1 | # Copyright 1999-2003 Gentoo Technologies, Inc. |
1 | # Copyright 1999-2012 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 1.40 2004/03/12 11:21:15 vapier Exp $ |
3 | # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.184 2012/11/29 23:27:32 vapier Exp $ |
4 | # |
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5 | # Author Bart Verwilst <verwilst@gentoo.org> |
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6 | |
4 | |
7 | ECLASS=flag-o-matic |
5 | # @ECLASS: flag-o-matic.eclass |
8 | 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. |
9 | |
12 | |
10 | # |
13 | if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then |
11 | #### filter-flags <flags> #### |
14 | ___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank" |
12 | # Remove particular flags from C[XX]FLAGS |
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13 | # Matches only complete flags |
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14 | # |
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15 | #### append-flags <flags> #### |
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16 | # Add extra flags to your current C[XX]FLAGS |
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17 | # |
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18 | #### replace-flags <orig.flag> <new.flag> ### |
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19 | # Replace a flag by another one |
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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 | # |
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25 | #### is-flag <flag> #### |
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26 | # Returns "true" if flag is set in C[XX]FLAGS |
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27 | # Matches only complete a flag |
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28 | # |
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29 | #### strip-flags #### |
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30 | # Strip C[XX]FLAGS of everything except known |
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31 | # good options. |
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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 | # |
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37 | #### get-flag <flag> #### |
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38 | # Find and echo the value for a particular flag |
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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 | #### etexec-flags #### |
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53 | # hooked function for hardened-gcc that appends |
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54 | # -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed |
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55 | # and a package is filtering -fPIC,-fpic, -fPIE, -fpie |
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56 | # |
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57 | #### fstack-flags #### |
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58 | # hooked function for hardened-gcc that appends |
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59 | # -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed |
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60 | # and a package is filtering -fstack-protector, -fstack-protector-all |
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61 | # |
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62 | |
15 | |
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16 | inherit eutils toolchain-funcs multilib |
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17 | |
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18 | # Return all the flag variables that our high level funcs operate on. |
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19 | all-flag-vars() { |
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20 | echo {C,CPP,CXX,CCAS,F,FC,LD}FLAGS |
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21 | } |
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22 | |
63 | # C[XX]FLAGS that we allow in strip-flags |
23 | # {C,CPP,CXX,CCAS,F,FC,LD}FLAGS that we allow in strip-flags |
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24 | # Note: shell globs and character lists are allowed |
64 | setup-allowed-flags() { |
25 | setup-allowed-flags() { |
65 | export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" |
26 | ALLOWED_FLAGS="-pipe" |
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27 | ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune" |
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28 | ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all" |
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29 | ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow" |
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30 | ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time" |
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31 | ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+" |
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32 | ALLOWED_FLAGS+=" -fno-ident -fpermissive" |
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33 | ALLOWED_FLAGS+=" -W* -w" |
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34 | |
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35 | # allow a bunch of flags that negate features / control ABI |
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36 | ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \ |
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37 | -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \ |
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38 | -fno-omit-frame-pointer" |
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39 | ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \ |
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40 | -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \ |
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41 | -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \ |
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42 | -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \ |
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43 | -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ |
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44 | -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \ |
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45 | -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \ |
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46 | -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \ |
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47 | -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \ |
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48 | -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -mfloat-abi=* \ |
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49 | -D* -U*" |
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50 | |
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51 | # 4.5 |
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52 | ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp" |
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53 | # 4.6 |
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54 | ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm" |
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55 | # 4.7 |
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56 | ALLOWED_FLAGS+=" -mno-avx2 -mno-bmi2 -mno-fma -mno-lzcnt" |
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57 | |
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58 | # CPPFLAGS and LDFLAGS |
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59 | ALLOWED_FLAGS+=" -I* -L* -R* -Wl,*" |
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60 | |
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61 | export ALLOWED_FLAGS |
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62 | return 0 |
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63 | } |
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64 | |
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65 | # inverted filters for hardened compiler. This is trying to unpick |
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66 | # the hardened compiler defaults. |
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67 | _filter-hardened() { |
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68 | local f |
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69 | for f in "$@" ; do |
66 | case "${ARCH}" in |
70 | case "${f}" in |
67 | mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; |
71 | # Ideally we should only concern ourselves with PIE flags, |
68 | amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; |
72 | # not -fPIC or -fpic, but too many places filter -fPIC without |
69 | alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; |
73 | # thinking about -fPIE. |
70 | ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; |
74 | -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) |
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75 | gcc-specs-pie || continue |
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76 | is-flagq -nopie || append-flags -nopie;; |
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77 | -fstack-protector) |
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78 | gcc-specs-ssp || continue |
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79 | is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);; |
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80 | -fstack-protector-all) |
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81 | gcc-specs-ssp-to-all || continue |
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82 | is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);; |
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83 | -fno-strict-overflow) |
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84 | gcc-specs-nostrict || continue |
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85 | is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);; |
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86 | esac |
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87 | done |
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88 | } |
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89 | |
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90 | # Remove occurrences of strings from variable given in $1 |
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91 | # Strings removed are matched as globs, so for example |
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92 | # '-O*' would remove -O1, -O2 etc. |
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93 | _filter-var() { |
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94 | local f x var=$1 new=() |
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95 | shift |
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96 | |
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97 | for f in ${!var} ; do |
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98 | for x in "$@" ; do |
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99 | # Note this should work with globs like -O* |
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100 | [[ ${f} == ${x} ]] && continue 2 |
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101 | done |
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102 | new+=( "${f}" ) |
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103 | done |
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104 | eval export ${var}=\""${new[*]}"\" |
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105 | } |
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106 | |
