Add loader API map/def files

Export only the loader API symbols that are needed. This is done
by creating a map file for the loader API for Linux and a def file for
Windows.

scripts/generate_code.py

@@ -328,12 +328,12 @@ def _mako_info_hpp(path, namespace, tags, version, specs, meta):
         specs=specs,
         meta=meta)
 
+
 """
 Entry-point:
     generates linker version scripts
 """
-def _mako_linker_scripts(path, ext, namespace, tags, version, specs, meta):
-    name = "adapter"
+def _mako_linker_scripts(path, name, ext, namespace, tags, version, specs, meta):
     filename = f"{name}.{ext}.in"
     fin = os.path.join(templates_dir, f"{filename}.mako")
     fout = os.path.join(path, filename)
@@ -347,6 +347,7 @@ def _mako_linker_scripts(path, ext, namespace, tags, version, specs, meta):
         specs=specs,
         meta=meta)
 
+
 """
 Entry-point:
     generates lib code
@@ -370,6 +371,12 @@ def generate_loader(path, section, namespace, tags, version, specs, meta):
     loc = 0
     loc += _mako_loader_cpp(dstpath, namespace, tags, version, specs, meta)
     loc += _mako_print_cpp(dstpath, namespace, tags, version, specs, meta)
+    loc += _mako_linker_scripts(
+        dstpath, "loader", "map", namespace, tags, version, specs, meta
+    )
+    loc += _mako_linker_scripts(
+        dstpath, "loader", "def", namespace, tags, version, specs, meta
+    )
     print("Generated %s lines of code.\n"%loc)
 
 """
@@ -382,8 +389,12 @@ def generate_adapters(path, section, namespace, tags, version, specs, meta):
 
     loc = 0
     loc += _mako_null_adapter_cpp(dstpath, namespace, tags, version, specs, meta)
-    loc += _mako_linker_scripts(dstpath, "map", namespace, tags, version, specs, meta)
-    loc += _mako_linker_scripts(dstpath, "def", namespace, tags, version, specs, meta)
+    loc += _mako_linker_scripts(
+        dstpath, "adapter", "map", namespace, tags, version, specs, meta
+    )
+    loc += _mako_linker_scripts(
+        dstpath, "adapter", "def", namespace, tags, version, specs, meta
+    )
     print("Generated %s lines of code.\n"%loc)
 
 """

scripts/templates/helper.py

@@ -12,8 +12,10 @@
 
 # allow imports from top-level scripts directory
 sys.path.append("..")
+from .print_helper import get_api_types_funcs
 from version import Version
 
+
 """
     Extracts traits from a spec object
 """
@@ -656,6 +658,32 @@ def get_adapter_handles(specs):
 
     return objs
 
+"""
+Public:
+    returns a list of all loader API functions' names
+"""
+def get_loader_functions(specs, meta, n, tags):
+    func_names = []
+
+    # Main API functions
+    for s in specs:
+        for obj in s["objects"]:
+            if obj_traits.is_function(obj):
+                func_names.append(make_func_name(n, tags, obj))
+
+    # Process address tables functions
+    for tbl in get_pfntables(specs, meta, n, tags):
+        func_names.append(tbl['export']['name'])
+
+    # Print functions
+    api_types_funcs = get_api_types_funcs(specs, meta, n, tags)
+    for func in api_types_funcs:
+        func_names.append(func.c_name)
+    func_names.append(f"{tags['$x']}PrintFunctionParams")
+
+    return sorted(func_names)
+
+
 """
 Private:
     removes 'const' from c++ type

scripts/templates/loader.def.in.mako

@@ -0,0 +1,11 @@
+<%!
+import re
+from templates import helper as th
+%><%
+	n=namespace
+%>\
+LIBRARY @TARGET_LIBNAME@
+EXPORTS
+%for line in th.get_loader_functions(specs, meta, n, tags):
+	${line}
+%endfor

scripts/templates/loader.map.in.mako

@@ -0,0 +1,14 @@
+<%!
+import re
+from templates import helper as th
+%><%
+    n=namespace
+%>\
+@TARGET_LIBNAME@ {
+	global:
+%for line in th.get_loader_functions(specs, meta, n, tags):
+		${line};
+%endfor
+	local:
+		*;
+};

source/loader/CMakeLists.txt

@@ -15,6 +15,24 @@ add_ur_library(ur_loader
     ${CMAKE_CURRENT_BINARY_DIR}/UrLoaderVersion.rc
 )
 
+if (MSVC)
+    set(TARGET_LIBNAME ur_loader)
+    string(TOUPPER ${TARGET_LIBNAME} TARGET_LIBNAME)
+
+    set(LOADER_VERSION_SCRIPT ${CMAKE_CURRENT_BINARY_DIR}/ur_loader.def)
+    configure_file(${CMAKE_CURRENT_SOURCE_DIR}/loader.def.in ${LOADER_VERSION_SCRIPT} @ONLY)
+    set_target_properties(ur_loader PROPERTIES
+        LINK_FLAGS "/DEF:${LOADER_VERSION_SCRIPT}"
+    )
+else()
+    set(TARGET_LIBNAME libur_loader_${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR})
+    string(TOUPPER ${TARGET_LIBNAME} TARGET_LIBNAME)
+
+    set(LOADER_VERSION_SCRIPT ${CMAKE_CURRENT_BINARY_DIR}/ur_loader.map)
+    configure_file(${CMAKE_CURRENT_SOURCE_DIR}/loader.map.in ${LOADER_VERSION_SCRIPT} @ONLY)
+    target_link_options(ur_loader PRIVATE "-Wl,--version-script=${LOADER_VERSION_SCRIPT}")
+endif()
+
 set_target_properties(ur_loader PROPERTIES
     LIBRARY_OUTPUT_NAME ur_loader
     RUNTIME_OUTPUT_NAME ur_loader