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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 1.139 2009/06/09 22:15:43 dirtyepic Exp $
4# 4
5# @ECLASS: flag-o-matic.eclass
6# @MAINTAINER:
5# Maintainer: toolchain@gentoo.org 7# toolchain@gentoo.org
8# @BLURB: common functions to manipulate and query toolchain flags
9# @DESCRIPTION:
10# This eclass contains a suite of functions to help developers sanely
11# and safely manage toolchain flags in their builds.
6 12
7# need access to emktemp()
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 -fno-omit-frame-pointer"
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-ssse3 -mno-sse4 -mno-sse4.1 \
47 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
48 -mno-popcnt -mno-abm \
111 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
112 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
113 -mieee -mieee-with-inexact -mschedule \ 51 -mieee -mieee-with-inexact -mschedule \
114 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
115 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
116 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 54 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
117 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
118 -msecure-plt -D*" 56 -msecure-plt -m*-toc -D* -U*"
119 57
120 # C[XX]FLAGS that we are think is ok, but needs testing 58 # {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 59 # NOTE: currently -Os have issues with gcc3 and K6* arch's
122 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 60 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
123 return 0 61 return 0
124} 62}
125 63
135 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 73 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
136 gcc-specs-pie || continue 74 gcc-specs-pie || continue
137 is-flagq -nopie || append-flags -nopie;; 75 is-flagq -nopie || append-flags -nopie;;
138 -fstack-protector) 76 -fstack-protector)
139 gcc-specs-ssp || continue 77 gcc-specs-ssp || continue
140 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 78 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
141 -fstack-protector-all) 79 -fstack-protector-all)
142 gcc-specs-ssp-to-all || continue 80 gcc-specs-ssp-to-all || continue
143 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 81 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
82 -fno-strict-overflow)
83 gcc-specs-nostrict || continue
84 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
144 esac 85 esac
145 done 86 done
146} 87}
147 88
148# Remove occurrences of strings from variable given in $1 89# Remove occurrences of strings from variable given in $1
163 eval new\[\${\#new\[@]}]=\${f} 104 eval new\[\${\#new\[@]}]=\${f}
164 done 105 done
165 eval export ${VAR}=\${new\[*]} 106 eval export ${VAR}=\${new\[*]}
166} 107}
167 108
109# @FUNCTION: filter-flags
110# @USAGE: <flags>
111# @DESCRIPTION:
112# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
168filter-flags() { 113filter-flags() {
169 _filter-hardened "$@" 114 _filter-hardened "$@"
170 _filter-var CFLAGS "$@" 115 _filter-var CFLAGS "$@"
171 _filter-var CPPFLAGS "$@" 116 _filter-var CPPFLAGS "$@"
172 _filter-var CXXFLAGS "$@" 117 _filter-var CXXFLAGS "$@"
118 _filter-var FFLAGS "$@"
119 _filter-var FCFLAGS "$@"
173 return 0 120 return 0
174} 121}
175 122
123# @FUNCTION: filter-lfs-flags
124# @DESCRIPTION:
125# Remove flags that enable Large File Support.
176filter-lfs-flags() { 126filter-lfs-flags() {
177 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 127 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
178 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 128 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
179} 129}
180 130
131# @FUNCTION: append-cppflags
132# @USAGE: <flags>
133# @DESCRIPTION:
134# Add extra <flags> to the current CPPFLAGS.
181append-cppflags() { 135append-cppflags() {
182 [[ -z $* ]] && return 0 136 [[ -z $* ]] && return 0
183 export CPPFLAGS="${CPPFLAGS} $*" 137 export CPPFLAGS="${CPPFLAGS} $*"
184 return 0 138 return 0
185} 139}
186 140
141# @FUNCTION: append-cflags
142# @USAGE: <flags>
143# @DESCRIPTION:
144# Add extra <flags> to the current CFLAGS.
