3 # Build log hardening check, checks build logs for missing hardening flags.
5 # Copyright (C) 2012-2018 Simon Ruderich
7 # This program is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
25 use Text::ParseWords ();
27 our $VERSION = '0.08';
32 # Regex to catch compiler commands.
34 (?<!\s-) # ignore options, e.g. "-c++" [sic!] (used by swig)
35 (?<!\.) # ignore file names, e.g. "test.gcc"
36 (?:cc|gcc|g\+\+|c\+\+|gfortran|mpicc|mpicxx|mpifort)
37 (?:-[\d.]+)? # version suffix, e.g. "gcc-4.6"
39 # Full regex which matches the complete compiler name. Used in a few places to
40 # prevent false negatives.
41 my $cc_regex_full_prefix = qr/
42 [a-z0-9_]+-(?:linux-|kfreebsd-)?gnu(?:eabi|eabihf)?
44 my $cc_regex_full = qr/
45 (?:$cc_regex_full_prefix-)?
48 # Regex to check if a line contains a compiler command.
49 my $cc_regex_normal = qr/
52 # Regex to catch (GCC) compiler warnings.
53 my $warning_regex = qr/^(.+?):(\d+):\d+: warning: (.+?) \[(.+?)\]$/;
54 # Regex to catch libtool commands and not lines which show commands executed
55 # by libtool (e.g. libtool: link: ...).
56 my $libtool_regex = qr/\blibtool\s.*--mode=/;
57 my $libtool_link_regex = qr/\blibtool: link: /;
59 # List of source file extensions which require preprocessing.
60 my @source_preprocess_compile_cpp = (
62 qw( cc cp cxx cpp CPP c++ C ),
66 my @source_preprocess_compile_fortran = (
68 qw( F FOR fpp FPP FTN F90 F95 F03 F08 ),
70 my @source_preprocess_compile = (
76 @source_preprocess_compile_cpp,
78 @source_preprocess_compile_fortran,
80 my @source_preprocess_no_compile = (
84 my @source_preprocess = (
85 @source_preprocess_compile,
86 @source_preprocess_no_compile,
88 # List of source file extensions which don't require preprocessing.
89 my @source_no_preprocess_compile_cpp = (
95 my @source_no_preprocess_compile_ada = (
101 my @source_no_preprocess_compile_fortran = (
103 qw( f for ftn f90 f95 f03 f08 ),
105 my @source_no_preprocess_compile = (
109 @source_no_preprocess_compile_cpp,
113 @source_no_preprocess_compile_fortran,
115 @source_no_preprocess_compile_ada,
117 my @source_no_preprocess_no_compile_ada = (
121 my @source_no_preprocess_no_compile = (
125 @source_no_preprocess_no_compile_ada,
127 my @source_no_preprocess = (
128 @source_no_preprocess_compile,
129 @source_no_preprocess_no_compile,
131 # List of header file extensions which require preprocessing.
132 my @header_preprocess = (
133 # C, C++, Objective-C, Objective-C++
136 qw( hh H hp hxx hpp HPP h++ tcc ),
140 # Normal object files.
142 # Libtool object files.
144 # Dynamic libraries. bzip2 uses .sho.
150 # Hashes for fast extensions lookup to check if a file falls in one of these
152 my %extensions_no_preprocess = map { $_ => 1 } (
153 # There's no @header_no_preprocess.
154 @source_no_preprocess,
156 my %extensions_preprocess = map { $_ => 1 } (
160 my %extensions_compile_link = map { $_ => 1 } (
162 @source_no_preprocess,
164 my %extensions_compile = map { $_ => 1 } (
165 @source_preprocess_compile,
166 @source_no_preprocess_compile,
168 my %extensions_no_compile = map { $_ => 1 } (
169 @source_preprocess_no_compile,
170 @source_no_preprocess_no_compile,
172 my %extensions_compile_cpp = map { $_ => 1 } (
173 @source_preprocess_compile_cpp,
174 @source_no_preprocess_compile_cpp,
176 my %extensions_ada = map { $_ => 1 } (
177 @source_no_preprocess_compile_ada,
178 @source_no_preprocess_no_compile_ada,
180 my %extensions_fortran = map { $_ => 1 } (
181 @source_no_preprocess_compile_fortran,
182 @source_preprocess_compile_fortran,
184 my %extensions_object = map { $_ => 1 } (
187 my %extension = map { $_ => 1 } (
188 @source_no_preprocess,
194 # Regexp to match file extensions.
195 my $file_extension_regex = qr/
197 \S+ # Filename without extension.
199 ([^\/\\.,;:\s]+)# File extension.
200 (?=\s|\\) # At end of word. Can't use \b because some files have non
201 # word characters at the end and because \b matches double
202 # extensions (like .cpp.o). Works always as all lines are
203 # terminated with "\n".
206 # Expected (hardening) flags. All flags are used as regexps (and compiled to
207 # real regexps below for better execution speed).
210 '-O(?:2|3)', # keep at index 1, search for @def_cflags_debug to change it
212 my @def_cflags_debug = (
213 # These flags indicate a debug build which disables checks for -O2.
217 my @def_cflags_format = (
218 '-Wformat(?:=2)?', # -Wformat=2 implies -Wformat, accept it too
219 '-Werror=format-security', # implies -Wformat-security
221 my @def_cflags_fortify = (
222 # fortify needs at least -O1, but -O2 is recommended anyway
224 my @def_cflags_stack = (
225 '-fstack-protector', # keep first, used by cflags_stack_broken()
226 '--param[= ]ssp-buffer-size=4',
228 my @def_cflags_stack_strong = (
229 '-fstack-protector-strong', # keep first, used by cflags_stack_broken()
231 my @def_cflags_stack_bad = (
232 # Blacklist all stack protector options for simplicity.
233 '-fno-stack-protector',
234 '-fno-stack-protector-all',
235 '-fno-stack-protector-strong',
237 my @def_cflags_pie = (
243 # @def_cxxflags_* is the same as @def_cflags_*.
244 my @def_cppflags = ();
245 my @def_cppflags_fortify = (
246 '-D_FORTIFY_SOURCE=2', # must be first, see cppflags_fortify_broken()
247 # If you add another flag fix hack below (search for "Hack to fix") and
248 # $def_cppflags_fortify[0].
250 my @def_cppflags_fortify_bad = (
251 # These flags may overwrite -D_FORTIFY_SOURCE=2.
