Messages in this thread |  | | | Date | Mon, 28 Oct 2002 16:32:07 -0600 (CST) | | From | Kai Germaschewski <> | | Subject | Re: 2.5.44: what's .tmp_export-objs for? |
| |
On Mon, 28 Oct 2002, Rob Landley wrote:
> I accidentally did a 2.5.44 kernel build as root rather than my normal user, > so I'm trying to see what clean steps I need to so (as root) to be able to > build the tree again. A normal make clean failed (permission denied deleting > files), so I did an su and a make clean. Exit back to normal user, make > clean, life is good, do a make dep, and it complains about the directory > .tmp_export-objs. > > 1) Why does the build process use a hidden directory?
The "make dep" stage generates .ver files for all files listed in */Makefile:export-objs. At the same time, it creates a zero-length file corresponding to each .ver file in .tmp_export-objs, which are needed to afterwards construct include/linux/modversions.h, which is basically
#include <linux/module/path/obj.ver>
for all objects we created the .ver files for earlier. Basically, .tmp_export-objs is a complicated way to create a list of filenames, the reason we cannot just append names to one file is that multiple 'make's may run in parallel (make -j), so that appending to a single file would be racy.
> 2) Why isn't make clean removing something with "tmp" in the name?
Well, for some traditional reasons, there is a distinction between "make clean" and "make mrproper", where only the latter really removes everything.
--Kai
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |