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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 1.119 2007/05/12 11:45:51 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.133 2009/04/04 17:57:54 grobian 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" 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 \
108 -fno-strict-aliasing -fno-bounds-checking" 44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow"
109 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
110 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
111 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
112 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
113 -mieee -mieee-with-inexact -mschedule \ 49 -mieee -mieee-with-inexact -mschedule \
114 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
115 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
116 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
117 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
118 -msecure-plt -D*" 54 -msecure-plt -m*-toc -D* -U*"
55
56 # killing these two on OSX/Intel will disable SSE, resulting in failing
57 # compilations, as the headers expect SSE to be enabled (Apple knows what
58 # hardware they run on afterall, don't they?)
59 [[ ${CHOST} == i?86-apple-darwin* ]] \
60 && ALLOWED_FLAGS="${ALLOWED_FLAGS} -march=prescott -march=nocona"
119 61
120 # C[XX]FLAGS that we are think is ok, but needs testing 62 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
121 # NOTE: currently -Os have issues with gcc3 and K6* arch's 63 # NOTE: currently -Os have issues with gcc3 and K6* arch's
122 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 64 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
123 return 0 65 return 0
124} 66}
125 67
135 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 77 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
136 gcc-specs-pie || continue 78 gcc-specs-pie || continue
137 is-flagq -nopie || append-flags -nopie;; 79 is-flagq -nopie || append-flags -nopie;;
138 -fstack-protector) 80 -fstack-protector)
139 gcc-specs-ssp || continue 81 gcc-specs-ssp || continue
140 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 82 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
141 -fstack-protector-all) 83 -fstack-protector-all)
142 gcc-specs-ssp-to-all || continue 84 gcc-specs-ssp-to-all || continue
143 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 85 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
86 -fno-strict-overflow)
87 gcc-specs-nostrict || continue
88 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
144 esac 89 esac
145 done 90 done
146} 91}
147 92
148# Remove occurrences of strings from variable given in $1 93# Remove occurrences of strings from variable given in $1
163 eval new\[\${\#new\[@]}]=\${f} 108 eval new\[\${\#new\[@]}]=\${f}
164 done 109 done
165 eval export ${VAR}=\${new\[*]} 110 eval export ${VAR}=\${new\[*]}
166} 111}
167 112
113# @FUNCTION: filter-flags
114# @USAGE: <flags>
115# @DESCRIPTION:
116# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
168filter-flags() { 117filter-flags() {
169 _filter-hardened "$@" 118 _filter-hardened "$@"
170 _filter-var CFLAGS "$@" 119 _filter-var CFLAGS "$@"
171 _filter-var CPPFLAGS "$@" 120 _filter-var CPPFLAGS "$@"
172 _filter-var CXXFLAGS "$@" 121 _filter-var CXXFLAGS "$@"
122 _filter-var FFLAGS "$@"
123 _filter-var FCFLAGS "$@"
173 return 0 124 return 0
174} 125}
175 126
127# @FUNCTION: filter-lfs-flags
128# @DESCRIPTION:
129# Remove flags that enable Large File Support.
176filter-lfs-flags() { 130filter-lfs-flags() {
177 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 131 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
178 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 132 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
179} 133}
180 134
135# @FUNCTION: append-cppflags
136# @USAGE: <flags>
137# @DESCRIPTION:
138# Add extra <flags> to the current CPPFLAGS.
181append-cppflags() { 139append-cppflags() {
182 [[ -z $* ]] && return 0 140 [[ -z $* ]] && return 0
183 export CPPFLAGS="${CPPFLAGS} $*" 141 export CPPFLAGS="${CPPFLAGS} $*"
184 return 0 142 return 0
185} 143}
186 144
145# @FUNCTION: append-cxxflags
146# @USAGE: <flags>
147# @DESCRIPTION:
148# Add extra <flags> to the current CXXFLAGS.
149append-cxxflags() {
150 [[ -z $* ]] && return 0
151 export CXXFLAGS="${CXXFLAGS} $*"
152 return 0
153}
154
155# @FUNCTION: append-fflags
156# @USAGE: <flags>
157# @DESCRIPTION:
158# Add extra <flags> to the current {F,FC}FLAGS.