253 '-D_FORTIFY_SOURCE=0',
254 '-D_FORTIFY_SOURCE=1',
256 my @def_ldflags = ();
257 my @def_ldflags_relro = (
260 my @def_ldflags_bindnow = (
263 my @def_ldflags_pie = (
267 my @def_ldflags_pic = (
272 # References to all flags checked by the flag checker.
276 \@def_cflags_fortify,
278 \@def_cflags_stack_strong,
279 \@def_cflags_stack_bad,
283 \@def_cppflags_fortify,
286 \@def_ldflags_bindnow,
289 # References to all used flags.
290 my @flag_refs_all = (
293 \@def_cppflags_fortify_bad,
296 # Renaming rules for the output so the regex parts are not visible. Also
297 # stores string values of flag regexps above, see compile_flag_regexp().
299 '-O(?:2|3)' => '-O2',
300 '-Wformat(?:=2)?' => '-Wformat',
301 '--param[= ]ssp-buffer-size=4' => '--param=ssp-buffer-size=4',
302 '-Wl,(?:-z,)?relro' => '-Wl,-z,relro',
303 '-Wl,(?:-z,)?now' => '-Wl,-z,now',
307 no_compiler_commands => 1 << 0,
308 # used by POD::Usage => 1 << 1,
309 non_verbose_build => 1 << 2,
310 flags_missing => 1 << 3,
311 hardening_wrapper => 1 << 4,
312 invalid_cmake => 1 << 5,
316 no_compiler_commands => 'I-no-compiler-commands',
317 non_verbose_build => 'W-compiler-flags-hidden',
318 flags_missing => 'W-dpkg-buildflags-missing',
319 hardening_wrapper => 'I-hardening-wrapper-used',
320 invalid_cmake => 'I-invalid-cmake-used',
323 # Statistics of missing flags and non-verbose build commands. Used for
327 preprocess_missing => 0,
329 compile_missing => 0,
331 compile_cpp_missing => 0,
335 commands_nonverbose => 0,
338 # Use colored (ANSI) output?
344 # Only works for single-level arrays with no undef values. Thanks to perlfaq4.
346 my ($first_ref, $second_ref) = @_;
348 return 0 if scalar @{$first_ref} != scalar @{$second_ref};
350 my $length = scalar @{$first_ref};
351 for (my $i = 0; $i < $length; $i++) {
352 return 0 if $first_ref->[$i] ne $second_ref->[$i];
359 my ($message, $missing_flags_ref, $flag_renames_ref, $line, $number) = @_;
361 # Get string value of qr//-escaped regexps and if requested rename them.
362 my @missing_flags = map {
363 $flag_renames_ref->{$_}
364 } @{$missing_flags_ref};
366 my $flags = join ' ', @missing_flags;
367 printf '%d:', $number if defined $number;
368 printf '%s (%s)%s %s',
369 error_color($message, 'red'), $flags, error_color(':', 'yellow'),
374 sub error_non_verbose_build {
375 my ($line, $number) = @_;
377 printf '%d:', $number if defined $number;
379 error_color('NONVERBOSE BUILD', 'red'),
380 error_color(':', 'yellow'),
385 sub error_invalid_cmake {
389 error_color('INVALID CMAKE', 'red'),
390 error_color(':', 'yellow'),
395 sub error_hardening_wrapper {
397 error_color('HARDENING WRAPPER', 'red'),
398 error_color(':', 'yellow'),
399 'no checks possible, aborting';
404 my ($message, $color) = @_;
407 return Term::ANSIColor::colored($message, $color);
414 my ($line, @flags) = @_;
416 foreach my $flag (@flags) {
417 return 1 if $line =~ /$flag/;
423 my ($line, $missing_flags_ref, @flags) = @_;
425 my @missing_flags = ();
426 foreach my $flag (@flags) {
427 if (not $line =~ /$flag/) {
428 push @missing_flags, $flag;
432 return 1 if scalar @missing_flags == 0;
434 @{$missing_flags_ref} = @missing_flags;
437 # Check if any of \@bad_flags occurs after $good_flag. Doesn't check if
438 # $good_flag is present.
439 sub flag_overwritten {
440 my ($line, $good_flag, $bad_flags) = @_;
442 if (not any_flags_used($line, @{$bad_flags})) {
447 foreach my $flag (@{$bad_flags}) {
448 while ($line =~ /$flag/g) {
449 if ($bad_pos < $+[0]) {
455 while ($line =~ /$good_flag/g) {
458 if ($good_pos > $bad_pos) {
464 sub cppflags_fortify_broken {
465 my ($line, $missing_flags) = @_;
467 # $def_cppflags_fortify[0] must be -D_FORTIFY_SOURCE=2!
468 my $fortify_source = $def_cppflags_fortify[0];
470 # Some build systems enable/disable fortify source multiple times, check
472 if (not flag_overwritten($line,
474 \@def_cppflags_fortify_bad)) {
477 push @{$missing_flags}, $fortify_source;
481 sub cflags_stack_broken {
482 my ($line, $missing_flags, $strong) = @_;
484 my $flag = $strong ? $def_cflags_stack_strong[0]
485 : $def_cflags_stack[0];
487 if (not flag_overwritten($line, $flag, \@def_cflags_stack_bad)) {
490 push @{$missing_flags}, $flag;
494 # Modifies $missing_flags_ref array.
495 sub pic_pie_conflict {
496 my ($line, $pie, $missing_flags_ref, @flags_pie) = @_;
498 return 0 if not $pie;
499 return 0 if not any_flags_used($line, @def_ldflags_pic);
501 my %flags = map { $_ => 1 } @flags_pie;
503 # Remove all PIE flags from @missing_flags as they are not required with
506 not exists $flags{$_}
507 } @{$missing_flags_ref};
508 @{$missing_flags_ref} = @result;
510 # We got a conflict when no flags are left, thus only PIE flags were
511 # missing. If other flags were missing abort because the conflict is not
513 return scalar @result == 0;
516 sub is_non_verbose_build {
517 my ($line, $skip_ref, $input_ref, $line_offset, $line_count) = @_;
519 if ($line =~ /$libtool_regex/o) {
520 # libtool's --silent hides the real compiler flags.
521 if ($line =~ /\s--silent/) {
523 # If --silent is not present, skip this line as some compiler flags
524 # might be missing (e.g. -fPIE) which are handled correctly by libtool
525 # internally. libtool displays the real compiler command on the next
526 # line, so the flags are checked as usual.
