Merge pull request #448 from potassco/revert-447-fix/hide-symbols

Revert "Hide more symbols in ELF shared libs"

CMakeLists.txt

@@ -12,7 +12,6 @@ if (NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
     set(CMAKE_BUILD_TYPE "Release")
 endif()
 
-include(CheckCXXSourceCompiles)
 include(GNUInstallDirs)
 include(CMakeDependentOption)
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
@@ -240,16 +239,6 @@ if (POLICY CMP0063 AND (CLINGO_BUILD_SHARED OR Python_Development_FOUND OR LUA_F
     set(CMAKE_C_VISIBILITY_PRESET hidden)
 endif()
 
-# Test support for -Wl,--version-script as a linker flag
-if (CLINGO_BUILD_SHARED AND UNIX AND NOT APPLE)
-    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_cxx_source_compiles("void f(){} int main(){}" CLINGO_USE_VERSION_SCRIPT)
-    set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS_SAVE})
-    file(REMOVE "${CMAKE_CURRENT_BINARY_DIR}/version.map")
-endif()
-
 enable_testing()
 
 if (CLINGO_USE_LIB)

libclingo/CMakeLists.txt

@@ -58,10 +58,6 @@ target_include_directories(libclingo
     "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>")
 target_compile_definitions(libclingo ${clingo_private_scope_} CLINGO_BUILD_LIBRARY)
 
-if (CLINGO_USE_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()