+if ($option_all) {
+ $harden_pie = 1;
+ $harden_bindnow = 1;
+}
+
+# Final exit code.
+my $exit = 0;
+
+# Input lines, contain only the lines with compiler commands.
+my @input = ();
+
+my $start = 0;
+my $continuation = 0;
+my $complete_line = undef;
+while (my $line = <>) {
+ # We skip over unimportant lines at the beginning to prevent false
+ # positives.
+ $start = 1 if $line =~ /^dpkg-buildpackage:/;
+ next if not $start;
+
+ # Detect architecture automatically unless overridden.
+ if (not $option_arch
+ and $line =~ /^dpkg-buildpackage: host architecture (.+)$/) {
+ $option_arch = $1;
+ }
+
+ # Ignore compiler warnings for now.
+ next if $line =~ /$warning_regex/;
+
+ # Remove all ANSI color sequences which are sometimes used in non-verbose
+ # builds.
+ $line = Term::ANSIColor::colorstrip($line);
+ # Also strip '\0xf' (delete previous character), used by Elink's build
+ # system.
+ $line =~ s/\x0f//g;
+ # And "ESC(B" which seems to be used on armhf and hurd (not sure what it
+ # does).
+ $line =~ s/\033\(B//g;
+
+ # Check if this line indicates a non verbose build.
+ my $non_verbose = is_non_verbose_build($line);
+
+ # One line may contain multiple commands (";"). Treat each one as single
+ # line.
+ my @line = split /(?<!\\);/, $line;
+ foreach $line (@line) {
+ # Add newline, drop all other whitespace at the end of a line.
+ $line =~ s/\s+$//;
+ $line .= "\n";
+
+ if ($continuation) {
+ $continuation = 0;
+
+ # Join lines, but leave the "\" in place so it's clear where the
+ # original line break was.
+ chomp $complete_line;
+ $complete_line .= ' ' . $line;
+ }
+ # Line continuation, line ends with "\".
+ if ($line =~ /\\\s*$/) {
+ $continuation = 1;
+ # Start line continuation.
+ if (not defined $complete_line) {
+ $complete_line = $line;
+ }
+ next;
+ }
+
+ if (not $continuation) {
+ # Use the complete line if a line continuation occurred.
+ if (defined $complete_line) {
+ $line = $complete_line;
+ $complete_line = undef;
+ }
+
+ # Ignore lines with no compiler commands.
+ next if $line !~ /\b$cc_regex(?:\s|\\)/ and not $non_verbose;
+
+ # Ignore false positives.
+ #
+ # `./configure` output.
+ next if not $non_verbose and $line =~ /^checking /;
+ next if $line =~ /^\s*(?:C\s+)?
+ (?:C|c)ompiler[\s.]*:\s+
+ $cc_regex
+ (?:\s-std=[a-z0-9:+]+)?\s*$
+ /x
+ or $line =~ /^\s*(?:- )?(?:CC|CXX)\s*=\s*$cc_regex\s*$/
+ or $line =~ /^\s*-- Check for working (?:C|CXX) compiler: /
+ or $line =~ /^\s*(?:echo )?Using [A-Z_]+\s*=\s*/;
+ # Debian buildd output.
+ next if $line =~ /^\s*Depends: .*?$cc_regex.*?$/
+ and $line !~ /\s-./; # option, prevent false negatives
+
+
+ push @input, $line;
+ }
+ }
+}
+
+if (scalar @input == 0) {
+ print "No compiler commands!\n";
+ $exit |= 1;
+ exit $exit;
+}
+
+# Option or auto detected.
+if ($option_arch) {
+ # The following was partially copied from dpkg-dev 1.16.1.2
+ # (/usr/share/perl5/Dpkg/Vendor/Debian.pm, add_hardening_flags()),
+ # copyright Raphaƫl Hertzog <hertzog@debian.org>, Kees Cook
+ # <kees@debian.org>, Canonical, Ltd. licensed under GPL version 2 or
+ # later. Keep it in sync.
+
+ require Dpkg::Arch;
+ my ($abi, $os, $cpu) = Dpkg::Arch::debarch_to_debtriplet($option_arch);
+
+ # Disable unsupported hardening options.
+ if ($cpu =~ /^(ia64|alpha|mips|mipsel|hppa)$/ or $option_arch eq 'arm') {
+ $harden_stack = 0;
+ }
+ if ($cpu =~ /^(ia64|hppa|avr32)$/) {
+ $harden_relro = 0;
+ $harden_bindnow = 0;
+ }
+}
+
+# Check if additional hardening options were used. Used to ensure they are
+# used for the complete build.
+foreach my $line (@input) {
+ $harden_pie = 1 if any_flags_used($line, @cflags_pie, @ldflags_pie);
+ $harden_bindnow = 1 if any_flags_used($line, @ldflags_bindnow);
+}
+
+# Check the specified hardening options, same order as dpkg-buildflags.
+if ($harden_pie) {
+ @cflags = (@cflags, @cflags_pie);
+ @ldflags = (@ldflags, @ldflags_pie);
+}
+if ($harden_stack) {
+ @cflags = (@cflags, @cflags_stack);
+}
+if ($harden_fortify) {
+ @cflags = (@cflags, @cflags_fortify);
+ @cppflags = (@cppflags, @cppflags_fortify);
+}
+if ($harden_format) {
+ @cflags = (@cflags, @cflags_format);
+}
+if ($harden_relro) {
+ @ldflags = (@ldflags, @ldflags_relro);
+}
+if ($harden_bindnow) {
+ @ldflags = (@ldflags, @ldflags_bindnow);
+}
+
+for (my $i = 0; $i < scalar @input; $i++) {
+ my $line = $input[$i];
+
+ my $skip = 0;
+ if (is_non_verbose_build($line, $input[$i + 1], \$skip)) {
+ error_non_verbose_build($line);
+ $exit |= 1 << 2;
+ next;
+ }
+ # Even if it's a verbose build, we might have to skip this line.
+ next if $skip;
+
+
+ # Is this a compiler or linker command?
+ my $compiler = 1;
+ my $linker = 0;
+
+ # Linker commands.
+ if ($line =~ m{\s-o # -o
+ [\s\\]*\s+ # possible line continuation
+ (?:[/.A-Za-z0-9~_-]+/)? # path to file
+ [A-Za-z0-9~_-]+ # binary name (no dots!)
+ (?:[0-9.]*\.so[0-9.]*[a-z]? # library (including version)
+ |\.la
+ |\.cgi)? # CGI binary
+ (?:\s|\\|$) # end of file name
+ }x
+ or $line =~ /^libtool: link: /
+ or $line =~ m{\s*/bin/bash .+?libtool\s+(.+?\s+)?--mode=(re)?link}) {
+ $compiler = 0;
+ $linker = 1;
+ }
+
+ # If there are source files then it's compiling/linking in one step and we
+ # must check both.
+ if ($line =~ /\.(?:c|cc|cpp)\b/) {
+ $compiler = 1;
+ }
+
+ # Check hardening flags.
+ my @missing;
+ if ($compiler and not all_flags_used($line, \@missing, @cflags)
+ # Libraries linked with -fPIC don't have to (and can't) be linked
+ # with -fPIE as well. It's no error if only PIE flags are missing.
+ and not pic_pie_conflict($line, $harden_pie, \@missing, @cflags_pie)) {
+ error_flags('CFLAGS missing', \@missing, \%flag_renames, $line);
+ $exit |= 1 << 3;
+ }
+ if ($compiler and not all_flags_used($line, \@missing, @cppflags)) {
+ error_flags('CPPFLAGS missing', \@missing, \%flag_renames, $line);
+ $exit |= 1 << 3;
+ }
+ if ($linker and not all_flags_used($line, \@missing, @ldflags)
+ # Same here, -fPIC conflicts with -fPIE.
+ and not pic_pie_conflict($line, $harden_pie, \@missing, @ldflags_pie)) {
+ error_flags('LDFLAGS missing', \@missing, \%flag_renames, $line);
+ $exit |= 1 << 3;
+ }
+}
+
+exit $exit;
+