533 if (not (index($line, 'checking if you want to see long compiling messages... no') == 0
534 or $line =~ /^\s*\[?(?:CC|CCLD|C\+\+|CXX|CXXLD|LD|LINK)\]?\s+(.+?)$/
535 or $line =~ /^\s*[Cc]ompiling\s+(.+?)(?:\.\.\.)?$/
536 or $line =~ /^\s*[Bb]uilding (?:program|shared library)\s+(.+?)$/
537 or $line =~ /^\s*\[[\d ]+%\] Building (?:C|CXX) object (.+?)$/)) {
543 # C++ compiler setting.
544 return 0 if $line =~ /^\s*C\+\+.+?:\s+(?:yes|no)\s*$/;
545 return 0 if $line =~ /^\s*C\+\+ Library: stdc\+\+$/;
546 # "Compiling" non binary files.
547 return 0 if $line =~ /^\s*Compiling \S+\.(?:py|el)['"]?\s*(?:\.\.\.)?$/;
548 # "Compiling" with no file name.
549 if ($line =~ /^\s*[Cc]ompiling\s+(.+?)(?:\.\.\.)?$/) {
550 # $file_extension_regex may need spaces around the filename.
551 return 0 if not " $1 " =~ /$file_extension_regex/o;
556 # On the first pass we only check if this line is verbose or not.
557 return 1 if not defined $input_ref;
559 # Second pass, we have access to the next lines.
562 # CMake and other build systems print the non-verbose messages also when
563 # building verbose. If a compiler and the file name occurs in the next
564 # lines, treat it as verbose build.
566 # Get filename, we can't use the complete path as only parts of it are
567 # used in the real compiler command.
568 $file =~ m{/([^/\s]+)$};
571 for (my $i = 1; $i <= $line_count; $i++) {
572 my $next_line = $input_ref->[$line_offset + $i];
573 last unless defined $next_line;
575 if (index($next_line, $file) != -1 and $next_line =~ /$cc_regex/o) {
576 # Not a non-verbose line, but we still have to skip the
577 # current line as it doesn't contain any compiler commands.
587 # Remove @flags from $flag_refs_ref, uses $flag_renames_ref as reference.
589 my ($flag_refs_ref, $flag_renames_ref, @flags) = @_;
591 my %removes = map { $_ => 1 } @flags;
592 foreach my $flags (@{$flag_refs_ref}) {
594 # Flag found as string.
595 not exists $removes{$_}
596 # Flag found as string representation of regexp.
597 and (not defined $flag_renames_ref->{$_}
598 or not exists $removes{$flag_renames_ref->{$_}})
605 # Modifies $flag_renames_ref hash.
606 sub compile_flag_regexp {
607 my ($flag_renames_ref, @flags) = @_;
610 foreach my $flag (@flags) {
611 # Compile flag regexp for faster execution.
612 my $regex = qr/\s$flag(?:\s|\\)/;
614 # Store flag name in replacement string for correct flags in messages
615 # with qr//ed flag regexps.
616 $flag_renames_ref->{$regex}
617 = (exists $flag_renames_ref->{$flag})
618 ? $flag_renames_ref->{$flag}
621 push @result, $regex;
626 # Does any extension in @extensions exist in %{$extensions_ref}?
627 sub extension_found {
628 my ($extensions_ref, @extensions) = @_;
630 foreach my $extension (@extensions) {
631 if (exists $extensions_ref->{$extension}) {
641 # Parse command line arguments.
643 my $option_version = 0;
645 my $option_bindnow = 0;
646 my @option_ignore_arch = ();
647 my @option_ignore_flag = ();
648 my @option_ignore_arch_flag = ();
649 my @option_ignore_line = ();
650 my @option_ignore_arch_line = ();
652 my $option_arch = undef;
653 my $option_buildd = 0;
654 my $option_debian = 0;
656 my $option_line_numbers = 0;
657 if (not Getopt::Long::GetOptions(
658 'help|h|?' => \$option_help,
659 'version' => \$option_version,
661 'pie' => \$option_pie,
662 'bindnow' => \$option_bindnow,
663 'all' => \$option_all,
665 'ignore-arch=s' => \@option_ignore_arch,
666 'ignore-flag=s' => \@option_ignore_flag,
667 'ignore-arch-flag=s' => \@option_ignore_arch_flag,
668 'ignore-line=s' => \@option_ignore_line,
669 'ignore-arch-line=s' => \@option_ignore_arch_line,
671 'color' => \$option_color,
672 'arch=s' => \$option_arch,
673 'buildd' => \$option_buildd,
674 'debian' => \$option_debian,
675 'line-numbers' => \$option_line_numbers,
678 Pod::Usage::pod2usage(2);
682 Pod::Usage::pod2usage(1);
684 if ($option_version) {
686 blhc $VERSION Copyright (C) 2012-2018 Simon Ruderich
688 This program is free software: you can redistribute it and/or modify
689 it under the terms of the GNU General Public License as published by
690 the Free Software Foundation, either version 3 of the License, or
691 (at your option) any later version.
693 This program is distributed in the hope that it will be useful,
694 but WITHOUT ANY WARRANTY; without even the implied warranty of
695 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
696 GNU General Public License for more details.
698 You should have received a copy of the GNU General Public License
699 along with this program. If not, see <http://www.gnu.org/licenses/>.
705 if (scalar @ARGV == 0) {
707 Pod::Usage::pod2usage(2);
710 # Don't load Term::ANSIColor in buildd mode because Term::ANSIColor is not
711 # installed on Debian's buildds.
712 if (not $option_buildd) {
713 require Term::ANSIColor;
721 # Precompiled ignores for faster lookup.
722 my %option_ignore_arch_flag = ();
723 my %option_ignore_arch_line = ();
725 # Strip flags which should be ignored.
726 if (scalar @option_ignore_flag > 0) {
727 remove_flags(\@flag_refs, \%flag_renames, @option_ignore_flag);
729 # Same for arch specific ignore flags, but only prepare here.
730 if (scalar @option_ignore_arch_flag > 0) {
731 foreach my $ignore (@option_ignore_arch_flag) {
732 my ($ignore_arch, $ignore_flag) = split /:/, $ignore, 2;
734 if (not $ignore_arch or not $ignore_flag) {
735 printf STDERR 'Value "%s" invalid for option ignore-arch-flag '
736 . '("arch:flag" expected)' . "\n", $ignore;
738 Pod::Usage::pod2usage(2);
741 push @{$option_ignore_arch_flag{$ignore_arch}}, $ignore_flag;
745 # Precompile all flag regexps. any_flags_used(), all_flags_used() get a lot
747 foreach my $flags (@flag_refs_all) {
748 @{$flags} = compile_flag_regexp(\%flag_renames, @{$flags});
751 # Precompile ignore line regexps, also anchor at beginning and end of line.
