From ad118caa9f690114d11384b0813f30980cc333f3 Mon Sep 17 00:00:00 2001
From: Nick Alcock <nick.alcock@oracle.com>
Date: Tue, 4 Jun 2019 15:04:49 +0100
Subject: libctf: work on platforms without O_CLOEXEC.

(Not tested on any such platforms, since I don't have access to any at
the moment.  Testing encouraged.)

libctf/
	* configure.ac: Check for O_CLOEXEC.
	* ctf-decls.h (O_CLOEXEC): Define (to 0), if need be.
	* config.h.in: Regenerate.
---
 libctf/configure.ac | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'libctf/configure.ac')

diff --git a/libctf/configure.ac b/libctf/configure.ac
index beb90ba..2a1a80b 100644
--- a/libctf/configure.ac
+++ b/libctf/configure.ac
@@ -133,6 +133,22 @@ esac
 
 AM_CONDITIONAL(NEED_CTF_QSORT_R, test "${ac_cv_libctf_qsort_r_signature}" = unknown)
 
+AC_CACHE_CHECK([for O_CLOEXEC], [ac_cv_libctf_macro_O_CLOEXEC],
+  [AC_LINK_IFELSE(
+    [AC_LANG_PROGRAM([[#include <fcntl.h>
+                       #ifndef O_CLOEXEC
+                         choke me;
+                       #endif
+                     ]],
+                     [[return O_CLOEXEC;]])],
+    [ac_cv_libctf_macro_O_CLOEXEC=yes],
+    [ac_cv_libctf_macro_O_CLOEXEC=no])])
+
+if test $ac_cv_libctf_macro_O_CLOEXEC = yes; then
+  AC_DEFINE([HAVE_O_CLOEXEC], 1,
+	    [Whether the platform has a definition of O_CLOEXEC.])
+fi
+
 AC_CONFIG_FILES(Makefile)
 AC_CONFIG_HEADERS(config.h)
 AC_OUTPUT
-- 
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