Fix new test under linux

source/tests/Makefile

@@ -122,7 +122,7 @@ ansi-pedantic-test_cxxlang: ansi-pedantic-test.cpp ../backend/Carla*.h ../includ
 # --------------------------------------------------------------
 
 ctypes-test.so: ctypes-test.c .FORCED
-	$(CC) $< $(PEDANTIC_C_FLAGS) -shared -o $@
+	$(CC) $< $(BASE_FLAGS) -fPIC -shared -o $@
 	set -e; ./ctypes-test.py
 
 # --------------------------------------------------------------

source/tests/ctypes-test.c

@@ -2,17 +2,17 @@
 #include <stdio.h>
 
 typedef void (*PythonSideFn)(int checker);
+__attribute__ ((visibility("default"))) void set_python_side_fn(PythonSideFn fn);
+__attribute__ ((visibility("default"))) void call_python_side_fn(void);
 
 PythonSideFn pyFn = NULL;
 
-__attribute__ ((visibility("default")))
 void set_python_side_fn(PythonSideFn fn)
 {
     printf("set_python_side_fn(%p)\n", fn);
     pyFn = fn;
 }
 
-__attribute__ ((visibility("default")))
 void call_python_side_fn(void)
 {
     assert(pyFn != NULL);