init.m4: add probe to check "rm -f" without args work

See automake bug#10828.

POSIX will say in a future version that running "rm -f" with no argument
is OK: <http://austingroupbugs.net/view.php?id=542>).

We want to be able to make that assumption in our Makefile recipes.
So we introduce an aggressive probe to check that the usage we want is
actually supported "in the wild" to an acceptable degree.

* m4/init.m4 (AM_INIT_AUTOMAKE): Implement the probe.  To make any issue
more visible, cause the running configure to be aborted by default if
the 'rm' program in use doesn't match our expectations; the user can
still override this though, by setting the ACCEPT_INFERIOR_RM_PROGRAM
environment variable to "yes".

* t/spy-rm.tap: Update heading comments.
* t/rm-f-probe.sh: New test.
* t/list-of-tests.mk: Add it.
* PLANS/rm-f-without-args.txt: Adjust.

Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>

1 files changed, 74 insertions, 0 deletions

diff --git a/t/rm-f-probe.sh b/t/rm-f-probe.sh
new file mode 100755
index 000000000..1cb220aa0
--- /dev/null
+++ b/t/rm-f-probe.sh
@@ -0,0 +1,74 @@
+#! /bin/sh
+# Copyright (C) 2013 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Verify our probe that checks that "rm -f" doesn't complain if called
+# without file operands works as expected.  See automake bug#10828.
+
+. test-init.sh
+
+echo AC_OUTPUT >> configure.ac
+: > Makefile.am
+
+$ACLOCAL
+$AUTOCONF
+$AUTOMAKE
+
+mkdir bin
+cat > bin/rm <<'END'
+#!/bin/sh
+set -e; set -u;
+PATH=$original_PATH; export PATH
+rm_opts=
+while test $# -gt 0; do
+  case $1 in
+    -*) rm_opts="$rm_opts $1";;
+     *) break;;
+  esac
+  shift
+done
+if test $# -eq 0; then
+  echo "Oops, fake rm called without arguments" >&2
+  exit 1
+else
+  exec rm $rm_opts "$@"
+fi
+END
+chmod a+x bin/rm
+
+original_PATH=$PATH
+PATH=$(pwd)/bin$PATH_SEPARATOR$PATH
+export PATH original_PATH
+
+rm -f && exit 99 # Sanity check.
+
+./configure 2>stderr && { cat stderr >&2; exit 1; }
+cat stderr >&2
+
+grep "'rm' program.* unable to run without file operands" stderr
+$FGREP "tell bug-automake@gnu.org about your system" stderr
+$FGREP "install GNU coreutils" stderr
+$EGREP "(^| |')ACCEPT_INFERIOR_RM_PROGRAM($| |')" stderr
+
+ACCEPT_INFERIOR_RM_PROGRAM=yes; export ACCEPT_INFERIOR_RM_PROGRAM
+
+./configure
+$MAKE
+$MAKE distcheck
+
+# For the sake of our exit trap.
+PATH=$original_PATH; export PATH
+
+: