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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 1.148 2010/05/08 03:47:41 dirtyepic Exp $
4# 4
5# @ECLASS: flag-o-matic.eclass
6# @MAINTAINER:
5# Maintainer: toolchain@gentoo.org 7# toolchain@gentoo.org
8# @BLURB: common functions to manipulate and query toolchain flags
9# @DESCRIPTION:
10# This eclass contains a suite of functions to help developers sanely
11# and safely manage toolchain flags in their builds.
6 12
7# need access to emktemp()
8inherit eutils toolchain-funcs multilib 13inherit eutils toolchain-funcs multilib
9 14
10#
11#### filter-flags <flags> ####
12# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags
14#
15#### append-flags <flags> ####
16# Add extra flags to your current C[XX]FLAGS
17#
18#### replace-flags <orig.flag> <new.flag> ###
19# Replace a flag by another one
20#
21#### replace-cpu-flags <old.cpus> <new.cpu> ###
22# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu>
24#
25#### is-flag[q] <flag> ####
26# Returns "true" if flag is set in C[XX]FLAGS
27# Matches only complete a flag
28# q version sets return code but doesn't echo
29#
30#### is-ldflag[q] <flag> ####
31# Returns "true" if flag is set in LDFLAGS
32# Matches only complete a flag
33# q version sets return code but doesn't echo
34#
35#### strip-flags ####
36# Strip C[XX]FLAGS of everything except known
37# good options.
38#
39#### strip-unsupported-flags ####
40# Strip C[XX]FLAGS of any flags not supported by
41# installed version of gcc
42#
43#### get-flag <flag> ####
44# Find and echo the value for a particular flag
45#
46#### replace-sparc64-flags ####
47# Sets mcpu to v8 and uses the original value
48# as mtune if none specified.
49#
50#### filter-mfpmath <math types> ####
51# Remove specified math types from the fpmath specification
52# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
53# will leave the user with -mfpmath=386
54#
55#### append-ldflags ####
56# Add extra flags to your current LDFLAGS
57#
58#### filter-ldflags <flags> ####
59# Remove particular flags from LDFLAGS
60# Matches only complete flags
61#
62#### bindnow-flags ####
63# Returns the flags to enable "now" binding in the current selected linker.
64#
65################ DEPRECATED functions ################ 15################ DEPRECATED functions ################
66# The following are still present to avoid breaking existing 16# The following are still present to avoid breaking existing
67# code more than necessary; however they are deprecated. Please 17# code more than necessary; however they are deprecated. Please
68# use gcc-specs-* from toolchain-funcs.eclass instead, if you 18# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# need to know which hardened techs are active in the compiler. 19# need to know which hardened techs are active in the compiler.
70# See bug #100974 20# See bug #100974
71# 21#
72#### has_hardened #### 22# has_hardened
73# Returns true if the compiler has 'Hardened' in its version string, 23# has_pie
74# (note; switched-spec vanilla compilers satisfy this condition) or 24# has_pic
75# the specs file name contains 'hardened'.
76#
77#### has_pie ####
78# Returns true if the compiler by default or with current CFLAGS
79# builds position-independent code.
80#
81#### has_pic ####
82# Returns true if the compiler by default or with current CFLAGS
83# builds position-independent code.
