--- ccache.1.orig	2007-05-20 17:30:57.000000000 +1200

+++ ccache.1	2007-05-20 17:31:27.000000000 +1200

@@ -367,12 +367,6 @@

 .IP o 

 ccache avoids a double call to cpp on a cache miss

 .PP 

-.SH "BUGS" 

-.PP 

-When the cache is stored on an NFS filesystem, the filesystem must be

-exported with the \fBno_subtree_check\fP option to make renames between

-directories reliable\&.

-.PP 

 .SH "CREDITS" 

 .PP 

 Thanks to the following people for their contributions to ccache

--- util.c.patched	2007-05-20 18:19:11.000000000 +1200

+++ util.c	2007-05-20 18:20:55.000000000 +1200

@@ -58,9 +58,26 @@

 	}

 }

+static int safe_rename(const char* oldpath, const char* newpath)

+{

+    /* safe_rename is for creating entries in the cache.

+

+       Works like rename(), but it never overwrites an existing

+       cache entry. This avoids corruption on NFS. */

+    int status = link( oldpath, newpath );

+    if( status == 0 || errno == EEXIST )

+    {

+	return unlink( oldpath );

+    }

+    else

+    {

+	return -1;

+    }

+}

+ 

 /* move a file using rename */

 int move_file(const char *src, const char *dest) {

-	return rename(src, dest);

+	return safe_rename(src, dest);

 }

 /* copy a file - used when hard links don't work