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# Copyright 1999-2012 Gentoo Foundation |
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# Distributed under the terms of the GNU General Public License v2 |
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# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.183 2012/11/18 08:29:17 vapier Exp $ |
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|
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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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# @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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|
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if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then |
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___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank" |
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|
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inherit eutils toolchain-funcs multilib |
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|
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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 {C,CPP,CXX,CCAS,F,FC,LD}FLAGS |
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} |
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|
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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="-pipe" |
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ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune" |
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ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all" |
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ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow" |
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ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time" |
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ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+" |
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ALLOWED_FLAGS+=" -fno-ident -fpermissive" |
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ALLOWED_FLAGS+=" -W* -w" |
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|
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# allow a bunch of flags that negate features / control ABI |
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ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \ |
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-fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \ |
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-fno-omit-frame-pointer" |
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ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \ |
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-mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \ |
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-mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \ |
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-mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \ |
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-msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ |
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-mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \ |
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-mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \ |
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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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-D* -U*" |
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|
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# 4.5 |
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ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp" |
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# 4.6 |
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ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm" |
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# 4.7 |
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ALLOWED_FLAGS+=" -mno-avx2 -mno-bmi2 -mno-fma -mno-lzcnt" |
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|
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# CPPFLAGS and LDFLAGS |
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ALLOWED_FLAGS+=" -I* -L* -R* -Wl,*" |
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|
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export ALLOWED_FLAGS |
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return 0 |
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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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# the hardened compiler defaults. |
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_filter-hardened() { |
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local f |
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for f in "$@" ; do |
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case "${f}" in |
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# Ideally we should only concern ourselves with PIE flags, |
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# not -fPIC or -fpic, but too many places filter -fPIC without |
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# thinking about -fPIE. |
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-fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) |
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gcc-specs-pie || continue |
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is-flagq -nopie || append-flags -nopie;; |
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-fstack-protector) |
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gcc-specs-ssp || continue |
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is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);; |
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-fstack-protector-all) |
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gcc-specs-ssp-to-all || continue |
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is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);; |
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-fno-strict-overflow) |
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gcc-specs-nostrict || continue |
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is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);; |
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esac |
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done |
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} |
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|
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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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_filter-var() { |
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local f x var=$1 new=() |
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shift |
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|
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for f in ${!var} ; do |
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for x in "$@" ; do |
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# Note this should work with globs like -O* |
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[[ ${f} == ${x} ]] && continue 2 |
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done |
