+# Print warnings (e.g., about skipped and failed tests) to this file number.
+# Override by defining to say, 9, in init.cfg, and putting say,
+# "export ...ENVVAR_SETTINGS...; exec 9>&2; $(SHELL)" in the definition
+# of TESTS_ENVIRONMENT in your tests/Makefile.am file.
+# This is useful when using automake's parallel tests mode, to print
+# the reason for skip/failure to console, rather than to the .log files.
+: ${stderr_fileno_=2}
+
+warn_ () { echo "$@" 1>&$stderr_fileno_; }
+fail_ () { warn_ "$ME_: failed test: $@"; Exit 1; }
+skip_ () { warn_ "$ME_: skipped test: $@"; Exit 77; }
+framework_failure_ () { warn_ "$ME_: set-up failure: $@"; Exit 99; }
+
+# Sanitize this shell to POSIX mode, if possible.
+DUALCASE=1; export DUALCASE
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
+ emulate sh
+ NULLCMD=:
+ alias -g '${1+"$@"}'='"$@"'
+ setopt NO_GLOB_SUBST
+else
+ case `(set -o) 2>/dev/null` in
+ *posix*) set -o posix ;;
+ esac
+fi
+
+# We require $(...) support unconditionally.
+# We require a few additional shell features only when $EXEEXT is nonempty,
+# in order to support automatic $EXEEXT emulation:
+# - hyphen-containing alias names
+# - we prefer to use ${var#...} substitution, rather than having
+# to work around lack of support for that feature.
+# The following code attempts to find a shell with support for these features.
+# If the current shell passes the test, we're done. Otherwise, test other
+# shells until we find one that passes. If one is found, re-exec it.
+# If no acceptable shell is found, skip the current test.
+#
+# The "...set -x; P=1 true 2>err..." test is to disqualify any shell that
+# emits "P=1" into err, as /bin/sh from SunOS 5.11 and OpenBSD 4.7 do.
+#
+# Use "9" to indicate success (rather than 0), in case some shell acts
+# like Solaris 10's /bin/sh but exits successfully instead of with status 2.
+
+# Eval this code in a subshell to determine a shell's suitability.
+# 10 - passes all tests; ok to use
+# 9 - ok, but enabling "set -x" corrupts app stderr; prefer higher score
+# ? - not ok
+gl_shell_test_script_='
+test $(echo y) = y || exit 1
+score_=10
+if test "$VERBOSE" = yes; then
+ test -n "$( (exec 3>&1; set -x; P=1 true 2>&3) 2> /dev/null)" && score_=9
+fi
+test -z "$EXEEXT" && exit $score_
+shopt -s expand_aliases
+alias a-b="echo zoo"
+v=abx
+ test ${v%x} = ab \
+ && test ${v#a} = bx \
+ && test $(a-b) = zoo \
+ && exit $score_
+'
+
+if test "x$1" = "x--no-reexec"; then
+ shift
+else
+ # Assume a working shell. Export to subshells (setup_ needs this).
+ gl_set_x_corrupts_stderr_=false
+ export gl_set_x_corrupts_stderr_
+
+ # Record the first marginally acceptable shell.
+ marginal_=
+
+ # Search for a shell that meets our requirements.
+ for re_shell_ in __current__ "${CONFIG_SHELL:-no_shell}" \
+ /bin/sh bash dash zsh pdksh fail
+ do
+ test "$re_shell_" = no_shell && continue
+
+ # If we've made it all the way to the sentinel, "fail" without
+ # finding even a marginal shell, skip this test.
+ if test "$re_shell_" = fail; then
+ test -z "$marginal_" && skip_ failed to find an adequate shell
+ re_shell_=$marginal_
+ break
+ fi
+
+ # When testing the current shell, simply "eval" the test code.
+ # Otherwise, run it via $re_shell_ -c ...
+ if test "$re_shell_" = __current__; then
+ # 'eval'ing this code makes Solaris 10's /bin/sh exit with
+ # $? set to 2. It does not evaluate any of the code after the
+ # "unexpected" first `('. Thus, we must run it in a subshell.
+ ( eval "$gl_shell_test_script_" ) > /dev/null 2>&1
+ else
+ "$re_shell_" -c "$gl_shell_test_script_" 2>/dev/null
+ fi
+
+ st_=$?
+
+ # $re_shell_ works just fine. Use it.
+ test $st_ = 10 && break
+
+ # If this is our first marginally acceptable shell, remember it.
+ if test "$st_:$marginal_" = 9: ; then
+ marginal_="$re_shell_"
+ gl_set_x_corrupts_stderr_=true
+ fi
+ done
+
+ if test "$re_shell_" != __current__; then
+ # Found a usable shell. Preserve -v and -x.
+ case $- in
+ *v*x* | *x*v*) opts_=-vx ;;
+ *v*) opts_=-v ;;
+ *x*) opts_=-x ;;
+ *) opts_= ;;
+ esac
+ exec "$re_shell_" $opts_ "$0" --no-reexec "$@"
+ echo "$ME_: exec failed" 1>&2
+ exit 127
+ fi
+fi
+
+test -n "$EXEEXT" && shopt -s expand_aliases
+
+# Enable glibc's malloc-perturbing option.
+# This is useful for exposing code that depends on the fact that
+# malloc-related functions often return memory that is mostly zeroed.
+# If you have the time and cycles, use valgrind to do an even better job.
+: ${MALLOC_PERTURB_=87}
+export MALLOC_PERTURB_