1 | # Copyright 1999-2003 Gentoo Technologies, Inc. |
1 | # Copyright 1999-2006 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 1.12 2003/02/16 04:26:21 vapier Exp $ |
3 | # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.114 2006/12/27 00:52:12 vapier Exp $ |
4 | # |
4 | # |
5 | # Author Bart Verwilst <verwilst@gentoo.org> |
5 | # Maintainer: base-system@gentoo.org |
6 | |
6 | |
7 | ECLASS=flag-o-matic |
7 | # need access to emktemp() |
8 | INHERITED="$INHERITED $ECLASS" |
8 | inherit eutils toolchain-funcs multilib |
9 | |
9 | |
10 | # |
10 | # |
11 | #### filter-flags <flag> #### |
11 | #### filter-flags <flags> #### |
12 | # Remove particular flags from C[XX]FLAGS |
12 | # Remove particular flags from C[XX]FLAGS |
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13 | # Matches only complete flags |
13 | # |
14 | # |
14 | #### append-flags <flag> #### |
15 | #### append-flags <flags> #### |
15 | # Add extra flags to your current C[XX]FLAGS |
16 | # Add extra flags to your current C[XX]FLAGS |
16 | # |
17 | # |
17 | #### replace-flags <orig.flag> <new.flag> ### |
18 | #### replace-flags <orig.flag> <new.flag> ### |
18 | # Replace a flag by another one |
19 | # Replace a flag by another one |
19 | # |
20 | # |
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21 | #### replace-cpu-flags <old.cpus> <new.cpu> ### |
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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 | # |
20 | #### is-flag <flag> #### |
25 | #### is-flag[q] <flag> #### |
21 | # Returns "true" if flag is set in C[XX]FLAGS |
26 | # Returns "true" if flag is set in C[XX]FLAGS |
22 | # Matches only complete flag |
27 | # Matches only complete a flag |
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28 | # q version sets return code but doesn't echo |
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29 | # |
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30 | #### is-ldflag[q] <flag> #### |
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31 | # Returns "true" if flag is set in LDFLAGS |
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32 | # Matches only complete a flag |
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33 | # q version sets return code but doesn't echo |
23 | # |
34 | # |
24 | #### strip-flags #### |
35 | #### strip-flags #### |
25 | # Strip C[XX]FLAGS of everything except known |
36 | # Strip C[XX]FLAGS of everything except known |
26 | # good options. |
37 | # good options. |
27 | # |
38 | # |
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39 | #### strip-unsupported-flags #### |
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40 | # Strip C[XX]FLAGS of any flags not supported by |
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41 | # installed version of gcc |
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42 | # |
28 | #### get-flag <flag> #### |
43 | #### get-flag <flag> #### |
29 | # Find and echo the value for a particular flag |
44 | # Find and echo the value for a particular flag |
30 | # |
45 | # |
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46 | #### replace-sparc64-flags #### |
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47 | # Sets mcpu to v8 and uses the original value |
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48 | # as mtune if none specified. |
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49 | # |
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50 | #### filter-mfpmath <math types> #### |
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51 | # Remove specified math types from the fpmath specification |
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52 | # If the user has -mfpmath=sse,386, running `filter-mfpmath sse` |
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53 | # will leave the user with -mfpmath=386 |
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54 | # |
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55 | #### append-ldflags #### |
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56 | # Add extra flags to your current LDFLAGS |
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57 | # |
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58 | #### filter-ldflags <flags> #### |
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59 | # Remove particular flags from LDFLAGS |
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60 | # Matches only complete flags |
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61 | # |
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62 | #### bindnow-flags #### |
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63 | # Returns the flags to enable "now" binding in the current selected linker. |
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64 | # |
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65 | ################ DEPRECATED functions ################ |
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66 | # The following are still present to avoid breaking existing |
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67 | # code more than necessary; however they are deprecated. Please |
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68 | # use gcc-specs-* from toolchain-funcs.eclass instead, if you |
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69 | # need to know which hardened techs are active in the compiler. |
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70 | # See bug #100974 |
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71 | # |
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72 | #### has_hardened #### |