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107 | # @FUNCTION: filter-flags |
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108 | # @USAGE: <flags> |
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109 | # @DESCRIPTION: |
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110 | # Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs. |
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111 | filter-flags() { |
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112 | _filter-hardened "$@" |
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113 | local v |
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114 | for v in $(all-flag-vars) ; do |
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115 | _filter-var ${v} "$@" |
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116 | done |
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117 | return 0 |
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118 | } |
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119 | |
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120 | # @FUNCTION: filter-lfs-flags |
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121 | # @DESCRIPTION: |
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122 | # Remove flags that enable Large File Support. |
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123 | filter-lfs-flags() { |
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124 | [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments" |
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125 | # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html |
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126 | # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...) |
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127 | # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...) |
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128 | # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t) |
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129 | filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
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130 | } |
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131 | |
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132 | # @FUNCTION: filter-ldflags |
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133 | # @USAGE: <flags> |
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134 | # @DESCRIPTION: |
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135 | # Remove particular <flags> from LDFLAGS. Accepts shell globs. |
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136 | filter-ldflags() { |
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137 | _filter-var LDFLAGS "$@" |
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138 | return 0 |
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139 | } |
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140 | |
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141 | # @FUNCTION: append-cppflags |
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142 | # @USAGE: <flags> |
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143 | # @DESCRIPTION: |
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144 | # Add extra <flags> to the current CPPFLAGS. |
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145 | append-cppflags() { |
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146 | [[ $# -eq 0 ]] && return 0 |
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147 | export CPPFLAGS="${CPPFLAGS} $*" |
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148 | return 0 |
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149 | } |
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150 | |
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151 | # @FUNCTION: append-cflags |
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152 | # @USAGE: <flags> |
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153 | # @DESCRIPTION: |
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154 | # Add extra <flags> to the current CFLAGS. |
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155 | append-cflags() { |
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156 | [[ $# -eq 0 ]] && return 0 |
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157 | export CFLAGS=$(test-flags-CC ${CFLAGS} "$@") |
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158 | return 0 |
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159 | } |
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160 | |
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161 | # @FUNCTION: append-cxxflags |
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162 | # @USAGE: <flags> |
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163 | # @DESCRIPTION: |
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164 | # Add extra <flags> to the current CXXFLAGS. |
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165 | append-cxxflags() { |
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166 | [[ $# -eq 0 ]] && return 0 |
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167 | export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@") |
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168 | return 0 |
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169 | } |
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170 | |
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171 | # @FUNCTION: append-fflags |
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172 | # @USAGE: <flags> |
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173 | # @DESCRIPTION: |
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174 | # Add extra <flags> to the current {F,FC}FLAGS. |
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175 | append-fflags() { |
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176 | [[ $# -eq 0 ]] && return 0 |
