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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 1.116 2007/03/04 21:03:59 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.159 2011/12/07 06:42:40 vapier 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
30# Note: shell globs and character lists are allowed
95setup-allowed-flags() { 31setup-allowed-flags() {
96 if [[ -z ${ALLOWED_FLAGS} ]] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
97 export ALLOWED_FLAGS="-pipe" 33 export ALLOWED_FLAGS="-pipe"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
104 fi 41 fi
105 # allow a bunch of flags that negate features / control ABI 42 # allow a bunch of flags that negate features / control ABI
106 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"
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
108 -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 \
109 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
110 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
111 -mieee -mieee-with-inexact -mschedule \ 51 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
112 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
113 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
114 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 54 -m32 -m64 -mx32 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
115 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
116 -msecure-plt -D*" 56 -msecure-plt -m*-toc -D* -U*"
117 57
58 # 4.5
59 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60 # 4.6
61 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
62 -mno-bmi -mno-tbm"
63
118 # C[XX]FLAGS that we are think is ok, but needs testing 64 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
119 # NOTE: currently -Os have issues with gcc3 and K6* arch's 65 # NOTE: currently -Os have issues with gcc3 and K6* arch's
120 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 66 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
121 return 0 67 return 0
122} 68}
123 69
133 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 79 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
134 gcc-specs-pie || continue 80 gcc-specs-pie || continue
135 is-flagq -nopie || append-flags -nopie;; 81 is-flagq -nopie || append-flags -nopie;;
136 -fstack-protector) 82 -fstack-protector)
137 gcc-specs-ssp || continue 83 gcc-specs-ssp || continue
138 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 84 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
139 -fstack-protector-all) 85 -fstack-protector-all)
140 gcc-specs-ssp-to-all || continue 86 gcc-specs-ssp-to-all || continue
141 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 87 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
88 -fno-strict-overflow)
89 gcc-specs-nostrict || continue
90 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
142 esac 91 esac
143 done 92 done
144} 93}
145 94
146# Remove occurrences of strings from variable given in $1 95# Remove occurrences of strings from variable given in $1
161 eval new\[\${\#new\[@]}]=\${f} 110 eval new\[\${\#new\[@]}]=\${f}
162 done 111 done
163 eval export ${VAR}=\${new\[*]} 112 eval export ${VAR}=\${new\[*]}
164} 113}
165 114
115# @FUNCTION: filter-flags
116# @USAGE: <flags>
117# @DESCRIPTION:
118# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
166filter-flags() { 119filter-flags() {
167 _filter-hardened "$@" 120 _filter-hardened "$@"
168 _filter-var CFLAGS "$@" 121 _filter-var CFLAGS "$@"
122 _filter-var CPPFLAGS "$@"
169 _filter-var CXXFLAGS "$@" 123 _filter-var CXXFLAGS "$@"
124 _filter-var FFLAGS "$@"
125 _filter-var FCFLAGS "$@"
170 return 0 126 return 0
171} 127}
172 128
129# @FUNCTION: filter-lfs-flags
130# @DESCRIPTION:
131# Remove flags that enable Large File Support.
173filter-lfs-flags() { 132filter-lfs-flags() {
174 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 133 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
134 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
135 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
136 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
137 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
175 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 138 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
176} 139}
177 140
141# @FUNCTION: append-cppflags
142# @USAGE: <flags>
143# @DESCRIPTION:
144# Add extra <flags> to the current CPPFLAGS.
145append-cppflags() {
146 [[ $# -eq 0 ]] && return 0
147 export CPPFLAGS="${CPPFLAGS} $*"
148 return 0
149}
150
151# @FUNCTION: append-cflags
152# @USAGE: <flags>
153# @DESCRIPTION:
154# Add extra <flags> to the current CFLAGS.
155append-cflags() {
156 [[ $# -eq 0 ]] && return 0
157 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
158 return 0
159}
160
161# @FUNCTION: append-cxxflags
162# @USAGE: <flags>
163# @DESCRIPTION:
164# Add extra <flags> to the current CXXFLAGS.
