/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.41 - (show annotations) (download)
Mon Aug 1 07:27:27 2005 UTC (9 years, 1 month ago) by kevquinn
Branch: MAIN
Changes since 1.40: +41 -1 lines
Added functions to read/check gcc specs (for use in checking hardened toolchain state)

1 # Copyright 1999-2005 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.40 2005/07/11 15:08:06 swegener Exp $
4 #
5 # Author: Toolchain Ninjas <ninjas@gentoo.org>
6 #
7 # This eclass contains (or should) functions to get common info
8 # about the toolchain (libc/compiler/binutils/etc...)
9
10 inherit multilib
11
12
13 DESCRIPTION="Based on the ${ECLASS} eclass"
14
15 tc-getPROG() {
16 local var=$1
17 local prog=$2
18
19 if [[ -n ${!var} ]] ; then
20 echo "${!var}"
21 return 0
22 fi
23
24 local search=
25 [[ -n $3 ]] && search=$(type -p "$3-${prog}")
26 [[ -z ${search} && -n $(get_abi_CHOST) ]] && search=$(type -p "$(get_abi_CHOST)-${prog}")
27 [[ -z ${search} && -n ${CHOST} ]] && search=$(type -p "${CHOST}-${prog}")
28 [[ -n ${search} ]] && prog=${search##*/}
29
30 export ${var}=${prog}
31 echo "${!var}"
32 }
33
34 # Returns the name of the archiver
35 tc-getAR() { tc-getPROG AR ar "$@"; }
36 # Returns the name of the assembler
37 tc-getAS() { tc-getPROG AS as "$@"; }
38 # Returns the name of the C compiler
39 tc-getCC() { tc-getPROG CC gcc "$@"; }
40 # Returns the name of the C++ compiler
41 tc-getCXX() { tc-getPROG CXX g++ "$@"; }
42 # Returns the name of the linker
43 tc-getLD() { tc-getPROG LD ld "$@"; }
44 # Returns the name of the symbol/object thingy
45 tc-getNM() { tc-getPROG NM nm "$@"; }
46 # Returns the name of the archiver indexer
47 tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
48 # Returns the name of the fortran compiler
49 tc-getF77() { tc-getPROG F77 f77 "$@"; }
50 # Returns the name of the java compiler
51 tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
52
53 # Returns the name of the C compiler for build
54 tc-getBUILD_CC() {
55 if [[ -n ${CC_FOR_BUILD} ]] ; then
56 export BUILD_CC=${CC_FOR_BUILD}
57 echo "${CC_FOR_BUILD}"
58 return 0
59 fi
60
61 local search=
62 if [[ -n ${CBUILD} ]] ; then
63 search=$(type -p ${CBUILD}-gcc)
64 search=${search##*/}
65 else
66 search=gcc
67 fi
68
69 export BUILD_CC=${search}
70 echo "${search}"
71 }
72
73 # Quick way to export a bunch of vars at once
74 tc-export() {
75 local var
76 for var in "$@" ; do
77 eval tc-get${var} > /dev/null
78 done
79 }
80
81 # A simple way to see if we're using a cross-compiler ...
82 tc-is-cross-compiler() {
83 if [[ -n ${CBUILD} ]] ; then
84 return $([[ ${CBUILD} != ${CHOST} ]])
85 fi
86 return 1
87 }
88
89
90 # Parse information from CBUILD/CHOST/CTARGET rather than
91 # use external variables from the profile.
92 tc-ninja_magic_to_arch() {
93 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
94
95 local type=$1
96 local host=$2
97 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
98
99 case ${host} in
100 alpha*) echo alpha;;
101 x86_64*) ninj x86_64 amd64;;
102 arm*) echo arm;;
103 hppa*) ninj parisc hppa;;
104 ia64*) echo ia64;;
105 m68*) echo m68k;;
106 mips*) echo mips;;
107 powerpc64*) echo ppc64;;
108 powerpc*) [[ ${PROFILE_ARCH} == "ppc64" ]] \
109 && ninj ppc64 ppc \
110 || echo ppc
111 ;;
112 sparc64*) ninj sparc64 sparc;;
113 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
114 && ninj sparc64 sparc \
115 || echo sparc
116 ;;
117 s390*) echo s390;;
118 sh64*) ninj sh64 sh;;
119 sh*) echo sh;;
120 i?86*) ninj i386 x86;;
121 *) echo ${ARCH};;
122 esac
123 }
124 tc-arch-kernel() {
125 tc-ninja_magic_to_arch kern $@
126 }
127 tc-arch() {
128 tc-ninja_magic_to_arch portage $@
129 }
130 tc-endian() {
131 local host=$1
132 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
133 host=${host%%-*}
134
135 case ${host} in
136 alpha*) echo big;;
137 x86_64*) echo little;;
138 arm*b*) echo big;;
139 arm*) echo little;;
140 hppa*) echo big;;
141 ia64*) echo little;;
142 m68*) echo big;;
143 mips*l*) echo little;;
144 mips*) echo big;;
145 powerpc*) echo big;;
146 sparc*) echo big;;
147 s390*) echo big;;
148 sh*b*) echo big;;
149 sh*) echo little;;
150 i?86*) echo little;;
151 *) echo wtf;;
152 esac
153 }
154
155 # Returns the version as by `$CC -dumpversion`
156 gcc-fullversion() {
157 echo "$($(tc-getCC) -dumpversion)"
158 }
159 # Returns the version, but only the <major>.<minor>
160 gcc-version() {
161 echo "$(gcc-fullversion | cut -f1,2 -d.)"
162 }
163 # Returns the Major version
164 gcc-major-version() {
165 echo "$(gcc-version | cut -f1 -d.)"
166 }
167 # Returns the Minor version
168 gcc-minor-version() {
169 echo "$(gcc-version | cut -f2 -d.)"
170 }
171 # Returns the Micro version
172 gcc-micro-version() {
173 echo "$(gcc-fullversion | cut -f3 -d. | cut -f1 -d-)"
174 }
175
176 # Returns requested gcc specs directive
177 # Note; if a spec exists more than once (e.g. in more than one specs file)
178 # the last one read is the active definition - i.e. they do not accumulate,
179 # each new definition replaces any previous definition.
180 gcc-specs-directive() {
181 local specfiles=$($(tc-getCC) -v 2>&1 | grep "^Reading" | awk '{print $NF}')
182 awk -v spec=$1 \
183 'BEGIN { sstr=""; outside=1 }
184 $1=="*"spec":" { sstr=""; outside=0; next }
185 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
186 { sstr=sstr $0 }
187 END { print sstr }' ${specfiles}
188 }
189
190 # Returns true if gcc sets relro
191 gcc-specs-relro() {
192 local directive
193 directive=$(gcc-specs-directive link_command)
194 return $([[ ${directive/\{!norelro:} != ${directive} ]])
195 }
196 # Returns true if gcc sets now
197 gcc-specs-now() {
198 local directive
199 directive=$(gcc-specs-directive link_command)
200 return $([[ ${directive/\{!nonow:} != ${directive} ]])
201 }
202 # Returns true if gcc builds PIEs
203 gcc-specs-pie() {
204 local directive
205 directive=$(gcc-specs-directive cc1)
206 return $([[ ${directive/\{!nopie:} != ${directive} ]])
207 }
208 # Returns true if gcc builds with the stack protector
209 gcc-specs-ssp() {
210 local directive
211 directive=$(gcc-specs-directive cc1)
212 return $([[ ${directive/\{!fno-stack-protector:} != ${directive} ]])
213 }

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