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177 | export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@") |
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178 | export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@") |
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179 | return 0 |
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180 | } |
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181 | |
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182 | # @FUNCTION: append-lfs-flags |
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183 | # @DESCRIPTION: |
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184 | # Add flags that enable Large File Support. |
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185 | append-lfs-flags() { |
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186 | [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments" |
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187 | # see comments in filter-lfs-flags func for meaning of these |
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188 | append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
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189 | } |
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190 | |
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191 | # @FUNCTION: append-ldflags |
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192 | # @USAGE: <flags> |
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193 | # @DESCRIPTION: |
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194 | # Add extra <flags> to the current LDFLAGS. |
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195 | append-ldflags() { |
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196 | [[ $# -eq 0 ]] && return 0 |
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197 | local flag |
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198 | for flag in "$@"; do |
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199 | [[ ${flag} == -l* ]] && \ |
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200 | eqawarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" |
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201 | done |
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202 | |
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203 | export LDFLAGS="${LDFLAGS} $*" |
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204 | return 0 |
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205 | } |
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206 | |
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207 | # @FUNCTION: append-flags |
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208 | # @USAGE: <flags> |
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209 | # @DESCRIPTION: |
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210 | # Add extra <flags> to your current {C,CXX,F,FC}FLAGS. |
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211 | append-flags() { |
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212 | [[ $# -eq 0 ]] && return 0 |
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213 | case " $* " in |
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214 | *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;; |
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215 | *' '-L*|\ |
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216 | *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;; |
71 | esac |
217 | esac |
72 | |
218 | append-cflags "$@" |
73 | # C[XX]FLAGS that we are think is ok, but needs testing |
219 | append-cxxflags "$@" |
74 | # NOTE: currently -Os have issues with gcc3 and K6* arch's |
220 | append-fflags "$@" |
75 | export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" |
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76 | return 0 |
221 | return 0 |
77 | } |
222 | } |
78 | |
223 | |
79 | filter-flags() { |
224 | # @FUNCTION: replace-flags |
80 | for x in "$@" ; do |
225 | # @USAGE: <old> <new> |
81 | case "${x}" in |
226 | # @DESCRIPTION: |
82 | -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; |
227 | # Replace the <old> flag with <new>. Accepts shell globs for <old>. |
83 | -fstack-protector|-fstack-protector-all) fstack-flags;; |
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84 | *) ;; |
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85 | esac |
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86 | done |
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87 | |
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88 | # we do this fancy spacing stuff so as to not filter |
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89 | # out part of a flag ... we want flag atoms ! :D |
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90 | CFLAGS=" ${CFLAGS} " |
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91 | CXXFLAGS=" ${CXXFLAGS} " |
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92 | for x in "$@" ; do |
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93 | CFLAGS="${CFLAGS// ${x} / }" |
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94 | CXXFLAGS="${CXXFLAGS// ${x} / }" |
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95 | done |
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96 | CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" |
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97 | CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" |
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98 | return 0 |
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99 | } |
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100 | |
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101 | filter-lfs-flags() { |
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102 | filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
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103 | } |
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104 | |