165append-cxxflags() {
166 [[ $# -eq 0 ]] && return 0
167 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
168 return 0
169}
170
171# @FUNCTION: append-fflags
172# @USAGE: <flags>
173# @DESCRIPTION:
174# Add extra <flags> to the current {F,FC}FLAGS.
175append-fflags() {
176 [[ $# -eq 0 ]] && return 0
177 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
178 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
179 return 0
180}
181
182# @FUNCTION: append-lfs-flags
183# @DESCRIPTION:
184# Add flags that enable Large File Support.
178append-lfs-flags() { 185append-lfs-flags() {
179 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 186 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
187 # see comments in filter-lfs-flags func for meaning of these
180 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 188 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
181} 189}
182 190
191# @FUNCTION: append-flags
192# @USAGE: <flags>
193# @DESCRIPTION:
194# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
183append-flags() { 195append-flags() {
184 [[ -z $* ]] && return 0 196 [[ $# -eq 0 ]] && return 0
185 export CFLAGS="${CFLAGS} $*" 197 append-cflags "$@"
186 export CXXFLAGS="${CXXFLAGS} $*" 198 append-cxxflags "$@"
199 append-fflags "$@"
187 return 0 200 return 0
188} 201}
189 202
203# @FUNCTION: replace-flags
204# @USAGE: <old> <new>
205# @DESCRIPTION:
206# Replace the <old> flag with <new>. Accepts shell globs for <old>.
190replace-flags() { 207replace-flags() {
191 [[ $# != 2 ]] \ 208 [[ $# != 2 ]] \
192 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 209 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
193 && die "replace-flags takes 2 arguments, not $#" 210 && die "replace-flags takes 2 arguments, not $#"
194 211
195 local f fset 212 local f fset
196 declare -a new_CFLAGS new_CXXFLAGS 213 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
197 214
198 for fset in CFLAGS CXXFLAGS; do 215 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
199 # Looping over the flags instead of using a global 216 # Looping over the flags instead of using a global
200 # substitution ensures that we're working with flag atoms. 217 # substitution ensures that we're working with flag atoms.
201 # Otherwise globs like -O* have the potential to wipe out the 218 # Otherwise globs like -O* have the potential to wipe out the
202 # list of flags. 219 # list of flags.
203 for f in ${!fset}; do 220 for f in ${!fset}; do
209 done 226 done
210 227
211 return 0 228 return 0
212} 229}
213 230
231# @FUNCTION: replace-cpu-flags
232# @USAGE: <old> <new>
233# @DESCRIPTION:
234# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
235# with flags that select the <new> cpu. Accepts shell globs for <old>.
214replace-cpu-flags() { 236replace-cpu-flags() {
215 local newcpu="$#" ; newcpu="${!newcpu}" 237 local newcpu="$#" ; newcpu="${!newcpu}"
216 while [ $# -gt 1 ] ; do 238 while [ $# -gt 1 ] ; do
217 # quote to make sure that no globbing is done (particularly on 239 # quote to make sure that no globbing is done (particularly on
218 # ${oldcpu}) prior to calling replace-flags 240 # ${oldcpu}) prior to calling replace-flags
230 [[ ${x} == $2 ]] && return 0 252 [[ ${x} == $2 ]] && return 0
231 done 253 done
232 return 1 254 return 1
233} 255}
234 256
257# @FUNCTION: is-flagq
258# @USAGE: <flag>
259# @DESCRIPTION:
260# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
235is-flagq() { 261is-flagq() {
236 [[ -n $2 ]] && die "Usage: is-flag <flag>" 262 [[ -n $2 ]] && die "Usage: is-flag <flag>"
237 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 263 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
238} 264}
239 265
266# @FUNCTION: is-flag
267# @USAGE: <flag>
268# @DESCRIPTION:
269# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
240is-flag() { 270is-flag() {
241 is-flagq "$@" && echo true 271 is-flagq "$@" && echo true
242} 272}
243 273
274# @FUNCTION: is-ldflagq
275# @USAGE: <flag>
276# @DESCRIPTION:
277# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
244is-ldflagq() { 278is-ldflagq() {
245 [[ -n $2 ]] && die "Usage: is-ldflag <flag>" 279 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
246 _is_flagq LDFLAGS $1 280 _is_flagq LDFLAGS $1
247} 281}
248 282
283# @FUNCTION: is-ldflag
284# @USAGE: <flag>
285# @DESCRIPTION:
286# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
249is-ldflag() { 287is-ldflag() {
250 is-ldflagq "$@" && echo true 288 is-ldflagq "$@" && echo true
251} 289}
252 290
291# @FUNCTION: filter-mfpmath
292# @USAGE: <math types>
293# @DESCRIPTION:
294# Remove specified math types from the fpmath flag. For example, if the user
295# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
296# -mfpmath=386.
