From a8c3ceb3c94104a1a874c8f1ba8a0af7b6ba9258 Mon Sep 17 00:00:00 2001
From: Jonathan G Rennison <j.g.rennison@gmail.com>
Date: Sat, 27 Jun 2020 14:33:32 +0100
Subject: [PATCH] CMake: Add libdl and demangle support

---
 CMakeLists.txt           |  5 +++++
 cmake/FindDL.cmake       | 20 ++++++++++++++++++++
 cmake/FindDemangle.cmake | 18 ++++++++++++++++++
 3 files changed, 43 insertions(+)
 create mode 100644 cmake/FindDL.cmake
 create mode 100644 cmake/FindDemangle.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 825ba3dcd4..ac8bb6523f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -55,6 +55,11 @@ if (MSVC)
     find_package(Editbin REQUIRED)
 endif (MSVC)
 
+if (UNIX)
+    find_package(DL)
+    find_package(Demangle)
+endif (UNIX)
+
 find_package(SSE)
 find_package(Xaudio2)
 
diff --git a/cmake/FindDL.cmake b/cmake/FindDL.cmake
new file mode 100644
index 0000000000..cc5167ac73
--- /dev/null
+++ b/cmake/FindDL.cmake
@@ -0,0 +1,20 @@
+include(CheckCXXSourceCompiles)
+set(CMAKE_REQUIRED_LIBRARIES "dl")
+
+check_cxx_source_compiles("
+    #include <dlfcn.h>
+    int main() {
+        Dl_info info;
+        return dladdr(0, &info);
+    }"
+    DL_FOUND
+)
+
+if (DL_FOUND)
+    add_compile_options(
+        -DWITH_DL
+    )
+    link_libraries(dl)
+endif (DL_FOUND)
+
+set(CMAKE_REQUIRED_LIBRARIES "")
diff --git a/cmake/FindDemangle.cmake b/cmake/FindDemangle.cmake
new file mode 100644
index 0000000000..71beebf115
--- /dev/null
+++ b/cmake/FindDemangle.cmake
@@ -0,0 +1,18 @@
+include(CheckCXXSourceCompiles)
+set(CMAKE_REQUIRED_FLAGS "")
+
+check_cxx_source_compiles("
+    #include <cxxabi.h>
+    int main() {
+        int status = -1;
+        char *demangled = abi::__cxa_demangle(\"test\", 0, 0, &status);
+        return 0;
+    }"
+    DEMANGLE_FOUND
+)
+
+if (DEMANGLE_FOUND)
+    add_compile_options(
+        -DWITH_DEMANGLE
+    )
+endif (DEMANGLE_FOUND)