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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 1.118 2007/03/24 07:07:18 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.163 2011/12/28 06:28:55 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() 13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15
8inherit eutils toolchain-funcs multilib 16inherit eutils toolchain-funcs multilib
9 17
10#
11#### filter-flags <flags> ####
12# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags
14#
15#### append-flags <flags> ####
16# Add extra flags to your current C[XX]FLAGS
17#
18#### replace-flags <orig.flag> <new.flag> ###
19# Replace a flag by another one
20#
21#### replace-cpu-flags <old.cpus> <new.cpu> ###
22# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu>
24#
25#### is-flag[q] <flag> ####
26# Returns "true" if flag is set in C[XX]FLAGS
27# Matches only complete a flag
28# q version sets return code but doesn't echo
29#
30#### is-ldflag[q] <flag> ####
31# Returns "true" if flag is set in LDFLAGS
32# Matches only complete a flag
33# q version sets return code but doesn't echo
34#
35#### strip-flags ####
36# Strip C[XX]FLAGS of everything except known
37# good options.
38#
39#### strip-unsupported-flags ####
40# Strip C[XX]FLAGS of any flags not supported by
41# installed version of gcc
42#
43#### get-flag <flag> ####
44# Find and echo the value for a particular flag
45#
46#### replace-sparc64-flags ####
47# Sets mcpu to v8 and uses the original value
48# as mtune if none specified.
49#
50#### filter-mfpmath <math types> ####
51# Remove specified math types from the fpmath specification
52# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
53# will leave the user with -mfpmath=386
54#
55#### append-ldflags ####
56# Add extra flags to your current LDFLAGS
57#
58#### filter-ldflags <flags> ####
59# Remove particular flags from LDFLAGS
60# Matches only complete flags
61#
62#### bindnow-flags ####
63# Returns the flags to enable "now" binding in the current selected linker.
64#
65################ DEPRECATED functions ################ 18################ DEPRECATED functions ################
66# The following are still present to avoid breaking existing 19# The following are still present to avoid breaking existing
67# code more than necessary; however they are deprecated. Please 20# code more than necessary; however they are deprecated. Please
68# use gcc-specs-* from toolchain-funcs.eclass instead, if you 21# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# need to know which hardened techs are active in the compiler. 22# need to know which hardened techs are active in the compiler.
70# See bug #100974 23# See bug #100974
71# 24#
72#### has_hardened #### 25# has_hardened
73# Returns true if the compiler has 'Hardened' in its version string, 26# has_pie
74# (note; switched-spec vanilla compilers satisfy this condition) or 27# has_pic
75# the specs file name contains 'hardened'.
76#
77#### has_pie ####
78# Returns true if the compiler by default or with current CFLAGS
79# builds position-independent code.
80#
81#### has_pic ####
82# Returns true if the compiler by default or with current CFLAGS
83# builds position-independent code.
84#
85#### has_ssp_all #### 28# has_ssp_all
86# Returns true if the compiler by default or with current CFLAGS 29# has_ssp
87# generates stack smash protections for all functions
88#
89#### has_ssp ####
90# Returns true if the compiler by default or with current CFLAGS
91# generates stack smash protections for most vulnerable functions
92#
93 30
31
94# C[XX]FLAGS that we allow in strip-flags 32# {C,CXX,F,FC}FLAGS that we allow in strip-flags
95# Note: shell globs and character lists are allowed 33# Note: shell globs and character lists are allowed
96setup-allowed-flags() { 34setup-allowed-flags() {
97 if [[ -z ${ALLOWED_FLAGS} ]] ; then
98 export ALLOWED_FLAGS="-pipe" 35 ALLOWED_FLAGS="-pipe"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 36 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 37 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 38 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 39 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+" 40 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
104 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 41 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
105 fi 42 ALLOWED_FLAGS+=" -W* -w"
43
106 # allow a bunch of flags that negate features / control ABI 44 # allow a bunch of flags that negate features / control ABI
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 45 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
46 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
47 -fno-omit-frame-pointer"
108 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 48 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
109 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 49 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
50 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
110 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 51 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
111 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 52 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
112 -mieee -mieee-with-inexact -mschedule \ 53 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
113 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 54 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
114 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 55 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
115 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 56 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
116 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 57 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
117 -msecure-plt -D*"
118 58
119 # C[XX]FLAGS that we are think is ok, but needs testing 59 # 4.5
120 # NOTE: currently -Os have issues with gcc3 and K6* arch's 60 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
121 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 61 # 4.6
62 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
63
64 export ALLOWED_FLAGS
122 return 0 65 return 0
123} 66}
124 67
125# inverted filters for hardened compiler. This is trying to unpick 68# inverted filters for hardened compiler. This is trying to unpick
126# the hardened compiler defaults. 69# the hardened compiler defaults.
