Fix undefined macro in #if conditional (#85339)

KeyValue has been disabled in libxmlsec >= 1.3.3, as it can be a security
liability in other settings than SAML:

   (xmlsec-core) Disabled KeyValue and DEREncodedKeyValue XML nodes by default. Use the '--enabled-key-data' option for the xmlsec command line utility or update the 'keyInfoCtx->enabledKeyData' parameter if you need to re-enable these nodes (also see question 3.5 in the FAQ).

configure.ac

@@ -90,7 +90,7 @@ fi
 dnl
 dnl Check for programs
 dnl
-CFLAGS="$CFLAGS -Werror=implicit-function-declaration"
+CFLAGS="$CFLAGS -Werror=undef -Werror=implicit-function-declaration"
 AC_PROG_CC
 AM_CFLAGS=""
 AC_HEADER_STDC

lasso/xml/saml-2.0/samlp2_logout_request.c

@@ -128,7 +128,7 @@ get_xmlNode(LassoNode *node, gboolean lasso_dump)
 	lasso_foreach(it, other_session_index) {
 		xmlNode *child = xmlSecAddChild(xmlnode, BAD_CAST SESSION_INDEX,
 				BAD_CAST LASSO_SAML2_PROTOCOL_HREF);
-#if (XMLSEC_MAJOR > 1) || (XMLSEC_MAJOR == 1 && XMLSEC_MINOR > 2) || (XMLSEC_MAJOR == 1 && XMLSEC_MINOR == 2 && XMLSEC_SUBMINOR > 12)
+#if (XMLSEC_VERSION_MAJOR > 1) || (XMLSEC_VERSION_MAJOR == 1 && XMLSEC_VERSION_MINOR > 2) || (XMLSEC_VERSION_MAJOR == 1 && XMLSEC_VERSION_MINOR == 2 && XMLSEC_VERSION_SUBMINOR > 12)
 		xmlSecNodeEncodeAndSetContent(child, BAD_CAST it->data);
 #else
 		xmlChar *content;

lasso/xml/xml.c

@@ -620,10 +620,6 @@ lasso_node_encrypt(LassoNode *lasso_node, xmlSecKey *encryption_public_key,
 		message(G_LOG_LEVEL_WARNING, "Failed to create encryption context");
 		goto cleanup;
 	}
-#define XSTR(x) STR(x)
-#define STR(x) #x
-
-#pragma message "The value of LASSO_XMLSEC_VERSION_NUMBER" LASSO_XMLSEC_VERSION_NUMBER
 
 #if LASSO_XMLSEC_VERSION_NUMBER >= 0x010300
 	enc_ctx->keyInfoWriteCtx.flags |= XMLSEC_KEYINFO_FLAGS_LAX_KEY_SEARCH;