error.h isn't standard and so isn't part of the musl C library.
To easy future porting, consolidate the inclusion of error.h into system.h.

https://sourceware.org/bugzilla/show_bug.cgi?id=21008

Signed-off-by: Ross Burton <ross.burton@intel.com>

Use __attribute__ ((fallthrough)) to indicate switch case fall through
instead of a comment. This ensures that the fallthrough warning is not
triggered even if the file is pre-processed (hence stripping the
comments) before it is compiled.

The actual fallback implementation is hidden behind a FALLBACK macro in
case the compiler doesn't support it.

Finally, the -Wimplict-fallthrough warning was upgraded to only allow
the attribute to satisfy it; a comment alone is no longer sufficient.

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>

Rename version.c so that the implementation is called after the header
and the header doesn't clash with the toplevel version.h. print_version
depends on argp and is only used in the tools.

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

We only need it in nm.c and objdump.c, but it pulls in argp as
dependency. By dropping it from libeu.h, the libraries can be
compiled without argp.

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

fedorahosted used to be our home, but we are now hosted at sourceware.

Change the elfutils project home to http://elfutils.org/
Point hosted services (email, release, git, bug tracker and web pages)
to https://sourceware.org/elfutils/

Move design notes from README to NOTES.
Add URLs for home, releases, bugs, git and mailinglist to README.

Make the --version output of all tools the same by using a common
print_version function and update the publicly shown copyright holder
to the elfutils developers.

Signed-off-by: Mark Wielaard <mark@klomp.org>

GCC7 will have a new -Wimplicit-fallthrough warning. It did catch one
small buglet in elflint option procession. So it seems useful to enable
to make sure all swatch case fallthroughs are deliberate.

Add configure check to detect whether gcc support -Wimplicit-fallthrough
and enable it. Add fixes and explicit fallthrough comments where necessary.

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

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>

mtrace is a GNU extension not supported by uClibc and it's believed to
not be really used. Drop mtrace() calls and #include <mcheck.h>.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

The date didn't really add much information (it is the day on which the
code happened to be compiled) and it prevents creating reproducible builds.

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