From 1902e39746ba2aaaa3ef1918e3b14d96023966df Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Mon, 26 Aug 2019 09:26:00 -0400
Subject: cmAffinity: Add include for CPU_ZERO on Alpine Linux

The definition of `CPU_ZERO` requires `<string.h>` to be included
explicitly for `memset`.  Since IWYU does not agree on other Linux
platforms, use a pragma to silence the warning.

Fixes: #19643
---
 Source/cmAffinity.cxx | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Source/cmAffinity.cxx b/Source/cmAffinity.cxx
index 588b2f2..09b0298 100644
--- a/Source/cmAffinity.cxx
+++ b/Source/cmAffinity.cxx
@@ -12,6 +12,8 @@
 #    define CM_HAVE_CPU_AFFINITY
 #    include <pthread.h>
 #    include <sched.h>
+// On some platforms CPU_ZERO needs memset but sched.h forgets string.h
+#    include <string.h> // IWYU pragma: keep
 #    if defined(__FreeBSD__)
 #      include <pthread_np.h>
 #      include <sys/cpuset.h>
-- 
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