about recompiling

[sjtugjy]

Does there exist some convenient way to recompile the kernel after small changes?
Besides, it seems that recompiling does not find changes of any file.
For example, rumprun/platform/xen/xen/kernel.c.

[kent-mcleod]

Generally I've found re-invoking build-rr.sh to generally be pretty reasonable for detecting and rebuilding changes. At one point I was calling it from a Makefile and only re ran build-rr.sh if any file in the rumprun src tree had changed like so:

# All rumprun source directories.
SRC_DIRECTORIES := app-tools buildrump.sh include lib platform src-netbsd
# Find all source rump files.
RUMPFILES += $(shell find -L $(SRC_DIRECTORIES:%=$(SOURCE_DIR)/%) \( -type f \))
.rump: $(RUMPFILES)
	./build-rr.sh ...
	touch .rump

As for changes to files not getting rebuilt, I found that any changes to files that are included using the preprocessor won't be detected unless you modify the Makefiles to use makedepend or something.