1 | # Copyright 1999-2002 Gentoo Technologies, Inc. |
1 | # Copyright 1999-2003 Gentoo Technologies, Inc. |
2 | # Distributed under the terms of the GNU General Public License v2 |
2 | # Distributed under the terms of the GNU General Public License v2 |
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3 | # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.53 2004/06/01 04:28:38 solar Exp $ |
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4 | # |
3 | # Author Bart Verwilst <verwilst@gentoo.org> |
5 | # Author Bart Verwilst <verwilst@gentoo.org> |
4 | # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.11 2002/12/22 12:11:56 cretin Exp $ |
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5 | |
6 | |
6 | ECLASS=flag-o-matic |
7 | ECLASS=flag-o-matic |
7 | INHERITED="$INHERITED $ECLASS" |
8 | INHERITED="$INHERITED $ECLASS" |
8 | |
9 | |
9 | # |
10 | # |
10 | #### filter-flags <flag> #### |
11 | #### filter-flags <flags> #### |
11 | # Remove particular flags from C[XX]FLAGS |
12 | # Remove particular flags from C[XX]FLAGS |
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13 | # Matches only complete flags |
12 | # |
14 | # |
13 | #### append-flags <flag> #### |
15 | #### append-flags <flags> #### |
14 | # Add extra flags to your current C[XX]FLAGS |
16 | # Add extra flags to your current C[XX]FLAGS |
15 | # |
17 | # |
16 | #### replace-flags <orig.flag> <new.flag> ### |
18 | #### replace-flags <orig.flag> <new.flag> ### |
17 | # Replace a flag by another one |
19 | # Replace a flag by another one |
18 | # |
20 | # |
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21 | #### replace-cpu-flags <new.cpu> <old.cpus> ### |
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22 | # Replace march/mcpu flags that specify <old.cpus> |
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23 | # with flags that specify <new.cpu> |
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24 | # |
19 | #### is-flag <flag> #### |
25 | #### is-flag <flag> #### |
20 | # Returns "true" if flag is set in C[XX]FLAGS |
26 | # Returns "true" if flag is set in C[XX]FLAGS |
21 | # Matches only complete flag |
27 | # Matches only complete a flag |
22 | # |
28 | # |
23 | #### strip-flags #### |
29 | #### strip-flags #### |
24 | # Strip C[XX]FLAGS of everything except known |
30 | # Strip C[XX]FLAGS of everything except known |
25 | # good options. |
31 | # good options. |
26 | # |
32 | # |
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33 | #### strip-unsupported-flags #### |
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34 | # Strip C[XX]FLAGS of any flags not supported by |
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35 | # installed version of gcc |
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36 | # |
27 | #### get-flag <flag> #### |
37 | #### get-flag <flag> #### |
28 | # Find and echo the value for a particular flag |
38 | # Find and echo the value for a particular flag |
29 | # |
39 | # |
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40 | #### replace-sparc64-flags #### |
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41 | # Sets mcpu to v8 and uses the original value |
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42 | # as mtune if none specified. |
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43 | # |
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44 | #### filter-mfpmath <math types> #### |
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45 | # Remove specified math types from the fpmath specification |
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46 | # If the user has -mfpmath=sse,386, running `filter-mfpmath sse` |
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47 | # will leave the user with -mfpmath=386 |
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48 | # |
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49 | #### append-ldflags #### |
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50 | # Add extra flags to your current LDFLAGS |
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51 | # |
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52 | #### filter-ldflags <flags> #### |
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53 | # Remove particular flags from LDFLAGS |
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54 | # Matches only complete flags |
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55 | # |
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56 | #### etexec-flags #### |
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57 | # hooked function for hardened gcc that appends |
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58 | # -fno-pic to {C,CXX,LD}FLAGS |
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59 | # when a package is filtering -fpic, -fPIC, -fpie, -fPIE |
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60 | # |
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61 | #### fstack-flags #### |
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62 | # hooked function for hardened gcc that appends |
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63 | # -fno-stack-protector to {C,CXX,LD}FLAGS |
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64 | # when a package is filtering -fstack-protector, -fstack-protector-all |
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65 | # notice: modern automatic specs files will also suppress -fstack-protector-all |
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66 | # when only -fno-stack-protector is given |
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67 | # |
30 | |
68 | |
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69 | # C[XX]FLAGS that we allow in strip-flags |
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70 | setup-allowed-flags() { |
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71 | if [ -z "${ALLOWED_FLAGS}" ] ; then |
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72 | export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" |
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73 | case "${ARCH}" in |
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74 | mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; |
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75 | amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; |
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76 | x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; |
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77 | alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; |
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78 | ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; |
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79 | esac |
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80 | fi |
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81 | |
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82 | # C[XX]FLAGS that we are think is ok, but needs testing |
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83 | # NOTE: currently -Os have issues with gcc3 and K6* arch's |
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84 | export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" |