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73 | # Returns true if the compiler has 'Hardened' in its version string, |
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74 | # (note; switched-spec vanilla compilers satisfy this condition) or |
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75 | # the specs file name contains 'hardened'. |
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76 | # |
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77 | #### has_pie #### |
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78 | # Returns true if the compiler by default or with current CFLAGS |
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79 | # builds position-independent code. |
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80 | # |
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81 | #### has_pic #### |
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82 | # Returns true if the compiler by default or with current CFLAGS |
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83 | # builds position-independent code. |
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84 | # |
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85 | #### has_ssp_all #### |
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86 | # Returns true if the compiler by default or with current CFLAGS |
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87 | # generates stack smash protections for all functions |
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88 | # |
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89 | #### has_ssp #### |
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90 | # Returns true if the compiler by default or with current CFLAGS |
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91 | # generates stack smash protections for most vulnerable functions |
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92 | # |
31 | |
93 | |
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94 | # C[XX]FLAGS that we allow in strip-flags |
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95 | setup-allowed-flags() { |
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96 | if [[ -z ${ALLOWED_FLAGS} ]] ; then |
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97 | export ALLOWED_FLAGS="-pipe" |
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98 | export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" |
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99 | export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" |
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100 | export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" |
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101 | export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" |
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102 | export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" |
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103 | export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" |
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104 | fi |
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105 | # allow a bunch of flags that negate features / control ABI |
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106 | ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" |
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107 | ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ |
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108 | -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ |
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109 | -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ |
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110 | -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ |
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111 | -mieee -mieee-with-inexact -mschedule \ |
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112 | -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ |
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113 | -mflat -mno-flat -mno-faster-structs -mfaster-structs \ |
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114 | -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ |
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115 | -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ |
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116 | -msecure-plt" |
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117 | |
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118 | # C[XX]FLAGS that we are think is ok, but needs testing |
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119 | # NOTE: currently -Os have issues with gcc3 and K6* arch's |
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120 | export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" |
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121 | return 0 |
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122 | } |
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123 | |
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124 | # inverted filters for hardened compiler. This is trying to unpick |
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125 | # the hardened compiler defaults. |
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126 | _filter-hardened() { |
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127 | local f |
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128 | for f in "$@" ; do |
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129 | case "${f}" in |
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130 | # Ideally we should only concern ourselves with PIE flags, |
