| 1 | # Copyright 1999-2004 Gentoo Foundation |
1 | # Copyright 1999-2011 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 1.168 2012/01/16 20:03:32 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 $ECLASS" |
6 | # @MAINTAINER: |
| 9 | IUSE="$IUSE debug" |
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. |
| 10 | |
12 | |
| 11 | # |
13 | if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then |
| 12 | #### filter-flags <flags> #### |
14 | ___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank" |
| 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 | |
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,F,FC,LD}FLAGS |
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21 | } |
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22 | |
| 70 | # C[XX]FLAGS that we allow in strip-flags |
23 | # {C,CXX,F,FC}FLAGS that we allow in strip-flags |
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24 | # Note: shell globs and character lists are allowed |
| 71 | setup-allowed-flags() { |
25 | setup-allowed-flags() { |
| 72 | if [ -z "${ALLOWED_FLAGS}" ] ; then |
26 | ALLOWED_FLAGS="-pipe" |
| 73 | export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" |
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 -D* -U*" |
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49 | |
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50 | # 4.5 |
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51 | ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp" |
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52 | # 4.6 |
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53 | ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm" |
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54 | |
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55 | export ALLOWED_FLAGS |
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56 | return 0 |
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57 | } |
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58 | |
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59 | # inverted filters for hardened compiler. This is trying to unpick |
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60 | # the hardened compiler defaults. |
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61 | _filter-hardened() { |
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62 | local f |
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63 | for f in "$@" ; do |
| 74 | case "${ARCH}" in |
64 | case "${f}" in |
| 75 | mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; |
65 | # Ideally we should only concern ourselves with PIE flags, |
| 76 | amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; |
66 | # not -fPIC or -fpic, but too many places filter -fPIC without |
| 77 | x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; |
67 | # thinking about -fPIE. |
| 78 | alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; |
68 | -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) |
| 79 | ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; |
69 | gcc-specs-pie || continue |
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70 | is-flagq -nopie || append-flags -nopie;; |
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71 | -fstack-protector) |
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72 | gcc-specs-ssp || continue |
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73 | is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);; |
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74 | -fstack-protector-all) |
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75 | gcc-specs-ssp-to-all || continue |
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76 | is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);; |
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77 | -fno-strict-overflow) |
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78 | gcc-specs-nostrict || continue |
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79 | is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);; |
| 80 | esac |
80 | esac |
| 81 | fi |
81 | done |
| 82 | |
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| 83 | # C[XX]FLAGS that we are think is ok, but needs testing |
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| 84 | # NOTE: currently -Os have issues with gcc3 and K6* arch's |
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| 85 | export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" |
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| 86 | return 0 |
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| 87 | } |
82 | } |
| 88 | |
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=$1 new=() |
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89 | shift |
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90 | |
