File _service:obs_scm:Make-xmlError-structs-constant... of Package libvirt-glib

File _service:obs_scm:Make-xmlError-structs-constant.patch of Package libvirt-glib

From 56acbe8a0765a02418f80fb3599b3cf7160ef446 Sat Nov 25 00:00:00 2001
From: Michal Privoznik <mprivozn@redhat.com>
Date: Sat, 25 Nov 2023
Subject: [PATCH] Make xmlError structs constant
In libxml2 commits v2.12.0~14 and v2.12.0~77 the API changed so
that:

1) xmlGetLastError() returns pointer to a constant xmlError
   struct, and

2) xmlSetStructuredErrorFunc() changed the signature of callback
   (gvir_xml_structured_error_nop()), it too is passed pointer to
   a constant xmlError struct.

But of course, older libxml2 expects different callback
signature. Therefore, we need to typecast it anyway.

---
 libvirt-gconfig/libvirt-gconfig-helpers.c | 2 +-
 libvirt-gconfig/libvirt-gconfig-object.c  | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/libvirt-gconfig/libvirt-gconfig-helpers.c b/libvirt-gconfig/libvirt-gconfig-helpers.c
index e8f9664..37075e3 100644
--- a/libvirt-gconfig/libvirt-gconfig-helpers.c
+++ b/libvirt-gconfig/libvirt-gconfig-helpers.c
@@ -41,7 +41,7 @@ static GError *gvir_config_error_new_literal(GQuark domain,
                                              gint code,
                                              const gchar *message)
 {
-    xmlErrorPtr xerr = xmlGetLastError();
+    const xmlError *xerr = xmlGetLastError();
 
     if (!xerr)
         return NULL;
diff --git a/libvirt-gconfig/libvirt-gconfig-object.c b/libvirt-gconfig/libvirt-gconfig-object.c
index eb8763e..1fcc667 100644
--- a/libvirt-gconfig/libvirt-gconfig-object.c
+++ b/libvirt-gconfig/libvirt-gconfig-object.c
@@ -59,7 +59,7 @@ static void gvir_xml_generic_error_nop(void *userData G_GNUC_UNUSED,
 }
 
 static void gvir_xml_structured_error_nop(void *userData G_GNUC_UNUSED,
-                                          xmlErrorPtr error G_GNUC_UNUSED)
+                                          const xmlError *error G_GNUC_UNUSED)
 {
 }
 
@@ -197,7 +197,8 @@ void gvir_config_object_validate(GVirConfigObject *config,
     priv = config->priv;
 
     xmlSetGenericErrorFunc(NULL, gvir_xml_generic_error_nop);
-    xmlSetStructuredErrorFunc(NULL, gvir_xml_structured_error_nop);
+    /* Drop this typecast when >=libxml2-2.12.0 is required */
+    xmlSetStructuredErrorFunc(NULL, (xmlStructuredErrorFunc) gvir_xml_structured_error_nop);
 
     if (!priv->node) {
         gvir_config_set_error_literal(err,
-- 
2.43.0