| 1 | # Copyright 1999-2004 Gentoo Foundation |
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 | # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.62 2004/07/15 04:59:44 lv Exp $ |
3 | # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.123 2008/06/07 16:42:32 flameeyes Exp $ |
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4 | |
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5 | # @ECLASS: flag-o-matic.eclass |
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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. |
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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 |
| 4 | # |
21 | # |
| 5 | # Author Bart Verwilst <verwilst@gentoo.org> |
22 | # has_hardened |
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23 | # has_pie |
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24 | # has_pic |
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25 | # has_ssp_all |
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26 | # has_ssp |
| 6 | |
27 | |
| 7 | ECLASS=flag-o-matic |
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| 8 | INHERITED="$INHERITED $ECLASS" |
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| 9 | IUSE="$IUSE debug" |
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| 10 | |
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| 11 | # |
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| 12 | #### filter-flags <flags> #### |
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| 13 | # Remove particular flags from C[XX]FLAGS |
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| 14 | # Matches only complete flags |
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| 15 | # |
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| 16 | #### append-flags <flags> #### |
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| 17 | # Add extra flags to your current C[XX]FLAGS |
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| 18 | # |
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| 19 | #### replace-flags <orig.flag> <new.flag> ### |
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| 20 | # Replace a flag by another one |
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| 21 | # |
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| 22 | #### replace-cpu-flags <new.cpu> <old.cpus> ### |
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| 23 | # Replace march/mcpu flags that specify <old.cpus> |
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| 24 | # with flags that specify <new.cpu> |
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| 25 | # |
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| 26 | #### is-flag <flag> #### |
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| 27 | # Returns "true" if flag is set in C[XX]FLAGS |
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| 28 | # Matches only complete a flag |
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| 29 | # |
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| 30 | #### strip-flags #### |
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| 31 | # Strip C[XX]FLAGS of everything except known |
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| 32 | # good options. |
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| 33 | # |
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| 34 | #### strip-unsupported-flags #### |
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| 35 | # Strip C[XX]FLAGS of any flags not supported by |
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| 36 | # installed version of gcc |
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| 37 | # |
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| 38 | #### get-flag <flag> #### |
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| 39 | # Find and echo the value for a particular flag |
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| 40 | # |
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| 41 | #### replace-sparc64-flags #### |
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| 42 | # Sets mcpu to v8 and uses the original value |
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| 43 | # as mtune if none specified. |
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| 44 | # |
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| 45 | #### filter-mfpmath <math types> #### |
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| 46 | # Remove specified math types from the fpmath specification |
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| 47 | # If the user has -mfpmath=sse,386, running `filter-mfpmath sse` |
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| 48 | # will leave the user with -mfpmath=386 |
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| 49 | # |
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| 50 | #### append-ldflags #### |
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| 51 | # Add extra flags to your current LDFLAGS |
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| 52 | # |
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| 53 | #### filter-ldflags <flags> #### |
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| 54 | # Remove particular flags from LDFLAGS |
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| 55 | # Matches only complete flags |
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| 56 | # |
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| 57 | #### etexec-flags #### |
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| 58 | # hooked function for hardened gcc that appends |
