1 | # Copyright 1999-2002 Gentoo Technologies, Inc. |
1 | # Copyright 1999-2008 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 | # Author Bart Verwilst <verwilst@gentoo.org> |
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4 | # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.11 2002/12/22 12:11:56 cretin Exp $ |
3 | # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.124 2008/07/03 05:30:54 dberkholz Exp $ |
5 | |
4 | |
6 | ECLASS=flag-o-matic |
5 | # @ECLASS: flag-o-matic.eclass |
7 | INHERITED="$INHERITED $ECLASS" |
6 | # @MAINTAINER: |
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7 | # toolchain@gentoo.org |
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8 | # @BLURB: common functions to manipulate and query toolchain flags |
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9 | # @DESCRIPTION: |
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10 | # This eclass contains a suite of functions to help developers sanely |
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11 | # and safely manage toolchain flags in their builds. |
8 | |
12 | |
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13 | inherit eutils toolchain-funcs multilib |
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14 | |
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15 | ################ DEPRECATED functions ################ |
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16 | # The following are still present to avoid breaking existing |
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17 | # code more than necessary; however they are deprecated. Please |
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18 | # use gcc-specs-* from toolchain-funcs.eclass instead, if you |
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19 | # need to know which hardened techs are active in the compiler. |
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20 | # See bug #100974 |
9 | # |
21 | # |
10 | #### filter-flags <flag> #### |
22 | # has_hardened |
11 | # Remove particular flags from C[XX]FLAGS |
23 | # has_pie |
12 | # |
24 | # has_pic |
13 | #### append-flags <flag> #### |
25 | # has_ssp_all |
14 | # Add extra flags to your current C[XX]FLAGS |
26 | # has_ssp |
15 | # |
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16 | #### replace-flags <orig.flag> <new.flag> ### |
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17 | # Replace a flag by another one |
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18 | # |
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19 | #### is-flag <flag> #### |
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20 | # Returns "true" if flag is set in C[XX]FLAGS |
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21 | # Matches only complete flag |
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22 | # |
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23 | #### strip-flags #### |
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24 | # Strip C[XX]FLAGS of everything except known |
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25 | # good options. |
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26 | # |
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27 | #### get-flag <flag> #### |
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28 | # Find and echo the value for a particular flag |
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29 | # |
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30 | |
27 | |
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28 | |
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29 | # {C,CXX,F,FC}FLAGS that we allow in strip-flags |
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30 | # Note: shell globs and character lists are allowed |
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31 | setup-allowed-flags() { |
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32 | if [[ -z ${ALLOWED_FLAGS} ]] ; then |
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33 | export ALLOWED_FLAGS="-pipe" |
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34 | export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" |
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35 | export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" |
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36 | export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking" |
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37 | export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" |
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38 | export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+" |
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39 | export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" |
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40 | export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w" |
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41 | fi |
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42 | # allow a bunch of flags that negate features / control ABI |
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43 | ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \ |
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44 | -fno-strict-aliasing -fno-bounds-checking" |
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45 | ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ |
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46 | -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ |
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47 | -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ |
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48 | -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ |
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49 | -mieee -mieee-with-inexact -mschedule \ |
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50 | -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ |
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51 | -mflat -mno-flat -mno-faster-structs -mfaster-structs \ |
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52 | -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ |
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53 | -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ |
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54 | -msecure-plt -D*" |
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55 | |
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56 | # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing |
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57 | # NOTE: currently -Os have issues with gcc3 and K6* arch's |
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58 | export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" |
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59 | return 0 |
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60 | } |
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61 | |
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62 | # inverted filters for hardened compiler. This is trying to unpick |
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63 | # the hardened compiler defaults. |
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64 | _filter-hardened() { |
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65 | local f |
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66 | for f in "$@" ; do |
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67 | case "${f}" in |
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68 | # Ideally we should only concern ourselves with PIE flags, |
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69 | # not -fPIC or -fpic, but too many places filter -fPIC without |
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70 | # thinking about -fPIE. |
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71 | -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) |
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72 | gcc-specs-pie || continue |
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73 | is-flagq -nopie || append-flags -nopie;; |
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74 | -fstack-protector) |
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75 | gcc-specs-ssp || continue |
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76 | is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; |
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77 | -fstack-protector-all) |
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78 | gcc-specs-ssp-to-all || continue |
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79 | is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; |
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80 | esac |
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81 | done |
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82 | } |
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83 | |
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84 | # Remove occurrences of strings from variable given in $1 |
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85 | # Strings removed are matched as globs, so for example |
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86 | # '-O*' would remove -O1, -O2 etc. |
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87 | _filter-var() { |
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88 | local f x VAR VAL |
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89 | declare -a new |
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90 | |
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91 | VAR=$1 |
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92 | shift |
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93 | eval VAL=\${${VAR}} |
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94 | for f in ${VAL}; do |
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95 | for x in "$@"; do |
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96 | # Note this should work with globs like -O* |
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97 | [[ ${f} == ${x} ]] && continue 2 |
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98 | done |
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99 | eval new\[\${\#new\[@]}]=\${f} |
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100 | done |
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101 | eval export ${VAR}=\${new\[*]} |
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102 | } |
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103 | |
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104 | # @FUNCTION: filter-flags |
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105 | # @USAGE: <flags> |
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106 | # @DESCRIPTION: |
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107 | # Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs. |
31 | filter-flags () { |
108 | filter-flags() { |
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109 | _filter-hardened "$@" |
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110 | _filter-var CFLAGS "$@" |
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111 | _filter-var CPPFLAGS "$@" |
