/[gentoo-x86]/eclass/flag-o-matic.eclass
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1# Copyright 1999-2007 Gentoo Foundation 1# Copyright 1999-2009 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.117 2007/03/04 21:13:17 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.132 2009/01/21 00:42:20 gengor Exp $
4# 4
5# @ECLASS: flag-o-matic.eclass
6# @MAINTAINER:
5# Maintainer: toolchain@gentoo.org 7# toolchain@gentoo.org
8# @BLURB: common functions to manipulate and query toolchain flags
9# @DESCRIPTION:
10# This eclass contains a suite of functions to help developers sanely
11# and safely manage toolchain flags in their builds.
6 12
7# need access to emktemp()
8inherit eutils toolchain-funcs multilib 13inherit eutils toolchain-funcs multilib
9 14
10#
11#### filter-flags <flags> ####
12# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags
14#
15#### append-flags <flags> ####
16# Add extra flags to your current C[XX]FLAGS
17#
18#### replace-flags <orig.flag> <new.flag> ###
19# Replace a flag by another one
20#
21#### replace-cpu-flags <old.cpus> <new.cpu> ###
22# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu>
24#
25#### is-flag[q] <flag> ####
26# Returns "true" if flag is set in C[XX]FLAGS
27# Matches only complete a flag
28# q version sets return code but doesn't echo
29#
30#### is-ldflag[q] <flag> ####
31# Returns "true" if flag is set in LDFLAGS
32# Matches only complete a flag
33# q version sets return code but doesn't echo
34#
35#### strip-flags ####
36# Strip C[XX]FLAGS of everything except known
37# good options.
38#
39#### strip-unsupported-flags ####
40# Strip C[XX]FLAGS of any flags not supported by
41# installed version of gcc
42#
43#### get-flag <flag> ####
44# Find and echo the value for a particular flag
45#
46#### replace-sparc64-flags ####
47# Sets mcpu to v8 and uses the original value
48# as mtune if none specified.
49#
50#### filter-mfpmath <math types> ####
51# Remove specified math types from the fpmath specification
52# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
53# will leave the user with -mfpmath=386
54#
55#### append-ldflags ####
56# Add extra flags to your current LDFLAGS
57#
58#### filter-ldflags <flags> ####
59# Remove particular flags from LDFLAGS
60# Matches only complete flags
61#
62#### bindnow-flags ####
63# Returns the flags to enable "now" binding in the current selected linker.
64#
65################ DEPRECATED functions ################ 15################ DEPRECATED functions ################
66# The following are still present to avoid breaking existing 16# The following are still present to avoid breaking existing
67# code more than necessary; however they are deprecated. Please 17# code more than necessary; however they are deprecated. Please
68# use gcc-specs-* from toolchain-funcs.eclass instead, if you 18# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# need to know which hardened techs are active in the compiler. 19# need to know which hardened techs are active in the compiler.
70# See bug #100974 20# See bug #100974
71# 21#
72#### has_hardened #### 22# has_hardened
73# Returns true if the compiler has 'Hardened' in its version string, 23# has_pie
74# (note; switched-spec vanilla compilers satisfy this condition) or 24# has_pic
75# the specs file name contains 'hardened'.
76#
77#### has_pie ####
78# Returns true if the compiler by default or with current CFLAGS
79# builds position-independent code.
80#
81#### has_pic ####
82# Returns true if the compiler by default or with current CFLAGS
83# builds position-independent code.