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new+=( "${f}" ) |
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done |
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eval export ${var}=\""${new[*]}"\" |
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} |
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|
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# @FUNCTION: filter-flags |
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# @USAGE: <flags> |
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# @DESCRIPTION: |
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# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs. |
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filter-flags() { |
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_filter-hardened "$@" |
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local v |
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for v in $(all-flag-vars) ; do |
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_filter-var ${v} "$@" |
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done |
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return 0 |
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} |
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|
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# @FUNCTION: filter-lfs-flags |
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# @DESCRIPTION: |
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# Remove flags that enable Large File Support. |
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filter-lfs-flags() { |
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[[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments" |
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# http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html |
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# _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...) |
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# _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...) |
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# _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t) |
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filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
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} |
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|
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# @FUNCTION: filter-ldflags |
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# @USAGE: <flags> |
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# @DESCRIPTION: |
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# Remove particular <flags> from LDFLAGS. Accepts shell globs. |
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filter-ldflags() { |
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_filter-var LDFLAGS "$@" |
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return 0 |
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} |
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|
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# @FUNCTION: append-cppflags |
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# @USAGE: <flags> |
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# @DESCRIPTION: |
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# Add extra <flags> to the current CPPFLAGS. |
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append-cppflags() { |
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[[ $# -eq 0 ]] && return 0 |
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export CPPFLAGS="${CPPFLAGS} $*" |
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return 0 |
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} |
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|
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# @FUNCTION: append-cflags |
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# @USAGE: <flags> |
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# @DESCRIPTION: |
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# Add extra <flags> to the current CFLAGS. |
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append-cflags() { |
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[[ $# -eq 0 ]] && return 0 |
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export CFLAGS=$(test-flags-CC ${CFLAGS} "$@") |
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return 0 |
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} |
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|
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# @FUNCTION: append-cxxflags |
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# @USAGE: <flags> |
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# @DESCRIPTION: |
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# Add extra <flags> to the current CXXFLAGS. |
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append-cxxflags() { |
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[[ $# -eq 0 ]] && return 0 |
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export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@") |
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return 0 |
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} |
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|
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# @FUNCTION: append-fflags |
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# @USAGE: <flags> |
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# @DESCRIPTION: |
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# Add extra <flags> to the current {F,FC}FLAGS. |
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append-fflags() { |
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[[ $# -eq 0 ]] && return 0 |
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export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@") |
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export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@") |
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return 0 |
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} |
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|
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# @FUNCTION: append-lfs-flags |
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# @DESCRIPTION: |
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# Add flags that enable Large File Support. |
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append-lfs-flags() { |
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[[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments" |
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# see comments in filter-lfs-flags func for meaning of these |
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append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
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} |
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|
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# @FUNCTION: append-ldflags |
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# @USAGE: <flags> |
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# @DESCRIPTION: |
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# Add extra <flags> to the current LDFLAGS. |
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append-ldflags() { |
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[[ $# -eq 0 ]] && return 0 |
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local flag |
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for flag in "$@"; do |
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[[ ${flag} == -l* ]] && \ |
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eqawarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" |
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done |
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|
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export LDFLAGS="${LDFLAGS} $*" |
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return 0 |
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} |
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|
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# @FUNCTION: append-flags |
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# @USAGE: <flags> |
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# @DESCRIPTION: |
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# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. |
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append-flags() { |
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[[ $# -eq 0 ]] && return 0 |
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case " $* " in |
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*' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;; |
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*' '-L*|\ |
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*' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;; |
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esac |
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append-cflags "$@" |
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append-cxxflags "$@" |
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append-fflags "$@" |
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return 0 |
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} |
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|
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# @FUNCTION: replace-flags |
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# @USAGE: <old> <new> |
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# @DESCRIPTION: |
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# Replace the <old> flag with <new>. Accepts shell globs for <old>. |
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replace-flags() { |
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[[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>" |
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|
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local f var new |
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for var in $(all-flag-vars) ; do |
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# Looping over the flags instead of using a global |
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# substitution ensures that we're working with flag atoms. |
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# Otherwise globs like -O* have the potential to wipe out the |
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# list of flags. |
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new=() |
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for f in ${!var} ; do |
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# Note this should work with globs like -O* |
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[[ ${f} == ${1} ]] && f=${2} |
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new+=( "${f}" ) |
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done |
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eval export ${var}=\""${new[*]}"\" |
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done |
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|
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return 0 |
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} |
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|
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# @FUNCTION: replace-cpu-flags |
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# @USAGE: <old> <new> |
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# @DESCRIPTION: |
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# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu |
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# with flags that select the <new> cpu. Accepts shell globs for <old>. |
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replace-cpu-flags() { |
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local newcpu="$#" ; newcpu="${!newcpu}" |
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while [ $# -gt 1 ] ; do |
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# quote to make sure that no globbing is done (particularly on |
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# ${oldcpu}) prior to calling replace-flags |
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replace-flags "-march=${1}" "-march=${newcpu}" |
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replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" |
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replace-flags "-mtune=${1}" "-mtune=${newcpu}" |
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shift |
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done |
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return 0 |
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} |
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|
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_is_flagq() { |
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local x var |
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eval var=\""\${$1[*]}"\" |
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for x in ${var} ; do |
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[[ ${x} == $2 ]] && return 0 |
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done |
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return 1 |
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} |
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|
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# @FUNCTION: is-flagq |
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# @USAGE: <flag> |
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# @DESCRIPTION: |
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# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs. |
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is-flagq() { |
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[[ -n $2 ]] && die "Usage: is-flag <flag>" |
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|
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local var |
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for var in $(all-flag-vars) ; do |
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_is_flagq ${var} "$1" && return 0 |
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done |
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return 1 |
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} |
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|
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# @FUNCTION: is-flag |
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# @USAGE: <flag> |
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# @DESCRIPTION: |
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# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs. |
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is-flag() { |