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| 59 | # -fno-pic to {C,CXX,LD}FLAGS |
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| 60 | # when a package is filtering -fpic, -fPIC, -fpie, -fPIE |
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| 61 | # |
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| 62 | #### fstack-flags #### |
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| 63 | # hooked function for hardened gcc that appends |
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| 64 | # -fno-stack-protector to {C,CXX,LD}FLAGS |
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| 65 | # when a package is filtering -fstack-protector, -fstack-protector-all |
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| 66 | # notice: modern automatic specs files will also suppress -fstack-protector-all |
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| 67 | # when only -fno-stack-protector is given |
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| 68 | # |
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| 69 | |
28 | |
| 70 | # C[XX]FLAGS that we allow in strip-flags |
29 | # C[XX]FLAGS that we allow in strip-flags |
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30 | # Note: shell globs and character lists are allowed |
| 71 | setup-allowed-flags() { |
31 | setup-allowed-flags() { |
| 72 | if [ -z "${ALLOWED_FLAGS}" ] ; then |
32 | if [[ -z ${ALLOWED_FLAGS} ]] ; then |
| 73 | export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" |
33 | export ALLOWED_FLAGS="-pipe" |
| 74 | case "${ARCH}" in |
34 | export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" |
| 75 | mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; |
35 | export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" |
| 76 | amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; |
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" |
| 77 | x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; |
40 | export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w" |
| 78 | alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; |
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| 79 | ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; |
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| 80 | esac |
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| 81 | fi |
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*" |
| 82 | |
55 | |
| 83 | # C[XX]FLAGS that we are think is ok, but needs testing |
56 | # C[XX]FLAGS that we are think is ok, but needs testing |
| 84 | # NOTE: currently -Os have issues with gcc3 and K6* arch's |
57 | # NOTE: currently -Os have issues with gcc3 and K6* arch's |
| 85 | export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" |
58 | export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" |
| 86 | return 0 |
59 | return 0 |
| 87 | } |
60 | } |
| 88 | |
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}FLAGS. Accepts shell globs. |
| 89 | filter-flags() { |
108 | filter-flags() { |
| 90 | local x f fset |
109 | _filter-hardened "$@" |
| 91 | declare -a new_CFLAGS new_CXXFLAGS |
110 | _filter-var CFLAGS "$@" |
| 92 | |
111 | _filter-var CPPFLAGS "$@" |
| 93 | for x in "$@" ; do |
112 | _filter-var CXXFLAGS "$@" |
| 94 | case "${x}" in |
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| 95 | -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; |
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| 96 | -fstack-protector|-fstack-protector-all) fstack-flags;; |
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| 97 | esac |
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| 98 | done |
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| 99 | |
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| 100 | for fset in CFLAGS CXXFLAGS; do |
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| 101 | for f in ${!fset}; do |
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| 102 | for x in "$@"; do |
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| 103 | # Note this should work with globs like -O* |
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| 104 | [[ ${f} == ${x} ]] && continue 2 |
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| 105 | done |
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| 106 | eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} |
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| 107 | done |
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| 108 | eval export ${fset}=\${new_${fset}\[*]} |
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| 109 | done |
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| 110 | |
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| 111 | return 0 |
113 | return 0 |
| 112 | } |
114 | } |
| 113 | |
115 | |
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116 | # @FUNCTION: filter-lfs-flags |
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117 | # @DESCRIPTION: |
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118 | # Remove flags that enable Large File Support. |
| 114 | filter-lfs-flags() { |
119 | filter-lfs-flags() { |
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120 | [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" |
| 115 | filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
121 | filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
| 116 | } |
122 | } |
| 117 | |
123 | |
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124 | # @FUNCTION: append-cppflags |
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125 | # @USAGE: <flags> |