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91 | for f in ${!var} ; do |
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92 | for x in "$@" ; do |
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93 | # Note this should work with globs like -O* |
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94 | [[ ${f} == ${x} ]] && continue 2 |
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95 | done |
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96 | new+=( "${f}" ) |
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97 | done |
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98 | eval export ${var}=\""${new[*]}"\" |
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99 | } |
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100 | |
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101 | # @FUNCTION: filter-flags |
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102 | # @USAGE: <flags> |
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103 | # @DESCRIPTION: |
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104 | # Remove particular <flags> from {C,CPP,CXX,F,FC,LD}FLAGS. Accepts shell globs. |
| 89 | filter-flags() { |
105 | filter-flags() { |
| 90 | local x f fset |
106 | _filter-hardened "$@" |
| 91 | declare -a new_CFLAGS new_CXXFLAGS |
107 | local v |
| 92 | |
108 | for v in $(all-flag-vars) ; do |
| 93 | for x in "$@" ; do |
109 | _filter-var ${v} "$@" |
| 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 |
110 | done |
| 108 | eval export ${fset}=\${new_${fset}\[*]} |
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| 109 | done |
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| 110 | |
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| 111 | return 0 |
111 | return 0 |
| 112 | } |
112 | } |
| 113 | |
113 | |
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114 | # @FUNCTION: filter-lfs-flags |
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115 | # @DESCRIPTION: |
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116 | # Remove flags that enable Large File Support. |
| 114 | filter-lfs-flags() { |
117 | filter-lfs-flags() { |
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118 | [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments" |
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119 | # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html |
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120 | # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...) |
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121 | # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...) |
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122 | # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t) |
| 115 | filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
123 | filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
| 116 | } |
124 | } |
| 117 | |
125 | |
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126 | # @FUNCTION: append-cppflags |
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127 | # @USAGE: <flags> |
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128 | # @DESCRIPTION: |
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129 | # Add extra <flags> to the current CPPFLAGS. |
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130 | append-cppflags() { |
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131 | [[ $# -eq 0 ]] && return 0 |
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132 | export CPPFLAGS="${CPPFLAGS} $*" |
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133 | return 0 |
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134 | } |
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135 | |
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136 | # @FUNCTION: append-cflags |
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137 | # @USAGE: <flags> |
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138 | # @DESCRIPTION: |
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139 | # Add extra <flags> to the current CFLAGS. |
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140 | append-cflags() { |
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141 | [[ $# -eq 0 ]] && return 0 |
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142 | export CFLAGS=$(test-flags-CC ${CFLAGS} "$@") |
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143 | return 0 |
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144 | } |
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145 | |
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146 | # @FUNCTION: append-cxxflags |
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147 | # @USAGE: <flags> |
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148 | # @DESCRIPTION: |
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149 | # Add extra <flags> to the current CXXFLAGS. |
