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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 1.162 2011/12/28 05:48:28 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 35 if [[ -z ${ALLOWED_FLAGS} ]] ; then
98 export ALLOWED_FLAGS="-pipe" 36 export ALLOWED_FLAGS="-pipe"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O1 -O2 -Os -mcpu -march -mtune"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 39 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" 40 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+" 41 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
104 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 42 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive"
43 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
105 fi 44 fi
106 # allow a bunch of flags that negate features / control ABI 45 # allow a bunch of flags that negate features / control ABI
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 46 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
47 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
108 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 48 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
109 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 49 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
50 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
51 -mno-popcnt -mno-abm \
110 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 52 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
111 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 53 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
112 -mieee -mieee-with-inexact -mschedule \ 54 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
113 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 55 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
114 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 56 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
115 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 57 -m32 -m64 -mx32 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
116 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 58 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
117 -msecure-plt -D*" 59 -msecure-plt -m*-toc -D* -U*"
118 60
119 # C[XX]FLAGS that we are think is ok, but needs testing 61 # 4.5
120 # NOTE: currently -Os have issues with gcc3 and K6* arch's 62 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
121 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 63 # 4.6
64 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
65 -mno-bmi -mno-tbm"
66
122 return 0 67 return 0
123} 68}
124 69
125# inverted filters for hardened compiler. This is trying to unpick 70# inverted filters for hardened compiler. This is trying to unpick
126# the hardened compiler defaults. 71# the hardened compiler defaults.
134 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 79 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
135 gcc-specs-pie || continue 80 gcc-specs-pie || continue
136 is-flagq -nopie || append-flags -nopie;; 81 is-flagq -nopie || append-flags -nopie;;
137 -fstack-protector) 82 -fstack-protector)
138 gcc-specs-ssp || continue 83 gcc-specs-ssp || continue
139 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 84 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
140 -fstack-protector-all) 85 -fstack-protector-all)
141 gcc-specs-ssp-to-all || continue 86 gcc-specs-ssp-to-all || continue
142 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);;
143 esac 91 esac
144 done 92 done
145} 93}
146 94
147# Remove occurrences of strings from variable given in $1 95# Remove occurrences of strings from variable given in $1
162 eval new\[\${\#new\[@]}]=\${f} 110 eval new\[\${\#new\[@]}]=\${f}
163 done 111 done
164 eval export ${VAR}=\${new\[*]} 112 eval export ${VAR}=\${new\[*]}
165} 113}
166 114
115# @FUNCTION: filter-flags
116# @USAGE: <flags>
117# @DESCRIPTION:
118# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
167filter-flags() { 119filter-flags() {
168 _filter-hardened "$@" 120 _filter-hardened "$@"
169 _filter-var CFLAGS "$@" 121 _filter-var CFLAGS "$@"
170 _filter-var CPPFLAGS "$@" 122 _filter-var CPPFLAGS "$@"
171 _filter-var CXXFLAGS "$@" 123 _filter-var CXXFLAGS "$@"
124 _filter-var FFLAGS "$@"
125 _filter-var FCFLAGS "$@"
172 return 0 126 return 0
173} 127}
174 128
129# @FUNCTION: filter-lfs-flags
130# @DESCRIPTION:
131# Remove flags that enable Large File Support.
175filter-lfs-flags() { 132filter-lfs-flags() {
176 [[ -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)
177 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
178} 139}
179 140
141# @FUNCTION: append-cppflags
142# @USAGE: <flags>
143# @DESCRIPTION:
144# Add extra <flags> to the current CPPFLAGS.
180append-cppflags() { 145append-cppflags() {
181 [[ -z $* ]] && return 0 146 [[ $# -eq 0 ]] && return 0
182 export CPPFLAGS="${CPPFLAGS} $*" 147 export CPPFLAGS="${CPPFLAGS} $*"
183 return 0 148 return 0
184} 149}
185 150
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.
186append-lfs-flags() { 185append-lfs-flags() {
187 [[ -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
188 append-cppflags -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
189} 189}
190 190
191# @FUNCTION: append-flags
192# @USAGE: <flags>
193# @DESCRIPTION:
194# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
191append-flags() { 195append-flags() {
192 [[ -z $* ]] && return 0 196 [[ $# -eq 0 ]] && return 0
193 export CFLAGS="${CFLAGS} $*" 197 append-cflags "$@"
194 export CXXFLAGS="${CXXFLAGS} $*" 198 append-cxxflags "$@"
199 append-fflags "$@"
195 return 0 200 return 0
196} 201}
197 202
203# @FUNCTION: replace-flags
204# @USAGE: <old> <new>
205# @DESCRIPTION:
206# Replace the <old> flag with <new>. Accepts shell globs for <old>.