145append-cflags() {
146 [[ -z $* ]] && return 0
147 export CFLAGS="${CFLAGS} $*"
148 return 0
149}
150
151# @FUNCTION: append-cxxflags
152# @USAGE: <flags>
153# @DESCRIPTION:
154# Add extra <flags> to the current CXXFLAGS.
155append-cxxflags() {
156 [[ -z $* ]] && return 0
157 export CXXFLAGS="${CXXFLAGS} $*"
158 return 0
159}
160
161# @FUNCTION: append-fflags
162# @USAGE: <flags>
163# @DESCRIPTION:
164# Add extra <flags> to the current {F,FC}FLAGS.
165append-fflags() {
166 [[ -z $* ]] && return 0
167 export FFLAGS="${FFLAGS} $*"
168 export FCFLAGS="${FCFLAGS} $*"
169 return 0
170}
171
172# @FUNCTION: append-lfs-flags
173# @DESCRIPTION:
174# Add flags that enable Large File Support.
187append-lfs-flags() { 175append-lfs-flags() {
188 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 176 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
189 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 177 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
190} 178}
191 179
180# @FUNCTION: append-flags
181# @USAGE: <flags>
182# @DESCRIPTION:
183# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
192append-flags() { 184append-flags() {
193 [[ -z $* ]] && return 0 185 [[ -z $* ]] && return 0
194 export CFLAGS="${CFLAGS} $*" 186 append-cflags "$@"
195 export CXXFLAGS="${CXXFLAGS} $*" 187 append-cxxflags "$@"
188 append-fflags "$@"
196 return 0 189 return 0
197} 190}
198 191
192# @FUNCTION: replace-flags
193# @USAGE: <old> <new>
194# @DESCRIPTION:
195# Replace the <old> flag with <new>. Accepts shell globs for <old>.
199replace-flags() { 196replace-flags() {
200 [[ $# != 2 ]] \ 197 [[ $# != 2 ]] \
201 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 198 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
202 && die "replace-flags takes 2 arguments, not $#" 199 && die "replace-flags takes 2 arguments, not $#"
203 200
204 local f fset 201 local f fset
205 declare -a new_CFLAGS new_CXXFLAGS 202 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
206 203
207 for fset in CFLAGS CXXFLAGS; do 204 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
208 # Looping over the flags instead of using a global 205 # Looping over the flags instead of using a global
209 # substitution ensures that we're working with flag atoms. 206 # substitution ensures that we're working with flag atoms.
210 # Otherwise globs like -O* have the potential to wipe out the 207 # Otherwise globs like -O* have the potential to wipe out the
211 # list of flags. 208 # list of flags.
212 for f in ${!fset}; do 209 for f in ${!fset}; do
218 done 215 done
219 216
220 return 0 217 return 0
221} 218}
222 219
220# @FUNCTION: replace-cpu-flags
221# @USAGE: <old> <new>
222# @DESCRIPTION:
223# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
224# with flags that select the <new> cpu. Accepts shell globs for <old>.
223replace-cpu-flags() { 225replace-cpu-flags() {
224 local newcpu="$#" ; newcpu="${!newcpu}" 226 local newcpu="$#" ; newcpu="${!newcpu}"
225 while [ $# -gt 1 ] ; do 227 while [ $# -gt 1 ] ; do
226 # quote to make sure that no globbing is done (particularly on 228 # quote to make sure that no globbing is done (particularly on
227 # ${oldcpu}) prior to calling replace-flags 229 # ${oldcpu}) prior to calling replace-flags
239 [[ ${x} == $2 ]] && return 0 241 [[ ${x} == $2 ]] && return 0
240 done 242 done
241 return 1 243 return 1
242} 244}
243 245
246# @FUNCTION: is-flagq
247# @USAGE: <flag>
248# @DESCRIPTION:
249# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
244is-flagq() { 250is-flagq() {
245 [[ -n $2 ]] && die "Usage: is-flag <flag>" 251 [[ -n $2 ]] && die "Usage: is-flag <flag>"
246 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 252 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
247} 253}
248 254
255# @FUNCTION: is-flag
256# @USAGE: <flag>
257# @DESCRIPTION:
258# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
249is-flag() { 259is-flag() {
250 is-flagq "$@" && echo true 260 is-flagq "$@" && echo true
251} 261}
252 262
263# @FUNCTION: is-ldflagq
264# @USAGE: <flag>
265# @DESCRIPTION:
266# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
253is-ldflagq() { 267is-ldflagq() {
254 [[ -n $2 ]] && die "Usage: is-ldflag <flag>" 268 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
255 _is_flagq LDFLAGS $1 269 _is_flagq LDFLAGS $1
256} 270}
257 271
272# @FUNCTION: is-ldflag
273# @USAGE: <flag>
274# @DESCRIPTION:
275# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
258is-ldflag() { 276is-ldflag() {
259 is-ldflagq "$@" && echo true 277 is-ldflagq "$@" && echo true
260} 278}
261 279
280# @FUNCTION: filter-mfpmath
281# @USAGE: <math types>
282# @DESCRIPTION:
283# Remove specified math types from the fpmath flag. For example, if the user
284# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
285# -mfpmath=386.