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126 | # @DESCRIPTION: |
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127 | # Add extra <flags> to the current CPPFLAGS. |
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128 | append-cppflags() { |
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129 | [[ -z $* ]] && return 0 |
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130 | export CPPFLAGS="${CPPFLAGS} $*" |
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131 | return 0 |
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132 | } |
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133 | |
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134 | # @FUNCTION: append-lfs-flags |
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135 | # @DESCRIPTION: |
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136 | # Add flags that enable Large File Support. |
| 118 | append-lfs-flags() { |
137 | append-lfs-flags() { |
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138 | [[ -n $@ ]] && die "append-lfs-flags takes no arguments" |
| 119 | append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
139 | append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
| 120 | } |
140 | } |
| 121 | |
141 | |
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142 | # @FUNCTION: append-flags |
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143 | # @USAGE: <flags> |
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144 | # @DESCRIPTION: |
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145 | # Add extra <flags> to your current C[XX]FLAGS. |
| 122 | append-flags() { |
146 | append-flags() { |
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147 | [[ -z $* ]] && return 0 |
| 123 | export CFLAGS="${CFLAGS} $*" |
148 | export CFLAGS="${CFLAGS} $*" |
| 124 | export CXXFLAGS="${CXXFLAGS} $*" |
149 | export CXXFLAGS="${CXXFLAGS} $*" |
| 125 | [ -n "`is-flag -fno-stack-protector`" -o \ |
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| 126 | -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags |
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| 127 | return 0 |
150 | return 0 |
| 128 | } |
151 | } |
| 129 | |
152 | |
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153 | # @FUNCTION: replace-flags |
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154 | # @USAGE: <old> <new> |
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155 | # @DESCRIPTION: |
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156 | # Replace the <old> flag with <new>. Accepts shell globs for <old>. |
| 130 | replace-flags() { |
157 | replace-flags() { |
| 131 | # we do this fancy spacing stuff so as to not filter |
158 | [[ $# != 2 ]] \ |
| 132 | # out part of a flag ... we want flag atoms ! :D |
159 | && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ |
| 133 | CFLAGS=" ${CFLAGS} " |
160 | && die "replace-flags takes 2 arguments, not $#" |
| 134 | CXXFLAGS=" ${CXXFLAGS} " |
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| 135 | CFLAGS="${CFLAGS// ${1} / ${2} }" |
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| 136 | CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" |
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| 137 | CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" |
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| 138 | CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" |
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| 139 | export CFLAGS CXXFLAGS |
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| 140 | return 0 |
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| 141 | } |
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| 142 | |
161 | |
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162 | local f fset |
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163 | declare -a new_CFLAGS new_CXXFLAGS |
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164 | |
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165 | for fset in CFLAGS CXXFLAGS; do |
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166 | # Looping over the flags instead of using a global |
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167 | # substitution ensures that we're working with flag atoms. |
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168 | # Otherwise globs like -O* have the potential to wipe out the |
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169 | # list of flags. |
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170 | for f in ${!fset}; do |
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171 | # Note this should work with globs like -O* |
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172 | [[ ${f} == ${1} ]] && f=${2} |
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173 | eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} |
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174 | done |
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175 | eval export ${fset}=\${new_${fset}\[*]} |
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176 | done |
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177 | |
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178 | return 0 |
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179 | } |
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180 | |
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181 | # @FUNCTION: replace-cpu-flags |
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182 | # @USAGE: <old> <new> |
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183 | # @DESCRIPTION: |
