Fix build with libxml2-2.12

https://gitlab.com/libosinfo/osinfo-db-tools/-/merge_requests/80

80.patch

@@ -0,0 +1,85 @@
+From 34378a4ac257f2f5fcf364786d1634a8c36b304f Mon Sep 17 00:00:00 2001
+From: Michal Privoznik <mprivozn@redhat.com>
+Date: Mon, 27 Nov 2023 15:04:43 +0100
+Subject: [PATCH 1/2] 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
+   (validate_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.
+
+Also, drop obviously incorrect @error annotation in
+validate_structured_error_nop; the variable is used.
+
+Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
+---
+ tools/osinfo-db-validate.c | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/tools/osinfo-db-validate.c b/tools/osinfo-db-validate.c
+index a721b4d..b1434a6 100644
+--- a/tools/osinfo-db-validate.c
++++ b/tools/osinfo-db-validate.c
+@@ -35,7 +35,7 @@ static void validate_generic_error_nop(void *userData G_GNUC_UNUSED,
+ }
+ 
+ static void validate_structured_error_nop(void *userData G_GNUC_UNUSED,
+-                                          xmlErrorPtr error G_GNUC_UNUSED)
++                                          const xmlError *error)
+ {
+     if (error->file)
+         g_printerr("%s:%d %s", error->file, error->line, error->message);
+@@ -173,7 +173,8 @@ static gboolean validate_files(GFile *schema, gsize nfiles, GFile **files, GErro
+     g_autofree gchar *schemapath = NULL;
+ 
+     xmlSetGenericErrorFunc(NULL, validate_generic_error_nop);
+-    xmlSetStructuredErrorFunc(NULL, validate_structured_error_nop);
++    /* Drop this typecast when >=libxml2-2.12.0 is required */
++    xmlSetStructuredErrorFunc(NULL, (xmlStructuredErrorFunc) validate_structured_error_nop);
+ 
+     schemapath = g_file_get_path(schema);
+     rngParser = xmlRelaxNGNewParserCtxt(schemapath);
+-- 
+GitLab
+
+
+From 019487cbc79925e49988789bf533c78dab7e1842 Mon Sep 17 00:00:00 2001
+From: Michal Privoznik <mprivozn@redhat.com>
+Date: Mon, 27 Nov 2023 15:06:04 +0100
+Subject: [PATCH 2/2] osinfo-db-validate: Add more libxml/ includes
+
+In its 2.12.0 release, libxml reworked their header files (some
+might even call it cleaning up, I call it API incompatible
+change) and now  we don't get all declarations we need by just
+including one file. Add missing includes.
+
+Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
+---
+ tools/osinfo-db-validate.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/tools/osinfo-db-validate.c b/tools/osinfo-db-validate.c
+index b1434a6..f3275db 100644
+--- a/tools/osinfo-db-validate.c
++++ b/tools/osinfo-db-validate.c
+@@ -20,7 +20,9 @@
+  *   Daniel P. Berrange <berrange@redhat.com>
+  */
+ 
++#include <libxml/parser.h>
+ #include <libxml/relaxng.h>
++#include <libxml/tree.h>
+ #include <locale.h>
+ #include <glib/gi18n.h>
+ 
+-- 
+GitLab
+

osinfo-db-tools.spec

@@ -12,6 +12,10 @@ Release: %autorelease
 License: GPL-2.0-or-later
 Source: https://releases.pagure.org/libosinfo/%{name}-%{version}.tar.xz
 URL: https://libosinfo.org
+
+# Fix build for libxml2-2.12
+Patch:  https://gitlab.com/libosinfo/osinfo-db-tools/-/merge_requests/80.patch
+
 BuildRequires: meson
 BuildRequires: gcc
 BuildRequires: gettext-devel