262filter-mfpmath() { 286filter-mfpmath() {
263 local orig_mfpmath new_math prune_math 287 local orig_mfpmath new_math prune_math
264 288
265 # save the original -mfpmath flag 289 # save the original -mfpmath flag
266 orig_mfpmath=$(get-flag -mfpmath) 290 orig_mfpmath=$(get-flag -mfpmath)
285 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 309 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
286 fi 310 fi
287 return 0 311 return 0
288} 312}
289 313
314# @FUNCTION: strip-flags
315# @DESCRIPTION:
316# Strip C[XX]FLAGS of everything except known good/safe flags.
290strip-flags() { 317strip-flags() {
291 local x y flag NEW_CFLAGS NEW_CXXFLAGS 318 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
292 319
293 setup-allowed-flags 320 setup-allowed-flags
294 321
295 local NEW_CFLAGS="" 322 local NEW_CFLAGS=""
296 local NEW_CXXFLAGS="" 323 local NEW_CXXFLAGS=""
324 local NEW_FFLAGS=""
325 local NEW_FCFLAGS=""
297 326
298 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 327 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
299 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 328 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
300 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 329 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
301 fi 330 fi
320 break 349 break
321 fi 350 fi
322 done 351 done
323 done 352 done
324 353
354 for x in ${FFLAGS}; do
355 for y in ${ALLOWED_FLAGS}; do
356 flag=${x%%=*}
357 if [ "${flag%%${y}}" = "" ] ; then
358 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
359 break
360 fi
361 done
362 done
363
364 for x in ${FCFLAGS}; do
365 for y in ${ALLOWED_FLAGS}; do
366 flag=${x%%=*}
367 if [ "${flag%%${y}}" = "" ] ; then
368 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
369 break
370 fi
371 done
372 done
373
325 # In case we filtered out all optimization flags fallback to -O2 374 # In case we filtered out all optimization flags fallback to -O2
326 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 375 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
327 NEW_CFLAGS="${NEW_CFLAGS} -O2" 376 NEW_CFLAGS="${NEW_CFLAGS} -O2"
328 fi 377 fi
329 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 378 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
330 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 379 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
331 fi 380 fi
381 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
382 NEW_FFLAGS="${NEW_FFLAGS} -O2"
383 fi
384 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
385 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
386 fi
332 387
333 set +f # re-enable pathname expansion 388 set +f # re-enable pathname expansion
334 389
335 export CFLAGS="${NEW_CFLAGS}" 390 export CFLAGS="${NEW_CFLAGS}"
336 export CXXFLAGS="${NEW_CXXFLAGS}" 391 export CXXFLAGS="${NEW_CXXFLAGS}"
392 export FFLAGS="${NEW_FFLAGS}"
393 export FCFLAGS="${NEW_FCFLAGS}"
337 return 0 394 return 0
338} 395}
339 396
340test-flag-PROG() { 397test-flag-PROG() {
341 local comp=$1 398 local comp=$1
347 local PROG=$(tc-get${comp}) 404 local PROG=$(tc-get${comp})
348 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 405 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
349 > /dev/null 2>&1 406 > /dev/null 2>&1
350} 407}
351 408
352# Returns true if C compiler support given flag 409# @FUNCTION: test-flag-CC
410# @USAGE: <flag>
411# @DESCRIPTION:
412# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
353test-flag-CC() { test-flag-PROG "CC" "$1"; } 413test-flag-CC() { test-flag-PROG "CC" "$1"; }
354 414
355# Returns true if C++ compiler support given flag 415# @FUNCTION: test-flag-CXX
416# @USAGE: <flag>
417# @DESCRIPTION:
418# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
356test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 419test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
420
421# @FUNCTION: test-flag-F77
422# @USAGE: <flag>
423# @DESCRIPTION:
424# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
425test-flag-F77() { test-flag-PROG "F77" "$1"; }
426
427# @FUNCTION: test-flag-FC
428# @USAGE: <flag>
429# @DESCRIPTION:
430# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
431test-flag-FC() { test-flag-PROG "FC" "$1"; }
357 432
358test-flags-PROG() { 433test-flags-PROG() {
359 local comp=$1 434 local comp=$1
360 local flags 435 local flags
361 local x 436 local x
373 448
374 # Just bail if we dont have any flags 449 # Just bail if we dont have any flags
375 [[ -n ${flags} ]] 450 [[ -n ${flags} ]]
376} 451}
377 452
378# Returns (echo's) the given flags supported by the C compiler 453# @FUNCTION: test-flags-CC
454# @USAGE: <flags>
455# @DESCRIPTION:
456# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
379test-flags-CC() { test-flags-PROG "CC" "$@"; } 457test-flags-CC() { test-flags-PROG "CC" "$@"; }
380 458
381# Returns (echo's) the given flags supported by the C++ compiler 459# @FUNCTION: test-flags-CXX
460# @USAGE: <flags>
461# @DESCRIPTION:
462# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
382test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 463test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
383 464
465# @FUNCTION: test-flags-F77
466# @USAGE: <flags>
467# @DESCRIPTION:
468# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
469test-flags-F77() { test-flags-PROG "F77" "$@"; }
470
471# @FUNCTION: test-flags-FC
472# @USAGE: <flags>
473# @DESCRIPTION:
474# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
475test-flags-FC() { test-flags-PROG "FC" "$@"; }
476
477# @FUNCTION: test-flags
478# @USAGE: <flags>
479# @DESCRIPTION:
384# Short-hand that should hopefully work for both C and C++ compiler, but 480# Short-hand that should hopefully work for both C and C++ compiler, but
385# its really only present due to the append-flags() abomination. 481# its really only present due to the append-flags() abomination.
386test-flags() { test-flags-CC "$@"; } 482test-flags() { test-flags-CC "$@"; }
387 483
388# Depriciated, use test-flags() 484# @FUNCTION: test_flag
485# @DESCRIPTION:
486# DEPRICIATED, use test-flags()
389test_flag() { 487test_flag() {
390 ewarn "test_flag: deprecated, please use test-flags()!" >&2 488 ewarn "test_flag: deprecated, please use test-flags()!" >&2
391 489
392 test-flags-CC "$@" 490 test-flags-CC "$@"
393} 491}
394 492
493# @FUNCTION: test_version_info
494# @USAGE: <version>
495# @DESCRIPTION:
496# Returns shell true if the current C compiler version matches <version>, else returns shell false.
497# Accepts shell globs.
395test_version_info() { 498test_version_info() {
396 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 499 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
397 return 0 500 return 0
398 else 501 else
399 return 1 502 return 1
400 fi 503 fi
401} 504}
402 505
506# @FUNCTION: strip-unsupported-flags
507# @DESCRIPTION:
508# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
403strip-unsupported-flags() { 509strip-unsupported-flags() {
404 export CFLAGS=$(test-flags-CC ${CFLAGS}) 510 export CFLAGS=$(test-flags-CC ${CFLAGS})
405 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) 511 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
512 export FFLAGS=$(test-flags-F77 ${FFLAGS})
513 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
406} 514}
407 515
516# @FUNCTION: get-flag
517# @USAGE: <flag>
518# @DESCRIPTION:
519# Find and echo the value for a particular flag. Accepts shell globs.
408get-flag() { 520get-flag() {
409 local f findflag="$1" 521 local f findflag="$1"
410 522
411 # this code looks a little flaky but seems to work for 523 # this code looks a little flaky but seems to work for
412 # everything we want ... 524 # everything we want ...
413 # for example, if CFLAGS="-march=i686": 525 # for example, if CFLAGS="-march=i686":
414 # `get-flag -march` == "-march=i686" 526 # `get-flag -march` == "-march=i686"
415 # `get-flag march` == "i686" 527 # `get-flag march` == "i686"
416 for f in ${CFLAGS} ${CXXFLAGS} ; do 528 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
417 if [ "${f/${findflag}}" != "${f}" ] ; then 529 if [ "${f/${findflag}}" != "${f}" ] ; then
418 printf "%s\n" "${f/-${findflag}=}" 530 printf "%s\n" "${f/-${findflag}=}"
419 return 0 531 return 0
420 fi 532 fi
421 done 533 done
422 return 1 534 return 1
423} 535}
424 536
537# @FUNCTION: has_hardened
538# @DESCRIPTION:
425# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 539# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
426has_hardened() { 540has_hardened() {
427 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 541 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
428 542
429 test_version_info Hardened && return 0 543 test_version_info Hardened && return 0
430 # The specs file wont exist unless gcc has GCC_SPECS support 544 # The specs file wont exist unless gcc has GCC_SPECS support
431 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 545 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
432} 546}
433 547
548# @FUNCTION: has_pic
549# @DESCRIPTION:
434# DEPRECATED - use gcc-specs-pie from toolchain-funcs 550# DEPRECATED - use gcc-specs-pie from toolchain-funcs
435# indicate whether PIC is set 551# indicate whether PIC is set
436has_pic() { 552has_pic() {
437 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 553 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
438 554
439 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 555 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
440 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \ 556 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
441 gcc-specs-pie 557 gcc-specs-pie
442} 558}
443 559
560# @FUNCTION: has_pie
561# @DESCRIPTION:
444# DEPRECATED - use gcc-specs-pie from toolchain-funcs 562# DEPRECATED - use gcc-specs-pie from toolchain-funcs
445# indicate whether PIE is set 563# indicate whether PIE is set
446has_pie() { 564has_pie() {
447 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 565 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
448 566
449 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 567 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
450 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \ 568 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
451 gcc-specs-pie 569 gcc-specs-pie
452} 570}
453 571
572# @FUNCTION: has_ssp_all
573# @DESCRIPTION:
454# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 574# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
455# indicate whether code for SSP is being generated for all functions 575# indicate whether code for SSP is being generated for all functions
456has_ssp_all() { 576has_ssp_all() {
457 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 577 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
458 578
459 # note; this matches only -fstack-protector-all 579 # note; this matches only -fstack-protector-all
460 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 580 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
461 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 581 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
462 gcc-specs-ssp-all 582 gcc-specs-ssp-to-all
463} 583}
464 584
585# @FUNCTION: has_ssp
586# @DESCRIPTION:
465# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 587# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
466# indicate whether code for SSP is being generated 588# indicate whether code for SSP is being generated
467has_ssp() { 589has_ssp() {
468 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 590 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
469 591
471 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 593 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
472 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 594 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
473 gcc-specs-ssp 595 gcc-specs-ssp
474} 596}
475 597
598# @FUNCTION: has_m64
599# @DESCRIPTION:
600# This doesn't test if the flag is accepted, it tests if the flag actually
601# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
602# return code is 0, else the return code is 1.
476has_m64() { 603has_m64() {
477 # this doesnt test if the flag is accepted, it tests if the flag 604 # this doesnt test if the flag is accepted, it tests if the flag
478 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 605 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
479 # please dont replace this function with test_flag in some future 606 # please dont replace this function with test_flag in some future
480 # clean-up! 607 # clean-up!
487 rm -f "${temp}".c 614 rm -f "${temp}".c
488 [[ ${ret} != 1 ]] && return 0 615 [[ ${ret} != 1 ]] && return 0
489 return 1 616 return 1
490} 617}
491 618
619# @FUNCTION: has_m32
620# @DESCRIPTION:
621# This doesn't test if the flag is accepted, it tests if the flag actually
622# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
623# code is 0, else return code is 1.
492has_m32() { 624has_m32() {
493 # this doesnt test if the flag is accepted, it tests if the flag 625 # this doesnt test if the flag is accepted, it tests if the flag
494 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 626 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
495 # please dont replace this function with test_flag in some future 627 # please dont replace this function with test_flag in some future
496 # clean-up! 628 # clean-up!
505 rm -f "${temp}".c 637 rm -f "${temp}".c
506 [[ ${ret} != 1 ]] && return 0 638 [[ ${ret} != 1 ]] && return 0
507 return 1 639 return 1
508} 640}
509 641
642# @FUNCTION: replace-sparc64-flags
643# @DESCRIPTION:
644# Sets mcpu to v8 and uses the original value as mtune if none specified.
510replace-sparc64-flags() { 645replace-sparc64-flags() {
511 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 646 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
512 647
513 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 648 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
514 for x in ${SPARC64_CPUS}; do 649 for x in ${SPARC64_CPUS}; do
531 fi 666 fi
532 667
533 export CFLAGS CXXFLAGS 668 export CFLAGS CXXFLAGS
534} 669}
535 670
671# @FUNCTION: append-ldflags
672# @USAGE: <flags>
673# @DESCRIPTION:
674# Add extra <flags> to the current LDFLAGS.
536append-ldflags() { 675append-ldflags() {
537 [[ -z $* ]] && return 0 676 [[ -z $* ]] && return 0
677 local flag
678 for flag in "$@"; do
679 [[ ${flag} == -l* ]] && \
680 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
681 done
682
538 export LDFLAGS="${LDFLAGS} $*" 683 export LDFLAGS="${LDFLAGS} $*"
539 return 0 684 return 0
540} 685}
541 686
542# Remove flags from LDFLAGS - it's up to the ebuild to filter 687# @FUNCTION: filter-ldflags
543# CFLAGS and CXXFLAGS via filter-flags if they need to. 688# @USAGE: <flags>
689# @DESCRIPTION:
690# Remove particular <flags> from LDFLAGS. Accepts shell globs.
544filter-ldflags() { 691filter-ldflags() {
545 _filter-var LDFLAGS "$@" 692 _filter-var LDFLAGS "$@"
546 return 0 693 return 0
547} 694}
548 695
696# @FUNCTION: raw-ldflags
697# @USAGE: <flags>
698# @DESCRIPTION:
549# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 699# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
550# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 700# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
551# to gcc where it needs the '-Wl,'. 701# to gcc where it needs the '-Wl,'.
552raw-ldflags() { 702raw-ldflags() {
553 local x input="$@" 703 local x input="$@"
558 set -- "$@" ${x//,/ } 708 set -- "$@" ${x//,/ }
559 done 709 done
560 echo "$@" 710 echo "$@"
561} 711}
562 712
713# @FUNCTION: bindnow-flags
714# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
715# @DESCRIPTION:
563# Gets the flags needed for "NOW" binding 716# DEPRECATED - Gets the flags needed for "NOW" binding
564bindnow-flags() { 717bindnow-flags() {
565 case $($(tc-getLD) -v 2>&1 </dev/null) in 718 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} 719}
579 720
580 721
581# Some tests for when we screw with things and want to make 722# Some tests for when we screw with things and want to make
582# sure we didn't break anything 723# sure we didn't break anything

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