From b1acbafbca94c75ce528b82ec5de1b24b98336e9 Mon Sep 17 00:00:00 2001
From: Jeremy Schonfeld <1004103+jmschonfeld@users.noreply.github.com>
Date: Fri, 14 Jun 2024 09:47:54 -0700
Subject: [PATCH] Fix calloc build failure on macOS (#680)

---
 .../String/StringProtocol+Essentials.swift                  | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Sources/FoundationEssentials/String/StringProtocol+Essentials.swift b/Sources/FoundationEssentials/String/StringProtocol+Essentials.swift
index ab691616..5c2022a3 100644
--- a/Sources/FoundationEssentials/String/StringProtocol+Essentials.swift
+++ b/Sources/FoundationEssentials/String/StringProtocol+Essentials.swift
@@ -13,6 +13,12 @@
 internal import _ForSwiftFoundation
 #endif
 
+#if canImport(Darwin)
+import Darwin
+#elseif canImport(Glibc)
+import Glibc
+#endif
+
 // These provides concrete implementations for String and Substring, enhancing performance over generic StringProtocol.
 
 @available(FoundationPreview 0.4, *)