Add autotools configuration.

This patch adds a basic auto-tools configuration environment for the
bootwrapper consisting of the configure.ac file and the Makefile.am
file.

The configure.ac file includes several options and checks:
  - Ensure that an AArch64 compiler is used.
  - Add the mandatory --with-kernel-dir option that sets KERN_DIR.
  - Check that the correct base dtb file exists in KERN_DIR.
  - Add an option, --with-initrd, that allows a user to specify an
    initrd file to embed in the image.
  - Check for a working dtc and set DTC to the full-path to the
    executable.
  - Create the necessary symbolic links to the relevant kernel files.

The Makefile.am file includes several changes:

- Use a prebuilt dtb rather than a dts, which is decompiled to inject
  the chosen node.
- Use the configured compiler tool names.
- Use the configured SED program rather than assuming it is in PATH.

Signed-off-by: Matthew Leach <matthew.leach@arm.com>
[Mark: use dtb, add options, fix style issues, remove src/]
Signed-off-by: Mark Rutland <mark.rutland@arm.com>

1 files changed, 14 insertions, 1 deletions

diff --git a/.gitignore b/.gitignore
index f63ca94..4dfd7fc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,19 @@
 *.dts
 *.dtsi
 *.o
-Image
+aclocal.m4
+autom4te.cache/
+config.guess
+config.log
+config.status
+config.sub
+configure
 dtc
+fdt.dtb
+Image
+install-sh
+Makefile
+Makefile.in
+missing
 model.lds
+patches/