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 1.48 2004/05/06 02:36:37 vapier 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 1.10 2002/11/25 04:39:33 vapier 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 | # -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed |
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59 | # and 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 | # -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed |
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64 | # and a package is filtering -fstack-protector, -fstack-protector-all |
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65 | # |
30 | |
66 | |
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67 | # C[XX]FLAGS that we allow in strip-flags |
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68 | setup-allowed-flags() { |
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69 | if [ -z "${ALLOWED_FLAGS}" ] ; then |
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70 | export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" |
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71 | case "${ARCH}" in |
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72 | mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; |
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73 | amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; |
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74 | alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; |
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75 | ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; |
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76 | esac |
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77 | fi |
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78 | |
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79 | # C[XX]FLAGS that we are think is ok, but needs testing |
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80 | # NOTE: currently -Os have issues with gcc3 and K6* arch's |
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81 | export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" |
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82 | return 0 |
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83 | } |
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84 | |
31 | filter-flags () { |
85 | filter-flags() { |
32 | |
86 | for x in "$@" ; do |
33 | for x in $1 |
87 | case "${x}" in |
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88 | -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; |
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89 | -fstack-protector|-fstack-protector-all) fstack-flags;; |
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90 | *) ;; |
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91 | esac |
34 | do |
92 | done |
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93 | |
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94 | # we do this fancy spacing stuff so as to not filter |
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95 | # out part of a flag ... we want flag atoms ! :D |
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96 | CFLAGS=" ${CFLAGS} " |
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97 | CXXFLAGS=" ${CXXFLAGS} " |
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98 | for x in "$@" ; do |
35 | export CFLAGS="${CFLAGS/${x}}" |
99 | CFLAGS="${CFLAGS// ${x} / }" |
36 | export CXXFLAGS="${CXXFLAGS/${x}}" |
100 | CXXFLAGS="${CXXFLAGS// ${x} / }" |
37 | done |
101 | done |
38 | |
102 | CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" |
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103 | CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" |
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104 | return 0 |
39 | } |
105 | } |
40 | |
106 | |
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107 | filter-lfs-flags() { |
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108 | filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
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109 | } |
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110 | |
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111 | append-lfs-flags() { |
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112 | append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
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113 | } |
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114 | |
41 | append-flags () { |
115 | append-flags() { |
42 | |
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43 | CFLAGS="${CFLAGS} $1" |
116 | export CFLAGS="${CFLAGS} $@" |
44 | CXXFLAGS="${CXXFLAGS} $1" |
117 | export CXXFLAGS="${CXXFLAGS} $@" |
45 | |
118 | [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags |
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119 | return 0 |
46 | } |
120 | } |
47 | |
121 | |
48 | replace-flags () { |
122 | replace-flags() { |
49 | |
123 | # we do this fancy spacing stuff so as to not filter |
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124 | # out part of a flag ... we want flag atoms ! :D |
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125 | CFLAGS=" ${CFLAGS} " |
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126 | CXXFLAGS=" ${CXXFLAGS} " |
50 | CFLAGS="${CFLAGS/${1}/${2} }" |
127 | CFLAGS="${CFLAGS// ${1} / ${2} }" |
51 | CXXFLAGS="${CXXFLAGS/${1}/${2} }" |
128 | CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" |
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129 | CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" |
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130 | CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" |
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131 | return 0 |
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132 | } |
52 | |
133 | |
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134 | replace-cpu-flags() { |
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135 | local newcpu="$1" ; shift |
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136 | local oldcpu="" |
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137 | for oldcpu in "$@" ; do |
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138 | replace-flags -march=${oldcpu} -march=${newcpu} |
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139 | replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} |
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140 | replace-flags -mtune=${oldcpu} -mtune=${newcpu} |
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141 | done |
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142 | return 0 |
53 | } |
143 | } |
54 | |
144 | |
55 | is-flag() { |
145 | is-flag() { |
56 | |
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57 | for x in ${CFLAGS} ${CXXFLAGS} |
146 | for x in ${CFLAGS} ${CXXFLAGS} ; do |
58 | do |
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59 | if [ "${x}" = "$1" ] |
147 | if [ "${x}" == "$1" ] ; then |
60 | then |
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61 | echo true |
148 | echo true |
62 | break |
149 | return 0 |
63 | fi |
150 | fi |
64 | done |
151 | done |
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152 | return 1 |
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153 | } |
65 | |
154 | |
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155 | filter-mfpmath() { |
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156 | # save the original -mfpmath flag |
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157 | local orig_mfpmath="`get-flag -mfpmath`" |
