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1# Copyright 1999-2007 Gentoo Foundation 1# Copyright 1999-2011 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.119 2007/05/12 11:45:51 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.160 2011/12/10 20:03:17 vapier Exp $
4# 4
5# @ECLASS: flag-o-matic.eclass
6# @MAINTAINER:
5# Maintainer: toolchain@gentoo.org 7# toolchain@gentoo.org
8# @BLURB: common functions to manipulate and query toolchain flags
9# @DESCRIPTION:
10# This eclass contains a suite of functions to help developers sanely
11# and safely manage toolchain flags in their builds.
6 12
7# need access to emktemp() 13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15
8inherit eutils toolchain-funcs multilib 16inherit eutils toolchain-funcs multilib
9 17
10#
11#### filter-flags <flags> ####
12# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags
14#
15#### append-flags <flags> ####
16# Add extra flags to your current C[XX]FLAGS
17#
18#### replace-flags <orig.flag> <new.flag> ###
19# Replace a flag by another one
20#
21#### replace-cpu-flags <old.cpus> <new.cpu> ###
22# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu>
24#
25#### is-flag[q] <flag> ####
26# Returns "true" if flag is set in C[XX]FLAGS
27# Matches only complete a flag
28# q version sets return code but doesn't echo
29#
30#### is-ldflag[q] <flag> ####
31# Returns "true" if flag is set in LDFLAGS
32# Matches only complete a flag
33# q version sets return code but doesn't echo
34#
35#### strip-flags ####
36# Strip C[XX]FLAGS of everything except known
37# good options.
38#
39#### strip-unsupported-flags ####
40# Strip C[XX]FLAGS of any flags not supported by
41# installed version of gcc
42#
43#### get-flag <flag> ####
44# Find and echo the value for a particular flag
45#
46#### replace-sparc64-flags ####
47# Sets mcpu to v8 and uses the original value
48# as mtune if none specified.
49#
50#### filter-mfpmath <math types> ####
51# Remove specified math types from the fpmath specification
52# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
53# will leave the user with -mfpmath=386
54#
55#### append-ldflags ####
56# Add extra flags to your current LDFLAGS
57#
58#### filter-ldflags <flags> ####
59# Remove particular flags from LDFLAGS
60# Matches only complete flags
61#
62#### bindnow-flags ####
63# Returns the flags to enable "now" binding in the current selected linker.
64#
65################ DEPRECATED functions ################ 18################ DEPRECATED functions ################
66# The following are still present to avoid breaking existing 19# The following are still present to avoid breaking existing
67# code more than necessary; however they are deprecated. Please 20# code more than necessary; however they are deprecated. Please
68# use gcc-specs-* from toolchain-funcs.eclass instead, if you 21# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# need to know which hardened techs are active in the compiler. 22# need to know which hardened techs are active in the compiler.
70# See bug #100974 23# See bug #100974
71# 24#
72#### has_hardened #### 25# has_hardened
73# Returns true if the compiler has 'Hardened' in its version string, 26# has_pie
74# (note; switched-spec vanilla compilers satisfy this condition) or 27# has_pic
75# the specs file name contains 'hardened'.
76#
77#### has_pie ####
78# Returns true if the compiler by default or with current CFLAGS
79# builds position-independent code.
80#
81#### has_pic ####
82# Returns true if the compiler by default or with current CFLAGS
83# builds position-independent code.
