This script allows you to run simple test C programs from the command line.
This is not a build system, and it never will be.
Again, this is a script for simple tests.
However, if you want to see what size a long is on your system you could run:
$ execat -s long
Or, maybe you want to make sure the following code will multiply the dereferenced pointer instead of dereferencing it twice.
$ execat -m <<EOF
> char *s="\n"; //'\n' = 10
> printf("%d\n", 5 * *p);
> EOF
If you want to compile a simple program from a file you can run this:
$ export P=my_prog
$ execat
Setting $P makes certain flags not work because they expect redirection.
See the manual for how $P works.
This script was inspired by the book 21st Century C 2nd Ed., pg. 31 (ISBN 978-1-491-90389-6). That page was inspired by c99sh. Maybe check those out.