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150 | append-cxxflags() { |
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151 | [[ $# -eq 0 ]] && return 0 |
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152 | export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@") |
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153 | return 0 |
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154 | } |
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155 | |
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156 | # @FUNCTION: append-fflags |
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157 | # @USAGE: <flags> |
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158 | # @DESCRIPTION: |
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159 | # Add extra <flags> to the current {F,FC}FLAGS. |
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160 | append-fflags() { |
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161 | [[ $# -eq 0 ]] && return 0 |
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162 | export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@") |
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163 | export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@") |
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164 | return 0 |
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165 | } |
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166 | |
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167 | # @FUNCTION: append-lfs-flags |
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168 | # @DESCRIPTION: |
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169 | # Add flags that enable Large File Support. |
| 118 | append-lfs-flags() { |
170 | append-lfs-flags() { |
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171 | [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments" |
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172 | # see comments in filter-lfs-flags func for meaning of these |
| 119 | append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
173 | append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
| 120 | } |
174 | } |
| 121 | |
175 | |
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176 | # @FUNCTION: append-flags |
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177 | # @USAGE: <flags> |
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178 | # @DESCRIPTION: |
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179 | # Add extra <flags> to your current {C,CXX,F,FC}FLAGS. |
| 122 | append-flags() { |
180 | append-flags() { |
| 123 | export CFLAGS="${CFLAGS} $*" |
181 | [[ $# -eq 0 ]] && return 0 |
| 124 | export CXXFLAGS="${CXXFLAGS} $*" |
182 | append-cflags "$@" |
| 125 | [ -n "`is-flag -fno-stack-protector`" -o \ |
183 | append-cxxflags "$@" |
| 126 | -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags |
184 | append-fflags "$@" |
| 127 | return 0 |
185 | return 0 |
| 128 | } |
186 | } |
| 129 | |
187 | |
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188 | # @FUNCTION: replace-flags |
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189 | # @USAGE: <old> <new> |
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190 | # @DESCRIPTION: |
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191 | # Replace the <old> flag with <new>. Accepts shell globs for <old>. |
| 130 | replace-flags() { |
192 | replace-flags() { |
| 131 | # we do this fancy spacing stuff so as to not filter |
193 | [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>" |
| 132 | # out part of a flag ... we want flag atoms ! :D |
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| 133 | CFLAGS=" ${CFLAGS} " |
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| 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 | |
194 | |
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195 | local f var new |
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196 | for var in $(all-flag-vars) ; do |
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197 | # Looping over the flags instead of using a global |
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198 | # substitution ensures that we're working with flag atoms. |
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199 | # Otherwise globs like -O* have the potential to wipe out the |
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200 | # list of flags. |
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201 | new=() |
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202 | for f in ${!var} ; do |
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203 | # Note this should work with globs like -O* |
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204 | [[ ${f} == ${1} ]] && f=${2} |
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205 | new+=( "${f}" ) |
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206 | done |
