Support -complete flag to Go compiler

Summary:
From the task:
> We miss flag -complete that the standard build-system adds when there are not other files besides of plain Go.
It doesn't do any significant job for now just ensures some safety, but it's good to follow the reference build-system implementation.

Reviewed By: podtserkovskiy

Differential Revision: D68097048

fbshipit-source-id: 19b57465a01e654135ea6d788b48ee68d8865b54

prelude/go/package_builder.bzl

@@ -74,11 +74,30 @@ def build_package(
 
         symabis = _symabis(ctx, pkg_name, main, go_list.s_files, go_list.h_files, assembler_flags)
 
+        # Use -complete flag when compiling Go code only
+        complete_flag = len(go_list.cgo_files) + len(go_list.s_files) == 0
+
         def build_variant(shared: bool) -> Artifact:
             suffix = ",shared" if shared else ",non-shared"  # suffix to make artifacts unique
             go_files_to_compile = covered_go_files + ((go_list.test_go_files + go_list.x_test_go_files) if tests else [])
             importcfg = make_importcfg(ctx, pkg_name, all_pkgs, shared)
-            go_a_file, asmhdr = _compile(ctx, pkg_name, main, go_files_to_compile, importcfg, compiler_flags, shared, race, asan, suffix, embedcfg, go_list.embed_files, symabis, len(go_list.s_files) > 0)
+            go_a_file, asmhdr = _compile(
+                ctx = ctx,
+                pkg_name = pkg_name,
+                main = main,
+                go_srcs = go_files_to_compile,
+                importcfg = importcfg,
+                compiler_flags = compiler_flags,
+                shared = shared,
+                race = race,
+                asan = asan,
+                suffix = suffix,
+                complete = complete_flag,
+                embedcfg = embedcfg,
+                embed_files = go_list.embed_files,
+                symabis = symabis,
+                gen_asmhdr = len(go_list.s_files) > 0,
+            )
 
             asm_o_files = _asssembly(ctx, pkg_name, main, go_list.s_files, go_list.h_files, asmhdr, assembler_flags, shared, suffix)
 
@@ -113,6 +132,7 @@ def _compile(
         race: bool,
         asan: bool,
         suffix: str,
+        complete: bool,
         embedcfg: Artifact | None = None,
         embed_files: list[Artifact] = [],
         symabis: Artifact | None = None,
@@ -150,6 +170,7 @@ def _compile(
             ["-embedcfg", embedcfg] if embedcfg else [],
             ["-symabis", symabis] if symabis else [],
             ["-asmhdr", asmhdr.as_output()] if asmhdr else [],
+            ["-complete"] if complete else [],
             cmd_args(srcs_argsfile, format = "@{}", hidden = go_srcs),
         ],
         hidden = embed_files,  #  files and directories should be available for embedding