- AC_CACHE_CHECK([whether <netdb.h> is self-contained],
- [gl_cv_header_netdb_h_selfcontained],
- [
- AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <netdb.h>]],
- [[struct hostent h;]])],
- [gl_cv_header_netdb_h_selfcontained=yes],
- [gl_cv_header_netdb_h_selfcontained=no])
- ])
- if test $gl_cv_header_netdb_h_selfcontained = yes; then
- NETDB_H=''
+ AC_CHECK_HEADERS_ONCE([netdb.h])
+ gl_CHECK_NEXT_HEADERS([netdb.h])
+ if test $ac_cv_header_netdb_h = yes; then
+ HAVE_NETDB_H=1