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184 | # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu |
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185 | # with flags that select the <new> cpu. Accepts shell globs for <old>. |
| 143 | replace-cpu-flags() { |
186 | replace-cpu-flags() { |
| 144 | local oldcpu newcpu="$1" ; shift |
187 | local newcpu="$#" ; newcpu="${!newcpu}" |
| 145 | for oldcpu in "$@" ; do |
188 | while [ $# -gt 1 ] ; do |
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189 | # quote to make sure that no globbing is done (particularly on |
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190 | # ${oldcpu}) prior to calling replace-flags |
| 146 | replace-flags -march=${oldcpu} -march=${newcpu} |
191 | replace-flags "-march=${1}" "-march=${newcpu}" |
| 147 | replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} |
192 | replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" |
| 148 | replace-flags -mtune=${oldcpu} -mtune=${newcpu} |
193 | replace-flags "-mtune=${1}" "-mtune=${newcpu}" |
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194 | shift |
| 149 | done |
195 | done |
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196 | return 0 |
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197 | } |
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198 | |
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199 | _is_flagq() { |
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200 | local x |
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201 | for x in ${!1} ; do |
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202 | [[ ${x} == $2 ]] && return 0 |
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203 | done |
| 150 | return 0 |
204 | return 1 |
| 151 | } |
205 | } |
| 152 | |
206 | |
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207 | # @FUNCTION: is-flagq |
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208 | # @USAGE: <flag> |
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209 | # @DESCRIPTION: |
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210 | # Returns shell true if <flag> is in C[XX]FLAGS, else returns shell false. Accepts shell globs. |
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211 | is-flagq() { |
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212 | [[ -n $2 ]] && die "Usage: is-flag <flag>" |
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213 | _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 |
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214 | } |
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215 | |
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216 | # @FUNCTION: is-flag |
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217 | # @USAGE: <flag> |
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218 | # @DESCRIPTION: |
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219 | # Echo's "true" if flag is set in C[XX]FLAGS. Accepts shell globs. |
| 153 | is-flag() { |
220 | is-flag() { |
| 154 | local x |
221 | is-flagq "$@" && echo true |
| 155 | |
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| 156 | for x in ${CFLAGS} ${CXXFLAGS} ; do |
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| 157 | if [ "${x}" == "$1" ] ; then |
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| 158 | echo true |
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| 159 | return 0 |
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| 160 | fi |
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| 161 | done |
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| 162 | return 1 |
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| 163 | } |
222 | } |
| 164 | |
223 | |
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224 | # @FUNCTION: is-ldflagq |
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225 | # @USAGE: <flag> |
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226 | # @DESCRIPTION: |
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227 | # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs. |
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228 | is-ldflagq() { |
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229 | [[ -n $2 ]] && die "Usage: is-ldflag <flag>" |
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230 | _is_flagq LDFLAGS $1 |
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231 | } |
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232 | |
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233 | # @FUNCTION: is-ldflag |
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234 | # @USAGE: <flag> |
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235 | # @DESCRIPTION: |
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236 | # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs. |
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237 | is-ldflag() { |
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238 | is-ldflagq "$@" && echo true |
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239 | } |
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240 | |
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241 | # @FUNCTION: filter-mfpmath |
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242 | # @USAGE: <math types> |
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243 | # @DESCRIPTION: |
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244 | # Remove specified math types from the fpmath flag. For example, if the user |
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245 | # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with |
