Move implementation of <file_change_detection.h> into a C file

file_change_detection_for_stat partially initialize
struct file_change_detection in some cases, when the size member
alone determines the outcome of all comparisons.  This results
in maybe-uninitialized compiler warnings in case of sufficiently
aggressive inlining.

Once the implementation is moved into a separate C file, this kind
of inlining is no longer possible, so the compiler warnings are gone.

1 files changed, 4 insertions, 0 deletions

diff --git a/io/Versions b/io/Versions
index f7e5dbe49e..ee468055ff 100644
--- a/io/Versions
+++ b/io/Versions
@@ -137,5 +137,9 @@ libc {
     __fcntl_nocancel;
     __open64_nocancel;
     __write_nocancel;
+    __file_is_unchanged;
+    __file_change_detection_for_stat;
+    __file_change_detection_for_path;
+    __file_change_detection_for_fp;
   }
 }