From 4db18f700bc090187e733d9e2e5f137c6a59986a Mon Sep 17 00:00:00 2001
From: Si Beaumont <beaumont@apple.com>
Date: Wed, 8 May 2024 13:25:24 +0100
Subject: [PATCH] Support compiling against Musl libc

---
 Sources/Backtrace/Backtrace.swift | 6 ++++++
 Sources/Backtrace/Demangle.swift  | 6 ++++++
 Sources/Sample/main.swift         | 6 ++++++
 3 files changed, 18 insertions(+)

diff --git a/Sources/Backtrace/Backtrace.swift b/Sources/Backtrace/Backtrace.swift
index b69b450..61b5548 100644
--- a/Sources/Backtrace/Backtrace.swift
+++ b/Sources/Backtrace/Backtrace.swift
@@ -28,7 +28,13 @@ public enum Backtrace {
 
 #elseif os(Linux)
 import CBacktrace
+#if canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
+#else
+#error("Unsupported runtime")
+#endif
 
 typealias CBacktraceErrorCallback = @convention(c) (_ data: UnsafeMutableRawPointer?, _ msg: UnsafePointer<CChar>?, _ errnum: CInt) -> Void
 typealias CBacktraceFullCallback = @convention(c) (_ data: UnsafeMutableRawPointer?, _ pc: UInt, _ filename: UnsafePointer<CChar>?, _ lineno: CInt, _ function: UnsafePointer<CChar>?) -> CInt
diff --git a/Sources/Backtrace/Demangle.swift b/Sources/Backtrace/Demangle.swift
index 5993e41..089af97 100644
--- a/Sources/Backtrace/Demangle.swift
+++ b/Sources/Backtrace/Demangle.swift
@@ -13,7 +13,13 @@
 //===----------------------------------------------------------------------===//
 
 #if os(Linux)
+#if canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
+#else
+#error("Unsupported runtime")
+#endif
 #elseif os(Windows)
 #if swift(<5.4)
 #error("unsupported Swift version")
diff --git a/Sources/Sample/main.swift b/Sources/Sample/main.swift
index 994bf55..e28613b 100644
--- a/Sources/Sample/main.swift
+++ b/Sources/Sample/main.swift
@@ -16,7 +16,13 @@ import Backtrace
 #if canImport(Darwin)
 import Darwin
 #elseif os(Linux)
+#if canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
+#else
+#error("Unsupported runtime")
+#endif
 #endif
 
 #if swift(<5.9) || os(Windows)