84#
85#### has_ssp_all #### 25# has_ssp_all
86# Returns true if the compiler by default or with current CFLAGS 26# has_ssp
87# generates stack smash protections for all functions
88#
89#### has_ssp ####
90# Returns true if the compiler by default or with current CFLAGS
91# generates stack smash protections for most vulnerable functions
92#
93 27
28
94# C[XX]FLAGS that we allow in strip-flags 29# {C,CXX,F,FC}FLAGS that we allow in strip-flags
95# Note: shell globs and character lists are allowed 30# Note: shell globs and character lists are allowed
96setup-allowed-flags() { 31setup-allowed-flags() {
97 if [[ -z ${ALLOWED_FLAGS} ]] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
98 export ALLOWED_FLAGS="-pipe" 33 export ALLOWED_FLAGS="-pipe"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -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-ssse3 -mno-sse4 -mno-sse4.1 \
47 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
48 -mno-popcnt -mno-abm \
110 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
111 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
112 -mieee -mieee-with-inexact -mschedule \ 51 -mieee -mieee-with-inexact -mschedule \
113 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
114 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
115 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 54 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
116 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
117 -msecure-plt -D*" 56 -msecure-plt -m*-toc -D* -U*"
118 57
58 # 4.5
59 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60
119 # C[XX]FLAGS that we are think is ok, but needs testing 61 # {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 62 # NOTE: currently -Os have issues with gcc3 and K6* arch's
121 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 63 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
122 return 0 64 return 0
123} 65}
124 66
134 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 76 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
135 gcc-specs-pie || continue 77 gcc-specs-pie || continue
136 is-flagq -nopie || append-flags -nopie;; 78 is-flagq -nopie || append-flags -nopie;;
137 -fstack-protector) 79 -fstack-protector)
138 gcc-specs-ssp || continue 80 gcc-specs-ssp || continue
139 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 81 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
140 -fstack-protector-all) 82 -fstack-protector-all)
141 gcc-specs-ssp-to-all || continue 83 gcc-specs-ssp-to-all || continue
142 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 84 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
85 -fno-strict-overflow)
86 gcc-specs-nostrict || continue
87 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
143 esac 88 esac
144 done 89 done
145} 90}
146 91
147# Remove occurrences of strings from variable given in $1 92# Remove occurrences of strings from variable given in $1
162 eval new\[\${\#new\[@]}]=\${f} 107 eval new\[\${\#new\[@]}]=\${f}
163 done 108 done
164 eval export ${VAR}=\${new\[*]} 109 eval export ${VAR}=\${new\[*]}
165} 110}
166 111
112# @FUNCTION: filter-flags
113# @USAGE: <flags>
114# @DESCRIPTION:
115# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
167filter-flags() { 116filter-flags() {
168 _filter-hardened "$@" 117 _filter-hardened "$@"
169 _filter-var CFLAGS "$@" 118 _filter-var CFLAGS "$@"
170 _filter-var CPPFLAGS "$@" 119 _filter-var CPPFLAGS "$@"
171 _filter-var CXXFLAGS "$@" 120 _filter-var CXXFLAGS "$@"
121 _filter-var FFLAGS "$@"
122 _filter-var FCFLAGS "$@"
172 return 0 123 return 0
173} 124}
174 125
126# @FUNCTION: filter-lfs-flags
127# @DESCRIPTION:
128# Remove flags that enable Large File Support.
175filter-lfs-flags() { 129filter-lfs-flags() {
176 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 130 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
177 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 131 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
178} 132}
179 133
134# @FUNCTION: append-cppflags
135# @USAGE: <flags>
136# @DESCRIPTION:
137# Add extra <flags> to the current CPPFLAGS.
180append-cppflags() { 138append-cppflags() {
181 [[ -z $* ]] && return 0 139 [[ -z $* ]] && return 0
182 export CPPFLAGS="${CPPFLAGS} $*" 140 export CPPFLAGS="${CPPFLAGS} $*"
183 return 0 141 return 0
184} 142}
185 143
144# @FUNCTION: append-cflags
145# @USAGE: <flags>
146# @DESCRIPTION:
147# Add extra <flags> to the current CFLAGS.
148append-cflags() {
149 [[ -z $* ]] && return 0
150 export CFLAGS="${CFLAGS} $*"
151 return 0
152}
153
154# @FUNCTION: append-cxxflags
155# @USAGE: <flags>
156# @DESCRIPTION:
157# Add extra <flags> to the current CXXFLAGS.
158append-cxxflags() {
159 [[ -z $* ]] && return 0
160 export CXXFLAGS="${CXXFLAGS} $*"
161 return 0
162}
163
164# @FUNCTION: append-fflags
165# @USAGE: <flags>
166# @DESCRIPTION:
167# Add extra <flags> to the current {F,FC}FLAGS.
168append-fflags() {
169 [[ -z $* ]] && return 0
170 export FFLAGS="${FFLAGS} $*"
171 export FCFLAGS="${FCFLAGS} $*"
172 return 0
173}
174
175# @FUNCTION: append-lfs-flags
176# @DESCRIPTION:
177# Add flags that enable Large File Support.
186append-lfs-flags() { 178append-lfs-flags() {
187 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 179 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
188 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 180 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
189} 181}
190 182
183# @FUNCTION: append-flags
184# @USAGE: <flags>
185# @DESCRIPTION:
186# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
191append-flags() { 187append-flags() {
192 [[ -z $* ]] && return 0 188 [[ -z $* ]] && return 0
193 export CFLAGS="${CFLAGS} $*" 189 append-cflags "$@"
194 export CXXFLAGS="${CXXFLAGS} $*" 190 append-cxxflags "$@"
191 append-fflags "$@"
195 return 0 192 return 0
196} 193}
197 194
195# @FUNCTION: replace-flags
196# @USAGE: <old> <new>
197# @DESCRIPTION:
198# Replace the <old> flag with <new>. Accepts shell globs for <old>.
198replace-flags() { 199replace-flags() {
199 [[ $# != 2 ]] \ 200 [[ $# != 2 ]] \
200 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 201 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
201 && die "replace-flags takes 2 arguments, not $#" 202 && die "replace-flags takes 2 arguments, not $#"
202 203
203 local f fset 204 local f fset
204 declare -a new_CFLAGS new_CXXFLAGS 205 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
205 206
206 for fset in CFLAGS CXXFLAGS; do 207 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
207 # Looping over the flags instead of using a global 208 # Looping over the flags instead of using a global
208 # substitution ensures that we're working with flag atoms. 209 # substitution ensures that we're working with flag atoms.
209 # Otherwise globs like -O* have the potential to wipe out the 210 # Otherwise globs like -O* have the potential to wipe out the
210 # list of flags. 211 # list of flags.
211 for f in ${!fset}; do 212 for f in ${!fset}; do
217 done 218 done
218 219
219 return 0 220 return 0
220} 221}
221 222
223# @FUNCTION: replace-cpu-flags
224# @USAGE: <old> <new>
225# @DESCRIPTION:
226# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
227# with flags that select the <new> cpu. Accepts shell globs for <old>.
222replace-cpu-flags() { 228replace-cpu-flags() {
223 local newcpu="$#" ; newcpu="${!newcpu}" 229 local newcpu="$#" ; newcpu="${!newcpu}"
224 while [ $# -gt 1 ] ; do 230 while [ $# -gt 1 ] ; do
225 # quote to make sure that no globbing is done (particularly on 231 # quote to make sure that no globbing is done (particularly on
226 # ${oldcpu}) prior to calling replace-flags 232 # ${oldcpu}) prior to calling replace-flags
238 [[ ${x} == $2 ]] && return 0 244 [[ ${x} == $2 ]] && return 0
239 done 245 done
240 return 1 246 return 1
241} 247}
242 248
249# @FUNCTION: is-flagq
250# @USAGE: <flag>
251# @DESCRIPTION:
252# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
243is-flagq() { 253is-flagq() {
244 [[ -n $2 ]] && die "Usage: is-flag <flag>" 254 [[ -n $2 ]] && die "Usage: is-flag <flag>"
245 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 255 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
246} 256}
247 257
258# @FUNCTION: is-flag
259# @USAGE: <flag>
260# @DESCRIPTION:
261# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
248is-flag() { 262is-flag() {
249 is-flagq "$@" && echo true 263 is-flagq "$@" && echo true
250} 264}
251 265
266# @FUNCTION: is-ldflagq
267# @USAGE: <flag>
268# @DESCRIPTION:
269# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
252is-ldflagq() { 270is-ldflagq() {
253 [[ -n $2 ]] && die "Usage: is-ldflag <flag>" 271 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
254 _is_flagq LDFLAGS $1 272 _is_flagq LDFLAGS $1
255} 273}
256 274
275# @FUNCTION: is-ldflag
276# @USAGE: <flag>
277# @DESCRIPTION:
278# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
257is-ldflag() { 279is-ldflag() {
258 is-ldflagq "$@" && echo true 280 is-ldflagq "$@" && echo true
259} 281}
260 282
283# @FUNCTION: filter-mfpmath
284# @USAGE: <math types>
285# @DESCRIPTION:
286# Remove specified math types from the fpmath flag. For example, if the user
287# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
288# -mfpmath=386.
261filter-mfpmath() { 289filter-mfpmath() {
262 local orig_mfpmath new_math prune_math 290 local orig_mfpmath new_math prune_math
263 291
264 # save the original -mfpmath flag 292 # save the original -mfpmath flag
265 orig_mfpmath=$(get-flag -mfpmath) 293 orig_mfpmath=$(get-flag -mfpmath)
284 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 312 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
285 fi 313 fi
286 return 0 314 return 0
287} 315}
288 316
317# @FUNCTION: strip-flags
318# @DESCRIPTION:
319# Strip C[XX]FLAGS of everything except known good/safe flags.
