CI: Bump and ref actions by commit SHA in windows-ci.yml
Referencing actions by commit SHA in GitHub workflows guarantees you are using an immutable version. Actions referenced by tags and branches are more vulnerable to attacks, such as the tag being moved to a malicious commit or a malicious commit being pushed to the branch.
It's important to make sure the SHA's are from the original repositories and not forks.
Referencing actions by commit SHA in GitHub workflows guarantees you are using an immutable version. Actions referenced by tags and branches are more vulnerable to attacks, such as the tag being moved to a malicious commit or a malicious commit being pushed to the branch.
It's important to make sure the SHA's are from the original repositories and not forks.
Lasse Collin [Fri, 6 Oct 2023 15:55:57 +0000 (18:55 +0300)]
CMake/Windows: Fix when the windres workaround is applied.
CMake doesn't set WIN32 on CYGWIN but the workaround is
probably needed on Cygwin too. Same for MSYS and MSYS2.
The workaround must not be used with Clang that is acting in
MSVC mode. This fixes it by checking for the known environments
that need the workaround instead of using "NOT MSVC".
Jia Tan [Fri, 29 Sep 2023 14:11:54 +0000 (22:11 +0800)]
CI: Disable CLANG64 MSYS2 environment until bug is resolved.
lld 17.0.1 searches for libraries to link first in the toolchain
directories before the local directory when building. The is a problem
for us because liblzma.a is installed in MSYS2 CLANG64 by default and
xz.exe will thus use the installed library instead of the one being
built.
This causes tests to fail when they are expecting features to be
disabled. More importantly, it will compile xz.exe with an incorrect
liblzma and could cause unexpected behavior by being unable to update
liblzma code in static builds. The CLANG64 environment can be tested
again once this is fixed.
Link to bug: https://github.com/llvm/llvm-project/issues/67779.
Jia Tan [Fri, 29 Sep 2023 12:14:39 +0000 (20:14 +0800)]
CMake: Rename xz and man page symlink custom targets.
The Ninja Generator for CMake cannot have a custom target and its
BYPRODUCTS have the same name. This has prevented Ninja builds on
Unix-like systems since the xz symlinks were introduced in 80a1a8bb838842a2be343bd88ad1462c21c5e2c9.
Lasse Collin [Tue, 26 Sep 2023 18:47:13 +0000 (21:47 +0300)]
liblzma: Update a comment.
The C standards don't allow an empty translation unit which can be
avoided by declaring something, without exporting any symbols.
When I committed f644473a211394447824ea00518d0a214ff3f7f2 I had
a feeling that some specific toolchain somewhere didn't like
empty object files (assembler or maybe "ar" complained) but
I cannot find anything to confirm this now. Quite likely I
remembered nonsense. I leave this here as a note to my future self. :-)
Jia Tan [Tue, 26 Sep 2023 16:02:11 +0000 (00:02 +0800)]
liblzma: Avoid compiler warning without creating extra symbol.
When the generic fast crc64 method is used, then we omit
lzma_crc64_table[][]. Similar to d9166b52cf3458a4da3eb92224837ca8fc208d79, we can avoid compiler warnings
with -Wempty-translation-unit (Clang) or -pedantic (GCC) by creating a
never used typedef instead of an extra symbol.
Lasse Collin [Tue, 26 Sep 2023 12:00:43 +0000 (15:00 +0300)]
Build: Fix __attribute__((ifunc(...))) detection with clang -Wall.
Now if user-supplied CFLAGS contains -Wall -Wextra -Wpedantic
the two checks that need -Werror will still work.
At CMake side there is add_compile_options(-Wall -Wextra)
but it didn't affect the -Werror tests. So with both Autotools
and CMake only user-supplied CFLAGS could make the checks fail
when they shouldn't.
This is not a full fix as things like -Wunused-macros in
user-supplied CFLAGS will still cause problems with both
GCC and Clang.
Lasse Collin [Tue, 26 Sep 2023 10:14:37 +0000 (13:14 +0300)]
Build: Silence two Autoconf warnings.
There were two uses of AC_COMPILE_IFELSE that didn't use
AC_LANG_SOURCE and Autoconf warned about these. The omission
had been intentional but it turned out that this didn't do
what I thought it would.