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158 | # get the value of the current -mfpmath flag |
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159 | local new_math=" `get-flag mfpmath | tr , ' '` " |
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160 | # figure out which math values are to be removed |
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161 | local prune_math="" |
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162 | for prune_math in "$@" ; do |
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163 | new_math="${new_math/ ${prune_math} / }" |
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164 | done |
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165 | new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" |
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166 | |
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167 | if [ -z "${new_math}" ] ; then |
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168 | # if we're removing all user specified math values are |
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169 | # slated for removal, then we just filter the flag |
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170 | filter-flags ${orig_mfpmath} |
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171 | else |
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172 | # if we only want to filter some of the user specified |
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173 | # math values, then we replace the current flag |
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174 | replace-flags ${orig_mfpmath} -mfpmath=${new_math} |
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175 | fi |
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176 | return 0 |
66 | } |
177 | } |
67 | |
178 | |
68 | strip-flags() { |
179 | strip-flags() { |
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180 | setup-allowed-flags |
69 | |
181 | |
70 | local NEW_CFLAGS="" |
182 | local NEW_CFLAGS="" |
71 | local NEW_CXXFLAGS="" |
183 | local NEW_CXXFLAGS="" |
72 | |
184 | |
73 | local ALLOWED_FLAGS="-O -mcpu -march -pipe" |
185 | # Allow unstable C[XX]FLAGS if we are using unstable profile ... |
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186 | if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then |
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187 | [ `use debug` ] && einfo "Enabling the use of some unstable flags" |
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188 | ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" |
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189 | fi |
74 | |
190 | |
75 | set -f |
191 | set -f |
76 | |
192 | |
77 | for x in ${CFLAGS} |
193 | for x in ${CFLAGS} |
78 | do |
194 | do |
79 | for y in ${ALLOWED_FLAGS} |
195 | for y in ${ALLOWED_FLAGS} |
80 | do |
196 | do |
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197 | flag=${x%%=*} |
81 | if [ "${x/${y}}" != "${x}" ] |
198 | if [ "${flag%%${y}}" = "" ] |
82 | then |
199 | then |
83 | if [ -z "${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} ${x}" |
200 | NEW_CFLAGS="${NEW_CFLAGS} ${x}" |
88 | fi |
201 | break |
89 | fi |
202 | fi |
90 | done |
203 | done |
91 | done |
204 | done |
92 | |
205 | |
93 | for x in ${CXXFLAGS} |
206 | for x in ${CXXFLAGS} |
94 | do |
207 | do |
95 | for y in ${ALLOWED_FLAGS} |
208 | for y in ${ALLOWED_FLAGS} |
96 | do |
209 | do |
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210 | flag=${x%%=*} |
97 | if [ "${x/${y}}" != "${x}" ] |
211 | if [ "${flag%%${y}}" = "" ] |
98 | then |
212 | then |
99 | if [ -z "${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} ${x}" |
213 | NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" |
104 | fi |
214 | break |
105 | fi |
215 | fi |
106 | done |
216 | done |
107 | done |
217 | done |
108 | |
218 | |
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219 | # In case we filtered out all optimization flags fallback to -O2 |
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220 | if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then |
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221 | NEW_CFLAGS="${NEW_CFLAGS} -O2" |
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222 | fi |
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223 | if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then |
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224 | NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" |
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225 | fi |
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226 | |
109 | set +f |
227 | set +f |
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228 | |
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229 | [ `use debug` ] \ |
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230 | && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \ |
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231 | && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\"" |
110 | |
232 | |
111 | export CFLAGS="${NEW_CFLAGS}" |
233 | export CFLAGS="${NEW_CFLAGS}" |
112 | export CXXFLAGS="${NEW_CXXFLAGS}" |
234 | export CXXFLAGS="${NEW_CXXFLAGS}" |
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235 | return 0 |
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236 | } |
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237 | |
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238 | test_flag() { |
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239 | if [ -z "`gcc -S -xc "$@" -o /dev/null /dev/null 2>&1`" ]; then |
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240 | echo "$@" |
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241 | return 0 |
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242 | fi |
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243 | return 1 |
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244 | } |
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245 | |
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246 | strip-unsupported-flags() { |
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247 | for x in ${CFLAGS} ; do |
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248 | NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" |
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249 | done |
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250 | for x in ${CXXFLAGS} ; do |
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251 | NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`" |
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252 | done |
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253 | |
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254 | export CFLAGS="${NEW_CFLAGS}" |
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255 | export CXXFLAGS="${NEW_CXXFLAGS}" |
113 | } |
256 | } |
114 | |
257 | |
115 | get-flag() { |
258 | get-flag() { |
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259 | # this code looks a little flaky but seems to work for |
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260 | # everything we want ... |
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261 | # for example, if CFLAGS="-march=i686": |
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262 | # `get-flags -march` == "-march=i686" |
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263 | # `get-flags march` == "i686" |
116 | local findflag="$1" |
264 | local findflag="$1" |
117 | |
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118 | for f in ${CFLAGS} ${CXXFLAGS} ; do |
