If it doesn't exist, provide a definition based on memcpy.

Signed-off-by: Ulf Hermann <ulf.hermann@qt.io>

This change also creates a new header file libeu.h to provide the
prototypes for the function of libeu. That hides the definition of function
crc32, which can conflict with zlib, from libelf. It also prevents mistakes
to refer those functions from a component which doesn't link with libeu,
such as libelf.

Signed-off-by: Akihiko Odaki <akihiko.odaki.4i@stu.hosei.ac.jp>

We already require -std=gnu99 and old-style function definitions might
hide some compiler warnings.

Signed-off-by: Mark Wielaard <mjw@redhat.com>

* Change name from "Red Hat elfutils" to "elfutils".
* Update license of standalone tools and test from GPLv2 to GPLv3+.
* Change license of libraries from GPLv2+exception to GPLv2/LGPLv3+.
* Add Developer Certificate of Origin based contributor policy.

top-level:

- COPYING: Upgraded from GPLv2 to GPLv3.
- CONTRIBUTING, COPYING-GPLv2, COPYING-LGPLv3: New files.
- NEWS: Added note about new contribution and license policy.
- Makefile.am: Updated to GPLv3, added new files to EXTRA_DIST.
- configure.ac: Update to GPLv3, changed AC_INIT name to 'elfutils'.

backends, lib, libasm, libcpu, libdw, libdwfl, libebl, libelf:

- All files updated to GPLv2/LGPLv3+. Except some very small files
  (<5 lines) which didn't have any headers at all before, the linker
  .maps files and the libcpu/defs files which only contain data and
  libelf/elf.h which comes from glibc and is under LGPLv2+.

config:

- elfutils.spec.in: Add new License: headers and new %doc files.
- Update all license headers to GPLv2/LGPLv3+ for files used by libs.

src, tests:

- All files updated to GPLv3+. Except for the test bz2 data files, the
  linker maps and script files and some very small files (<5 lines)
  that don't have any headers.

Signed-off-by: Richard Fontana <rfontana@redhat.com>
Signed-off-by: Mark Wielaard <mjw@redhat.com>

            to branch 'com.redhat.elfutils' (head 76e26cb54695fd3b21ee8fb5be3036bd68200633)