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recursive feature dependency checking

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Originally committed as revision 7930 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2007-02-11 15:49:37 +00:00
parent fa859b4d8a
commit 799c9e9bcb
1 changed files with 30 additions and 0 deletions
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30
configure vendored
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@ -216,6 +216,25 @@ set_all(){
done
}
pushvar(){
for var in $*; do
eval level=\${${var}_level:=0}
eval ${var}_${level}="\$$var"
eval ${var}_level=$(($level+1))
done
}
popvar(){
for var in $*; do
eval level=\${${var}_level:-0}
test $level = 0 && continue
eval level=$(($level-1))
eval $var="\${${var}_${level}}"
eval ${var}_level=$level
eval unset ${var}_${level}
done
}
enable(){
set_all yes $*
}
@ -258,10 +277,21 @@ disabled_any(){
check_deps(){
for cfg; do
enabled ${cfg}_checking && die "Circular dependency for $cfg."
disabled ${cfg}_checking && continue
enable ${cfg}_checking
eval dep_all="\$${cfg}_deps"
eval dep_any="\$${cfg}_deps_any"
pushvar cfg dep_all dep_any
check_deps $dep_all $dep_any
popvar cfg dep_all dep_any
enabled_all $dep_all || disable $cfg
enabled_any $dep_any || disable $cfg
disable ${cfg}_checking
done
}