289strip-flags() { 320strip-flags() {
290 local x y flag NEW_CFLAGS NEW_CXXFLAGS 321 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
291 322
292 setup-allowed-flags 323 setup-allowed-flags
293 324
294 local NEW_CFLAGS="" 325 local NEW_CFLAGS=""
295 local NEW_CXXFLAGS="" 326 local NEW_CXXFLAGS=""
327 local NEW_FFLAGS=""
328 local NEW_FCFLAGS=""
296 329
297 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 330 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
298 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 331 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
299 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 332 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
300 fi 333 fi
301 334
302 set -f # disable pathname expansion 335 set -f # disable pathname expansion
303 336
319 break 352 break
320 fi 353 fi
321 done 354 done
322 done 355 done
323 356
357 for x in ${FFLAGS}; do
358 for y in ${ALLOWED_FLAGS}; do
359 flag=${x%%=*}
360 if [ "${flag%%${y}}" = "" ] ; then
361 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
362 break
363 fi
364 done
365 done
366
367 for x in ${FCFLAGS}; do
368 for y in ${ALLOWED_FLAGS}; do
369 flag=${x%%=*}
370 if [ "${flag%%${y}}" = "" ] ; then
371 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
372 break
373 fi
374 done
375 done
376
324 # In case we filtered out all optimization flags fallback to -O2 377 # In case we filtered out all optimization flags fallback to -O2
325 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 378 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
326 NEW_CFLAGS="${NEW_CFLAGS} -O2" 379 NEW_CFLAGS="${NEW_CFLAGS} -O2"
327 fi 380 fi
328 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 381 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
329 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 382 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
330 fi 383 fi
384 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
385 NEW_FFLAGS="${NEW_FFLAGS} -O2"
386 fi
387 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
388 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
389 fi
331 390
332 set +f # re-enable pathname expansion 391 set +f # re-enable pathname expansion
333 392
334 export CFLAGS="${NEW_CFLAGS}" 393 export CFLAGS="${NEW_CFLAGS}"
335 export CXXFLAGS="${NEW_CXXFLAGS}" 394 export CXXFLAGS="${NEW_CXXFLAGS}"
395 export FFLAGS="${NEW_FFLAGS}"
396 export FCFLAGS="${NEW_FCFLAGS}"
336 return 0 397 return 0
337} 398}
338 399
339test-flag-PROG() { 400test-flag-PROG() {
340 local comp=$1 401 local comp=$1
346 local PROG=$(tc-get${comp}) 407 local PROG=$(tc-get${comp})
347 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 408 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
348 > /dev/null 2>&1 409 > /dev/null 2>&1
349} 410}
350 411
351# Returns true if C compiler support given flag 412# @FUNCTION: test-flag-CC
413# @USAGE: <flag>
414# @DESCRIPTION:
415# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
352test-flag-CC() { test-flag-PROG "CC" "$1"; } 416test-flag-CC() { test-flag-PROG "CC" "$1"; }
353 417
354# Returns true if C++ compiler support given flag 418# @FUNCTION: test-flag-CXX
419# @USAGE: <flag>
420# @DESCRIPTION:
421# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
355test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 422test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
423
424# @FUNCTION: test-flag-F77
425# @USAGE: <flag>
426# @DESCRIPTION:
427# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
428test-flag-F77() { test-flag-PROG "F77" "$1"; }
429
430# @FUNCTION: test-flag-FC
431# @USAGE: <flag>
432# @DESCRIPTION:
433# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
434test-flag-FC() { test-flag-PROG "FC" "$1"; }
356 435
357test-flags-PROG() { 436test-flags-PROG() {
358 local comp=$1 437 local comp=$1
359 local flags 438 local flags
360 local x 439 local x
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 "$@"; }
386 486
387# Depriciated, use test-flags() 487# @FUNCTION: test_flag
488# @DESCRIPTION:
489# DEPRICIATED, use test-flags()
388test_flag() { 490test_flag() {
389 ewarn "test_flag: deprecated, please use test-flags()!" >&2 491 ewarn "test_flag: deprecated, please use test-flags()!" >&2
390 492
391 test-flags-CC "$@" 493 test-flags-CC "$@"
392} 494}
393 495
496# @FUNCTION: test_version_info
497# @USAGE: <version>
498# @DESCRIPTION:
499# Returns shell true if the current C compiler version matches <version>, else returns shell false.
500# Accepts shell globs.
394test_version_info() { 501test_version_info() {
395 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 502 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
396 return 0 503 return 0
397 else 504 else
398 return 1 505 return 1
399 fi 506 fi
400} 507}
401 508
509# @FUNCTION: strip-unsupported-flags
510# @DESCRIPTION:
511# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
402strip-unsupported-flags() { 512strip-unsupported-flags() {
403 export CFLAGS=$(test-flags-CC ${CFLAGS}) 513 export CFLAGS=$(test-flags-CC ${CFLAGS})
404 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) 514 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
515 export FFLAGS=$(test-flags-F77 ${FFLAGS})
516 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
405} 517}
406 518
519# @FUNCTION: get-flag
520# @USAGE: <flag>
521# @DESCRIPTION:
522# Find and echo the value for a particular flag. Accepts shell globs.
407get-flag() { 523get-flag() {
408 local f findflag="$1" 524 local f findflag="$1"
409 525
410 # this code looks a little flaky but seems to work for 526 # this code looks a little flaky but seems to work for
411 # everything we want ... 527 # everything we want ...
412 # for example, if CFLAGS="-march=i686": 528 # for example, if CFLAGS="-march=i686":
413 # `get-flag -march` == "-march=i686" 529 # `get-flag -march` == "-march=i686"
414 # `get-flag march` == "i686" 530 # `get-flag march` == "i686"
415 for f in ${CFLAGS} ${CXXFLAGS} ; do 531 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
416 if [ "${f/${findflag}}" != "${f}" ] ; then 532 if [ "${f/${findflag}}" != "${f}" ] ; then
417 printf "%s\n" "${f/-${findflag}=}" 533 printf "%s\n" "${f/-${findflag}=}"
418 return 0 534 return 0
419 fi 535 fi
420 done 536 done
421 return 1 537 return 1
422} 538}
423 539
540# @FUNCTION: has_hardened
541# @DESCRIPTION:
424# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 542# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
425has_hardened() { 543has_hardened() {
426 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 544 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
427 545
428 test_version_info Hardened && return 0 546 test_version_info Hardened && return 0
429 # The specs file wont exist unless gcc has GCC_SPECS support 547 # The specs file wont exist unless gcc has GCC_SPECS support
430 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 548 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
431} 549}
432 550
551# @FUNCTION: has_pic
552# @DESCRIPTION:
433# DEPRECATED - use gcc-specs-pie from toolchain-funcs 553# DEPRECATED - use gcc-specs-pie from toolchain-funcs
434# indicate whether PIC is set 554# indicate whether PIC is set
435has_pic() { 555has_pic() {
436 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 556 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
437 557
438 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 558 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
439 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \ 559 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
440 gcc-specs-pie 560 gcc-specs-pie
441} 561}
442 562
563# @FUNCTION: has_pie
564# @DESCRIPTION:
443# DEPRECATED - use gcc-specs-pie from toolchain-funcs 565# DEPRECATED - use gcc-specs-pie from toolchain-funcs
444# indicate whether PIE is set 566# indicate whether PIE is set
445has_pie() { 567has_pie() {
446 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 568 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
447 569
448 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 570 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
449 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \ 571 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
450 gcc-specs-pie 572 gcc-specs-pie
451} 573}
452 574
575# @FUNCTION: has_ssp_all
576# @DESCRIPTION:
453# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 577# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
454# indicate whether code for SSP is being generated for all functions 578# indicate whether code for SSP is being generated for all functions
455has_ssp_all() { 579has_ssp_all() {
456 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 580 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
457 581
458 # note; this matches only -fstack-protector-all 582 # note; this matches only -fstack-protector-all
459 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 583 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
460 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 584 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
461 gcc-specs-ssp-all 585 gcc-specs-ssp-to-all
462} 586}
463 587
588# @FUNCTION: has_ssp
589# @DESCRIPTION:
464# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 590# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
465# indicate whether code for SSP is being generated 591# indicate whether code for SSP is being generated
466has_ssp() { 592has_ssp() {
467 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 593 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
468 594
470 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 596 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
471 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 597 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
472 gcc-specs-ssp 598 gcc-specs-ssp
473} 599}
474 600
601# @FUNCTION: has_m64
602# @DESCRIPTION:
603# This doesn't test if the flag is accepted, it tests if the flag actually
604# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
605# return code is 0, else the return code is 1.
475has_m64() { 606has_m64() {
476 # this doesnt test if the flag is accepted, it tests if the flag 607 # this doesnt test if the flag is accepted, it tests if the flag
477 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 608 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
478 # please dont replace this function with test_flag in some future 609 # please dont replace this function with test_flag in some future
479 # clean-up! 610 # clean-up!
486 rm -f "${temp}".c 617 rm -f "${temp}".c
487 [[ ${ret} != 1 ]] && return 0 618 [[ ${ret} != 1 ]] && return 0
488 return 1 619 return 1
489} 620}
490 621
622# @FUNCTION: has_m32
623# @DESCRIPTION:
624# This doesn't test if the flag is accepted, it tests if the flag actually
625# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
626# code is 0, else return code is 1.
491has_m32() { 627has_m32() {
492 # this doesnt test if the flag is accepted, it tests if the flag 628 # this doesnt test if the flag is accepted, it tests if the flag
493 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 629 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
494 # please dont replace this function with test_flag in some future 630 # please dont replace this function with test_flag in some future
495 # clean-up! 631 # clean-up!
504 rm -f "${temp}".c 640 rm -f "${temp}".c
505 [[ ${ret} != 1 ]] && return 0 641 [[ ${ret} != 1 ]] && return 0
506 return 1 642 return 1
507} 643}
508 644
645# @FUNCTION: replace-sparc64-flags
646# @DESCRIPTION:
647# Sets mcpu to v8 and uses the original value as mtune if none specified.
509replace-sparc64-flags() { 648replace-sparc64-flags() {
510 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 649 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
511 650
512 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 651 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
513 for x in ${SPARC64_CPUS}; do 652 for x in ${SPARC64_CPUS}; do
530 fi 669 fi
531 670
532 export CFLAGS CXXFLAGS 671 export CFLAGS CXXFLAGS
533} 672}
534 673
674# @FUNCTION: append-libs
675# @USAGE: <libs>
676# @DESCRIPTION:
677# Add extra <libs> to the current LIBS.
678append-libs() {
679 [[ -z $* ]] && return 0
680 local flag
681 for flag in "$@"; do
682 [[ ${flag} == -l* ]] && flag=${flag#-l}
683 export LIBS="${LIBS} -l${flag}"
684 done
685
686 return 0
687}
688
689# @FUNCTION: append-ldflags
690# @USAGE: <flags>
691# @DESCRIPTION:
692# Add extra <flags> to the current LDFLAGS.
535append-ldflags() { 693append-ldflags() {
536 [[ -z $* ]] && return 0 694 [[ -z $* ]] && return 0
695 local flag
696 for flag in "$@"; do
697 [[ ${flag} == -l* ]] && \
698 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
699 done
700
537 export LDFLAGS="${LDFLAGS} $*" 701 export LDFLAGS="${LDFLAGS} $*"
538 return 0 702 return 0
539} 703}
540 704
541# Remove flags from LDFLAGS - it's up to the ebuild to filter 705# @FUNCTION: filter-ldflags
542# CFLAGS and CXXFLAGS via filter-flags if they need to. 706# @USAGE: <flags>
707# @DESCRIPTION:
708# Remove particular <flags> from LDFLAGS. Accepts shell globs.
543filter-ldflags() { 709filter-ldflags() {
544 _filter-var LDFLAGS "$@" 710 _filter-var LDFLAGS "$@"
545 return 0 711 return 0
546} 712}
547 713
714# @FUNCTION: raw-ldflags
715# @USAGE: <flags>
716# @DESCRIPTION:
548# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 717# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
549# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 718# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
550# to gcc where it needs the '-Wl,'. 719# to gcc where it needs the '-Wl,'.
551raw-ldflags() { 720raw-ldflags() {
552 local x input="$@" 721 local x input="$@"
557 set -- "$@" ${x//,/ } 726 set -- "$@" ${x//,/ }
558 done 727 done
559 echo "$@" 728 echo "$@"
560} 729}
561 730
562# Gets the flags needed for "NOW" binding 731# @FUNCTION: no-as-needed
563bindnow-flags() { 732# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
733no-as-needed() {
564 case $($(tc-getLD) -v 2>&1 </dev/null) in 734 case $($(tc-getLD) -v 2>&1 </dev/null) in
565 *GNU* | *'with BFD'*) # GNU ld 735 *GNU*) # GNU ld
566 echo "-Wl,-z,now" ;; 736 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 737 esac
577} 738}
578
579 739
580# Some tests for when we screw with things and want to make 740# Some tests for when we screw with things and want to make
581# sure we didn't break anything 741# sure we didn't break anything
582#TESTS() { 742#TESTS() {
583# CFLAGS="-a -b -c=1" 743# CFLAGS="-a -b -c=1"

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