84#
85#### has_ssp_all #### 25# has_ssp_all
86# Returns true if the compiler by default or with current CFLAGS 26# has_ssp
87# generates stack smash protections for all functions
88#
89#### has_ssp ####
90# Returns true if the compiler by default or with current CFLAGS
91# generates stack smash protections for most vulnerable functions
92#
93 27
28
94# C[XX]FLAGS that we allow in strip-flags 29# {C,CXX,F,FC}FLAGS that we allow in strip-flags
95# Note: shell globs and character lists are allowed 30# Note: shell globs and character lists are allowed
96setup-allowed-flags() { 31setup-allowed-flags() {
97 if [[ -z ${ALLOWED_FLAGS} ]] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
98 export ALLOWED_FLAGS="-pipe" 33 export ALLOWED_FLAGS="-pipe"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+" 38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
104 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
105 fi 41 fi
106 # allow a bunch of flags that negate features / control ABI 42 # allow a bunch of flags that negate features / control ABI
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow"
108 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
109 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
110 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
111 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
112 -mieee -mieee-with-inexact -mschedule \ 49 -mieee -mieee-with-inexact -mschedule \
113 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
114 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
115 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
116 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
117 -msecure-plt -D*" 54 -msecure-plt -m*-toc -D* -U*"
118 55
119 # C[XX]FLAGS that we are think is ok, but needs testing 56 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
120 # NOTE: currently -Os have issues with gcc3 and K6* arch's 57 # NOTE: currently -Os have issues with gcc3 and K6* arch's
121 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
122 return 0 59 return 0
123} 60}
124 61
134 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 71 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
135 gcc-specs-pie || continue 72 gcc-specs-pie || continue
136 is-flagq -nopie || append-flags -nopie;; 73 is-flagq -nopie || append-flags -nopie;;
137 -fstack-protector) 74 -fstack-protector)
138 gcc-specs-ssp || continue 75 gcc-specs-ssp || continue
139 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 76 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
140 -fstack-protector-all) 77 -fstack-protector-all)
141 gcc-specs-ssp-to-all || continue 78 gcc-specs-ssp-to-all || continue
142 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 79 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
80 -fno-strict-overflow)
81 gcc-specs-nostrict || continue
82 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
143 esac 83 esac
144 done 84 done
145} 85}
146 86
147# Remove occurrences of strings from variable given in $1 87# Remove occurrences of strings from variable given in $1
162 eval new\[\${\#new\[@]}]=\${f} 102 eval new\[\${\#new\[@]}]=\${f}
163 done 103 done
164 eval export ${VAR}=\${new\[*]} 104 eval export ${VAR}=\${new\[*]}
165} 105}
166 106
107# @FUNCTION: filter-flags
108# @USAGE: <flags>
109# @DESCRIPTION:
110# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
167filter-flags() { 111filter-flags() {
168 _filter-hardened "$@" 112 _filter-hardened "$@"
169 _filter-var CFLAGS "$@" 113 _filter-var CFLAGS "$@"
114 _filter-var CPPFLAGS "$@"
170 _filter-var CXXFLAGS "$@" 115 _filter-var CXXFLAGS "$@"
116 _filter-var FFLAGS "$@"
117 _filter-var FCFLAGS "$@"
171 return 0 118 return 0
172} 119}
173 120
121# @FUNCTION: filter-lfs-flags
122# @DESCRIPTION:
123# Remove flags that enable Large File Support.
174filter-lfs-flags() { 124filter-lfs-flags() {
175 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 125 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
176 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 126 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
177} 127}
178 128
129# @FUNCTION: append-cppflags
130# @USAGE: <flags>
131# @DESCRIPTION:
132# Add extra <flags> to the current CPPFLAGS.
133append-cppflags() {
134 [[ -z $* ]] && return 0
135 export CPPFLAGS="${CPPFLAGS} $*"
136 return 0
137}
138
139# @FUNCTION: append-cxxflags
140# @USAGE: <flags>
141# @DESCRIPTION:
142# Add extra <flags> to the current CXXFLAGS.
143append-cxxflags() {
144 [[ -z $* ]] && return 0
145 export CXXFLAGS="${CXXFLAGS} $*"
146 return 0
147}
148
149# @FUNCTION: append-fflags
150# @USAGE: <flags>
151# @DESCRIPTION:
152# Add extra <flags> to the current {F,FC}FLAGS.