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246 | # -mfpmath=386. |
| 165 | filter-mfpmath() { |
247 | filter-mfpmath() { |
| 166 | local orig_mfpmath new_math prune_math |
248 | local orig_mfpmath new_math prune_math |
| 167 | |
249 | |
| 168 | # save the original -mfpmath flag |
250 | # save the original -mfpmath flag |
| 169 | orig_mfpmath="`get-flag -mfpmath`" |
251 | orig_mfpmath=$(get-flag -mfpmath) |
| 170 | # get the value of the current -mfpmath flag |
252 | # get the value of the current -mfpmath flag |
| 171 | new_math=" `get-flag mfpmath | tr , ' '` " |
253 | new_math=$(get-flag mfpmath) |
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254 | new_math=" ${new_math//,/ } " |
| 172 | # figure out which math values are to be removed |
255 | # figure out which math values are to be removed |
| 173 | prune_math="" |
256 | prune_math="" |
| 174 | for prune_math in "$@" ; do |
257 | for prune_math in "$@" ; do |
| 175 | new_math="${new_math/ ${prune_math} / }" |
258 | new_math=${new_math/ ${prune_math} / } |
| 176 | done |
259 | done |
| 177 | new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" |
260 | new_math=$(echo ${new_math}) |
|
|
261 | new_math=${new_math// /,} |
| 178 | |
262 | |
| 179 | if [ -z "${new_math}" ] ; then |
263 | if [[ -z ${new_math} ]] ; then |
| 180 | # if we're removing all user specified math values are |
264 | # if we're removing all user specified math values are |
| 181 | # slated for removal, then we just filter the flag |
265 | # slated for removal, then we just filter the flag |
| 182 | filter-flags ${orig_mfpmath} |
266 | filter-flags ${orig_mfpmath} |
| 183 | else |
267 | else |
| 184 | # if we only want to filter some of the user specified |
268 | # if we only want to filter some of the user specified |
| … | |
… | |
| 186 | replace-flags ${orig_mfpmath} -mfpmath=${new_math} |
270 | replace-flags ${orig_mfpmath} -mfpmath=${new_math} |
| 187 | fi |
271 | fi |
| 188 | return 0 |
272 | return 0 |
| 189 | } |
273 | } |
| 190 | |
274 | |
|
|
275 | # @FUNCTION: strip-flags |
|
|
276 | # @DESCRIPTION: |
|
|
277 | # Strip C[XX]FLAGS of everything except known good/safe flags. |
| 191 | strip-flags() { |
278 | strip-flags() { |
| 192 | local x y flag NEW_CFLAGS NEW_CXXFLAGS |
279 | local x y flag NEW_CFLAGS NEW_CXXFLAGS |
| 193 | |
280 | |
| 194 | setup-allowed-flags |
281 | setup-allowed-flags |
| 195 | |
282 | |
| 196 | local NEW_CFLAGS="" |
283 | local NEW_CFLAGS="" |
| 197 | local NEW_CXXFLAGS="" |
284 | local NEW_CXXFLAGS="" |
| 198 | |
285 | |
| 199 | # Allow unstable C[XX]FLAGS if we are using unstable profile ... |
286 | # Allow unstable C[XX]FLAGS if we are using unstable profile ... |
| 200 | if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then |
287 | if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then |
| 201 | use debug && einfo "Enabling the use of some unstable flags" |
|
|
| 202 | ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" |
288 | ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" |
| 203 | fi |
289 | fi |
| 204 | |
290 | |
| 205 | set -f # disable pathname expansion |
291 | set -f # disable pathname expansion |
| 206 | |
292 | |
| 207 | for x in ${CFLAGS}; do |
293 | for x in ${CFLAGS}; do |
| 208 | for y in ${ALLOWED_FLAGS}; do |
294 | for y in ${ALLOWED_FLAGS}; do |
| 209 | flag=${x%%=*} |
295 | flag=${x%%=*} |
| 210 | if [ "${flag%%${y}}" = "" ]; then |
296 | if [ "${flag%%${y}}" = "" ] ; then |
| 211 | NEW_CFLAGS="${NEW_CFLAGS} ${x}" |
297 | NEW_CFLAGS="${NEW_CFLAGS} ${x}" |
| 212 | break |
298 | break |
| 213 | fi |
299 | fi |
| 214 | done |
300 | done |
| 215 | done |
301 | done |
| 216 | |
302 | |
| 217 | for x in ${CXXFLAGS}; do |
303 | for x in ${CXXFLAGS}; do |
| 218 | for y in ${ALLOWED_FLAGS}; do |
304 | for y in ${ALLOWED_FLAGS}; do |
| 219 | flag=${x%%=*} |
305 | flag=${x%%=*} |
| 220 | if [ "${flag%%${y}}" = "" ]; then |
306 | if [ "${flag%%${y}}" = "" ] ; then |
| 221 | NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" |
307 | NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" |
| 222 | break |
308 | break |
| 223 | fi |
309 | fi |
| 224 | done |
310 | done |
| 225 | done |
311 | done |
| … | |
… | |
| 237 | export CFLAGS="${NEW_CFLAGS}" |
323 | export CFLAGS="${NEW_CFLAGS}" |
| 238 | export CXXFLAGS="${NEW_CXXFLAGS}" |
324 | export CXXFLAGS="${NEW_CXXFLAGS}" |
| 239 | return 0 |
325 | return 0 |
| 240 | } |
326 | } |
| 241 | |
327 | |
|
|
328 | test-flag-PROG() { |
|
|
329 | local comp=$1 |
|
|
330 | local flags="$2" |
|
|
331 | |
|
|
332 | [[ -z ${comp} || -z ${flags} ]] && \ |
|
|
333 | return 1 |
|
|
334 | |
|
|
335 | local PROG=$(tc-get${comp}) |
|
|
336 | ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ |
|
|
337 | > /dev/null 2>&1 |
|
|
338 | } |
|
|
339 | |
|
|
340 | # @FUNCTION: test-flag-CC |
|
|
341 | # @USAGE: <flag> |
|
|
342 | # @DESCRIPTION: |
|
|
343 | # Returns shell true if <flag> is supported by the C compiler, else returns shell false. |
|
|
344 | test-flag-CC() { test-flag-PROG "CC" "$1"; } |
|
|
345 | |
|
|
346 | # @FUNCTION: test-flag-CXX |
|
|
347 | # @USAGE: <flag> |
|
|
348 | # @DESCRIPTION: |
|
|
349 | # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false. |
|
|
350 | test-flag-CXX() { test-flag-PROG "CXX" "$1"; } |
|
|
351 | |
|
|
352 | test-flags-PROG() { |
|
|
353 | local comp=$1 |
|
|
354 | local flags |
|
|
355 | local x |
|
|
356 | |
|
|
357 | shift |
|
|
358 | |
|
|
359 | [[ -z ${comp} ]] && return 1 |
|
|
360 | |
|
|
361 | x="" |
|
|
362 | for x in "$@" ; do |
|
|
363 | test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" |
