Remove the #include <setjmp.h> from _CStdlib.h

Author: kateinoigakukun

schemes/main/swift-foundation/0001-Remove-the-include-setjmp.h-from-_CStdlib.h.patch

@@ -0,0 +1,35 @@
+From cb22941ea55af1ce0c48cf21bf23aca56702461d Mon Sep 17 00:00:00 2001
+From: Yuta Saito <[email protected]>
+Date: Sun, 18 Aug 2024 14:02:58 +0000
+Subject: [PATCH] Remove the `#include <setjmp.h>` from `_CStdlib.h`
+
+It seems like we don't use neither setjmp nor longjmp in the Foundation
+codebase, so we can safely remove this include.
+The main motivation for this change is to fix the build with the latest
+wasi-libc version. Recent wasi-libc versions started to provide
+`setjmp.h` header but it raises compilation errors unless Exception
+Handling feature (still under standardization process) is enabled.
+
+See https://github.com/WebAssembly/wasi-libc/blob/wasi-sdk-22/libc-top-half/musl/include/setjmp.h
+---
+ Sources/_FoundationCShims/include/_CStdlib.h | 4 ----
+ 1 file changed, 4 deletions(-)
+
+diff --git a/Sources/_FoundationCShims/include/_CStdlib.h b/Sources/_FoundationCShims/include/_CStdlib.h
+index 87efc2d..15a72ca 100644
+--- a/Sources/_FoundationCShims/include/_CStdlib.h
++++ b/Sources/_FoundationCShims/include/_CStdlib.h
+@@ -55,10 +55,6 @@
+ #include <math.h>
+ #endif
+ 
+-#if __has_include(<setjmp.h>)
+-#include <setjmp.h>
+-#endif
+-
+ #if __has_include(<signal.h>)
+ /// Guard against including `signal.h` on WASI. The `signal.h` header file
+ /// itself is available in wasi-libc, but it's just a stub that doesn't actually
+-- 
+2.43.2
+