configure correctly for use of strdup()

configure.ac

@@ -44,6 +44,20 @@ AC_CHECK_HEADERS([sys/types.h])
 AC_CHECK_HEADERS([stdint.h])
 AC_CHECK_HEADERS([unistd.h])
 
+# Checks for C sources
+AC_CHECK_FUNCS([memset])
+AC_CHECK_FUNCS([strdup])
+AC_C_INLINE
+AC_C_RESTRICT
+AC_FUNC_MALLOC
+AC_TYPE_SIZE_T
+AC_TYPE_UINT32_T
+AC_TYPE_UINT64_T
+AC_TYPE_UINT8_T
+
+# Checks for libtool
+AC_PROG_CXX
+
 # backwards compat with older pkg-config
 # - pull in AC_DEFUN from pkg.m4
 m4_ifndef([PKG_CHECK_VAR], [

src/vmod_blobdigest.c

@@ -25,13 +25,11 @@
  *
  */
 
-#define _POSIX_C_SOURCE 200809L
+#include "config.h"
 
 #include <stdlib.h>
 #include <string.h>
 
-#include "config.h"
-
 #include "vcl.h"
 #include "vrt.h"
 #include "vas.h"