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85 | return 0 |
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86 | } |
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87 | |
31 | filter-flags () { |
88 | filter-flags() { |
32 | |
89 | for x in "$@" ; do |
33 | for x in $1 |
90 | case "${x}" in |
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91 | -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; |
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92 | -fstack-protector|-fstack-protector-all) fstack-flags;; |
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93 | *) ;; |
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94 | esac |
34 | do |
95 | done |
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96 | |
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97 | # we do this fancy spacing stuff so as to not filter |
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98 | # out part of a flag ... we want flag atoms ! :D |
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99 | CFLAGS=" ${CFLAGS} " |
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100 | CXXFLAGS=" ${CXXFLAGS} " |
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101 | for x in "$@" ; do |
35 | export CFLAGS="${CFLAGS/${x}}" |
102 | CFLAGS="${CFLAGS// ${x} / }" |
36 | export CXXFLAGS="${CXXFLAGS/${x}}" |
103 | CXXFLAGS="${CXXFLAGS// ${x} / }" |
37 | done |
104 | done |
38 | |
105 | CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" |
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106 | CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" |
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107 | return 0 |
39 | } |
108 | } |
40 | |
109 | |
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110 | filter-lfs-flags() { |
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111 | filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
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112 | } |
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113 | |
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114 | append-lfs-flags() { |
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115 | append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
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116 | } |
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117 | |
41 | append-flags () { |
118 | append-flags() { |
42 | |
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43 | CFLAGS="${CFLAGS} $1" |
119 | export CFLAGS="${CFLAGS} $@" |
44 | CXXFLAGS="${CXXFLAGS} $1" |
120 | export CXXFLAGS="${CXXFLAGS} $@" |
45 | |
121 | [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags |
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122 | return 0 |
46 | } |
123 | } |
47 | |
124 | |
48 | replace-flags () { |
125 | replace-flags() { |
49 | |
126 | # we do this fancy spacing stuff so as to not filter |
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127 | # out part of a flag ... we want flag atoms ! :D |
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128 | CFLAGS=" ${CFLAGS} " |
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129 | CXXFLAGS=" ${CXXFLAGS} " |
50 | CFLAGS="${CFLAGS/${1}/${2} }" |
130 | CFLAGS="${CFLAGS// ${1} / ${2} }" |
51 | CXXFLAGS="${CXXFLAGS/${1}/${2} }" |
131 | CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" |
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132 | CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" |
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133 | CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" |
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134 | return 0 |
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135 | } |
52 | |
136 | |
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137 | replace-cpu-flags() { |
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138 | local newcpu="$1" ; shift |
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139 | local oldcpu="" |
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140 | for oldcpu in "$@" ; do |
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141 | replace-flags -march=${oldcpu} -march=${newcpu} |
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142 | replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} |
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143 | replace-flags -mtune=${oldcpu} -mtune=${newcpu} |
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144 | done |
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145 | return 0 |
53 | } |
146 | } |
54 | |
147 | |
55 | is-flag() { |
148 | is-flag() { |
56 | |
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57 | for x in ${CFLAGS} ${CXXFLAGS} |
149 | for x in ${CFLAGS} ${CXXFLAGS} ; do |
58 | do |
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59 | if [ "${x}" = "$1" ] |
150 | if [ "${x}" == "$1" ] ; then |
60 | then |
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61 | echo true |
151 | echo true |
62 | break |
152 | return 0 |
63 | fi |
153 | fi |
64 | done |
154 | done |
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155 | return 1 |
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156 | } |
65 | |
157 | |
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158 | filter-mfpmath() { |
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159 | # save the original -mfpmath flag |
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160 | local orig_mfpmath="`get-flag -mfpmath`" |
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161 | # get the value of the current -mfpmath flag |
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162 | local new_math=" `get-flag mfpmath | tr , ' '` " |
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163 | # figure out which math values are to be removed |
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164 | local prune_math="" |
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165 | for prune_math in "$@" ; do |
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166 | new_math="${new_math/ ${prune_math} / }" |
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167 | done |
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168 | new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" |
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169 | |
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170 | if [ -z "${new_math}" ] ; then |
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171 | # if we're removing all user specified math values are |
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172 | # slated for removal, then we just filter the flag |
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173 | filter-flags ${orig_mfpmath} |
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174 | else |
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175 | # if we only want to filter some of the user specified |
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176 | # math values, then we replace the current flag |
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177 | replace-flags ${orig_mfpmath} -mfpmath=${new_math} |
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178 | fi |
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179 | return 0 |