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is-flagq "$@" && echo true |
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} |
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|
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# @FUNCTION: is-ldflagq |
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# @USAGE: <flag> |
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# @DESCRIPTION: |
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# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs. |
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is-ldflagq() { |
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[[ -n $2 ]] && die "Usage: is-ldflag <flag>" |
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_is_flagq LDFLAGS $1 |
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} |
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|
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# @FUNCTION: is-ldflag |
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# @USAGE: <flag> |
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# @DESCRIPTION: |
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# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs. |
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is-ldflag() { |
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is-ldflagq "$@" && echo true |
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} |
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|
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# @FUNCTION: filter-mfpmath |
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# @USAGE: <math types> |
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# @DESCRIPTION: |
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# Remove specified math types from the fpmath flag. For example, if the user |
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# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with |
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# -mfpmath=386. |
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filter-mfpmath() { |
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local orig_mfpmath new_math prune_math |
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|
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# save the original -mfpmath flag |
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orig_mfpmath=$(get-flag -mfpmath) |
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# get the value of the current -mfpmath flag |
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new_math=$(get-flag mfpmath) |
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new_math=" ${new_math//,/ } " |
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# figure out which math values are to be removed |
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prune_math="" |
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for prune_math in "$@" ; do |
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new_math=${new_math/ ${prune_math} / } |
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done |
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new_math=$(echo ${new_math}) |
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new_math=${new_math// /,} |
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|
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if [[ -z ${new_math} ]] ; then |
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# if we're removing all user specified math values are |
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# slated for removal, then we just filter the flag |
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filter-flags ${orig_mfpmath} |
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else |
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# if we only want to filter some of the user specified |
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# math values, then we replace the current flag |
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replace-flags ${orig_mfpmath} -mfpmath=${new_math} |
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fi |
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return 0 |
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} |
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|
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# @FUNCTION: strip-flags |
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# @DESCRIPTION: |
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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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local x y var |
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|
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setup-allowed-flags |
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|
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set -f # disable pathname expansion |
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|
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for var in $(all-flag-vars) ; do |
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local new=() |
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|
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for x in ${!var} ; do |
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local flag=${x%%=*} |
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for y in ${ALLOWED_FLAGS} ; do |
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if [[ -z ${flag%%${y}} ]] ; then |
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new+=( "${x}" ) |
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break |
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fi |
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done |
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done |
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|
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# In case we filtered out all optimization flags fallback to -O2 |
| 374 |
if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then |
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new+=( -O2 ) |
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fi |
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|
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eval export ${var}=\""${new[*]}"\" |
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done |
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|
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set +f # re-enable pathname expansion |
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|
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return 0 |
| 384 |
} |
| 385 |
|
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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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local flag=$3 |
| 390 |
|
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[[ -z ${comp} || -z ${flag} ]] && return 1 |
| 392 |
|
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# use -c so we can test the assembler as well |
| 394 |
local PROG=$(tc-get${comp}) |
| 395 |
${PROG} "${flag}" -c -o /dev/null -x${lang} - < /dev/null \ |
| 396 |
> /dev/null 2>&1 |
| 397 |
} |
| 398 |
|
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# @FUNCTION: test-flag-CC |
| 400 |
# @USAGE: <flag> |
| 401 |
# @DESCRIPTION: |
| 402 |
# Returns shell true if <flag> is supported by the C compiler, else returns shell false. |
| 403 |
test-flag-CC() { test-flag-PROG "CC" c "$1"; } |
| 404 |