84#
85#### has_ssp_all #### 28# has_ssp_all
86# Returns true if the compiler by default or with current CFLAGS 29# has_ssp
87# generates stack smash protections for all functions
88#
89#### has_ssp ####
90# Returns true if the compiler by default or with current CFLAGS
91# generates stack smash protections for most vulnerable functions
92#
93 30
31
94# C[XX]FLAGS that we allow in strip-flags 32# {C,CXX,F,FC}FLAGS that we allow in strip-flags
95# Note: shell globs and character lists are allowed 33# Note: shell globs and character lists are allowed
96setup-allowed-flags() { 34setup-allowed-flags() {
97 if [[ -z ${ALLOWED_FLAGS} ]] ; then 35 if [[ -z ${ALLOWED_FLAGS} ]] ; then
98 export ALLOWED_FLAGS="-pipe" 36 export ALLOWED_FLAGS="-pipe"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking" 39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+" 41 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
104 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 42 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive"
43 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
105 fi 44 fi
106 # allow a bunch of flags that negate features / control ABI 45 # allow a bunch of flags that negate features / control ABI
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \ 46 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
108 -fno-strict-aliasing -fno-bounds-checking" 47 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
109 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 48 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
110 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 49 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
50 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
51 -mno-popcnt -mno-abm \
111 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 52 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
112 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 53 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
113 -mieee -mieee-with-inexact -mschedule \ 54 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
114 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 55 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
115 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 56 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
116 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 57 -m32 -m64 -mx32 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
117 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 58 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
118 -msecure-plt -D*" 59 -msecure-plt -m*-toc -D* -U*"
119 60
61 # 4.5
62 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
63 # 4.6
64 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
65 -mno-bmi -mno-tbm"
66
120 # C[XX]FLAGS that we are think is ok, but needs testing 67 # {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 68 # NOTE: currently -Os have issues with gcc3 and K6* arch's
122 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 69 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
123 return 0 70 return 0
124} 71}
125 72
135 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 82 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
136 gcc-specs-pie || continue 83 gcc-specs-pie || continue
137 is-flagq -nopie || append-flags -nopie;; 84 is-flagq -nopie || append-flags -nopie;;
138 -fstack-protector) 85 -fstack-protector)
139 gcc-specs-ssp || continue 86 gcc-specs-ssp || continue
140 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 87 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
141 -fstack-protector-all) 88 -fstack-protector-all)
142 gcc-specs-ssp-to-all || continue 89 gcc-specs-ssp-to-all || continue
143 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 90 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
91 -fno-strict-overflow)
92 gcc-specs-nostrict || continue
93 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
144 esac 94 esac
145 done 95 done
146} 96}
147 97
148# Remove occurrences of strings from variable given in $1 98# Remove occurrences of strings from variable given in $1
163 eval new\[\${\#new\[@]}]=\${f} 113 eval new\[\${\#new\[@]}]=\${f}
164 done 114 done
165 eval export ${VAR}=\${new\[*]} 115 eval export ${VAR}=\${new\[*]}
166} 116}
167 117
118# @FUNCTION: filter-flags
119# @USAGE: <flags>
120# @DESCRIPTION:
121# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
168filter-flags() { 122filter-flags() {
169 _filter-hardened "$@" 123 _filter-hardened "$@"
170 _filter-var CFLAGS "$@" 124 _filter-var CFLAGS "$@"
171 _filter-var CPPFLAGS "$@" 125 _filter-var CPPFLAGS "$@"
172 _filter-var CXXFLAGS "$@" 126 _filter-var CXXFLAGS "$@"
127 _filter-var FFLAGS "$@"
128 _filter-var FCFLAGS "$@"
173 return 0 129 return 0
174} 130}
175 131
132# @FUNCTION: filter-lfs-flags
133# @DESCRIPTION:
134# Remove flags that enable Large File Support.
176filter-lfs-flags() { 135filter-lfs-flags() {
177 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 136 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
137 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
138 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
139 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
140 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
178 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 141 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
179} 142}
180 143
144# @FUNCTION: append-cppflags
145# @USAGE: <flags>
146# @DESCRIPTION:
147# Add extra <flags> to the current CPPFLAGS.
181append-cppflags() { 148append-cppflags() {
182 [[ -z $* ]] && return 0 149 [[ $# -eq 0 ]] && return 0
183 export CPPFLAGS="${CPPFLAGS} $*" 150 export CPPFLAGS="${CPPFLAGS} $*"
184 return 0 151 return 0
185} 152}
186 153
154# @FUNCTION: append-cflags
155# @USAGE: <flags>
156# @DESCRIPTION:
157# Add extra <flags> to the current CFLAGS.
158append-cflags() {
159 [[ $# -eq 0 ]] && return 0
160 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
161 return 0
162}
163
164# @FUNCTION: append-cxxflags
165# @USAGE: <flags>
166# @DESCRIPTION:
167# Add extra <flags> to the current CXXFLAGS.