66 | } |
180 | } |
67 | |
181 | |
68 | strip-flags() { |
182 | strip-flags() { |
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183 | setup-allowed-flags |
69 | |
184 | |
70 | local NEW_CFLAGS="" |
185 | local NEW_CFLAGS="" |
71 | local NEW_CXXFLAGS="" |
186 | local NEW_CXXFLAGS="" |
72 | |
187 | |
73 | local ALLOWED_FLAGS="-O -mcpu -march -pipe -g" |
188 | # Allow unstable C[XX]FLAGS if we are using unstable profile ... |
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189 | if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then |
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190 | use debug && einfo "Enabling the use of some unstable flags" |
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191 | ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" |
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192 | fi |
74 | |
193 | |
75 | set -f |
194 | set -f |
76 | |
195 | |
77 | for x in ${CFLAGS} |
196 | for x in ${CFLAGS} |
78 | do |
197 | do |
79 | for y in ${ALLOWED_FLAGS} |
198 | for y in ${ALLOWED_FLAGS} |
80 | do |
199 | do |
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200 | flag=${x%%=*} |
81 | if [ "${x/${y}}" != "${x}" ] |
201 | if [ "${flag%%${y}}" = "" ] |
82 | then |
202 | then |
83 | if [ -z "${NEW_CFLAGS}" ] |
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84 | then |
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85 | NEW_CFLAGS="${x}" |
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86 | else |
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87 | NEW_CFLAGS="${NEW_CFLAGS} ${x}" |
203 | NEW_CFLAGS="${NEW_CFLAGS} ${x}" |
88 | fi |
204 | break |
89 | fi |
205 | fi |
90 | done |
206 | done |
91 | done |
207 | done |
92 | |
208 | |
93 | for x in ${CXXFLAGS} |
209 | for x in ${CXXFLAGS} |
94 | do |
210 | do |
95 | for y in ${ALLOWED_FLAGS} |
211 | for y in ${ALLOWED_FLAGS} |
96 | do |
212 | do |
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213 | flag=${x%%=*} |
97 | if [ "${x/${y}}" != "${x}" ] |
214 | if [ "${flag%%${y}}" = "" ] |
98 | then |
215 | then |
99 | if [ -z "${NEW_CXXFLAGS}" ] |
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100 | then |
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101 | NEW_CXXFLAGS="${x}" |
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102 | else |
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103 | NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" |
216 | NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" |
104 | fi |
217 | break |
105 | fi |
218 | fi |
106 | done |
219 | done |
107 | done |
220 | done |
108 | |
221 | |
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222 | # In case we filtered out all optimization flags fallback to -O2 |
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223 | if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then |
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224 | NEW_CFLAGS="${NEW_CFLAGS} -O2" |
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225 | fi |
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226 | if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then |
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227 | NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" |
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228 | fi |
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229 | |
109 | set +f |
230 | set +f |
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231 | |
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232 | use debug \ |
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233 | && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \ |
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234 | && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\"" |
110 | |
235 | |
111 | export CFLAGS="${NEW_CFLAGS}" |
236 | export CFLAGS="${NEW_CFLAGS}" |
112 | export CXXFLAGS="${NEW_CXXFLAGS}" |
237 | export CXXFLAGS="${NEW_CXXFLAGS}" |
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238 | return 0 |
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239 | } |
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240 | |
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241 | test_flag() { |
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242 | if [ -z "`gcc -S -xc "$@" -o /dev/null /dev/null 2>&1`" ]; then |
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243 | echo "$@" |
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244 | return 0 |
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245 | fi |
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246 | return 1 |
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247 | } |
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248 | |
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249 | strip-unsupported-flags() { |
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250 | for x in ${CFLAGS} ; do |
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251 | NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" |
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252 | done |
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253 | for x in ${CXXFLAGS} ; do |
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254 | NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`" |
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255 | done |
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256 | |
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257 | export CFLAGS="${NEW_CFLAGS}" |
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258 | export CXXFLAGS="${NEW_CXXFLAGS}" |
113 | } |
259 | } |
114 | |
260 | |
115 | get-flag() { |
261 | get-flag() { |
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262 | # this code looks a little flaky but seems to work for |
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263 | # everything we want ... |
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264 | # for example, if CFLAGS="-march=i686": |
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265 | # `get-flags -march` == "-march=i686" |
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266 | # `get-flags march` == "i686" |
116 | local findflag="$1" |
267 | local findflag="$1" |
117 | |
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118 | for f in ${CFLAGS} ${CXXFLAGS} ; do |
268 | for f in ${CFLAGS} ${CXXFLAGS} ; do |
119 | if [ "${f/${findflag}}" != "${f}" ] ; then |
269 | if [ "${f/${findflag}}" != "${f}" ] ; then |
120 | echo "${f/-${findflag}=}" |
270 | echo "${f/-${findflag}=}" |
121 | return |
271 | return 0 |
122 | fi |
272 | fi |
123 | done |
273 | done |
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274 | return 1 |
124 | } |
275 | } |
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276 | |
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277 | has_hardened() { |
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278 | local cc=${CC:-gcc} |
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279 | [[ $(${cc%% *} --version 2>&1) == *Hardened* ]] |
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280 | return $? |
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281 | } |
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282 | |
