Make mcal buildable as shared module

ext/mcal/Makefile.in

@@ -1,5 +1,7 @@
 
 LTLIBRARY_NAME    = libmcal.la
 LTLIBRARY_SOURCES = php_mcal.c
+LTLIBRARY_SHARED_NAME = mcal.la
+LTLIBRARY_SHARED_LIBADD = $(MCAL_SHARED_LIBADD)
 
 include $(top_srcdir)/build/dynlib.mk

ext/mcal/config.m4

@@ -1,25 +1,18 @@
 dnl $Id$
 
-AC_MSG_CHECKING(for MCAL support)
-AC_ARG_WITH(mcal,
-[  --with-mcal[=DIR]       Include MCAL support.],
-[
-  if test "$withval" != "no"; then
-    if test "$withval" = "yes"; then
-      MCAL_DIR=/usr/local
-    else
-      MCAL_DIR=$withval
-    fi
-    
-    AC_ADD_INCLUDE($MCAL_DIR)
-    AC_ADD_LIBRARY_WITH_PATH(mcal, $MCAL_DIR)
-    AC_DEFINE(HAVE_MCAL,1,[ ])
-    PHP_EXTENSION(mcal)
-    AC_MSG_RESULT(yes)
+PHP_ARG_WITH(mcal,for MCAL support,
+[  --with-mcal[=DIR]       Include MCAL support.])
+
+if test "$PHP_MCAL" != "no"; then
+  if test "$PHP_MCAL" = "yes"; then
+    MCAL_DIR=/usr/local
   else
-    AC_MSG_ERROR(no)
+    MCAL_DIR=$PHP_MCAL
   fi
-],[
-  AC_MSG_RESULT(no)
-])
-
+    
+  AC_ADD_INCLUDE($MCAL_DIR)
+  AC_ADD_LIBRARY_WITH_PATH(mcal, $MCAL_DIR, MCAL_SHARED_LIBADD)
+  PHP_SUBST(MCAL_SHARED_LIBADD)
+  AC_DEFINE(HAVE_MCAL,1,[ ])
+  PHP_EXTENSION(mcal,$ext_shared)
+fi