198replace-flags() { 207replace-flags() {
199 [[ $# != 2 ]] \ 208 [[ $# != 2 ]] \
200 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 209 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
201 && die "replace-flags takes 2 arguments, not $#" 210 && die "replace-flags takes 2 arguments, not $#"
202 211
203 local f fset 212 local f fset
204 declare -a new_CFLAGS new_CXXFLAGS 213 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
205 214
206 for fset in CFLAGS CXXFLAGS; do 215 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
207 # Looping over the flags instead of using a global 216 # Looping over the flags instead of using a global
208 # substitution ensures that we're working with flag atoms. 217 # substitution ensures that we're working with flag atoms.
209 # Otherwise globs like -O* have the potential to wipe out the 218 # Otherwise globs like -O* have the potential to wipe out the
210 # list of flags. 219 # list of flags.
211 for f in ${!fset}; do 220 for f in ${!fset}; do
217 done 226 done
218 227
219 return 0 228 return 0
220} 229}
221 230
231# @FUNCTION: replace-cpu-flags
232# @USAGE: <old> <new>
233# @DESCRIPTION:
234# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
235# with flags that select the <new> cpu. Accepts shell globs for <old>.
222replace-cpu-flags() { 236replace-cpu-flags() {
223 local newcpu="$#" ; newcpu="${!newcpu}" 237 local newcpu="$#" ; newcpu="${!newcpu}"
224 while [ $# -gt 1 ] ; do 238 while [ $# -gt 1 ] ; do
225 # quote to make sure that no globbing is done (particularly on 239 # quote to make sure that no globbing is done (particularly on
226 # ${oldcpu}) prior to calling replace-flags 240 # ${oldcpu}) prior to calling replace-flags
238 [[ ${x} == $2 ]] && return 0 252 [[ ${x} == $2 ]] && return 0
239 done 253 done
240 return 1 254 return 1
241} 255}
242 256
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.
243is-flagq() { 261is-flagq() {
244 [[ -n $2 ]] && die "Usage: is-flag <flag>" 262 [[ -n $2 ]] && die "Usage: is-flag <flag>"
245 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 263 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
246} 264}
247 265
266# @FUNCTION: is-flag
267# @USAGE: <flag>
268# @DESCRIPTION:
269# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
248is-flag() { 270is-flag() {
249 is-flagq "$@" && echo true 271 is-flagq "$@" && echo true
250} 272}
251 273
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.
252is-ldflagq() { 278is-ldflagq() {
253 [[ -n $2 ]] && die "Usage: is-ldflag <flag>" 279 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
254 _is_flagq LDFLAGS $1 280 _is_flagq LDFLAGS $1
255} 281}
256 282
283# @FUNCTION: is-ldflag
284# @USAGE: <flag>
285# @DESCRIPTION:
286# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
257is-ldflag() { 287is-ldflag() {
258 is-ldflagq "$@" && echo true 288 is-ldflagq "$@" && echo true
259} 289}
260 290
291# @FUNCTION: filter-mfpmath
292# @USAGE: <math types>
293# @DESCRIPTION:
294# Remove specified math types from the fpmath flag. For example, if the user
295# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
296# -mfpmath=386.
261filter-mfpmath() { 297filter-mfpmath() {
262 local orig_mfpmath new_math prune_math 298 local orig_mfpmath new_math prune_math
263 299
264 # save the original -mfpmath flag 300 # save the original -mfpmath flag
265 orig_mfpmath=$(get-flag -mfpmath) 301 orig_mfpmath=$(get-flag -mfpmath)
284 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 320 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
285 fi 321 fi
286 return 0 322 return 0
287} 323}
288 324
325# @FUNCTION: strip-flags
326# @DESCRIPTION:
327# Strip C[XX]FLAGS of everything except known good/safe flags.
