Added submodule contents into tree

externals/mbedtls/scripts/generate_features.pl

@@ -0,0 +1,79 @@
+#!/usr/bin/env perl
+#
+# Copyright The Mbed TLS Contributors
+# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+
+use strict;
+
+my ($include_dir, $data_dir, $feature_file);
+
+if( @ARGV ) {
+    die "Invalid number of arguments" if scalar @ARGV != 3;
+    ($include_dir, $data_dir, $feature_file) = @ARGV;
+
+    -d $include_dir or die "No such directory: $include_dir\n";
+    -d $data_dir or die "No such directory: $data_dir\n";
+} else {
+    $include_dir = 'include/mbedtls';
+    $data_dir = 'scripts/data_files';
+    $feature_file = 'library/version_features.c';
+
+    unless( -d $include_dir && -d $data_dir ) {
+        chdir '..' or die;
+        -d $include_dir && -d $data_dir
+            or die "Without arguments, must be run from root or scripts\n"
+    }
+}
+
+my $feature_format_file = $data_dir.'/version_features.fmt';
+
+my @sections = ( "System support", "Mbed TLS modules",
+                 "Mbed TLS feature support" );
+
+my $line_separator = $/;
+undef $/;
+
+open(FORMAT_FILE, '<:crlf', "$feature_format_file") or die "Opening feature format file '$feature_format_file': $!";
+my $feature_format = <FORMAT_FILE>;
+close(FORMAT_FILE);
+
+$/ = $line_separator;
+
+open(CONFIG_H, '<:crlf', "$include_dir/mbedtls_config.h") || die("Failure when opening mbedtls_config.h: $!");
+
+my $feature_defines = "";
+my $in_section = 0;
+
+while (my $line = <CONFIG_H>)
+{
+    next if ($in_section && $line !~ /#define/ && $line !~ /SECTION/);
+    next if (!$in_section && $line !~ /SECTION/);
+
+    if ($in_section) {
+        if ($line =~ /SECTION/) {
+            $in_section = 0;
+            next;
+        }
+        # Strip leading MBEDTLS_ to save binary size
+        my ($mbedtls_prefix, $define) = $line =~ /#define (MBEDTLS_)?(\w+)/;
+        if (!$mbedtls_prefix) {
+            die "Feature does not start with 'MBEDTLS_': $line\n";
+        }
+        $feature_defines .= "#if defined(MBEDTLS_${define})\n";
+        $feature_defines .= "    \"${define}\", //no-check-names\n";
+        $feature_defines .= "#endif /* MBEDTLS_${define} */\n";
+    }
+
+    if (!$in_section) {
+        my ($section_name) = $line =~ /SECTION: ([\w ]+)/;
+        my $found_section = grep $_ eq $section_name, @sections;
+
+        $in_section = 1 if ($found_section);
+    }
+};
+
+$feature_format =~ s/FEATURE_DEFINES\n/$feature_defines/g;
+
+open(ERROR_FILE, ">$feature_file") or die "Opening destination file '$feature_file': $!";
+print ERROR_FILE $feature_format;
+close(ERROR_FILE);