Add an option -O <filename> to ld. From the manpage:

     -O filename
             Specifies the name of the output file.  The file is created as
             filename.tmp and when output is complete renamed to filename.
This allows us to:
	ld -O ${.TARGET} -x -r ${.TARGET}

3 files changed, 30 insertions, 3 deletions

diff --git a/gnu/usr.bin/ld/ld.1 b/gnu/usr.bin/ld/ld.1
index f3a12c4..0c9545a 100644
--- a/gnu/usr.bin/ld/ld.1
+++ b/gnu/usr.bin/ld/ld.1
@@ -27,7 +27,7 @@
 .\" (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: ld.1,v 1.8 1994/12/11 21:39:31 ats Exp $
+.\"	$Id: ld.1,v 1.9 1994/12/23 22:30:33 nate Exp $
 .\"
 .Dd October 14, 1993
 .Dt LD 1
@@ -49,6 +49,7 @@
 .Op Fl l Ar library-specifier
 .Op Fl L Ar library-search-path
 .Op Fl nostdlib
+.Op Fl O Ar filename
 .Op Fl o Ar filename
 .Op Fl T Ar address
 .Op Fl u Ar symbol
@@ -154,6 +155,12 @@ usually
 for
 .Ar -l
 specified libraries.
+.It Fl O Ar filename
+Specifies the name of the output file.
+The file is created as
+.Ar filename .tmp
+and when output is complete renamed to
+.Ar filename .
 .It Fl o Ar filename
 Specifies the name of the output file. Defaults to
 .Dq a.out.
diff --git a/gnu/usr.bin/ld/ld.1aout b/gnu/usr.bin/ld/ld.1aout
index f3a12c4..0c9545a 100644
--- a/gnu/usr.bin/ld/ld.1aout
+++ b/gnu/usr.bin/ld/ld.1aout
@@ -27,7 +27,7 @@
 .\" (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: ld.1,v 1.8 1994/12/11 21:39:31 ats Exp $
+.\"	$Id: ld.1,v 1.9 1994/12/23 22:30:33 nate Exp $
 .\"
 .Dd October 14, 1993
 .Dt LD 1
@@ -49,6 +49,7 @@
 .Op Fl l Ar library-specifier
 .Op Fl L Ar library-search-path
 .Op Fl nostdlib
+.Op Fl O Ar filename
 .Op Fl o Ar filename
 .Op Fl T Ar address
 .Op Fl u Ar symbol
@@ -154,6 +155,12 @@ usually
 for
 .Ar -l
 specified libraries.
+.It Fl O Ar filename
+Specifies the name of the output file.
+The file is created as
+.Ar filename .tmp
+and when output is complete renamed to
+.Ar filename .
 .It Fl o Ar filename
 Specifies the name of the output file. Defaults to
 .Dq a.out.
diff --git a/gnu/usr.bin/ld/ld.c b/gnu/usr.bin/ld/ld.c
index 49384f2..a0d8ee1 100644
--- a/gnu/usr.bin/ld/ld.c
+++ b/gnu/usr.bin/ld/ld.c
@@ -32,7 +32,7 @@ static char sccsid[] = "@(#)ld.c	6.10 (Berkeley) 5/22/91";
    Set, indirect, and warning symbol features added by Randy Smith. */
 
 /*
- *	$Id: ld.c,v 1.31 1995/10/24 06:47:57 ache Exp $
+ *	$Id: ld.c,v 1.32 1996/04/24 23:31:08 jdp Exp $
  */
 
 /* Define how to initialize system-dependent header fields.  */
@@ -135,6 +135,7 @@ int			input_desc;
 
 /* The name of the file to write; "a.out" by default. */
 char		*output_filename;	/* Output file name. */
+char		*real_output_filename;	/* Output file name. */
 FILE		*outstream;		/* Output file descriptor. */
 struct exec	outheader;		/* Output file header. */
 int		magic;			/* Output file magic. */
@@ -424,6 +425,7 @@ classify_arg(arg)
 	case 'e':
 	case 'L':
 	case 'l':
+	case 'O':
 	case 'o':
 	case 'u':
 	case 'V':
@@ -697,6 +699,13 @@ decode_option(swt, arg)
 		magic = NMAGIC;
 		return;
 
+	case 'O':
+		output_filename = malloc(strlen(arg)+4);
+		strcpy(output_filename, arg);
+		strcat(output_filename, ".tmp");
+		real_output_filename = arg;
+		return;
+
 	case 'o':
 		output_filename = arg;
 		return;
@@ -2514,6 +2523,10 @@ write_output()
 	if (ferror(outstream) || fclose(outstream) != 0)
 		err(1, "write_output: %s", output_filename);
 	outstream = 0;
+	if (real_output_filename)
+		if (rename(output_filename, real_output_filename))
+			err(1, "rename output: %s to %s",
+				output_filename, real_output_filename);
 }
 
 /* Total number of symbols to be written in the output file. */