ld does not support -Zsym

[komh]

Hi/2.

ld does not support -Zsym unlike OMF linkers.

Here is the patch to support it:

0001-emxbind-ld-Add-Zsym-support.patch

From 0cfe86890fdbfee7e8f0a5c88d3e7e9ce85388f5 Mon Sep 17 00:00:00 2001
From: KO Myung-Hun <komh78@gmail.com>
Date: Tue, 2 Jun 2026 01:01:54 +0900
Subject: [PATCH] emxbind, ld: Add -Zsym support

---
 src/emx/src/emxbind/emxbind.c |  6 +++++-
 src/emx/src/emxbind/emxbind.h |  4 ++++
 src/emx/src/emxbind/map.c     | 20 ++++++++++++++++++++
 src/emx/src/ld/ld.c           | 14 ++++++++++++++
 4 files changed, 43 insertions(+), 1 deletion(-)

diff --git a/src/emx/src/emxbind/emxbind.c b/src/emx/src/emxbind/emxbind.c
index 25a8018..ba42e09 100644
--- a/src/emx/src/emxbind/emxbind.c
+++ b/src/emx/src/emxbind/emxbind.c
@@ -82,6 +82,7 @@ static void usage (void)
   puts ("  -h<size>    set heap size for OS/2 (-b only)");
   puts ("  -k<size>    set stack size for OS/2 (-b only)");
   puts ("  -m<map>     write .map file (-b only)");
+  puts ("  -y          write .sym file (-b and -m)");
   puts ("  -r<res>     add resources (-b only)");
   exit (1);
 }
@@ -337,7 +338,7 @@ static void get_args (void)
   /* Examine the initial (emxbind) options, one by one. */
 
   while ((c = getopt (gargc, gargv,
-                      "bc::d::efh:k:m:o:pqr:svw")) != -1)
+                      "bc::d::efh:k:m:o:pqr:svwy")) != -1)
     {
       switch (c)
 	{
@@ -409,6 +410,9 @@ static void get_args (void)
 	case 'w':
 	  opt_w = TRUE;
 	  break;
+	case 'y':
+	  opt_y = TRUE;
+	  break;
 	default:
 	  error ("invalid option");
 	}
diff --git a/src/emx/src/emxbind/emxbind.h b/src/emx/src/emxbind/emxbind.h
index 572aa61..b8f1704 100644
--- a/src/emx/src/emxbind/emxbind.h
+++ b/src/emx/src/emxbind/emxbind.h
@@ -212,6 +212,10 @@ EXTERN int opt_s INIT (FALSE);
 
 EXTERN int opt_w INIT (FALSE);
 
+/* Create a symbol file.  This flag is set by the -y option. */
+
+EXTERN int opt_y INIT (FALSE);
+
 /* The module name. */
 
 EXTERN char *module_name INIT (NULL);
diff --git a/src/emx/src/emxbind/map.c b/src/emx/src/emxbind/map.c
index 6a0578b..3791d38 100644
--- a/src/emx/src/emxbind/map.c
+++ b/src/emx/src/emxbind/map.c
@@ -23,6 +23,7 @@ Boston, MA 02111-1307, USA.  */
 #include <stdlib.h>
 #include <string.h>
 #include <alloca.h>
+#include <process.h>
 #include "defs.h"
 #include "emxbind.h"
 
@@ -271,6 +272,22 @@ static void map_entrypoint (void)
 }
 
 
+/* Write the .sym file. */
+
+static void write_sym (const char *map_fname)
+{
+  char *comspec;
+
+  comspec = getenv ("COMSPEC");
+  if (comspec == NULL)
+    comspec = "cmd.exe";
+
+  /* Invoke mapsym.cmd. */
+  if (spawnlp (P_WAIT, comspec, comspec, "/c", "mapsym.cmd", "link386",
+               map_fname, NULL) == -1)
+    error ("cannot spawn mapsym.cmd");
+}
+
 /* Write the .map file. */
 
 void write_map (const char *fname)
@@ -305,4 +322,7 @@ void write_map (const char *fname)
     error ("Cannot write `%s'", fname);
   if (fclose (map_file) != 0)
     error ("Cannot close `%s'", fname);
+
+  if (opt_y)
+    write_sym (fname);
 }
diff --git a/src/emx/src/ld/ld.c b/src/emx/src/ld/ld.c
index 9fb570c..17002c4 100644
--- a/src/emx/src/ld/ld.c
+++ b/src/emx/src/ld/ld.c
@@ -700,6 +700,7 @@ int reloc_flag = 0;
 int dll_flag = 0;
 int exe_flag = 0;
 int map_flag = 0;
+int sym_flag = 0;
 int stack_size = 0;
 int emxbind_strip = 0;
 enum exe_bind_type
@@ -1086,6 +1087,7 @@ static struct option longopts[] =
   {"Zrsx32", 0, 0, 141},        /* Create Win32/DOS win32 base */
   {"Zemx32", 0, 0, 142},        /* Create Win32/DOS emx base */
   {"Zdll", 0, 0, 143},          /* Create .dll file */
+  {"Zsym", 0, 0, 144},          /* Create .sym file */
   {"S", 0, 0, 'S'},
   {"T", 1, 0, 'T'},
   {"Ttext", 1, 0, 'T'},
@@ -1290,6 +1292,10 @@ decode_command (argc, argv)
           dll_flag = 1;
           break;
 
+        case 144:               /* -Zsym */
+          sym_flag = 1;
+          break;
+
         case 'R':
 	  reloc_flag = 1;
 	  break;
@@ -4004,6 +4010,14 @@ write_output (void)
           strcat (nargv[i], map_filename);
 	  i++;
 	}
+      if (sym_flag)
+	{
+	  if (!map_flag)
+	    fatal ("%s", "-Zsym without -Zmap.");
+	  freeav[j++] = nargv[i] = ALLOCA (3);
+	  strcpy (nargv[i], "-y");
+	  i++;
+	}
       if (res_filename != NULL)
 	{
 	  freeav[j++] = nargv[i] = ALLOCA (strlen (res_filename) + 3);
-- 
2.50.1