From 9cce68023ac45621af360af41b9c3b170b1b630f Mon Sep 17 00:00:00 2001
From: heinrich5991 <heinrich5991@gmail.com>
Date: Wed, 9 Dec 2020 10:17:11 +0100
Subject: [PATCH] Export all symbols from the main executable for the antibot

Add `-rdynamic` if supported by the linker.

Not all symbols being exported broke our builds recently, the antibot
library used `mem_comp` from the main binary but it wasn't exported,
leading to the following runtime error:

```
./DDRace64-Server_sql: symbol lookup error: /home/teeworlds/servers/libantibot.so: undefined symbol: mem_comp
```
---
 CMakeLists.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9780283e3..a1dd0e20f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2552,6 +2552,8 @@ endmacro()
 source_group_tree(src)
 
 if(ANTIBOT)
+  # Allow the antibot library to use functions from the server binary.
+  add_c_compiler_flag_if_supported(OUR_FLAGS_LINK -rdynamic)
   set_own_rpath(${TARGET_SERVER})
 endif()