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207 | eval export ${var}=\""${new[*]}"\" |
|
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208 | done |
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209 | |
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210 | return 0 |
|
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211 | } |
|
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212 | |
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213 | # @FUNCTION: replace-cpu-flags |
|
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214 | # @USAGE: <old> <new> |
|
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215 | # @DESCRIPTION: |
|
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216 | # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu |
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217 | # with flags that select the <new> cpu. Accepts shell globs for <old>. |
| 143 | replace-cpu-flags() { |
218 | replace-cpu-flags() { |
| 144 | local oldcpu newcpu="$1" ; shift |
219 | local newcpu="$#" ; newcpu="${!newcpu}" |
| 145 | for oldcpu in "$@" ; do |
220 | while [ $# -gt 1 ] ; do |
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221 | # quote to make sure that no globbing is done (particularly on |
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222 | # ${oldcpu}) prior to calling replace-flags |
| 146 | replace-flags -march=${oldcpu} -march=${newcpu} |
223 | replace-flags "-march=${1}" "-march=${newcpu}" |
| 147 | replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} |
224 | replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" |
| 148 | replace-flags -mtune=${oldcpu} -mtune=${newcpu} |
225 | replace-flags "-mtune=${1}" "-mtune=${newcpu}" |
|
|
226 | shift |
| 149 | done |
227 | done |
|
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228 | return 0 |
|
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229 | } |
|
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230 | |
|
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231 | _is_flagq() { |
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232 | local x |
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233 | for x in ${!1} ; do |
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234 | [[ ${x} == $2 ]] && return 0 |
|
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235 | done |
| 150 | return 0 |
236 | return 1 |
| 151 | } |
237 | } |
| 152 | |
238 | |
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239 | # @FUNCTION: is-flagq |
|
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240 | # @USAGE: <flag> |
|
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241 | # @DESCRIPTION: |
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242 | # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs. |
|
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243 | is-flagq() { |
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244 | [[ -n $2 ]] && die "Usage: is-flag <flag>" |
|
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245 | |
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246 | local var |
|
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247 | for var in $(all-flag-vars) ; do |
|
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248 | _is_flagq ${var} "$1" && return 0 |
|
|
249 | done |
|
|
250 | return 1 |
|
|
251 | } |
|
|
252 | |
|
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253 | # @FUNCTION: is-flag |
|
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254 | # @USAGE: <flag> |
|
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255 | # @DESCRIPTION: |
|
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256 | # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs. |
| 153 | is-flag() { |
257 | is-flag() { |
| 154 | local x |
258 | is-flagq "$@" && 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 | } |
259 | } |
| 164 | |
260 | |
|
|
261 | # @FUNCTION: is-ldflagq |
|
|
262 | # @USAGE: <flag> |
|
|
263 | # @DESCRIPTION: |
|
|
264 | # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs. |
|
|
265 | is-ldflagq() { |
|
|
266 | [[ -n $2 ]] && die "Usage: is-ldflag <flag>" |
|
|
267 | _is_flagq LDFLAGS $1 |
|
|
268 | } |
|
|
269 | |
|
|
270 | # @FUNCTION: is-ldflag |
|
|
271 | # @USAGE: <flag> |
|
|
272 | # @DESCRIPTION: |
|
|
273 | # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs. |
|
|
274 | is-ldflag() { |
|
|
275 | is-ldflagq "$@" && echo true |
|
|
276 | } |
|
|
277 | |
|
|
278 | # @FUNCTION: filter-mfpmath |
|
|
279 | # @USAGE: <math types> |
|
|
280 | # @DESCRIPTION: |
|
|
281 | # Remove specified math types from the fpmath flag. For example, if the user |
|
|
282 | # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with |
|
|
283 | # -mfpmath=386. |
| 165 | filter-mfpmath() { |
284 | filter-mfpmath() { |
| 166 | local orig_mfpmath new_math prune_math |