168append-cxxflags() {
169 [[ $# -eq 0 ]] && return 0
170 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
171 return 0
172}
173
174# @FUNCTION: append-fflags
175# @USAGE: <flags>
176# @DESCRIPTION:
177# Add extra <flags> to the current {F,FC}FLAGS.
178append-fflags() {
179 [[ $# -eq 0 ]] && return 0
180 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
181 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
182 return 0
183}
184
185# @FUNCTION: append-lfs-flags
186# @DESCRIPTION:
187# Add flags that enable Large File Support.
187append-lfs-flags() { 188append-lfs-flags() {
188 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 189 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
190 # see comments in filter-lfs-flags func for meaning of these
189 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 191 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
190} 192}
191 193
194# @FUNCTION: append-flags
195# @USAGE: <flags>
196# @DESCRIPTION:
197# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
192append-flags() { 198append-flags() {
193 [[ -z $* ]] && return 0 199 [[ $# -eq 0 ]] && return 0
194 export CFLAGS="${CFLAGS} $*" 200 append-cflags "$@"
195 export CXXFLAGS="${CXXFLAGS} $*" 201 append-cxxflags "$@"
202 append-fflags "$@"
196 return 0 203 return 0
197} 204}
198 205
206# @FUNCTION: replace-flags
207# @USAGE: <old> <new>
208# @DESCRIPTION:
209# Replace the <old> flag with <new>. Accepts shell globs for <old>.
199replace-flags() { 210replace-flags() {
200 [[ $# != 2 ]] \ 211 [[ $# != 2 ]] \
201 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 212 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
202 && die "replace-flags takes 2 arguments, not $#" 213 && die "replace-flags takes 2 arguments, not $#"
203 214
204 local f fset 215 local f fset
205 declare -a new_CFLAGS new_CXXFLAGS 216 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
206 217
207 for fset in CFLAGS CXXFLAGS; do 218 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
208 # Looping over the flags instead of using a global 219 # Looping over the flags instead of using a global
209 # substitution ensures that we're working with flag atoms. 220 # substitution ensures that we're working with flag atoms.
210 # Otherwise globs like -O* have the potential to wipe out the 221 # Otherwise globs like -O* have the potential to wipe out the
211 # list of flags. 222 # list of flags.
212 for f in ${!fset}; do 223 for f in ${!fset}; do
218 done 229 done
219 230
220 return 0 231 return 0
221} 232}
222 233
234# @FUNCTION: replace-cpu-flags
235# @USAGE: <old> <new>
236# @DESCRIPTION:
237# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
238# with flags that select the <new> cpu. Accepts shell globs for <old>.
223replace-cpu-flags() { 239replace-cpu-flags() {
224 local newcpu="$#" ; newcpu="${!newcpu}" 240 local newcpu="$#" ; newcpu="${!newcpu}"
225 while [ $# -gt 1 ] ; do 241 while [ $# -gt 1 ] ; do
226 # quote to make sure that no globbing is done (particularly on 242 # quote to make sure that no globbing is done (particularly on
227 # ${oldcpu}) prior to calling replace-flags 243 # ${oldcpu}) prior to calling replace-flags
239 [[ ${x} == $2 ]] && return 0 255 [[ ${x} == $2 ]] && return 0
240 done 256 done
241 return 1 257 return 1
242} 258}
243 259
260# @FUNCTION: is-flagq
261# @USAGE: <flag>
262# @DESCRIPTION:
263# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
244is-flagq() { 264is-flagq() {
245 [[ -n $2 ]] && die "Usage: is-flag <flag>" 265 [[ -n $2 ]] && die "Usage: is-flag <flag>"
246 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 266 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
247} 267}
248 268
269# @FUNCTION: is-flag
270# @USAGE: <flag>
271# @DESCRIPTION:
272# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
249is-flag() { 273is-flag() {
250 is-flagq "$@" && echo true 274 is-flagq "$@" && echo true
251} 275}
252 276
277# @FUNCTION: is-ldflagq
278# @USAGE: <flag>
279# @DESCRIPTION:
280# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
253is-ldflagq() { 281is-ldflagq() {
254 [[ -n $2 ]] && die "Usage: is-ldflag <flag>" 282 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
255 _is_flagq LDFLAGS $1 283 _is_flagq LDFLAGS $1
256} 284}
257 285
286# @FUNCTION: is-ldflag
287# @USAGE: <flag>
288# @DESCRIPTION:
289# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
258is-ldflag() { 290is-ldflag() {
259 is-ldflagq "$@" && echo true 291 is-ldflagq "$@" && echo true
260} 292}
261 293
294# @FUNCTION: filter-mfpmath
295# @USAGE: <math types>
296# @DESCRIPTION:
297# Remove specified math types from the fpmath flag. For example, if the user
298# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
299# -mfpmath=386.
