/[gentoo-x86]/eclass/flag-o-matic.eclass
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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 1.167 2012/01/14 09:10:54 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() 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# 18# Return all the flag variables that our high level funcs operate on.
11#### filter-flags <flags> #### 19all-flag-vars() {
12# Remove particular flags from C[XX]FLAGS 20 echo {C,CPP,CXX,F,FC,LD}FLAGS
13# Matches only complete flags 21}
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 ################
66# The following are still present to avoid breaking existing
67# code more than necessary; however they are deprecated. Please
68# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# need to know which hardened techs are active in the compiler.
70# See bug #100974
71#
72#### has_hardened ####
73# Returns true if the compiler has 'Hardened' in its version string,
74# (note; switched-spec vanilla compilers satisfy this condition) or
75# the specs file name contains 'hardened'.
76#
77#### has_pie ####
78# Returns true if the compiler by default or with current CFLAGS
79# builds position-independent code.
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 ####
86# Returns true if the compiler by default or with current CFLAGS
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 22
94# C[XX]FLAGS that we allow in strip-flags 23# {C,CXX,F,FC}FLAGS that we allow in strip-flags
95# Note: shell globs and character lists are allowed 24# Note: shell globs and character lists are allowed
96setup-allowed-flags() { 25setup-allowed-flags() {
97 if [[ -z ${ALLOWED_FLAGS} ]] ; then
98 export ALLOWED_FLAGS="-pipe" 26 ALLOWED_FLAGS="-pipe"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 27 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 28 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 29 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 30 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+" 31 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
104 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 32 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
105 fi 33 ALLOWED_FLAGS+=" -W* -w"
34
106 # allow a bunch of flags that negate features / control ABI 35 # allow a bunch of flags that negate features / control ABI
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 36 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
37 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
38 -fno-omit-frame-pointer"
108 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 39 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
109 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 40 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
41 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
110 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 42 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
111 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 43 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
112 -mieee -mieee-with-inexact -mschedule \ 44 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
113 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 45 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
114 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 46 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
115 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 47 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
116 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 48 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
117 -msecure-plt -D*"
118 49
119 # C[XX]FLAGS that we are think is ok, but needs testing 50 # 4.5
120 # NOTE: currently -Os have issues with gcc3 and K6* arch's 51 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
121 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 52 # 4.6
53 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
54
55 export ALLOWED_FLAGS
122 return 0 56 return 0
123} 57}
124 58
125# inverted filters for hardened compiler. This is trying to unpick 59# inverted filters for hardened compiler. This is trying to unpick
126# the hardened compiler defaults. 60# the hardened compiler defaults.
134 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 68 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
135 gcc-specs-pie || continue 69 gcc-specs-pie || continue
136 is-flagq -nopie || append-flags -nopie;; 70 is-flagq -nopie || append-flags -nopie;;
137 -fstack-protector) 71 -fstack-protector)
138 gcc-specs-ssp || continue 72 gcc-specs-ssp || continue
139 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 73 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
140 -fstack-protector-all) 74 -fstack-protector-all)
141 gcc-specs-ssp-to-all || continue 75 gcc-specs-ssp-to-all || continue
142 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 76 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
77 -fno-strict-overflow)
78 gcc-specs-nostrict || continue
79 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
143 esac 80 esac
144 done 81 done
145} 82}
146 83
147# Remove occurrences of strings from variable given in $1 84# Remove occurrences of strings from variable given in $1
148# Strings removed are matched as globs, so for example 85# Strings removed are matched as globs, so for example
149# '-O*' would remove -O1, -O2 etc. 86# '-O*' would remove -O1, -O2 etc.
150_filter-var() { 87_filter-var() {
151 local f x VAR VAL 88 local f x var=$1 new=()
152 declare -a new
153
154 VAR=$1
155 shift 89 shift
156 eval VAL=\${${VAR}} 90
157 for f in ${VAL}; do 91 for f in ${!var} ; do
158 for x in "$@"; do 92 for x in "$@" ; do
159 # Note this should work with globs like -O* 93 # Note this should work with globs like -O*
160 [[ ${f} == ${x} ]] && continue 2 94 [[ ${f} == ${x} ]] && continue 2
161 done 95 done
162 eval new\[\${\#new\[@]}]=\${f} 96 new+=( "${f}" )
163 done 97 done
164 eval export ${VAR}=\${new\[*]} 98 eval export ${var}=\""${new[*]}"\"
165} 99}
166 100
101# @FUNCTION: filter-flags
102# @USAGE: <flags>
103# @DESCRIPTION:
104# Remove particular <flags> from {C,CPP,CXX,F,FC,LD}FLAGS. Accepts shell globs.