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131 | # not -fPIC or -fpic, but too many places filter -fPIC without |
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132 | # thinking about -fPIE. |
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133 | -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) |
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134 | gcc-specs-pie || continue |
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135 | is-flagq -nopie || append-flags -nopie;; |
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136 | -fstack-protector) |
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137 | gcc-specs-ssp || continue |
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138 | is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; |
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139 | -fstack-protector-all) |
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140 | gcc-specs-ssp-to-all || continue |
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141 | is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; |
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142 | esac |
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143 | done |
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144 | } |
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145 | |
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146 | # Remove occurrences of strings from variable given in $1 |
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147 | # Strings removed are matched as globs, so for example |
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148 | # '-O*' would remove -O1, -O2 etc. |
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149 | _filter-var() { |
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150 | local f x VAR VAL |
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151 | declare -a new |
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152 | |
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153 | VAR=$1 |
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154 | shift |
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155 | eval VAL=\${${VAR}} |
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156 | for f in ${VAL}; do |
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157 | for x in "$@"; do |
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158 | # Note this should work with globs like -O* |
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159 | [[ ${f} == ${x} ]] && continue 2 |
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160 | done |
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161 | eval new\[\${\#new\[@]}]=\${f} |
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162 | done |
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163 | eval export ${VAR}=\${new\[*]} |
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164 | } |
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165 | |
32 | filter-flags () { |
166 | filter-flags() { |
33 | |
167 | _filter-hardened "$@" |
34 | for x in $1 |
168 | _filter-var CFLAGS "$@" |
35 | do |
169 | _filter-var CXXFLAGS "$@" |
36 | export CFLAGS="${CFLAGS/${x}}" |
170 | return 0 |
37 | export CXXFLAGS="${CXXFLAGS/${x}}" |
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38 | done |
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39 | |
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40 | } |
171 | } |
41 | |
172 | |
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173 | filter-lfs-flags() { |
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174 | [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" |
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175 | filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
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176 | } |
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177 | |
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178 | append-lfs-flags() { |
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179 | [[ -n $@ ]] && die "append-lfs-flags takes no arguments" |
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180 | append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
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181 | } |
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182 | |
42 | append-flags () { |
183 | append-flags() { |
43 | |
184 | [[ -z $* ]] && return 0 |
44 | CFLAGS="${CFLAGS} $1" |
185 | export CFLAGS="${CFLAGS} $*" |
45 | CXXFLAGS="${CXXFLAGS} $1" |
186 | export CXXFLAGS="${CXXFLAGS} $*" |
46 | |
187 | return 0 |
47 | } |
188 | } |
48 | |
189 | |
49 | replace-flags () { |
190 | replace-flags() { |
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191 | [[ $# != 2 ]] \ |
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192 | && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ |
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193 | && die "replace-flags takes 2 arguments, not $#" |
50 | |
194 | |
51 | CFLAGS="${CFLAGS/${1}/${2} }" |
195 | local f fset |
52 | CXXFLAGS="${CXXFLAGS/${1}/${2} }" |
196 | declare -a new_CFLAGS new_CXXFLAGS |
53 | |
197 | |
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198 | for fset in CFLAGS CXXFLAGS; do |
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199 | # Looping over the flags instead of using a global |
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200 | # substitution ensures that we're working with flag atoms. |
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201 | # Otherwise globs like -O* have the potential to wipe out the |
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202 | # list of flags. |
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203 | for f in ${!fset}; do |
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204 | # Note this should work with globs like -O* |
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205 | [[ ${f} == ${1} ]] && f=${2} |
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206 | eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} |
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207 | done |
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208 | eval export ${fset}=\${new_${fset}\[*]} |
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209 | done |
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210 | |
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211 | return 0 |
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212 | } |
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213 | |
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214 | replace-cpu-flags() { |
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215 | local newcpu="$#" ; newcpu="${!newcpu}" |
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216 | while [ $# -gt 1 ] ; do |
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217 | # quote to make sure that no globbing is done (particularly on |
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218 | # ${oldcpu}) prior to calling replace-flags |
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219 | replace-flags "-march=${1}" "-march=${newcpu}" |
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220 | replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" |
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221 | replace-flags "-mtune=${1}" "-mtune=${newcpu}" |
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222 | shift |
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223 | done |
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224 | return 0 |
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225 | } |
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226 | |
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227 | _is_flagq() { |
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228 | local x |
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229 | for x in ${!1} ; do |
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230 | [[ ${x} == $2 ]] && return 0 |
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231 | done |
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232 | return 1 |
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233 | } |
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234 | |
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235 | is-flagq() { |
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236 | [[ -n $2 ]] && die "Usage: is-flag <flag>" |
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237 | _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 |
54 | } |
238 | } |
55 | |
239 | |
56 | is-flag() { |
240 | is-flag() { |
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241 | is-flagq "$@" && echo true |
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242 | } |
57 | |
243 | |
58 | for x in ${CFLAGS} ${CXXFLAGS} |
244 | is-ldflagq() { |
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245 | [[ -n $2 ]] && die "Usage: is-ldflag <flag>" |
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246 | _is_flagq LDFLAGS $1 |
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247 | } |
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248 | |
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249 | is-ldflag() { |
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250 | is-ldflagq "$@" && echo true |
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251 | } |
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252 | |
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253 | filter-mfpmath() { |
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254 | local orig_mfpmath new_math prune_math |
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255 | |
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256 | # save the original -mfpmath flag |
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257 | orig_mfpmath=$(get-flag -mfpmath) |
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258 | # get the value of the current -mfpmath flag |
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259 | new_math=$(get-flag mfpmath) |
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260 | new_math=" ${new_math//,/ } " |
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261 | # figure out which math values are to be removed |
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262 | prune_math="" |
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263 | for prune_math in "$@" ; do |
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264 | new_math=${new_math/ ${prune_math} / } |
59 | do |
265 | done |
60 | if [ "${x}" = "$1" ] |
266 | new_math=$(echo ${new_math}) |
61 | then |
267 | new_math=${new_math// /,} |
62 | echo true |
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63 | break |
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64 | fi |
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65 | done |
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66 | |
268 | |
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269 | if [[ -z ${new_math} ]] ; then |
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270 | # if we're removing all user specified math values are |