134 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 77 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
135 gcc-specs-pie || continue 78 gcc-specs-pie || continue
136 is-flagq -nopie || append-flags -nopie;; 79 is-flagq -nopie || append-flags -nopie;;
137 -fstack-protector) 80 -fstack-protector)
138 gcc-specs-ssp || continue 81 gcc-specs-ssp || continue
139 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 82 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
140 -fstack-protector-all) 83 -fstack-protector-all)
141 gcc-specs-ssp-to-all || continue 84 gcc-specs-ssp-to-all || continue
142 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 85 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
86 -fno-strict-overflow)
87 gcc-specs-nostrict || continue
88 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
143 esac 89 esac
144 done 90 done
145} 91}
146 92
147# Remove occurrences of strings from variable given in $1 93# Remove occurrences of strings from variable given in $1
162 eval new\[\${\#new\[@]}]=\${f} 108 eval new\[\${\#new\[@]}]=\${f}
163 done 109 done
164 eval export ${VAR}=\${new\[*]} 110 eval export ${VAR}=\${new\[*]}
165} 111}
166 112
113# @FUNCTION: filter-flags
114# @USAGE: <flags>
115# @DESCRIPTION:
116# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
167filter-flags() { 117filter-flags() {
168 _filter-hardened "$@" 118 _filter-hardened "$@"
169 _filter-var CFLAGS "$@" 119 _filter-var CFLAGS "$@"
170 _filter-var CPPFLAGS "$@" 120 _filter-var CPPFLAGS "$@"
171 _filter-var CXXFLAGS "$@" 121 _filter-var CXXFLAGS "$@"
122 _filter-var FFLAGS "$@"
123 _filter-var FCFLAGS "$@"
172 return 0 124 return 0
173} 125}
174 126
127# @FUNCTION: filter-lfs-flags
128# @DESCRIPTION:
129# Remove flags that enable Large File Support.
175filter-lfs-flags() { 130filter-lfs-flags() {
176 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 131 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
132 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
133 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
134 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
135 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
177 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 136 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
178} 137}
179 138
139# @FUNCTION: append-cppflags
140# @USAGE: <flags>
141# @DESCRIPTION:
142# Add extra <flags> to the current CPPFLAGS.
180append-cppflags() { 143append-cppflags() {
181 [[ -z $* ]] && return 0 144 [[ $# -eq 0 ]] && return 0
182 export CPPFLAGS="${CPPFLAGS} $*" 145 export CPPFLAGS="${CPPFLAGS} $*"
183 return 0 146 return 0
184} 147}
185 148
149# @FUNCTION: append-cflags
150# @USAGE: <flags>
151# @DESCRIPTION:
152# Add extra <flags> to the current CFLAGS.
153append-cflags() {
154 [[ $# -eq 0 ]] && return 0
155 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
156 return 0
157}
158
159# @FUNCTION: append-cxxflags
160# @USAGE: <flags>
161# @DESCRIPTION:
162# Add extra <flags> to the current CXXFLAGS.
163append-cxxflags() {
164 [[ $# -eq 0 ]] && return 0
165 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
166 return 0
167}
168
169# @FUNCTION: append-fflags
170# @USAGE: <flags>
171# @DESCRIPTION:
172# Add extra <flags> to the current {F,FC}FLAGS.
