1 files changed, 31 insertions, 0 deletions
diff --git a/m4/pdns_check_dnstap.m4 b/m4/pdns_check_dnstap.m4
new file mode 100644
index 0000000..1be83c6
--- /dev/null
+++ b/m4/pdns_check_dnstap.m4
@@ -0,0 +1,31 @@
+AC_DEFUN([PDNS_CHECK_DNSTAP], [
+  AC_MSG_CHECKING([whether we will have dnstap])
+  AC_ARG_ENABLE([dnstap],
+    AS_HELP_STRING([--enable-dnstap],[enable dnstap support @<:@default=$1@:>@]),
+    [enable_dnstap=$enableval],
+    [enable_dnstap=$1],
+  )
+  AC_MSG_RESULT([$enable_dnstap])
+
+  AS_IF([test "x$enable_dnstap" != "xno"], [
+    AS_IF([test "x$enable_dnstap" = "xyes" -o "x$enable_dnstap" = "xauto"], [
+      PKG_CHECK_MODULES([FSTRM], [libfstrm], [
+        AC_DEFINE([HAVE_FSTRM], [1], [Define to 1 if you have libfstrm])
+        save_CFLAGS=$CFLAGS
+        save_LIBS=$LIBS
+        CFLAGS="$FSTRM_CFLAGS $CFLAGS"
+        LIBS="$FSTRM_LIBS $LIBS"
+        AC_CHECK_FUNCS([fstrm_tcp_writer_init])
+        CFLAGS=$save_CFLAGS
+        LIBS=$save_LIBS
+      ], [ : ])
+    ])
+  ])
+
+  AM_CONDITIONAL([FSTRM], [test "x$FSTRM_LIBS" != "x"])
+  AS_IF([test "x$enable_dnstap" = "xyes"], [
+    AS_IF([test x"$FSTRM_LIBS" = "x"], [
+      AC_MSG_ERROR([dnstap requested but libfstrm was not found])
+    ])
+  ])
+])