From 06e3ec7a542ede97986cbab8066b1293b1cd2751 Mon Sep 17 00:00:00 2001
From: Bruce Momjian
Date: Fri, 12 Sep 2003 16:10:27 +0000
Subject: Implement compiler #error if spinlock code not found, add configure
 flag to bypass the error, --without-spinlocks.

---
 src/include/pg_config.h.in   | 3 +++
 src/include/storage/s_lock.h | 8 ++++++--
 2 files changed, 9 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/include/pg_config.h.in b/src/include/pg_config.h.in
index 03874772cd0..8c04b8e6b47 100644
--- a/src/include/pg_config.h.in
+++ b/src/include/pg_config.h.in
@@ -357,6 +357,9 @@
 /* Define to 1 if you have the `snprintf' function. */
 #undef HAVE_SNPRINTF
 
+/* Define to 1 if you have spinlocks. */
+#undef HAVE_SPINLOCKS
+
 /* Define to 1 if you have the `srandom' function. */
 #undef HAVE_SRANDOM
 
diff --git a/src/include/storage/s_lock.h b/src/include/storage/s_lock.h
index 82795180439..4d49c52c711 100644
--- a/src/include/storage/s_lock.h
+++ b/src/include/storage/s_lock.h
@@ -63,7 +63,7 @@
  * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- *	  $Id: s_lock.h,v 1.112 2003/08/04 02:40:15 momjian Exp $
+ *	  $Id: s_lock.h,v 1.113 2003/09/12 16:10:27 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -537,7 +537,11 @@ extern slock_t wc_tas(volatile slock_t *lock);
 
 
 
-#else							/* !HAS_TEST_AND_SET */
+#else	 /* HAS_TEST_AND_SET */
+
+#ifdef HAVE_SPINLOCKS
+#error This platform does not support native spinlocks.  To continue the compile, rerun configure using --without-spinlocks.  However, performance will be poor.  Please report this to pgsql-bugs@postgresql.org.
+#endif
 
 /*
  * Fake spinlock implementation using semaphores --- slow and prone
-- 
cgit v1.2.3