cross/avr-gcc: Update to 13.2.0

Patch for NetBSD support removed (does no longer apply, it seems that it
is no longer required).
Patch for Darwin/aarch64 removed (as requested in patch comment by tnn@).
Patches for build system added (nonportable "==" shell syntax).
Patch for libgcc added (system header file "sys/mman.h" not found).
Disable PKGSRC_MKPIE (build failed on AMD64).
Needs a C++11 compiler for bootstrap.

Upstream changelog2:
<https://gcc.gnu.org/gcc-13/changes.html>
<https://gcc.gnu.org/gcc-12/changes.html>
<https://gcc.gnu.org/gcc-11/changes.html>


(micha)

$NetBSD: patch-gcc_config_nvptx_gen-opt.sh,v 1.1 2024/04/26 13:05:01 micha Exp $

Fix nonportable syntax in "[" command.
<https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105831>

--- gcc/config/nvptx/gen-opt.sh.orig	2022-05-06 07:30:57.000000000 +0000
+++ gcc/config/nvptx/gen-opt.sh
@@ -56,7 +56,7 @@ EnumValue
 Enum(ptx_isa) String(sm_$sm) Value(PTX_ISA_SM$sm)
 EOF
 
-    if [ "$sm" == "$last" ]; then
+    if [ "$sm" = "$last" ]; then
 	# Don't end with trailing empty line.
 	continue
     fi

$NetBSD: patch-libgcc_libgcov.h,v 1.1 2024/04/26 13:05:01 micha Exp $

System include directory is not searched, even if "sys/mman.h" header
file is present. Quoted from "libgcc/configure.ac":
| The libgcc should not depend on any header files
=> Redefine HAVE_SYS_MMAN_H to zero.

--- libgcc/libgcov.h.orig	2022-05-06 07:30:59.000000000 +0000
+++ libgcc/libgcov.h
@@ -45,6 +45,12 @@
 #include "libgcc_tm.h"
 #include "gcov.h"
 
+// ----------------------------------
+// pkgsrc patch
+#undef HAVE_SYS_MMAN_H
+#define HAVE_SYS_MMAN_H  0
+// ----------------------------------
+
 #if HAVE_SYS_MMAN_H
 #include <sys/mman.h>
 #endif