253filter-mfpmath() { 297filter-mfpmath() {
254 local orig_mfpmath new_math prune_math 298 local orig_mfpmath new_math prune_math
255 299
256 # save the original -mfpmath flag 300 # save the original -mfpmath flag
257 orig_mfpmath=$(get-flag -mfpmath) 301 orig_mfpmath=$(get-flag -mfpmath)
276 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 320 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
277 fi 321 fi
278 return 0 322 return 0
279} 323}
280 324
325# @FUNCTION: strip-flags
326# @DESCRIPTION:
327# Strip C[XX]FLAGS of everything except known good/safe flags.
281strip-flags() { 328strip-flags() {
282 local x y flag NEW_CFLAGS NEW_CXXFLAGS 329 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
283 330
284 setup-allowed-flags 331 setup-allowed-flags
285 332
286 local NEW_CFLAGS="" 333 local NEW_CFLAGS=""
287 local NEW_CXXFLAGS="" 334 local NEW_CXXFLAGS=""
335 local NEW_FFLAGS=""
336 local NEW_FCFLAGS=""
288 337
289 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 338 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
290 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 339 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
291 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 340 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
292 fi 341 fi
293 342
294 set -f # disable pathname expansion 343 set -f # disable pathname expansion
295 344
311 break 360 break
312 fi 361 fi
313 done 362 done
314 done 363 done
315 364
365 for x in ${FFLAGS}; do
366 for y in ${ALLOWED_FLAGS}; do
367 flag=${x%%=*}
368 if [ "${flag%%${y}}" = "" ] ; then
369 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
370 break
371 fi
372 done
373 done
374
375 for x in ${FCFLAGS}; do
376 for y in ${ALLOWED_FLAGS}; do
377 flag=${x%%=*}
378 if [ "${flag%%${y}}" = "" ] ; then
379 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
380 break
381 fi
382 done
383 done
384
316 # In case we filtered out all optimization flags fallback to -O2 385 # In case we filtered out all optimization flags fallback to -O2
317 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 386 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
318 NEW_CFLAGS="${NEW_CFLAGS} -O2" 387 NEW_CFLAGS="${NEW_CFLAGS} -O2"
319 fi 388 fi
320 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 389 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
321 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 390 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
322 fi 391 fi
392 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
393 NEW_FFLAGS="${NEW_FFLAGS} -O2"
394 fi
395 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
396 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
397 fi
323 398
324 set +f # re-enable pathname expansion 399 set +f # re-enable pathname expansion
325 400
326 export CFLAGS="${NEW_CFLAGS}" 401 export CFLAGS="${NEW_CFLAGS}"
327 export CXXFLAGS="${NEW_CXXFLAGS}" 402 export CXXFLAGS="${NEW_CXXFLAGS}"
403 export FFLAGS="${NEW_FFLAGS}"
404 export FCFLAGS="${NEW_FCFLAGS}"
328 return 0 405 return 0
329} 406}
330 407
331test-flag-PROG() { 408test-flag-PROG() {
332 local comp=$1 409 local comp=$1
333 local flags="$2" 410 local flags="$2"
334 411
335 [[ -z ${comp} || -z ${flags} ]] && \ 412 [[ -z ${comp} || -z ${flags} ]] && return 1
336 return 1
337 413
414 # use -c so we can test the assembler as well
338 local PROG=$(tc-get${comp}) 415 local PROG=$(tc-get${comp})
339 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 416 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
340 > /dev/null 2>&1 417 > /dev/null 2>&1
341} 418}
342 419
343# Returns true if C compiler support given flag 420# @FUNCTION: test-flag-CC
421# @USAGE: <flag>
422# @DESCRIPTION:
423# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
344test-flag-CC() { test-flag-PROG "CC" "$1"; } 424test-flag-CC() { test-flag-PROG "CC" "$1"; }
345 425
346# Returns true if C++ compiler support given flag 426# @FUNCTION: test-flag-CXX
