Test symbol visibility

CMakeLists.txt

@@ -52,6 +52,11 @@ target_compile_options(${PROJECT_NAME} PRIVATE -fPIC -fno-exceptions
 target_link_options(${PROJECT_NAME} PRIVATE $<$<NOT:$<CONFIG:Debug>>:
                     -nodefaultlibs -lc>)
 
+if(NOT APPLE)
+  target_link_options(${PROJECT_NAME} PRIVATE
+                      LINKER:--version-script=${CMAKE_SOURCE_DIR}/linker.map)
+endif()
+
 add_library(${PROJECT_NAME}_static STATIC ConflictSet.cpp)
 target_compile_options(conflict_set_static PRIVATE -fno-exceptions
                                                    -fvisibility=hidden)
@@ -125,6 +130,14 @@ set_property(TARGET conflict_set_c_api_test PROPERTY CXX_STANDARD 98)
 set_property(TARGET conflict_set_c_api_test PROPERTY CXX_STANDARD_REQUIRED ON)
 add_test(NAME conflict_set_cxx_api_test COMMAND conflict_set_cxx_api_test)
 
+add_test(NAME conflict_set_shared_symbols
+         COMMAND ${CMAKE_SOURCE_DIR}/test_symbols.sh
+                 $<TARGET_FILE:${PROJECT_NAME}> ${CMAKE_SOURCE_DIR}/symbols.txt)
+add_test(
+  NAME conflict_set_static_symbols
+  COMMAND ${CMAKE_SOURCE_DIR}/test_symbols.sh
+          $<TARGET_FILE:${PROJECT_NAME}_static> ${CMAKE_SOURCE_DIR}/symbols.txt)
+
 # packaging
 
 set(CPACK_PACKAGE_CONTACT andrew@weaselab.dev)

linker.map

@@ -0,0 +1,6 @@
+{
+  global:
+    *ConflictSet*;
+  local:
+    *;
+};

test_symbols.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+set -euo pipefail
+
+diff -u <(nm $1 | grep " T " | cut -f3 -d " " | sort) $2