|
|
364 | done |
|
|
365 | |
|
|
366 | echo "${flags}" |
|
|
367 | |
|
|
368 | # Just bail if we dont have any flags |
|
|
369 | [[ -n ${flags} ]] |
|
|
370 | } |
|
|
371 | |
|
|
372 | # @FUNCTION: test-flags-CC |
|
|
373 | # @USAGE: <flags> |
|
|
374 | # @DESCRIPTION: |
|
|
375 | # Returns shell true if <flags> are supported by the C compiler, else returns shell false. |
|
|
376 | test-flags-CC() { test-flags-PROG "CC" "$@"; } |
|
|
377 | |
|
|
378 | # @FUNCTION: test-flags-CXX |
|
|
379 | # @USAGE: <flags> |
|
|
380 | # @DESCRIPTION: |
|
|
381 | # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false. |
|
|
382 | test-flags-CXX() { test-flags-PROG "CXX" "$@"; } |
|
|
383 | |
|
|
384 | # @FUNCTION: test-flags |
|
|
385 | # @USAGE: <flags> |
|
|
386 | # @DESCRIPTION: |
|
|
387 | # Short-hand that should hopefully work for both C and C++ compiler, but |
|
|
388 | # its really only present due to the append-flags() abomination. |
|
|
389 | test-flags() { test-flags-CC "$@"; } |
|
|
390 | |
|
|
391 | # @FUNCTION: test_flag |
|
|
392 | # @DESCRIPTION: |
|
|
393 | # DEPRICIATED, use test-flags() |
| 242 | test_flag() { |
394 | test_flag() { |
| 243 | local cc=${CC:-gcc} ; cc=${cc%% *} |
395 | ewarn "test_flag: deprecated, please use test-flags()!" >&2 |
| 244 | if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then |
|
|
| 245 | printf "%s\n" "$*" |
|
|
| 246 | return 0 |
|
|
| 247 | fi |
|
|
| 248 | return 1 |
|
|
| 249 | } |
|
|
| 250 | |
396 | |
|
|
397 | test-flags-CC "$@" |
|
|
398 | } |
|
|
399 | |
|
|
400 | # @FUNCTION: test_version_info |
|
|
401 | # @USAGE: <version> |
|
|
402 | # @DESCRIPTION: |
|
|
403 | # Returns shell true if the current C compiler version matches <version>, else returns shell false. |
|
|
404 | # Accepts shell globs. |
| 251 | test_version_info() { |
405 | test_version_info() { |
| 252 | local cc=${CC:-gcc} ; cc=${cc%% *} |
|
|
| 253 | if [[ $(${cc} --version 2>&1) == *$1* ]]; then |
406 | if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then |
| 254 | return 0 |
407 | return 0 |
| 255 | else |
408 | else |
| 256 | return 1 |
409 | return 1 |
| 257 | fi |
410 | fi |
| 258 | } |
411 | } |
| 259 | |
412 | |
|
|
413 | # @FUNCTION: strip-unsupported-flags |
|
|
414 | # @DESCRIPTION: |
|
|
415 | # Strip C[XX]FLAGS of any flags not supported by the active toolchain. |
| 260 | strip-unsupported-flags() { |
416 | strip-unsupported-flags() { |
| 261 | local NEW_CFLAGS NEW_CXXFLAGS |
417 | export CFLAGS=$(test-flags-CC ${CFLAGS}) |
| 262 | |
418 | export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) |
| 263 | for x in ${CFLAGS} ; do |
|
|
| 264 | NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" |
|
|
| 265 | done |
|
|
| 266 | for x in ${CXXFLAGS} ; do |
|
|
| 267 | NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`" |
|
|
| 268 | done |
|
|
| 269 | |
|
|
| 270 | export CFLAGS="${NEW_CFLAGS}" |
|
|
| 271 | export CXXFLAGS="${NEW_CXXFLAGS}" |
|
|
| 272 | } |
419 | } |
| 273 | |
420 | |
|
|
421 | # @FUNCTION: get-flag |
|
|
422 | # @USAGE: <flag> |
|
|
423 | # @DESCRIPTION: |
|
|
424 | # Find and echo the value for a particular flag. Accepts shell globs. |
| 274 | get-flag() { |
425 | get-flag() { |
| 275 | local f findflag="$1" |
426 | local f findflag="$1" |
| 276 | |
427 | |
| 277 | # this code looks a little flaky but seems to work for |
428 | # this code looks a little flaky but seems to work for |
| 278 | # everything we want ... |
429 | # everything we want ... |
| … | |
… | |
| 286 | fi |
437 | fi |
| 287 | done |
438 | done |
| 288 | return 1 |
439 | return 1 |
| 289 | } |
440 | } |
| 290 | |
441 | |
|
|
442 | # @FUNCTION: has_hardened |
|
|
443 | # @DESCRIPTION: |
|
|
444 | # DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs |
| 291 | has_hardened() { |
445 | has_hardened() { |
|
|
446 | ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 |
|
|
447 | |
| 292 | test_version_info Hardened |
448 | test_version_info Hardened && return 0 |
| 293 | return $? |
449 | # The specs file wont exist unless gcc has GCC_SPECS support |
|
|
450 | [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] |
| 294 | } |
451 | } |
| 295 | |
452 | |
|
|
453 | # @FUNCTION: has_pic |
|
|
454 | # @DESCRIPTION: |
|
|
455 | # DEPRECATED - use gcc-specs-pie from toolchain-funcs |
|
|
456 | # indicate whether PIC is set |
| 296 | has_pic() { |
457 | has_pic() { |
| 297 | [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 |
458 | ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 |
| 298 | [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 |
|
|
| 299 | test_version_info pie && return 0 |
|
|
| 300 | return 1 |
|
|
| 301 | } |
|
|
| 302 | |
459 | |
|
|
460 | [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ |
|
|
461 | ${CFLAGS/-fpic} != ${CFLAGS} ]] || \ |
|
|
462 | gcc-specs-pie |
|
|
463 | } |
|
|
464 | |
|
|
465 | # @FUNCTION: has_pie |
|
|
466 | # @DESCRIPTION: |
|
|
467 | # DEPRECATED - use gcc-specs-pie from toolchain-funcs |
|
|
468 | # indicate whether PIE is set |
| 303 | has_pie() { |
469 | has_pie() { |
| 304 | [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 |
470 | ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 |
| 305 | [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 |
471 | |
| 306 | test_version_info pie && return 0 |
472 | [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ |
| 307 | return 1 |
473 | ${CFLAGS/-fpie} != ${CFLAGS} ]] || \ |
|
|
474 | gcc-specs-pie |
| 308 | } |
475 | } |
| 309 | |
476 | |
|
|
477 | # @FUNCTION: has_ssp_all |
|
|
478 | # @DESCRIPTION: |
|
|
479 | # DEPRECATED - use gcc-specs-ssp from toolchain-funcs |
|
|
480 | # indicate whether code for SSP is being generated for all functions |
|
|
481 | has_ssp_all() { |
|
|
482 | ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 |
|
|
483 | |
|
|
484 | # note; this matches only -fstack-protector-all |
|
|
485 | [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ |
|
|
486 | -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ |
|
|
487 | gcc-specs-ssp-all |
|
|
488 | } |
|
|
489 | |
|
|
490 | # @FUNCTION: has_ssp |
|
|
491 | # @DESCRIPTION: |
|
|
492 | # DEPRECATED - use gcc-specs-ssp from toolchain-funcs |
|
|
493 | # indicate whether code for SSP is being generated |
| 310 | has_ssp() { |
494 | has_ssp() { |
|
|
495 | ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 |
|
|
496 | |
|
|
497 | # note; this matches both -fstack-protector and -fstack-protector-all |
| 311 | [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 |
498 | [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ |
| 312 | test_version_info ssp && return 0 |
499 | -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ |
| 313 | return 1 |
500 | gcc-specs-ssp |
| 314 | } |
501 | } |
| 315 | |
502 | |
|
|
503 | # @FUNCTION: has_m64 |
|
|
504 | # @DESCRIPTION: |
|
|
505 | # This doesn't test if the flag is accepted, it tests if the flag actually |
|
|
506 | # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works |
|
|
507 | # return code is 0, else the return code is 1. |
| 316 | has_m64() { |
508 | has_m64() { |
| 317 | # this doesnt test if the flag is accepted, it tests if the flag |
509 | # this doesnt test if the flag is accepted, it tests if the flag |
| 318 | # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! |
510 | # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! |
| 319 | # please dont replace this function with test_flag in some future |
511 | # please dont replace this function with test_flag in some future |
| 320 | # clean-up! |
512 | # clean-up! |
| 321 | temp=`mktemp` |
513 | |
|
|
514 | local temp="$(emktemp)" |
| 322 | echo "int main() { return(0); }" > ${temp}.c |
515 | echo "int main() { return(0); }" > "${temp}".c |
| 323 | ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 |
516 | MY_CC=$(tc-getCC) |
| 324 | ret=$? |
517 | ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 |
|
|
518 | local ret=$? |
| 325 | rm -f ${temp}.c |
519 | rm -f "${temp}".c |
| 326 | [ "$ret" != "1" ] && return 0 |
520 | [[ ${ret} != 1 ]] && return 0 |
| 327 | return 1 |
521 | return 1 |
| 328 | } |
522 | } |
| 329 | |
523 | |
|
|
524 | # @FUNCTION: has_m32 |
|
|
525 | # @DESCRIPTION: |
|
|
526 | # This doesn't test if the flag is accepted, it tests if the flag actually |
|
|
527 | # WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return |
|
|
528 | # code is 0, else return code is 1. |
| 330 | has_m32() { |
529 | has_m32() { |
| 331 | # this doesnt test if the flag is accepted, it tests if the flag |
530 | # this doesnt test if the flag is accepted, it tests if the flag |
| 332 | # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! |
531 | # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! |
| 333 | # please dont replace this function with test_flag in some future |
532 | # please dont replace this function with test_flag in some future |
| 334 | # clean-up! |
533 | # clean-up! |
| 335 | temp=`mktemp` |
534 | |
|
|
535 | [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0 |
|
|
536 | |
|
|
537 | local temp=$(emktemp) |
| 336 | echo "int main() { return(0); }" > ${temp}.c |
538 | echo "int main() { return(0); }" > "${temp}".c |
| 337 | ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 |
539 | MY_CC=$(tc-getCC) |
| 338 | ret=$? |
540 | ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 |
|
|
541 | local ret=$? |
| 339 | rm -f ${temp}.c |
542 | rm -f "${temp}".c |
| 340 | [ "$ret" != "1" ] && return 0 |
543 | [[ ${ret} != 1 ]] && return 0 |
| 341 | return 1 |
544 | return 1 |
| 342 | } |
545 | } |
| 343 | |
546 | |
|
|
547 | # @FUNCTION: replace-sparc64-flags |
|
|
548 | # @DESCRIPTION: |
|
|
549 | # Sets mcpu to v8 and uses the original value as mtune if none specified. |
| 344 | replace-sparc64-flags() { |
550 | replace-sparc64-flags() { |
| 345 | local SPARC64_CPUS="ultrasparc v9" |
551 | local SPARC64_CPUS="ultrasparc3 ultrasparc v9" |
| 346 | |
552 | |
| 347 | if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then |
553 | if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then |
| 348 | for x in ${SPARC64_CPUS}; do |
554 | for x in ${SPARC64_CPUS}; do |
| 349 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" |
555 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" |
| 350 | done |
556 | done |
| 351 | else |
557 | else |
| 352 | for x in ${SPARC64_CPUS}; do |
558 | for x in ${SPARC64_CPUS}; do |
| 353 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
559 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
| 354 | done |
560 | done |
| 355 | fi |
561 | fi |
| 356 | |
562 | |
| 357 | if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then |
563 | if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then |
| 358 | for x in ${SPARC64_CPUS}; do |
564 | for x in ${SPARC64_CPUS}; do |
| 359 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" |
565 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" |
| 360 | done |
566 | done |
| 361 | else |
567 | else |
| 362 | for x in ${SPARC64_CPUS}; do |
568 | for x in ${SPARC64_CPUS}; do |
| 363 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
569 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
| 364 | done |
570 | done |
