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eclass/flag-o-matic: Sync with gentoo
It's from gentoo commit 76a84c525c56fb6ed3fe108d8105f617771bd88f.
This commit is contained in:
Krzesimir Nowak
parent
5b54b4df2b
commit
7514aa2a2a
@ -1,33 +1,67 @@
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# Copyright 1999-2017 Gentoo Foundation
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# Copyright 1999-2021 Gentoo Authors
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# Distributed under the terms of the GNU General Public License v2
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# @ECLASS: flag-o-matic.eclass
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# @MAINTAINER:
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# toolchain@gentoo.org
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# @SUPPORTED_EAPIS: 5 6 7 8
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# @BLURB: common functions to manipulate and query toolchain flags
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# @DESCRIPTION:
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# This eclass contains a suite of functions to help developers sanely
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# and safely manage toolchain flags in their builds.
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case ${EAPI:-0} in
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0|1|2|3|4) die "flag-o-matic.eclass: EAPI ${EAPI} is too old." ;;
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5|6|7|8) ;;
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*) die "EAPI ${EAPI} is not supported by flag-o-matic.eclass." ;;
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esac
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if [[ -z ${_FLAG_O_MATIC_ECLASS} ]]; then
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_FLAG_O_MATIC_ECLASS=1
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inherit eutils toolchain-funcs multilib
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inherit toolchain-funcs
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[[ ${EAPI} == [567] ]] && inherit eutils
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# @FUNCTION: all-flag-vars
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# @DESCRIPTION:
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# Return all the flag variables that our high level funcs operate on.
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all-flag-vars() {
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echo {ADA,C,CPP,CXX,CCAS,F,FC,LD}FLAGS
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}
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# @FUNCTION: setup-allowed-flags
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# @INTERNAL
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# @DESCRIPTION:
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# {C,CPP,CXX,CCAS,F,FC,LD}FLAGS that we allow in strip-flags
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# Note: shell globs and character lists are allowed
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setup-allowed-flags() {
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[[ ${EAPI} == [567] ]] ||
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die "Internal function ${FUNCNAME} is not available in EAPI ${EAPI}."
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_setup-allowed-flags "$@"
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}
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# @FUNCTION: _setup-allowed-flags
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# @INTERNAL
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# @DESCRIPTION:
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# {C,CPP,CXX,CCAS,F,FC,LD}FLAGS that we allow in strip-flags
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# Note: shell globs and character lists are allowed
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_setup-allowed-flags() {
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ALLOWED_FLAGS=(
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-pipe -O '-O[12sg]' -mcpu -march -mtune
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'-fstack-protector*' '-fsanitize*' '-fstack-check*' -fno-stack-check
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'-fstack-protector*'
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'-fsanitize*' '-fno-sanitize*'
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'-fstack-check*' -fno-stack-check
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-fbounds-check -fbounds-checking -fno-strict-overflow
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-fno-PIE -fno-pie -nopie -no-pie -fno-unit-at-a-time
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-g '-g[0-9]' -ggdb '-ggdb[0-9]' '-gdwarf-*' gstabs -gstabs+ -gz
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# debugging symbols should generally be very safe to add
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-g '-g[0-9]'
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-ggdb '-ggdb[0-9]'
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-gdwarf '-gdwarf-*'
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-gstabs -gstabs+
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-gz
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-fno-ident -fpermissive -frecord-gcc-switches
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'-fdiagnostics*' '-fplugin*'
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'-W*' -w
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@ -56,7 +90,9 @@ setup-allowed-flags() {
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-mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi
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-mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel
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-mstack-bias -mno-stack-bias -msecure-plt '-m*-toc' -mfloat-abi
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-mfix-r10000 -mno-fix-r10000 -mthumb -marm
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-mfix-r4000 -mno-fix-r4000 -mfix-r4400 -mno-fix-r4400
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-mfix-rm7000 -mno-fix-rm7000 -mfix-r10000 -mno-fix-r10000
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-mr10k-cache-barrier -mthumb -marm
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# gcc 4.5
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-mno-fma4 -mno-movbe -mno-xop -mno-lwp
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@ -78,7 +114,10 @@ setup-allowed-flags() {
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)
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}
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# inverted filters for hardened compiler. This is trying to unpick
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# @FUNCTION: _filter-hardened
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# @INTERNAL
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# @DESCRIPTION:
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# Inverted filters for hardened compiler. This is trying to unpick
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# the hardened compiler defaults.