167filter-flags() { 105filter-flags() {
168 _filter-hardened "$@" 106 _filter-hardened "$@"
107 local v
108 for v in $(all-flag-vars) ; do
169 _filter-var CFLAGS "$@" 109 _filter-var ${v} "$@"
170 _filter-var CPPFLAGS "$@" 110 done
171 _filter-var CXXFLAGS "$@"
172 return 0 111 return 0
173} 112}
174 113
114# @FUNCTION: filter-lfs-flags
115# @DESCRIPTION:
116# Remove flags that enable Large File Support.
175filter-lfs-flags() { 117filter-lfs-flags() {
176 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 118 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
119 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
120 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
121 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
122 # _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 123 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
178} 124}
179 125
126# @FUNCTION: append-cppflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Add extra <flags> to the current CPPFLAGS.
180append-cppflags() { 130append-cppflags() {
181 [[ -z $* ]] && return 0 131 [[ $# -eq 0 ]] && return 0
182 export CPPFLAGS="${CPPFLAGS} $*" 132 export CPPFLAGS="${CPPFLAGS} $*"
183 return 0 133 return 0
184} 134}
185 135
136# @FUNCTION: append-cflags
137# @USAGE: <flags>
138# @DESCRIPTION:
139# Add extra <flags> to the current CFLAGS.
140append-cflags() {
141 [[ $# -eq 0 ]] && return 0
142 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
143 return 0
144}
145
146# @FUNCTION: append-cxxflags
147# @USAGE: <flags>
148# @DESCRIPTION:
149# Add extra <flags> to the current CXXFLAGS.
150append-cxxflags() {
151 [[ $# -eq 0 ]] && return 0
152 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
153 return 0
154}
155
156# @FUNCTION: append-fflags
157# @USAGE: <flags>
158# @DESCRIPTION:
159# Add extra <flags> to the current {F,FC}FLAGS.
160append-fflags() {
161 [[ $# -eq 0 ]] && return 0
162 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
163 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
164 return 0
165}
166
167# @FUNCTION: append-lfs-flags
168# @DESCRIPTION:
169# Add flags that enable Large File Support.
186append-lfs-flags() { 170append-lfs-flags() {
187 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 171 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
172 # 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 173 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
189} 174}
190 175
176# @FUNCTION: append-flags
177# @USAGE: <flags>
178# @DESCRIPTION:
179# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
191append-flags() { 180append-flags() {
192 [[ -z $* ]] && return 0 181 [[ $# -eq 0 ]] && return 0
193 export CFLAGS="${CFLAGS} $*" 182 append-cflags "$@"
194 export CXXFLAGS="${CXXFLAGS} $*" 183 append-cxxflags "$@"
184 append-fflags "$@"
195 return 0 185 return 0
196} 186}
197 187
188# @FUNCTION: replace-flags
189# @USAGE: <old> <new>
190# @DESCRIPTION:
191# Replace the <old> flag with <new>. Accepts shell globs for <old>.
198replace-flags() { 192replace-flags() {
199 [[ $# != 2 ]] \
200 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 193 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
201 && die "replace-flags takes 2 arguments, not $#"
202 194
203 local f fset 195 local f var new
204 declare -a new_CFLAGS new_CXXFLAGS 196 for var in $(all-flag-vars) ; do
205
206 for fset in CFLAGS CXXFLAGS; do
207 # Looping over the flags instead of using a global 197 # Looping over the flags instead of using a global
208 # substitution ensures that we're working with flag atoms. 198 # substitution ensures that we're working with flag atoms.
209 # Otherwise globs like -O* have the potential to wipe out the 199 # Otherwise globs like -O* have the potential to wipe out the
210 # list of flags. 200 # list of flags.
201 new=()
211 for f in ${!fset}; do 202 for f in ${!var} ; do
212 # Note this should work with globs like -O* 203 # Note this should work with globs like -O*
213 [[ ${f} == ${1} ]] && f=${2} 204 [[ ${f} == ${1} ]] && f=${2}
214 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 205 new+=( "${f}" )
215 done
216 eval export ${fset}=\${new_${fset}\[*]}
217 done 206 done
207 eval export ${var}=\""${new[*]}"\"
208 done
218 209
219 return 0 210 return 0
220} 211}
221 212
213# @FUNCTION: replace-cpu-flags
214# @USAGE: <old> <new>
215# @DESCRIPTION:
216# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
217# with flags that select the <new> cpu. Accepts shell globs for <old>.
222replace-cpu-flags() { 218replace-cpu-flags() {
223 local newcpu="$#" ; newcpu="${!newcpu}" 219 local newcpu="$#" ; newcpu="${!newcpu}"
224 while [ $# -gt 1 ] ; do 220 while [ $# -gt 1 ] ; do
225 # quote to make sure that no globbing is done (particularly on 221 # quote to make sure that no globbing is done (particularly on
226 # ${oldcpu}) prior to calling replace-flags 222 # ${oldcpu}) prior to calling replace-flags
238 [[ ${x} == $2 ]] && return 0 234 [[ ${x} == $2 ]] && return 0
239 done 235 done
240 return 1 236 return 1
241} 237}
242 238
239# @FUNCTION: is-flagq
240# @USAGE: <flag>
241# @DESCRIPTION:
242# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
243is-flagq() { 243is-flagq() {
244 [[ -n $2 ]] && die "Usage: is-flag <flag>" 244 [[ -n $2 ]] && die "Usage: is-flag <flag>"
245 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1
246}
247 245
246 local var
247 for var in $(all-flag-vars) ; do
248 _is_flagq ${var} "$1" && return 0
249 done
250 return 1
251}
252
253# @FUNCTION: is-flag
254# @USAGE: <flag>
255# @DESCRIPTION:
256# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
248is-flag() { 257is-flag() {
249 is-flagq "$@" && echo true 258 is-flagq "$@" && echo true
250} 259}
251 260
261# @FUNCTION: is-ldflagq
262# @USAGE: <flag>
263# @DESCRIPTION:
264# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
252is-ldflagq() { 265is-ldflagq() {
253 [[ -n $2 ]] && die "Usage: is-ldflag <flag>" 266 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
254 _is_flagq LDFLAGS $1 267 _is_flagq LDFLAGS $1
255} 268}
256 269
270# @FUNCTION: is-ldflag
271# @USAGE: <flag>
272# @DESCRIPTION:
273# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
257is-ldflag() { 274is-ldflag() {
258 is-ldflagq "$@" && echo true 275 is-ldflagq "$@" && echo true
259} 276}
260 277
278# @FUNCTION: filter-mfpmath
279# @USAGE: <math types>
280# @DESCRIPTION:
281# Remove specified math types from the fpmath flag. For example, if the user
282# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
283# -mfpmath=386.
261filter-mfpmath() { 284filter-mfpmath() {
262 local orig_mfpmath new_math prune_math 285 local orig_mfpmath new_math prune_math
263 286
264 # save the original -mfpmath flag 287 # save the original -mfpmath flag
265 orig_mfpmath=$(get-flag -mfpmath) 288 orig_mfpmath=$(get-flag -mfpmath)
284 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 307 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
285 fi 308 fi
286 return 0 309 return 0
287} 310}
288 311
312# @FUNCTION: strip-flags
313# @DESCRIPTION:
314# Strip C[XX]FLAGS of everything except known good/safe flags.