427# @USAGE: <flag>
428# @DESCRIPTION:
429# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
347test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 430test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
431
432# @FUNCTION: test-flag-F77
433# @USAGE: <flag>
434# @DESCRIPTION:
435# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
436test-flag-F77() { test-flag-PROG "F77" "$1"; }
437
438# @FUNCTION: test-flag-FC
439# @USAGE: <flag>
440# @DESCRIPTION:
441# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
442test-flag-FC() { test-flag-PROG "FC" "$1"; }
348 443
349test-flags-PROG() { 444test-flags-PROG() {
350 local comp=$1 445 local comp=$1
351 local flags 446 local flags
352 local x 447 local x
353 448
354 shift 449 shift
355 450
356 [[ -z ${comp} ]] && return 1 451 [[ -z ${comp} ]] && return 1
357 452
358 x=""
359 for x in "$@" ; do 453 for x in "$@" ; do
360 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 454 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
361 done 455 done
362 456
363 echo "${flags}" 457 echo "${flags}"
364 458
365 # Just bail if we dont have any flags 459 # Just bail if we dont have any flags
366 [[ -n ${flags} ]] 460 [[ -n ${flags} ]]
367} 461}
368 462
369# Returns (echo's) the given flags supported by the C compiler 463# @FUNCTION: test-flags-CC
464# @USAGE: <flags>
465# @DESCRIPTION:
466# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
370test-flags-CC() { test-flags-PROG "CC" "$@"; } 467test-flags-CC() { test-flags-PROG "CC" "$@"; }
371 468
372# Returns (echo's) the given flags supported by the C++ compiler 469# @FUNCTION: test-flags-CXX
470# @USAGE: <flags>
471# @DESCRIPTION:
472# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
373test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 473test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
374 474
475# @FUNCTION: test-flags-F77
476# @USAGE: <flags>
477# @DESCRIPTION:
478# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
479test-flags-F77() { test-flags-PROG "F77" "$@"; }
480
481# @FUNCTION: test-flags-FC
482# @USAGE: <flags>
483# @DESCRIPTION:
484# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
485test-flags-FC() { test-flags-PROG "FC" "$@"; }
486
487# @FUNCTION: test-flags
488# @USAGE: <flags>
489# @DESCRIPTION:
375# Short-hand that should hopefully work for both C and C++ compiler, but 490# Short-hand that should hopefully work for both C and C++ compiler, but
376# its really only present due to the append-flags() abomination. 491# its really only present due to the append-flags() abomination.
377test-flags() { test-flags-CC "$@"; } 492test-flags() { test-flags-CC "$@"; }
378 493
379# Depriciated, use test-flags() 494# @FUNCTION: test_version_info
380test_flag() { 495# @USAGE: <version>
381 ewarn "test_flag: deprecated, please use test-flags()!" >&2 496# @DESCRIPTION:
382 497# Returns shell true if the current C compiler version matches <version>, else returns shell false.
383 test-flags-CC "$@" 498# Accepts shell globs.
384}
385
386test_version_info() { 499test_version_info() {
387 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 500 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
388 return 0 501 return 0
389 else 502 else
390 return 1 503 return 1
391 fi 504 fi
392} 505}
393 506
507# @FUNCTION: strip-unsupported-flags
508# @DESCRIPTION:
509# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
394strip-unsupported-flags() { 510strip-unsupported-flags() {
395 export CFLAGS=$(test-flags-CC ${CFLAGS}) 511 export CFLAGS=$(test-flags-CC ${CFLAGS})
396 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) 512 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
513 export FFLAGS=$(test-flags-F77 ${FFLAGS})
514 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
397} 515}
398 516
517# @FUNCTION: get-flag
518# @USAGE: <flag>
519# @DESCRIPTION:
520# Find and echo the value for a particular flag. Accepts shell globs.
