From 6b88084658c3a751072c3e0f7d70bca3fb234bc5 Mon Sep 17 00:00:00 2001
From: KWSys Upstream <kwrobot@kitware.com>
Date: Fri, 3 Jun 2022 06:41:27 -0400
Subject: KWSys 2022-06-03 (c28e27bc)

Code extracted from:

    https://gitlab.kitware.com/utils/kwsys.git

at commit c28e27bc4ad8e12d88b05f30eec19b2987c60721 (master).

Upstream Shortlog
-----------------

Brad King (3):
      591c4efb Activate POSIX APIs even without compiler extensions
      45f20b83 Fix XL/XLClang warning suppression under CMP0089 NEW behavior
      257b1111 Configure with policies through CMake 3.22
---
 CMakeLists.txt         | 14 ++------------
 ProcessUNIX.c          |  4 ++++
 Terminal.c             |  4 ++++
 testProcess.c          |  4 ++++
 testSharedForward.c.in |  4 ++++
 5 files changed, 18 insertions(+), 12 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2253a83..af02f7f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -88,17 +88,7 @@
 # any outside mailing list and no documentation of the change will be
 # written.
 
-cmake_minimum_required(VERSION 3.1 FATAL_ERROR)
-foreach(p
-    CMP0056 # CMake 3.2, Honor link flags in try_compile() source-file signature.
-    CMP0063 # CMake 3.3, Honor visibility properties for all target types.
-    CMP0067 # CMake 3.8, Honor language standard in try_compile source-file signature.
-    CMP0069 # CMake 3.9, INTERPROCEDURAL_OPTIMIZATION is enforced when enabled.
-    )
-  if(POLICY ${p})
-    cmake_policy(SET ${p} NEW)
-  endif()
-endforeach()
+cmake_minimum_required(VERSION 3.9...3.22 FATAL_ERROR)
 
 # Some configure checks depend upon the deployment target. Clear checks when
 # the deployment target changes.
@@ -1111,7 +1101,7 @@ if(KWSYS_STANDALONE OR CMake_SOURCE_DIR)
     # Some Apple compilers produce bad optimizations in this source.
     if(APPLE AND CMAKE_C_COMPILER_ID MATCHES "^(GNU|LLVM)$")
       set(testProcess_COMPILE_FLAGS "${testProcess_COMPILE_FLAGS} -O0")
-    elseif(CMAKE_C_COMPILER_ID STREQUAL "XL")
+    elseif(CMAKE_C_COMPILER_ID MATCHES "^(XL|XLClang)$")
       # Tell IBM XL not to warn about our test infinite loop
       if(CMAKE_SYSTEM MATCHES "Linux.*ppc64le"
          AND CMAKE_C_COMPILER_VERSION VERSION_LESS "16.1.0"
diff --git a/ProcessUNIX.c b/ProcessUNIX.c
index 22cbf06..45a9e6f 100644
--- a/ProcessUNIX.c
+++ b/ProcessUNIX.c
@@ -1,5 +1,9 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing#kwsys for details.  */
+#if !defined(_WIN32) && !defined(__APPLE__) && !defined(__OpenBSD__)
+/* NOLINTNEXTLINE(bugprone-reserved-identifier) */
+#  define _XOPEN_SOURCE 600
+#endif
 #include "kwsysPrivate.h"
 #include KWSYS_HEADER(Process.h)
 #include KWSYS_HEADER(System.h)
diff --git a/Terminal.c b/Terminal.c
index 20bb5fe..39081a7 100644
--- a/Terminal.c
+++ b/Terminal.c
@@ -1,5 +1,9 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing#kwsys for details.  */
+#if !defined(_WIN32) && !defined(__APPLE__) && !defined(__OpenBSD__)
+/* NOLINTNEXTLINE(bugprone-reserved-identifier) */
+#  define _XOPEN_SOURCE 600
+#endif
 #include "kwsysPrivate.h"
 #include KWSYS_HEADER(Terminal.h)
 
diff --git a/testProcess.c b/testProcess.c
index eed770c..fcc31da 100644
--- a/testProcess.c
+++ b/testProcess.c
@@ -1,5 +1,9 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing#kwsys for details.  */
+#if !defined(_WIN32) && !defined(__APPLE__) && !defined(__OpenBSD__)
+/* NOLINTNEXTLINE(bugprone-reserved-identifier) */
+#  define _XOPEN_SOURCE 600
+#endif
 #include "kwsysPrivate.h"
 #include KWSYS_HEADER(Process.h)
 #include KWSYS_HEADER(Encoding.h)
diff --git a/testSharedForward.c.in b/testSharedForward.c.in
index b3eb413..e909458 100644
--- a/testSharedForward.c.in
+++ b/testSharedForward.c.in
@@ -1,5 +1,9 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing#kwsys for details.  */
+#if !defined(_WIN32) && !defined(__APPLE__) && !defined(__OpenBSD__)
+/* NOLINTNEXTLINE(bugprone-reserved-identifier) */
+#  define _XOPEN_SOURCE 600
+#endif
 #if defined(CMAKE_INTDIR)
 #  define CONFIG_DIR_PRE CMAKE_INTDIR "/"
 #  define CONFIG_DIR_POST "/" CMAKE_INTDIR
-- 
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