752 foreach my $ignore (@option_ignore_line) {
753 $ignore = qr/^$ignore$/;
755 # Same for arch specific ignore lines.
756 if (scalar @option_ignore_arch_line > 0) {
757 foreach my $ignore (@option_ignore_arch_line) {
758 my ($ignore_arch, $ignore_line) = split /:/, $ignore, 2;
760 if (not $ignore_arch or not $ignore_line) {
761 printf STDERR 'Value "%s" invalid for option ignore-arch-line '
762 . '("arch:line" expected)' . "\n", $ignore;
764 Pod::Usage::pod2usage(2);
767 push @{$option_ignore_arch_line{$ignore_arch}}, qr/^$ignore_line$/;
775 foreach my $file (@ARGV) {
776 print "checking '$file'...\n" if scalar @ARGV > 1;
778 -f $file or die "No such file: $file";
780 open my $fh, '<', $file or die $!;
782 # Architecture of this file.
783 my $arch = $option_arch;
785 # Hardening options. Not all architectures support all hardening options.
786 my $harden_format = 1;
787 my $harden_fortify = 1;
788 my $harden_stack = 1;
789 my $harden_stack_strong = 1;
790 my $harden_relro = 1;
791 my $harden_bindnow = $option_bindnow; # defaults to 0
792 my $harden_pie = $option_pie; # defaults to 0
794 # Does this build log use ada? Ada also uses gcc as compiler but uses
795 # different CFLAGS. But only perform ada checks if an ada compiler is used
796 # for performance reasons.
798 # Fortran also requires different CFLAGS.
801 # Number of parallel jobs to prevent false positives when detecting
802 # non-verbose builds. As not all jobs declare the number of parallel jobs
803 # use a large enough default.
806 # Don't check for PIE flags if automatically applied by the compiler. Only
807 # used in buildd and Debian mode.
808 my $disable_harden_pie = 0;
809 if ($option_debian) {
810 $disable_harden_pie = 1;
814 while (my $line = <$fh>) {
817 # Detect architecture automatically unless overridden. For buildd logs
818 # only, doesn't use the dpkg-buildpackage header. Necessary to ignore
819 # build logs which aren't built (wrong architecture, build error,
822 if (index($line, 'Build Architecture: ') == 0) {
823 $arch = substr $line, 20, -1; # -1 to ignore '\n' at the end
824 # For old logs (sbuild << 0.63.0-1).
825 } elsif (index($line, 'Architecture: ') == 0) {
826 $arch = substr $line, 14, -1; # -1 to ignore '\n' at the end
830 # dpkg-buildflags only provides hardening flags since 1.16.1, don't
831 # check for hardening flags in buildd mode if an older dpkg-dev is
832 # used. Default flags (-g -O2) are still checked.
834 # Packages which were built before 1.16.1 but used their own hardening
835 # flags are not checked.
837 # Strong stack protector is used since dpkg 1.17.11.
839 # Recent GCC versions automatically use PIE (only on supported
840 # architectures) and dpkg respects this properly since 1.18.15 and
841 # doesn't pass PIE flags manually.
843 and index($line, 'Toolchain package versions: ') == 0) {
844 require Dpkg::Version;
847 my $disable_strong = 1;
849 if ($line =~ /\bdpkg-dev_(\S+)/) {
850 if (Dpkg::Version::version_compare($1, '1.16.1') >= 0) {
853 if (Dpkg::Version::version_compare($1, '1.17.11') >= 0) {
856 if (Dpkg::Version::version_compare($1, '1.18.15') >= 0) {
857 $disable_harden_pie = 1;
869 if ($disable_strong) {
870 $harden_stack_strong = 0;
874 # The following two versions of CMake in Debian obeyed CPPFLAGS, but
875 # this was later dropped because upstream rejected the patch. Thus
876 # build logs with these versions will have fortify hardening flags
877 # enabled, even though they may be not correctly set and are missing
878 # when build with later CMake versions. Thanks to Aron Xu for letting
880 if (index($line, 'Package versions: ') == 0
881 and $line =~ /\bcmake_(\S+)/
882 and ($1 eq '2.8.7-1' or $1 eq '2.8.7-2')) {
883 if (not $option_buildd) {
884 error_invalid_cmake($1);
885 $exit |= $exit_code{invalid_cmake};
887 print "$buildd_tag{invalid_cmake}|$1|\n";
891 # Debian's build daemons use "Filtered Build-Depends:" (or just
892 # "Build-Depends:" in older versions) for the build dependencies, but
893 # pbuilder uses "Depends:"; support both.
894 if (index($line, 'Filtered Build-Depends: ') == 0
895 or index($line, 'Build-Depends: ') == 0
896 or index($line, 'Depends: ') == 0) {
897 # If hardening wrapper is used (wraps calls to gcc and adds
898 # hardening flags automatically) we can't perform any checks,
900 if ($line =~ /\bhardening-wrapper\b/) {
901 if (not $option_buildd) {
902 error_hardening_wrapper();
903 $exit |= $exit_code{hardening_wrapper};
905 print "$buildd_tag{hardening_wrapper}||\n";
911 if ($line =~ /\bgnat\b/) {
915 if ($line =~ /\bgfortran\b/) {
920 # This flags is not always available, but if it is use it.
921 if ($line =~ /^DEB_BUILD_OPTIONS=.*\bparallel=(\d+)/) {
925 # We skip over unimportant lines at the beginning of the log to
926 # prevent false positives.
927 last if index($line, 'dpkg-buildpackage: ') == 0;
930 # Input lines, contain only the lines with compiler commands.
932 # Non-verbose lines in the input. Used to reduce calls to
933 # is_non_verbose_build() (which is quite slow) in the second loop when
934 # it's already clear if a line is non-verbose or not.
935 my @input_nonverbose = ();
937 my @input_number = ();
939 my $continuation = 0;
940 my $complete_line = undef;
942 while (my $line = <$fh>) {
945 # And stop at the end of the build log. Package details (reported by
946 # the buildd logs) are not important for us. This also prevents false
948 last if index($line, 'Build finished at ') == 0
949 and $line =~ /^Build finished at \d{8}-\d{4}$/;
951 if (not $continuation) {
955 # Detect architecture automatically unless overridden.
957 and index($line, 'dpkg-buildpackage: host architecture ') == 0) {
958 $arch = substr $line, 37, -1; # -1 to ignore '\n' at the end
960 # Old buildd logs use e.g. "host architecture is alpha", remove
961 # the "is", otherwise debarch_to_debtriplet() will not detect the
963 if (index($arch, 'is ') == 0) {
964 $arch = substr $arch, 3;
968 next if $line =~ /^\s*#/;
969 # Ignore compiler warnings for now.