399get-flag() { 521get-flag() {
400 local f findflag="$1" 522 local f findflag="$1"
401 523
402 # this code looks a little flaky but seems to work for 524 # this code looks a little flaky but seems to work for
403 # everything we want ... 525 # everything we want ...
404 # for example, if CFLAGS="-march=i686": 526 # for example, if CFLAGS="-march=i686":
405 # `get-flag -march` == "-march=i686" 527 # `get-flag -march` == "-march=i686"
406 # `get-flag march` == "i686" 528 # `get-flag march` == "i686"
407 for f in ${CFLAGS} ${CXXFLAGS} ; do 529 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
408 if [ "${f/${findflag}}" != "${f}" ] ; then 530 if [ "${f/${findflag}}" != "${f}" ] ; then
409 printf "%s\n" "${f/-${findflag}=}" 531 printf "%s\n" "${f/-${findflag}=}"
410 return 0 532 return 0
411 fi 533 fi
412 done 534 done
413 return 1 535 return 1
414} 536}
415 537
416# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 538# DEAD FUNCS. Remove by Dec 2011.
417has_hardened() { 539test_flag() { die "$0: deprecated, please use test-flags()!" ; }
418 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 540has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
419
420 test_version_info Hardened && return 0
421 # The specs file wont exist unless gcc has GCC_SPECS support
422 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
423}
424
425# DEPRECATED - use gcc-specs-pie from toolchain-funcs
426# indicate whether PIC is set
427has_pic() {
428 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 541has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
429
430 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
431 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
432 gcc-specs-pie
433}
434
435# DEPRECATED - use gcc-specs-pie from toolchain-funcs
436# indicate whether PIE is set
437has_pie() {
438 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 542has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
439
440 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
441 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
442 gcc-specs-pie
443}
444
445# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
446# indicate whether code for SSP is being generated for all functions
447has_ssp_all() {
448 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 543has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
449
450 # note; this matches only -fstack-protector-all
451 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
452 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
453 gcc-specs-ssp-all
454}
455
456# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
457# indicate whether code for SSP is being generated
458has_ssp() {
459 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 544has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
460 545
461 # note; this matches both -fstack-protector and -fstack-protector-all 546# @FUNCTION: has_m64
462 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 547# @DESCRIPTION:
463 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 548# This doesn't test if the flag is accepted, it tests if the flag actually
464 gcc-specs-ssp 549# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
465} 550# return code is 0, else the return code is 1.
466
467has_m64() { 551has_m64() {
468 # this doesnt test if the flag is accepted, it tests if the flag 552 # this doesnt test if the flag is accepted, it tests if the flag
469 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 553 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
470 # please dont replace this function with test_flag in some future 554 # please dont replace this function with test_flag in some future
471 # clean-up! 555 # clean-up!
478 rm -f "${temp}".c 562 rm -f "${temp}".c
479 [[ ${ret} != 1 ]] && return 0 563 [[ ${ret} != 1 ]] && return 0
480 return 1 564 return 1
481} 565}
482 566
567# @FUNCTION: has_m32
568# @DESCRIPTION:
569# This doesn't test if the flag is accepted, it tests if the flag actually
570# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
571# code is 0, else return code is 1.
483has_m32() { 572has_m32() {
484 # this doesnt test if the flag is accepted, it tests if the flag 573 # this doesnt test if the flag is accepted, it tests if the flag
485 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 574 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
486 # please dont replace this function with test_flag in some future 575 # please dont replace this function with test_flag in some future
487 # clean-up! 576 # clean-up!
496 rm -f "${temp}".c 585 rm -f "${temp}".c
497 [[ ${ret} != 1 ]] && return 0 586 [[ ${ret} != 1 ]] && return 0
498 return 1 587 return 1
499} 588}
500 589
590# @FUNCTION: replace-sparc64-flags
591# @DESCRIPTION:
592# Sets mcpu to v8 and uses the original value as mtune if none specified.