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_filter-hardened() {
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local f
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@ -112,6 +151,9 @@ _filter-hardened() {
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done
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}
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# @FUNCTION: _filter-var
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# @INTERNAL
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# @DESCRIPTION:
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# Remove occurrences of strings from variable given in $1
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# Strings removed are matched as globs, so for example
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# '-O*' would remove -O1, -O2 etc.
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@ -151,7 +193,8 @@ filter-lfs-flags() {
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# _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
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# _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
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# _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
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filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
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# _TIME_BITS: default to 64bit time_t (requires _FILE_OFFSET_BITS=64)
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filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_TIME_BITS=64
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}
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# @FUNCTION: filter-ldflags
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@ -304,6 +347,11 @@ replace-cpu-flags() {
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return 0
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}
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# @FUNCTION: _is_flagq
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# @USAGE: <variable> <flag>
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# @INTERNAL
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# @DESCRIPTION:
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# Returns shell true if <flag> is in a given <variable>, else returns shell false.
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_is_flagq() {
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local x var="$1[*]"
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for x in ${!var} ; do
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@ -392,10 +440,11 @@ filter-mfpmath() {
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# Strip *FLAGS of everything except known good/safe flags. This runs over all
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# flags returned by all_flag_vars().
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strip-flags() {
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[[ $# -ne 0 ]] && die "strip-flags takes no arguments"
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local x y var
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local ALLOWED_FLAGS
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setup-allowed-flags
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_setup-allowed-flags
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set -f # disable pathname expansion
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@ -428,36 +477,112 @@ strip-flags() {
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return 0
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}
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# @FUNCTION: test-flag-PROG
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# @USAGE: <compiler> <flag>
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# @INTERNAL
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# @DESCRIPTION:
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# Returns shell true if <flag> is supported by given <compiler>,
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# else returns shell false.
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test-flag-PROG() {
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[[ ${EAPI} == [567] ]] ||
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die "Internal function ${FUNCNAME} is not available in EAPI ${EAPI}."
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_test-flag-PROG "$@"
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}
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# @FUNCTION: _test-flag-PROG
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# @USAGE: <compiler> <flag>
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# @INTERNAL
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# @DESCRIPTION:
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# Returns shell true if <flag> is supported by given <compiler>,
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# else returns shell false.
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_test-flag-PROG() {
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local comp=$1
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local lang=$2
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shift 2
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[[ -z ${comp} || -z $1 ]] && return 1
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if [[ -z ${comp} ]]; then
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return 1
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fi
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if [[ -z $1 ]]; then
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return 1
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fi
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# verify selected compiler exists before using it
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comp=($(tc-get${comp}))
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# 'comp' can already contain compiler options.
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# 'type' needs a binary name
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if ! type -p ${comp[0]} >/dev/null; then
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return 1
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fi
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# Set up test file.
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local in_src in_ext cmdline_extra=()
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case "${lang}" in
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# compiler/assembler only
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c)
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in_ext='c'
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in_src='int main(void) { return 0; }'
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cmdline_extra+=(-xc -c)
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;;
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c++)
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in_ext='cc'
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in_src='int main(void) { return 0; }'
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cmdline_extra+=(-xc++ -c)
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;;
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f77)
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in_ext='f'
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# fixed source form
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in_src=' end'
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cmdline_extra+=(-xf77 -c)
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;;
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f95)
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in_ext='f90'
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in_src='end'
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cmdline_extra+=(-xf95 -c)
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;;
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# C compiler/assembler/linker
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c+ld)
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in_ext='c'
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in_src='int main(void) { return 0; }'
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cmdline_extra+=(-xc)
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;;
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esac
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local test_in=${T}/test-flag.${in_ext}
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local test_out=${T}/test-flag.exe
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printf "%s\n" "${in_src}" > "${test_in}" || die "Failed to create '${test_in}'"
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# Currently we rely on warning-free output of a compiler
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# before the flag to see if a flag prduces any warnings.