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105 | append-flags() { |
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106 | export CFLAGS="${CFLAGS} $@" |
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107 | export CXXFLAGS="${CXXFLAGS} $@" |
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108 | [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags |
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109 | return 0 |
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110 | } |
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111 | |
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112 | replace-flags() { |
228 | replace-flags() { |
113 | # we do this fancy spacing stuff so as to not filter |
229 | [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>" |
114 | # out part of a flag ... we want flag atoms ! :D |
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115 | CFLAGS=" ${CFLAGS} " |
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116 | CXXFLAGS=" ${CXXFLAGS} " |
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117 | CFLAGS="${CFLAGS// ${1} / ${2} }" |
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118 | CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" |
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119 | CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" |
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120 | CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" |
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121 | return 0 |
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122 | } |
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123 | |
230 | |
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231 | local f var new |
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232 | for var in $(all-flag-vars) ; do |
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233 | # Looping over the flags instead of using a global |
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234 | # substitution ensures that we're working with flag atoms. |
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235 | # Otherwise globs like -O* have the potential to wipe out the |
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236 | # list of flags. |
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237 | new=() |
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238 | for f in ${!var} ; do |
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239 | # Note this should work with globs like -O* |
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240 | [[ ${f} == ${1} ]] && f=${2} |
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241 | new+=( "${f}" ) |
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242 | done |
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243 | eval export ${var}=\""${new[*]}"\" |
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244 | done |
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245 | |
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246 | return 0 |
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247 | } |
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248 | |
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249 | # @FUNCTION: replace-cpu-flags |
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250 | # @USAGE: <old> <new> |
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251 | # @DESCRIPTION: |
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252 | # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu |
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253 | # with flags that select the <new> cpu. Accepts shell globs for <old>. |
124 | replace-cpu-flags() { |
254 | replace-cpu-flags() { |
125 | local newcpu="$1" ; shift |
255 | local newcpu="$#" ; newcpu="${!newcpu}" |
126 | local oldcpu="" |
256 | while [ $# -gt 1 ] ; do |
127 | for oldcpu in "$@" ; do |
257 | # quote to make sure that no globbing is done (particularly on |
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258 | # ${oldcpu}) prior to calling replace-flags |
128 | replace-flags -march=${oldcpu} -march=${newcpu} |
259 | replace-flags "-march=${1}" "-march=${newcpu}" |
129 | replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} |
260 | replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" |
130 | replace-flags -mtune=${oldcpu} -mtune=${newcpu} |
261 | replace-flags "-mtune=${1}" "-mtune=${newcpu}" |
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262 | shift |
131 | done |
263 | done |
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264 | return 0 |
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265 | } |
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266 | |
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267 | _is_flagq() { |
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268 | local x var |
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269 | eval var=\""\${$1[*]}"\" |
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270 | for x in ${var} ; do |
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271 | [[ ${x} == $2 ]] && return 0 |
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272 | done |
132 | return 0 |
273 | return 1 |
133 | } |
274 | } |
134 | |
275 | |
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276 | # @FUNCTION: is-flagq |
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277 | # @USAGE: <flag> |
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278 | # @DESCRIPTION: |
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279 | # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs. |
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280 | is-flagq() { |
|
|
281 | [[ -n $2 ]] && die "Usage: is-flag <flag>" |
|
|
282 | |
|
|
283 | local var |
|
|
284 | for var in $(all-flag-vars) ; do |
|
|
285 | _is_flagq ${var} "$1" && return 0 |
|
|
286 | done |
|
|
287 | return 1 |
|
|
288 | } |
|
|
289 | |
|
|
290 | # @FUNCTION: is-flag |
|
|