289strip-flags() { 328strip-flags() {
290 local x y flag NEW_CFLAGS NEW_CXXFLAGS 329 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
291 330
292 setup-allowed-flags 331 setup-allowed-flags
293 332
294 local NEW_CFLAGS="" 333 local NEW_CFLAGS=""
295 local NEW_CXXFLAGS="" 334 local NEW_CXXFLAGS=""
296 335 local NEW_FFLAGS=""
297 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 336 local NEW_FCFLAGS=""
298 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
299 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
300 fi
301 337
302 set -f # disable pathname expansion 338 set -f # disable pathname expansion
303 339
304 for x in ${CFLAGS}; do 340 for x in ${CFLAGS}; do
305 for y in ${ALLOWED_FLAGS}; do 341 for y in ${ALLOWED_FLAGS}; do
319 break 355 break
320 fi 356 fi
321 done 357 done
322 done 358 done
323 359
360 for x in ${FFLAGS}; do
361 for y in ${ALLOWED_FLAGS}; do
362 flag=${x%%=*}
363 if [ "${flag%%${y}}" = "" ] ; then
364 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
365 break
366 fi
367 done
368 done
369
370 for x in ${FCFLAGS}; do
371 for y in ${ALLOWED_FLAGS}; do
372 flag=${x%%=*}
373 if [ "${flag%%${y}}" = "" ] ; then
374 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
375 break
376 fi
377 done
378 done
379
324 # In case we filtered out all optimization flags fallback to -O2 380 # In case we filtered out all optimization flags fallback to -O2
325 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 381 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
326 NEW_CFLAGS="${NEW_CFLAGS} -O2" 382 NEW_CFLAGS="${NEW_CFLAGS} -O2"
327 fi 383 fi
328 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 384 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
329 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 385 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
330 fi 386 fi
387 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
388 NEW_FFLAGS="${NEW_FFLAGS} -O2"
389 fi
390 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
391 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
392 fi
331 393
332 set +f # re-enable pathname expansion 394 set +f # re-enable pathname expansion
333 395
334 export CFLAGS="${NEW_CFLAGS}" 396 export CFLAGS="${NEW_CFLAGS}"
335 export CXXFLAGS="${NEW_CXXFLAGS}" 397 export CXXFLAGS="${NEW_CXXFLAGS}"
398 export FFLAGS="${NEW_FFLAGS}"
399 export FCFLAGS="${NEW_FCFLAGS}"
336 return 0 400 return 0
337} 401}
338 402
339test-flag-PROG() { 403test-flag-PROG() {
340 local comp=$1 404 local comp=$1
341 local flags="$2" 405 local flags="$2"
342 406
343 [[ -z ${comp} || -z ${flags} ]] && \ 407 [[ -z ${comp} || -z ${flags} ]] && return 1
344 return 1
345 408
409 # use -c so we can test the assembler as well
346 local PROG=$(tc-get${comp}) 410 local PROG=$(tc-get${comp})
347 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 411 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
348 > /dev/null 2>&1 412 > /dev/null 2>&1
349} 413}
350 414
351# Returns true if C compiler support given flag 415# @FUNCTION: test-flag-CC
416# @USAGE: <flag>
417# @DESCRIPTION:
418# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
352test-flag-CC() { test-flag-PROG "CC" "$1"; } 419test-flag-CC() { test-flag-PROG "CC" "$1"; }
353 420
354# Returns true if C++ compiler support given flag 421# @FUNCTION: test-flag-CXX
422# @USAGE: <flag>
423# @DESCRIPTION:
424# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
355test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 425test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
426
427# @FUNCTION: test-flag-F77
428# @USAGE: <flag>
429# @DESCRIPTION:
430# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
431test-flag-F77() { test-flag-PROG "F77" "$1"; }
432
433# @FUNCTION: test-flag-FC
434# @USAGE: <flag>
435# @DESCRIPTION:
436# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
437test-flag-FC() { test-flag-PROG "FC" "$1"; }
356 438
357test-flags-PROG() { 439test-flags-PROG() {
358 local comp=$1 440 local comp=$1
359 local flags 441 local flags
360 local x 442 local x
361 443
362 shift 444 shift
363 445
364 [[ -z ${comp} ]] && return 1 446 [[ -z ${comp} ]] && return 1
365 447
366 x=""
367 for x in "$@" ; do 448 for x in "$@" ; do
368 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 449 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
369 done 450 done
370 451
371 echo "${flags}" 452 echo "${flags}"
372 453
373 # Just bail if we dont have any flags 454 # Just bail if we dont have any flags
374 [[ -n ${flags} ]] 455 [[ -n ${flags} ]]
375} 456}
376 457
377# Returns (echo's) the given flags supported by the C compiler 458# @FUNCTION: test-flags-CC
459# @USAGE: <flags>
460# @DESCRIPTION:
461# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
378test-flags-CC() { test-flags-PROG "CC" "$@"; } 462test-flags-CC() { test-flags-PROG "CC" "$@"; }
379 463
380# Returns (echo's) the given flags supported by the C++ compiler 464# @FUNCTION: test-flags-CXX
465# @USAGE: <flags>
466# @DESCRIPTION:
467# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
381test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 468test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
382 469
470# @FUNCTION: test-flags-F77
471# @USAGE: <flags>
472# @DESCRIPTION:
473# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
474test-flags-F77() { test-flags-PROG "F77" "$@"; }
475
476# @FUNCTION: test-flags-FC
477# @USAGE: <flags>
478# @DESCRIPTION:
479# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
480test-flags-FC() { test-flags-PROG "FC" "$@"; }
481
482# @FUNCTION: test-flags
483# @USAGE: <flags>
484# @DESCRIPTION:
383# Short-hand that should hopefully work for both C and C++ compiler, but 485# Short-hand that should hopefully work for both C and C++ compiler, but
384# its really only present due to the append-flags() abomination. 486# its really only present due to the append-flags() abomination.
385test-flags() { test-flags-CC "$@"; } 487test-flags() { test-flags-CC "$@"; }
386 488
387# Depriciated, use test-flags() 489# @FUNCTION: test_version_info
388test_flag() { 490# @USAGE: <version>
389 ewarn "test_flag: deprecated, please use test-flags()!" >&2 491# @DESCRIPTION:
390 492# Returns shell true if the current C compiler version matches <version>, else returns shell false.
391 test-flags-CC "$@" 493# Accepts shell globs.
392}
393
394test_version_info() { 494test_version_info() {
395 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 495 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
396 return 0 496 return 0
397 else 497 else
398 return 1 498 return 1
399 fi 499 fi
400} 500}
401 501
502# @FUNCTION: strip-unsupported-flags
503# @DESCRIPTION:
504# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
402strip-unsupported-flags() { 505strip-unsupported-flags() {
403 export CFLAGS=$(test-flags-CC ${CFLAGS}) 506 export CFLAGS=$(test-flags-CC ${CFLAGS})
404 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) 507 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
508 export FFLAGS=$(test-flags-F77 ${FFLAGS})
509 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
405} 510}
406 511
512# @FUNCTION: get-flag
513# @USAGE: <flag>
514# @DESCRIPTION:
515# Find and echo the value for a particular flag. Accepts shell globs.
407get-flag() { 516get-flag() {
408 local f findflag="$1" 517 local f findflag="$1"
409 518
410 # this code looks a little flaky but seems to work for 519 # this code looks a little flaky but seems to work for
411 # everything we want ... 520 # everything we want ...
412 # for example, if CFLAGS="-march=i686": 521 # for example, if CFLAGS="-march=i686":
413 # `get-flag -march` == "-march=i686" 522 # `get-flag -march` == "-march=i686"
414 # `get-flag march` == "i686" 523 # `get-flag march` == "i686"
415 for f in ${CFLAGS} ${CXXFLAGS} ; do 524 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
416 if [ "${f/${findflag}}" != "${f}" ] ; then 525 if [ "${f/${findflag}}" != "${f}" ] ; then
417 printf "%s\n" "${f/-${findflag}=}" 526 printf "%s\n" "${f/-${findflag}=}"
418 return 0 527 return 0
419 fi 528 fi
420 done 529 done
421 return 1 530 return 1
422} 531}
423 532
424# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 533# DEAD FUNCS. Remove by Dec 2011.
425has_hardened() { 534test_flag() { die "$0: deprecated, please use test-flags()!" ; }
426 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 535has_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 536has_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 537has_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 538has_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 539has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
468 540
469 # note; this matches both -fstack-protector and -fstack-protector-all 541# @FUNCTION: has_m64
470 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 542# @DESCRIPTION:
471 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 543# This doesn't test if the flag is accepted, it tests if the flag actually
472 gcc-specs-ssp 544# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
473} 545# return code is 0, else the return code is 1.
474
475has_m64() { 546has_m64() {
476 # this doesnt test if the flag is accepted, it tests if the flag 547 # this doesnt test if the flag is accepted, it tests if the flag
477 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 548 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
478 # please dont replace this function with test_flag in some future 549 # please dont replace this function with test_flag in some future
479 # clean-up! 550 # clean-up!
