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From: "Ozkan Sezer (sezeroz AT gmail DOT com) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
Date: Sun, 29 Jan 2023 15:45:58 +0300
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Subject: Re: [PATCH v3] dxe3gen: invoke ld/as via gcc
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Precedence: bulk

How about the following suggestion?

Index: dxe3gen.c
===================================================================
RCS file: /cvs/djgpp/djgpp/src/dxe/dxe3gen.c,v
retrieving revision 1.27
diff -u -p -r1.27 dxe3gen.c
--- dxe3gen.c	28 Jan 2023 14:10:03 -0000	1.27
+++ dxe3gen.c	29 Jan 2023 12:41:30 -0000
@@ -19,6 +19,7 @@
       otherwise the exit code of GNU ld is returned
 */

+#include <limits.h>
 #include <ctype.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -204,7 +205,7 @@
 #define IS_SLASH(path)          (((path) == '/') || ((path) == '\\'))
 #define IS_DIR_SEPARATOR(path)  (IS_SLASH(path) || ((path) == ':'))

-#define NUMBER_OF_LINKER_ARGS             10
+#define NUMBER_OF_LINKER_ARGS             12
 #define NUMBER_OF_ADDITIONAL_LOADED_LIBS  0

 #define IS_VALID_CIE(id)        ((id) == 0)
@@ -465,6 +466,25 @@ static void process_env(void)
 }


+static char libgcc_dir[PATH_MAX];
+static void read_libgccdir(void)
+{
+    char *ptr;
+    FILE *p;
+
+    sprintf(libgcc_dir, "%s -print-libgcc-file-name", dxe_cc);
+    p = popen(libgcc_dir,"r");
+    memset(libgcc_dir, 0, sizeof(libgcc_dir));
+    if (!p) return;
+    while (fread(libgcc_dir, 1, sizeof(libgcc_dir), p) > 0) {
+        /**/;
+    }
+    pclose(p);
+    ptr = strrchr(libgcc_dir, '\\');
+    if (!ptr) ptr = strrchr(libgcc_dir, '/');
+    if (ptr) *ptr = '\0';
+}
+
 /* Desc: process command line args
  *
  * In  : no of arguments, argument list, ptr to store linker args
@@ -481,6 +501,12 @@ static void process_args(int argc, char
     fprintf(stderr, "Error: neither DXE_LD_LIBRARY_PATH nor DJDIR are
set in environment\n");
     exit(1);
   }
+  read_libgccdir();
+  if (!libgcc_dir[0])
+  {
+    fprintf(stderr, "Error: failed determining libgcc directory\n");
+    exit(1);
+  }

   new_argv[0] = dxe_ld;
   new_argv[1] = "-X";
@@ -490,8 +516,10 @@ static void process_args(int argc, char
   new_argv[5] = TEMP_O_FILE;
   new_argv[6] = "-L";
   new_argv[7] = libdir;
-  new_argv[8] = "-T";
-  new_argv[9] = dxe_sc;
+  new_argv[8] = "-L";
+  new_argv[9] = libgcc_dir;
+  new_argv[10] = "-T";
+  new_argv[11] = dxe_sc;

   if (!strcmp(base_name(argv[0]), "dxegen"))
     /* invoked as `dxegen' */