error messages for attempted cache when zig cannot perfectly do it

1 files changed, 6 insertions, 0 deletions

diff --git a/src/ir.cpp b/src/ir.cpp
index 858a6df33c..030f6627ad 100644
--- a/src/ir.cpp
+++ b/src/ir.cpp
@@ -17961,6 +17961,12 @@ static ZigType *ir_analyze_instruction_type_name(IrAnalyze *ira, IrInstructionTy
 }
 
 static ZigType *ir_analyze_instruction_c_import(IrAnalyze *ira, IrInstructionCImport *instruction) {
+    if (ira->codegen->enable_cache) {
+        ir_add_error(ira, &instruction->base,
+            buf_sprintf("TODO @cImport is incompatible with --cache on. The cache system currently is unable to detect subsequent changes in .h files."));
+        return ira->codegen->builtin_types.entry_invalid;
+    }
+
     AstNode *node = instruction->base.source_node;
     assert(node->type == NodeTypeFnCallExpr);
     AstNode *block_node = node->data.fn_call_expr.params.at(0);