262filter-mfpmath() { 300filter-mfpmath() {
263 local orig_mfpmath new_math prune_math 301 local orig_mfpmath new_math prune_math
264 302
265 # save the original -mfpmath flag 303 # save the original -mfpmath flag
266 orig_mfpmath=$(get-flag -mfpmath) 304 orig_mfpmath=$(get-flag -mfpmath)
285 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 323 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
286 fi 324 fi
287 return 0 325 return 0
288} 326}
289 327
328# @FUNCTION: strip-flags
329# @DESCRIPTION:
330# Strip C[XX]FLAGS of everything except known good/safe flags.
290strip-flags() { 331strip-flags() {
291 local x y flag NEW_CFLAGS NEW_CXXFLAGS 332 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
292 333
293 setup-allowed-flags 334 setup-allowed-flags
294 335
295 local NEW_CFLAGS="" 336 local NEW_CFLAGS=""
296 local NEW_CXXFLAGS="" 337 local NEW_CXXFLAGS=""
338 local NEW_FFLAGS=""
339 local NEW_FCFLAGS=""
297 340
298 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 341 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
299 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 342 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
300 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 343 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
301 fi 344 fi
302 345
303 set -f # disable pathname expansion 346 set -f # disable pathname expansion
304 347
320 break 363 break
321 fi 364 fi
322 done 365 done
323 done 366 done
324 367
368 for x in ${FFLAGS}; do
369 for y in ${ALLOWED_FLAGS}; do
370 flag=${x%%=*}
371 if [ "${flag%%${y}}" = "" ] ; then
372 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
373 break
374 fi
375 done
376 done
377
378 for x in ${FCFLAGS}; do
379 for y in ${ALLOWED_FLAGS}; do
380 flag=${x%%=*}
381 if [ "${flag%%${y}}" = "" ] ; then
382 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
383 break
384 fi
385 done
386 done
387
325 # In case we filtered out all optimization flags fallback to -O2 388 # In case we filtered out all optimization flags fallback to -O2
326 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 389 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
327 NEW_CFLAGS="${NEW_CFLAGS} -O2" 390 NEW_CFLAGS="${NEW_CFLAGS} -O2"
328 fi 391 fi
329 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 392 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
330 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 393 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
331 fi 394 fi
395 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
396 NEW_FFLAGS="${NEW_FFLAGS} -O2"
397 fi
398 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
399 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
400 fi
332 401
333 set +f # re-enable pathname expansion 402 set +f # re-enable pathname expansion
334 403
335 export CFLAGS="${NEW_CFLAGS}" 404 export CFLAGS="${NEW_CFLAGS}"
336 export CXXFLAGS="${NEW_CXXFLAGS}" 405 export CXXFLAGS="${NEW_CXXFLAGS}"
406 export FFLAGS="${NEW_FFLAGS}"
407 export FCFLAGS="${NEW_FCFLAGS}"
337 return 0 408 return 0
338} 409}
339 410
340test-flag-PROG() { 411test-flag-PROG() {
341 local comp=$1 412 local comp=$1
342 local flags="$2" 413 local flags="$2"
343 414
344 [[ -z ${comp} || -z ${flags} ]] && \ 415 [[ -z ${comp} || -z ${flags} ]] && return 1
345 return 1
346 416
417 # use -c so we can test the assembler as well
347 local PROG=$(tc-get${comp}) 418 local PROG=$(tc-get${comp})
348 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 419 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
349 > /dev/null 2>&1 420 > /dev/null 2>&1
350} 421}
351 422
352# Returns true if C compiler support given flag 423# @FUNCTION: test-flag-CC
424# @USAGE: <flag>
425# @DESCRIPTION:
426# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
353test-flag-CC() { test-flag-PROG "CC" "$1"; } 427test-flag-CC() { test-flag-PROG "CC" "$1"; }
354 428
355# Returns true if C++ compiler support given flag 429# @FUNCTION: test-flag-CXX