970 next if $line =~ /$warning_regex/o;
972 if (not $option_buildd and index($line, "\033") != -1) { # \033 = esc
973 # Remove all ANSI color sequences which are sometimes used in
974 # non-verbose builds.
975 $line = Term::ANSIColor::colorstrip($line);
976 # Also strip '\0xf' (delete previous character), used by Elinks'
979 # And "ESC(B" which seems to be used on armhf and hurd (not sure
981 $line =~ s/\033\(B//g;
984 # Check if this line indicates a non verbose build.
986 $non_verbose |= is_non_verbose_build($line, \$skip);
989 # One line may contain multiple commands (";"). Treat each one as
990 # single line. parse_line() is slow, only use it when necessary.
991 my @line = (index($line, ';') == -1)
994 # Ensure newline at the line end - necessary for
995 # correct parsing later.
998 } Text::ParseWords::parse_line(';', 1, $line);
999 foreach my $line (@line) {
1000 if ($continuation) {
1003 # Join lines, but leave the "\" in place so it's clear where
1004 # the original line break was.
1005 chomp $complete_line;
1006 $complete_line .= ' ' . $line;
1008 # Line continuation, line ends with "\".
1009 if ($line =~ /\\$/) {
1011 # Start line continuation.
1012 if (not defined $complete_line) {
1013 $complete_line = $line;
1018 # Use the complete line if a line continuation occurred.
1019 if (defined $complete_line) {
1020 $line = $complete_line;
1021 $complete_line = undef;
1024 # Ignore lines with no compiler commands.
1025 next if not $non_verbose
1026 and not $line =~ /$cc_regex_normal/o;
1027 # Ignore lines with no filenames with extensions. May miss some
1028 # non-verbose builds (e.g. "gcc -o test" [sic!]), but shouldn't be
1029 # a problem as the log will most likely contain other non-verbose
1030 # commands which are detected.
1031 next if not $non_verbose
1032 and not $line =~ /$file_extension_regex/o;
1034 # Ignore false positives.
1036 # `./configure` output.
1037 next if not $non_verbose
1038 and $line =~ /^(?:checking|[Cc]onfigure:) /;
1039 next if $line =~ /^\s*(?:Host\s+)?(?:C(?:\+\+)?\s+)?
1040 [Cc]ompiler[\s.]*:?\s+
1042 next if $line =~ m{^\s*(?:-\s)?(?:HOST_)?(?:CC|CXX)
1043 \s*=\s*$cc_regex_full
1044 # optional compiler options, don't allow
1045 # "everything" here to prevent false negatives
1046 \s*(?:\s-\S+)*\s*$}xo;
1047 # `moc-qt4`/`moc-qt5` contain '-I.../linux-g++' in their command
1048 # line (or similar for other architectures) which gets recognized
1049 # as a compiler line, but `moc-qt*` is only a preprocessor for Qt
1050 # C++ files. No hardening flags are relevant during this step,
1051 # thus ignore `moc-qt*` lines. The resulting files will be
1052 # compiled in a separate step (and therefore checked).
1053 next if $line =~ m{^\S+/bin/moc(?:-qt[45])?
1055 -I\S+/mkspecs/[a-z]+-g\++(?:-64)?
1057 # Ignore false positives when the line contains only CC=gcc but no
1058 # other gcc command.
1059 if ($line =~ /(.*)CC=$cc_regex_full(.*)/o) {
1062 next if not $before =~ /$cc_regex_normal/o
1063 and not $after =~ /$cc_regex_normal/o;
1065 # Ignore false positives caused by gcc -v. It outputs a line
1066 # looking like a normal compiler line but which is sometimes
1067 # missing hardening flags, although the normal compiler line
1069 next if $line =~ m{^\s+/usr/lib/gcc/$cc_regex_full_prefix/
1070 [0-9.]+/cc1(?:plus)?}xo;
1071 # Ignore false positive with `rm` which may remove files which
1072 # look like a compiler executable thus causing the line to be
1073 # treated as a normal compiler line.
1074 next if $line =~ m{^\s*rm\s+};
1075 # Some build systems emit "gcc > file".
1076 next if $line =~ m{$cc_regex_normal\s*>\s*\S+};
1078 # Check if additional hardening options were used. Used to ensure
1079 # they are used for the complete build.
1080 $harden_pie = 1 if any_flags_used($line, @def_cflags_pie,
1082 $harden_bindnow = 1 if any_flags_used($line, @def_ldflags_bindnow);
1085 push @input_nonverbose, $non_verbose;
1086 push @input_number, $number if $option_line_numbers;
1090 close $fh or die $!;
1092 # Ignore arch if requested.
1093 if (scalar @option_ignore_arch > 0 and $arch) {
1094 foreach my $ignore (@option_ignore_arch) {
1095 if ($arch eq $ignore) {
1096 print "ignoring architecture '$arch'\n";
1102 if (scalar @input == 0) {
1103 if (not $option_buildd) {
1104 print "No compiler commands!\n";
1105 $exit |= $exit_code{no_compiler_commands};
1107 print "$buildd_tag{no_compiler_commands}||\n";
1112 if ($option_buildd) {
1113 $statistics{commands} += scalar @input;
1116 # Option or auto detected.
1118 # The following was partially copied from dpkg-dev 1.19.0.5
1119 # (/usr/share/perl5/Dpkg/Vendor/Debian.pm, _add_build_flags()),
1120 # copyright Raphaël Hertzog <hertzog@debian.org>, Guillem Jover
1121 # <guillem@debian.org>, Kees Cook <kees@debian.org>, Canonical, Ltd.
1122 # licensed under GPL version 2 or later. Keep it in sync.
1126 # Recent dpkg versions use a quadruplet for arch. Support both.
1128 (undef, undef, $os, $cpu) = Dpkg::Arch::debarch_to_debtuple($arch);
1131 (undef, $os, $cpu) = Dpkg::Arch::debarch_to_debtriplet($arch);
1134 my %builtin_pie_arch = map { $_ => 1 } qw(
1135 amd64 arm64 armel armhf hurd-i386 i386 kfreebsd-amd64 kfreebsd-i386
1136 mips mipsel mips64el powerpc ppc64 ppc64el s390x sparc sparc64
1139 # Disable unsupported hardening options.
