Uses gettimeofday but won't include sys/time.h without HAVE_SYS_TIME_H
leading to failure with -Werror=implicit-function-declaration (clang16).

sys/timeb.h is for deprecated ftime() and should not be used.

https://bugs.gentoo.org/870973
--- a/configure.in
+++ b/configure.in
@@ -51,5 +51,5 @@
 dnl Checks for header files.
 AC_HEADER_STDC
-AC_CHECK_HEADERS([stropts.h sys/timeb.h sys/select.h])
+AC_CHECK_HEADERS([stropts.h sys/time.h sys/select.h])
 
 dnl ================================================================