compiler: add import statement support for dynamic extensions

Utilize the new I_DYNLINK vm opcode to support import statements referring
to dynamic extension modules.

During compilation, the compiler will try to infer the type of the imported
module from the resolved file path; if it ends with `.so`, the module is
assumed to by a dynamic extension and loading/binding of the module is
deferred to runtime using I_DYNLINK opcodes.

Additionally, the `-c` cli option gained support for a new compiler flag
`dynlink=...` which allows forcing a particular module name expression
to be treated as dynamic extension. This is useful to e.g. force resolving
`import { x } from "foo"` to a dynamic extension `foo.so` loaded at runtime
even if a plain `foo.uc` exists in the search path during compilation or if
no such module is available at build time.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/ucode/types.h b/include/ucode/types.h
index 636d6e4..e20f3d6 100644
--- a/include/ucode/types.h
+++ b/include/ucode/types.h
@@ -227,6 +227,7 @@ typedef struct {
 	bool strict_declarations;
 	bool raw_mode;
 	uc_search_path_t module_search_path;
+	uc_search_path_t force_dynlink_list;
 } uc_parse_config_t;
 
 extern uc_parse_config_t uc_default_parse_config;