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2024-01-27Speed up CRC32 calculation on ARM64Chenxi Mao1-0/+1
The CRC32 instructions in ARM64 can calculate the CRC32 result for 8 bytes in a single operation, making the use of ARM64 instructions much faster compared to the general CRC32 algorithm. Optimized CRC32 will be enabled if ARM64 has CRC extension running on Linux. Signed-off-by: Chenxi Mao <chenxi.mao2013@gmail.com>
2024-01-23CMake: Support RISC-V BCJ Filter for encoding and decoding.Jia Tan1-0/+1
2024-01-19Build: Update website URL.Jia Tan1-1/+1
2024-01-11liblzma: Avoid extern lzma_crc32_clmul() and lzma_crc64_clmul().Lasse Collin1-5/+2
A CLMUL-only build will have the crcxx_clmul() inlined into lzma_crcxx(). Previously a jump to the extern lzma_crcxx_clmul() was needed. Notes about shared liblzma on ELF platforms: - On platforms that support ifunc and -fvisibility=hidden, this was silly because CLMUL-only build would have that single extra jump instruction of extra overhead. - On platforms that support neither -fvisibility=hidden nor linker version script (liblzma*.map), jumping to lzma_crcxx_clmul() would go via PLT so a few more instructions of overhead (still not a big issue but silly nevertheless). There was a downside with static liblzma too: if an application only needs lzma_crc64(), static linking would make the linker include the CLMUL code for both CRC32 and CRC64 from crc_x86_clmul.o even though the CRC32 code wouldn't be needed, thus increasing code size of the executable (assuming that -ffunction-sections isn't used). Also, now compilers are likely to inline crc_simd_body() even if they don't support the always_inline attribute (or MSVC's __forceinline). Quite possibly all compilers that build the code do support such an attribute. But now it likely isn't a problem even if the attribute wasn't supported. Now all x86-specific stuff is in crc_x86_clmul.h. If other archs The other archs can then have their own headers with their own is_clmul_supported() and crcxx_clmul(). Another bonus is that the build system doesn't need to care if crc_clmul.c is needed. is_clmul_supported() stays as inline function as it's not needed when doing a CLMUL-only build (avoids a warning about unused function).
2023-12-21CMake: Move sandbox detection outside of xz section.Jia Tan1-80/+98
The sandbox is now enabled for xzdec as well, so it no longer belongs in just the xz section. xz and xzdec are always built, except for older MSVC versions, so there isn't a need to conditionally show the sandbox configuration. CMake will do a little unecessary work on older MSVC versions that can't build xz or xzdec, but this is a very small downside.
2023-11-30CMake: Use consistent indentation with check_c_source_compiles().Jia Tan1-2/+2
2023-11-30CMake: Change __attribute__((__ifunc__())) detection.Jia Tan1-8/+45
This renames ALLOW_ATTR_IFUNC to USE_ATTR_IFUNC and applies the ifunc detection changes that were made to the Autotools build. Fixes: https://github.com/tukaani-project/xz/issues/70
2023-10-26CMake: Use -D_FILE_OFFSET_BITS=64 if (and only if) needed.Lasse Collin1-1/+6
A CMake option LARGE_FILE_SUPPORT is created if and only if -D_FILE_OFFSET_BITS=64 affects sizeof(off_t). This is needed on many 32-bit platforms and even with 64-bit builds with MinGW-w64 to get support for files larger than 2 GiB.
2023-10-26CMake: Generate and install liblzma.pc if not using MSVC.Lasse Collin1-0/+21
Autotools based build uses -pthread and thus adds it to Libs.private in liblzma.pc. CMake doesn't use -pthread at all if pthread functions are available in libc so Libs.private doesn't get -pthread either.
2023-10-26CMake: Rearrange the PACKAGE_ variables.Lasse Collin1-11/+15
The windres workaround now replaces spaces with \x20 so the package name isn't repeated. These changes will help with creation of liblzma.pc.
2023-10-26CMake: Create liblzma.def when building liblzma.dll with MinGW-w64.Lasse Collin1-0/+20
2023-10-26CMake: Change one CMAKE_CURRENT_SOURCE_DIR to CMAKE_CURRENT_LIST_DIR.Lasse Collin1-1/+1
In this case they have identical values.