1140 if ($os !~ /^(?:linux|kfreebsd|knetbsd|hurd)$/
1141 or $cpu =~ /^(?:hppa|avr32)$/) {
1144 if ($cpu =~ /^(?:ia64|alpha|hppa|nios2)$/ or $arch eq 'arm') {
1146 $harden_stack_strong = 0;
1148 if ($cpu =~ /^(?:ia64|hppa|avr32)$/) {
1150 $harden_bindnow = 0;
1153 if ($disable_harden_pie and exists $builtin_pie_arch{$arch}) {
1159 my @cflags = @def_cflags;
1160 my @cxxflags = @def_cxxflags;
1161 my @cppflags = @def_cppflags;
1162 my @ldflags = @def_ldflags;
1163 # Check the specified hardening options, same order as dpkg-buildflags.
1165 @cflags = (@cflags, @def_cflags_pie);
1166 @cxxflags = (@cxxflags, @def_cflags_pie);
1167 @ldflags = (@ldflags, @def_ldflags_pie);
1169 if ($harden_stack_strong) {
1170 @cflags = (@cflags, @def_cflags_stack_strong);
1171 @cxxflags = (@cxxflags, @def_cflags_stack_strong);
1172 } elsif ($harden_stack) {
1173 @cflags = (@cflags, @def_cflags_stack);
1174 @cxxflags = (@cxxflags, @def_cflags_stack);
1176 if ($harden_fortify) {
1177 @cflags = (@cflags, @def_cflags_fortify);
1178 @cxxflags = (@cxxflags, @def_cflags_fortify);
1179 @cppflags = (@cppflags, @def_cppflags_fortify);
1181 if ($harden_format) {
1182 @cflags = (@cflags, @def_cflags_format);
1183 @cxxflags = (@cxxflags, @def_cflags_format);
1185 if ($harden_relro) {
1186 @ldflags = (@ldflags, @def_ldflags_relro);
1188 if ($harden_bindnow) {
1189 @ldflags = (@ldflags, @def_ldflags_bindnow);
1192 # Ada doesn't support format hardening flags, see #680117 for more
1193 # information. Same for fortran. Filter them out if either language is
1196 my @cflags_noformat;
1197 if (($ada or $fortran) and $harden_format) {
1198 @cflags_noformat = grep {
1200 foreach my $flag (@def_cflags_format) {
1201 $ok = 0 if $_ eq $flag;
1207 # Hack to fix cppflags_fortify_broken() if --ignore-flag
1208 # -D_FORTIFY_SOURCE=2 is used to ignore missing fortification. Only works
1209 # as long as @def_cppflags_fortify contains only one variable.
1210 if (scalar @def_cppflags_fortify == 0) {
1211 $harden_fortify = 0;
1214 # Ignore flags for this arch if requested.
1215 if ($arch and exists $option_ignore_arch_flag{$arch}) {
1216 my @local_flag_refs = (\@cflags, \@cxxflags, \@cppflags, \@ldflags);
1218 remove_flags(\@local_flag_refs,
1220 @{$option_ignore_arch_flag{$arch}});
1223 my @ignore_line = @option_ignore_line;
1224 # Ignore lines for this arch if requested.
1225 if ($arch and exists $option_ignore_arch_line{$arch}) {
1226 @ignore_line = (@ignore_line, @{$option_ignore_arch_line{$arch}});
1230 for (my $i = 0; $i < scalar @input; $i++) {
1231 my $line = $input[$i];
1233 # Ignore line if requested.
1234 foreach my $ignore (@ignore_line) {
1235 next LINE if $line =~ /$ignore/;
1239 if ($input_nonverbose[$i]
1240 and is_non_verbose_build($line, \$skip,
1241 \@input, $i, $parallel)) {
1242 if (not $option_buildd) {
1243 error_non_verbose_build($line, $input_number[$i]);
1244 $exit |= $exit_code{non_verbose_build};
1246 $statistics{commands_nonverbose}++;
1250 # Even if it's a verbose build, we might have to skip this line (see
1251 # is_non_verbose_build()).
1254 my $orig_line = $line;
1256 # Remove everything until and including the compiler command. Makes
1257 # checks easier and faster.
1258 $line =~ s/^.*?$cc_regex//o;
1259 # "([...] test.c)" is not detected as 'test.c' - fix this by removing
1260 # the brace and similar characters at the line end.
1261 $line =~ s/['")]+$//;
1263 # Skip unnecessary tests when only preprocessing.
1264 my $flag_preprocess = 0;
1271 # Preprocess, compile, assemble.
1272 if ($line =~ /\s(-E|-S|-c)\b/) {
1274 $flag_preprocess = 1 if $1 eq '-E';
1275 $compile = 1 if $1 eq '-S' or $1 eq '-c';
1276 # Dependency generation for Makefiles. The other flags (-MF -MG -MP
1277 # -MT -MQ) are always used with -M/-MM.
1278 } elsif ($line =~ /\s(?:-M|-MM)\b/) {
1280 # Otherwise assume we are linking.
1285 # -MD/-MMD also cause dependency generation, but they don't imply -E!
1286 if ($line =~ /\s(?:-MD|-MMD)\b/) {
1288 $flag_preprocess = 0;
1291 # Dependency generation for Makefiles, no preprocessing or other flags
1293 next if $dependency;
1295 # Get all file extensions on this line.
1296 my @extensions = $line =~ /$file_extension_regex/go;
1297 # Ignore all unknown extensions to speedup the search below.
1298 @extensions = grep { exists $extension{$_} } @extensions;
1300 # These file types don't require preprocessing.
1301 if (extension_found(\%extensions_no_preprocess, @extensions)) {
1304 # These file types require preprocessing.
1305 if (extension_found(\%extensions_preprocess, @extensions)) {
1306 # Prevent false positives with "libtool: link: g++ -include test.h
1307 # .." compiler lines.
1308 if ($orig_line !~ /$libtool_link_regex/o) {
1313 if (not $flag_preprocess) {
1314 # If there are source files then it's compiling/linking in one
1315 # step and we must check both. We only check for source files
1316 # here, because header files cause too many false positives.
1317 if (extension_found(\%extensions_compile_link, @extensions)) {
1318 # Assembly files don't need CFLAGS.
1319 if (not extension_found(\%extensions_compile, @extensions)
1320 and extension_found(\%extensions_no_compile, @extensions)) {
1322 # But the rest does.
1326 # No compilable extensions found, either linking or compiling
1329 # If there are also no object files we are just compiling headers
1330 # (.h -> .h.gch). Don't check for linker flags in this case. Due
1331 # to our liberal checks for compiler lines, this also reduces the
1332 # number of false positives considerably.
