Split <setjmp.h> out of <csetjmp>.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@249743 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 44 insertions, 4 deletions

diff --git a/include/csetjmp b/include/csetjmp
index d0b2c0789..58a9c73ab 100644
--- a/include/csetjmp
+++ b/include/csetjmp
@@ -38,10 +38,6 @@ void longjmp(jmp_buf env, int val);
 #pragma GCC system_header
 #endif
 
-#ifndef setjmp
-#define setjmp(env) setjmp(env)
-#endif
-
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 using ::jmp_buf;
diff --git a/include/setjmp.h b/include/setjmp.h
new file mode 100644
index 000000000..d429c8624
--- /dev/null
+++ b/include/setjmp.h
@@ -0,0 +1,40 @@
+// -*- C++ -*-
+//===--------------------------- setjmp.h ---------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP_SETJMP_H
+#define _LIBCPP_SETJMP_H
+
+/*
+    setjmp.h synopsis
+
+Macros:
+
+    setjmp
+
+Types:
+
+    jmp_buf
+
+void longjmp(jmp_buf env, int val);
+
+*/
+
+#include <__config>
+#include_next <setjmp.h>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#pragma GCC system_header
+#endif
+
+#ifndef setjmp
+#define setjmp(env) setjmp(env)
+#endif
+
+#endif  // _LIBCPP_SETJMP_H
diff --git a/test/std/depr/depr.c.headers/setjmp_h.pass.cpp b/test/std/depr/depr.c.headers/setjmp_h.pass.cpp
index 36f425390..9bc35b747 100644
--- a/test/std/depr/depr.c.headers/setjmp_h.pass.cpp
+++ b/test/std/depr/depr.c.headers/setjmp_h.pass.cpp
@@ -12,6 +12,10 @@
 #include <setjmp.h>
 #include <type_traits>
 
+#ifndef setjmp
+#error setjmp not defined
+#endif
+
 int main()
 {
     jmp_buf jb;