configure: add some more checks suggested by autoscan

Signed-off-by: Uwe Kleine-König <[email protected]>

Author: ukleinek

configure.ac

@@ -15,13 +15,15 @@ AC_SYS_LARGEFILE
 AC_CHECK_LIB([readline], [readline])
 
 # Checks for header files.
-AC_CHECK_HEADERS([arpa/inet.h fcntl.h limits.h netdb.h netinet/in.h stdint.h stdlib.h string.h sys/ioctl.h sys/socket.h sys/time.h termios.h unistd.h])
+AC_CHECK_HEADERS([arpa/inet.h fcntl.h limits.h netdb.h netinet/in.h stdint.h stdlib.h string.h sys/file.h sys/ioctl.h sys/socket.h sys/time.h termios.h unistd.h])
+AC_CHECK_HEADER_STDBOOL
 
 # Checks for typedefs, structures, and compiler characteristics.
 AC_TYPE_SIZE_T
 AC_TYPE_UINT16_T
 AC_TYPE_UINT32_T
 AC_TYPE_UINT8_T
+AC_TYPE_SSIZE_T
 
 # Checks for library functions.
 AC_FUNC_MALLOC