compiler: miscellaneous branch progress

implement builtin.zig file population for all modules rather than
assuming there is only one global builtin.zig module.

move some fields from link.File to Compilation
move some fields from Module to Compilation

compute debug_format in global Compilation config resolution

wire up C compilation to the concept of owner modules

make whole cache mode call link.File.createEmpty() instead of
link.File.open()

1 files changed, 6 insertions, 1 deletions

diff --git a/src/Sema.zig b/src/Sema.zig
index 910b1cca47..2d46faf435 100644
--- a/src/Sema.zig
+++ b/src/Sema.zig
@@ -784,6 +784,11 @@ pub const Block = struct {
         }
     }
 
+    pub fn ownerModule(block: Block) *Package.Module {
+        const zcu = block.sema.mod;
+        return zcu.namespacePtr(block.namespace).file_scope.mod;
+    }
+
     pub fn startAnonDecl(block: *Block) !WipAnonDecl {
         return WipAnonDecl{
             .block = block,
@@ -5733,7 +5738,7 @@ fn zirCImport(sema: *Sema, parent_block: *Block, inst: Zir.Inst.Index) CompileEr
     // Ignore the result, all the relevant operations have written to c_import_buf already.
     _ = try sema.analyzeBodyBreak(&child_block, body);
 
-    var c_import_res = comp.cImport(c_import_buf.items) catch |err|
+    var c_import_res = comp.cImport(c_import_buf.items, parent_block.ownerModule()) catch |err|
         return sema.fail(&child_block, src, "C import failed: {s}", .{@errorName(err)});
     defer c_import_res.deinit(gpa);