From f5553bfefcca2690b557ea080d8ae431b7d9b5d9 Mon Sep 17 00:00:00 2001
From: Evan Haas <evan@lagerdata.com>
Date: Tue, 31 Aug 2021 13:33:44 -0700
Subject: [PATCH] translate-c: Only consider public decls in isBuiltinDefined

---
 src/translate_c.zig  | 1 +
 test/translate_c.zig | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/src/translate_c.zig b/src/translate_c.zig
index f95c18d8f1..5b21747324 100644
--- a/src/translate_c.zig
+++ b/src/translate_c.zig
@@ -1990,6 +1990,7 @@ fn transImplicitCastExpr(
 
 fn isBuiltinDefined(name: []const u8) bool {
     inline for (meta.declarations(std.zig.c_builtins)) |decl| {
+        if (!decl.is_pub) continue;
         if (std.mem.eql(u8, name, decl.name)) return true;
     }
     return false;
diff --git a/test/translate_c.zig b/test/translate_c.zig
index fb8e54d5e6..89c6bda632 100644
--- a/test/translate_c.zig
+++ b/test/translate_c.zig
@@ -3672,4 +3672,10 @@ pub fn addCases(cases: *tests.TranslateCContext) void {
     , &[_][]const u8{
         \\pub const FOO = __builtin_popcount;
     });
+
+    cases.add("Only consider public decls in `isBuiltinDefined`",
+        \\#define FOO std
+    , &[_][]const u8{
+        \\pub const FOO = @compileError("unable to translate macro: undefined identifier `std`");
+    });
 }