trying to run compiled code fails when cross-compiling.
probe the value using the preprocessor instead.

--- a/configure.ac
+++ b/configure.ac
@@ -621,21 +621,8 @@
 	        sepol_new_errcodes="yes",
                 sepol_new_errcodes="no")
 
-AC_RUN_IFELSE(
-   [AC_LANG_SOURCE([
-#include <sepol/policydb/policydb.h>
-#include <stdio.h>
-#include <stdlib.h>
-int main(void) {
-    FILE *f = fopen("conftest.data", "w");
-    if (f != NULL && fprintf(f, "%d", POLICYDB_VERSION_MAX) > 0) {
-       fclose(f);
-       exit(EXIT_SUCCESS);
-    }
-    exit(EXIT_FAILURE);
-}])],
-    sepol_policy_version_max=`cat conftest.data`,
-    AC_MSG_FAILURE([could not determine maximum libsepol policy version]))
+printf "#include <sepol/policydb/policydb.h>\nPOLICYDB_VERSION_MAX\n" > conftest.c
+sepol_policy_version_max=`${CPP} -E -P ${CPPFLAGS} conftest.c | tail -1`
 AC_DEFINE_UNQUOTED(SEPOL_POLICY_VERSION_MAX, ${sepol_policy_version_max}, [maximum policy version supported by libsepol])
 CFLAGS="${sepol_save_CFLAGS}"
 CPPFLAGS="${sepol_save_CPPFLAGS}"