[ng] coverage: mixing Fortran and C++

* t/cxx-fortran.sh: New, check that Automake can build and link a program
mixing C++ with Fortran 77 (the C++ 'main()' calling a Fortran function,
more precisely).

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

diff --git a/t/cxx-fortran.sh b/t/cxx-fortran.sh
new file mode 100755 (executable)
index 0000000..b2138db
--- /dev/null
+++ b/t/cxx-fortran.sh
@@ -0,0 +1,69 @@
+#! /bin/sh
+# Copyright (C) 2006-2012 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/>.
+
+# Test mixing Fortran 77 and C++.
+
+# For now, require the GNU compilers, to avoid possible spurious failure.
+required='gfortran g++'
+. ./defs || Exit 1
+
+cat >> configure.ac << 'END'
+AC_PROG_CXX
+AC_PROG_F77
+AC_OUTPUT
+END
+
+cat > Makefile.am << 'END'
+noinst_PROGRAMS = foo
+foo_SOURCES = new.cc old.f
+END
+
+cat > new.cc << 'END'
+#include <iostream>
+using namespace std;
+extern "C" { int cube_ (int *); }
+int main (void)
+{
+   int n = 3;
+   cout << "The Cube of " << n << " is " << cube_ (&n) << endl;
+   return 0;
+}
+END
+
+cat > old.f << 'END'
+      INTEGER FUNCTION CUBE(N)
+C     COMPUTES AND RETURN THE CUBE OF THE INTEGER N
+      CUBE=N*N*N
+      RETURN
+      END
+END
+
+$ACLOCAL
+$AUTOCONF
+$AUTOMAKE -a
+# The C++ linker should be preferred.
+grep '\$(FCLINK)' Makefile.in && Exit 1
+grep '.\$(CXXLINK)' Makefile.in
+
+./configure
+$MAKE
+
+if cross_compiling; then :; else
+  ./foo
+  test "$(./foo)" = "The Cube of 3 is 27"
+fi
+
+$MAKE distcheck