This option, when added via
  TESTS_ENVIRONMENT = [...] $(top_builddir)/run --test
allows us to run the tests and only print the full output (including
debugging etc) when the test fails.

This function was first added to Ruby in 1.8.7.

RHEL 5-era autoconf did not define these, so define them manually
when they are missing.

Define builddir as '.'  The scripts require this.  It won't work
in the srcdir != builddir case, but we don't care about that for
RHEL 5.

This commit also moves the builddir / abs_srcdir variable setting
above the include of subdir-rules.mk, in case that include uses
these variables.

Useful script:

  for f in $(find -name Makefile.am | xargs fgrep '$(abs_srcdir)' -l) ; do
    if ! grep -q '^abs_srcdir' $f; then
      echo missing in $f
    fi
  done

This reverts commit fd7a5a8bbdc69b9d2a92f6d05ac555334d0516bf.

This breaks Ruby 1.8.7 in Fedora 16.

I have checked, and this works with Ruby 1.8 as well.

I noticed some uses of ${srcdir} in shell scripts.
That is almost always better written as $srcdir.
The patch below converts most such variable references.
Here are the few remaining candidates:

$ git grep -i -E '\$\{[a-zA-Z_0-9]+\}'|grep -v Makefile.in.in
configure.ac:        JAR_INSTALL_DIR=\${prefix}/share/java
configure.ac:        JNI_INSTALL_DIR=\${libdir}
debian/rules:   for TEST in ${DEBIAN_SKIP_TEST}; do \
debian/rules:#          mv $${mod} $$(dirname $${mod})/libguestfsmod.so; \
java/Makefile.am:libguestfs_jar_DATA = libguestfs-${VERSION}.jar
java/Makefile.am:libguestfs-${VERSION}.jar: $(libguestfs_jar_class_files)
perl/lib/Sys/Guestfs/Lib.pm:                      "-f", '${Package} ${Version} ${Architecture} ${Status}\n',
perl/typemap:            croak (\"${Package}::$func_name(): called on a closed handle\");
perl/typemap:        croak (\"${Package}::$func_name(): $var is not a blessed HV reference\");
tests/data/Makefile.am:   echo "$${i}abcdefghijklmnopqrstuvwxyz"; \

We could change all of those, too, except the ones in configure.ac
and Makefile.am, since they refer to Make variables.  Even those
should be changed, but to use the preferred Makefile notation:
$(prefix), $(libdir), $(VERSION).

>From a86770ecd45666232a94d76c8725c8f9b1c76e3a Mon Sep 17 00:00:00 2001
From: Jim Meyering <meyering@redhat.com>
Date: Mon, 23 Jan 2012 11:15:12 +0100
Subject: [PATCH libguestfs] maint: use $var notation rather than ${var} when
 possible

The only case to avoid in a shell script is when the byte after the
"}" is word-constituent, and concatenating it would thus change the
name of the variable.

These changes were induced by running this command:
  git grep -l -i -E '\$\{(srcdir|md)' \
    |xargs perl -pi -e 's/\$\{(srcdir|md)\}($|\w)/\$$1$2/gi'

The "g" was needed because there was one line with two instances.
The "i" is to handle ${SRCDIR}.  The ($|\w) ensures that concatenating
whatever follows the "}" won't change semantics.

* gobject/run-bindtests: Use "$srcdir", not "${srcdir}".
* haskell/run-bindtests: Likewise.
* java/run-bindtests: Likewise.
* ocaml/run-bindtests: Likewise.
* perl/run-bindtests: Likewise.
* python/run-bindtests: Likewise.
* ruby/run-bindtests: Likewise.
* tests/guests/guest-aux/make-debian-img.sh: Likewise, but $SRCDIR.
* tests/guests/guest-aux/make-ubuntu-img.sh: Likewise.
* tests/guests/guest-aux/make-windows-img.sh: Likewise.
* tests/md/test-mdadm.sh: Likewise, but $md.

(Includes fix by RWMJ)

Update all copyright dates to 2012.