some more info to minimal example

CMakeLists.txt

@@ -12,6 +12,9 @@ if(UNIX AND NOT APPLE)
     message(STATUS "Defining _GNU_SOURCE for Unix build")
 endif()
 
+# Common compile options
+add_compile_options("-fvisibility=hidden")
+
 # Handle 3rd party dependencies
 # #############################
 

test/manual/CMakeLists.txt

@@ -8,6 +8,7 @@ add_executable(minimal
 add_library(mini SHARED
   minimal_lib.cpp
   minimal_lib.h
+
 )
 
 target_link_libraries(minimal mini)

test/manual/minimal.cpp

@@ -9,12 +9,20 @@ int main(int argc, char *argv[]) {
   int modified = -1;
   while (modified != 0) {
 
+    printf("==========================\n");
+    printf("main address: %p\n", main);
+    printf("minimal_lib::getNewValue address: %p\n", minimal_lib::getNewValue);
+    printf("minimal_lib::otherValue address: %p\n", &minimal_lib::otherValue);
+    printf("==========================\n");
+    printf("\n");
+
     modified = minimal_lib::getNewValue(5);
     printf("getModified(5): %d\n", modified);
     std::this_thread::sleep_for(std::chrono::seconds(1));
 
-    printf("otherValue: %d\n", minimal_lib::otherValue);
+    printf("otherValue: %d\n", minimal_lib::otherValue++);
     std::this_thread::sleep_for(std::chrono::seconds(1));
+    printf("\n");
   }
 
   return 0;

test/manual/minimal_lib.h

@@ -3,9 +3,12 @@
 
 namespace minimal_lib {
 
-static int otherValue = 5;
+static int otherValue = 0;
+
+#pragma GCC visibility push(default)
 
 int getNewValue(int x);
 
+#pragma GCC visibility pop
 }
 #endif // MINIMAL_LIB_H_