とりあえず、apr_compat.hを2系でincludeしておくと良い。
マクロで定義したい場合は、とりあえず以下のマクロをやっとけば、1.3系のapを結構使えるはず。
#define ap_inline APR_INLINE #define ap_md5_ctx_t apr_md5_ctx_t #define ap_MD5Encode apr_md5_encode #define ap_MD5Final apr_md5_final #define ap_MD5Init apr_md5_init #define ap_MD5Update apr_md5_update #define ap_append_arrays apr_array_append #define ap_array_cat apr_array_cat #define ap_array_header_t apr_array_header_t #define ap_array_pstrcat apr_array_pstrcat #define ap_bytes_in_free_blocks apr_pool_free_blocks_num_bytes #define ap_bytes_in_pool apr_pool_num_bytes #define ap_check_file_time apr_check_file_time #define ap_filetype_e apr_filetype_e #define ap_cleanup_for_exec apr_pool_cleanup_for_exec #define ap_clear_pool apr_pool_clear #define ap_clear_table apr_table_clear #define ap_copy_array apr_array_copy #define ap_copy_array_hdr apr_array_copy_hdr #define ap_copy_table apr_table_copy #define ap_cpystrn apr_cpystrn #define ap_day_snames apr_day_snames #define ap_destroy_pool apr_pool_destroy #define ap_exploded_time_t apr_time_exp_t #define ap_fnmatch apr_fnmatch #define ap_getopt apr_getopt #define ap_inet_addr apr_inet_addr #define ap_init_alloc apr_pool_alloc_init #define ap_is_empty_table apr_is_empty_table #define ap_is_fnmatch apr_fnmatch_test #define ap_kill_cleanup apr_pool_cleanup_kill #define ap_make_array apr_array_make #define ap_make_sub_pool apr_pool_sub_make #define ap_make_table apr_table_make #define ap_month_snames apr_month_snames #define ap_note_subprocess apr_pool_note_subprocess #define ap_null_cleanup apr_pool_cleanup_null #define ap_os_canonical_filename apr_filepath_merge #define ap_os_case_canonical_filename apr_filepath_merge #define ap_os_dso_load apr_dso_load #define ap_os_dso_unload apr_dso_unload #define ap_os_dso_sym apr_dso_sym #define ap_os_dso_error apr_dso_error #define ap_os_is_filename_valid apr_filepath_merge #define ap_os_kill apr_proc_kill #define ap_os_systemcase_canonical_filename apr_filepath_merge #define ap_overlap_tables apr_table_overlap #define ap_overlay_tables apr_table_overlay #define ap_palloc apr_palloc #define ap_pcalloc apr_pcalloc #define ap_pool_join apr_pool_join #define ap_psprintf apr_psprintf #define ap_pstrcat apr_pstrcat #define ap_pstrdup apr_pstrdup #define ap_pstrndup apr_pstrndup #define ap_push_array apr_array_push #define ap_pvsprintf apr_pvsprintf #define ap_register_cleanup apr_pool_cleanup_register #define ap_register_other_child apr_proc_other_child_register #define ap_run_cleanup apr_pool_cleanup_run #define ap_signal apr_signal #define ap_snprintf apr_snprintf #define ap_table_add apr_table_add #define ap_table_addn apr_table_addn #define ap_table_do apr_table_do #define ap_table_elts apr_table_elts #define ap_table_get apr_table_get #define ap_table_merge apr_table_merge #define ap_table_mergen apr_table_mergen #define ap_table_set apr_table_set #define ap_table_setn apr_table_setn #define ap_table_unset apr_table_unset #define ap_unregister_other_child apr_proc_other_child_unregister #define ap_validate_password apr_password_validate #define ap_vformatter apr_vformatter #define ap_vsnprintf apr_vsnprintf #define ap_wait_t apr_wait_t #define ap_isalnum apr_isalnum #define ap_isalpha apr_isalpha #define ap_iscntrl apr_iscntrl #define ap_isdigit apr_isdigit #define ap_isgraph apr_isgraph #define ap_islower apr_islower #define ap_isascii apr_isascii #define ap_isprint apr_isprint #define ap_ispunct apr_ispunct #define ap_isspace apr_isspace #define ap_isupper apr_isupper #define ap_isxdigit apr_isxdigit #define ap_tolower apr_tolower #define ap_toupper apr_toupper #define AP_USEC_PER_SEC APR_USEC_PER_SEC #define AP_RFC822_DATE_LEN APR_RFC822_DATE_LEN #define AP_OVERLAP_TABLES_MERGE APR_OVERLAP_TABLES_MERGE #define AP_OVERLAP_TABLES_SET APR_OVERLAP_TABLES_SET