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Re: [libvirt] [PATCH 6/7] Ensure xmlSaveToBuffer is always defined

On 03/07/13 17:41, Daniel P. Berrange wrote:
From: "Daniel P. Berrange" <berrange redhat com>

RHEL4 vintage libxml2 header files are missing xmlSaveToBuffer
despite the symbol existing in the binary

Signed-off-by: Daniel P. Berrange <berrange redhat com>
  tools/virsh-domain.c | 11 +++++++++++
  1 file changed, 11 insertions(+)

diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c
index 96dd4fa..950fc86 100644
--- a/tools/virsh-domain.c
+++ b/tools/virsh-domain.c
@@ -56,6 +56,17 @@
  #include "virtypedparam.h"
  #include "virxml.h"

+/* libxml2 in RHEL4 has this symbol in the binary but it
+ * is commented out in the header, despite apparently
+ * working fine. This hacks around that header problem
+ */
+#ifndef xmlSaveToBuffer
+xmlSaveToBuffer         (xmlBufferPtr buffer,
+			 const char *encoding,
+			 int options);

The code where you copied this from uses tabs for indentation breaking the syntax check.

  /* Gnulib doesn't guarantee SA_SIGINFO support.  */
  #ifndef SA_SIGINFO
  # define SA_SIGINFO 0

I can't say I like this kind of hacks, but the explanation is fair enough. Additionally the only function using that call is unused so it might be better #if 0 it out instead of having the ATTRIBUTE_UNUSED and that hack in the code.


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