Re: add option to generate dependency graph

[Lynn Lin]

We can generate some data format which describe dependency,then we can
use graphviz to get dependency graph

On 8/19/10, Luke Shumaker <address@hidden> wrote:
>> Hi,
>>     is that possible that we can add an option to "make" that we can
>> generatge dependency graph? This will help us to debug issues (I know
>> we already have --debug  and --print-data-base option)
>>
>>
>> Thanks
>> Lynn
>
> Since the dependency graph is more complex than just a tree (lines must
> cross) this is difficult to do with ASCII output; if you were to patch
> make to print out dependencies of files as it processes them, you would
> end up with many ``This part of the tree has already been printed''
> messages.
>
> Running the command:
>   make YOUR_ARGS -pqs|sed -n 's/.$/& /;/\# Not a
> target:/N;/^[^\t#=%][^#=%]*:[^=]/p'
>
> should give you a good simple list of targets and their dependencies.
> Given the proper graphing software, it should be trivial to generate a
> graph from this data.
>
> ~ LukeShu
>
>