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stage2: lay the groundwork in prep for extern fn

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This commit lays the groundwork in preparation for implementing
handling of extern functions in various backends.
This commit is contained in:
Jakub Konka
2021-01-08 23:16:50 +01:00
committed by Andrew Kelley
parent a021c7b1b2
commit 5487dd13ea
6 changed files with 74 additions and 6 deletions
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45
src/Module.zig
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@@ -22,6 +22,7 @@ const ast = std.zig.ast;
const trace = @import("tracy.zig").trace;
const astgen = @import("astgen.zig");
const zir_sema = @import("zir_sema.zig");
const target_util = @import("target.zig");
const default_eval_branch_quota = 1000;
@@ -1109,8 +1110,48 @@ fn astGenAndAnalyzeDecl(self: *Module, decl: *Decl) !bool {
if (fn_proto.getVarArgsToken()) |var_args_token| {
return self.failTok(&fn_type_scope.base, var_args_token, "TODO implement var args", .{});
}
if (fn_proto.getLibName()) |lib_name| {
return self.failNode(&fn_type_scope.base, lib_name, "TODO implement function library name", .{});
if (fn_proto.getLibName()) |lib_name| blk: {
const lib_name_str = mem.trim(u8, tree.tokenSlice(lib_name.firstToken()), "\""); // TODO: call identifierTokenString
log.debug("extern fn symbol expected in lib '{s}'", .{lib_name_str});
const target = self.comp.getTarget();
if (target_util.is_libc_lib_name(target, lib_name_str)) {
if (!self.comp.bin_file.options.link_libc) {
return self.failNode(
&fn_type_scope.base,
lib_name,
"dependency on libc must be explicitly specified in the build command",
.{},
);
}
break :blk;
}
if (target_util.is_libcpp_lib_name(target, lib_name_str)) {
if (!self.comp.bin_file.options.link_libcpp) {
return self.failNode(
&fn_type_scope.base,
lib_name,
"dependency on libc++ must be explicitly specified in the build command",
.{},
);
}
break :blk;
}
if (!target.isWasm() and !self.comp.bin_file.options.pic) {
return self.failNode(
&fn_type_scope.base,
lib_name,
"dependency on dynamic library '{s}' requires enabling Position Independent Code. Fixed by `-l{s}` or `-fPIC`.",
.{ lib_name, lib_name },
);
}
self.comp.stage1AddLinkLib(lib_name_str) catch |err| {
return self.failNode(
&fn_type_scope.base,
lib_name,
"unable to add link lib '{s}': {s}",
.{ lib_name, @errorName(err) },
);
};
}
if (fn_proto.getAlignExpr()) |align_expr| {
return self.failNode(&fn_type_scope.base, align_expr, "TODO implement function align expression", .{});