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# This has a few drawbacks:
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# - if compiler already generates warnings we filter out
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# every single flag: bug #712488
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# - if user actually wants to see warnings we just strip
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# them regardless of warnings type.
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#
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# We can add more selective detection of no-op flags via
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# '-Werror=ignored-optimization-argument' and similar error options
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# similar to what we are doing with '-Qunused-arguments'.
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local cmdline=(
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$(tc-get${comp})
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"${comp[@]}"
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# Clang will warn about unknown gcc flags but exit 0.
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# Need -Werror to force it to exit non-zero.
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-Werror
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# Use -c so we can test the assembler as well.
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-c -o /dev/null
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)
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if "${cmdline[@]}" -x${lang} - </dev/null &>/dev/null ; then
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cmdline+=( "$@" -x${lang} - )
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else
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# XXX: what's the purpose of this? does it even work with
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# any compiler?
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cmdline+=( "$@" -c -o /dev/null /dev/null )
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fi
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"$@"
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# -x<lang> options need to go before first source file
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"${cmdline_extra[@]}"
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if ! "${cmdline[@]}" </dev/null &>/dev/null; then
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"${test_in}" -o "${test_out}"
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)
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if ! "${cmdline[@]}" &>/dev/null; then
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# -Werror makes clang bail out on unused arguments as well;
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# try to add -Qunused-arguments to work-around that
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# other compilers don't support it but then, it's failure like
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# any other
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cmdline+=( -Qunused-arguments )
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"${cmdline[@]}" </dev/null &>/dev/null
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"${cmdline[@]}" &>/dev/null
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fi
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}
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@ -465,27 +590,51 @@ test-flag-PROG() {
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# @USAGE: <flag>
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# @DESCRIPTION:
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# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
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test-flag-CC() { test-flag-PROG "CC" c "$@"; }
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test-flag-CC() { _test-flag-PROG CC c "$@"; }
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# @FUNCTION: test-flag-CXX
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# @USAGE: <flag>
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# @DESCRIPTION:
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# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
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test-flag-CXX() { test-flag-PROG "CXX" c++ "$@"; }
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test-flag-CXX() { _test-flag-PROG CXX c++ "$@"; }
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# @FUNCTION: test-flag-F77
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# @USAGE: <flag>
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# @DESCRIPTION:
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# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
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test-flag-F77() { test-flag-PROG "F77" f77 "$@"; }
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test-flag-F77() { _test-flag-PROG F77 f77 "$@"; }
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# @FUNCTION: test-flag-FC
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# @USAGE: <flag>
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# @DESCRIPTION:
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# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
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test-flag-FC() { test-flag-PROG "FC" f95 "$@"; }
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test-flag-FC() { _test-flag-PROG FC f95 "$@"; }
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# @FUNCTION: test-flag-CCLD
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# @USAGE: <flag>
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# @DESCRIPTION:
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# Returns shell true if <flag> is supported by the C compiler and linker, else returns shell false.
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test-flag-CCLD() { _test-flag-PROG CC c+ld "$@"; }
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# @FUNCTION: test-flags-PROG
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# @USAGE: <compiler> <flag> [more flags...]
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# @INTERNAL
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# @DESCRIPTION:
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# Returns shell true if <flags> are supported by given <compiler>,
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# else returns shell false.
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test-flags-PROG() {
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[[ ${EAPI} == [567] ]] ||
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die "Internal function ${FUNCNAME} is not available in EAPI ${EAPI}."
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_test-flags-PROG "$@"
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}
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# @FUNCTION: _test-flags-PROG
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# @USAGE: <compiler> <flag> [more flags...]