285 | local orig_mfpmath new_math prune_math |
| 167 | |
286 | |
| 168 | # save the original -mfpmath flag |
287 | # save the original -mfpmath flag |
| 169 | orig_mfpmath="`get-flag -mfpmath`" |
288 | orig_mfpmath=$(get-flag -mfpmath) |
| 170 | # get the value of the current -mfpmath flag |
289 | # get the value of the current -mfpmath flag |
| 171 | new_math=" `get-flag mfpmath | tr , ' '` " |
290 | new_math=$(get-flag mfpmath) |
|
|
291 | new_math=" ${new_math//,/ } " |
| 172 | # figure out which math values are to be removed |
292 | # figure out which math values are to be removed |
| 173 | prune_math="" |
293 | prune_math="" |
| 174 | for prune_math in "$@" ; do |
294 | for prune_math in "$@" ; do |
| 175 | new_math="${new_math/ ${prune_math} / }" |
295 | new_math=${new_math/ ${prune_math} / } |
| 176 | done |
296 | done |
| 177 | new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" |
297 | new_math=$(echo ${new_math}) |
|
|
298 | new_math=${new_math// /,} |
| 178 | |
299 | |
| 179 | if [ -z "${new_math}" ] ; then |
300 | if [[ -z ${new_math} ]] ; then |
| 180 | # if we're removing all user specified math values are |
301 | # if we're removing all user specified math values are |
| 181 | # slated for removal, then we just filter the flag |
302 | # slated for removal, then we just filter the flag |
| 182 | filter-flags ${orig_mfpmath} |
303 | filter-flags ${orig_mfpmath} |
| 183 | else |
304 | else |
| 184 | # if we only want to filter some of the user specified |
305 | # if we only want to filter some of the user specified |
| … | |
… | |
| 186 | replace-flags ${orig_mfpmath} -mfpmath=${new_math} |
307 | replace-flags ${orig_mfpmath} -mfpmath=${new_math} |
| 187 | fi |
308 | fi |
| 188 | return 0 |
309 | return 0 |
| 189 | } |
310 | } |
| 190 | |
311 | |
|
|
312 | # @FUNCTION: strip-flags |
|
|
313 | # @DESCRIPTION: |
|
|
314 | # Strip C[XX]FLAGS of everything except known good/safe flags. |
| 191 | strip-flags() { |
315 | strip-flags() { |
| 192 | local x y flag NEW_CFLAGS NEW_CXXFLAGS |
316 | local x y var |
| 193 | |
317 | |
| 194 | setup-allowed-flags |
318 | setup-allowed-flags |
| 195 | |
319 | |
| 196 | local NEW_CFLAGS="" |
|
|
| 197 | local NEW_CXXFLAGS="" |
|
|
| 198 | |
|
|
| 199 | # Allow unstable C[XX]FLAGS if we are using unstable profile ... |
|
|
| 200 | if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then |
|
|
| 201 | use debug && einfo "Enabling the use of some unstable flags" |
|
|
| 202 | ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" |
|
|
| 203 | fi |
|
|
| 204 | |
|
|
| 205 | set -f # disable pathname expansion |
320 | set -f # disable pathname expansion |
| 206 | |
321 | |
| 207 | for x in ${CFLAGS}; do |
322 | for var in $(all-flag-vars) ; do |
|
|
323 | local new=() |
|
|
324 | |
|
|
325 | for x in ${!var} ; do |
|
|
326 | local flag=${x%%=*} |
| 208 | for y in ${ALLOWED_FLAGS}; do |
327 | for y in ${ALLOWED_FLAGS} ; do |
| 209 | flag=${x%%=*} |
|
|
| 210 | if [ "${flag%%${y}}" = "" ]; then |
328 | if [[ -z ${flag%%${y}} ]] ; then |
| 211 | NEW_CFLAGS="${NEW_CFLAGS} ${x}" |
329 | new+=( "${x}" ) |
| 212 | break |
330 | break |
| 213 | fi |
331 | fi |
| 214 | done |
332 | done |
| 215 | done |
333 | done |
| 216 | |
334 | |
| 217 | for x in ${CXXFLAGS}; do |
|
|
| 218 | for y in ${ALLOWED_FLAGS}; do |
|
|
| 219 | flag=${x%%=*} |
|
|
| 220 | if [ "${flag%%${y}}" = "" ]; then |
|
|
| 221 | NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" |
|
|
| 222 | break |
|
|
| 223 | fi |
|
|
| 224 | done |
|
|
| 225 | done |
|
|
| 226 | |
|
|
| 227 | # In case we filtered out all optimization flags fallback to -O2 |
335 | # In case we filtered out all optimization flags fallback to -O2 |
| 228 | if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then |
336 | if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then |
| 229 | NEW_CFLAGS="${NEW_CFLAGS} -O2" |
337 | new+=( -O2 ) |
| 230 | fi |
338 | fi |
| 231 | if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then |
339 | |
| 232 | NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" |
340 | eval export ${var}=\""${new[*]}"\" |
| 233 | fi |
341 | done |
| 234 | |
342 | |
| 235 | set +f # re-enable pathname expansion |
343 | set +f # re-enable pathname expansion |
| 236 | |
344 | |
| 237 | export CFLAGS="${NEW_CFLAGS}" |
|
|
| 238 | export CXXFLAGS="${NEW_CXXFLAGS}" |
|
|
| 239 | return 0 |
|
|
| 240 | } |
|
|
| 241 | |
|
|
| 242 | test_flag() { |
|
|
| 243 | local cc=${CC:-gcc} ; cc=${cc%% *} |
|
|
| 244 | if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then |
|
|
| 245 | printf "%s\n" "$*" |
|
|
| 246 | return 0 |
345 | return 0 |
| 247 | fi |
|
|
| 248 | return 1 |
|
|
| 249 | } |
346 | } |
| 250 | |
347 | |
|
|
348 | test-flag-PROG() { |
|
|
349 | local comp=$1 |
|
|
350 | local flag=$2 |
|
|
351 | |
|
|
352 | [[ -z ${comp} || -z ${flag} ]] && return 1 |
|
|
353 | |
|
|
