kc3-lang/libffi

diff --git a/configure.host b/configure.host
index b5e1ec7..34e83f7 100644
--- a/configure.host
+++ b/configure.host
@@ -106,10 +106,18 @@ case "${host}" in
 	if test $ac_cv_sizeof_size_t = 4; then
 	  case "$host" in
 	    x86_64-*x32|x86_64-x32-*)
+	      TARGET_X32=yes
 	      TARGET=X86_64
 	      ;;
 	    *)
-	      TARGET=X86
+	      echo 'int foo (void) { return __x86_64__; }' > conftest.c
+	      if $CC $CFLAGS -Werror -S conftest.c -o conftest.s > /dev/null 2>&1; then
+		TARGET_X32=yes
+		TARGET=X86_64
+	      else
+		TARGET=X86;
+	      fi
+	      rm -f conftest.*
 	      ;;
           esac
 	else
@@ -255,7 +263,11 @@ case "${TARGET}" in
 	SOURCES="ffi.c sysv.S"
 	;;
   X86_64)
-	SOURCES="ffi64.c unix64.S ffiw64.c win64.S"
+	if test x"$TARGET_X32" = xyes; then
+		SOURCES="ffi64.c unix64.S"
+	else
+		SOURCES="ffi64.c unix64.S ffiw64.c win64.S"
+	fi
 	;;
   X86_WIN64)
 	if test "$MSVC" = 1; then
diff --git a/src/x86/ffi64.c b/src/x86/ffi64.c
index 757930b..d5ec8b7 100644
--- a/src/x86/ffi64.c
+++ b/src/x86/ffi64.c
@@ -389,8 +389,10 @@ examine_argument (ffi_type *type, enum x86_64_reg_class classes[MAX_CLASSES],
 
 /* Perform machine dependent cif processing.  */
 
+#ifndef __ILP32__
 extern ffi_status
 ffi_prep_cif_machdep_efi64(ffi_cif *cif);
+#endif
 
 ffi_status
 ffi_prep_cif_machdep (ffi_cif *cif)
@@ -400,8 +402,10 @@ ffi_prep_cif_machdep (ffi_cif *cif)
   size_t bytes, n, rtype_size;
   ffi_type *rtype;
 
+#ifndef __ILP32__
   if (cif->abi == FFI_EFI64)
     return ffi_prep_cif_machdep_efi64(cif);
+#endif
   if (cif->abi != FFI_UNIX64)
     return FFI_BAD_ABI;
 
@@ -663,27 +667,35 @@ ffi_call_int (ffi_cif *cif, void (*fn)(void), void *rvalue,
 		   flags, rvalue, fn);
 }
 
+#ifndef __ILP32__
 extern void
 ffi_call_efi64(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue);
+#endif
 
 void
 ffi_call (ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
 {
+#ifndef __ILP32__
   if (cif->abi == FFI_EFI64)
     return ffi_call_efi64(cif, fn, rvalue, avalue);
+#endif
   ffi_call_int (cif, fn, rvalue, avalue, NULL);
 }
 
+#ifndef __ILP32__
 extern void
 ffi_call_go_efi64(ffi_cif *cif, void (*fn)(void), void *rvalue,
 		  void **avalue, void *closure);
+#endif
 
 void
 ffi_call_go (ffi_cif *cif, void (*fn)(void), void *rvalue,
 	     void **avalue, void *closure)
 {
+#ifndef __ILP32__
   if (cif->abi == FFI_EFI64)
     ffi_call_go_efi64(cif, fn, rvalue, avalue, closure);
+#endif
   ffi_call_int (cif, fn, rvalue, avalue, closure);
 }
 
@@ -691,12 +703,14 @@ ffi_call_go (ffi_cif *cif, void (*fn)(void), void *rvalue,
 extern void ffi_closure_unix64(void) FFI_HIDDEN;
 extern void ffi_closure_unix64_sse(void) FFI_HIDDEN;
 
+#ifndef __ILP32__
 extern ffi_status
 ffi_prep_closure_loc_efi64(ffi_closure* closure,
 			   ffi_cif* cif,
 			   void (*fun)(ffi_cif*, void*, void**, void*),
 			   void *user_data,
 			   void *codeloc);
+#endif
 
 ffi_status
 ffi_prep_closure_loc (ffi_closure* closure,
@@ -716,8 +730,10 @@ ffi_prep_closure_loc (ffi_closure* closure,
   void (*dest)(void);
   char *tramp = closure->tramp;
 
+#ifndef __ILP32__
   if (cif->abi == FFI_EFI64)
     return ffi_prep_closure_loc_efi64(closure, cif, fun, user_data, codeloc);
+#endif
   if (cif->abi != FFI_UNIX64)
     return FFI_BAD_ABI;
 
@@ -832,16 +848,20 @@ ffi_closure_unix64_inner(ffi_cif *cif,
 extern void ffi_go_closure_unix64(void) FFI_HIDDEN;
 extern void ffi_go_closure_unix64_sse(void) FFI_HIDDEN;
 
+#ifndef __ILP32__
 extern ffi_status
 ffi_prep_go_closure_efi64(ffi_go_closure* closure, ffi_cif* cif,
 			  void (*fun)(ffi_cif*, void*, void**, void*));
+#endif
 
 ffi_status
 ffi_prep_go_closure (ffi_go_closure* closure, ffi_cif* cif,
 		     void (*fun)(ffi_cif*, void*, void**, void*))
 {
+#ifndef __ILP32__
   if (cif->abi == FFI_EFI64)
     return ffi_prep_go_closure_efi64(closure, cif, fun);
+#endif
   if (cif->abi != FFI_UNIX64)
     return FFI_BAD_ABI;
 
diff --git a/testsuite/lib/libffi.exp b/testsuite/lib/libffi.exp
index 37e4cf6..7c65f81 100644
--- a/testsuite/lib/libffi.exp
+++ b/testsuite/lib/libffi.exp
@@ -324,7 +324,8 @@ proc run-many-tests { testcases extra_flags } {
                 "-DABI_NUM=FFI_THISCALL -DABI_ATTR=__THISCALL__"
                 "-DABI_NUM=FFI_FASTCALL -DABI_ATTR=__FASTCALL__"
             }
-        } elseif [istarget "x86_64-*-*"] {
+        } elseif { [istarget "x86_64-*-*"] \
+		   && [libffi_feature_test "#ifndef __ILP32__"] } {
             set targetabis {
                 ""
                 "-DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__"