430# @USAGE: <flag>
431# @DESCRIPTION:
432# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
356test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 433test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
434
435# @FUNCTION: test-flag-F77
436# @USAGE: <flag>
437# @DESCRIPTION:
438# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
439test-flag-F77() { test-flag-PROG "F77" "$1"; }
440
441# @FUNCTION: test-flag-FC
442# @USAGE: <flag>
443# @DESCRIPTION:
444# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
445test-flag-FC() { test-flag-PROG "FC" "$1"; }
357 446
358test-flags-PROG() { 447test-flags-PROG() {
359 local comp=$1 448 local comp=$1
360 local flags 449 local flags
361 local x 450 local x
362 451
363 shift 452 shift
364 453
365 [[ -z ${comp} ]] && return 1 454 [[ -z ${comp} ]] && return 1
366 455
367 x=""
368 for x in "$@" ; do 456 for x in "$@" ; do
369 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 457 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
370 done 458 done
371 459
372 echo "${flags}" 460 echo "${flags}"
373 461
374 # Just bail if we dont have any flags 462 # Just bail if we dont have any flags
375 [[ -n ${flags} ]] 463 [[ -n ${flags} ]]
376} 464}
377 465
378# Returns (echo's) the given flags supported by the C compiler 466# @FUNCTION: test-flags-CC
467# @USAGE: <flags>
468# @DESCRIPTION:
469# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
379test-flags-CC() { test-flags-PROG "CC" "$@"; } 470test-flags-CC() { test-flags-PROG "CC" "$@"; }
380 471
381# Returns (echo's) the given flags supported by the C++ compiler 472# @FUNCTION: test-flags-CXX
473# @USAGE: <flags>
474# @DESCRIPTION:
475# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
382test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 476test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
383 477
478# @FUNCTION: test-flags-F77
479# @USAGE: <flags>
480# @DESCRIPTION:
481# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
482test-flags-F77() { test-flags-PROG "F77" "$@"; }
483
484# @FUNCTION: test-flags-FC
485# @USAGE: <flags>
486# @DESCRIPTION:
487# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
488test-flags-FC() { test-flags-PROG "FC" "$@"; }
489
490# @FUNCTION: test-flags
491# @USAGE: <flags>
492# @DESCRIPTION:
384# Short-hand that should hopefully work for both C and C++ compiler, but 493# Short-hand that should hopefully work for both C and C++ compiler, but
385# its really only present due to the append-flags() abomination. 494# its really only present due to the append-flags() abomination.
386test-flags() { test-flags-CC "$@"; } 495test-flags() { test-flags-CC "$@"; }
387 496
388# Depriciated, use test-flags() 497# @FUNCTION: test_version_info
389test_flag() { 498# @USAGE: <version>
390 ewarn "test_flag: deprecated, please use test-flags()!" >&2 499# @DESCRIPTION:
391 500# Returns shell true if the current C compiler version matches <version>, else returns shell false.
392 test-flags-CC "$@" 501# Accepts shell globs.
393}
394
395test_version_info() { 502test_version_info() {
396 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 503 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
397 return 0 504 return 0
398 else 505 else
399 return 1 506 return 1
400 fi 507 fi
401} 508}
402 509
510# @FUNCTION: strip-unsupported-flags
511# @DESCRIPTION:
512# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
403strip-unsupported-flags() { 513strip-unsupported-flags() {
404 export CFLAGS=$(test-flags-CC ${CFLAGS}) 514 export CFLAGS=$(test-flags-CC ${CFLAGS})
405 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) 515 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
516 export FFLAGS=$(test-flags-F77 ${FFLAGS})
517 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
406} 518}
407 519
520# @FUNCTION: get-flag
521# @USAGE: <flag>
522# @DESCRIPTION:
523# Find and echo the value for a particular flag. Accepts shell globs.