Autoconf 2.71 manual gives an impression that AC_LANG_SOURCE
inserts all #defines that have been made with AC_DEFINE so
far (confdefs.h). The idea was that omitting AC_LANG_SOURCE
would mean that only the exact code included in the
AC_COMPILE_IFELSE call would be compiled.
With C programs this is not true: the #defines get added without
AC_LANG_SOURCE too. There seems to be no neat way to avoid this.
Thus, with the C language at least, adding AC_LANG_SOURCE makes
no other difference than silencing a warning from Autoconf. The
generated "configure" remains identical. (Docs of AC_LANG_CONFTEST
say that the #defines have been inserted since Autoconf 2.63b and
that AC_COMPILE_IFELSE uses AC_LANG_CONFTEST. So the behavior is
documented if one also reads the docs of macros that one isn't
calling directly.)
Any extra code, including #defines, can cause problems for
these two tests because these tests must use -Werror.
CC=clang CFLAGS=-Weverything is the most extreme example.
It enables -Wreserved-macro-identifier which warns about
#define __EXTENSIONS__ 1 because it begins with two underscores.
It's possible to write a test file that passes -Weverything but
it becomes impossible when Autoconf inserts confdefs.h.
So this commit adds AC_LANG_SOURCE to silence Autoconf warnings.
A different solution is needed for -Werror tests.
Jia Tan [Fri, 22 Sep 2023 19:27:00 +0000 (03:27 +0800)]
lib: Update getopt.in.h from Gnulib with modifications.
We can still avoid modifying the contents of this file during
configuration to simplify the build systems. Gnulib added replacements
for inclusions guards for Cygwin. Cygwin should not need getopt_long
replacement so this feature can be omitted.
<unistd.h> is conditionally included to avoid MSVC since it is not
available.
The definition for _GL_ARG_NONNULL was also copied into this file from
Gnulib since this stage is usually done during gnulib-tool.
Jia Tan [Fri, 22 Sep 2023 16:18:56 +0000 (00:18 +0800)]
lib: Add getopt-cdefs.h for getopt_long update.
This was modified slightly from Gnulib. In Gnulib, it expects the
@HAVE_SYS_CDEFS_H@ to be replaced. Instead, we can set HAVE_SYS_CDEFS_H
on systems that have it and avoid copying another file into the build
directory. Since we are not using gnulib-tool, copying extra files
requires extra build system updates (and special handling with CMake) so
we should avoid when possible.
Jia Tan [Fri, 22 Sep 2023 16:15:25 +0000 (00:15 +0800)]
lib: Copy new header files from Gnulib without modification.
The getopt related files have changed from Gnulib by splitting up
getopt.in.h into more modular header files. We could have kept
everything in just getopt.in.h, but this will help us continue to update
in the future.
It cannot happen without --suffix because names like con.xz
are also special and so attempting to decompress con.xz
(or compress con to con.xz) will already fail when opening
the input file.
Similar thing is possible when compressing. The following
writes to "nul" and the input file "n" is deleted.
echo foo | xz > n
xz --suffix=ul n
Now xz checks if the destination is a special file before
continuing. DOS/DJGPP version had a check for this but
Windows (and OS/2) didn't.
Lasse Collin [Thu, 21 Sep 2023 16:17:40 +0000 (19:17 +0300)]
CMake: Require VS2015 or later for building xzdec.
xzdec might build with VS2013 but it hasn't been tested.
It was never supported before and VS2013 is old anyway
so for simplicity only liblzma is supported with VS2013.
Lasse Collin [Tue, 12 Sep 2023 20:43:49 +0000 (23:43 +0300)]
CMake: Allow building xz with Visual Studio 2015 and later.
Building the command line tools xz and xzdec with the combination
of CMake + Visual Studio 2015/2017/2019/2022 works now.
VS2013 update 2 should still be able to build liblzma.
VS2013 cannot build the xz command line tool because xz
needs snprintf() that roughly conforms to C99.
VS2013 is old and no extra code will be added to support it.
Lasse Collin [Tue, 12 Sep 2023 18:12:34 +0000 (21:12 +0300)]
CMake: Bump maximum policy version to 3.27.
