From 13158f86e3904284dce3dad36b64f07414459551 Mon Sep 17 00:00:00 2001
From: rmanfredi <rmanfredi@2592e710-e01b-42a5-8df0-11608a6cc53d>
Date: Sat, 27 Nov 2010 11:55:39 +0000
Subject: Applied mega patch from Christian Biere to greatly improve feature
 detection and make a huge step towards better support for cross-compiling.

git-svn-id: svn://svn.code.sf.net/p/dist/code/trunk/dist@34 2592e710-e01b-42a5-8df0-11608a6cc53d
---
 mcon/U/d_lockf.U | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

(limited to 'mcon/U/d_lockf.U')

diff --git a/mcon/U/d_lockf.U b/mcon/U/d_lockf.U
index 062f753..3f2953f 100644
--- a/mcon/U/d_lockf.U
+++ b/mcon/U/d_lockf.U
@@ -14,7 +14,7 @@
 ?RCS: Revision 3.0.1.1  1994/08/29  16:09:36  ram
 ?RCS: patch32: created by ADO
 ?RCS:
-?MAKE:d_lockf: Inlibc
+?MAKE:d_lockf: Trylink cat i_unistd
 ?MAKE:	-pick add $@ %<
 ?S:d_lockf:
 ?S:	This variable conditionally defines HAS_LOCKF if lockf() is
@@ -28,6 +28,23 @@
 ?H:.
 ?LINT:set d_lockf
 : see if lockf exists
-set lockf d_lockf
-eval $inlibc
+$cat >try.c <<EOC
+#include <sys/types.h>
+#$i_unistd I_UNISTD
+#ifdef I_UNISTD
+#include <unistd.h>
+#endif
+int main(void)
+{
+	static int fd, ret;
+	static off_t size;
+	ret |= lockf(fd, F_ULOCK, size);
+	ret |= lockf(fd, F_LOCK, size);
+	ret |= lockf(fd, F_TLOCK, size);
+	ret |= lockf(fd, F_TEST, size);
+	return ret ? 0 : 1;
+}
+EOC
+set d_lockf
+eval $trylink
 
-- 
cgit v1.2.3