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configure: improve pkg-config support

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This adds helper functions for checking packages with pkg-config
and managing the associated flags.

Note that pkg-config use is still discouraged due to widespread
poor practices resulting in broken flags in many situations.  A
few badly designed packages require flags only obtainable using
pkg-config, and these functions are intended for those cases.

Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit 3f8040db3e)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Mans Rullgard 2011-03-06 13:48:30 +00:00 committed by Michael Niedermayer
parent 05aa8c4441
commit 5d117bd462
1 changed files with 35 additions and 1 deletions
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36
configure vendored
View File

@ -357,6 +357,16 @@ set_weak(){
done
}
set_safe(){
var=$1
shift
eval $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')='$*'
}
get_safe(){
eval echo \$$(echo "$1" | sed 's/[^A-Za-z0-9_]/_/g')
}
pushvar(){
for var in $*; do
eval level=\${${var}_level:=0}
@ -742,6 +752,20 @@ check_lib2(){
check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
}
check_pkg_config(){
log check_pkg_config "$@"
pkg="$1"
headers="$2"
funcs="$3"
shift 3
$pkg_config --exists $pkg || return
pkg_cflags=$($pkg_config --cflags $pkg)
pkg_libs=$($pkg_config --libs $pkg)
check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
set_safe ${pkg}_cflags $pkg_cflags &&
set_safe ${pkg}_libs $pkg_libs
}
check_exec(){
check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
}
@ -823,6 +847,13 @@ require2(){
check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
}
require_pkg_config(){
pkg="$1"
check_pkg_config "$@" || die "ERROR: $pkg not found"
add_cflags $(get_safe ${pkg}_cflags)
add_extralibs $(get_safe ${pkg}_libs)
}
check_host_cc(){
log check_host_cc "$@"
cat > $TMPC
@ -1149,6 +1180,7 @@ CMDLINE_SET="
logfile
malloc_prefix
nm
pkg_config
samples
source_path
strip
@ -1587,6 +1619,7 @@ host_cc_default="gcc"
ln_s="ln -sf"
nm_default="nm"
objformat="elf"
pkg_config_default=pkg-config
ranlib="ranlib"
strip_default="strip"
yasmexe="yasm"
@ -1796,12 +1829,13 @@ set_default arch target_os
ar_default="${cross_prefix}${ar_default}"
cc_default="${cross_prefix}${cc_default}"
nm_default="${cross_prefix}${nm_default}"
pkg_config_default="${cross_prefix}${pkg_config_default}"
ranlib="${cross_prefix}${ranlib}"
strip_default="${cross_prefix}${strip_default}"
sysinclude_default="${sysroot}/usr/include"
set_default cc nm strip sysinclude
set_default cc nm pkg_config strip sysinclude
enabled cross_compile || host_cc_default=$cc
set_default host_cc