1334 and not extension_found(\%extensions_object, @extensions)) {
1339 my $compile_cpp = 0;
1340 my $restore_cflags = 0;
1341 # Assume CXXFLAGS are required when a C++ file is specified in the
1344 and extension_found(\%extensions_compile_cpp, @extensions)) {
1347 # Ada needs special CFLAGS, use them if only ada files are compiled.
1349 and extension_found(\%extensions_ada, @extensions)) {
1350 $restore_cflags = 1;
1351 $preprocess = 0; # Ada uses no CPPFLAGS
1352 @cflags_backup = @cflags;
1353 @cflags = @cflags_noformat;
1356 and extension_found(\%extensions_fortran, @extensions)) {
1357 $restore_cflags = 1;
1358 @cflags_backup = @cflags;
1359 @cflags = @cflags_noformat;
1362 if ($option_buildd) {
1363 $statistics{preprocess}++ if $preprocess;
1364 $statistics{compile}++ if $compile;
1365 $statistics{compile_cpp}++ if $compile_cpp;
1366 $statistics{link}++ if $link;
1369 # Check if there are flags indicating a debug build. If that's true,
1370 # skip the check for -O2. This prevents fortification, but that's fine
1371 # for a debug build.
1372 if (any_flags_used($line, @def_cflags_debug)) {
1373 remove_flags([\@cflags], \%flag_renames, $def_cflags[1]);
1374 remove_flags([\@cppflags], \%flag_renames, $def_cppflags_fortify[0]);
1377 # Check hardening flags.
1379 if ($compile and (not all_flags_used($line, \@missing, @cflags)
1380 or (($harden_stack or $harden_stack_strong)
1381 and cflags_stack_broken($line, \@missing,
1382 $harden_stack_strong)))
1383 # Libraries linked with -fPIC don't have to (and can't) be
1384 # linked with -fPIE as well. It's no error if only PIE flags
1386 and not pic_pie_conflict($line, $harden_pie, \@missing, @def_cflags_pie)
1387 # Assume dpkg-buildflags returns the correct flags.
1388 and index($line, '`dpkg-buildflags --get CFLAGS`') == -1) {
1389 if (not $option_buildd) {
1390 error_flags('CFLAGS missing', \@missing, \%flag_renames,
1391 $input[$i], $input_number[$i]);
1392 $exit |= $exit_code{flags_missing};
1394 $statistics{compile_missing}++;
1396 } elsif ($compile_cpp and not all_flags_used($line, \@missing, @cflags)
1397 # Libraries linked with -fPIC don't have to (and can't) be
1398 # linked with -fPIE as well. It's no error if only PIE flags
1400 and not pic_pie_conflict($line, $harden_pie, \@missing, @def_cflags_pie)
1401 # Assume dpkg-buildflags returns the correct flags.
1402 and index($line, '`dpkg-buildflags --get CXXFLAGS`') == -1) {
1403 if (not $option_buildd) {
1404 error_flags('CXXFLAGS missing', \@missing, \%flag_renames,
1405 $input[$i], $input_number[$i]);
1406 $exit |= $exit_code{flags_missing};
1408 $statistics{compile_cpp_missing}++;
1412 and (not all_flags_used($line, \@missing, @cppflags)
1413 # The fortify flag might be overwritten, detect that.
1415 and cppflags_fortify_broken($line, \@missing)))
1416 # Assume dpkg-buildflags returns the correct flags.
1417 and index($line, '`dpkg-buildflags --get CPPFLAGS`') == -1) {
1418 if (not $option_buildd) {
1419 error_flags('CPPFLAGS missing', \@missing, \%flag_renames,
1420 $input[$i], $input_number[$i]);
1421 $exit |= $exit_code{flags_missing};
1423 $statistics{preprocess_missing}++;
1426 if ($link and not all_flags_used($line, \@missing, @ldflags)
1427 # Same here, -fPIC conflicts with -fPIE.
1428 and not pic_pie_conflict($line, $harden_pie, \@missing, @def_ldflags_pie)
1429 # Assume dpkg-buildflags returns the correct flags.
1430 and index($line, '`dpkg-buildflags --get LDFLAGS`') == -1) {
1431 if (not $option_buildd) {
1432 error_flags('LDFLAGS missing', \@missing, \%flag_renames,
1433 $input[$i], $input_number[$i]);
1434 $exit |= $exit_code{flags_missing};
1436 $statistics{link_missing}++;
1440 # Restore normal CFLAGS.
1441 if ($restore_cflags) {
1442 @cflags = @cflags_backup;
1447 # Print statistics for buildd mode, only output in this mode.
1448 if ($option_buildd) {
1451 if ($statistics{preprocess_missing}) {
1452 push @warning, sprintf 'CPPFLAGS %d (of %d)',
1453 $statistics{preprocess_missing},
1454 $statistics{preprocess};
1456 if ($statistics{compile_missing}) {
1457 push @warning, sprintf 'CFLAGS %d (of %d)',
1458 $statistics{compile_missing},
1459 $statistics{compile};
1461 if ($statistics{compile_cpp_missing}) {
1462 push @warning, sprintf 'CXXFLAGS %d (of %d)',
1463 $statistics{compile_cpp_missing},
1464 $statistics{compile_cpp};
1466 if ($statistics{link_missing}) {
1467 push @warning, sprintf 'LDFLAGS %d (of %d)',
1468 $statistics{link_missing},
1471 if (scalar @warning) {
1472 local $" = ', '; # array join string
1473 print "$buildd_tag{flags_missing}|@warning missing|\n";
1476 if ($statistics{commands_nonverbose}) {
1477 printf "$buildd_tag{non_verbose_build}|%d (of %d) hidden|\n",
1478 $statistics{commands_nonverbose},
1479 $statistics{commands},
1491 blhc - build log hardening check, checks build logs for missing hardening flags
1495 B<blhc> [I<options>] I<< <dpkg-buildpackage build log file>.. >>
1499 blhc is a small tool which checks build logs for missing hardening flags. It's
1500 licensed under the GPL 3 or later.
1502 It's designed to check build logs generated by Debian's dpkg-buildpackage (or
1503 tools using dpkg-buildpackage like pbuilder or sbuild (which is used for the
1504 official buildd build logs)) to help maintainers detect missing hardening
1505 flags in their packages.
1507 Only gcc is detected as compiler at the moment. If other compilers support
1508 hardening flags as well, please report them.
1510 If there's no output, no flags are missing and the build log is fine.
1512 See F<README> for details about performed checks, auto-detection and
1521 Force check for all +all (+pie, +bindnow) hardening flags. By default it's
1524 =item B<--arch> I<architecture>
1526 Set the specific architecture (e.g. amd64, armel, etc.), automatically
1527 disables hardening flags not available on this architecture. Is detected
1528 automatically if dpkg-buildpackage is used.