159append-fflags() {
160 [[ -z $* ]] && return 0
161 export FFLAGS="${FFLAGS} $*"
162 export FCFLAGS="${FCFLAGS} $*"
163 return 0
164}
165
166# @FUNCTION: append-lfs-flags
167# @DESCRIPTION:
168# Add flags that enable Large File Support.
187append-lfs-flags() { 169append-lfs-flags() {
188 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 170 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
189 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 171 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
190} 172}
191 173
174# @FUNCTION: append-flags
175# @USAGE: <flags>
176# @DESCRIPTION:
177# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
192append-flags() { 178append-flags() {
193 [[ -z $* ]] && return 0 179 [[ -z $* ]] && return 0
194 export CFLAGS="${CFLAGS} $*" 180 export CFLAGS="${CFLAGS} $*"
195 export CXXFLAGS="${CXXFLAGS} $*" 181 export CXXFLAGS="${CXXFLAGS} $*"
182 export FFLAGS="${FFLAGS} $*"
183 export FCFLAGS="${FCFLAGS} $*"
196 return 0 184 return 0
197} 185}
198 186
187# @FUNCTION: replace-flags
188# @USAGE: <old> <new>
189# @DESCRIPTION:
190# Replace the <old> flag with <new>. Accepts shell globs for <old>.
199replace-flags() { 191replace-flags() {
200 [[ $# != 2 ]] \ 192 [[ $# != 2 ]] \
201 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 193 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
202 && die "replace-flags takes 2 arguments, not $#" 194 && die "replace-flags takes 2 arguments, not $#"
203 195
204 local f fset 196 local f fset
205 declare -a new_CFLAGS new_CXXFLAGS 197 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
206 198
207 for fset in CFLAGS CXXFLAGS; do 199 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
208 # Looping over the flags instead of using a global 200 # Looping over the flags instead of using a global
209 # substitution ensures that we're working with flag atoms. 201 # substitution ensures that we're working with flag atoms.
210 # Otherwise globs like -O* have the potential to wipe out the 202 # Otherwise globs like -O* have the potential to wipe out the
211 # list of flags. 203 # list of flags.
212 for f in ${!fset}; do 204 for f in ${!fset}; do
218 done 210 done
219 211
220 return 0 212 return 0
221} 213}
222 214
215# @FUNCTION: replace-cpu-flags
216# @USAGE: <old> <new>
217# @DESCRIPTION:
218# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
219# with flags that select the <new> cpu. Accepts shell globs for <old>.
223replace-cpu-flags() { 220replace-cpu-flags() {
224 local newcpu="$#" ; newcpu="${!newcpu}" 221 local newcpu="$#" ; newcpu="${!newcpu}"
225 while [ $# -gt 1 ] ; do 222 while [ $# -gt 1 ] ; do
226 # quote to make sure that no globbing is done (particularly on 223 # quote to make sure that no globbing is done (particularly on
227 # ${oldcpu}) prior to calling replace-flags 224 # ${oldcpu}) prior to calling replace-flags
239 [[ ${x} == $2 ]] && return 0 236 [[ ${x} == $2 ]] && return 0
240 done 237 done
241 return 1 238 return 1
242} 239}
243 240
241# @FUNCTION: is-flagq
242# @USAGE: <flag>
243# @DESCRIPTION:
244# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
244is-flagq() { 245is-flagq() {
245 [[ -n $2 ]] && die "Usage: is-flag <flag>" 246 [[ -n $2 ]] && die "Usage: is-flag <flag>"
246 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 247 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
247} 248}
248 249
250# @FUNCTION: is-flag
251# @USAGE: <flag>
252# @DESCRIPTION:
253# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
249is-flag() { 254is-flag() {
250 is-flagq "$@" && echo true 255 is-flagq "$@" && echo true
251} 256}
252 257
258# @FUNCTION: is-ldflagq
259# @USAGE: <flag>
260# @DESCRIPTION:
261# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
253is-ldflagq() { 262is-ldflagq() {
254 [[ -n $2 ]] && die "Usage: is-ldflag <flag>" 263 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
255 _is_flagq LDFLAGS $1 264 _is_flagq LDFLAGS $1
256} 265}
257 266
267# @FUNCTION: is-ldflag
268# @USAGE: <flag>
269# @DESCRIPTION:
270# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
258is-ldflag() { 271is-ldflag() {
259 is-ldflagq "$@" && echo true 272 is-ldflagq "$@" && echo true
260} 273}
261 274
275# @FUNCTION: filter-mfpmath
276# @USAGE: <math types>
277# @DESCRIPTION:
278# Remove specified math types from the fpmath flag. For example, if the user
279# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
280# -mfpmath=386.
