The ../database/database.h dependency is already described (only when
necessary) inside the Depend file for the specific complication unit.
Not all objects are affected by database.h changes, so it doesn't need
to be forced as a dependency for all OBJS.
Depend itself was never rebuilt when a source file changed. This now
happens, however technically the superior MAKE process needs to restart
so it includes the new updated copy of Depend file we just updated.
However in practice when developing, modifying #include directives does
not happen often and doing 'make; make' will fix the issue performing
an incremental build both times. So a minor caveat.
Previously when a single source file was changed the entire module was
recompiled, but we have a Depends file to manage the incremental build
problem and we are not really using it (if we always recompile the entire
module due to any one file change, there would be no need for Depends).
Now when developing, a single *.c file change results in the Depends
being rebuilt, then the single file compiled, then the module relinked.
This is exactly the kind of incremental build speedup having a Depends
file is designed to achieve.
Additionally the use of a direct pipeline to create the file does not
manage error scenarios. MAKE itself is driven by file existance and
their timestamps for targets, so even if 'make depend' failed, it
would still create an output file that MAKE can not distunguish
between a well formed (possibly empty) Depend file and an incorrectly
created partial. So building in a *.tmp file first and only if all the
commands are successful then rename to target filename. This has the
effect of making 'make depend' able to fail now.
* Adds Python 3 to macOS requirements
* Gate include of `DEPEND_FILE` in `rules.mak` on whether the target is `clean` or not (the include isn't pre-processed; it will attempt to build everything in the include otherwise)
* Make `makedbh` a configurable file- the shebang now uses the discovered path for Python3
This is a series of updates to make building magic far less of a headache:
* Drop `csh`/`tcsh` dependency and detection from `./configure`.
* Rewrite makedbh in Python.
* Rewrite printmans in POSIX sh.
* Stop deleting Depend before every compile (which causes some files to recompile and thus increases recompile times significantly)
* Add Depend to CLEANS in scripts/defs.mak.in
* Turn POSIX suffix rule in magic/rules.mak to a pattern rule with proper prerequisites
instead created a dependency on database.h for compiling any
source file. This should (I hope) avoid conflicts when running
"make" with the "-j" option for parallel compilation.
Darryl L. Miles
Donn
Tim Edwards