501replace-sparc64-flags() { 593replace-sparc64-flags() {
502 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 594 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
503 595
504 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 596 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
505 for x in ${SPARC64_CPUS}; do 597 for x in ${SPARC64_CPUS}; do
522 fi 614 fi
523 615
524 export CFLAGS CXXFLAGS 616 export CFLAGS CXXFLAGS
525} 617}
526 618
619# @FUNCTION: append-libs
620# @USAGE: <libs>
621# @DESCRIPTION:
622# Add extra <libs> to the current LIBS.
623append-libs() {
624 [[ $# -eq 0 ]] && return 0
625 local flag
626 for flag in "$@"; do
627 [[ ${flag} == -l* ]] && flag=${flag#-l}
628 export LIBS="${LIBS} -l${flag}"
629 done
630
631 return 0
632}
633
634# @FUNCTION: append-ldflags
635# @USAGE: <flags>
636# @DESCRIPTION:
637# Add extra <flags> to the current LDFLAGS.
527append-ldflags() { 638append-ldflags() {
528 [[ -z $* ]] && return 0 639 [[ $# -eq 0 ]] && return 0
640 local flag
641 for flag in "$@"; do
642 [[ ${flag} == -l* ]] && \
643 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
644 done
645
529 export LDFLAGS="${LDFLAGS} $*" 646 export LDFLAGS="${LDFLAGS} $*"
530 return 0 647 return 0
531} 648}
532 649
533# Remove flags from LDFLAGS - it's up to the ebuild to filter 650# @FUNCTION: filter-ldflags
534# CFLAGS and CXXFLAGS via filter-flags if they need to. 651# @USAGE: <flags>
652# @DESCRIPTION:
653# Remove particular <flags> from LDFLAGS. Accepts shell globs.
535filter-ldflags() { 654filter-ldflags() {
536 _filter-var LDFLAGS "$@" 655 _filter-var LDFLAGS "$@"
537 return 0 656 return 0
538} 657}
539 658
659# @FUNCTION: raw-ldflags
660# @USAGE: [flags]
661# @DESCRIPTION:
540# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 662# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
541# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 663# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
542# to gcc where it needs the '-Wl,'. 664# to gcc where it needs the '-Wl,'.
665#
666# If no flags are specified, then default to ${LDFLAGS}.
543raw-ldflags() { 667raw-ldflags() {
544 local x input="$@" 668 local x input="$@"
545 [[ -z ${input} ]] && input=${LDFLAGS} 669 [[ -z ${input} ]] && input=${LDFLAGS}
546 set -- 670 set --
547 for x in ${input} ; do 671 for x in ${input} ; do
549 set -- "$@" ${x//,/ } 673 set -- "$@" ${x//,/ }
550 done 674 done
551 echo "$@" 675 echo "$@"
552} 676}
553 677
554# Gets the flags needed for "NOW" binding 678# @FUNCTION: no-as-needed
555bindnow-flags() { 679# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
680no-as-needed() {
556 case $($(tc-getLD) -v 2>&1 </dev/null) in 681 case $($(tc-getLD) -v 2>&1 </dev/null) in
557 *GNU* | *'with BFD'*) # GNU ld 682 *GNU*) # GNU ld
558 echo "-Wl,-z,now" ;; 683 echo "-Wl,--no-as-needed" ;;
559 *Apple*) # Darwin ld
560 echo "-bind_at_load" ;;
561 *)
562 # Some linkers just recognize -V instead of -v
563 case $($(tc-getLD) -V 2>&1 </dev/null) in
564 *Solaris*) # Solaris accept almost the same GNU options
565 echo "-Wl,-z,now" ;;
566 esac
567 ;;
568 esac 684 esac
569} 685}
570
571 686
572# Some tests for when we screw with things and want to make 687# Some tests for when we screw with things and want to make
573# sure we didn't break anything 688# sure we didn't break anything
574#TESTS() { 689#TESTS() {
575# CFLAGS="-a -b -c=1" 690# CFLAGS="-a -b -c=1"

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