From b149fa7d4bf030562bcd68d8150a474ea6d20687 Mon Sep 17 00:00:00 2001
From: peter <peter@FreeBSD.org>
Date: Sat, 28 Dec 1996 17:10:52 +0000
Subject: When linking with no rtld support, provide stub dl*() functions that
 just return errors.  This removes the need for awful hacks like that in our
 build of libtcl which would get link errors when linked static.

John Polstra once mentioned that this was on his "todo" list.

Note that one can use:
  cc -Wl,-Bstatic -o foo foo.o
and get an executable that has it's libraries statically linked, but has
a fully functional runtime linker so the executable can call dlopen() and
have it work.  (I've tested this)
---
 lib/csu/i386/crt0.c | 44 +++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 43 insertions(+), 1 deletion(-)

(limited to 'lib/csu')

diff --git a/lib/csu/i386/crt0.c b/lib/csu/i386/crt0.c
index a14a408..6ff4f0b 100644
--- a/lib/csu/i386/crt0.c
+++ b/lib/csu/i386/crt0.c
@@ -27,11 +27,13 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- *	$Id: crt0.c,v 1.24 1996/10/01 00:54:48 peter Exp $
+ *	$Id: crt0.c,v 1.25 1996/10/06 03:19:26 steve Exp $
  */
 
 #include <sys/param.h>
+
 #include <stdlib.h>
+#include <dlfcn.h>
 
 #ifdef DYNAMIC
 #include <sys/types.h>
@@ -382,8 +384,48 @@ _getenv(name)
 	asm("		movl	$-1,%eax");
 	asm("		ret");
 
+#else /* DYNAMIC */
+
+/*
+ * DL stubs for static linking case (just return error)
+ */
+
+void *
+dlopen(name, mode)
+char	*name;
+int	mode;
+{
+	return NULL;
+}
+
+int
+dlclose(fd)
+void	*fd;
+{
+	return -1;
+}
+
+void *
+dlsym(fd, name)
+void	*fd;
+char	*name;
+{
+	return NULL;
+}
+
+
+char *
+dlerror()
+{
+	return "Service unavailable";
+}
 #endif /* DYNAMIC */
 
+
+/*
+ * Support routines
+ */
+
 #ifdef MCRT0
 asm ("	.text");
 asm ("_eprol:");
-- 
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