* cppfiles.c (open_file): Don't mark zero-length files

	never-reread here.  Don't output diagnostics here either.
	(stack_include_file): Mark them never-reread here.
	(_cpp_read_file): Update.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@46084 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 99100d4..6c22095 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2001-10-08  Neil Booth  <neil@daikokuya.demon.co.uk>
+
+       * cppfiles.c (open_file): Don't mark zero-length files
+       never-reread here.  Don't output diagnostics here either.
+       (stack_include_file): Mark them never-reread here.
+       (_cpp_read_file): Update.
+
 2001-10-08  Richard Henderson  <rth@redhat.com>
 
        * config/i386/sol2.h (UNALIGNED_DOUBLE_INT_ASM_OP): New.

diff --git a/gcc/cppfiles.c b/gcc/cppfiles.c
index 5b8f907..ebefd95 100644 (file)
--- a/gcc/cppfiles.c
+++ b/gcc/cppfiles.c
@@ -248,30 +248,15 @@ open_file (pfile, filename)
 
   if (file->fd != -1 && fstat (file->fd, &file->st) == 0)
     {
+      if (!S_ISDIR (file->st.st_mode))
+       return file;
       /* If it's a directory, we return null and continue the search
         as the file we're looking for may appear elsewhere in the
         search path.  */
-      if (S_ISDIR (file->st.st_mode))
-       errno = ENOENT;
-      else
-       {
-         /* Mark a regular, zero-length file never-reread now.  */
-         if (S_ISREG (file->st.st_mode) && file->st.st_size == 0)
-           {
-             _cpp_never_reread (file);
-             close (file->fd);
-             file->fd = -1;
-           }
-
-         return file;
-       }
+      errno = ENOENT;
     }
 
-  /* Don't issue an error message if the file doesn't exist.  */
   file->err_no = errno;
-  if (errno != ENOENT && errno != ENOTDIR)
-    cpp_error_from_errno (pfile, file->name);
-
   return 0;
 }
 
@@ -302,9 +287,14 @@ stack_include_file (pfile, inc)
   /* Not in cache?  */
   if (! inc->buffer)
     {
-      /* If an error occurs, do not try to read this file again.  */
-      if (read_include_file (pfile, inc))
+      /* Mark a regular, zero-length file never-reread.  Zero-length
+        files are stacked the first time, so preprocessing a main
+        file of zero length does not raise an error.  */
+      if (S_ISREG (inc->st.st_mode) && inc->st.st_size == 0)
+       _cpp_never_reread (inc);
+      else if (read_include_file (pfile, inc))
        {
+         /* If an error occurs, do not try to read this file again.  */
          _cpp_never_reread (inc);
          return false;
        }
@@ -710,14 +700,14 @@ _cpp_read_file (pfile, fname)
      const char *fname;
 {
   struct include_file *f = open_file (pfile, fname);
-  bool stacked = false;
 
   if (f == NULL)
-    cpp_error_from_errno (pfile, fname);
-  else
-    stacked = stack_include_file (pfile, f);
+    {
+      cpp_error_from_errno (pfile, fname);
+      return false;
+    }
 
-  return stacked;
+  return stack_include_file (pfile, f);
 }
 
 /* Do appropriate cleanup when a file buffer is popped off the input