173append-fflags() {
174 [[ $# -eq 0 ]] && return 0
175 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
176 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
177 return 0
178}
179
180# @FUNCTION: append-lfs-flags
181# @DESCRIPTION:
182# Add flags that enable Large File Support.
186append-lfs-flags() { 183append-lfs-flags() {
187 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 184 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
185 # see comments in filter-lfs-flags func for meaning of these
188 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 186 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
189} 187}
190 188
189# @FUNCTION: append-flags
190# @USAGE: <flags>
191# @DESCRIPTION:
192# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
191append-flags() { 193append-flags() {
192 [[ -z $* ]] && return 0 194 [[ $# -eq 0 ]] && return 0
193 export CFLAGS="${CFLAGS} $*" 195 append-cflags "$@"
194 export CXXFLAGS="${CXXFLAGS} $*" 196 append-cxxflags "$@"
197 append-fflags "$@"
195 return 0 198 return 0
196} 199}
197 200
201# @FUNCTION: replace-flags
202# @USAGE: <old> <new>
203# @DESCRIPTION:
204# Replace the <old> flag with <new>. Accepts shell globs for <old>.
198replace-flags() { 205replace-flags() {
199 [[ $# != 2 ]] \ 206 [[ $# != 2 ]] \
200 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 207 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
201 && die "replace-flags takes 2 arguments, not $#" 208 && die "replace-flags takes 2 arguments, not $#"
202 209
203 local f fset 210 local f fset
204 declare -a new_CFLAGS new_CXXFLAGS 211 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
205 212
206 for fset in CFLAGS CXXFLAGS; do 213 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
207 # Looping over the flags instead of using a global 214 # Looping over the flags instead of using a global
208 # substitution ensures that we're working with flag atoms. 215 # substitution ensures that we're working with flag atoms.
209 # Otherwise globs like -O* have the potential to wipe out the 216 # Otherwise globs like -O* have the potential to wipe out the
210 # list of flags. 217 # list of flags.
211 for f in ${!fset}; do 218 for f in ${!fset}; do
217 done 224 done
218 225
219 return 0 226 return 0
220} 227}
221 228
229# @FUNCTION: replace-cpu-flags
230# @USAGE: <old> <new>
231# @DESCRIPTION:
232# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
233# with flags that select the <new> cpu. Accepts shell globs for <old>.
222replace-cpu-flags() { 234replace-cpu-flags() {
223 local newcpu="$#" ; newcpu="${!newcpu}" 235 local newcpu="$#" ; newcpu="${!newcpu}"
224 while [ $# -gt 1 ] ; do 236 while [ $# -gt 1 ] ; do
225 # quote to make sure that no globbing is done (particularly on 237 # quote to make sure that no globbing is done (particularly on
226 # ${oldcpu}) prior to calling replace-flags 238 # ${oldcpu}) prior to calling replace-flags
238 [[ ${x} == $2 ]] && return 0 250 [[ ${x} == $2 ]] && return 0
239 done 251 done
240 return 1 252 return 1
241} 253}
242 254
255# @FUNCTION: is-flagq
256# @USAGE: <flag>
257# @DESCRIPTION:
258# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
243is-flagq() { 259is-flagq() {
244 [[ -n $2 ]] && die "Usage: is-flag <flag>" 260 [[ -n $2 ]] && die "Usage: is-flag <flag>"
245 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 261 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
246} 262}
247 263
264# @FUNCTION: is-flag
265# @USAGE: <flag>
266# @DESCRIPTION:
267# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
248is-flag() { 268is-flag() {
249 is-flagq "$@" && echo true 269 is-flagq "$@" && echo true
250} 270}
251 271
272# @FUNCTION: is-ldflagq
273# @USAGE: <flag>
274# @DESCRIPTION:
275# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
252is-ldflagq() { 276is-ldflagq() {
253 [[ -n $2 ]] && die "Usage: is-ldflag <flag>" 277 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
254 _is_flagq LDFLAGS $1 278 _is_flagq LDFLAGS $1
255} 279}
256 280
281# @FUNCTION: is-ldflag
282# @USAGE: <flag>
283# @DESCRIPTION:
284# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
257is-ldflag() { 285is-ldflag() {
258 is-ldflagq "$@" && echo true 286 is-ldflagq "$@" && echo true
259} 287}
260 288
289# @FUNCTION: filter-mfpmath
290# @USAGE: <math types>
291# @DESCRIPTION:
292# Remove specified math types from the fpmath flag. For example, if the user
293# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
294# -mfpmath=386.
