Commit Graph

2164 Commits

Author SHA1 Message Date
Jia Tan 30d0c35327 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
80a1a8bb83.
2023-09-29 20:14:39 +08:00
Jia Tan 506d03127a CMake: Specify LINKER_LANGUAGE for libgnu target to fix Ninja Generator.
CMake is unable to guess the linker language for just a header file so
it must be explicitly set.
2023-09-29 19:58:44 +08:00
Lasse Collin 0570308ddd CMake: Fix Windows build with Clang/LLVM 17.
llvm-windres 17.0.0 has more accurate emulation of GNU windres, so
the hack for GNU windres must now be used with llvm-windres too.

LLVM 16.0.6 has the old behavior and there likely won't be more
16.x releases. So we can simply check for >= 17.0.0.

See also:
2bcc0fdc58
2023-09-27 20:49:46 +03:00
Lasse Collin 5a9af95f85 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 f644473a21 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. :-)
2023-09-26 21:47:13 +03:00
Jia Tan 8ebaf3f665 liblzma: Avoid compiler warning without creating extra symbol.
When the generic fast crc64 method is used, then we omit
lzma_crc64_table[][]. Similar to
d9166b52cf, we can avoid compiler warnings
with -Wempty-translation-unit (Clang) or -pedantic (GCC) by creating a
never used typedef instead of an extra symbol.
2023-09-27 00:04:40 +08:00
Lasse Collin 092d21db2e Build: Update the comment about -Werror usage in checks. 2023-09-26 17:24:15 +03:00
Lasse Collin a37a276338 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.
2023-09-26 15:00:43 +03:00
Lasse Collin 9c42f93693 Build: Fix underquoted AC_LANG_SOURCE.
It made no practical difference in this case.
2023-09-26 13:51:31 +03:00
Lasse Collin 9f1444a8a5 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.
2023-09-26 13:50:19 +03:00
Jia Tan 519e47c281 CMake: Remove accidental extra newline. 2023-09-26 01:17:11 +08:00
Jia Tan bbb42412da Build: Remove Gnulib dependency from tests.
The tests do not use any Gnulib replacements so they do not need to link
libgnu.a or have /lib in the include path.
2023-09-26 00:47:26 +08:00
Jia Tan d265f6b756 CMake: Remove /lib from tests include path.
The tests never included anything from /lib, so this was not needed.
2023-09-26 00:43:43 +08:00
Jia Tan 9fb5de41f2 Scripts: Change quoting style from `...' to '...'. 2023-09-24 22:10:41 +08:00
Jia Tan eaebdef4d4 xz: Change quoting style from `...' to '...'. 2023-09-24 22:10:18 +08:00
Jia Tan f6667702bf liblzma: Change quoting style from `...' to '...'.
This was done for both internal and API headers.
2023-09-24 22:09:47 +08:00
Jia Tan be012b8097 Build: Change quoting style from `...' to '...'. 2023-09-24 22:09:16 +08:00
Jia Tan ce162db07f Docs: Change quoting style from `...' to '...'.
These days the ` and ' do not look symmetric. This quoting style has
been changed in various apps over the years including the GNU tools.
2023-09-24 22:05:02 +08:00
Jia Tan db17656721 lib: Silence -Wsign-conversion in getopt.c. 2023-09-24 21:25:01 +08:00
Jia Tan a6234f677d Build: Update getopt.m4 from Gnulib.
This file was modified from upstream since we do not need to replace
getopt() and can avoid complexity and feature tests.
2023-09-24 20:48:52 +08:00
Jia Tan 84808b68f1 CMake: Add /lib to include path. 2023-09-26 00:09:53 +08:00
Jia Tan 01804a0b4b CMake: Update libgnu target with new header files. 2023-09-24 20:36:34 +08:00
Jia Tan d34558388f lib: Update Makefile.am for new header files. 2023-09-23 00:47:52 +08:00
Jia Tan 52bf644bdf lib: Update getopt1.c from Gnulib.
The only difference was maintaining the conditional inclusion for
config.h.
2023-09-24 20:34:03 +08:00
Jia Tan 7e884c00d0 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.
2023-09-23 03:27:00 +08:00
Jia Tan cff05f8206 lib: Update getopt_int.h from Gnulib. 2023-09-23 00:31:55 +08:00
Jia Tan 04bd86a4b0 lib: Update getopt.c from Gnulib with modifications.
The code maintains the prior modifications of conditionally including
config.h and disabling NLS support.

