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, 2 insertions, 19 deletions

diff --git a/t/ccnoco3.sh b/t/ccnoco3.sh
index 7ad5b3bc5..b8dd77c2b 100755
--- a/t/ccnoco3.sh
+++ b/t/ccnoco3.sh
@@ -16,7 +16,7 @@
 
 # Test to make sure 'compile' doesn't call 'mv SRC SRC'.
 
-required=gcc
+required=gcc # For cc-no-c-o.
 . test-init.sh
 
 cat >> configure.ac << 'END'
@@ -43,25 +43,8 @@ int main ()
 }
 END
 
-cat > Mycomp << END
-#!/bin/sh
-
-case " \$* " in
- *\ -c*\ -o* | *\ -o*\ -c*)
-    exit 1
-    ;;
-esac
-
-# Use '$CC', not 'gcc', to honour the compiler chosen
-# by the testsuite setup.
-exec $CC "\$@"
-END
-
-chmod +x Mycomp
-
 # Make sure the compiler doesn't understand '-c -o'
-CC=$(pwd)/Mycomp
-export CC
+CC=$am_testaux_builddir/cc-no-c-o; export CC
 
 $ACLOCAL
 $AUTOCONF