--- lbbs/configure.ac	2025/05/06 10:15:16	1.7
+++ lbbs/configure.ac	2025/05/09 11:21:11	1.8
@@ -23,7 +23,9 @@ AC_CHECK_LIB([mysqlclient], [mysql_conne
 AC_CHECK_LIB([z], [unzip])
 
 AC_HEADER_SYS_WAIT
-AC_CHECK_HEADERS([arpa/inet.h dflcn.h fcntl.h memory.h netdb.h netinet/in.h stdlib.h string.h strings.h sys/ioctl.h sys/param.h sys/socket.h sys/time.h unistd.h mysql.h])
+AC_CHECK_HEADERS([arpa/inet.h dflcn.h fcntl.h memory.h netdb.h netinet/in.h signal.h stdlib.h \
+					string.h strings.h sys/ioctl.h sys/param.h sys/socket.h sys/time.h \
+					sys/syscall.h sys/wait.h unistd.h mysql.h])
 
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST