Description:
------------
I'm developing php extension and I need to include some cpp sources outside php dir.
...
PHP_NEW_EXTENSION(module,file1.cpp ../../../Common/file2.cpp ../../../Common/file3.cpp, $ext_shared)
...

After running ./configure Makefile contains
...
shared_objects_module = file1.lo .lo .lo
...

I think the bug is somewhere inside acinclude.m4 in function PHP_ADD_SOURCES_X

Test script:
---------------
PHP_ARG_ENABLE(test, test,
[  --enable-test         ])

if test "$PHP_TEST" != "no"; then
  PHP_NEW_EXTENSION(test, file1.cpp ../../../Common/file2.cpp ../../../Common/file3.cpp, $ext_shared)
  AC_DEFINE(HAVE_TEST, 1, [Whether you have test])
fi

Expected result:
----------------
Makefile contains
...
shared_objects_module = file1.lo ../../../Common/file2.lo ../../../Common/file3.lo
...

Actual result:
--------------
shared_objects_module = file1.lo .lo .lo