[llvm] [Cygwin] Cygwin general (PR #74941)

[徐持恒 Xu Chiheng via llvm-commits]

https://github.com/xu-chiheng updated https://github.com/llvm/llvm-project/pull/74941

>From 2eebcd71ed5be84bcf5b18208a54ceb5156f15a9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BE=90=E6=8C=81=E6=81=92=20Xu=20Chiheng?=
 <chiheng.xu at gmail.com>
Date: Sun, 10 Dec 2023 01:22:11 +0800
Subject: [PATCH] 1

---
 llvm/lib/Support/raw_ostream.cpp | 4 ----
 llvm/tools/lli/lli.cpp           | 7 -------
 2 files changed, 11 deletions(-)

diff --git a/llvm/lib/Support/raw_ostream.cpp b/llvm/lib/Support/raw_ostream.cpp
index 8908e7b6a150ca..278eb988b2e9db 100644
--- a/llvm/lib/Support/raw_ostream.cpp
+++ b/llvm/lib/Support/raw_ostream.cpp
@@ -37,10 +37,6 @@
 # include <unistd.h>
 #endif
 
-#if defined(__CYGWIN__)
-#include <io.h>
-#endif
-
 #if defined(_MSC_VER)
 #include <io.h>
 #ifndef STDIN_FILENO
diff --git a/llvm/tools/lli/lli.cpp b/llvm/tools/lli/lli.cpp
index 36fca4c40ed064..3e83e939461292 100644
--- a/llvm/tools/lli/lli.cpp
+++ b/llvm/tools/lli/lli.cpp
@@ -75,13 +75,6 @@
 #include <io.h>
 #endif
 
-#ifdef __CYGWIN__
-#include <cygwin/version.h>
-#if defined(CYGWIN_VERSION_DLL_MAJOR) && CYGWIN_VERSION_DLL_MAJOR<1007
-#define DO_NOTHING_ATEXIT 1
-#endif
-#endif
-
 using namespace llvm;
 
 static codegen::RegisterCodeGenFlags CGF;