153append-fflags() {
154 [[ -z $* ]] && return 0
155 export FFLAGS="${FFLAGS} $*"
156 export FCFLAGS="${FCFLAGS} $*"
157 return 0
158}
159
160# @FUNCTION: append-lfs-flags
161# @DESCRIPTION:
162# Add flags that enable Large File Support.
179append-lfs-flags() { 163append-lfs-flags() {
180 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 164 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
181 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 165 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
182} 166}
183 167
168# @FUNCTION: append-flags
169# @USAGE: <flags>
170# @DESCRIPTION:
171# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
184append-flags() { 172append-flags() {
185 [[ -z $* ]] && return 0 173 [[ -z $* ]] && return 0
186 export CFLAGS="${CFLAGS} $*" 174 export CFLAGS="${CFLAGS} $*"
187 export CXXFLAGS="${CXXFLAGS} $*" 175 export CXXFLAGS="${CXXFLAGS} $*"
176 export FFLAGS="${FFLAGS} $*"
177 export FCFLAGS="${FCFLAGS} $*"
188 return 0 178 return 0
189} 179}
190 180
181# @FUNCTION: replace-flags
182# @USAGE: <old> <new>
183# @DESCRIPTION:
184# Replace the <old> flag with <new>. Accepts shell globs for <old>.
191replace-flags() { 185replace-flags() {
192 [[ $# != 2 ]] \ 186 [[ $# != 2 ]] \
193 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 187 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
194 && die "replace-flags takes 2 arguments, not $#" 188 && die "replace-flags takes 2 arguments, not $#"
195 189
196 local f fset 190 local f fset
197 declare -a new_CFLAGS new_CXXFLAGS 191 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
198 192
199 for fset in CFLAGS CXXFLAGS; do 193 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
200 # Looping over the flags instead of using a global 194 # Looping over the flags instead of using a global
201 # substitution ensures that we're working with flag atoms. 195 # substitution ensures that we're working with flag atoms.
202 # Otherwise globs like -O* have the potential to wipe out the 196 # Otherwise globs like -O* have the potential to wipe out the
203 # list of flags. 197 # list of flags.
204 for f in ${!fset}; do 198 for f in ${!fset}; do
210 done 204 done
211 205
212 return 0 206 return 0
213} 207}
214 208
209# @FUNCTION: replace-cpu-flags
210# @USAGE: <old> <new>
211# @DESCRIPTION:
212# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
213# with flags that select the <new> cpu. Accepts shell globs for <old>.
215replace-cpu-flags() { 214replace-cpu-flags() {
216 local newcpu="$#" ; newcpu="${!newcpu}" 215 local newcpu="$#" ; newcpu="${!newcpu}"
217 while [ $# -gt 1 ] ; do 216 while [ $# -gt 1 ] ; do
218 # quote to make sure that no globbing is done (particularly on 217 # quote to make sure that no globbing is done (particularly on
219 # ${oldcpu}) prior to calling replace-flags 218 # ${oldcpu}) prior to calling replace-flags
231 [[ ${x} == $2 ]] && return 0 230 [[ ${x} == $2 ]] && return 0
232 done 231 done
233 return 1 232 return 1
234} 233}
235 234
235# @FUNCTION: is-flagq
236# @USAGE: <flag>
237# @DESCRIPTION:
238# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
236is-flagq() { 239is-flagq() {
237 [[ -n $2 ]] && die "Usage: is-flag <flag>" 240 [[ -n $2 ]] && die "Usage: is-flag <flag>"
238 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 241 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
239} 242}
240 243
244# @FUNCTION: is-flag
245# @USAGE: <flag>
246# @DESCRIPTION:
247# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
241is-flag() { 248is-flag() {
242 is-flagq "$@" && echo true 249 is-flagq "$@" && echo true
243} 250}
244 251
252# @FUNCTION: is-ldflagq
253# @USAGE: <flag>
254# @DESCRIPTION:
255# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
245is-ldflagq() { 256is-ldflagq() {
246 [[ -n $2 ]] && die "Usage: is-ldflag <flag>" 257 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
247 _is_flagq LDFLAGS $1 258 _is_flagq LDFLAGS $1
248} 259}
249 260
261# @FUNCTION: is-ldflag
262# @USAGE: <flag>
263# @DESCRIPTION:
264# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
250is-ldflag() { 265is-ldflag() {
251 is-ldflagq "$@" && echo true 266 is-ldflagq "$@" && echo true
252} 267}
253 268
269# @FUNCTION: filter-mfpmath
270# @USAGE: <math types>
271# @DESCRIPTION:
272# Remove specified math types from the fpmath flag. For example, if the user
273# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
274# -mfpmath=386.
