Delete x86 architecture check (#2381)

* delete

* fix build

Author: TheNumbat

backend/amd64/arch.ml

@@ -105,11 +105,7 @@ let command_line_options =
     "-ftrap-notes", Arg.Set trap_notes,
       " Emit .note.ocaml_eh section with trap handling information (default)";
     "-fno-trap-notes", Arg.Clear trap_notes,
-      " Do not emit .note.ocaml_eh section with trap handling information";
-    "-farch-check", Arg.Set arch_check_symbols,
-      " Emit ISA extension symbols for CPUID check (default)";
-    "-fno-arch-check", Arg.Clear arch_check_symbols,
-      " Do not emit ISA extension symbols for CPUID check";
+      " Do not emit .note.ocaml_eh section with trap handling information"
   ] @ Extension.args
 
 let assert_simd_enabled () =

backend/amd64/emit.mlp

@@ -922,29 +922,6 @@ let emit_push_trap_label handler =
   traps.push_traps <- lbl::traps.push_traps;
   traps.enter_traps <- Int.Set.add handler traps.enter_traps
 
-(* ISA Extension Checking *)
-
-module Extension = struct
-  module E = Arch.Extension
-
-  (* Keep in sync with [isa.c] in the runtime. *)
-  let symbol : E.t -> string =
-    fun t -> "caml_arch_" ^ String.lowercase_ascii (E.name t)
-
-  let is_nasm_or_masm () =
-    match system with
-    | S_macosx | S_win32 | S_win64 -> true
-    | _ -> false
-
-  let emit_symbols () =
-    if !arch_check_symbols && not (is_nasm_or_masm ()) then
-    List.iter (fun ext ->
-      let name = symbol ext in
-      D.label name;
-      D.weak name
-    ) (E.available ())
-end
-
 (* Emit Code *)
 
 let emit_atomic instr op (size : Cmm.atomic_bitwidth) addr =
@@ -2011,7 +1988,6 @@ let begin_assembly unix =
 
   D.data ();
   emit_global_label "data_begin";
-  Extension.emit_symbols ();
 
   emit_named_text_section code_begin;
   emit_global_label_for_symbol code_begin;

ocaml/Makefile

@@ -634,7 +634,6 @@ runtime4_COMMON_C_SOURCES = \
   interp \
   ints \
   io \
-  isa \
   lexing \
   main \
   major_gc \
@@ -674,8 +673,7 @@ runtime4_NATIVE_ONLY_C_SOURCES = \
   fail_nat \
   roots_nat \
   startup_nat \
-  signals_nat \
-  isa
+  signals_nat
 
 # Runtime system source files (v5)
 
@@ -704,7 +702,6 @@ runtime_COMMON_C_SOURCES = \
   intern \
   ints \
   io \
-  isa \
   lexing \
   lf_skiplist \
   main \
@@ -747,8 +744,7 @@ runtime_NATIVE_ONLY_C_SOURCES = \
   fail_nat \
   frame_descriptors \
   startup_nat \
-  signals_nat \
-  isa
+  signals_nat
 
 # The runtime system
 

ocaml/runtime/caml/dune

@@ -65,7 +65,6 @@
     (interp.h as caml/interp.h)
     (intext.h as caml/intext.h)
     (io.h as caml/io.h)
-    (isa.h as caml/isa.h)
     (lf_skiplist.h as caml/lf_skiplist.h)
     (m.h as caml/m.h)
     (major_gc.h as caml/major_gc.h)

ocaml/runtime/caml/isa.h

@@ -18,7 +18,6 @@
 
 #include "config.h"
 #include "misc.h"
-#include "isa.h"
 
 #ifdef __cplusplus
 extern "C" {

ocaml/runtime/caml/mlvalues.h

@@ -21,7 +21,6 @@
    and native code. */
 
 #include <stdio.h>
-#include "caml/isa.h"
 #include "caml/backtrace.h"
 #include "caml/memory.h"
 #include "caml/callback.h"
@@ -115,7 +114,6 @@ void caml_parse_ocamlrunparam(void)
       case 'v': scanmult (opt, (uintnat *)&caml_verb_gc); break;
       case 'V': scanmult (opt, &params.verify_heap); break;
       case 'W': scanmult (opt, &caml_runtime_warnings); break;
-      case 'X': scanmult (opt, &caml_skip_arch_extension_check); break;
       case ',': continue;
       }
       while (*opt != '\0'){