[Evolution] compiling 1.4.5 for slackware 9.1

[David Fenlon <david fenlon687 fsnet co uk>]

The configuration goes O.K. (got all the dependancies sorted.

But the compile fails with
e-dialog-widgets.c:183: syntax error before "GtkOptionMenu"
e-dialog-widgets.c: In function `hook_option_menu':
e-dialog-widgets.c:190: `value_var' undeclared (first use in this function)
e-dialog-widgets.c:190: (Each undeclared identifier is reported only once
e-dialog-widgets.c:190: for each function it appears in.)
e-dialog-widgets.c:191: `info' undeclared (first use in this function)
e-dialog-widgets.c:193: `omenu' undeclared (first use in this function)
e-dialog-widgets.c:197: `dialog' undeclared (first use in this function)
e-dialog-widgets.c:201: warning: implicit declaration of function 
`gtk_option_menu_get_menu'
e-dialog-widgets.c: At top level:
e-dialog-widgets.c:210: syntax error before '*' token
e-dialog-widgets.c: In function `get_option_menu_value':
e-dialog-widgets.c:215: `value_var' undeclared (first use in this function)
e-dialog-widgets.c:216: `info' undeclared (first use in this function)
e-dialog-widgets.c:218: `omenu' undeclared (first use in this function)
e-dialog-widgets.c: In function `e_dialog_option_menu_set':
e-dialog-widgets.c:572: warning: implicit declaration of function 
`GTK_IS_OPTION_MENU'
e-dialog-widgets.c:578: warning: implicit declaration of function 
`gtk_option_menu_set_history'
e-dialog-widgets.c:578: warning: implicit declaration of function 
`GTK_OPTION_MENU'
make[4]: *** [e-dialog-widgets.lo] Error 1

Any help appreciated.
                        Thanks
                                        Dave.