https://github.com/tnmurphy/gmake-experimental/tree/feature/jprint
I've added the the hash table stats for files and the string cache and so
on. At this point I think I have done almost everything that
--print-database did. There's probably something missing but most of it is
there.
One now gets stuff like this:
"strcachestats": {
"buffers": {
"count": 3,
"full": 2,
"total_strings": 1272,
"total_size": 23214,
"average_size": 18
},
....
"hashtable": {
"fill": 1272,
"size": 8192,
"load_percent": 16,
"rehash": 0,
"lookups": 17653,
"collisions": 827,
"collision_percent": 5
}
I haven't got a good set of test makefiles - I'm just using make's own
makefile. This means that some features are not getting tried out properly.
I've got a python module with classes that match the json so one can write
programs to traverse the data. I'm not happy with it yet so I haven't
included it. In theory one could use this to start doing "useful" things -
whatever your imagination comes up with. I keep thinking along the lines
of being able to read in an old makefile and write out some new makefile
using a strategy I prefer or even converting a makefile to some alternate
build system.
Other uses could be to get at the line number and filename information to
help one index variables or targets in a large makefile - perhaps in some
editor.
The stats also might help some people to see why they're getting poor
performance - if they're using really large makefiles perhaps.
Anyhow we'll see.
Best regards,
Tim Murphy
On Fri, 24 Oct 2025 at 19:16, Tim Murphy <[email protected]> wrote:
> https://github.com/tnmurphy/gmake-experimental/tree/feature/jprint
>
> On Fri, 24 Oct 2025 at 12:30, Tim Murphy <[email protected]> wrote:
>
>>
>> What's still not done:
>> Directories are not dumped in json - this is a bit of a pain but I will
>> get to it when I'm desperate and there's absolutely nothing easy or fun
>> left to do :-).
>>
>> OK, Directories now get dumped as json like so:
> "directories": {
> "RCS": {
> "status": "stat_fail"
> },
> "src": {
> "status": "ok",
> "device": 2100,
> "inode": 32708350,
> "files": 109,
> "impossibilities": 3
> },
> "": {
> "files": 299,
> "impossibilities": 87,
> "directories": 7
> }
> },
>
> The last one is fake. I don't like this much but it contains the stats
> about how many files and directories were found and is incorrect here
> becuase I've shortened the example.
>
> So the vpath info is next and then the string cache stats. After that I'm
> not sure there's anything left. It will then be time to write some
> utilities that can use all this stuff.
>
> Best regards,
>
> Tim Murphy
>
