tests: can fake a compiler not grasping "-c -o" -- globally in all tests

The ability to easily do so will be quite important in upcoming changes
about C compilation handling and semantics of the 'subdir-objects'
option.  Refer to the extensive discussion about automake bug#13378 for
more details: <http://debbugs.gnu.org/cgi/bugreport.cgi?bug=13378>.

See also commit 'v1.13.1-34-g744cd57' of 2013-01-08, "coverage: compile
rules used "-c -o" also with losing compilers".

* t/ax/cc-no-c-o.in: New, a "C compiler" that chokes when the '-c' and
'-o' options are passed together to it on the command line.
* Makefile.am (t/ax/cc-no-c-o): Generate this script from it.
(noinst_SCRIPTS, CLEANFILES): Add it.
(EXTRA_DIST): Add 't/ax/cc-no-c-o.in'.
(check-cc-no-c-o): New target, runs the whole testsuite with 'cc-no-c-o'
as the C compiler (bot GNU and non-GNU).
* .gitignore: Update.
* t/ccnoco.sh: Use the new script instead of duplicating it.
* t/ccnoco3.sh: Likewise.
* t/ccnoco4.sh: Likewise.
* t/self-check-cc-no-c-o.sh: New testsuite self-check.
* t/list-of-tests.mk: Adjust.

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

1 files changed, 35 insertions, 0 deletions

diff --git a/t/self-check-cc-no-c-o.sh b/t/self-check-cc-no-c-o.sh
new file mode 100755
index 000000000..69809b77f
--- /dev/null
+++ b/t/self-check-cc-no-c-o.sh
@@ -0,0 +1,35 @@
+#! /bin/sh
+# Copyright (C) 2012-2013 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/>.
+
+# Check that our fake "C compiler" that doesn't grasp the '-c' and
+# '-o' command-line options passed together, used to enhance testsuite
+# coverage.
+
+required=gcc # Our fake compiler uses gcc.
+am_create_testdir=empty
+. test-init.sh
+
+CC=$am_testaux_builddir/cc-no-c-o; export CC
+
+echo 'int main (void) { return 0; }' > foo.c
+$CC -c foo.c
+test -f foo.o || test -f foo.obj
+$CC -c -o bar.o foo.c 2>stderr && { cat stderr >&2; exit 1; }
+cat stderr >&2
+grep "both '-o' and '-c' seen on the command line" stderr
+test ! -e bar.o && test ! -e bar.obj
+
+: