Fix cross-compilation issues in configure.ac
Derived from an OE patch for at-3.1.8

Upstream-Status: Pending

Signed-off-by: Scott Garman <scott.a.garman@intel.com>

Index: at-3.1.12/configure.ac
===================================================================
--- at-3.1.12.orig/configure.ac
+++ at-3.1.12/configure.ac
@@ -38,12 +38,11 @@ case "$host" in
     AC_MSG_RESULT(no)
     ;;
 esac
+if [ X"${cross_compiling}" = Xno ]; then
 AC_MSG_CHECKING(Trying to compile a trivial ANSI C program)
-AC_TRY_RUN([ main(int ac, char **av) { return 0; } ],
-    AC_MSG_RESULT(yes),
-    AC_MSG_RESULT(no)
-    AC_MSG_ERROR(Could not compile and run even a trivial ANSI C program - check CC.),
-    AC_MSG_ERROR(Could not compile and run even a trivial ANSI C program - check CC.))
+AC_RUN_IFELSE([AC_LANG_SOURCE([[ main(int ac, char **av) { return 0; } ]])],[AC_MSG_RESULT(yes)],[AC_MSG_RESULT(no)
+    AC_MSG_ERROR(Could not compile and run even a trivial ANSI C program - check CC.)],[AC_MSG_ERROR(Could not compile and run even a trivial ANSI C program - check CC.)])
+fi
 
 AC_MSG_CHECKING(__attribute__((noreturn)))
 AC_TRY_COMPILE([], [void __attribute__((noreturn)) panic(void);],