354 | # use -c so we can test the assembler as well |
|
|
355 | local PROG=$(tc-get${comp}) |
|
|
356 | ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \ |
|
|
357 | > /dev/null 2>&1 |
|
|
358 | } |
|
|
359 | |
|
|
360 | # @FUNCTION: test-flag-CC |
|
|
361 | # @USAGE: <flag> |
|
|
362 | # @DESCRIPTION: |
|
|
363 | # Returns shell true if <flag> is supported by the C compiler, else returns shell false. |
|
|
364 | test-flag-CC() { test-flag-PROG "CC" "$1"; } |
|
|
365 | |
|
|
366 | # @FUNCTION: test-flag-CXX |
|
|
367 | # @USAGE: <flag> |
|
|
368 | # @DESCRIPTION: |
|
|
369 | # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false. |
|
|
370 | test-flag-CXX() { test-flag-PROG "CXX" "$1"; } |
|
|
371 | |
|
|
372 | # @FUNCTION: test-flag-F77 |
|
|
373 | # @USAGE: <flag> |
|
|
374 | # @DESCRIPTION: |
|
|
375 | # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false. |
|
|
376 | test-flag-F77() { test-flag-PROG "F77" "$1"; } |
|
|
377 | |
|
|
378 | # @FUNCTION: test-flag-FC |
|
|
379 | # @USAGE: <flag> |
|
|
380 | # @DESCRIPTION: |
|
|
381 | # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false. |
|
|
382 | test-flag-FC() { test-flag-PROG "FC" "$1"; } |
|
|
383 | |
|
|
384 | test-flags-PROG() { |
|
|
385 | local comp=$1 |
|
|
386 | local flags |
|
|
387 | local x |
|
|
388 | |
|
|
389 | shift |
|
|
390 | |
|
|
391 | [[ -z ${comp} ]] && return 1 |
|
|
392 | |
|
|
393 | for x in "$@" ; do |
|
|
394 | test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" |
|
|
395 | done |
|
|
396 | |
|
|
397 | echo "${flags}" |
|
|
398 | |
|
|
399 | # Just bail if we dont have any flags |
|
|
400 | [[ -n ${flags} ]] |
|
|
401 | } |
|
|
402 | |
|
|
403 | # @FUNCTION: test-flags-CC |
|
|
404 | # @USAGE: <flags> |
|
|
405 | # @DESCRIPTION: |
|
|
406 | # Returns shell true if <flags> are supported by the C compiler, else returns shell false. |
|
|
407 | test-flags-CC() { test-flags-PROG "CC" "$@"; } |
|
|
408 | |
|
|
409 | # @FUNCTION: test-flags-CXX |
|
|
410 | # @USAGE: <flags> |
|
|
411 | # @DESCRIPTION: |
|
|
412 | # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false. |
|
|
413 | test-flags-CXX() { test-flags-PROG "CXX" "$@"; } |
|
|
414 | |
|
|
415 | # @FUNCTION: test-flags-F77 |
|
|
416 | # @USAGE: <flags> |
|
|
417 | # @DESCRIPTION: |
|
|
418 | # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false. |
|
|
419 | test-flags-F77() { test-flags-PROG "F77" "$@"; } |
|
|
420 | |
|
|
421 | # @FUNCTION: test-flags-FC |
|
|
422 | # @USAGE: <flags> |
|
|
423 | # @DESCRIPTION: |
|
|
424 | # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false. |
|
|
425 | test-flags-FC() { test-flags-PROG "FC" "$@"; } |
|
|
426 | |
|
|
427 | # @FUNCTION: test-flags |
|
|
428 | # @USAGE: <flags> |
|
|
429 | # @DESCRIPTION: |
|
|
430 | # Short-hand that should hopefully work for both C and C++ compiler, but |
|
|
431 | # its really only present due to the append-flags() abomination. |
|
|
432 | test-flags() { test-flags-CC "$@"; } |
|
|
433 | |
|
|
434 | # @FUNCTION: test_version_info |
|
|
435 | # @USAGE: <version> |
|
|
436 | # @DESCRIPTION: |
|
|
437 | # Returns shell true if the current C compiler version matches <version>, else returns shell false. |
|
|
438 | # Accepts shell globs. |
| 251 | test_version_info() { |
439 | test_version_info() { |
| 252 | local cc=${CC:-gcc} ; cc=${cc%% *} |
|
|
| 253 | if [[ $(${cc} --version 2>&1) == *$1* ]]; then |
440 | if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then |
| 254 | return 0 |
441 | return 0 |
| 255 | else |
442 | else |
| 256 | return 1 |
443 | return 1 |
| 257 | fi |
444 | fi |
| 258 | } |
445 | } |
| 259 | |
446 | |
|
|
447 | # @FUNCTION: strip-unsupported-flags |
|
|
448 | # @DESCRIPTION: |
|
|
449 | # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain. |
| 260 | strip-unsupported-flags() { |
450 | strip-unsupported-flags() { |
| 261 | local NEW_CFLAGS NEW_CXXFLAGS |
451 | export CFLAGS=$(test-flags-CC ${CFLAGS}) |
| 262 | |
452 | export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) |
| 263 | for x in ${CFLAGS} ; do |
453 | export FFLAGS=$(test-flags-F77 ${FFLAGS}) |
| 264 | NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" |
454 | export FCFLAGS=$(test-flags-FC ${FCFLAGS}) |
| 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 | } |
455 | } |
| 273 | |
456 | |
|
|
457 | # @FUNCTION: get-flag |
|
|
458 | # @USAGE: <flag> |
|
|
459 | # @DESCRIPTION: |
|
|
460 | # Find and echo the value for a particular flag. Accepts shell globs. |
| 274 | get-flag() { |
461 | get-flag() { |
| 275 | local f findflag="$1" |
462 | local f var findflag="$1" |
| 276 | |
463 | |
| 277 | # this code looks a little flaky but seems to work for |
464 | # this code looks a little flaky but seems to work for |
| 278 | # everything we want ... |
465 | # everything we want ... |
| 279 | # for example, if CFLAGS="-march=i686": |
466 | # for example, if CFLAGS="-march=i686": |
| 280 | # `get-flag -march` == "-march=i686" |
467 | # `get-flag -march` == "-march=i686" |
| 281 | # `get-flag march` == "i686" |
468 | # `get-flag march` == "i686" |
| 282 | for f in ${CFLAGS} ${CXXFLAGS} ; do |
469 | for var in $(all-flag-vars) ; do |
|
|
470 | for f in ${!var} ; do |
| 283 | if [ "${f/${findflag}}" != "${f}" ] ; then |
471 | if [ "${f/${findflag}}" != "${f}" ] ; then |
| 284 | printf "%s\n" "${f/-${findflag}=}" |
472 | printf "%s\n" "${f/-${findflag}=}" |
| 285 | return 0 |
473 | return 0 |
| 286 | fi |
474 | fi |
|
|
475 | done |
| 287 | done |
476 | done |
| 288 | return 1 |
477 | return 1 |
| 289 | } |
478 | } |
| 290 | |
479 | |
| 291 | has_hardened() { |
480 | # @FUNCTION: has_m64 |
| 292 | test_version_info Hardened |
481 | # @DESCRIPTION: |
| 293 | return $? |
482 | # This doesn't test if the flag is accepted, it tests if the flag actually |
| 294 | } |
483 | # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works |
| 295 | |
484 | # return code is 0, else the return code is 1. |
| 296 | has_pic() { |
|
|
| 297 | [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 |
|
|
| 298 | [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 |
|
|
| 299 | test_version_info pie && return 0 |
|
|
| 300 | return 1 |
|
|
| 301 | } |
|
|
| 302 | |
|
|
| 303 | has_pie() { |
|
|
| 304 | [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 |
|
|
| 305 | [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 |
|
|
| 306 | test_version_info pie && return 0 |
|
|
| 307 | return 1 |
|
|
| 308 | } |
|
|
| 309 | |
|
|
| 310 | has_ssp() { |
|
|
| 311 | [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 |
|
|
| 312 | test_version_info ssp && return 0 |
|
|
| 313 | return 1 |
|
|
| 314 | } |
|
|
| 315 | |
|
|
| 316 | has_m64() { |
485 | has_m64() { |
|
|
486 | eqawarn "${FUNCNAME}: don't use this anymore" |
|
|
487 | |
| 317 | # this doesnt test if the flag is accepted, it tests if the flag |
488 | # 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! |
489 | # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! |
| 319 | # please dont replace this function with test_flag in some future |
490 | # please dont replace this function with test_flag in some future |
| 320 | # clean-up! |
491 | # clean-up! |
| 321 | temp=`mktemp` |
492 | |
|
|
493 | local temp="$(emktemp)" |
| 322 | echo "int main() { return(0); }" > ${temp}.c |
494 | echo "int main() { return(0); }" > "${temp}".c |
| 323 | ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 |
495 | MY_CC=$(tc-getCC) |
| 324 | ret=$? |
496 | ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 |
|
|
497 | local ret=$? |
| 325 | rm -f ${temp}.c |
498 | rm -f "${temp}".c |
| 326 | [ "$ret" != "1" ] && return 0 |
499 | [[ ${ret} != 1 ]] && return 0 |
| 327 | return 1 |
500 | return 1 |
| 328 | } |
501 | } |
| 329 | |
502 | |
| 330 | has_m32() { |
503 | has_m32() { |
| 331 | # this doesnt test if the flag is accepted, it tests if the flag |
504 | die "${FUNCNAME}: don't use this anymore" |
| 332 | # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! |
|
|
| 333 | # please dont replace this function with test_flag in some future |
|
|
| 334 | # clean-up! |
|
|
| 335 | temp=`mktemp` |
|
|
| 336 | echo "int main() { return(0); }" > ${temp}.c |
|
|
| 337 | ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 |
|
|
| 338 | ret=$? |
|
|
| 339 | rm -f ${temp}.c |
|
|
| 340 | [ "$ret" != "1" ] && return 0 |
|
|
| 341 | return 1 |
|
|
| 342 | } |
505 | } |
| 343 | |
506 | |
|
|
507 | # @FUNCTION: replace-sparc64-flags |
|
|
508 | # @DESCRIPTION: |
|
|
509 | # Sets mcpu to v8 and uses the original value as mtune if none specified. |
| 344 | replace-sparc64-flags() { |
510 | replace-sparc64-flags() { |
| 345 | local SPARC64_CPUS="ultrasparc v9" |
511 | local SPARC64_CPUS="ultrasparc3 ultrasparc v9" |
| 346 | |
512 | |
| 347 | if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then |
513 | if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then |
| 348 | for x in ${SPARC64_CPUS}; do |
514 | for x in ${SPARC64_CPUS}; do |
| 349 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" |
515 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" |
| 350 | done |
516 | done |
| 351 | else |
517 | else |
| 352 | for x in ${SPARC64_CPUS}; do |
518 | for x in ${SPARC64_CPUS}; do |
| 353 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
519 | CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
| 354 | done |
520 | done |
| 355 | fi |
521 | fi |
| 356 | |
522 | |
| 357 | if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then |
523 | if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then |
| 358 | for x in ${SPARC64_CPUS}; do |
524 | for x in ${SPARC64_CPUS}; do |
| 359 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" |
525 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" |
| 360 | done |
526 | done |
