scripts: define ALIGN(x) in scripts' <linux/kernel.h> ...

To make code sharing between utilities in scripts/ and barebox easier,
define ALIGN in the scripts/include/linux/kernel.h as well for
compatibility with the barebox include/linux/kernel.h.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

scripts: removes uses of <asm*/errno.h> in favor of <errno.h> ...

We can't assume <asm/errno.h> to be available on non-Linux hosts.
Furthermore, errno constants values aren't fixed and passing them
to libc perror(3)/strerror (3) would yield wrong results.
Fix this by using the standard <errno.h> header instead.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

scripts: don't depend on system <asm/types.h> ...

If we compile on non-Linux hosts, we can't assume this header to be
available. Thus typedef loff_t and [su](8|16|32|64) ourselves.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

scripts: includes: restrict strlcpy prototype to glibc ...

Defining strlcpy here clashes on macOS, which has some compiler magic
around their strlcpy declaration. Fix this by inverting the check
to declare the prototype only if we are on __GLIBC__. As uClibc may
define __GLIBC__ as well, check for absence of its __UCLIBC__.

This is in-line with what Linux has been doing since 0215d59b15
("tools lib: Reinstate strlcpy() header guard with __UCLIBC__").

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

recursive_action: add ACTION_SORT flag ...

Add a flag to sort directory entries before recursing into them.

Since this part of lib/ is used inside barebox as well as in
scripts/bareboxenv.c, we cannot easily use stringlists from lib/, which
would have made the code a bit nicer.

Signed-off-by: Florian Bäuerle <florian.baeuerle@allegion.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

scripts: Make list implementation usable ...

The list implementation in scripts/ includes poison.h which doesn't
exist. Remove the inclusion and add the defines from poison.h that we
need.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

scripts: Add big endian conversion macros to endian.h ...

Some programs need the big endian macros, add them to andian.h

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

scripts/include: Add ARRAY_SIZE ...

ARRAY_SIZE is another define commonly used in tools. Add it to the
kernel includes.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

scripts: Add common header files for tools ...

This imports the tools/include dir from the Kernel as of 4.5-rc1 to
barebox.
The Kernel has many useful defines and helpers which are often
duplicated in the different tools. Let's create a copy of them
in a common place for all tools.

Some files have been skipped for now as I currently see no use for them:

include/linux/filter.h
include/linux/hash.h
include/linux/rbtree.h
include/linux/rbtree_augmented.h

They can be added later if needed.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>