY_CC=$(tc-getCC) 484 MY_CC=$(tc-getCC)
369 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 485 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
370 local ret=$? 486 local ret=$?
371 rm -f ${temp}.c 487 rm -f "${temp}".c
372 [ "$ret" != "1" ] && return 0 488 [[ ${ret} != 1 ]] && return 0
373 return 1 489 return 1
374} 490}
375 491
376has_m32() { 492has_m32() {
377 # this doesnt test if the flag is accepted, it tests if the flag 493 # this doesnt test if the flag is accepted, it tests if the flag
379 # please dont replace this function with test_flag in some future 495 # please dont replace this function with test_flag in some future
380 # clean-up! 496 # clean-up!
381 497
382 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0 498 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
383 499
384 local temp="$(emktemp)" 500 local temp=$(emktemp)
385 echo "int main() { return(0); }" > ${temp}.c 501 echo "int main() { return(0); }" > "${temp}".c
386 MY_CC=$(tc-getCC) 502 MY_CC=$(tc-getCC)
387 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 503 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
388 local ret=$? 504 local ret=$?
389 rm -f ${temp}.c 505 rm -f "${temp}".c
390 [ "$ret" != "1" ] && return 0 506 [[ ${ret} != 1 ]] && return 0
391 return 1 507 return 1
392} 508}
393 509
394replace-sparc64-flags() { 510replace-sparc64-flags() {
395 local SPARC64_CPUS="ultrasparc v9" 511 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
396 512
397 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 513 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
398 for x in ${SPARC64_CPUS}; do 514 for x in ${SPARC64_CPUS}; do
399 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 515 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
400 done 516 done
401 else 517 else
402 for x in ${SPARC64_CPUS}; do 518 for x in ${SPARC64_CPUS}; do
403 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 519 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
404 done 520 done
405 fi 521 fi
406 522
407 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 523 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
408 for x in ${SPARC64_CPUS}; do 524 for x in ${SPARC64_CPUS}; do
409 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 525 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
410 done 526 done
411 else 527 else
412 for x in ${SPARC64_CPUS}; do 528 for x in ${SPARC64_CPUS}; do
413 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 529 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
414 done 530 done
415 fi 531 fi
416 532
417 export CFLAGS CXXFLAGS 533 export CFLAGS CXXFLAGS
418} 534}
419 535
420append-ldflags() { 536append-ldflags() {
537 [[ -z $* ]] && return 0
421 export LDFLAGS="${LDFLAGS} $*" 538 export LDFLAGS="${LDFLAGS} $*"
422 return 0 539 return 0
423} 540}
424 541
542# Remove flags from LDFLAGS - it's up to the ebuild to filter
543# CFLAGS and CXXFLAGS via filter-flags if they need to.
425filter-ldflags() { 544filter-ldflags() {
426 local x 545 _filter-var LDFLAGS "$@"
546 return 0
547}
427 548
428 # we do this fancy spacing stuff so as to not filter 549# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
429 # out part of a flag ... we want flag atoms ! :D 550# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
430 LDFLAGS=" ${LDFLAGS} " 551# to gcc where it needs the '-Wl,'.
552raw-ldflags() {
553 local x input="$@"
554 [[ -z ${input} ]] && input=${LDFLAGS}
555 set --
431 for x in "$@" ; do 556 for x in ${input} ; do
432 LDFLAGS=${LDFLAGS// ${x} / } 557 x=${x#-Wl,}
558 set -- "$@" ${x//,/ }
433 done 559 done
434 [[ -z ${LDFLAGS// } ]] \ 560 echo "$@"
435 && LDFLAGS="" \
436 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
437 export LDFLAGS
438 return 0
439} 561}
440 562
441fstack-flags() { 563# Gets the flags needed for "NOW" binding
442 if has_ssp; then 564bindnow-flags() {
443 [ -z "`is-flag -fno-stack-protector`" ] && 565 case $($(tc-getLD) -v 2>&1 </dev/null) in
444 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 566 *GNU* | *'with BFD'*) # GNU ld
445 fi 567 echo "-Wl,-z,now" ;;
446 return 0 568 *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
447} 578}
448 579
449# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
450# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
451# fixes.
452#
453# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
454gcc2-flags() {
455 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
456 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
457 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
458 fi
459 580
460 replace-cpu-flags k6-{2,3} k6 581# Some tests for when we screw with things and want to make
461 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686 582# sure we didn't break anything
462 583#TESTS() {
463 replace-cpu-flags pentium-mmx i586 584# CFLAGS="-a -b -c=1"
464 replace-cpu-flags pentium{2,3,4} i686 585# CXXFLAGS="-x -y -z=2"
465 586# LDFLAGS="-l -m -n=3"
466 replace-cpu-flags ev6{7,8} ev6 587#
467 588# die() { exit 1; }
468 export CFLAGS CXXFLAGS 589# (is-flag 1 2 3) && die
469} 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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