289strip-flags() { 315strip-flags() {
290 local x y flag NEW_CFLAGS NEW_CXXFLAGS 316 local x y var
291 317
292 setup-allowed-flags 318 setup-allowed-flags
293 319
294 local NEW_CFLAGS=""
295 local NEW_CXXFLAGS=""
296
297 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
298 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
299 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
300 fi
301
302 set -f # disable pathname expansion 320 set -f # disable pathname expansion
303 321
304 for x in ${CFLAGS}; do 322 for var in $(all-flag-vars) ; do
323 local new=()
324
325 for x in ${!var} ; do
326 local flag=${x%%=*}
305 for y in ${ALLOWED_FLAGS}; do 327 for y in ${ALLOWED_FLAGS} ; do
306 flag=${x%%=*}
307 if [ "${flag%%${y}}" = "" ] ; then 328 if [[ -z ${flag%%${y}} ]] ; then
308 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 329 new+=( "${x}" )
309 break 330 break
310 fi 331 fi
311 done 332 done
312 done 333 done
313 334
314 for x in ${CXXFLAGS}; do
315 for y in ${ALLOWED_FLAGS}; do
316 flag=${x%%=*}
317 if [ "${flag%%${y}}" = "" ] ; then
318 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
319 break
320 fi
321 done
322 done
323
324 # In case we filtered out all optimization flags fallback to -O2 335 # In case we filtered out all optimization flags fallback to -O2
325 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 336 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
326 NEW_CFLAGS="${NEW_CFLAGS} -O2" 337 new+=( -O2 )
327 fi 338 fi
328 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 339
329 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 340 eval export ${var}=\""${new[*]}"\"
330 fi 341 done
331 342
332 set +f # re-enable pathname expansion 343 set +f # re-enable pathname expansion
333 344
334 export CFLAGS="${NEW_CFLAGS}"
335 export CXXFLAGS="${NEW_CXXFLAGS}"
336 return 0 345 return 0
337} 346}
338 347
339test-flag-PROG() { 348test-flag-PROG() {
340 local comp=$1 349 local comp=$1
341 local flags="$2" 350 local flags="$2"
342 351
343 [[ -z ${comp} || -z ${flags} ]] && \ 352 [[ -z ${comp} || -z ${flags} ]] && return 1
344 return 1
345 353
354 # use -c so we can test the assembler as well
346 local PROG=$(tc-get${comp}) 355 local PROG=$(tc-get${comp})
347 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 356 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
348 > /dev/null 2>&1 357 > /dev/null 2>&1
349} 358}
350 359
351# Returns true if C compiler support given flag 360# @FUNCTION: test-flag-CC
361# @USAGE: <flag>
362# @DESCRIPTION:
363# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
352test-flag-CC() { test-flag-PROG "CC" "$1"; } 364test-flag-CC() { test-flag-PROG "CC" "$1"; }
353 365
354# Returns true if C++ compiler support given flag 366# @FUNCTION: test-flag-CXX
367# @USAGE: <flag>
368# @DESCRIPTION:
369# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
355test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 370test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
371
372# @FUNCTION: test-flag-F77
373# @USAGE: <flag>
374# @DESCRIPTION:
375# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
376test-flag-F77() { test-flag-PROG "F77" "$1"; }
377
378# @FUNCTION: test-flag-FC
379# @USAGE: <flag>
380# @DESCRIPTION:
381# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
382test-flag-FC() { test-flag-PROG "FC" "$1"; }
356 383
357test-flags-PROG() { 384test-flags-PROG() {
358 local comp=$1 385 local comp=$1
359 local flags 386 local flags
360 local x 387 local x
361 388
362 shift 389 shift
363 390
364 [[ -z ${comp} ]] && return 1 391 [[ -z ${comp} ]] && return 1
365 392
366 x=""
367 for x in "$@" ; do 393 for x in "$@" ; do
368 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 394 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
369 done 395 done
370 396
371 echo "${flags}" 397 echo "${flags}"
372 398
373 # Just bail if we dont have any flags 399 # Just bail if we dont have any flags
374 [[ -n ${flags} ]] 400 [[ -n ${flags} ]]
375} 401}
376 402
377# Returns (echo's) the given flags supported by the C compiler 403# @FUNCTION: test-flags-CC
404# @USAGE: <flags>
405# @DESCRIPTION:
406# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
378test-flags-CC() { test-flags-PROG "CC" "$@"; } 407test-flags-CC() { test-flags-PROG "CC" "$@"; }
379 408
380# Returns (echo's) the given flags supported by the C++ compiler 409# @FUNCTION: test-flags-CXX
410# @USAGE: <flags>
411# @DESCRIPTION:
412# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
381test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 413test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
382 414
415# @FUNCTION: test-flags-F77
416# @USAGE: <flags>
417# @DESCRIPTION:
418# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
419test-flags-F77() { test-flags-PROG "F77" "$@"; }
420
421# @FUNCTION: test-flags-FC
422# @USAGE: <flags>
423# @DESCRIPTION:
424# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
425test-flags-FC() { test-flags-PROG "FC" "$@"; }
426
427# @FUNCTION: test-flags
428# @USAGE: <flags>
429# @DESCRIPTION:
383# Short-hand that should hopefully work for both C and C++ compiler, but 430# Short-hand that should hopefully work for both C and C++ compiler, but
384# its really only present due to the append-flags() abomination. 431# its really only present due to the append-flags() abomination.
385test-flags() { test-flags-CC "$@"; } 432test-flags() { test-flags-CC "$@"; }
386 433
387# Depriciated, use test-flags() 434# @FUNCTION: test_version_info
388test_flag() { 435# @USAGE: <version>
389 ewarn "test_flag: deprecated, please use test-flags()!" >&2 436# @DESCRIPTION:
390 437# Returns shell true if the current C compiler version matches <version>, else returns shell false.
391 test-flags-CC "$@" 438# Accepts shell globs.
392}
393
394test_version_info() { 439test_version_info() {
395 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 440 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
396 return 0 441 return 0
397 else 442 else
398 return 1 443 return 1
399 fi 444 fi
400} 445}
401 446
447# @FUNCTION: strip-unsupported-flags
448# @DESCRIPTION:
449# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
402strip-unsupported-flags() { 450strip-unsupported-flags() {
403 export CFLAGS=$(test-flags-CC ${CFLAGS}) 451 export CFLAGS=$(test-flags-CC ${CFLAGS})
404 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) 452 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
453 export FFLAGS=$(test-flags-F77 ${FFLAGS})
454 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
405} 455}
406 456
457# @FUNCTION: get-flag
458# @USAGE: <flag>
459# @DESCRIPTION:
460# Find and echo the value for a particular flag. Accepts shell globs.
407get-flag() { 461get-flag() {
408 local f findflag="$1" 462 local f var findflag="$1"
409 463
410 # this code looks a little flaky but seems to work for 464 # this code looks a little flaky but seems to work for
411 # everything we want ... 465 # everything we want ...
412 # for example, if CFLAGS="-march=i686": 466 # for example, if CFLAGS="-march=i686":
413 # `get-flag -march` == "-march=i686" 467 # `get-flag -march` == "-march=i686"
414 # `get-flag march` == "i686" 468 # `get-flag march` == "i686"
415 for f in ${CFLAGS} ${CXXFLAGS} ; do 469 for var in $(all-flag-vars) ; do
470 for f in ${!var} ; do
416 if [ "${f/${findflag}}" != "${f}" ] ; then 471 if [ "${f/${findflag}}" != "${f}" ] ; then
417 printf "%s\n" "${f/-${findflag}=}" 472 printf "%s\n" "${f/-${findflag}=}"
418 return 0 473 return 0
419 fi 474 fi
475 done
420 done 476 done
421 return 1 477 return 1
422} 478}
423 479
424# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 480# @FUNCTION: has_m64
425has_hardened() { 481# @DESCRIPTION:
426 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 482# This doesn't test if the flag is accepted, it tests if the flag actually
427 483# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
428 test_version_info Hardened && return 0 484# return code is 0, else the return code is 1.
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
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
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
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
468
469 # note; this matches both -fstack-protector and -fstack-protector-all
470 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
471 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
472 gcc-specs-ssp
473}
474
475has_m64() { 485has_m64() {
486 eqawarn "${FUNCNAME}: don't use this anymore"
487
476 # this doesnt test if the flag is accepted, it tests if the flag 488 # 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! 489 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
478 # please dont replace this function with test_flag in some future 490 # please dont replace this function with test_flag in some future
479 # clean-up! 491 # clean-up!