| 361 | else |
527 | else |
| 362 | for x in ${SPARC64_CPUS}; do |
528 | for x in ${SPARC64_CPUS}; do |
| 363 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
529 | CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
| 364 | done |
530 | done |
| 365 | fi |
531 | fi |
| 366 | |
532 | |
| 367 | export CFLAGS CXXFLAGS |
533 | export CFLAGS CXXFLAGS |
| 368 | } |
534 | } |
| 369 | |
535 | |
|
|
536 | # @FUNCTION: append-libs |
|
|
537 | # @USAGE: <libs> |
|
|
538 | # @DESCRIPTION: |
|
|
539 | # Add extra <libs> to the current LIBS. |
|
|
540 | append-libs() { |
|
|
541 | [[ $# -eq 0 ]] && return 0 |
|
|
542 | local flag |
|
|
543 | for flag in "$@"; do |
|
|
544 | [[ ${flag} == -l* ]] && flag=${flag#-l} |
|
|
545 | export LIBS="${LIBS} -l${flag}" |
|
|
546 | done |
|
|
547 | |
|
|
548 | return 0 |
|
|
549 | } |
|
|
550 | |
|
|
551 | # @FUNCTION: append-ldflags |
|
|
552 | # @USAGE: <flags> |
|
|
553 | # @DESCRIPTION: |
|
|
554 | # Add extra <flags> to the current LDFLAGS. |
| 370 | append-ldflags() { |
555 | append-ldflags() { |
|
|
556 | [[ $# -eq 0 ]] && return 0 |
|
|
557 | local flag |
|
|
558 | for flag in "$@"; do |
|
|
559 | [[ ${flag} == -l* ]] && \ |
|
|
560 | ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" |
|
|
561 | done |
|
|
562 | |
| 371 | export LDFLAGS="${LDFLAGS} $*" |
563 | export LDFLAGS="${LDFLAGS} $*" |
| 372 | return 0 |
564 | return 0 |
| 373 | } |
565 | } |
| 374 | |
566 | |
|
|
567 | # @FUNCTION: filter-ldflags |
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568 | # @USAGE: <flags> |
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569 | # @DESCRIPTION: |
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570 | # Remove particular <flags> from LDFLAGS. Accepts shell globs. |
| 375 | filter-ldflags() { |
571 | filter-ldflags() { |
| 376 | local x |
572 | _filter-var LDFLAGS "$@" |
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573 | return 0 |
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574 | } |
| 377 | |
575 | |
| 378 | # we do this fancy spacing stuff so as to not filter |
576 | # @FUNCTION: raw-ldflags |
| 379 | # out part of a flag ... we want flag atoms ! :D |
577 | # @USAGE: [flags] |
| 380 | LDFLAGS=" ${LDFLAGS} " |
578 | # @DESCRIPTION: |
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|
579 | # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results |
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580 | # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed |
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581 | # to gcc where it needs the '-Wl,'. |
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|
582 | # |
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|
583 | # If no flags are specified, then default to ${LDFLAGS}. |
|
|
584 | raw-ldflags() { |
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585 | local x input="$@" |
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586 | [[ -z ${input} ]] && input=${LDFLAGS} |
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587 | set -- |
| 381 | for x in "$@" ; do |
588 | for x in ${input} ; do |
| 382 | LDFLAGS="${LDFLAGS// ${x} / }" |
589 | x=${x#-Wl,} |
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|
590 | set -- "$@" ${x//,/ } |
| 383 | done |
591 | done |
| 384 | LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" |
592 | echo "$@" |
| 385 | export LDFLAGS |
|
|
| 386 | return 0 |
|
|
| 387 | } |
593 | } |
| 388 | |
594 | |
| 389 | etexec-flags() { |
595 | # @FUNCTION: no-as-needed |
| 390 | # if you're not using a hardened compiler you wont need this |
596 | # @RETURN: Flag to disable asneeded behavior for use with append-ldflags. |
| 391 | # PIC/no-pic kludge in the first place. |
597 | no-as-needed() { |
| 392 | has_hardened || return 0 |
598 | case $($(tc-getLD) -v 2>&1 </dev/null) in |
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599 | *GNU*) # GNU ld |
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|
600 | echo "-Wl,--no-as-needed" ;; |
|
|
601 | esac |
|
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602 | } |
| 393 | |
603 | |
| 394 | if has_pie || has_pic; then |
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|
| 395 | [ -z "`is-flag -fno-pic`" ] && |
|
|
| 396 | export CFLAGS="${CFLAGS} `test_flag -fno-pic`" |
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|
| 397 | [ -z "`is-flag -nopie`" ] && |
|
|
| 398 | export CFLAGS="${CFLAGS} `test_flag -nopie`" |
|
|
| 399 | fi |
604 | fi |
| 400 | return 0 |
|
|
| 401 | } |
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|
| 402 | |
|
|
| 403 | fstack-flags() { |
|
|
| 404 | if has_ssp; then |
|
|
| 405 | [ -z "`is-flag -fno-stack-protector`" ] && |
|
|
| 406 | export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" |
|
|
| 407 | fi |
|
|
| 408 | return 0 |
|
|
| 409 | } |
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