261filter-mfpmath() { 295filter-mfpmath() {
262 local orig_mfpmath new_math prune_math 296 local orig_mfpmath new_math prune_math
263 297
264 # save the original -mfpmath flag 298 # save the original -mfpmath flag
265 orig_mfpmath=$(get-flag -mfpmath) 299 orig_mfpmath=$(get-flag -mfpmath)
284 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 318 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
285 fi 319 fi
286 return 0 320 return 0
287} 321}
288 322
323# @FUNCTION: strip-flags
324# @DESCRIPTION:
325# Strip C[XX]FLAGS of everything except known good/safe flags.
289strip-flags() { 326strip-flags() {
290 local x y flag NEW_CFLAGS NEW_CXXFLAGS 327 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
291 328
292 setup-allowed-flags 329 setup-allowed-flags
293 330
294 local NEW_CFLAGS="" 331 local NEW_CFLAGS=""
295 local NEW_CXXFLAGS="" 332 local NEW_CXXFLAGS=""
296 333 local NEW_FFLAGS=""
297 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 334 local NEW_FCFLAGS=""
298 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
299 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
300 fi
301 335
302 set -f # disable pathname expansion 336 set -f # disable pathname expansion
303 337
304 for x in ${CFLAGS}; do 338 for x in ${CFLAGS}; do
305 for y in ${ALLOWED_FLAGS}; do 339 for y in ${ALLOWED_FLAGS}; do
319 break 353 break
320 fi 354 fi
321 done 355 done
322 done 356 done
323 357
358 for x in ${FFLAGS}; do
359 for y in ${ALLOWED_FLAGS}; do
360 flag=${x%%=*}
361 if [ "${flag%%${y}}" = "" ] ; then
362 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
363 break
364 fi
365 done
366 done
367
368 for x in ${FCFLAGS}; do
369 for y in ${ALLOWED_FLAGS}; do
370 flag=${x%%=*}
371 if [ "${flag%%${y}}" = "" ] ; then
372 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
373 break
374 fi
375 done
376 done
377
324 # In case we filtered out all optimization flags fallback to -O2 378 # In case we filtered out all optimization flags fallback to -O2
325 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 379 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
326 NEW_CFLAGS="${NEW_CFLAGS} -O2" 380 NEW_CFLAGS="${NEW_CFLAGS} -O2"
327 fi 381 fi
328 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 382 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
329 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 383 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
330 fi 384 fi
385 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
386 NEW_FFLAGS="${NEW_FFLAGS} -O2"
387 fi
388 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
389 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
390 fi
331 391
332 set +f # re-enable pathname expansion 392 set +f # re-enable pathname expansion
333 393
334 export CFLAGS="${NEW_CFLAGS}" 394 export CFLAGS="${NEW_CFLAGS}"
335 export CXXFLAGS="${NEW_CXXFLAGS}" 395 export CXXFLAGS="${NEW_CXXFLAGS}"
396 export FFLAGS="${NEW_FFLAGS}"
397 export FCFLAGS="${NEW_FCFLAGS}"
336 return 0 398 return 0
337} 399}
338 400
339test-flag-PROG() { 401test-flag-PROG() {
340 local comp=$1 402 local comp=$1
341 local flags="$2" 403 local flags="$2"
342 404
343 [[ -z ${comp} || -z ${flags} ]] && \ 405 [[ -z ${comp} || -z ${flags} ]] && return 1
344 return 1
345 406
407 # use -c so we can test the assembler as well
346 local PROG=$(tc-get${comp}) 408 local PROG=$(tc-get${comp})
347 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 409 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
348 > /dev/null 2>&1 410 > /dev/null 2>&1
349} 411}
350 412
351# Returns true if C compiler support given flag 413# @FUNCTION: test-flag-CC
414# @USAGE: <flag>
415# @DESCRIPTION:
416# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
352test-flag-CC() { test-flag-PROG "CC" "$1"; } 417test-flag-CC() { test-flag-PROG "CC" "$1"; }
353 418
354# Returns true if C++ compiler support given flag 419# @FUNCTION: test-flag-CXX
420# @USAGE: <flag>