291 | # @USAGE: <flag> |
|
|
292 | # @DESCRIPTION: |
|
|
293 | # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs. |
135 | is-flag() { |
294 | is-flag() { |
136 | for x in ${CFLAGS} ${CXXFLAGS} ; do |
295 | is-flagq "$@" && echo true |
137 | if [ "${x}" == "$1" ] ; then |
|
|
138 | echo true |
|
|
139 | return 0 |
|
|
140 | fi |
|
|
141 | done |
|
|
142 | return 1 |
|
|
143 | } |
296 | } |
144 | |
297 | |
|
|
298 | # @FUNCTION: is-ldflagq |
|
|
299 | # @USAGE: <flag> |
|
|
300 | # @DESCRIPTION: |
|
|
301 | # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs. |
|
|
302 | is-ldflagq() { |
|
|
303 | [[ -n $2 ]] && die "Usage: is-ldflag <flag>" |
|
|
304 | _is_flagq LDFLAGS $1 |
|
|
305 | } |
|
|
306 | |
|
|
307 | # @FUNCTION: is-ldflag |
|
|
308 | # @USAGE: <flag> |
|
|
309 | # @DESCRIPTION: |
|
|
310 | # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs. |
|
|
311 | is-ldflag() { |
|
|
312 | is-ldflagq "$@" && echo true |
|
|
313 | } |
|
|
314 | |
|
|
315 | # @FUNCTION: filter-mfpmath |
|
|
316 | # @USAGE: <math types> |
|
|
317 | # @DESCRIPTION: |
|
|
318 | # Remove specified math types from the fpmath flag. For example, if the user |
|
|
319 | # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with |
|
|
320 | # -mfpmath=386. |
145 | filter-mfpmath() { |
321 | filter-mfpmath() { |
|
|
322 | local orig_mfpmath new_math prune_math |
|
|
323 | |
146 | # save the original -mfpmath flag |
324 | # save the original -mfpmath flag |
147 | local orig_mfpmath="`get-flag -mfpmath`" |
325 | orig_mfpmath=$(get-flag -mfpmath) |
148 | # get the value of the current -mfpmath flag |
326 | # get the value of the current -mfpmath flag |
149 | local new_math=" `get-flag mfpmath | tr , ' '` " |
327 | new_math=$(get-flag mfpmath) |
|
|
328 | new_math=" ${new_math//,/ } " |
150 | # figure out which math values are to be removed |
329 | # figure out which math values are to be removed |
151 | local prune_math="" |
330 | prune_math="" |
152 | for prune_math in "$@" ; do |
331 | for prune_math in "$@" ; do |
153 | new_math="${new_math/ ${prune_math} / }" |
332 | new_math=${new_math/ ${prune_math} / } |
154 | done |
333 | done |
155 | new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" |
334 | new_math=$(echo ${new_math}) |
|
|
335 | new_math=${new_math// /,} |
156 | |
336 | |
157 | if [ -z "${new_math}" ] ; then |
337 | if [[ -z ${new_math} ]] ; then |
158 | # if we're removing all user specified math values are |
338 | # if we're removing all user specified math values are |
159 | # slated for removal, then we just filter the flag |
339 | # slated for removal, then we just filter the flag |
160 | filter-flags ${orig_mfpmath} |
340 | filter-flags ${orig_mfpmath} |
161 | else |
341 | else |
162 | # if we only want to filter some of the user specified |
342 | # if we only want to filter some of the user specified |
… | |
… | |
164 | replace-flags ${orig_mfpmath} -mfpmath=${new_math} |
344 | replace-flags ${orig_mfpmath} -mfpmath=${new_math} |
165 | fi |
345 | fi |
166 | return 0 |
346 | return 0 |
167 | } |
347 | } |
168 | |
348 | |
|
|
349 | # @FUNCTION: strip-flags |
|
|
350 | # @DESCRIPTION: |
|
|
351 | # Strip *FLAGS of everything except known good/safe flags. This runs over all |
|
|
352 | # flags returned by all_flag_vars(). |
169 | strip-flags() { |
353 | strip-flags() { |
|
|
354 | local x y var |
|
|
355 | |
170 | setup-allowed-flags |
356 | setup-allowed-flags |
171 | |
357 | |
172 | local NEW_CFLAGS="" |
358 | set -f # disable pathname expansion |
173 | local NEW_CXXFLAGS="" |
|
|
174 | |
359 | |
175 | # Allow unstable C[XX]FLAGS if we are using unstable profile ... |
360 | for var in $(all-flag-vars) ; do |
176 | if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then |
361 | local new=() |
177 | [ `use debug` ] && einfo "Enabling the use of some unstable flags" |
362 | |
178 | ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" |
363 | for x in ${!var} ; do |
|
|
364 | local flag=${x%%=*} |
|
|
365 | for y in ${ALLOWED_FLAGS} ; do |
|
|
366 | if [[ -z ${flag%%${y}} ]] ; then |
|
|
367 | new+=( "${x}" ) |
|
|
368 | break |
|
|
369 | fi |
|
|
370 | done |
|
|
371 | done |
|
|
372 | |
|
|
373 | # In case we filtered out all optimization flags fallback to -O2 |
|
|
374 | if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then |
|
|
375 | new+=( -O2 ) |
|
|
376 | fi |
|
|
377 | |
|
|
378 | eval export ${var}=\""${new[*]}"\" |
|
|
379 | done |
|
|
380 | |
|
|
381 | set +f # re-enable pathname expansion |
|
|
382 | |
|
|
383 | return 0 |
|
|
384 | } |
|
|
385 | |
|
|
386 | test-flag-PROG() { |
|
|
387 | local comp=$1 |
|
|
388 | local lang=$2 |
|
|
389 | local flag=$3 |
|
|
390 | |
|
|
391 | [[ -z ${comp} || -z ${flag} ]] && return 1 |
|
|
392 | |
|
|
393 | # use -c so we can test the assembler as well |
|
|
394 | local PROG=$(tc-get${comp}) |
|
|
395 | ${PROG} "${flag}" -c -o /dev/null -x${lang} - < /dev/null \ |
|
|
396 | > /dev/null 2>&1 |
|
|
397 | } |
|
|
398 | |
|
|
399 | # @FUNCTION: test-flag-CC |
|
|
400 | # @USAGE: <flag> |
|
|
401 | # @DESCRIPTION: |
|
|
402 | # Returns shell true if <flag> is supported by the C compiler, else returns shell false. |
|
|
403 | test-flag-CC() { test-flag-PROG "CC" c "$1"; } |
|
|
404 | |
|
|
405 | # @FUNCTION: test-flag-CXX |
|
|
406 | # @USAGE: <flag> |
|
|
407 | # @DESCRIPTION: |
|
|
408 | # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false. |
|
|
409 | test-flag-CXX() { test-flag-PROG "CXX" c++ "$1"; } |
|
|
410 | |
|
|
411 | # @FUNCTION: test-flag-F77 |
|
|
412 | # @USAGE: <flag> |
|
|
413 | # @DESCRIPTION: |
|
|
414 | # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false. |
|
|
415 | test-flag-F77() { test-flag-PROG "F77" f77 "$1"; } |
|
|
416 | |
|
|
417 | # @FUNCTION: test-flag-FC |
|
|
418 | # @USAGE: <flag> |
|
|
419 | # @DESCRIPTION: |
|
|
420 | # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false. |
|
|
421 | test-flag-FC() { test-flag-PROG "FC" f95 "$1"; } |
|
|
422 | |
|
|
423 | test-flags-PROG() { |
|
|
424 | local comp=$1 |
|
|
425 | local flags=() |
|
|
426 | local x |
|
|
427 | |
|
|
428 | shift |
|
|
429 | |
|
|
430 | [[ -z ${comp} ]] && return 1 |
|
|
431 | |
|
|
432 | for x ; do |
|
|
433 | test-flag-${comp} "${x}" && flags+=( "${x}" ) |
|
|
434 | done |
|
|
435 | |
|
|
436 | echo "${flags[*]}" |
|
|
437 | |
|
|
438 | # Just bail if we dont have any flags |
|
|
439 | [[ ${#flags[@]} -gt 0 ]] |
|
|
440 | } |
|
|
441 | |
|
|
442 | # @FUNCTION: test-flags-CC |
|
|
443 | # @USAGE: <flags> |
|
|
444 | # @DESCRIPTION: |
|
|
445 | # Returns shell true if <flags> are supported by the C compiler, else returns shell false. |
|
|
446 | test-flags-CC() { test-flags-PROG "CC" "$@"; } |
|
|
447 | |
|
|
448 | # @FUNCTION: test-flags-CXX |
|
|
449 | # @USAGE: <flags> |
|
|
450 | # @DESCRIPTION: |
|
|
451 | # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false. |
|
|
452 | test-flags-CXX() { test-flags-PROG "CXX" "$@"; } |
|
|
453 | |
|
|
454 | # @FUNCTION: test-flags-F77 |
|
|
455 | # @USAGE: <flags> |
|
|
456 | # @DESCRIPTION: |
|
|
457 | # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false. |
|
|
458 | test-flags-F77() { test-flags-PROG "F77" "$@"; } |
|
|
459 | |
|
|
460 | # @FUNCTION: test-flags-FC |
|
|
461 | # @USAGE: <flags> |
|
|
462 | # @DESCRIPTION: |
|
|
463 | # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false. |
|
|
464 | test-flags-FC() { test-flags-PROG "FC" "$@"; } |
|
|
465 | |
|
|
466 | # @FUNCTION: test-flags |
|
|
467 | # @USAGE: <flags> |
|
|
468 | # @DESCRIPTION: |
|
|
469 | # Short-hand that should hopefully work for both C and C++ compiler, but |
|
|
470 | # its really only present due to the append-flags() abomination. |
|
|
471 | test-flags() { test-flags-CC "$@"; } |
|
|
472 | |
|
|
473 | # @FUNCTION: test_version_info |
|
|
474 | # @USAGE: <version> |
|
|
475 | # @DESCRIPTION: |
|
|
476 | # Returns shell true if the current C compiler version matches <version>, else returns shell false. |
|
|
477 | # Accepts shell globs. |
|
|
478 | test_version_info() { |
|
|
479 | if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then |
|
|
480 | return 0 |
|
|
481 | else |
|
|
482 | return 1 |
179 | fi |
483 | fi |
180 | |
|
|
181 | set -f |
|
|
182 | |
|
|
183 | for x in ${CFLAGS} |
|
|
184 | do |
|
|
185 | for y in ${ALLOWED_FLAGS} |
|
|
186 | do |
|
|
187 | flag=${x%%=*} |
|
|
188 | if [ "${flag%%${y}}" = "" ] |
|
|
189 | then |
|
|
190 | NEW_CFLAGS="${NEW_CFLAGS} ${x}" |
|
|
191 | break |
|
|
192 | fi |
|
|
193 | done |
|
|
194 | done |
|
|
195 | |
|
|
196 | for x in ${CXXFLAGS} |
|
|
197 | do |
|
|
198 | for y in ${ALLOWED_FLAGS} |
|
|
199 | do |
|
|
200 | flag=${x%%=*} |
|
|
201 | if [ "${flag%%${y}}" = "" ] |
|
|
202 | then |
|
|
203 | NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" |
|
|
204 | break |
|
|
205 | fi |
|
|
206 | done |
|
|
207 | done |
|
|
208 | |
|
|
209 | # In case we filtered out all optimization flags fallback to -O2 |
|
|
210 | if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then |
|
|
211 | NEW_CFLAGS="${NEW_CFLAGS} -O2" |
|
|
212 | fi |
|
|
213 | if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then |
|
|
214 | NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" |
|
|
215 | fi |
|
|
216 | |
|
|
217 | set +f |
|
|
218 | |
|
|
219 | [ `use debug` ] \ |
|
|
220 | && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \ |
|
|
221 | && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\"" |
|
|
222 | |
|
|
223 | export CFLAGS="${NEW_CFLAGS}" |
|
|
224 | export CXXFLAGS="${NEW_CXXFLAGS}" |
|
|
225 | return 0 |
|
|
226 | } |
484 | } |
227 | |
485 | |
228 | test_flag() { |
486 | # @FUNCTION: strip-unsupported-flags |
229 | if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then |
487 | # @DESCRIPTION: |
230 | echo "$@" |
488 | # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain. |
231 | return 0 |
|
|
232 | fi |
|
|
233 | return 1 |
|
|
234 | } |
|
|
235 | |
|
|
236 | strip-unsupported-flags() { |
489 | strip-unsupported-flags() { |
237 | for x in ${CFLAGS} ; do |
490 | export CFLAGS=$(test-flags-CC ${CFLAGS}) |
238 | NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" |
491 | export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) |
239 | done |
492 | export FFLAGS=$(test-flags-F77 ${FFLAGS}) |
240 | for x in ${CXXFLAGS} ; do |
493 | export FCFLAGS=$(test-flags-FC ${FCFLAGS}) |
241 | NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`" |
|
|
242 | done |
|
|
243 | |
|
|
244 | export CFLAGS="${NEW_CFLAGS}" |
|
|
245 | export CXXFLAGS="${NEW_CXXFLAGS}" |
|
|
246 | } |
494 | } |
247 | |
495 | |
|
|
496 | # @FUNCTION: get-flag |
|
|
497 | # @USAGE: <flag> |
|
|
498 | # @DESCRIPTION: |
|
|
499 | # Find and echo the value for a particular flag. Accepts shell globs. |
248 | get-flag() { |
500 | get-flag() { |
|
|
501 | local f var findflag="$1" |
|
|
502 | |
249 | # this code looks a little flaky but seems to work for |
503 | # this code looks a little flaky but seems to work for |
250 | # everything we want ... |
504 | # everything we want ... |
251 | # for example, if CFLAGS="-march=i686": |
505 | # for example, if CFLAGS="-march=i686": |
252 | # `get-flags -march` == "-march=i686" |
506 | # `get-flag -march` == "-march=i686" |
253 | # `get-flags march` == "i686" |
507 | # `get-flag march` == "i686" |
254 | local findflag="$1" |
508 | for var in $(all-flag-vars) ; do |
255 | for f in ${CFLAGS} ${CXXFLAGS} ; do |
509 | for f in ${!var} ; do |
256 | if [ "${f/${findflag}}" != "${f}" ] ; then |
510 | if [ "${f/${findflag}}" != "${f}" ] ; then |
257 | echo "${f/-${findflag}=}" |
511 | printf "%s\n" "${f/-${findflag}=}" |
258 | return 0 |
512 | return 0 |
259 | fi |
513 | fi |
|
|
514 | done |
260 | done |
515 | done |
261 | return 1 |
516 | return 1 |
262 | } |
517 | } |
263 | |
518 | |
|
|
519 | # @FUNCTION: has_m64 |
|
|
520 | # @DESCRIPTION: |
|
|
521 | # This doesn't test if the flag is accepted, it tests if the flag actually |
|
|