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271 | # slated for removal, then we just filter the flag |
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272 | filter-flags ${orig_mfpmath} |
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273 | else |
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274 | # if we only want to filter some of the user specified |
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275 | # math values, then we replace the current flag |
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276 | replace-flags ${orig_mfpmath} -mfpmath=${new_math} |
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277 | fi |
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278 | return 0 |
67 | } |
279 | } |
68 | |
280 | |
69 | strip-flags() { |
281 | strip-flags() { |
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282 | local x y flag NEW_CFLAGS NEW_CXXFLAGS |
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283 | |
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284 | setup-allowed-flags |
70 | |
285 | |
71 | local NEW_CFLAGS="" |
286 | local NEW_CFLAGS="" |
72 | local NEW_CXXFLAGS="" |
287 | local NEW_CXXFLAGS="" |
73 | |
288 | |
74 | local ALLOWED_FLAGS="-O -mcpu -march -pipe -g" |
289 | # Allow unstable C[XX]FLAGS if we are using unstable profile ... |
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290 | if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then |
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291 | ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" |
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292 | fi |
75 | |
293 | |
76 | set -f |
294 | set -f # disable pathname expansion |
77 | |
295 | |
78 | for x in ${CFLAGS} |
296 | for x in ${CFLAGS}; do |
79 | do |
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80 | for y in ${ALLOWED_FLAGS} |
297 | for y in ${ALLOWED_FLAGS}; do |
81 | do |
298 | flag=${x%%=*} |
82 | if [ "${x/${y}}" != "${x}" ] |
299 | if [ "${flag%%${y}}" = "" ] ; then |
83 | then |
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84 | if [ -z "${NEW_CFLAGS}" ] |
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85 | then |
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86 | NEW_CFLAGS="${x}" |
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87 | else |
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88 | NEW_CFLAGS="${NEW_CFLAGS} ${x}" |
300 | NEW_CFLAGS="${NEW_CFLAGS} ${x}" |
89 | fi |
301 | break |
90 | fi |
302 | fi |
91 | done |
303 | done |
92 | done |
304 | done |
93 | |
305 | |
94 | for x in ${CXXFLAGS} |
306 | for x in ${CXXFLAGS}; do |
95 | do |
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96 | for y in ${ALLOWED_FLAGS} |
307 | for y in ${ALLOWED_FLAGS}; do |
97 | do |
308 | flag=${x%%=*} |
98 | if [ "${x/${y}}" != "${x}" ] |
309 | if [ "${flag%%${y}}" = "" ] ; then |
99 | then |
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100 | if [ -z "${NEW_CXXFLAGS}" ] |
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101 | then |
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102 | NEW_CXXFLAGS="${x}" |
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103 | else |
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104 | NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" |
310 | NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" |
105 | fi |
311 | break |
106 | fi |
312 | fi |
107 | done |
313 | done |
108 | done |
314 | done |
109 | |
315 | |
110 | set +f |
316 | # In case we filtered out all optimization flags fallback to -O2 |
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317 | if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then |
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318 | NEW_CFLAGS="${NEW_CFLAGS} -O2" |
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319 | fi |
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320 | if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then |
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321 | NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" |
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322 | fi |
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323 | |
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324 | set +f # re-enable pathname expansion |
111 | |
325 | |
112 | export CFLAGS="${NEW_CFLAGS}" |
326 | export CFLAGS="${NEW_CFLAGS}" |
113 | export CXXFLAGS="${NEW_CXXFLAGS}" |
327 | export CXXFLAGS="${NEW_CXXFLAGS}" |
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328 | return 0 |
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329 | } |
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330 | |
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331 | test-flag-PROG() { |
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332 | local comp=$1 |
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333 | local flags="$2" |
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334 | |
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335 | [[ -z ${comp} || -z ${flags} ]] && \ |
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336 | return 1 |
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337 | |
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338 | local PROG=$(tc-get${comp}) |
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339 | ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ |
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340 | > /dev/null 2>&1 |
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341 | } |
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342 | |