254filter-mfpmath() { 275filter-mfpmath() {
255 local orig_mfpmath new_math prune_math 276 local orig_mfpmath new_math prune_math
256 277
257 # save the original -mfpmath flag 278 # save the original -mfpmath flag
258 orig_mfpmath=$(get-flag -mfpmath) 279 orig_mfpmath=$(get-flag -mfpmath)
277 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 298 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
278 fi 299 fi
279 return 0 300 return 0
280} 301}
281 302
303# @FUNCTION: strip-flags
304# @DESCRIPTION:
305# Strip C[XX]FLAGS of everything except known good/safe flags.
282strip-flags() { 306strip-flags() {
283 local x y flag NEW_CFLAGS NEW_CXXFLAGS 307 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
284 308
285 setup-allowed-flags 309 setup-allowed-flags
286 310
287 local NEW_CFLAGS="" 311 local NEW_CFLAGS=""
288 local NEW_CXXFLAGS="" 312 local NEW_CXXFLAGS=""
313 local NEW_FFLAGS=""
314 local NEW_FCFLAGS=""
289 315
290 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 316 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
291 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 317 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
292 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 318 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
293 fi 319 fi
312 break 338 break
313 fi 339 fi
314 done 340 done
315 done 341 done
316 342
343 for x in ${FFLAGS}; do
344 for y in ${ALLOWED_FLAGS}; do
345 flag=${x%%=*}
346 if [ "${flag%%${y}}" = "" ] ; then
347 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
348 break
349 fi
350 done
351 done
352
353 for x in ${FCFLAGS}; do
354 for y in ${ALLOWED_FLAGS}; do
355 flag=${x%%=*}
356 if [ "${flag%%${y}}" = "" ] ; then
357 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
358 break
359 fi
360 done
361 done
362
317 # In case we filtered out all optimization flags fallback to -O2 363 # In case we filtered out all optimization flags fallback to -O2
318 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 364 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
319 NEW_CFLAGS="${NEW_CFLAGS} -O2" 365 NEW_CFLAGS="${NEW_CFLAGS} -O2"
320 fi 366 fi
321 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 367 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
322 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 368 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
323 fi 369 fi
370 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
371 NEW_FFLAGS="${NEW_FFLAGS} -O2"
372 fi
373 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
374 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
375 fi
324 376
325 set +f # re-enable pathname expansion 377 set +f # re-enable pathname expansion
326 378
327 export CFLAGS="${NEW_CFLAGS}" 379 export CFLAGS="${NEW_CFLAGS}"
328 export CXXFLAGS="${NEW_CXXFLAGS}" 380 export CXXFLAGS="${NEW_CXXFLAGS}"
381 export FFLAGS="${NEW_FFLAGS}"
382 export FCFLAGS="${NEW_FCFLAGS}"
329 return 0 383 return 0
330} 384}
331 385
332test-flag-PROG() { 386test-flag-PROG() {
333 local comp=$1 387 local comp=$1
339 local PROG=$(tc-get${comp}) 393 local PROG=$(tc-get${comp})
340 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 394 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
341 > /dev/null 2>&1 395 > /dev/null 2>&1
342} 396}
343 397
344# Returns true if C compiler support given flag 398# @FUNCTION: test-flag-CC
399# @USAGE: <flag>
400# @DESCRIPTION:
401# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
345test-flag-CC() { test-flag-PROG "CC" "$1"; } 402test-flag-CC() { test-flag-PROG "CC" "$1"; }
346 403
347# Returns true if C++ compiler support given flag 404# @FUNCTION: test-flag-CXX
405# @USAGE: <flag>
406# @DESCRIPTION:
407# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
348test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 408test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
409
410# @FUNCTION: test-flag-F77
411# @USAGE: <flag>
412# @DESCRIPTION:
413# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
414test-flag-F77() { test-flag-PROG "F77" "$1"; }
415
416# @FUNCTION: test-flag-FC
417# @USAGE: <flag>
418# @DESCRIPTION:
419# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
420test-flag-FC() { test-flag-PROG "FC" "$1"; }
349 421
350test-flags-PROG() { 422test-flags-PROG() {
351 local comp=$1 423 local comp=$1
352 local flags 424 local flags
353 local x 425 local x
365 437
366 # Just bail if we dont have any flags 438 # Just bail if we dont have any flags
367 [[ -n ${flags} ]] 439 [[ -n ${flags} ]]
368} 440}
369 441
370# Returns (echo's) the given flags supported by the C compiler 442# @FUNCTION: test-flags-CC
443# @USAGE: <flags>
444# @DESCRIPTION:
445# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
371test-flags-CC() { test-flags-PROG "CC" "$@"; } 446test-flags-CC() { test-flags-PROG "CC" "$@"; }
372 447
373# Returns (echo's) the given flags supported by the C++ compiler 448# @FUNCTION: test-flags-CXX
449# @USAGE: <flags>
450# @DESCRIPTION:
451# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
374test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 452test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
375 453
454# @FUNCTION: test-flags-F77
455# @USAGE: <flags>
456# @DESCRIPTION:
457# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
458test-flags-F77() { test-flags-PROG "F77" "$@"; }
459
460# @FUNCTION: test-flags-FC
461# @USAGE: <flags>
462# @DESCRIPTION:
463# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
464test-flags-FC() { test-flags-PROG "FC" "$@"; }
465
466# @FUNCTION: test-flags
467# @USAGE: <flags>
468# @DESCRIPTION:
376# Short-hand that should hopefully work for both C and C++ compiler, but 469# Short-hand that should hopefully work for both C and C++ compiler, but
377# its really only present due to the append-flags() abomination. 470# its really only present due to the append-flags() abomination.
378test-flags() { test-flags-CC "$@"; } 471test-flags() { test-flags-CC "$@"; }
379 472
380# Depriciated, use test-flags() 473# @FUNCTION: test_flag
474# @DESCRIPTION:
475# DEPRICIATED, use test-flags()
381test_flag() { 476test_flag() {
382 ewarn "test_flag: deprecated, please use test-flags()!" >&2 477 ewarn "test_flag: deprecated, please use test-flags()!" >&2
383 478
384 test-flags-CC "$@" 479 test-flags-CC "$@"
385} 480}
386 481
482# @FUNCTION: test_version_info
483# @USAGE: <version>
484# @DESCRIPTION:
485# Returns shell true if the current C compiler version matches <version>, else returns shell false.
486# Accepts shell globs.
387test_version_info() { 487test_version_info() {
388 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 488 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
389 return 0 489 return 0
390 else 490 else
391 return 1 491 return 1
392 fi 492 fi
393} 493}
394 494
495# @FUNCTION: strip-unsupported-flags
496# @DESCRIPTION:
497# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
395strip-unsupported-flags() { 498strip-unsupported-flags() {
396 export CFLAGS=$(test-flags-CC ${CFLAGS}) 499 export CFLAGS=$(test-flags-CC ${CFLAGS})
397 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) 500 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
501 export FFLAGS=$(test-flags-F77 ${FFLAGS})
502 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
398} 503}
399 504
505# @FUNCTION: get-flag
506# @USAGE: <flag>
507# @DESCRIPTION:
508# Find and echo the value for a particular flag. Accepts shell globs.
