Move the ODBC wide support in its own file

Enabling wide functions can break ascii one, like DriveConnect()

NEWS

@@ -1,3 +1,7 @@
+Version 0.7.1
+=============
+An experimental version of ODBC driver is now available: libmdbodbcW.so
+
 Version 0.3
 ===========
 The organization of the project files has changed a bit from that last release.

configure.ac

@@ -138,6 +138,8 @@ if test "x$HAVE_ODBC" = "xtrue"; then
 	OPTDIRS="$OPTDIRS odbc"
 fi
 
+dnl Conditionally build odbc wide version
+AM_CONDITIONAL(ICONV, test "$am_cv_func_iconv" = "yes")
 
 dnl check for glib/gtk/gnome
 PKG_CHECK_MODULES(GLIB, glib-2.0, ,

src/odbc/Makefile.am

@@ -1,8 +1,15 @@
 noinst_PROGRAMS	=	unittest
 lib_LTLIBRARIES	=	libmdbodbc.la
 AM_CPPFLAGS	=	-I$(top_srcdir)/include $(GLIB_CFLAGS) $(ODBC_CFLAGS)
-libmdbodbc_la_SOURCES=	odbc.c connectparams.c mdbodbc.h connectparams.h
-libmdbodbc_la_LIBADD=	../libmdb/libmdb.la ../sql/libmdbsql.la
-libmdbodbc_la_LDFLAGS = -avoid-version -export-symbols-regex '^(SQL|ODBCINST)'
+libmdbodbc_la_SOURCES	= odbc.c connectparams.c mdbodbc.h connectparams.h
+libmdbodbc_la_LIBADD	= ../libmdb/libmdb.la ../sql/libmdbsql.la
+libmdbodbc_la_LDFLAGS	= -avoid-version -export-symbols-regex '^(SQL|ODBCINST)'
+if ICONV
+lib_LTLIBRARIES += libmdbodbcW.la
+libmdbodbcW_la_SOURCES	= $(libmdbodbc_la_SOURCES)
+libmdbodbcW_la_LIBADD	= $(libmdbodbc_la_LIBADD)
+libmdbodbcW_la_LDFLAGS	= $(libmdbodbc_la_LDFLAGS)
+libmdbodbcW_la_CFLAGS	= -D ENABLE_ODBC_W=1
+endif
 LIBS	=	@LEXLIB@ $(GLIB_LIBS) $(ODBC_LIBS)
 unittest_LDADD	=	libmdbodbc.la ../libmdb/libmdb.la ../sql/libmdbsql.la

src/odbc/odbc.c

@@ -16,11 +16,6 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#ifdef HAVE_ICONV
-/* Disable ODBC wide char if iconv is not available */
-#define ENABLE_ODBC_W
-#endif
-
 #ifdef ENABLE_ODBC_W
 #define SQL_NOUNICODEMAP
 #define UNICODE