480 492
487 [[ ${ret} != 1 ]] && return 0 499 [[ ${ret} != 1 ]] && return 0
488 return 1 500 return 1
489} 501}
490 502
491has_m32() { 503has_m32() {
492 # this doesnt test if the flag is accepted, it tests if the flag 504 die "${FUNCNAME}: don't use this anymore"
493 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
494 # please dont replace this function with test_flag in some future
495 # clean-up!
496
497 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
498
499 local temp=$(emktemp)
500 echo "int main() { return(0); }" > "${temp}".c
501 MY_CC=$(tc-getCC)
502 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
503 local ret=$?
504 rm -f "${temp}".c
505 [[ ${ret} != 1 ]] && return 0
506 return 1
507} 505}
508 506
507# @FUNCTION: replace-sparc64-flags
508# @DESCRIPTION:
509# Sets mcpu to v8 and uses the original value as mtune if none specified.
509replace-sparc64-flags() { 510replace-sparc64-flags() {
510 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 511 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
511 512
512 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 513 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
513 for x in ${SPARC64_CPUS}; do 514 for x in ${SPARC64_CPUS}; do
530 fi 531 fi
531 532
532 export CFLAGS CXXFLAGS 533 export CFLAGS CXXFLAGS
533} 534}
534 535
536# @FUNCTION: append-libs
537# @USAGE: <libs>
538# @DESCRIPTION:
539# Add extra <libs> to the current LIBS.
540append-libs() {
541 [[ $# -eq 0 ]] && return 0
542 local flag
543 for flag in "$@"; do
544 [[ ${flag} == -l* ]] && flag=${flag#-l}
545 export LIBS="${LIBS} -l${flag}"
546 done
547
548 return 0
549}
550
551# @FUNCTION: append-ldflags
552# @USAGE: <flags>
553# @DESCRIPTION:
554# Add extra <flags> to the current LDFLAGS.
535append-ldflags() { 555append-ldflags() {
536 [[ -z $* ]] && return 0 556 [[ $# -eq 0 ]] && return 0
557 local flag
558 for flag in "$@"; do
559 [[ ${flag} == -l* ]] && \
560 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
561 done
562
537 export LDFLAGS="${LDFLAGS} $*" 563 export LDFLAGS="${LDFLAGS} $*"
538 return 0 564 return 0
539} 565}
540 566
541# Remove flags from LDFLAGS - it's up to the ebuild to filter 567# @FUNCTION: filter-ldflags
542# CFLAGS and CXXFLAGS via filter-flags if they need to. 568# @USAGE: <flags>
569# @DESCRIPTION:
570# Remove particular <flags> from LDFLAGS. Accepts shell globs.
543filter-ldflags() { 571filter-ldflags() {
544 _filter-var LDFLAGS "$@" 572 _filter-var LDFLAGS "$@"
545 return 0 573 return 0
546} 574}
547 575
576# @FUNCTION: raw-ldflags
577# @USAGE: [flags]
578# @DESCRIPTION:
548# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 579# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
549# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 580# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
550# to gcc where it needs the '-Wl,'. 581# to gcc where it needs the '-Wl,'.
582#
583# If no flags are specified, then default to ${LDFLAGS}.
551raw-ldflags() { 584raw-ldflags() {
552 local x input="$@" 585 local x input="$@"
553 [[ -z ${input} ]] && input=${LDFLAGS} 586 [[ -z ${input} ]] && input=${LDFLAGS}
554 set -- 587 set --
555 for x in ${input} ; do 588 for x in ${input} ; do
557 set -- "$@" ${x//,/ } 590 set -- "$@" ${x//,/ }
558 done 591 done
559 echo "$@" 592 echo "$@"
560} 593}
561 594
562# Gets the flags needed for "NOW" binding 595# @FUNCTION: no-as-needed
563bindnow-flags() { 596# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
597no-as-needed() {
564 case $($(tc-getLD) -v 2>&1 </dev/null) in 598 case $($(tc-getLD) -v 2>&1 </dev/null) in
565 *GNU* | *'with BFD'*) # GNU ld 599 *GNU*) # GNU ld
566 echo "-Wl,-z,now" ;; 600 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 601 esac
577} 602}
578 603
579 604fi
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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