From 59859b8896e527bbd4a727beb798776d2716a8b3 Mon Sep 17 00:00:00 2001
From: Harmen Stoppels <me@harmenstoppels.nl>
Date: Thu, 10 Aug 2023 18:53:17 +0200
Subject: [PATCH] version script

---
 libclingo/CMakeLists.txt | 12 ++++++++++++
 libclingo/clingo.map     |  4 ++++
 2 files changed, 16 insertions(+)
 create mode 100644 libclingo/clingo.map

diff --git a/libclingo/CMakeLists.txt b/libclingo/CMakeLists.txt
index 1d70ba56..0fd3bf49 100644
--- a/libclingo/CMakeLists.txt
+++ b/libclingo/CMakeLists.txt
@@ -58,6 +58,18 @@ target_include_directories(libclingo
     "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>")
 target_compile_definitions(libclingo ${clingo_private_scope_} CLINGO_BUILD_LIBRARY)
 
+# Hide private symbols on Linux.
+include(CheckCSourceCompiles)
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/version.map" "{ global: f; local: *;};")
+set(CMAKE_REQUIRED_FLAGS_SAVE ${CMAKE_REQUIRED_FLAGS})
+set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS} "-Wl,--version-script='${CMAKE_CURRENT_BINARY_DIR}/version.map'")
+check_c_source_compiles("void f(void) {} int main(void) {return 0;}" HAVE_LD_VERSION_SCRIPT)
+set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS_SAVE})
+file(REMOVE "${CMAKE_CURRENT_BINARY_DIR}/version.map")
+if(HAVE_LD_VERSION_SCRIPT)
+set_target_properties(libclingo PROPERTIES LINK_FLAGS "-Wl,--version-script='${CMAKE_CURRENT_SOURCE_DIR}/clingo.map'")
+endif()
+
 if (NOT CLINGO_BUILD_SHARED)
     target_compile_definitions(libclingo PUBLIC CLINGO_NO_VISIBILITY)
 endif()
diff --git a/libclingo/clingo.map b/libclingo/clingo.map
new file mode 100644
index 00000000..a665456c
--- /dev/null
+++ b/libclingo/clingo.map
@@ -0,0 +1,4 @@
+{
+    global: clingo_*; gringo_*; g_clingo_*;
+    local: *;
+};
\ No newline at end of file
-- 
2.39.2