265 | for f in ${CFLAGS} ${CXXFLAGS} ; do |
119 | if [ "${f/${findflag}}" != "${f}" ] ; then |
266 | if [ "${f/${findflag}}" != "${f}" ] ; then |
120 | echo "${f/-${findflag}=}" |
267 | echo "${f/-${findflag}=}" |
121 | return |
268 | return 0 |
122 | fi |
269 | fi |
123 | done |
270 | done |
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271 | return 1 |
124 | } |
272 | } |
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273 | |
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274 | has_pic() { |
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275 | [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 |
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276 | [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 |
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277 | has_version sys-devel/hardened-gcc && return 0 |
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278 | [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0 |
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279 | return 1 |
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280 | } |
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281 | |
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282 | has_pie() { |
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283 | [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 |
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284 | [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 |
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285 | has_version sys-devel/hardened-gcc && return 0 |
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286 | [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0 |
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287 | return 1 |
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288 | } |
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289 | |
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290 | has_ssp() { |
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291 | [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 |
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292 | has_version sys-devel/hardened-gcc && return 0 |
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293 | [ ! -z "`${CC/ .*/} --version| grep ssp`" ] && return 0 |
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294 | return 1 |
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295 | } |
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296 | |
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297 | replace-sparc64-flags() { |
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298 | local SPARC64_CPUS="ultrasparc v9" |
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299 | |
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300 | if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] |
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301 | then |
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302 | for x in ${SPARC64_CPUS} |
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303 | do |
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304 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" |
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305 | done |
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306 | else |
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307 | for x in ${SPARC64_CPUS} |
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308 | do |
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309 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
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310 | done |
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311 | fi |
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312 | |
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313 | if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] |
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314 | then |
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315 | for x in ${SPARC64_CPUS} |
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316 | do |
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317 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" |
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318 | done |
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319 | else |
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320 | for x in ${SPARC64_CPUS} |
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321 | do |
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322 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
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323 | done |
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324 | fi |
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325 | } |
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326 | |
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327 | append-ldflags() { |
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328 | LDFLAGS="${LDFLAGS} $@" |
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329 | return 0 |
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330 | } |
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331 | |
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332 | filter-ldflags() { |
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333 | # we do this fancy spacing stuff so as to not filter |
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334 | # out part of a flag ... we want flag atoms ! :D |
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335 | LDFLAGS=" ${LDFLAGS} " |
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336 | for x in "$@" ; do |
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337 | LDFLAGS="${LDFLAGS// ${x} / }" |
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338 | done |
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339 | LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" |
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340 | return 0 |
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341 | } |
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342 | |
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343 | etexec-flags() { |
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344 | has_pie || has_pic |
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345 | if [ $? == 0 ] ; then |
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346 | [ -z "`is-flag -yet_exec`" ] && |
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347 | export CFLAGS="${CFLAGS} `test_flag -yet_exec`" |
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348 | [ -z "`is-flag -nopie`" ] && |
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349 | export CFLAGS="${CFLAGS} `test_flag -nopie`" |
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350 | fi |
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351 | } |
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352 | |
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353 | fstack-flags() { |
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354 | has_ssp |
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355 | if [ $? == 0 ] ; then |
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356 | [ -z "`is-flag -yno_propolice`" ] && |
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357 | export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" |
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358 | fi |
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359 | } |