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343 | # Returns true if C compiler support given flag |
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344 | test-flag-CC() { test-flag-PROG "CC" "$1"; } |
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345 | |
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346 | # Returns true if C++ compiler support given flag |
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347 | test-flag-CXX() { test-flag-PROG "CXX" "$1"; } |
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348 | |
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349 | test-flags-PROG() { |
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350 | local comp=$1 |
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351 | local flags |
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352 | local x |
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353 | |
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354 | shift |
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355 | |
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356 | [[ -z ${comp} ]] && return 1 |
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357 | |
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358 | x="" |
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359 | for x in "$@" ; do |
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360 | test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" |
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361 | done |
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362 | |
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363 | echo "${flags}" |
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364 | |
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365 | # Just bail if we dont have any flags |
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366 | [[ -n ${flags} ]] |
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367 | } |
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368 | |
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369 | # Returns (echo's) the given flags supported by the C compiler |
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370 | test-flags-CC() { test-flags-PROG "CC" "$@"; } |
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371 | |
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372 | # Returns (echo's) the given flags supported by the C++ compiler |
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373 | test-flags-CXX() { test-flags-PROG "CXX" "$@"; } |
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374 | |
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375 | # Short-hand that should hopefully work for both C and C++ compiler, but |
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376 | # its really only present due to the append-flags() abomination. |
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377 | test-flags() { test-flags-CC "$@"; } |
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378 | |
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379 | # Depriciated, use test-flags() |
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380 | test_flag() { |
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381 | ewarn "test_flag: deprecated, please use test-flags()!" >&2 |
|
|
382 | |
|
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383 | test-flags-CC "$@" |
|
|
384 | } |
|
|
385 | |
|
|
386 | test_version_info() { |
|
|
387 | if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then |
|
|
388 | return 0 |
|
|
389 | else |
|
|
390 | return 1 |
|
|
391 | fi |
|
|
392 | } |
|
|
393 | |
|
|
394 | strip-unsupported-flags() { |
|
|
395 | export CFLAGS=$(test-flags-CC ${CFLAGS}) |
|
|
396 | export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) |
114 | } |
397 | } |
115 | |
398 | |
116 | get-flag() { |
399 | get-flag() { |
117 | local findflag="$1" |
400 | local f findflag="$1" |
118 | |
401 | |
|
|
402 | # this code looks a little flaky but seems to work for |
|
|
403 | # everything we want ... |
|
|
404 | # for example, if CFLAGS="-march=i686": |
|
|
405 | # `get-flag -march` == "-march=i686" |
|
|
406 | # `get-flag march` == "i686" |
119 | for f in ${CFLAGS} ${CXXFLAGS} ; do |
407 | for f in ${CFLAGS} ${CXXFLAGS} ; do |
120 | if [ "${f/${findflag}}" != "${f}" ] ; then |
408 | if [ "${f/${findflag}}" != "${f}" ] ; then |
121 | echo "${f/-${findflag}=}" |
409 | printf "%s\n" "${f/-${findflag}=}" |
122 | return |
410 | return 0 |
123 | fi |
411 | fi |
124 | done |
412 | done |
|
|
413 | return 1 |
125 | } |
414 | } |
|
|
415 | |
|
|
416 | # DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs |
|
|
417 | has_hardened() { |
|
|
418 | ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 |
|
|
419 | |
|
|
420 | test_version_info Hardened && return 0 |
|
|
421 | # The specs file wont exist unless gcc has GCC_SPECS support |
|
|
422 | [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] |
|
|
423 | } |
|
|
424 | |
|
|
425 | # DEPRECATED - use gcc-specs-pie from toolchain-funcs |
|
|
426 | # indicate whether PIC is set |
|
|
427 | has_pic() { |
|
|
428 | ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 |
|
|
429 | |
|
|
430 | [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ |
|
|
431 | ${CFLAGS/-fpic} != ${CFLAGS} ]] || \ |
|
|
432 | gcc-specs-pie |
|
|
433 | } |
|
|
434 | |
|
|
435 | # DEPRECATED - use gcc-specs-pie from toolchain-funcs |
|
|
436 | # indicate whether PIE is set |
|
|
437 | has_pie() { |
|
|
438 | ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 |
|
|
439 | |
|
|
440 | [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ |
|
|
441 | ${CFLAGS/-fpie} != ${CFLAGS} ]] || \ |
|
|
442 | gcc-specs-pie |
|
|
443 | } |
|
|
444 | |
|
|
445 | # DEPRECATED - use gcc-specs-ssp from toolchain-funcs |
|
|
446 | # indicate whether code for SSP is being generated for all functions |
|
|
447 | has_ssp_all() { |
|
|
448 | ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 |
|
|
449 | |
|
|
450 | # note; this matches only -fstack-protector-all |
|
|
451 | [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ |
|
|
452 | -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ |
|
|
453 | gcc-specs-ssp-all |
|
|
454 | } |
|
|
455 | |
|
|
456 | # DEPRECATED - use gcc-specs-ssp from toolchain-funcs |
|
|
457 | # indicate whether code for SSP is being generated |
|
|
458 | has_ssp() { |
|
|
459 | ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 |
|
|
460 | |
|
|
461 | # note; this matches both -fstack-protector and -fstack-protector-all |
|
|
462 | [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ |
|
|
463 | -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ |
|
|
464 | gcc-specs-ssp |
|
|
465 | } |
|
|
466 | |
|
|
467 | has_m64() { |
|
|
468 | # this doesnt test if the flag is accepted, it tests if the flag |
|
|
469 | # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! |
|
|
470 | # please dont replace this function with test_flag in some future |
|
|
471 | # clean-up! |
|
|
472 | |
|
|
473 | local temp="$(emktemp)" |
|
|
474 | echo "int main() { return(0); }" > "${temp}".c |
|
|
475 | MY_CC=$(tc-getCC) |
|
|
476 | ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 |
|
|
477 | local ret=$? |
|
|
478 | rm -f "${temp}".c |
|
|
479 | [[ ${ret} != 1 ]] && return 0 |
|
|
480 | return 1 |
|
|
481 | } |
|
|
482 | |
|
|
483 | has_m32() { |
|
|
484 | # this doesnt test if the flag is accepted, it tests if the flag |
|
|
485 | # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! |
|
|
486 | # please dont replace this function with test_flag in some future |
|
|
487 | # clean-up! |
|
|
488 | |
|
|
489 | [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0 |
|
|
490 | |
|
|
491 | local temp=$(emktemp) |
|
|
492 | echo "int main() { return(0); }" > "${temp}".c |
|
|
493 | MY_CC=$(tc-getCC) |
|
|
494 | ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 |
|
|
495 | local ret=$? |
|
|
496 | rm -f "${temp}".c |
|
|
497 | [[ ${ret} != 1 ]] && return 0 |
|
|
498 | return 1 |
|
|
499 | } |
|
|
500 | |
|
|
501 | replace-sparc64-flags() { |
|
|
502 | local SPARC64_CPUS="ultrasparc3 ultrasparc v9" |
|
|
503 | |
|
|
504 | if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then |
|
|
505 | for x in ${SPARC64_CPUS}; do |
|
|
506 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" |
|
|
507 | done |
|
|
508 | else |
|
|
509 | for x in ${SPARC64_CPUS}; do |
|
|
510 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
|
|
511 | done |
|
|
512 | fi |
|
|
513 | |
|
|
514 | if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then |
|
|
515 | for x in ${SPARC64_CPUS}; do |
|
|
516 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" |
|
|
517 | done |
|
|
518 | else |
|
|
519 | for x in ${SPARC64_CPUS}; do |
|
|
520 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
|
|
521 | done |
|
|
522 | fi |
|
|
523 | |
|
|
524 | export CFLAGS CXXFLAGS |
|
|
525 | } |
|
|
526 | |
|
|
527 | append-ldflags() { |
|
|
528 | [[ -z $* ]] && return 0 |
|
|
529 | export LDFLAGS="${LDFLAGS} $*" |
|
|
530 | return 0 |
|
|
531 | } |
|
|
532 | |
|
|
533 | # Remove flags from LDFLAGS - it's up to the ebuild to filter |
|
|
534 | # CFLAGS and CXXFLAGS via filter-flags if they need to. |
|
|
535 | filter-ldflags() { |
|
|
536 | _filter-var LDFLAGS "$@" |
|
|
537 | return 0 |
|
|
538 | } |
|
|
539 | |
|
|
540 | # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results |
|
|
541 | # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed |
|
|
542 | # to gcc where it needs the '-Wl,'. |
|
|
543 | raw-ldflags() { |
|
|
544 | local x input="$@" |
|
|
545 | [[ -z ${input} ]] && input=${LDFLAGS} |
|
|
546 | set -- |
|
|
547 | for x in ${input} ; do |
|
|
548 | x=${x#-Wl,} |
|
|
549 | set -- "$@" ${x//,/ } |
|
|
550 | done |
|
|
551 | echo "$@" |
|
|
552 | } |
|
|
553 | |
|
|
554 | # Gets the flags needed for "NOW" binding |
|
|
555 | bindnow-flags() { |
|
|
556 | case $($(tc-getLD) -v 2>&1 </dev/null) in |
|
|
557 | *GNU* | *'with BFD'*) # GNU ld |
|
|
558 | echo "-Wl,-z,now" ;; |
|
|
559 | *Apple*) # Darwin ld |
|
|
560 | echo "-bind_at_load" ;; |
|
|
561 | *) |
|
|
562 | # Some linkers just recognize -V instead of -v |
|
|
563 | case $($(tc-getLD) -V 2>&1 </dev/null) in |
|
|
564 | *Solaris*) # Solaris accept almost the same GNU options |
|
|
565 | echo "-Wl,-z,now" ;; |
|
|
566 | esac |
|
|
567 | ;; |
|
|
568 | esac |
|
|
569 | } |
|
|
570 | |
|
|
571 | |
|
|
572 | # Some tests for when we screw with things and want to make |
|
|
573 | # sure we didn't break anything |
|
|
574 | #TESTS() { |
|
|
575 | # CFLAGS="-a -b -c=1" |
|
|
576 | # CXXFLAGS="-x -y -z=2" |
|
|
577 | # LDFLAGS="-l -m -n=3" |
|
|
578 | # |
|
|
579 | # die() { exit 1; } |
|
|
580 | # (is-flag 1 2 3) && die |
|
|
581 | # (is-ldflag 1 2 3) && die |
|
|
582 | # |
|
|
583 | # is-flagq -l && die |
|
|
584 | # is-ldflagq -a && die |
|
|
585 | # is-flagq -a || die |
|
|
586 | # is-flagq -x || die |
|
|
587 | # is-ldflagq -n=* || die |
|
|
588 | # is-ldflagq -n && die |
|
|
589 | # |
|
|
590 | # strip-unsupported-flags |
|
|
591 | # [[ ${CFLAGS} == "-c=1" ]] || die |
|
|
592 | # [[ ${CXXFLAGS} == "-y -z=2" ]] || die |
|
|
593 | # |
|
|
594 | # echo "All tests pass" |
|
|
595 | #} |
|
|
596 | #TESTS |