[bug #52267] No rule to make target, when re-including file after being generated

[Koen Van Hoof]

URL:
  <http://savannah.gnu.org/bugs/?52267>

                 Summary: No rule to make target,  when re-including file
after being generated
                 Project: make
            Submitted by: kvho
            Submitted on: Mon 23 Oct 2017 11:24:53 AM CEST
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: SCM
        Operating System: POSIX-Based
           Fixed Release: None
           Triage Status: None

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Details:

In buildroot makefile https://git.busybox.net/buildroot/tree/Makefile
following lines

-include SOMEFILE
$(shell create SOMEFILE)
include SOMEFILE

results in
make: *** No rule to make target 'SOMEFILE'.  Stop.

Easy to fix:
--- a/read.c
+++ b/read.c
@@ -412,6 +412,8 @@ eval_makefile (const char *filename, int
       deps->file->last_mtime = NONEXISTENT_MTIME;
       return deps;
     }
+  else if (deps->file->last_mtime == NONEXISTENT_MTIME)
+    deps->file->last_mtime = UNKNOWN_MTIME;
 
   /* Success; clear errno.  */
   deps->error = 0;





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