400get-flag() { 509get-flag() {
401 local f findflag="$1" 510 local f findflag="$1"
402 511
403 # this code looks a little flaky but seems to work for 512 # this code looks a little flaky but seems to work for
404 # everything we want ... 513 # everything we want ...
405 # for example, if CFLAGS="-march=i686": 514 # for example, if CFLAGS="-march=i686":
406 # `get-flag -march` == "-march=i686" 515 # `get-flag -march` == "-march=i686"
407 # `get-flag march` == "i686" 516 # `get-flag march` == "i686"
408 for f in ${CFLAGS} ${CXXFLAGS} ; do 517 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
409 if [ "${f/${findflag}}" != "${f}" ] ; then 518 if [ "${f/${findflag}}" != "${f}" ] ; then
410 printf "%s\n" "${f/-${findflag}=}" 519 printf "%s\n" "${f/-${findflag}=}"
411 return 0 520 return 0
412 fi 521 fi
413 done 522 done
414 return 1 523 return 1
415} 524}
416 525
526# @FUNCTION: has_hardened
527# @DESCRIPTION:
417# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 528# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
418has_hardened() { 529has_hardened() {
419 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 530 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
420 531
421 test_version_info Hardened && return 0 532 test_version_info Hardened && return 0
422 # The specs file wont exist unless gcc has GCC_SPECS support 533 # The specs file wont exist unless gcc has GCC_SPECS support
423 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 534 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
424} 535}
425 536
537# @FUNCTION: has_pic
538# @DESCRIPTION:
426# DEPRECATED - use gcc-specs-pie from toolchain-funcs 539# DEPRECATED - use gcc-specs-pie from toolchain-funcs
427# indicate whether PIC is set 540# indicate whether PIC is set
428has_pic() { 541has_pic() {
429 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 542 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
430 543
431 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 544 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
432 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \ 545 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
433 gcc-specs-pie 546 gcc-specs-pie
434} 547}
435 548
549# @FUNCTION: has_pie
550# @DESCRIPTION:
436# DEPRECATED - use gcc-specs-pie from toolchain-funcs 551# DEPRECATED - use gcc-specs-pie from toolchain-funcs
437# indicate whether PIE is set 552# indicate whether PIE is set
438has_pie() { 553has_pie() {
439 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 554 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
440 555
441 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 556 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
442 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \ 557 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
443 gcc-specs-pie 558 gcc-specs-pie
444} 559}
445 560
561# @FUNCTION: has_ssp_all
562# @DESCRIPTION:
446# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 563# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
447# indicate whether code for SSP is being generated for all functions 564# indicate whether code for SSP is being generated for all functions
448has_ssp_all() { 565has_ssp_all() {
449 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 566 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
450 567
451 # note; this matches only -fstack-protector-all 568 # note; this matches only -fstack-protector-all
452 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 569 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
453 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 570 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
454 gcc-specs-ssp-all 571 gcc-specs-ssp-to-all
455} 572}
456 573
574# @FUNCTION: has_ssp
575# @DESCRIPTION:
457# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 576# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
458# indicate whether code for SSP is being generated 577# indicate whether code for SSP is being generated
459has_ssp() { 578has_ssp() {
460 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 579 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
461 580
463 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 582 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
464 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 583 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
465 gcc-specs-ssp 584 gcc-specs-ssp
466} 585}
467 586
587# @FUNCTION: has_m64
588# @DESCRIPTION:
589# This doesn't test if the flag is accepted, it tests if the flag actually
590# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
591# return code is 0, else the return code is 1.
468has_m64() { 592has_m64() {
469 # this doesnt test if the flag is accepted, it tests if the flag 593 # this doesnt test if the flag is accepted, it tests if the flag
470 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 594 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
471 # please dont replace this function with test_flag in some future 595 # please dont replace this function with test_flag in some future
472 # clean-up! 596 # clean-up!
479 rm -f "${temp}".c 603 rm -f "${temp}".c
480 [[ ${ret} != 1 ]] && return 0 604 [[ ${ret} != 1 ]] && return 0
481 return 1 605 return 1
482} 606}
483 607
608# @FUNCTION: has_m32
609# @DESCRIPTION:
610# This doesn't test if the flag is accepted, it tests if the flag actually
611# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
612# code is 0, else return code is 1.