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# @INTERNAL
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# @DESCRIPTION:
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# Returns shell true if <flags> are supported by given <compiler>,
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# else returns shell false.
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_test-flags-PROG() {
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local comp=$1
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local flags=()
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local x
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@ -496,7 +645,8 @@ test-flags-PROG() {
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while (( $# )); do
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case "$1" in
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--param)
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# '-B /foo': bug # 687198
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--param|-B)
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if test-flag-${comp} "$1" "$2"; then
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flags+=( "$1" "$2" )
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fi
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@ -521,25 +671,31 @@ test-flags-PROG() {
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# @USAGE: <flags>
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# @DESCRIPTION:
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# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
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test-flags-CC() { test-flags-PROG "CC" "$@"; }
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test-flags-CC() { _test-flags-PROG CC "$@"; }
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# @FUNCTION: test-flags-CXX
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# @USAGE: <flags>
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# @DESCRIPTION:
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# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
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test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
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test-flags-CXX() { _test-flags-PROG CXX "$@"; }
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# @FUNCTION: test-flags-F77
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# @USAGE: <flags>
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# @DESCRIPTION:
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# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
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test-flags-F77() { test-flags-PROG "F77" "$@"; }
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test-flags-F77() { _test-flags-PROG F77 "$@"; }
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# @FUNCTION: test-flags-FC
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# @USAGE: <flags>
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# @DESCRIPTION:
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# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
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test-flags-FC() { test-flags-PROG "FC" "$@"; }
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test-flags-FC() { _test-flags-PROG FC "$@"; }
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# @FUNCTION: test-flags-CCLD
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# @USAGE: <flags>
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# @DESCRIPTION:
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# Returns shell true if <flags> are supported by the C compiler and default linker, else returns shell false.
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test-flags-CCLD() { _test-flags-PROG CCLD "$@"; }
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# @FUNCTION: test-flags
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# @USAGE: <flags>
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@ -565,13 +721,12 @@ test_version_info() {
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# @DESCRIPTION:
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# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
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strip-unsupported-flags() {
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[[ $# -ne 0 ]] && die "strip-unsupported-flags takes no arguments"
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export CFLAGS=$(test-flags-CC ${CFLAGS})
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export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
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export FFLAGS=$(test-flags-F77 ${FFLAGS})
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export FCFLAGS=$(test-flags-FC ${FCFLAGS})
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# note: this does not verify the linker flags but it is enough
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# to strip invalid C flags which are much more likely, #621274
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export LDFLAGS=$(test-flags-CC ${LDFLAGS})
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export LDFLAGS=$(test-flags-CCLD ${LDFLAGS})
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}
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# @FUNCTION: get-flag
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@ -579,6 +734,7 @@ strip-unsupported-flags() {
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# @DESCRIPTION:
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# Find and echo the value for a particular flag. Accepts shell globs.
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get-flag() {
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[[ $# -ne 1 ]] && die "usage: <flag>"
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local f var findflag="$1"
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# this code looks a little flaky but seems to work for
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@ -597,18 +753,11 @@ get-flag() {
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return 1
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}
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has_m64() {
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die "${FUNCNAME}: don't use this anymore"
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}
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has_m32() {
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die "${FUNCNAME}: don't use this anymore"
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}
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# @FUNCTION: replace-sparc64-flags
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# @DESCRIPTION:
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# Sets mcpu to v8 and uses the original value as mtune if none specified.
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replace-sparc64-flags() {
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[[ $# -ne 0 ]] && die "replace-sparc64-flags takes no arguments"
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local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
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if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
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@ -692,6 +841,7 @@ raw-ldflags() {
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# @FUNCTION: no-as-needed
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# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
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no-as-needed() {
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[[ $# -ne 0 ]] && die "no-as-needed takes no arguments"
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case $($(tc-getLD) -v 2>&1 </dev/null) in
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*GNU*) # GNU ld
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echo "-Wl,--no-as-needed" ;;
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|
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