_GL_UNUSED is repalced with the simple cast to void trick. _GL_UNUSED
is only used for these two parameters so its simpler than having to
define it.
2023-09-23 00:27:23 +08:00
Jia Tan 56b42be728 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.
2023-09-23 00:18:56 +08:00
Jia Tan 9834e591a4 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.
2023-09-23 00:15:25 +08:00
Lasse Collin 5b7a6f06e9 Windows: Update the version requirement comments from Win95 to W2k. 2023-09-24 17:48:13 +03:00
Lasse Collin e582f8e0fe tuklib_physmem: Comment out support for Windows versions older than 2000. 2023-09-24 17:48:13 +03:00
Lasse Collin 7d73d1f0e0 sysdefs.h: Update the comment about __USE_MINGW_ANSI_STDIO. 2023-09-24 16:32:32 +03:00
Lasse Collin 2a9929af0a xz: Windows: Don't (de)compress to special files like "con" or "nul".
Before this commit, the following writes "foo" to the
console and deletes the input file:

    echo foo | xz > con_xz
    xz --suffix=_xz --decompress con_xz

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.
2023-09-22 20:16:40 +03:00
Lasse Collin 01311b81f0 CMake: Wrap two overlong lines that are possible to wrap. 2023-09-22 20:10:10 +03:00
Lasse Collin 152d0771dd CMake: Add a comment about threads on Cygwin. 2023-09-22 20:10:10 +03:00
Lasse Collin 6df988ccef MSVC: Remove Visual Studio project files and update INSTALL-MSVC.txt.
CMake is now the preferred build file generator when building
with MSVC.
2023-09-22 20:10:10 +03:00
Lasse Collin edd563daf0 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.
2023-09-22 20:10:10 +03:00
Lasse Collin daea64d158 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.

Thanks to Kelvin Lee and Jia Tan for testing.
2023-09-22 20:06:27 +03:00
Lasse Collin 8c2d197c94 MSVC: #define inline and restrict only when needed.
This also drops the check for _WIN32 as that shouldn't be needed.
2023-09-22 20:06:27 +03:00
Lasse Collin af66cd5859 CMake: Add support for replacement getopt_long (lib/getopt*).
Thanks to Jia Tan for the initial work. I added the libgnu target
and made a few related minor edits.
2023-09-22 20:06:27 +03:00
Lasse Collin e3288fdb45 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.
2023-09-22 20:06:27 +03:00
Lasse Collin aff1b479c7 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.
2023-09-22 20:06:27 +03:00
Lasse Collin aa0cd585d2 Doxygen: Add more C macro names to PREDEFINED. 2023-09-22 20:06:27 +03:00
Lasse Collin ee7709bae5 liblzma: Move a few __attribute__ uses in function declarations.
The API headers have many attributes but these were left
as is for now.
2023-09-22 20:06:27 +03:00
Lasse Collin 217958d887 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".
2023-09-22 20:06:27 +03:00
Lasse Collin 18a66fbac0 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.
2023-09-22 20:06:27 +03:00
Lasse Collin 74b0e900c9 Build: Omit -Wc99-c11-compat since it warns about _Noreturn. 2023-09-22 20:06:26 +03:00
Lasse Collin 90c94dddfd 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.
2023-09-22 20:06:21 +03:00
Lasse Collin 189f725813 Update THANKS. 2023-09-22 20:00:38 +03:00
Lasse Collin 79334e7f20 MSVC: xz: Make file_io.c and file_io.h compatible with MSVC.
Thanks to Kelvin Lee for the original patches
and testing the modifications I made.
2023-09-22 20:00:38 +03:00
Lasse Collin c660b8d78b MSVC: xz: Use GetTickCount64() to implement mytime_now().
It's available since Windows Vista.
2023-09-22 20:00:38 +03:00