There are several new policies. CMP0149 may affect the Windows SDK
version that CMake will choose by default. The new behavior is more
predictable, always choosing the latest SDK version by default.
The other new policies shouldn't affect this package.
Lasse Collin [Tue, 12 Sep 2023 17:55:10 +0000 (20:55 +0300)]
lib/getopt*.c: Include <config.h> only HAVE_CONFIG_H is defined.
The CMake-based build doesn't use config.h.
Up-to-date getopt_long in Gnulib is LGPLv2 so at some
point it could be included in XZ Utils too but for now
this commit is enough to make CMake-based build possible.
Lasse Collin [Mon, 11 Sep 2023 16:03:35 +0000 (19:03 +0300)]
xz, xzdec, lzmainfo: Use tuklib_attr_noreturn.
For compatibility with C23's [[noreturn]], tuklib_attr_noreturn
must be at the beginning of declaration (before "extern" or
"static", and even before any GNU C's __attribute__).
This commit also moves all other function attributes to
the beginning of function declarations. "extern" is kept
at the beginning of a line so the attributes are listed on
separate lines before "extern" or "static".
Lasse Collin [Mon, 11 Sep 2023 15:53:31 +0000 (18:53 +0300)]
Remove incorrect uses of __attribute__((__malloc__)).
xrealloc() is obviously incorrect, modern GCC docs even
mention realloc() as an example where this attribute
cannot be used.
liblzma's lzma_alloc() and lzma_alloc_zero() would be
correct uses most of the time but custom allocators
may use a memory pool or otherwise hold the pointer
so aliasing issues could happen in theory.
The xstrdup() case likely was correct but I removed it anyway.
Now there are no __malloc__ attributes left in the code.
The allocations aren't in hot paths so this should make
no practical difference.
Lasse Collin [Fri, 8 Sep 2023 15:19:26 +0000 (18:19 +0300)]
tuklib: Update tuklib_attr_noreturn for C11/C17 and C23.
This makes no difference for GCC or Clang as they support
GNU C's __attribute__((__noreturn__)) but this helps with MSVC:
- VS 2019 version 16.7 and later support _Noreturn if the
options /std:c11 or /std:c17 are used. This gets handled
with the check for __STDC_VERSION__ >= 201112.
- When MSVC isn't in C11/C17 mode, __declspec(noreturn) is used.
C23 will deprecate _Noreturn (and <stdnoreturn.h>)
for [[noreturn]]. This commit anticipates that but
the final __STDC_VERSION__ value isn't known yet.
Jia Tan [Tue, 12 Sep 2023 14:36:12 +0000 (22:36 +0800)]
CMake: Fix time.h checks not running on second CMake run.
If CMake was configured more than once, HAVE_CLOCK_GETTIME and
HAVE_CLOCK_MONOTONIC would not be set as compile definitions. The check
for librt being needed to provide HAVE_CLOCK_GETTIME was also
simplified.
Lasse Collin [Thu, 31 Aug 2023 16:50:05 +0000 (19:50 +0300)]
xz: Refactor thousand separator detection and disable it on MSVC.
Now the two variations of the format strings are created with
a macro, and the whole detection code can be easily disabled
on platforms where thousand separator formatting is known to
not work (MSVC has no support, and on DJGPP 2.05 it can have
problems in some cases).
Jia Tan [Mon, 28 Aug 2023 13:50:16 +0000 (21:50 +0800)]
liblzma: Update assert in vli_ceil4().
The argument to vli_ceil4() should always guarantee the return value
is also a valid lzma_vli. Thus the highest three valid lzma_vli values
are invalid arguments. All uses of the function ensure this so the
assert is updated to match this.
Jia Tan [Mon, 28 Aug 2023 13:31:25 +0000 (21:31 +0800)]
liblzma: Add overflow check for Unpadded size in lzma_index_append().
This was not a security bug since there was no path to overflow
UINT64_MAX in lzma_index_append() or when it calls index_file_size().
The bug was discovered by a failing assert() in vli_ceil4() when called
from index_file_size() when unpadded_sum (the sum of the compressed size
of current Stream and the unpadded_size parameter) exceeds LZMA_VLI_MAX.
Previously, the unpadded_size parameter was checked to be not greater
than UNPADDED_SIZE_MAX, but no check was done once compressed_base was
added.
