Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -31,10 +31,13 @@
 dnl DC_SYNC_SHLIBOBJS again.
 DC_GET_SHOBJFLAGS
 
 dnl This stuff has to come after the shobjtest to verify that it is correct
 AC_CHECK_HEADERS(ctype.h dirent.h pwd.h stdio.h stdlib.h string.h sys/stat.h sys/time.h sys/types.h time.h unistd.h netdb.h netinet/in.h)
+AC_SEARCH_LIBS(gethostbyname, [nsl socket ws2_32], [], [
+	AC_MSG_ERROR([Unable to find a library supplying gethostbyname.])
+])
 
 AC_HEADER_TIME
 
 AC_REPLACE_FUNCS(strsep strtoll getuid)
 AC_CHECK_FUNCS(getpwuid strtof)