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112 | _filter-var CXXFLAGS "$@" |
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113 | _filter-var FFLAGS "$@" |
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114 | _filter-var FCFLAGS "$@" |
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115 | return 0 |
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116 | } |
32 | |
117 | |
33 | for x in $1 |
118 | # @FUNCTION: filter-lfs-flags |
34 | do |
119 | # @DESCRIPTION: |
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120 | # Remove flags that enable Large File Support. |
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121 | filter-lfs-flags() { |
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122 | [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" |
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123 | filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
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124 | } |
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125 | |
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126 | # @FUNCTION: append-cppflags |
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127 | # @USAGE: <flags> |
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128 | # @DESCRIPTION: |
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129 | # Add extra <flags> to the current CPPFLAGS. |
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130 | append-cppflags() { |
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131 | [[ -z $* ]] && return 0 |
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132 | export CPPFLAGS="${CPPFLAGS} $*" |
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133 | return 0 |
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134 | } |
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135 | |
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136 | # @FUNCTION: append-fflags |
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137 | # @USAGE: <flags> |
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138 | # @DESCRIPTION: |
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139 | # Add extra <flags> to the current {F,FC}FLAGS. |
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140 | append-fflags() { |
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141 | [[ -z $* ]] && return 0 |
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142 | export FFLAGS="${FFLAGS} $*" |
35 | export CFLAGS="${CFLAGS/${x}}" |
143 | export FCFLAGS="${FCFLAGS} $*" |
36 | export CXXFLAGS="${CXXFLAGS/${x}}" |
144 | return 0 |
37 | done |
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38 | |
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39 | } |
145 | } |
40 | |
146 | |
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147 | # @FUNCTION: append-lfs-flags |
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148 | # @DESCRIPTION: |
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149 | # Add flags that enable Large File Support. |
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150 | append-lfs-flags() { |
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151 | [[ -n $@ ]] && die "append-lfs-flags takes no arguments" |
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152 | append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
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153 | } |
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154 | |
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155 | # @FUNCTION: append-flags |
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156 | # @USAGE: <flags> |
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157 | # @DESCRIPTION: |
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158 | # Add extra <flags> to your current {C,CXX,F,FC}FLAGS. |
41 | append-flags () { |
159 | append-flags() { |
42 | |
160 | [[ -z $* ]] && return 0 |
43 | CFLAGS="${CFLAGS} $1" |
161 | export CFLAGS="${CFLAGS} $*" |
44 | CXXFLAGS="${CXXFLAGS} $1" |
162 | export CXXFLAGS="${CXXFLAGS} $*" |
45 | |
163 | export FFLAGS="${FFLAGS} $*" |
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164 | export FCFLAGS="${FCFLAGS} $*" |
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165 | return 0 |
46 | } |
166 | } |
47 | |
167 | |
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168 | # @FUNCTION: replace-flags |
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169 | # @USAGE: <old> <new> |
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170 | # @DESCRIPTION: |
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171 | # Replace the <old> flag with <new>. Accepts shell globs for <old>. |
48 | replace-flags () { |
172 | replace-flags() { |
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173 | [[ $# != 2 ]] \ |
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174 | && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ |
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175 | && die "replace-flags takes 2 arguments, not $#" |
49 | |
176 | |
50 | CFLAGS="${CFLAGS/${1}/${2} }" |
177 | local f fset |
51 | CXXFLAGS="${CXXFLAGS/${1}/${2} }" |
178 | declare -a new_CFLAGS new_CXXFLAGS |
52 | |
179 | |
53 | } |
180 | for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do |
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181 | # Looping over the flags instead of using a global |
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182 | # substitution ensures that we're working with flag atoms. |
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183 | # Otherwise globs like -O* have the potential to wipe out the |
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184 | # list of flags. |
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185 | for f in ${!fset}; do |
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186 | # Note this should work with globs like -O* |
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187 | [[ ${f} == ${1} ]] && f=${2} |
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188 | eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} |
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189 | done |
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190 | eval export ${fset}=\${new_${fset}\[*]} |
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191 | done |
54 | |
192 | |
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193 | return 0 |
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194 | } |
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195 | |
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196 | # @FUNCTION: replace-cpu-flags |
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197 | # @USAGE: <old> <new> |
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198 | # @DESCRIPTION: |
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199 | # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu |
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200 | # with flags that select the <new> cpu. Accepts shell globs for <old>. |
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201 | replace-cpu-flags() { |
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202 | local newcpu="$#" ; newcpu="${!newcpu}" |
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203 | while [ $# -gt 1 ] ; do |
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204 | # quote to make sure that no globbing is done (particularly on |
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205 | # ${oldcpu}) prior to calling replace-flags |
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206 | replace-flags "-march=${1}" "-march=${newcpu}" |
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207 | replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" |
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208 | replace-flags "-mtune=${1}" "-mtune=${newcpu}" |
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209 | shift |
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210 | done |
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211 | return 0 |
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212 | } |
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213 | |
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214 | _is_flagq() { |
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215 | local x |
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216 | for x in ${!1} ; do |
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217 | [[ ${x} == $2 ]] && return 0 |
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218 | done |
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219 | return 1 |
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220 | } |
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221 | |
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222 | # @FUNCTION: is-flagq |
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223 | # @USAGE: <flag> |
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224 | # @DESCRIPTION: |
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225 | # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs. |
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226 | is-flagq() { |
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227 | [[ -n $2 ]] && die "Usage: is-flag <flag>" |
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228 | _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1 |
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229 | } |
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230 | |
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231 | # @FUNCTION: is-flag |
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232 | # @USAGE: <flag> |
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233 | # @DESCRIPTION: |
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234 | # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs. |
55 | is-flag() { |
235 | is-flag() { |
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236 | is-flagq "$@" && echo true |
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237 | } |
56 | |
238 | |
57 | for x in ${CFLAGS} ${CXXFLAGS} |
239 | # @FUNCTION: is-ldflagq |
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240 | # @USAGE: <flag> |
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241 | # @DESCRIPTION: |
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242 | # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs. |
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243 | is-ldflagq() { |
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244 | [[ -n $2 ]] && die "Usage: is-ldflag <flag>" |
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245 | _is_flagq LDFLAGS $1 |
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246 | } |
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247 | |
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248 | # @FUNCTION: is-ldflag |
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249 | # @USAGE: <flag> |
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250 | # @DESCRIPTION: |
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251 | # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs. |
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252 | is-ldflag() { |