1532 Force check for all +bindnow hardening flags. By default it's auto detected.
1536 Special mode for buildds when automatically parsing log files. The following
1537 changes are in effect:
1543 Print tags instead of normal warnings, see L</"BUILDD TAGS"> for a list of
1548 Don't check hardening flags in old log files (if dpkg-dev << 1.16.1 is
1553 Don't require Term::ANSIColor.
1557 Return exit code 0, unless there was a error (-I, -W messages don't count as
1564 Apply Debian-specific settings. At the moment this only disables checking for
1565 PIE which is automatically applied by Debian's GCC and no longer requires a
1566 compiler command line argument.
1570 Use colored (ANSI) output for warning messages.
1572 =item B<--line-numbers>
1574 Display line numbers.
1576 =item B<--ignore-arch> I<arch>
1578 Ignore build logs from architectures matching I<arch>. I<arch> is a string.
1580 Used to prevent false positives. This option can be specified multiple times.
1582 =item B<--ignore-arch-flag> I<arch>:I<flag>
1584 Like B<--ignore-flag>, but only ignore flag on I<arch>.
1586 =item B<--ignore-arch-line> I<arch>:I<line>
1588 Like B<--ignore-line>, but only ignore line on I<arch>.
1590 =item B<--ignore-flag> I<flag>
1592 Don't print an error when the specific flag is missing in a compiler line.
1593 I<flag> is a string.
1595 Used to prevent false positives. This option can be specified multiple times.
1597 =item B<--ignore-line> I<regex>
1599 Ignore lines matching the given Perl regex. I<regex> is automatically anchored
1600 at the beginning and end of the line to prevent false negatives.
1602 B<NOTE>: Not the input lines are checked, but the lines which are displayed in
1603 warnings (which have line continuation resolved).
1605 Used to prevent false positives. This option can be specified multiple times.
1609 Force check for all +pie hardening flags. By default it's auto detected.
1611 =item B<-h -? --help>
1613 Print available options.
1617 Print version number and license.
1621 Auto detection for B<--pie> and B<--bindnow> only works if at least one
1622 command uses the required hardening flag (e.g. -fPIE). Then it's required for
1623 all other commands as well.
1627 Normal usage, parse a single log file.
1629 blhc path/to/log/file
1631 If there's no output, no flags are missing and the build log is fine.
1633 Parse multiple log files. The exit code is ORed over all files.
1635 blhc path/to/directory/with/log/files/*
1637 Don't treat missing C<-g> as error:
1639 blhc --ignore-flag -g path/to/log/file
1641 Don't treat missing C<-pie> on kfreebsd-amd64 as error:
1643 blhc --ignore-arch-flag kfreebsd-amd64:-pie path/to/log/file
1645 Ignore lines consisting exactly of C<./script gcc file> which would cause a
1648 blhc --ignore-line '\./script gcc file' path/to/log/file
1650 Ignore lines matching C<./script gcc file> somewhere in the line.
1652 blhc --ignore-line '.*\./script gcc file.*' path/to/log/file
1654 Use blhc with pbuilder.
1656 pbuilder path/to/package.dsc | tee path/log/file
1657 blhc path/to/file || echo flags missing
1659 Assume this build log was created on a Debian system and thus don't warn about
1660 missing PIE flags if the current architecture injects them automatically (this
1661 is enabled in buildd mode per default). C<--arch> is necessary if the build
1662 log contains no architecture information as written by dpkg-buildpackage.
1664 blhc --debian --all --arch=amd64 path/to/log/file
1668 The following tags are used in I<--buildd> mode. In braces the additional data
1673 =item B<I-hardening-wrapper-used>
1675 The package uses hardening-wrapper which intercepts calls to gcc and adds
1676 hardening flags. The build log doesn't contain any hardening flags and thus
1677 can't be checked by blhc.
1679 =item B<W-compiler-flags-hidden> (summary of hidden lines)
1681 Build log contains lines which hide the real compiler flags. For example:
1688 Most of the time either C<export V=1> or C<export verbose=1> in
1689 F<debian/rules> fixes builds with hidden compiler flags. Sometimes C<.SILENT>
1690 in a F<Makefile> must be removed. And as last resort the F<Makefile> must be
1691 patched to remove the C<@>s hiding the real compiler commands.
1693 =item B<W-dpkg-buildflags-missing> (summary of missing flags)
1695 CPPFLAGS, CFLAGS, CXXFLAGS, LDFLAGS missing.
1697 =item B<I-invalid-cmake-used> (version)
1699 By default CMake ignores CPPFLAGS thus missing those hardening flags. Debian
1700 patched CMake in versions 2.8.7-1 and 2.8.7-2 to respect CPPFLAGS, but this
1701 patch was rejected by upstream and later reverted in Debian. Thus those two
1702 versions show correct usage of CPPFLAGS even if the package doesn't correctly
1703 handle them (for example by passing them to CFLAGS). To prevent false
1704 negatives just blacklist those two versions.
1706 =item B<I-no-compiler-commands>
1708 No compiler commands were detected. Either the log contains none or they were
1709 not correctly detected by blhc (please report the bug in this case).
1715 The exit status is a "bit mask", each listed status is ORed when the error
1716 condition occurs to get the result.
1726 No compiler commands were found.
1730 Invalid arguments/options given to blhc.
1738 Missing hardening flags.
1742 Hardening wrapper detected, no tests performed.
1746 Invalid CMake version used. See B<I-invalid-cmake-used> under L</"BUILDD
1747 TAGS"> for a detailed explanation.
1753 Simon Ruderich, E<lt>simon@ruderich.orgE<gt>
1755 Thanks to to Bernhard R. Link E<lt>brlink@debian.orgE<gt> and Jaria Alto
1756 E<lt>jari.aalto@cante.netE<gt> for their valuable input and suggestions.
1758 =head1 LICENSE AND COPYRIGHT
1760 Copyright (C) 2012-2018 by Simon Ruderich
1762 This program is free software: you can redistribute it and/or modify
1763 it under the terms of the GNU General Public License as published by
1764 the Free Software Foundation, either version 3 of the License, or
1765 (at your option) any later version.
1767 This program is distributed in the hope that it will be useful,
1768 but WITHOUT ANY WARRANTY; without even the implied warranty of
1769 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1770 GNU General Public License for more details.
1772 You should have received a copy of the GNU General Public License
1773 along with this program. If not, see <http://www.gnu.org/licenses/>.
1777 L<hardening-check(1)>, L<dpkg-buildflags(1)>