Re: [Xen-devel] Attempt to build xen-unstable on F11 ( gcc version 4.4.0 )

[Jun Koi <junkoi2004@xxxxxxxxx>]

On Wed, Jun 24, 2009 at 6:57 PM, Boris Derzhavets<bderzhavets@xxxxxxxxx> wrote:
> The failure bellow doesn't happen with gcc 4.3.3 ( Ubuntu 9.04 Server)
> . . . . . . . . . . . .
> gcc  -O2 -fomit-frame-pointer -m64 -fno-strict-aliasing -std=gnu99 -Wall
> -Wstrict-prototypes -Wno-unused-value -Wdeclaration-after-statement
> -D__XEN_TOOLS__ -MMD -MF .vhd-util-check.o.d  -D_LARGEFILE_SOURCE
> -D_LARGEFILE64_SOURCE  -Werror -Wno-unused -I../../include -D_GNU_SOURCE
> -fPIC -g -Wp,-MD,.vhd-util-check.o.d -c -o vhd-util-check.o vhd-util-check.c
> cc1: warnings being treated as errors
> vhd-util-check.c: In function ‘vhd_util_check_vhd’:
> vhd-util-check.c:809: error: ‘footer.data_offset’ may be used uninitialized
> in this function
> vhd-util-check.c:809: error: ‘footer.type’ may be used uninitialized in this
> function

I had a quick fix for this problem, with following patch. Perhaps that
is not the best way, but at least you can compile blktap2 with it.

For other compilation problems with blktap2, you can pick up the
patches I just post to the list.

Thanks,
J


diff -r 442fb5f1e0a2 tools/blktap2/vhd/lib/vhd-util-check.c
--- a/tools/blktap2/vhd/lib/vhd-util-check.c    Tue Jun 23 17:32:07 2009 +0100
+++ b/tools/blktap2/vhd/lib/vhd-util-check.c    Wed Jun 24 19:04:17 2009 +0900
@@ -808,6 +808,9 @@
        struct stat stats;
        vhd_footer_t footer;

+       footer.data_offset = 0;
+       footer.type = 0;
+
        fd = -1;
        memset(&vhd, 0, sizeof(vhd));

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