From 7b5acd79a749e50bc825a49b283d4f9e82a5e1b5 Mon Sep 17 00:00:00 2001
From: Martin Liska <mliska@suse.cz>
Date: Tue, 1 Mar 2022 12:27:45 +0100
Subject: [PATCH] lto-plugin: add support for feature detection

lto-plugin/ChangeLog:

	* lto-plugin.c (supports_get_symbols_v3): Add symbol and
	initialize it to true;

lto-plugin/ChangeLog:

	* lto-plugin.map: Add supports_get_symbols_v3 symbol.
---
 lto-plugin/lto-plugin.c   | 5 +++++
 lto-plugin/lto-plugin.map | 5 ++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/lto-plugin/lto-plugin.c b/lto-plugin/lto-plugin.c
index 47378435612..6aac5867066 100644
--- a/lto-plugin/lto-plugin.c
+++ b/lto-plugin/lto-plugin.c
@@ -1554,3 +1554,8 @@ onload (struct ld_plugin_tv *tv)
 
   return LDPS_OK;
 }
+
+/* Presence of the following symbols is used for dynamic detection of plug-in features
+   from linker side.  */
+
+bool supports_get_symbols_v3 = true;
diff --git a/lto-plugin/lto-plugin.map b/lto-plugin/lto-plugin.map
index 3d60e71cc2d..42dc50a819c 100644
--- a/lto-plugin/lto-plugin.map
+++ b/lto-plugin/lto-plugin.map
@@ -1,3 +1,6 @@
 {
-  global: onload; local: *;
+  global: onload;
+          supports_get_symbols_v3;
+
+  local: *;
 };
-- 
2.36.0