262filter-mfpmath() { 281filter-mfpmath() {
263 local orig_mfpmath new_math prune_math 282 local orig_mfpmath new_math prune_math
264 283
265 # save the original -mfpmath flag 284 # save the original -mfpmath flag
266 orig_mfpmath=$(get-flag -mfpmath) 285 orig_mfpmath=$(get-flag -mfpmath)
285 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 304 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
286 fi 305 fi
287 return 0 306 return 0
288} 307}
289 308
309# @FUNCTION: strip-flags
310# @DESCRIPTION:
311# Strip C[XX]FLAGS of everything except known good/safe flags.
290strip-flags() { 312strip-flags() {
291 local x y flag NEW_CFLAGS NEW_CXXFLAGS 313 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
292 314
293 setup-allowed-flags 315 setup-allowed-flags
294 316
295 local NEW_CFLAGS="" 317 local NEW_CFLAGS=""
296 local NEW_CXXFLAGS="" 318 local NEW_CXXFLAGS=""
319 local NEW_FFLAGS=""
320 local NEW_FCFLAGS=""
297 321
298 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 322 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
299 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 323 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
300 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 324 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
301 fi 325 fi
320 break 344 break
321 fi 345 fi
322 done 346 done
323 done 347 done
324 348
349 for x in ${FFLAGS}; do
350 for y in ${ALLOWED_FLAGS}; do
351 flag=${x%%=*}
352 if [ "${flag%%${y}}" = "" ] ; then
353 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
354 break
355 fi
356 done
357 done
358
359 for x in ${FCFLAGS}; do
360 for y in ${ALLOWED_FLAGS}; do
361 flag=${x%%=*}
362 if [ "${flag%%${y}}" = "" ] ; then
363 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
364 break
365 fi
366 done
367 done
368
325 # In case we filtered out all optimization flags fallback to -O2 369 # In case we filtered out all optimization flags fallback to -O2
326 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 370 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
327 NEW_CFLAGS="${NEW_CFLAGS} -O2" 371 NEW_CFLAGS="${NEW_CFLAGS} -O2"
328 fi 372 fi
329 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 373 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
330 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 374 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
331 fi 375 fi
376 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
377 NEW_FFLAGS="${NEW_FFLAGS} -O2"
378 fi
379 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
380 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
381 fi
332 382
333 set +f # re-enable pathname expansion 383 set +f # re-enable pathname expansion
334 384
335 export CFLAGS="${NEW_CFLAGS}" 385 export CFLAGS="${NEW_CFLAGS}"
336 export CXXFLAGS="${NEW_CXXFLAGS}" 386 export CXXFLAGS="${NEW_CXXFLAGS}"
387 export FFLAGS="${NEW_FFLAGS}"
388 export FCFLAGS="${NEW_FCFLAGS}"
337 return 0 389 return 0
338} 390}
339 391
340test-flag-PROG() { 392test-flag-PROG() {
341 local comp=$1 393 local comp=$1
347 local PROG=$(tc-get${comp}) 399 local PROG=$(tc-get${comp})
348 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 400 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
349 > /dev/null 2>&1 401 > /dev/null 2>&1
350} 402}
351 403
352# Returns true if C compiler support given flag 404# @FUNCTION: test-flag-CC
405# @USAGE: <flag>
406# @DESCRIPTION:
407# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
353test-flag-CC() { test-flag-PROG "CC" "$1"; } 408test-flag-CC() { test-flag-PROG "CC" "$1"; }
354 409
355# Returns true if C++ compiler support given flag 410# @FUNCTION: test-flag-CXX
411# @USAGE: <flag>
412# @DESCRIPTION:
413# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
356test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 414test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
415
416# @FUNCTION: test-flag-F77
417# @USAGE: <flag>
418# @DESCRIPTION:
419# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
420test-flag-F77() { test-flag-PROG "F77" "$1"; }
421
422# @FUNCTION: test-flag-FC
423# @USAGE: <flag>
424# @DESCRIPTION:
425# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
426test-flag-FC() { test-flag-PROG "FC" "$1"; }
357 427
358test-flags-PROG() { 428test-flags-PROG() {
359 local comp=$1 429 local comp=$1
360 local flags 430 local flags
361 local x 431 local x
373 443
374 # Just bail if we dont have any flags 444 # Just bail if we dont have any flags
375 [[ -n ${flags} ]] 445 [[ -n ${flags} ]]
376} 446}
377 447
378# Returns (echo's) the given flags supported by the C compiler 448# @FUNCTION: test-flags-CC
449# @USAGE: <flags>
450# @DESCRIPTION:
451# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
379test-flags-CC() { test-flags-PROG "CC" "$@"; } 452test-flags-CC() { test-flags-PROG "CC" "$@"; }
380 453
381# Returns (echo's) the given flags supported by the C++ compiler 454# @FUNCTION: test-flags-CXX
455# @USAGE: <flags>
456# @DESCRIPTION:
457# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
382test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 458test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
383 459
460# @FUNCTION: test-flags-F77
461# @USAGE: <flags>
462# @DESCRIPTION:
463# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
464test-flags-F77() { test-flags-PROG "F77" "$@"; }
465
466# @FUNCTION: test-flags-FC
467# @USAGE: <flags>
468# @DESCRIPTION:
469# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
470test-flags-FC() { test-flags-PROG "FC" "$@"; }
471
472# @FUNCTION: test-flags
473# @USAGE: <flags>
474# @DESCRIPTION:
384# Short-hand that should hopefully work for both C and C++ compiler, but 475# Short-hand that should hopefully work for both C and C++ compiler, but
385# its really only present due to the append-flags() abomination. 476# its really only present due to the append-flags() abomination.
386test-flags() { test-flags-CC "$@"; } 477test-flags() { test-flags-CC "$@"; }
387 478
388# Depriciated, use test-flags() 479# @FUNCTION: test_flag
480# @DESCRIPTION:
481# DEPRICIATED, use test-flags()
389test_flag() { 482test_flag() {
390 ewarn "test_flag: deprecated, please use test-flags()!" >&2 483 ewarn "test_flag: deprecated, please use test-flags()!" >&2
391 484
392 test-flags-CC "$@" 485 test-flags-CC "$@"
393} 486}
394 487
488# @FUNCTION: test_version_info
489# @USAGE: <version>
490# @DESCRIPTION:
491# Returns shell true if the current C compiler version matches <version>, else returns shell false.
492# Accepts shell globs.
395test_version_info() { 493test_version_info() {
396 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 494 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
397 return 0 495 return 0
398 else 496 else
399 return 1 497 return 1
400 fi 498 fi
401} 499}
402 500
501# @FUNCTION: strip-unsupported-flags
502# @DESCRIPTION:
503# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
403strip-unsupported-flags() { 504strip-unsupported-flags() {
404 export CFLAGS=$(test-flags-CC ${CFLAGS}) 505 export CFLAGS=$(test-flags-CC ${CFLAGS})
405 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) 506 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
507 export FFLAGS=$(test-flags-F77 ${FFLAGS})
508 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
406} 509}
407 510
511# @FUNCTION: get-flag
512# @USAGE: <flag>
513# @DESCRIPTION:
514# Find and echo the value for a particular flag. Accepts shell globs.