484has_m32() { 613has_m32() {
485 # this doesnt test if the flag is accepted, it tests if the flag 614 # this doesnt test if the flag is accepted, it tests if the flag
486 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 615 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
487 # please dont replace this function with test_flag in some future 616 # please dont replace this function with test_flag in some future
488 # clean-up! 617 # clean-up!
497 rm -f "${temp}".c 626 rm -f "${temp}".c
498 [[ ${ret} != 1 ]] && return 0 627 [[ ${ret} != 1 ]] && return 0
499 return 1 628 return 1
500} 629}
501 630
631# @FUNCTION: replace-sparc64-flags
632# @DESCRIPTION:
633# Sets mcpu to v8 and uses the original value as mtune if none specified.
502replace-sparc64-flags() { 634replace-sparc64-flags() {
503 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 635 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
504 636
505 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 637 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
506 for x in ${SPARC64_CPUS}; do 638 for x in ${SPARC64_CPUS}; do
523 fi 655 fi
524 656
525 export CFLAGS CXXFLAGS 657 export CFLAGS CXXFLAGS
526} 658}
527 659
660# @FUNCTION: append-ldflags
661# @USAGE: <flags>
662# @DESCRIPTION:
663# Add extra <flags> to the current LDFLAGS.
528append-ldflags() { 664append-ldflags() {
529 [[ -z $* ]] && return 0 665 [[ -z $* ]] && return 0
666 local flag
667 for flag in "$@"; do
668 [[ ${flag} == -l* ]] && \
669 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
670 done
671
530 export LDFLAGS="${LDFLAGS} $*" 672 export LDFLAGS="${LDFLAGS} $*"
531 return 0 673 return 0
532} 674}
533 675
534# Remove flags from LDFLAGS - it's up to the ebuild to filter 676# @FUNCTION: filter-ldflags
535# CFLAGS and CXXFLAGS via filter-flags if they need to. 677# @USAGE: <flags>
678# @DESCRIPTION:
679# Remove particular <flags> from LDFLAGS. Accepts shell globs.
536filter-ldflags() { 680filter-ldflags() {
537 _filter-var LDFLAGS "$@" 681 _filter-var LDFLAGS "$@"
538 return 0 682 return 0
539} 683}
540 684
685# @FUNCTION: raw-ldflags
686# @USAGE: <flags>
687# @DESCRIPTION:
541# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 688# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
542# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 689# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
543# to gcc where it needs the '-Wl,'. 690# to gcc where it needs the '-Wl,'.
544raw-ldflags() { 691raw-ldflags() {
545 local x input="$@" 692 local x input="$@"
550 set -- "$@" ${x//,/ } 697 set -- "$@" ${x//,/ }
551 done 698 done
552 echo "$@" 699 echo "$@"
553} 700}
554 701
702# @FUNCTION: bindnow-flags
703# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
704# @DESCRIPTION:
555# Gets the flags needed for "NOW" binding 705# DEPRECATED - Gets the flags needed for "NOW" binding
556bindnow-flags() { 706bindnow-flags() {
557 case $($(tc-getLD) -v 2>&1 </dev/null) in 707 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild"
558 *GNU* | *'with BFD'*) # GNU ld
559 echo "-Wl,-z,now" ;;
560 *Apple*) # Darwin ld
561 echo "-bind_at_load" ;;
562 *)
563 # Some linkers just recognize -V instead of -v
564 case $($(tc-getLD) -V 2>&1 </dev/null) in
565 *Solaris*) # Solaris accept almost the same GNU options
566 echo "-Wl,-z,now" ;;
567 esac
568 ;;
569 esac
570} 708}
571 709
572 710
573# Some tests for when we screw with things and want to make 711# Some tests for when we screw with things and want to make
574# sure we didn't break anything 712# sure we didn't break anything

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