libgpgme: handle argp-standalone

libgpgme has an internal implementation of argp parsing for when the
libc lacks such an implementation (i.e. uClibc).
However if it detects argp.h the internal implementation is disabled and
for a uClibc-based toolchain that breaks the build.
This happens when argp-standalone is installed since libgpgme never
tries to link to libargp.

Make it link against libargp, which also saves some target size. Fixes:
http://autobuild.buildroot.net/results/33c/33c5776d2b3f7fa276a27f7602eb71c4d77c7b62/

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
dropwatch: fix build failure with binutils 2.23.1+

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
dropwatch: link with libintl if present

binutils libbfd links to libintl if present, so dropwatch needs it too.
Ugly hardcoded LDFLAGS, but then that's what the dropwatch Makefile
does. Fixes:
http://autobuild.buildroot.net/results/549/54917e7943143e47263b60b4eee3dfc6f0801407/

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
linux: Fix uImage with appended DTs generation

Fixes bug #5516 - appended device tree blobs on uImage fails

Before version 3.7 of the kernel, building the zImage and then the
uImage will rewrite the zImage in the process, removing the device tree
we just appended.

Use mkimage to append the device tree to the uImage and rebuild the
headers directly.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Fix building initramfs kernel with appended dtb

The target for building the kernel with a cpio initramfs is not
calling the append dtb commands, creating a final kernel image
without an appended dtb. Instead it needs to call kernel make on
the intermediate target, then call the append dtb commands
to produce the final image as the primary kernel build target
does.

Signed-off-by: Nathan Ford <nford@westpond.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Install DTB as part of images install command

When installing DTB to the images directory, do this as part of the image
install commands rather than the target install commands.

Signed-off-by: Reuben Dowle <reuben.dowle@4rf.com.az>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
linux: update help text of BR2_LINUX_KERNEL_INSTALL_TARGET

The BR2_LINUX_KERNEL_INSTALL_TARGET option not only copies the kernel
image to /boot, but also the DTBs, if such DTBs are generated by the
build process. It makes sense to mention that in the help text of this
option.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Add support of Linaro GCC