522 | # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works |
|
|
523 | # return code is 0, else the return code is 1. |
|
|
524 | has_m64() { |
|
|
525 | eqawarn "${FUNCNAME}: don't use this anymore" |
|
|
526 | |
|
|
527 | # this doesnt test if the flag is accepted, it tests if the flag |
|
|
528 | # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! |
|
|
529 | # please dont replace this function with test_flag in some future |
|
|
530 | # clean-up! |
|
|
531 | |
|
|
532 | local temp="$(emktemp)" |
|
|
533 | echo "int main() { return(0); }" > "${temp}".c |
|
|
534 | MY_CC=$(tc-getCC) |
|
|
535 | ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 |
|
|
536 | local ret=$? |
|
|
537 | rm -f "${temp}".c |
|
|
538 | [[ ${ret} != 1 ]] && return 0 |
|
|
539 | return 1 |
|
|
540 | } |
|
|
541 | |
|
|
542 | has_m32() { |
|
|
543 | die "${FUNCNAME}: don't use this anymore" |
|
|
544 | } |
|
|
545 | |
|
|
546 | # @FUNCTION: replace-sparc64-flags |
|
|
547 | # @DESCRIPTION: |
|
|
548 | # Sets mcpu to v8 and uses the original value as mtune if none specified. |
264 | replace-sparc64-flags() { |
549 | replace-sparc64-flags() { |
265 | local SPARC64_CPUS="ultrasparc v9" |
550 | local SPARC64_CPUS="ultrasparc3 ultrasparc v9" |
266 | |
551 | |
267 | if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] |
552 | if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then |
268 | then |
|
|
269 | for x in ${SPARC64_CPUS} |
553 | for x in ${SPARC64_CPUS}; do |
270 | do |
|
|
271 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" |
554 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" |
272 | done |
555 | done |
273 | else |
556 | else |
274 | for x in ${SPARC64_CPUS} |
557 | for x in ${SPARC64_CPUS}; do |
275 | do |
|
|
276 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
558 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
277 | done |
559 | done |
278 | fi |
560 | fi |
279 | |
561 | |
280 | if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] |
562 | if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then |
281 | then |
|
|
282 | for x in ${SPARC64_CPUS} |
563 | for x in ${SPARC64_CPUS}; do |
283 | do |
|
|
284 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" |
564 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" |
285 | done |
565 | done |
286 | else |
566 | else |
287 | for x in ${SPARC64_CPUS} |
567 | for x in ${SPARC64_CPUS}; do |
288 | do |
|
|
289 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
568 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
290 | done |
569 | done |
291 | fi |
570 | fi |
292 | } |
|
|
293 | |
571 | |
|
|
572 | export CFLAGS CXXFLAGS |
|
|
573 | } |
|
|
574 | |
|
|
575 | # @FUNCTION: append-libs |
|
|
576 | # @USAGE: <libs> |
|
|
577 | # @DESCRIPTION: |
|
|
578 | # Add extra <libs> to the current LIBS. |
294 | append-ldflags() { |
579 | append-libs() { |
295 | LDFLAGS="${LDFLAGS} $@" |
580 | [[ $# -eq 0 ]] && return 0 |
296 | return 0 |
581 | local flag |
297 | } |
582 | for flag in "$@"; do |
|
|
583 | [[ ${flag} == -l* ]] && flag=${flag#-l} |
|
|
584 | export LIBS="${LIBS} -l${flag}" |
|
|
585 | done |
298 | |
586 | |
299 | etexec-flags() { |
587 | return 0 |
300 | has_version sys-devel/hardened-gcc |
588 | } |
301 | if [ $? == 0 ] ; then |
589 | |
302 | if [ "`is-flag -yet_exec`" != "true" ]; then |
590 | # @FUNCTION: raw-ldflags |
303 | debug-print ">>> appending flags -yet_exec" |
591 | # @USAGE: [flags] |
304 | append-flags -yet_exec |
592 | # @DESCRIPTION: |
305 | append-ldflags -yet_exec |
593 | # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results |
306 | fi |
594 | # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed |
|
|
595 | # to gcc where it needs the '-Wl,'. |
|
|
596 | # |
|
|
597 | # If no flags are specified, then default to ${LDFLAGS}. |
|
|
598 | raw-ldflags() { |
|
|
599 | local x input="$@" |
|
|
600 | [[ -z ${input} ]] && input=${LDFLAGS} |
|
|
601 | set -- |
|
|
602 | for x in ${input} ; do |
|
|
603 | case ${x} in |
|
|
604 | -Wl,*) |
|
|
605 | x=${x#-Wl,} |
|
|
606 | set -- "$@" ${x//,/ } |
|
|
607 | ;; |
|
|
608 | *) # Assume it's a compiler driver flag, so throw it away #441808 |
|
|
609 | ;; |
|
|
610 | esac |
|
|
611 | done |
|
|
612 | echo "$@" |
|
|
613 | } |
|
|
614 | |
|
|
615 | # @FUNCTION: no-as-needed |
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616 | # @RETURN: Flag to disable asneeded behavior for use with append-ldflags. |
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617 | no-as-needed() { |
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618 | case $($(tc-getLD) -v 2>&1 </dev/null) in |
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619 | *GNU*) # GNU ld |
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620 | echo "-Wl,--no-as-needed" ;; |
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621 | esac |
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622 | } |
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623 | |
307 | fi |
624 | fi |
308 | } |
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309 | |
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310 | fstack-flags() { |
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311 | has_version sys-devel/hardened-gcc |
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312 | if [ $? == 0 ] ; then |
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313 | if [ "`is-flag -yno_propolice`" != "true" ]; then |
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314 | debug-print ">>> appending flags -yno_propolice" |
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315 | append-flags -yno_propolice |
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316 | append-ldflags -yno_propolice |
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317 | fi |
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318 | fi |
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319 | } |
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