486 rm -f "${temp}".c 557 rm -f "${temp}".c
487 [[ ${ret} != 1 ]] && return 0 558 [[ ${ret} != 1 ]] && return 0
488 return 1 559 return 1
489} 560}
490 561
562# @FUNCTION: has_m32
563# @DESCRIPTION:
564# This doesn't test if the flag is accepted, it tests if the flag actually
565# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
566# code is 0, else return code is 1.
491has_m32() { 567has_m32() {
492 # this doesnt test if the flag is accepted, it tests if the flag 568 # this doesnt test if the flag is accepted, it tests if the flag
493 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 569 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
494 # please dont replace this function with test_flag in some future 570 # please dont replace this function with test_flag in some future
495 # clean-up! 571 # clean-up!
504 rm -f "${temp}".c 580 rm -f "${temp}".c
505 [[ ${ret} != 1 ]] && return 0 581 [[ ${ret} != 1 ]] && return 0
506 return 1 582 return 1
507} 583}
508 584
585# @FUNCTION: replace-sparc64-flags
586# @DESCRIPTION:
587# Sets mcpu to v8 and uses the original value as mtune if none specified.
509replace-sparc64-flags() { 588replace-sparc64-flags() {
510 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 589 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
511 590
512 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 591 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
513 for x in ${SPARC64_CPUS}; do 592 for x in ${SPARC64_CPUS}; do
530 fi 609 fi
531 610
532 export CFLAGS CXXFLAGS 611 export CFLAGS CXXFLAGS
533} 612}
534 613
614# @FUNCTION: append-libs
615# @USAGE: <libs>
616# @DESCRIPTION:
617# Add extra <libs> to the current LIBS.
618append-libs() {
619 [[ $# -eq 0 ]] && return 0
620 local flag
621 for flag in "$@"; do
622 [[ ${flag} == -l* ]] && flag=${flag#-l}
623 export LIBS="${LIBS} -l${flag}"
624 done
625
626 return 0
627}
628
629# @FUNCTION: append-ldflags
630# @USAGE: <flags>
631# @DESCRIPTION:
632# Add extra <flags> to the current LDFLAGS.
535append-ldflags() { 633append-ldflags() {
536 [[ -z $* ]] && return 0 634 [[ $# -eq 0 ]] && return 0
635 local flag
636 for flag in "$@"; do
637 [[ ${flag} == -l* ]] && \
638 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
639 done
640
537 export LDFLAGS="${LDFLAGS} $*" 641 export LDFLAGS="${LDFLAGS} $*"
538 return 0 642 return 0
539} 643}
540 644
541# Remove flags from LDFLAGS - it's up to the ebuild to filter 645# @FUNCTION: filter-ldflags
542# CFLAGS and CXXFLAGS via filter-flags if they need to. 646# @USAGE: <flags>
647# @DESCRIPTION:
648# Remove particular <flags> from LDFLAGS. Accepts shell globs.
543filter-ldflags() { 649filter-ldflags() {
544 _filter-var LDFLAGS "$@" 650 _filter-var LDFLAGS "$@"
545 return 0 651 return 0
546} 652}
547 653
654# @FUNCTION: raw-ldflags
655# @USAGE: [flags]
656# @DESCRIPTION:
548# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 657# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
549# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 658# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
550# to gcc where it needs the '-Wl,'. 659# to gcc where it needs the '-Wl,'.
660#
661# If no flags are specified, then default to ${LDFLAGS}.
551raw-ldflags() { 662raw-ldflags() {
552 local x input="$@" 663 local x input="$@"
553 [[ -z ${input} ]] && input=${LDFLAGS} 664 [[ -z ${input} ]] && input=${LDFLAGS}
554 set -- 665 set --
555 for x in ${input} ; do 666 for x in ${input} ; do
557 set -- "$@" ${x//,/ } 668 set -- "$@" ${x//,/ }
558 done 669 done
559 echo "$@" 670 echo "$@"
560} 671}
561 672
562# Gets the flags needed for "NOW" binding 673# @FUNCTION: no-as-needed
563bindnow-flags() { 674# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
675no-as-needed() {
564 case $($(tc-getLD) -v 2>&1 </dev/null) in 676 case $($(tc-getLD) -v 2>&1 </dev/null) in
565 *GNU* | *'with BFD'*) # GNU ld 677 *GNU*) # GNU ld
566 echo "-Wl,-z,now" ;; 678 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 679 esac
577} 680}
578 681
579 682fi
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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