408get-flag() { 515get-flag() {
409 local f findflag="$1" 516 local f findflag="$1"
410 517
411 # this code looks a little flaky but seems to work for 518 # this code looks a little flaky but seems to work for
412 # everything we want ... 519 # everything we want ...
413 # for example, if CFLAGS="-march=i686": 520 # for example, if CFLAGS="-march=i686":
414 # `get-flag -march` == "-march=i686" 521 # `get-flag -march` == "-march=i686"
415 # `get-flag march` == "i686" 522 # `get-flag march` == "i686"
416 for f in ${CFLAGS} ${CXXFLAGS} ; do 523 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
417 if [ "${f/${findflag}}" != "${f}" ] ; then 524 if [ "${f/${findflag}}" != "${f}" ] ; then
418 printf "%s\n" "${f/-${findflag}=}" 525 printf "%s\n" "${f/-${findflag}=}"
419 return 0 526 return 0
420 fi 527 fi
421 done 528 done
422 return 1 529 return 1
423} 530}
424 531
532# @FUNCTION: has_hardened
533# @DESCRIPTION:
425# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 534# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
426has_hardened() { 535has_hardened() {
427 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 536 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
428 537
429 test_version_info Hardened && return 0 538 test_version_info Hardened && return 0
430 # The specs file wont exist unless gcc has GCC_SPECS support 539 # The specs file wont exist unless gcc has GCC_SPECS support
431 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 540 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
432} 541}
433 542
543# @FUNCTION: has_pic
544# @DESCRIPTION:
434# DEPRECATED - use gcc-specs-pie from toolchain-funcs 545# DEPRECATED - use gcc-specs-pie from toolchain-funcs
435# indicate whether PIC is set 546# indicate whether PIC is set
436has_pic() { 547has_pic() {
437 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 548 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
438 549
439 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 550 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
440 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \ 551 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
441 gcc-specs-pie 552 gcc-specs-pie
442} 553}
443 554
555# @FUNCTION: has_pie
556# @DESCRIPTION:
444# DEPRECATED - use gcc-specs-pie from toolchain-funcs 557# DEPRECATED - use gcc-specs-pie from toolchain-funcs
445# indicate whether PIE is set 558# indicate whether PIE is set
446has_pie() { 559has_pie() {
447 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 560 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
448 561
449 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 562 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
450 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \ 563 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
451 gcc-specs-pie 564 gcc-specs-pie
452} 565}
453 566
567# @FUNCTION: has_ssp_all
568# @DESCRIPTION:
454# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 569# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
455# indicate whether code for SSP is being generated for all functions 570# indicate whether code for SSP is being generated for all functions
456has_ssp_all() { 571has_ssp_all() {
457 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 572 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
458 573
459 # note; this matches only -fstack-protector-all 574 # note; this matches only -fstack-protector-all
460 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 575 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
461 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 576 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
462 gcc-specs-ssp-all 577 gcc-specs-ssp-to-all
463} 578}
464 579
580# @FUNCTION: has_ssp
581# @DESCRIPTION:
465# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 582# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
466# indicate whether code for SSP is being generated 583# indicate whether code for SSP is being generated
467has_ssp() { 584has_ssp() {
468 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 585 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
469 586
471 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 588 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
472 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 589 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
473 gcc-specs-ssp 590 gcc-specs-ssp
474} 591}
475 592
593# @FUNCTION: has_m64
594# @DESCRIPTION:
595# This doesn't test if the flag is accepted, it tests if the flag actually
596# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
597# return code is 0, else the return code is 1.
476has_m64() { 598has_m64() {
477 # this doesnt test if the flag is accepted, it tests if the flag 599 # this doesnt test if the flag is accepted, it tests if the flag
478 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 600 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
479 # please dont replace this function with test_flag in some future 601 # please dont replace this function with test_flag in some future
480 # clean-up! 602 # clean-up!
487 rm -f "${temp}".c 609 rm -f "${temp}".c
488 [[ ${ret} != 1 ]] && return 0 610 [[ ${ret} != 1 ]] && return 0
489 return 1 611 return 1
490} 612}
491 613
614# @FUNCTION: has_m32
615# @DESCRIPTION:
616# This doesn't test if the flag is accepted, it tests if the flag actually
617# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
618# code is 0, else return code is 1.
492has_m32() { 619has_m32() {
493 # this doesnt test if the flag is accepted, it tests if the flag 620 # this doesnt test if the flag is accepted, it tests if the flag
494 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 621 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
495 # please dont replace this function with test_flag in some future 622 # please dont replace this function with test_flag in some future
496 # clean-up! 623 # clean-up!
505 rm -f "${temp}".c 632 rm -f "${temp}".c
506 [[ ${ret} != 1 ]] && return 0 633 [[ ${ret} != 1 ]] && return 0
507 return 1 634 return 1
508} 635}
509 636
637# @FUNCTION: replace-sparc64-flags
638# @DESCRIPTION:
639# Sets mcpu to v8 and uses the original value as mtune if none specified.
510replace-sparc64-flags() { 640replace-sparc64-flags() {
511 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 641 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
512 642
513 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 643 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
514 for x in ${SPARC64_CPUS}; do 644 for x in ${SPARC64_CPUS}; do
531 fi 661 fi
532 662
533 export CFLAGS CXXFLAGS 663 export CFLAGS CXXFLAGS
534} 664}
535 665
666# @FUNCTION: append-ldflags
667# @USAGE: <flags>
668# @DESCRIPTION:
669# Add extra <flags> to the current LDFLAGS.
536append-ldflags() { 670append-ldflags() {
537 [[ -z $* ]] && return 0 671 [[ -z $* ]] && return 0
672 local flag
673 for flag in "$@"; do
674 [[ ${flag} == -l* ]] && \
675 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
676 done
677
538 export LDFLAGS="${LDFLAGS} $*" 678 export LDFLAGS="${LDFLAGS} $*"
539 return 0 679 return 0
540} 680}
541 681
542# Remove flags from LDFLAGS - it's up to the ebuild to filter 682# @FUNCTION: filter-ldflags
543# CFLAGS and CXXFLAGS via filter-flags if they need to. 683# @USAGE: <flags>
684# @DESCRIPTION:
685# Remove particular <flags> from LDFLAGS. Accepts shell globs.
544filter-ldflags() { 686filter-ldflags() {
545 _filter-var LDFLAGS "$@" 687 _filter-var LDFLAGS "$@"
546 return 0 688 return 0
547} 689}
548 690
691# @FUNCTION: raw-ldflags
692# @USAGE: <flags>
693# @DESCRIPTION:
549# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 694# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
550# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 695# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
551# to gcc where it needs the '-Wl,'. 696# to gcc where it needs the '-Wl,'.
552raw-ldflags() { 697raw-ldflags() {
553 local x input="$@" 698 local x input="$@"
558 set -- "$@" ${x//,/ } 703 set -- "$@" ${x//,/ }
559 done 704 done
560 echo "$@" 705 echo "$@"
561} 706}
562 707
708# @FUNCTION: bindnow-flags
709# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
710# @DESCRIPTION:
563# Gets the flags needed for "NOW" binding 711# DEPRECATED - Gets the flags needed for "NOW" binding
564bindnow-flags() { 712bindnow-flags() {
565 case $($(tc-getLD) -v 2>&1 </dev/null) in 713 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild"
566 *GNU* | *'with BFD'*) # GNU ld
567 echo "-Wl,-z,now" ;;
568 *Apple*) # Darwin ld
569 echo "-bind_at_load" ;;
570 *)
571 # Some linkers just recognize -V instead of -v
572 case $($(tc-getLD) -V 2>&1 </dev/null) in
573 *Solaris*) # Solaris accept almost the same GNU options
574 echo "-Wl,-z,now" ;;
575 esac
576 ;;
577 esac
578} 714}
579 715
580 716
581# Some tests for when we screw with things and want to make 717# Some tests for when we screw with things and want to make
582# sure we didn't break anything 718# sure we didn't break anything

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