421# @DESCRIPTION:
422# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
355test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 423test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
424
425# @FUNCTION: test-flag-F77
426# @USAGE: <flag>
427# @DESCRIPTION:
428# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
429test-flag-F77() { test-flag-PROG "F77" "$1"; }
430
431# @FUNCTION: test-flag-FC
432# @USAGE: <flag>
433# @DESCRIPTION:
434# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
435test-flag-FC() { test-flag-PROG "FC" "$1"; }
356 436
357test-flags-PROG() { 437test-flags-PROG() {
358 local comp=$1 438 local comp=$1
359 local flags 439 local flags
360 local x 440 local x
361 441
362 shift 442 shift
363 443
364 [[ -z ${comp} ]] && return 1 444 [[ -z ${comp} ]] && return 1
365 445
366 x=""
367 for x in "$@" ; do 446 for x in "$@" ; do
368 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 447 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
369 done 448 done
370 449
371 echo "${flags}" 450 echo "${flags}"
372 451
373 # Just bail if we dont have any flags 452 # Just bail if we dont have any flags
374 [[ -n ${flags} ]] 453 [[ -n ${flags} ]]
375} 454}
376 455
377# Returns (echo's) the given flags supported by the C compiler 456# @FUNCTION: test-flags-CC
457# @USAGE: <flags>
458# @DESCRIPTION:
459# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
378test-flags-CC() { test-flags-PROG "CC" "$@"; } 460test-flags-CC() { test-flags-PROG "CC" "$@"; }
379 461
380# Returns (echo's) the given flags supported by the C++ compiler 462# @FUNCTION: test-flags-CXX
463# @USAGE: <flags>
464# @DESCRIPTION:
465# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
381test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 466test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
382 467
468# @FUNCTION: test-flags-F77
469# @USAGE: <flags>
470# @DESCRIPTION:
471# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
472test-flags-F77() { test-flags-PROG "F77" "$@"; }
473
474# @FUNCTION: test-flags-FC
475# @USAGE: <flags>
476# @DESCRIPTION:
477# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
478test-flags-FC() { test-flags-PROG "FC" "$@"; }
479
480# @FUNCTION: test-flags
481# @USAGE: <flags>
482# @DESCRIPTION:
383# Short-hand that should hopefully work for both C and C++ compiler, but 483# Short-hand that should hopefully work for both C and C++ compiler, but
384# its really only present due to the append-flags() abomination. 484# its really only present due to the append-flags() abomination.
385test-flags() { test-flags-CC "$@"; } 485test-flags() { test-flags-CC "$@"; }
386 486
387# Depriciated, use test-flags() 487# @FUNCTION: test_version_info
388test_flag() { 488# @USAGE: <version>
389 ewarn "test_flag: deprecated, please use test-flags()!" >&2 489# @DESCRIPTION:
390 490# Returns shell true if the current C compiler version matches <version>, else returns shell false.
391 test-flags-CC "$@" 491# Accepts shell globs.
392}
393
394test_version_info() { 492test_version_info() {
395 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 493 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
396 return 0 494 return 0
397 else 495 else
398 return 1 496 return 1
399 fi 497 fi
400} 498}
401 499
500# @FUNCTION: strip-unsupported-flags
501# @DESCRIPTION:
502# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
402strip-unsupported-flags() { 503strip-unsupported-flags() {
403 export CFLAGS=$(test-flags-CC ${CFLAGS}) 504 export CFLAGS=$(test-flags-CC ${CFLAGS})
404 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) 505 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
506 export FFLAGS=$(test-flags-F77 ${FFLAGS})
507 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
405} 508}
406 509
510# @FUNCTION: get-flag
511# @USAGE: <flag>
512# @DESCRIPTION:
513# Find and echo the value for a particular flag. Accepts shell globs.