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253 | is-ldflagq "$@" && echo true |
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254 | } |
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255 | |
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256 | # @FUNCTION: filter-mfpmath |
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257 | # @USAGE: <math types> |
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258 | # @DESCRIPTION: |
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259 | # Remove specified math types from the fpmath flag. For example, if the user |
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260 | # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with |
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261 | # -mfpmath=386. |
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262 | filter-mfpmath() { |
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263 | local orig_mfpmath new_math prune_math |
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264 | |
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265 | # save the original -mfpmath flag |
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266 | orig_mfpmath=$(get-flag -mfpmath) |
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267 | # get the value of the current -mfpmath flag |
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268 | new_math=$(get-flag mfpmath) |
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269 | new_math=" ${new_math//,/ } " |
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270 | # figure out which math values are to be removed |
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271 | prune_math="" |
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272 | for prune_math in "$@" ; do |
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273 | new_math=${new_math/ ${prune_math} / } |
58 | do |
274 | done |
59 | if [ "${x}" = "$1" ] |
275 | new_math=$(echo ${new_math}) |
60 | then |
276 | new_math=${new_math// /,} |
61 | echo true |
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62 | break |
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63 | fi |
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64 | done |
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65 | |
277 | |
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278 | if [[ -z ${new_math} ]] ; then |
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279 | # if we're removing all user specified math values are |
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280 | # slated for removal, then we just filter the flag |
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281 | filter-flags ${orig_mfpmath} |
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282 | else |
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283 | # if we only want to filter some of the user specified |
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284 | # math values, then we replace the current flag |
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285 | replace-flags ${orig_mfpmath} -mfpmath=${new_math} |
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286 | fi |
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287 | return 0 |
66 | } |
288 | } |
67 | |
289 | |
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290 | # @FUNCTION: strip-flags |
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291 | # @DESCRIPTION: |
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292 | # Strip C[XX]FLAGS of everything except known good/safe flags. |
68 | strip-flags() { |
293 | strip-flags() { |
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294 | local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS |
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295 | |
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296 | setup-allowed-flags |
69 | |
297 | |
70 | local NEW_CFLAGS="" |
298 | local NEW_CFLAGS="" |
71 | local NEW_CXXFLAGS="" |
299 | local NEW_CXXFLAGS="" |
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300 | local NEW_FFLAGS="" |
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301 | local NEW_FCFLAGS="" |
72 | |
302 | |
73 | local ALLOWED_FLAGS="-O -mcpu -march -pipe -g" |
303 | # Allow unstable C[XX]FLAGS if we are using unstable profile ... |
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304 | if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then |
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305 | ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" |
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306 | fi |
74 | |
307 | |
75 | set -f |
308 | set -f # disable pathname expansion |
76 | |
309 | |
77 | for x in ${CFLAGS} |
310 | for x in ${CFLAGS}; do |
78 | do |
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79 | for y in ${ALLOWED_FLAGS} |
311 | for y in ${ALLOWED_FLAGS}; do |
80 | do |
312 | flag=${x%%=*} |
81 | if [ "${x/${y}}" != "${x}" ] |
313 | if [ "${flag%%${y}}" = "" ] ; then |
82 | then |
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83 | if [ -z "${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} ${x}" |
314 | NEW_CFLAGS="${NEW_CFLAGS} ${x}" |
88 | fi |
315 | break |
89 | fi |
316 | fi |
90 | done |
317 | done |
91 | done |
318 | done |
92 | |
319 | |
93 | for x in ${CXXFLAGS} |
320 | for x in ${CXXFLAGS}; do |
94 | do |
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95 | for y in ${ALLOWED_FLAGS} |
321 | for y in ${ALLOWED_FLAGS}; do |
96 | do |
322 | flag=${x%%=*} |
97 | if [ "${x/${y}}" != "${x}" ] |
323 | if [ "${flag%%${y}}" = "" ] ; then |
98 | then |
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99 | if [ -z "${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} ${x}" |
