osinfo-db-tools: fix build for libxml2 2.12 and gcc 14

srcpkgs/osinfo-db-tools/patches/fix-libxml2-2.12.patch

@@ -0,0 +1,54 @@
+Not currently necessary, but will be with gcc 14
+
+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] 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
+