Function svn_client_merge 

pub unsafe extern "C" fn svn_client_merge(
    source1: *const c_char,
    revision1: *const svn_opt_revision_t,
    source2: *const c_char,
    revision2: *const svn_opt_revision_t,
    target_wcpath: *const c_char,
    recurse: svn_boolean_t,
    ignore_ancestry: svn_boolean_t,
    force: svn_boolean_t,
    dry_run: svn_boolean_t,
    ctx: *mut svn_client_ctx_t,
    pool: *mut apr_pool_t,
) -> *mut svn_error_t

Similar to svn_client_merge2(), but with @a merge_options set to NULL.

@deprecated Provided for backwards compatibility with the 1.3 API.