324 | NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" |
104 | fi |
325 | break |
105 | fi |
326 | fi |
106 | done |
327 | done |
107 | done |
328 | done |
108 | |
329 | |
109 | set +f |
330 | for x in ${FFLAGS}; do |
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331 | for y in ${ALLOWED_FLAGS}; do |
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332 | flag=${x%%=*} |
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333 | if [ "${flag%%${y}}" = "" ] ; then |
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334 | NEW_FFLAGS="${NEW_FFLAGS} ${x}" |
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335 | break |
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336 | fi |
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337 | done |
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338 | done |
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339 | |
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340 | for x in ${FCFLAGS}; do |
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341 | for y in ${ALLOWED_FLAGS}; do |
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342 | flag=${x%%=*} |
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343 | if [ "${flag%%${y}}" = "" ] ; then |
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344 | NEW_FCFLAGS="${NEW_FCFLAGS} ${x}" |
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345 | break |
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346 | fi |
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347 | done |
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348 | done |
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349 | |
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350 | # In case we filtered out all optimization flags fallback to -O2 |
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351 | if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then |
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352 | NEW_CFLAGS="${NEW_CFLAGS} -O2" |
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353 | fi |
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354 | if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then |
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355 | NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" |
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356 | fi |
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357 | if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then |
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358 | NEW_FFLAGS="${NEW_FFLAGS} -O2" |
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359 | fi |
|
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360 | if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then |
|
|
361 | NEW_FCFLAGS="${NEW_FCFLAGS} -O2" |
|
|
362 | fi |
|
|
363 | |
|
|
364 | set +f # re-enable pathname expansion |
110 | |
365 | |
111 | export CFLAGS="${NEW_CFLAGS}" |
366 | export CFLAGS="${NEW_CFLAGS}" |
112 | export CXXFLAGS="${NEW_CXXFLAGS}" |
367 | export CXXFLAGS="${NEW_CXXFLAGS}" |
|
|
368 | export FFLAGS="${NEW_FFLAGS}" |
|
|
369 | export FCFLAGS="${NEW_FCFLAGS}" |
|
|
370 | return 0 |
113 | } |
371 | } |
114 | |
372 | |
|
|
373 | test-flag-PROG() { |
|
|
374 | local comp=$1 |
|
|
375 | local flags="$2" |
|
|
376 | |
|
|
377 | [[ -z ${comp} || -z ${flags} ]] && \ |
|
|
378 | return 1 |
|
|
379 | |
|
|
380 | local PROG=$(tc-get${comp}) |
|
|
381 | ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ |
|
|
382 | > /dev/null 2>&1 |
|
|
383 | } |
|
|
384 | |
|
|
385 | # @FUNCTION: test-flag-CC |
|
|
386 | # @USAGE: <flag> |
|
|
387 | # @DESCRIPTION: |
|
|
388 | # Returns shell true if <flag> is supported by the C compiler, else returns shell false. |
|
|
389 | test-flag-CC() { test-flag-PROG "CC" "$1"; } |
|
|
390 | |
|
|
391 | # @FUNCTION: test-flag-CXX |
|
|
392 | # @USAGE: <flag> |
|
|
393 | # @DESCRIPTION: |
|
|
394 | # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false. |
|
|
395 | test-flag-CXX() { test-flag-PROG "CXX" "$1"; } |
|
|
396 | |
|
|
397 | # @FUNCTION: test-flag-F77 |
|
|
398 | # @USAGE: <flag> |
|
|
399 | # @DESCRIPTION: |
|
|
400 | # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false. |
|
|
401 | test-flag-F77() { test-flag-PROG "F77" "$1"; } |
|
|
402 | |
|
|
403 | # @FUNCTION: test-flag-FC |
|
|
404 | # @USAGE: <flag> |
|
|
405 | # @DESCRIPTION: |
|
|
406 | # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false. |
|
|
407 | test-flag-FC() { test-flag-PROG "FC" "$1"; } |
|
|
408 | |
|
|
409 | test-flags-PROG() { |
|
|
410 | local comp=$1 |
|
|
411 | local flags |
|
|
412 | local x |
|
|
413 | |
|
|
414 | shift |
|
|
415 | |
|
|
416 | [[ -z ${comp} ]] && return 1 |
|
|
417 | |
|
|
418 | x="" |
|
|
419 | for x in "$@" ; do |
|
|
420 | test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" |
|
|
421 | done |
|
|
422 | |
|
|
423 | echo "${flags}" |
|
|
424 | |
|
|
425 | # Just bail if we dont have any flags |
|
|
426 | [[ -n ${flags} ]] |
|
|
427 | } |
|
|
428 | |
|
|
429 | # @FUNCTION: test-flags-CC |
|
|
430 | # @USAGE: <flags> |
|
|
431 | # @DESCRIPTION: |
|
|
432 | # Returns shell true if <flags> are supported by the C compiler, else returns shell false. |
|
|
433 | test-flags-CC() { test-flags-PROG "CC" "$@"; } |
|
|
434 | |
|
|
435 | # @FUNCTION: test-flags-CXX |
|
|
436 | # @USAGE: <flags> |
|
|
437 | # @DESCRIPTION: |
|
|
438 | # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false. |
|
|
439 | test-flags-CXX() { test-flags-PROG "CXX" "$@"; } |
|
|
440 | |
|
|
441 | # @FUNCTION: test-flags-F77 |
|
|
442 | # @USAGE: <flags> |
|
|
443 | # @DESCRIPTION: |
|
|
444 | # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false. |
|
|
445 | test-flags-F77() { test-flags-PROG "F77" "$@"; } |
|
|
446 | |
|
|
447 | # @FUNCTION: test-flags-FC |
|
|
448 | # @USAGE: <flags> |
|
|
449 | # @DESCRIPTION: |
|
|
450 | # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false. |
|
|
451 | test-flags-FC() { test-flags-PROG "FC" "$@"; } |
|
|
452 | |
|
|
453 | # @FUNCTION: test-flags |
|
|
454 | # @USAGE: <flags> |
|
|
455 | # @DESCRIPTION: |
|
|
456 | # Short-hand that should hopefully work for both C and C++ compiler, but |
|
|
457 | # its really only present due to the append-flags() abomination. |
|
|
458 | test-flags() { test-flags-CC "$@"; } |
|
|
459 | |
|
|
460 | # @FUNCTION: test_flag |
|
|
461 | # @DESCRIPTION: |
|
|
462 | # DEPRICIATED, use test-flags() |
|
|
463 | test_flag() { |
|
|
464 | ewarn "test_flag: deprecated, please use test-flags()!" >&2 |
|
|
465 | |
|
|
466 | test-flags-CC "$@" |
|
|
467 | } |
|
|
468 | |
|
|
469 | # @FUNCTION: test_version_info |
|
|
470 | # @USAGE: <version> |
|
|
471 | # @DESCRIPTION: |
|
|
472 | # Returns shell true if the current C compiler version matches <version>, else returns shell false. |
|
|
473 | # Accepts shell globs. |
|
|
474 | test_version_info() { |
|
|
475 | if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then |
|
|
476 | return 0 |
|
|
477 | else |
|
|
478 | return 1 |
|
|
479 | fi |
|
|
480 | } |
|
|
481 | |
|
|
482 | # @FUNCTION: strip-unsupported-flags |
|
|
483 | # @DESCRIPTION: |
|
|
484 | # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain. |
|
|
485 | strip-unsupported-flags() { |
|
|
486 | export CFLAGS=$(test-flags-CC ${CFLAGS}) |
|
|
487 | export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) |
|
|
488 | export FFLAGS=$(test-flags-F77 ${FFLAGS}) |
|
|
489 | export FCFLAGS=$(test-flags-FC ${FCFLAGS}) |
|
|
490 | } |
|
|
491 | |
|
|
492 | # @FUNCTION: get-flag |
|
|
493 | # @USAGE: <flag> |
|
|
494 | # @DESCRIPTION: |
|
|
495 | # Find and echo the value for a particular flag. Accepts shell globs. |
115 | get-flag() { |
496 | get-flag() { |
116 | local findflag="$1" |
497 | local f findflag="$1" |
117 | |
498 | |
|
|
499 | # this code looks a little flaky but seems to work for |
|
|
500 | # everything we want ... |
|
|
501 | # for example, if CFLAGS="-march=i686": |
|
|
502 | # `get-flag -march` == "-march=i686" |
|
|
503 | # `get-flag march` == "i686" |
118 | for f in ${CFLAGS} ${CXXFLAGS} ; do |
504 | for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do |
119 | if [ "${f/${findflag}}" != "${f}" ] ; then |
505 | if [ "${f/${findflag}}" != "${f}" ] ; then |
120 | echo "${f/-${findflag}=}" |
506 | printf "%s\n" "${f/-${findflag}=}" |
121 | return |
507 | return 0 |
122 | fi |
508 | fi |
123 | done |
509 | done |
|
|
510 | return 1 |
124 | } |
511 | } |
|
|
512 | |
|
|
513 | # @FUNCTION: has_hardened |
|
|
514 | # @DESCRIPTION: |
|
|
515 | # DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs |
|
|
516 | has_hardened() { |
|
|
517 | ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 |
|
|
518 | |
|
|
519 | test_version_info Hardened && return 0 |
|
|
520 | # The specs file wont exist unless gcc has GCC_SPECS support |
|
|
521 | [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] |
|
|
522 | } |
|
|
523 | |
|
|
524 | # @FUNCTION: has_pic |
|
|
525 | # @DESCRIPTION: |
|
|
526 | # DEPRECATED - use gcc-specs-pie from toolchain-funcs |
|
|
527 | # indicate whether PIC is set |
|
|
528 | has_pic() { |
|
|
529 | ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 |
|
|
530 | |
|
|
531 | [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ |
|
|
532 | ${CFLAGS/-fpic} != ${CFLAGS} ]] || \ |
|
|
533 | gcc-specs-pie |
|
|
534 | } |
|
|
535 | |
|
|
536 | # @FUNCTION: has_pie |
|
|
537 | # @DESCRIPTION: |
|
|
538 | # DEPRECATED - use gcc-specs-pie from toolchain-funcs |
|
|
539 | # indicate whether PIE is set |
|
|
540 | has_pie() { |
|
|
541 | ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 |
|
|
542 | |
|
|
543 | [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ |
|
|
544 | ${CFLAGS/-fpie} != ${CFLAGS} ]] || \ |
|
|
545 | gcc-specs-pie |
|
|
546 | } |
|
|
547 | |
|
|
548 | # @FUNCTION: has_ssp_all |
|
|
549 | # @DESCRIPTION: |
|
|
550 | # DEPRECATED - use gcc-specs-ssp from toolchain-funcs |
|
|
551 | # indicate whether code for SSP is being generated for all functions |
|
|
552 | has_ssp_all() { |
|
|
553 | ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 |
|
|
554 | |
|
|
555 | # note; this matches only -fstack-protector-all |
|
|
556 | [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ |
|
|
557 | -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ |
|
|
558 | gcc-specs-ssp-all |
|
|
559 | } |
|
|
560 | |
|
|
561 | # @FUNCTION: has_ssp |
|
|
562 | # @DESCRIPTION: |
|
|
563 | # DEPRECATED - use gcc-specs-ssp from toolchain-funcs |
|
|
564 | # indicate whether code for SSP is being generated |
|
|
565 | has_ssp() { |
|
|
566 | ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 |
|
|
567 | |
|
|
568 | # note; this matches both -fstack-protector and -fstack-protector-all |
|
|
569 | [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ |
|
|
570 | -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ |
|
|
571 | gcc-specs-ssp |
|
|
572 | } |
|
|
573 | |
|
|
574 | # @FUNCTION: has_m64 |
|
|
575 | # @DESCRIPTION: |
|
|
576 | # This doesn't test if the flag is accepted, it tests if the flag actually |
|
|
577 | # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works |
|
|
578 | # return code is 0, else the return code is 1. |
|
|
579 | has_m64() { |