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283 | has_pic() { |
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284 | [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 |
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285 | [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 |
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286 | [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0 |
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287 | return 1 |
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288 | } |
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289 | |
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290 | has_pie() { |
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291 | [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 |
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292 | [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 |
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293 | [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0 |
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294 | return 1 |
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295 | } |
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296 | |
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297 | has_ssp() { |
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298 | [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 |
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299 | [ ! -z "`${CC/ .*/} --version| grep ssp`" ] && return 0 |
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300 | return 1 |
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301 | } |
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302 | |
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303 | replace-sparc64-flags() { |
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304 | local SPARC64_CPUS="ultrasparc v9" |
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305 | |
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306 | if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] |
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307 | then |
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308 | for x in ${SPARC64_CPUS} |
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309 | do |
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310 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" |
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311 | done |
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312 | else |
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313 | for x in ${SPARC64_CPUS} |
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314 | do |
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315 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
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316 | done |
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317 | fi |
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318 | |
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319 | if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] |
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320 | then |
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321 | for x in ${SPARC64_CPUS} |
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322 | do |
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323 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" |
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324 | done |
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325 | else |
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326 | for x in ${SPARC64_CPUS} |
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327 | do |
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328 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
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329 | done |
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330 | fi |
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331 | } |
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332 | |
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333 | append-ldflags() { |
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334 | LDFLAGS="${LDFLAGS} $@" |
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335 | return 0 |
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336 | } |
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337 | |
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338 | filter-ldflags() { |
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339 | # we do this fancy spacing stuff so as to not filter |
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340 | # out part of a flag ... we want flag atoms ! :D |
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341 | LDFLAGS=" ${LDFLAGS} " |
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342 | for x in "$@" ; do |
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343 | LDFLAGS="${LDFLAGS// ${x} / }" |
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344 | done |
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345 | LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" |
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346 | return 0 |
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347 | } |
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348 | |
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349 | etexec-flags() { |
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350 | # if your not using a hardened compiler you wont need this |
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351 | # PIC/no-pic kludge in the first place. |
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352 | has_hardened || return |
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353 | |
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354 | has_pie || has_pic |
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355 | if [ $? == 0 ] ; then |
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356 | [ -z "`is-flag -fno-pic`" ] && |
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357 | export CFLAGS="${CFLAGS} `test_flag -fno-pic`" |
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358 | |
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359 | [ -z "`is-flag -nopie`" ] && |
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360 | export CFLAGS="${CFLAGS} `test_flag -nopie`" |
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361 | fi |
|
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362 | } |
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363 | |
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364 | fstack-flags() { |
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365 | has_ssp |
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366 | if [ $? == 0 ] ; then |
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367 | [ -z "`is-flag -fno-stack-protector`" ] && |
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368 | export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" |
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369 | fi |
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370 | } |