Re: [PATCH] configure: add --enable/disable-random option

On 2012-05-09 04:32:09 +0100, Måns Rullgård wrote:
> This allows creating random configurations which is useful for
> testing purposes.
> 
> Signed-off-by: Mans Rullgard <mans@...>
> ---
> Disregard the previous mail.  It has some debug stuff left behind.
> ---
>  configure |   20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/configure b/configure
> index 67cba5a..e82006a 100755
> --- a/configure
> +++ b/configure
>  <at>  <at>  -261,6 +261,8  <at>  <at>  Developer options (useful when working on Libav itself):
>                             \$FATE_SAMPLES at make invocation time.
>    --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
>                             should be used only for debugging purposes)
> +  --enable-random=LIST     randomly enable/disable components
> +  --disable-random=LIST

an example would be nice '--disable-random=decoders[:0.20],encoders:0.8,...

I'm not sure if a simple --randconfig which disables all compoments with a
random probability would be easier to use. I'll add that.

>  NOTE: Object files are built at the place where configure is launched.
>  EOF
>  <at>  <at>  -1817,6 +1819,20  <at>  <at>  show_list() {
>      exit 0
>  }
>  
> +do_random(){
> +    action=$1
> +    IFS=,
> +    set -- $2
> +    unset IFS
> +    for thing; do
> +        comp=${thing%:*}
> +        prob=${thing#$comp}
> +        prob=${prob#:}
> +        is_in ${comp}s $COMPONENT_LIST && eval comp=\$$(toupper $comp)_LIST
> +        $action $(printf '%s\n' $comp | awk "BEGIN { srand() } rand() < ${prob:-0.5} { print }")
> +    done
> +}
> +
>  for opt do
>      optval="${opt#*=}"
>      case "$opt" in
>  <at>  <at>  -1831,6 +1847,10  <at>  <at>  for opt do
>      --disable-everything)
>      map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
>      ;;
> +    --enable-random=*|--disable-random=*)
> +    action=${opt%%-random=*}
> +    do_random ${action#--} $optval
> +    ;;
>      --enable-*=*|--disable-*=*)
>      eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
>      is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"

lgtm

Janne