|
|
580 | # this doesnt test if the flag is accepted, it tests if the flag |
|
|
581 | # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! |
|
|
582 | # please dont replace this function with test_flag in some future |
|
|
583 | # clean-up! |
|
|
584 | |
|
|
585 | local temp="$(emktemp)" |
|
|
586 | echo "int main() { return(0); }" > "${temp}".c |
|
|
587 | MY_CC=$(tc-getCC) |
|
|
588 | ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 |
|
|
589 | local ret=$? |
|
|
590 | rm -f "${temp}".c |
|
|
591 | [[ ${ret} != 1 ]] && return 0 |
|
|
592 | return 1 |
|
|
593 | } |
|
|
594 | |
|
|
595 | # @FUNCTION: has_m32 |
|
|
596 | # @DESCRIPTION: |
|
|
597 | # This doesn't test if the flag is accepted, it tests if the flag actually |
|
|
598 | # WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return |
|
|
599 | # code is 0, else return code is 1. |
|
|
600 | has_m32() { |
|
|
601 | # this doesnt test if the flag is accepted, it tests if the flag |
|
|
602 | # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! |
|
|
603 | # please dont replace this function with test_flag in some future |
|
|
604 | # clean-up! |
|
|
605 | |
|
|
606 | [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0 |
|
|
607 | |
|
|
608 | local temp=$(emktemp) |
|
|
609 | echo "int main() { return(0); }" > "${temp}".c |
|
|
610 | MY_CC=$(tc-getCC) |
|
|
611 | ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 |
|
|
612 | local ret=$? |
|
|
613 | rm -f "${temp}".c |
|
|
614 | [[ ${ret} != 1 ]] && return 0 |
|
|
615 | return 1 |
|
|
616 | } |
|
|
617 | |
|
|
618 | # @FUNCTION: replace-sparc64-flags |
|
|
619 | # @DESCRIPTION: |
|
|
620 | # Sets mcpu to v8 and uses the original value as mtune if none specified. |
|
|
621 | replace-sparc64-flags() { |
|
|
622 | local SPARC64_CPUS="ultrasparc3 ultrasparc v9" |
|
|
623 | |
|
|
624 | if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then |
|
|
625 | for x in ${SPARC64_CPUS}; do |
|
|
626 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" |
|
|
627 | done |
|
|
628 | else |
|
|
629 | for x in ${SPARC64_CPUS}; do |
|
|
630 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
|
|
631 | done |
|
|
632 | fi |
|
|
633 | |
|
|
634 | if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then |
|
|
635 | for x in ${SPARC64_CPUS}; do |
|
|
636 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" |
|
|
637 | done |
|
|
638 | else |
|
|
639 | for x in ${SPARC64_CPUS}; do |
|
|
640 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
|
|
641 | done |
|
|
642 | fi |
|
|
643 | |
|
|
644 | export CFLAGS CXXFLAGS |
|
|
645 | } |
|
|
646 | |
|
|
647 | # @FUNCTION: append-ldflags |
|
|
648 | # @USAGE: <flags> |
|
|
649 | # @DESCRIPTION: |
|
|
650 | # Add extra <flags> to the current LDFLAGS. |
|
|
651 | append-ldflags() { |
|
|
652 | [[ -z $* ]] && return 0 |
|
|
653 | local flag |
|
|
654 | for flag in "$@"; do |
|
|
655 | [[ ${flag} == -l* ]] && \ |
|
|
656 | ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" |
|
|
657 | done |
|
|
658 | |
|
|
659 | export LDFLAGS="${LDFLAGS} $*" |
|
|
660 | return 0 |
|
|
661 | } |
|
|
662 | |
|
|
663 | # @FUNCTION: filter-ldflags |
|
|
664 | # @USAGE: <flags> |
|
|
665 | # @DESCRIPTION: |
|
|
666 | # Remove particular <flags> from LDFLAGS. Accepts shell globs. |
|
|
667 | filter-ldflags() { |
|
|
668 | _filter-var LDFLAGS "$@" |
|
|
669 | return 0 |
|
|
670 | } |
|
|
671 | |
|
|
672 | # @FUNCTION: raw-ldflags |
|
|
673 | # @USAGE: <flags> |
|
|
674 | # @DESCRIPTION: |
|
|
675 | # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results |
|
|
676 | # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed |
|
|
677 | # to gcc where it needs the '-Wl,'. |
|
|
678 | raw-ldflags() { |
|
|
679 | local x input="$@" |
|
|
680 | [[ -z ${input} ]] && input=${LDFLAGS} |
|
|
681 | set -- |
|
|
682 | for x in ${input} ; do |
|
|
683 | x=${x#-Wl,} |
|
|
684 | set -- "$@" ${x//,/ } |
|
|
685 | done |
|
|
686 | echo "$@" |
|
|
687 | } |
|
|
688 | |
|
|
689 | # @FUNCTION: bindnow-flags |
|
|
690 | # @RETURN: Returns the flags to enable "now" binding in the current selected linker. |
|
|
691 | # @DESCRIPTION: |
|
|
692 | # DEPRECATED - Gets the flags needed for "NOW" binding |
|
|
693 | bindnow-flags() { |
|
|
694 | ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" >&2 |
|
|
695 | |
|
|
696 | case $($(tc-getLD) -v 2>&1 </dev/null) in |
|
|
697 | *GNU* | *'with BFD'*) # GNU ld |
|
|
698 | echo "-Wl,-z,now" ;; |
|
|
699 | *Apple*) # Darwin ld |
|
|
700 | echo "-bind_at_load" ;; |
|
|
701 | *) |
|
|
702 | # Some linkers just recognize -V instead of -v |
|
|
703 | case $($(tc-getLD) -V 2>&1 </dev/null) in |
|
|
704 | *Solaris*) # Solaris accept almost the same GNU options |
|
|
705 | echo "-Wl,-z,now" ;; |
|
|
706 | esac |
|
|
707 | ;; |
|
|
708 | esac |
|
|
709 | } |
|
|
710 | |
|
|
711 | |
|
|
712 | # Some tests for when we screw with things and want to make |
|
|
713 | # sure we didn't break anything |
|
|
714 | #TESTS() { |
|
|
715 | # CFLAGS="-a -b -c=1" |
|
|
716 | # CXXFLAGS="-x -y -z=2" |
|
|
717 | # LDFLAGS="-l -m -n=3" |
|
|
718 | # |
|
|
719 | # die() { exit 1; } |
|
|
720 | # (is-flag 1 2 3) && die |
|
|
721 | # (is-ldflag 1 2 3) && die |
|
|
722 | # |
|
|
723 | # is-flagq -l && die |
|
|
724 | # is-ldflagq -a && die |
|
|
725 | # is-flagq -a || die |
|
|
726 | # is-flagq -x || die |
|
|
727 | # is-ldflagq -n=* || die |
|
|
728 | # is-ldflagq -n && die |
|
|
729 | # |
|
|
730 | # strip-unsupported-flags |
|
|
731 | # [[ ${CFLAGS} == "-c=1" ]] || die |
|
|
732 | # [[ ${CXXFLAGS} == "-y -z=2" ]] || die |
|
|
733 | # |
|
|
734 | # echo "All tests pass" |
|
|
735 | #} |
|
|
736 | #TESTS |