configure.ac: use preprocessor to detect dpdk version

The test doesn't run any code, so no need to compile it.

diff --git a/configure.ac b/configure.ac
index 90acfb8..11fb9ab 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -2803,7 +2803,7 @@ if test "x$with_libdpdk" != "xno"; then
   AC_CHECK_HEADERS([rte_config.h],
     [
       with_libdpdk="yes"
   AC_CHECK_HEADERS([rte_config.h],
     [
       with_libdpdk="yes"

-      AC_COMPILE_IFELSE(
+      AC_PREPROC_IFELSE(

         [
           AC_LANG_PROGRAM(
             [[
         [
           AC_LANG_PROGRAM(
             [[