Add an always-on inode64 feature

As I (and others) will be backporting the fix in
de6fddc
pretty far, I want a way for sysadmins and OS builders to
be able to reliably see when their version of ostree has this fix
(Because comparing version numbers isn't portable).

configure.ac

@@ -82,7 +82,10 @@ AM_COND_IF([BUILDOPT_TSAN],
 LT_PREREQ([2.2.4])
 LT_INIT([disable-static])
 
-OSTREE_FEATURES=""
+dnl We have an always-on feature now to signify the fix for 
+dnl https://github.com/ostreedev/ostree/pull/2874/commits/de6fddc6adee09a93901243dc7074090828a1912
+dnl "commit: fix ostree deployment on 64-bit inode fs"
+OSTREE_FEATURES="inode64"
 AC_SUBST([OSTREE_FEATURES])
 
 GLIB_TESTS

tests/basic-test.sh

@@ -19,7 +19,7 @@
 
 set -euo pipefail
 
-echo "1..$((90 + ${extra_basic_tests:-0}))"
+echo "1..$((91 + ${extra_basic_tests:-0}))"
 
 CHECKOUT_U_ARG=""
 CHECKOUT_H_ARGS="-H"
@@ -41,6 +41,11 @@ fi
 # This should be dynamic now
 assert_not_has_dir repo/uncompressed-objects-cache
 
+if ! ostree --version | grep -q -e '- inode64'; then
+    fatal missing inode64 feature
+fi
+echo "ok inode64 feature"
+
 validate_checkout_basic() {
     (cd $1;
      assert_has_file firstfile

tests/inst/src/repobin.rs

@@ -9,7 +9,10 @@ use sh_inline::{bash, bash_command};
 use with_procspawn_tempdir::with_procspawn_tempdir;
 
 pub(crate) fn itest_basic() -> Result<()> {
-    bash!(r"ostree --help >/dev/null")?;
+    // This helps verify we're running at least relatively new code
+    // as inode64 was added recently.  It's just a sanity check that
+    // we can run the binary too.
+    bash!(r"ostree --version |grep -q -e '- inode64'")?;
     Ok(())
 }