Patch specinvoke to report execve failure

pkgs/spec-cpu/specinvoke-execve.patch

@@ -0,0 +1,15 @@
+--- a/unix.c	2024-10-08 12:30:18.785111397 +0200
++++ b/unix.c	2024-10-08 12:32:09.580923368 +0200
+@@ -165,7 +165,11 @@ pid_t invoke(copy_info_t *ui, command_in
+         /* We could redirect them here.  This might be useful for VMS? */
+         *(si->command_ptr) = cmd;
+         si->invoke_args[0] = si->shell;
+-        execve(si->shell, si->invoke_args, env);
++        if (execve(si->shell, si->invoke_args, env) != 0) {
++            fprintf (stderr, "Can't execute command: %s(%d)\n",
++                    STRERROR(errno), errno);
++            specinvoke_exit (1, si);
++        }
+     } else { /* Parent */
+         ui->pid = pid;
+         fprintf (si->outfp,

pkgs/spec-cpu/specinvoke.nix

@@ -20,6 +20,9 @@ in stdenv.mkDerivation {
   version = version;
   src = tar;
   sourceRoot = "tools/src/specinvoke/";
+  patches = [
+    ./specinvoke-execve.patch
+  ];
   # Almost no bugs
   preInstall = ''
     mkdir -p $out/bin