| 365 | fi |
571 | fi |
| 366 | |
572 | |
| 367 | export CFLAGS CXXFLAGS |
573 | export CFLAGS CXXFLAGS |
| 368 | } |
574 | } |
| 369 | |
575 | |
|
|
576 | # @FUNCTION: append-ldflags |
|
|
577 | # @USAGE: <flags> |
|
|
578 | # @DESCRIPTION: |
|
|
579 | # Add extra <flags> to the current LDFLAGS. |
| 370 | append-ldflags() { |
580 | append-ldflags() { |
|
|
581 | [[ -z $* ]] && return 0 |
|
|
582 | local flag |
|
|
583 | for flag in "$@"; do |
|
|
584 | [[ ${flag} == -l* ]] && \ |
|
|
585 | ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" |
|
|
586 | done |
|
|
587 | |
| 371 | export LDFLAGS="${LDFLAGS} $*" |
588 | export LDFLAGS="${LDFLAGS} $*" |
| 372 | return 0 |
589 | return 0 |
| 373 | } |
590 | } |
| 374 | |
591 | |
|
|
592 | # @FUNCTION: filter-ldflags |
|
|
593 | # @USAGE: <flags> |
|
|
594 | # @DESCRIPTION: |
|
|
595 | # Remove particular <flags> from LDFLAGS. Accepts shell globs. |
| 375 | filter-ldflags() { |
596 | filter-ldflags() { |
| 376 | local x |
597 | _filter-var LDFLAGS "$@" |
|
|
598 | return 0 |
|
|
599 | } |
| 377 | |
600 | |
| 378 | # we do this fancy spacing stuff so as to not filter |
601 | # @FUNCTION: raw-ldflags |
| 379 | # out part of a flag ... we want flag atoms ! :D |
602 | # @USAGE: <flags> |
| 380 | LDFLAGS=" ${LDFLAGS} " |
603 | # @DESCRIPTION: |
|
|
604 | # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results |
|
|
605 | # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed |
|
|
606 | # to gcc where it needs the '-Wl,'. |
|
|
607 | raw-ldflags() { |
|
|
608 | local x input="$@" |
|
|
609 | [[ -z ${input} ]] && input=${LDFLAGS} |
|
|
610 | set -- |
| 381 | for x in "$@" ; do |
611 | for x in ${input} ; do |
| 382 | LDFLAGS="${LDFLAGS// ${x} / }" |
612 | x=${x#-Wl,} |
|
|
613 | set -- "$@" ${x//,/ } |
| 383 | done |
614 | done |
| 384 | LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" |
615 | echo "$@" |
| 385 | export LDFLAGS |
|
|
| 386 | return 0 |
|
|
| 387 | } |
616 | } |
| 388 | |
617 | |
| 389 | etexec-flags() { |
618 | # @FUNCTION: bindnow-flags |
| 390 | # if you're not using a hardened compiler you wont need this |
619 | # @RETURN: Returns the flags to enable "now" binding in the current selected linker. |
| 391 | # PIC/no-pic kludge in the first place. |
620 | # @DESCRIPTION: |
| 392 | has_hardened || return 0 |
621 | # DEPRECATED - Gets the flags needed for "NOW" binding |
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|
622 | bindnow-flags() { |
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623 | ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" >&2 |
| 393 | |
624 | |
| 394 | if has_pie || has_pic; then |
625 | case $($(tc-getLD) -v 2>&1 </dev/null) in |
| 395 | [ -z "`is-flag -fno-pic`" ] && |
626 | *GNU* | *'with BFD'*) # GNU ld |
| 396 | export CFLAGS="${CFLAGS} `test_flag -fno-pic`" |
627 | echo "-Wl,-z,now" ;; |
| 397 | [ -z "`is-flag -nopie`" ] && |
628 | *Apple*) # Darwin ld |
| 398 | export CFLAGS="${CFLAGS} `test_flag -nopie`" |
629 | echo "-bind_at_load" ;; |
| 399 | fi |
630 | *) |
| 400 | return 0 |
631 | # Some linkers just recognize -V instead of -v |
|
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632 | case $($(tc-getLD) -V 2>&1 </dev/null) in |
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633 | *Solaris*) # Solaris accept almost the same GNU options |
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634 | echo "-Wl,-z,now" ;; |
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635 | esac |
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636 | ;; |
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637 | esac |
| 401 | } |
638 | } |
| 402 | |
639 | |
| 403 | fstack-flags() { |
640 | |
| 404 | if has_ssp; then |
641 | # Some tests for when we screw with things and want to make |
| 405 | [ -z "`is-flag -fno-stack-protector`" ] && |
642 | # sure we didn't break anything |
| 406 | export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" |
643 | #TESTS() { |
| 407 | fi |
644 | # CFLAGS="-a -b -c=1" |
| 408 | return 0 |
645 | # CXXFLAGS="-x -y -z=2" |
| 409 | } |
646 | # LDFLAGS="-l -m -n=3" |
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647 | # |
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648 | # die() { exit 1; } |
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649 | # (is-flag 1 2 3) && die |
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650 | # (is-ldflag 1 2 3) && die |
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651 | # |
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652 | # is-flagq -l && die |
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653 | # is-ldflagq -a && die |
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654 | # is-flagq -a || die |
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655 | # is-flagq -x || die |
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656 | # is-ldflagq -n=* || die |
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657 | # is-ldflagq -n && die |
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658 | # |
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659 | # strip-unsupported-flags |
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660 | # [[ ${CFLAGS} == "-c=1" ]] || die |
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661 | # [[ ${CXXFLAGS} == "-y -z=2" ]] || die |
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662 | # |
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663 | # echo "All tests pass" |
|
|
664 | #} |
|
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665 | #TESTS |
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