Remove #ifndef self-test from generated headers

Author: frobtech

libc/utils/hdrgen/header.py

@@ -50,7 +50,8 @@ def public_api(self):
         ] + [""]
 
         for macro in self.macros:
-            content.append(f"{macro}\n")
+            if str(macro):
+                content.append(f"{macro}\n")
 
         for type_ in self.types:
             content.append(f"{type_}")

libc/utils/hdrgen/macro.py

@@ -15,9 +15,7 @@ def __init__(self, name, value=None, header=None):
 
     def __str__(self):
         if self.header != None:
-            return f"""#ifndef {self.name}
-#error "{self.name} should be defined by llvm-libc-macros/{self.header}"
-#endif"""
+            return ""
         if self.value != None:
             return f"#define {self.name} {self.value}"
         return f"#define {self.name}"

libc/utils/hdrgen/tests/expected_output/test_header.h

@@ -22,14 +22,6 @@
 
 #define MACRO_C
 
-#ifndef MACRO_D
-#error "MACRO_D should be defined by llvm-libc-macros/test_small-macros.h"
-#endif
-
-#ifndef MACRO_E
-#error "MACRO_E should be defined by llvm-libc-macros/test_more-macros.h"
-#endif
-
 #include <llvm-libc-types/type_a.h>
 #include <llvm-libc-types/type_b.h>