408get-flag() { 524get-flag() {
409 local f findflag="$1" 525 local f findflag="$1"
410 526
411 # this code looks a little flaky but seems to work for 527 # this code looks a little flaky but seems to work for
412 # everything we want ... 528 # everything we want ...
413 # for example, if CFLAGS="-march=i686": 529 # for example, if CFLAGS="-march=i686":
414 # `get-flag -march` == "-march=i686" 530 # `get-flag -march` == "-march=i686"
415 # `get-flag march` == "i686" 531 # `get-flag march` == "i686"
416 for f in ${CFLAGS} ${CXXFLAGS} ; do 532 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
417 if [ "${f/${findflag}}" != "${f}" ] ; then 533 if [ "${f/${findflag}}" != "${f}" ] ; then
418 printf "%s\n" "${f/-${findflag}=}" 534 printf "%s\n" "${f/-${findflag}=}"
419 return 0 535 return 0
420 fi 536 fi
421 done 537 done
422 return 1 538 return 1
423} 539}
424 540
425# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 541# DEAD FUNCS. Remove by Dec 2011.
426has_hardened() { 542test_flag() { die "$0: deprecated, please use test-flags()!" ; }
427 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 543has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
428
429 test_version_info Hardened && return 0
430 # The specs file wont exist unless gcc has GCC_SPECS support
431 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
432}
433
434# DEPRECATED - use gcc-specs-pie from toolchain-funcs
435# indicate whether PIC is set
436has_pic() {
437 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 544has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
438
439 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
440 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
441 gcc-specs-pie
442}
443
444# DEPRECATED - use gcc-specs-pie from toolchain-funcs
445# indicate whether PIE is set
446has_pie() {
447 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 545has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
448
449 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
450 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
451 gcc-specs-pie
452}
453
454# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
455# indicate whether code for SSP is being generated for all functions
456has_ssp_all() {
457 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 546has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
458
459 # note; this matches only -fstack-protector-all
460 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
461 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
462 gcc-specs-ssp-all
463}
464
465# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
466# indicate whether code for SSP is being generated
467has_ssp() {
468 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 547has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
469 548
470 # note; this matches both -fstack-protector and -fstack-protector-all 549# @FUNCTION: has_m64
471 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 550# @DESCRIPTION:
472 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 551# This doesn't test if the flag is accepted, it tests if the flag actually
473 gcc-specs-ssp 552# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
474} 553# return code is 0, else the return code is 1.
475
476has_m64() { 554has_m64() {
477 # this doesnt test if the flag is accepted, it tests if the flag 555 # this doesnt test if the flag is accepted, it tests if the flag
478 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 556 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
479 # please dont replace this function with test_flag in some future 557 # please dont replace this function with test_flag in some future
480 # clean-up! 558 # clean-up!
487 rm -f "${temp}".c 565 rm -f "${temp}".c
488 [[ ${ret} != 1 ]] && return 0 566 [[ ${ret} != 1 ]] && return 0
489 return 1 567 return 1
490} 568}
491 569
570# @FUNCTION: has_m32
571# @DESCRIPTION:
572# This doesn't test if the flag is accepted, it tests if the flag actually
573# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
574# code is 0, else return code is 1.
492has_m32() { 575has_m32() {
493 # this doesnt test if the flag is accepted, it tests if the flag 576 # this doesnt test if the flag is accepted, it tests if the flag
494 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 577 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
495 # please dont replace this function with test_flag in some future 578 # please dont replace this function with test_flag in some future
496 # clean-up! 579 # clean-up!