This could not have caused an integer overflow in index_file_size() when
called by lzma_index_append(). The calculation for file_size breaks down
into the sum of:
- Compressed base from all previous Streams
- 2 * LZMA_STREAM_HEADER_SIZE (size of the current Streams header and
footer)
- stream_padding (can be set by lzma_index_stream_padding())
- Compressed base from the current Stream
- Unpadded size (parameter to lzma_index_append())
The sum of everything except for Unpadded size must be less than
LZMA_VLI_MAX. This is guarenteed by overflow checks in the functions
that can set these values including lzma_index_stream_padding(),
lzma_index_append(), and lzma_index_cat(). The maximum value for
Unpadded size is enforced by lzma_index_append() to be less than or
equal UNPADDED_SIZE_MAX. Thus, the sum cannot exceed UINT64_MAX since
LZMA_VLI_MAX is half of UINT64_MAX.
Jia Tan [Wed, 9 Aug 2023 12:35:16 +0000 (20:35 +0800)]
Build: Conditionally allow win95 threads and --enable-small.
When the compiler supports __attribute__((__constructor__))
mythread_once() is never used, even with --enable-small. A configuration
with win95 threads and --enable-small will compile and be thread safe so
it can be allowed.
This isn't a very common configuration since MSVC does not support
__attribute__((__constructor__)), but MINGW32 and CLANG32 environments
for MSYS2 can use win95 threads and have
__attribute__((__constructor__)) support.
Jamaika1 [Tue, 8 Aug 2023 12:07:59 +0000 (14:07 +0200)]
mythread.h: Fix typo error in Vista threads mythread_once().
The "once_" variable was accidentally referred to as just "once". This
prevented building with Vista threads when
HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR was not defined.
Jia Tan [Fri, 4 Aug 2023 14:17:11 +0000 (22:17 +0800)]
codespell: Add .codespellrc to set default options.
The .codespellrc allows setting default options to avoid false positive
matches, set additional dictionaries, etc. For now, codespell can be
used locally before committing doc and comment changes.
It should help prevent silly errors and fix up commits in the future.
Lasse Collin [Wed, 2 Aug 2023 12:19:43 +0000 (15:19 +0300)]
build-aux/manconv.sh: Fix US-ASCII and UTF-8 output.
groff defaults to SGR escapes. Using -P-c passes -c to grotty
which restores the old behavior. Perhaps there is a better way to
get pure plain text output but this works for now.
ChanTsune [Tue, 1 Aug 2023 15:17:17 +0000 (18:17 +0300)]
mythread.h: Disable signal functions in builds targeting Wasm + WASI.
signal.h in WASI SDK doesn't currently provide sigprocmask()
or sigset_t. liblzma doesn't need them so this change makes
liblzma and xzdec build against WASI SDK. xz doesn't build yet
and the tests don't either as tuktest needs setjmp() which
isn't (yet?) implemented in WASI SDK.
Closes: https://github.com/tukaani-project/xz/pull/57
See also: https://github.com/tukaani-project/xz/pull/56
(The original commit was edited a little by Lasse Collin.)
Jia Tan [Fri, 28 Jul 2023 14:03:08 +0000 (22:03 +0800)]
CMake: Conditionally allow the creation of broken symlinks.
The CMake build will try to create broken symlinks on Unix and Unix-like
platforms. Cygwin and MSYS2 are Unix-like, but may not be able to create
broken symlinks. The value of the CYGWIN or MSYS environment variables
determine if broken symlinks are valid.
Jia Tan [Fri, 28 Jul 2023 13:56:48 +0000 (21:56 +0800)]
CI: Fix windows-ci dependency installation.
All of the MSYS2 environments need make, and it does not come with the
toolchain package. The toolchain package will install the needed
compiler toolchains since without this package CMake cannot properly
generate the Makefiles.
Jia Tan [Fri, 28 Jul 2023 13:54:22 +0000 (21:54 +0800)]
CI: Update ci_build.sh CMake to always make Unix Makefiles.
The default for many of the MSYS2 environments is for CMake to create
Ninja build files. This would complicate the build script since we would
need a different command to run the tests. Its simpler to always use
Unix Makefiles so that "make test" is always a usable target for
testing.