1 files changed, 40 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
index 35436e7f..cbe609d4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -135,6 +135,30 @@ AC_CHECK_HEADER([[search.h]],
 
 AM_CONDITIONAL([MHD_HAVE_TSEARCH], [[test "x$ac_cv_header_search_h" = xyes && test "x$HAVE_TSEARCH" = "x1" && test "x$REPLACE_TSEARCH" != "x1"]])
 
+# Optional headers used for tests
+AC_CHECK_HEADERS([sys/sysctl.h netinet/ip_icmp.h netinet/icmp_var.h], [], [],
+  [[
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif /* HAVE_SYS_TYPES_H */
+#ifdef HAVE_SYS_SYSCTL_H
+#include <sys/sysctl.h>
+#endif /* HAVE_SYS_SYSCTL_H */
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif /* HAVE_SYS_SOCKET_H */
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif /* HAVE_NETINET_IN_H */
+#ifdef HAVE_NETINET_IP_H
+#include <netinet/ip.h>
+#endif /* HAVE_NETINET_IP_H */
+#ifdef HAVE_NETINET_IP_ICMP_H
+#include <netinet/ip_icmp.h>
+#endif /* HAVE_NETINET_IP_ICMP_H */
+  ]]
+)
+
 # Checks for gettext.
 m4_ifdef([AM_GNU_GETTEXT], [
   AS_VAR_SET_IF([enable_nls], [], [[enable_nls=no]])
@@ -1881,6 +1905,22 @@ AC_MSG_RESULT($have_inet6)
 
 MHD_CHECK_FUNC([[sysconf]], [[#include <unistd.h>]], [[long a = sysconf(0); if (a) return 1;]])
 
+MHD_CHECK_FUNC([[sysctl]], [[
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_SYSCTL_H
+#include <sys/sysctl.h>
+#endif
+#ifdef HAVE_STDDEF_H
+#include <stddef.h>
+#endif
+  ]], [[int mib[2] = {CTL_KERN, KERN_MAXPROC}; if (sysctl(mib, 2, NULL, NULL, NULL, 0)) return 1;]]
+)
+
+MHD_CHECK_FUNC([[usleep]], [[#include <unistd.h>]], [[usleep(100000);]])
+MHD_CHECK_FUNC([[nanosleep]], [[#include <time.h>]], [[struct timespec ts2, ts1 = {0, 0}; nanosleep(&ts1, &ts2);]])
+
 HIDDEN_VISIBILITY_CFLAGS=""
 AS_CASE(["$host"],
   [*-*-mingw*],[