407get-flag() { 514get-flag() {
408 local f findflag="$1" 515 local f findflag="$1"
409 516
410 # this code looks a little flaky but seems to work for 517 # this code looks a little flaky but seems to work for
411 # everything we want ... 518 # everything we want ...
412 # for example, if CFLAGS="-march=i686": 519 # for example, if CFLAGS="-march=i686":
413 # `get-flag -march` == "-march=i686" 520 # `get-flag -march` == "-march=i686"
414 # `get-flag march` == "i686" 521 # `get-flag march` == "i686"
415 for f in ${CFLAGS} ${CXXFLAGS} ; do 522 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
416 if [ "${f/${findflag}}" != "${f}" ] ; then 523 if [ "${f/${findflag}}" != "${f}" ] ; then
417 printf "%s\n" "${f/-${findflag}=}" 524 printf "%s\n" "${f/-${findflag}=}"
418 return 0 525 return 0
419 fi 526 fi
420 done 527 done
421 return 1 528 return 1
422} 529}
423 530
424# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 531# DEAD FUNCS. Remove by Dec 2011.
425has_hardened() { 532test_flag() { die "$0: deprecated, please use test-flags()!" ; }
426 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 533has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
427
428 test_version_info Hardened && return 0
429 # The specs file wont exist unless gcc has GCC_SPECS support
430 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
431}
432
433# DEPRECATED - use gcc-specs-pie from toolchain-funcs
434# indicate whether PIC is set
435has_pic() {
436 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 534has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
437
438 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
439 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
440 gcc-specs-pie
441}
442
443# DEPRECATED - use gcc-specs-pie from toolchain-funcs
444# indicate whether PIE is set
445has_pie() {
446 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 535has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
447
448 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
449 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
450 gcc-specs-pie
451}
452
453# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
454# indicate whether code for SSP is being generated for all functions
455has_ssp_all() {
456 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 536has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
457
458 # note; this matches only -fstack-protector-all
459 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
460 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
461 gcc-specs-ssp-all
462}
463
464# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
465# indicate whether code for SSP is being generated
466has_ssp() {
467 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 537has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
468 538
469 # note; this matches both -fstack-protector and -fstack-protector-all 539# @FUNCTION: has_m64
470 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 540# @DESCRIPTION:
471 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 541# This doesn't test if the flag is accepted, it tests if the flag actually
472 gcc-specs-ssp 542# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
473} 543# return code is 0, else the return code is 1.
474
475has_m64() { 544has_m64() {
476 # this doesnt test if the flag is accepted, it tests if the flag 545 # this doesnt test if the flag is accepted, it tests if the flag
477 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 546 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
478 # please dont replace this function with test_flag in some future 547 # please dont replace this function with test_flag in some future
479 # clean-up! 548 # clean-up!
486 rm -f "${temp}".c 555 rm -f "${temp}".c
487 [[ ${ret} != 1 ]] && return 0 556 [[ ${ret} != 1 ]] && return 0
488 return 1 557 return 1
489} 558}
490 559
560# @FUNCTION: has_m32
561# @DESCRIPTION:
562# This doesn't test if the flag is accepted, it tests if the flag actually
563# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
564# code is 0, else return code is 1.
491has_m32() { 565has_m32() {
492 # this doesnt test if the flag is accepted, it tests if the flag 566 # this doesnt test if the flag is accepted, it tests if the flag
493 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 567 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
494 # please dont replace this function with test_flag in some future 568 # please dont replace this function with test_flag in some future
495 # clean-up! 569 # clean-up!
504 rm -f "${temp}".c 578 rm -f "${temp}".c
505 [[ ${ret} != 1 ]] && return 0 579 [[ ${ret} != 1 ]] && return 0
506 return 1 580 return 1
507} 581}
508 582
583# @FUNCTION: replace-sparc64-flags
584# @DESCRIPTION:
585# Sets mcpu to v8 and uses the original value as mtune if none specified.
509replace-sparc64-flags() { 586replace-sparc64-flags() {
510 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 587 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
511 588
512 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 589 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
513 for x in ${SPARC64_CPUS}; do 590 for x in ${SPARC64_CPUS}; do
530 fi 607 fi
531 608
532 export CFLAGS CXXFLAGS 609 export CFLAGS CXXFLAGS
533} 610}
534 611
612# @FUNCTION: append-libs
613# @USAGE: <libs>
614# @DESCRIPTION:
615# Add extra <libs> to the current LIBS.
616append-libs() {
617 [[ $# -eq 0 ]] && return 0
618 local flag
619 for flag in "$@"; do
620 [[ ${flag} == -l* ]] && flag=${flag#-l}
621 export LIBS="${LIBS} -l${flag}"
622 done
623
624 return 0
625}
626
627# @FUNCTION: append-ldflags
628# @USAGE: <flags>
629# @DESCRIPTION:
630# Add extra <flags> to the current LDFLAGS.
535append-ldflags() { 631append-ldflags() {
536 [[ -z $* ]] && return 0 632 [[ $# -eq 0 ]] && return 0
633 local flag
634 for flag in "$@"; do
635 [[ ${flag} == -l* ]] && \
636 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
637 done
638
537 export LDFLAGS="${LDFLAGS} $*" 639 export LDFLAGS="${LDFLAGS} $*"
538 return 0 640 return 0
539} 641}
540 642
541# Remove flags from LDFLAGS - it's up to the ebuild to filter 643# @FUNCTION: filter-ldflags
542# CFLAGS and CXXFLAGS via filter-flags if they need to. 644# @USAGE: <flags>
645# @DESCRIPTION:
646# Remove particular <flags> from LDFLAGS. Accepts shell globs.
543filter-ldflags() { 647filter-ldflags() {
544 _filter-var LDFLAGS "$@" 648 _filter-var LDFLAGS "$@"
545 return 0 649 return 0
546} 650}
547 651
652# @FUNCTION: raw-ldflags
653# @USAGE: [flags]
654# @DESCRIPTION:
548# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 655# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
549# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 656# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
550# to gcc where it needs the '-Wl,'. 657# to gcc where it needs the '-Wl,'.
658#
659# If no flags are specified, then default to ${LDFLAGS}.
551raw-ldflags() { 660raw-ldflags() {
552 local x input="$@" 661 local x input="$@"
553 [[ -z ${input} ]] && input=${LDFLAGS} 662 [[ -z ${input} ]] && input=${LDFLAGS}
554 set -- 663 set --
555 for x in ${input} ; do 664 for x in ${input} ; do
557 set -- "$@" ${x//,/ } 666 set -- "$@" ${x//,/ }
558 done 667 done
559 echo "$@" 668 echo "$@"
560} 669}
561 670
562# Gets the flags needed for "NOW" binding 671# @FUNCTION: no-as-needed
563bindnow-flags() { 672# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
673no-as-needed() {
564 case $($(tc-getLD) -v 2>&1 </dev/null) in 674 case $($(tc-getLD) -v 2>&1 </dev/null) in
565 *GNU* | *'with BFD'*) # GNU ld 675 *GNU*) # GNU ld
566 echo "-Wl,-z,now" ;; 676 echo "-Wl,--no-as-needed" ;;
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 677 esac
577} 678}
578 679
579 680fi
580# Some tests for when we screw with things and want to make
581# sure we didn't break anything
582#TESTS() {
583# CFLAGS="-a -b -c=1"
584# CXXFLAGS="-x -y -z=2"
585# LDFLAGS="-l -m -n=3"
586#
587# die() { exit 1; }
588# (is-flag 1 2 3) && die
589# (is-ldflag 1 2 3) && die
590#
591# is-flagq -l && die
592# is-ldflagq -a && die
593# is-flagq -a || die
594# is-flagq -x || die
595# is-ldflagq -n=* || die
596# is-ldflagq -n && die
597#
598# strip-unsupported-flags
599# [[ ${CFLAGS} == "-c=1" ]] || die
600# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
601#
602# echo "All tests pass"
603#}
604#TESTS

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