Re: ANNOUNCE: mdadm 2.6.2 - A tool for managing Soft RAID under Linux

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On Wed, 30 May 2007, Neil Brown wrote:

On Tuesday May 29, thomas.jarosch@xxxxxxxxxxxxx wrote:
Hello Neil,

On Monday, 21. May 2007, you wrote:
I am pleased to announce the availability of
   mdadm version 2.6.2

Thanks for releasing mdadm 2.6.2. It contains a fix for "--test"
I was looking for right at the moment :-)

mdadm fails to compile if you enable "-O2" using gcc 4.1.1 because of -Werror:

cc1: warnings being treated as errors
sysfs.c: In function 'sysfs_read':
sysfs.c:97: warning: value computed is not used
sysfs.c:119: warning: value computed is not used
sysfs.c:127: warning: value computed is not used
sysfs.c:133: warning: value computed is not used
sysfs.c:139: warning: value computed is not used
sysfs.c:178: warning: value computed is not used

Those are bogus warnings. Each is
	strcpy(base, "xxxxx");
and base most certainly is used., though I can see how gcc might not
notice if it is being too clever. Maybe you need to get gcc-4.1.2?
or
  make CWFLAGS=-Wall

Maybe the compiler warns about the return of strcpy() not being used.
The correct fix would then be:

       (void)strcpy(base, "xxxxx");

Holger

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