From 98ca18573eff36565891d85a6c52445528514116 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fred=20Helmesj=C3=B6?= <helmesjo@gmail.com>
Date: Thu, 1 Sep 2022 09:26:57 +0200
Subject: [PATCH] Add HAVE_SLEEP, HAVE_USLEEP, HAVE_NANOSLEEP (GH PR #26)

---
 .../autoconf/checks/HAVE_NANOSLEEP.h          | 19 +++++++++++++++++++
 .../libbuild2/autoconf/checks/HAVE_SLEEP.h    | 19 +++++++++++++++++++
 .../libbuild2/autoconf/checks/HAVE_USLEEP.h   | 18 ++++++++++++++++++
 3 files changed, 56 insertions(+)
 create mode 100644 libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_NANOSLEEP.h
 create mode 100644 libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_SLEEP.h
 create mode 100644 libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_USLEEP.h

diff --git a/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_NANOSLEEP.h b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_NANOSLEEP.h
new file mode 100644
index 0000000..092e835
--- /dev/null
+++ b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_NANOSLEEP.h
@@ -0,0 +1,19 @@
+// HAVE_NANOSLEEP : BUILD2_AUTOCONF_LIBC_VERSION
+
+#ifndef BUILD2_AUTOCONF_LIBC_VERSION
+#  error BUILD2_AUTOCONF_LIBC_VERSION appears to be conditionally included
+#endif
+
+#undef HAVE_NANOSLEEP
+
+/* Since OpenBSD 2.1, FreeBSD 3.0, NetBSD 1.3, Mac OS X < 10.0,
+ * glibc 2.1 (?)
+ */
+#if defined(__linux__)                     || \
+    BUILD2_AUTOCONF_OPENBSD_PREREQ(199706) || \
+    BUILD2_AUTOCONF_FREEBSD_PREREQ(3, 0)   || \
+    BUILD2_AUTOCONF_NETBSD_PREREQ(1, 3)    || \
+    BUILD2_AUTOCONF_MACOS_PREREQ(10, 0)    || \
+    BUILD2_AUTOCONF_GLIBC_PREREQ(2, 1)
+#  define HAVE_NANOSLEEP 1
+#endif
diff --git a/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_SLEEP.h b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_SLEEP.h
new file mode 100644
index 0000000..c6e7012
--- /dev/null
+++ b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_SLEEP.h
@@ -0,0 +1,19 @@
+// HAVE_SLEEP : BUILD2_AUTOCONF_LIBC_VERSION
+
+#ifndef BUILD2_AUTOCONF_LIBC_VERSION
+#  error BUILD2_AUTOCONF_LIBC_VERSION appears to be conditionally included
+#endif
+
+#undef HAVE_SLEEP
+
+/* Since Version 4/7 AT&T UNIX.
+ * glibc 2.1 (?)
+ */
+#if defined(__linux__)                     || \
+    BUILD2_AUTOCONF_OPENBSD_PREREQ(199706) || \
+    BUILD2_AUTOCONF_FREEBSD_PREREQ(3, 0)   || \
+    BUILD2_AUTOCONF_NETBSD_PREREQ(1, 3)    || \
+    BUILD2_AUTOCONF_MACOS_PREREQ(10, 0)    || \
+    BUILD2_AUTOCONF_GLIBC_PREREQ(2, 1)
+#  define HAVE_SLEEP 1
+#endif
diff --git a/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_USLEEP.h b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_USLEEP.h
new file mode 100644
index 0000000..a05574e
--- /dev/null
+++ b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_USLEEP.h
@@ -0,0 +1,18 @@
+// HAVE_USLEEP : BUILD2_AUTOCONF_LIBC_VERSION
+
+#ifndef BUILD2_AUTOCONF_LIBC_VERSION
+#  error BUILD2_AUTOCONF_LIBC_VERSION appears to be conditionally included
+#endif
+
+#undef HAVE_USLEEP
+
+/* Since 4.3BSD (OpenBSD, FreeBSD, NetBSD, Mac OS X),
+ * glibc 2.1 (?)
+ */
+#if defined(__FreeBSD__)                || \
+    defined(__OpenBSD__)                || \
+    defined(__NetBSD__)                 || \
+    defined(BUILD2_AUTOCONF_MACOS)      || \
+    BUILD2_AUTOCONF_GLIBC_PREREQ(2, 1)
+#  define HAVE_USLEEP 1
+#endif