|
| 405 |
# @FUNCTION: test-flag-CXX |
| 406 |
# @USAGE: <flag> |
| 407 |
# @DESCRIPTION: |
| 408 |
# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false. |
| 409 |
test-flag-CXX() { test-flag-PROG "CXX" c++ "$1"; } |
| 410 |
|
| 411 |
# @FUNCTION: test-flag-F77 |
| 412 |
# @USAGE: <flag> |
| 413 |
# @DESCRIPTION: |
| 414 |
# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false. |
| 415 |
test-flag-F77() { test-flag-PROG "F77" f77 "$1"; } |
| 416 |
|
| 417 |
# @FUNCTION: test-flag-FC |
| 418 |
# @USAGE: <flag> |
| 419 |
# @DESCRIPTION: |
| 420 |
# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false. |
| 421 |
test-flag-FC() { test-flag-PROG "FC" f95 "$1"; } |
| 422 |
|
| 423 |
test-flags-PROG() { |
| 424 |
local comp=$1 |
| 425 |
local flags=() |
| 426 |
local x |
| 427 |
|
| 428 |
shift |
| 429 |
|
| 430 |
[[ -z ${comp} ]] && return 1 |
| 431 |
|
| 432 |
for x ; do |
| 433 |
test-flag-${comp} "${x}" && flags+=( "${x}" ) |
| 434 |
done |
| 435 |
|
| 436 |
echo "${flags[*]}" |
| 437 |
|
| 438 |
# Just bail if we dont have any flags |
| 439 |
[[ ${#flags[@]} -gt 0 ]] |
| 440 |
} |
| 441 |
|
| 442 |
# @FUNCTION: test-flags-CC |
| 443 |
# @USAGE: <flags> |
| 444 |
# @DESCRIPTION: |
| 445 |
# Returns shell true if <flags> are supported by the C compiler, else returns shell false. |
| 446 |
test-flags-CC() { test-flags-PROG "CC" "$@"; } |
| 447 |
|
| 448 |
# @FUNCTION: test-flags-CXX |
| 449 |
# @USAGE: <flags> |
| 450 |
# @DESCRIPTION: |
| 451 |
# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false. |
| 452 |
test-flags-CXX() { test-flags-PROG "CXX" "$@"; } |
| 453 |
|
| 454 |
# @FUNCTION: test-flags-F77 |
| 455 |
# @USAGE: <flags> |
| 456 |
# @DESCRIPTION: |
| 457 |
# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false. |
| 458 |
test-flags-F77() { test-flags-PROG "F77" "$@"; } |
| 459 |
|
| 460 |
# @FUNCTION: test-flags-FC |
| 461 |
# @USAGE: <flags> |
| 462 |
# @DESCRIPTION: |
| 463 |
# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false. |
| 464 |
test-flags-FC() { test-flags-PROG "FC" "$@"; } |
| 465 |
|
| 466 |
# @FUNCTION: test-flags |
| 467 |
# @USAGE: <flags> |
| 468 |
# @DESCRIPTION: |
| 469 |
# Short-hand that should hopefully work for both C and C++ compiler, but |
| 470 |
# its really only present due to the append-flags() abomination. |
| 471 |
test-flags() { test-flags-CC "$@"; } |
| 472 |
|
| 473 |
# @FUNCTION: test_version_info |
| 474 |
# @USAGE: <version> |
| 475 |
# @DESCRIPTION: |
| 476 |
# Returns shell true if the current C compiler version matches <version>, else returns shell false. |
| 477 |
# Accepts shell globs. |
| 478 |
test_version_info() { |
| 479 |
if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then |
| 480 |
return 0 |
| 481 |
else |
| 482 |
return 1 |
| 483 |
fi |
| 484 |
} |
| 485 |
|
| 486 |
# @FUNCTION: strip-unsupported-flags |
| 487 |
# @DESCRIPTION: |
| 488 |
# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain. |
| 489 |
strip-unsupported-flags() { |
| 490 |
export CFLAGS=$(test-flags-CC ${CFLAGS}) |
| 491 |
export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) |
| 492 |
export FFLAGS=$(test-flags-F77 ${FFLAGS}) |
| 493 |
export FCFLAGS=$(test-flags-FC ${FCFLAGS}) |
| 494 |
} |
| 495 |
|
| 496 |
# @FUNCTION: get-flag |
| 497 |
# @USAGE: <flag> |
| 498 |
# @DESCRIPTION: |
| 499 |
# Find and echo the value for a particular flag. Accepts shell globs. |
| 500 |
get-flag() { |
| 501 |
local f var findflag="$1" |
| 502 |
|
| 503 |
# this code looks a little flaky but seems to work for |
| 504 |
# everything we want ... |
| 505 |
# for example, if CFLAGS="-march=i686": |
| 506 |
# `get-flag -march` == "-march=i686" |
| 507 |
# `get-flag march` == "i686" |
| 508 |
for var in $(all-flag-vars) ; do |
| 509 |
for f in ${!var} ; do |
| 510 |
if [ "${f/${findflag}}" != "${f}" ] ; then |
| 511 |
printf "%s\n" "${f/-${findflag}=}" |
| 512 |
return 0 |
| 513 |
fi |
| 514 |
done |
| 515 |
done |
| 516 |
return 1 |
| 517 |
} |
| 518 |
|
| 519 |
# @FUNCTION: has_m64 |
| 520 |
# @DESCRIPTION: |
| 521 |
# This doesn't test if the flag is accepted, it tests if the flag actually |
| 522 |
# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works |
| 523 |
# return code is 0, else the return code is 1. |
| 524 |
has_m64() { |
| 525 |
eqawarn "${FUNCNAME}: don't use this anymore" |
| 526 |
|
| 527 |
# this doesnt test if the flag is accepted, it tests if the flag |
| 528 |
# actually -WORKS-. non-multilib gcc will take both -m32 and -m64! |
| 529 |
# please dont replace this function with test_flag in some future |
| 530 |
# clean-up! |
| 531 |
|
| 532 |
local temp="$(emktemp)" |
| 533 |
echo "int main() { return(0); }" > "${temp}".c |
| 534 |
MY_CC=$(tc-getCC) |
| 535 |
${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 |
| 536 |
local ret=$? |
| 537 |
rm -f "${temp}".c |
| 538 |
[[ ${ret} != 1 ]] && return 0 |
| 539 |
return 1 |
| 540 |
} |
| 541 |
|
| 542 |
has_m32() { |
| 543 |
die "${FUNCNAME}: don't use this anymore" |
| 544 |
} |
| 545 |
|
| 546 |
# @FUNCTION: replace-sparc64-flags |
| 547 |
# @DESCRIPTION: |
| 548 |
# Sets mcpu to v8 and uses the original value as mtune if none specified. |
| 549 |
replace-sparc64-flags() { |
| 550 |
local SPARC64_CPUS="ultrasparc3 ultrasparc v9" |
| 551 |
|
| 552 |
if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then |
| 553 |
for x in ${SPARC64_CPUS}; do |
| 554 |
CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" |
| 555 |
done |
| 556 |
else |
| 557 |
for x in ${SPARC64_CPUS}; do |
| 558 |
CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
| 559 |
done |
| 560 |
fi |
| 561 |
|
| 562 |
if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then |
| 563 |
for x in ${SPARC64_CPUS}; do |
| 564 |
CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" |
| 565 |
done |
| 566 |
else |
| 567 |
for x in ${SPARC64_CPUS}; do |
| 568 |
CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
| 569 |
done |
| 570 |
fi |
| 571 |
|
| 572 |
export CFLAGS CXXFLAGS |
| 573 |
} |
| 574 |
|
| 575 |
# @FUNCTION: append-libs |
| 576 |
# @USAGE: <libs> |
| 577 |
# @DESCRIPTION: |
| 578 |
# Add extra <libs> to the current LIBS. |
| 579 |
append-libs() { |
| 580 |
[[ $# -eq 0 ]] && return 0 |
| 581 |
local flag |
| 582 |
for flag in "$@"; do |
| 583 |
[[ ${flag} == -l* ]] && flag=${flag#-l} |
| 584 |
export LIBS="${LIBS} -l${flag}" |
| 585 |
done |
| 586 |
|
| 587 |
return 0 |
| 588 |
} |
| 589 |
|
| 590 |
# @FUNCTION: raw-ldflags |
| 591 |
# @USAGE: [flags] |
| 592 |
# @DESCRIPTION: |
| 593 |
# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results |
| 594 |
# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed |
| 595 |
# to gcc where it needs the '-Wl,'. |
| 596 |
# |
| 597 |
# If no flags are specified, then default to ${LDFLAGS}. |
| 598 |
raw-ldflags() { |
| 599 |
local x input="$@" |
| 600 |
[[ -z ${input} ]] && input=${LDFLAGS} |
| 601 |
set -- |
| 602 |
for x in ${input} ; do |
| 603 |
case ${x} in |
| 604 |
-Wl,*) |
| 605 |
x=${x#-Wl,} |
| 606 |
set -- "$@" ${x//,/ } |
| 607 |
;; |
| 608 |
*) # Assume it's a compiler driver flag, so throw it away #441808 |
| 609 |
;; |
| 610 |
esac |
| 611 |
done |
| 612 |
echo "$@" |
| 613 |
} |
| 614 |
|
| 615 |
# @FUNCTION: no-as-needed |
| 616 |
# @RETURN: Flag to disable asneeded behavior for use with append-ldflags. |
| 617 |
no-as-needed() { |
| 618 |
case $($(tc-getLD) -v 2>&1 </dev/null) in |
| 619 |
*GNU*) # GNU ld |
| 620 |
echo "-Wl,--no-as-needed" ;; |
| 621 |
esac |
| 622 |
} |
| 623 |
|
| 624 |
fi |
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