The code on the trunk gives a bunch of warnings:
Building shared: mod_session.la mod_session_cookie.la mod_session_crypto.la mod_session_dbd.la mod_session_cookie.c:59: warning: no previous prototype for 'ap_session_cookie_save' mod_session_cookie.c:108: warning: no previous prototype for 'ap_session_cookie_load' mod_session.c:302: warning: no previous prototype for 'ap_session_identity_encode' mod_session.c:338: warning: no previous prototype for 'ap_session_identity_decode' mod_session.c:460: warning: no previous prototype for 'ap_session_fixups' mod_session_crypto.c:268: warning: no previous prototype for 'ap_session_crypto_encode' mod_session_crypto.c:296: warning: no previous prototype for 'ap_session_crypto_decode' mod_session_crypto.c:322: warning: no previous prototype for 'ap_session_crypto_init' mod_session_dbd.c:166: warning: no previous prototype for 'ap_session_dbd_load' mod_session_dbd.c:404: warning: no previous prototype for 'ap_session_dbd_save' mod_session_dbd.c:474: warning: no previous prototype for 'ap_session_dbd_monitor'