505 rm -f "${temp}".c 588 rm -f "${temp}".c
506 [[ ${ret} != 1 ]] && return 0 589 [[ ${ret} != 1 ]] && return 0
507 return 1 590 return 1
508} 591}
509 592
593# @FUNCTION: replace-sparc64-flags
594# @DESCRIPTION:
595# Sets mcpu to v8 and uses the original value as mtune if none specified.
510replace-sparc64-flags() { 596replace-sparc64-flags() {
511 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 597 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
512 598
513 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 599 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
514 for x in ${SPARC64_CPUS}; do 600 for x in ${SPARC64_CPUS}; do
531 fi 617 fi
532 618
533 export CFLAGS CXXFLAGS 619 export CFLAGS CXXFLAGS
534} 620}
535 621
622# @FUNCTION: append-libs
623# @USAGE: <libs>
624# @DESCRIPTION:
625# Add extra <libs> to the current LIBS.
626append-libs() {
627 [[ $# -eq 0 ]] && return 0
628 local flag
629 for flag in "$@"; do
630 [[ ${flag} == -l* ]] && flag=${flag#-l}
631 export LIBS="${LIBS} -l${flag}"
632 done
633
634 return 0
635}
636
637# @FUNCTION: append-ldflags
638# @USAGE: <flags>
639# @DESCRIPTION:
640# Add extra <flags> to the current LDFLAGS.
536append-ldflags() { 641append-ldflags() {
537 [[ -z $* ]] && return 0 642 [[ $# -eq 0 ]] && return 0
643 local flag
644 for flag in "$@"; do
645 [[ ${flag} == -l* ]] && \
646 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
647 done
648
538 export LDFLAGS="${LDFLAGS} $*" 649 export LDFLAGS="${LDFLAGS} $*"
539 return 0 650 return 0
540} 651}
541 652
542# Remove flags from LDFLAGS - it's up to the ebuild to filter 653# @FUNCTION: filter-ldflags
543# CFLAGS and CXXFLAGS via filter-flags if they need to. 654# @USAGE: <flags>
655# @DESCRIPTION:
656# Remove particular <flags> from LDFLAGS. Accepts shell globs.
544filter-ldflags() { 657filter-ldflags() {
545 _filter-var LDFLAGS "$@" 658 _filter-var LDFLAGS "$@"
546 return 0 659 return 0
547} 660}
548 661
662# @FUNCTION: raw-ldflags
663# @USAGE: [flags]
664# @DESCRIPTION:
549# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 665# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
550# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 666# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
551# to gcc where it needs the '-Wl,'. 667# to gcc where it needs the '-Wl,'.
668#
669# If no flags are specified, then default to ${LDFLAGS}.
552raw-ldflags() { 670raw-ldflags() {
553 local x input="$@" 671 local x input="$@"
554 [[ -z ${input} ]] && input=${LDFLAGS} 672 [[ -z ${input} ]] && input=${LDFLAGS}
555 set -- 673 set --
556 for x in ${input} ; do 674 for x in ${input} ; do
558 set -- "$@" ${x//,/ } 676 set -- "$@" ${x//,/ }
559 done 677 done
560 echo "$@" 678 echo "$@"
561} 679}
562 680
563# Gets the flags needed for "NOW" binding 681# @FUNCTION: no-as-needed
564bindnow-flags() { 682# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
683no-as-needed() {
565 case $($(tc-getLD) -v 2>&1 </dev/null) in 684 case $($(tc-getLD) -v 2>&1 </dev/null) in
566 *GNU* | *'with BFD'*) # GNU ld 685 *GNU*) # GNU ld
567 echo "-Wl,-z,now" ;; 686 echo "-Wl,--no-as-needed" ;;
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 687 esac
578} 688}
579
580 689
581# Some tests for when we screw with things and want to make 690# Some tests for when we screw with things and want to make
582# sure we didn't break anything 691# sure we didn't break anything
583#TESTS() { 692#TESTS() {
584# CFLAGS="-a -b -c=1" 693# CFLAGS="-a -b -c=1"
601# [[ ${CXXFLAGS} == "-y -z=2" ]] || die 710# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
602# 711#
603# echo "All tests pass" 712# echo "All tests pass"
604#} 713#}
605#TESTS 714#TESTS
715
716fi

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