Compiler problems with zero-length array in the middle of a struct

Some compiler reject a zero-length array in the middle of a structure, and report it as an error.
So could we please redo the change, that has recently been done to include/linux/raid/md_p.h (see patch below).

/Carsten

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Index: include/linux/raid/md_p.h
===================================================================
RCS file: /home/cvs/linux/include/linux/raid/md_p.h,v retrieving revision 1.3

diff -u -r1.3 md_p.h
@@ -151,10 +151,12 @@
 	 */
 	mdp_disk_t disks[MD_SB_DISKS];
 
+#if MD_SB_RESERVED_WORDS
 	/*
 	 * Reserved
 	 */
 	__u32 reserved[MD_SB_RESERVED_WORDS];
+#endif
 
 	/*
 	 * Active descriptor

Hmm... What compiler version is that? The gcc documentation explicitly permits empty arrays.

Ralf

It should be a problem in gcc-3.0, also the SDE compiler has a problem with that, but it's going to be fixed.

/Carsten

--

_    _ ____  ___   Carsten Langgaard   Mailto:[email protected]
|\  /|||___)(___   MIPS Denmark        Direct: +45 4486 5527
| \/ |||    ____)  Lautrupvang 4B      Switch: +45 4486 5555
  TECHNOLOGIES     2750 Ballerup       Fax...: +45 4486 5556
                   Denmark             http://www.mips.com

There was some discussion about this and what to do with zero sized objects. In the C++ universe it seems to be horribly complicated with rules about two objects not having the same address.