From f317acb2cdaaba46c8eaa4b06be6651e3a9fd34e Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Fri, 1 Oct 2021 18:06:17 -0700
Subject: [PATCH] libcxx: pass -faligned-allocation flag when needed

libc++ now requires this flag
---
 src/libcxx.zig | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/libcxx.zig b/src/libcxx.zig
index 3b4f4d3d32..2cff5d738a 100644
--- a/src/libcxx.zig
+++ b/src/libcxx.zig
@@ -148,6 +148,12 @@ pub fn buildLibCXX(comp: *Compilation) !void {
             try cflags.append("-fno-exceptions");
         }
 
+        if (target.os.tag == .zos) {
+            try cflags.append("-fno-aligned-allocation");
+        } else {
+            try cflags.append("-faligned-allocation");
+        }
+
         try cflags.append("-I");
         try cflags.append(cxx_include_path);