2023-10-26CMake/Windows: Fix the import library filename.Lasse Collin1-0/+1
Both PREFIX and IMPORT_PERFIX have to be set to "" to get liblzma.dll and liblzma.dll.a.
2023-10-25Build: Detect -fsanitize= in CFLAGS and incompatible build options.Lasse Collin1-0/+29
Now configure will fail if -fsanitize= is found in CFLAGS and sanitizer-incompatible ifunc or Landlock sandboxing would be used. These are incompatible with one or more sanitizers. It's simpler to reject all -fsanitize= uses instead of trying to pass those that might not cause problems. CMake-based build was updated similarly. It lets the configuration finish (SEND_ERROR instead of FATAL_ERROR) so that both error messages can be seen at once.
2023-10-22CMake: Don't shadow the cache entry ENABLE_THREADS with a normal variable.Lasse Collin1-3/+7
Using set(ENABLE_THREADS "posix") is confusing because it sets a new normal variable and leaves the cache entry with the same name unchanged. The intent wasn't to change the cache entry so this switches to a different variable name.
2023-10-22xz: Support basic sandboxing with Linux Landlock (ABI versions 1-3).Lasse Collin1-1/+11
It is enabled only when decompressing one file to stdout, similar to how Capsicum is used. Landlock was added in Linux 5.13.
2023-10-22CMake: Edit threading related messages.Lasse Collin1-9/+10
It's mostly to change from "thread method" to "threading method".
2023-10-22CMake: Use FATAL_ERROR if user-supplied options aren't understood.Lasse Collin1-14/+14
This way typos are caught quickly and compounding error messages are avoided (a single typo could cause more than one error). This keeps using SEND_ERROR when the system is lacking a feature (like threading library or sandboxing method). This way the whole configuration log will be generated in case someone wishes to report a problem upstream.
2023-10-22CMake: Add sandboxing support.Lasse Collin1-1/+49
2023-10-22CMake: Check for clock_gettime() even on Windows.Lasse Collin1-23/+21
This mirrors configure.ac although currently MinGW-w64 builds don't use clock_gettime() even if it is found.
2023-10-19CMake: Add ALLOW_CLMUL_CRC option to enable/disable CLMUL.Jia Tan1-19/+25
The option is enabled by default, but will only be visible to a user listing cache variables or using a CMake GUI application if the immintrin.h header file is found. This mirrors our Autotools build --disable-clmul-crc functionality.
2023-10-18liblzma: Create crc_clmul.c.Jia Tan1-1/+5
Both crc32_clmul() and crc64_clmul() are now exported from crc32_clmul.c as lzma_crc32_clmul() and lzma_crc64_clmul(). This ensures that is_clmul_supported() (now lzma_is_clmul_supported()) is not duplicated between crc32_fast.c and crc64_fast.c. Also, it encapsulates the complexity of the CLMUL implementations into a single file and reduces the complexity of crc32_fast.c and crc64_fast.c. Before, CLMUL code was present in crc32_fast.c, crc64_fast.c, and crc_common.h. During the conversion, various cleanups were applied to code (thanks to Lasse Collin) including: - Require using semicolons with MASK_/L/H/LH macros. - Variable typing and const handling improvements. - Improvements to comments. - Fixes to the pragmas used. - Removed unneeded variables. - Whitespace improvements. - Fixed CRC_USE_GENERIC_FOR_SMALL_INPUTS handling. - Silenced warnings and removed the need for some #pragmas
2023-10-13liblzma: Rename crc_macros.h to crc_common.h.Hans Jansen1-1/+1
2023-10-06CMake/Windows: Fix when the windres workaround is applied.Lasse Collin1-3/+3
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". Thanks to Martin Storsjö. https://github.com/tukaani-project/xz/commit/0570308ddd9c0e39e85597ebc0e31d4fc81d436f#commitcomment-129098431
2023-09-29CMake: Rename xz and man page symlink custom targets.Jia Tan1-3/+3
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.
2023-09-29CMake: Specify LINKER_LANGUAGE for libgnu target to fix Ninja Generator.Jia Tan1-0/+6
CMake is unable to guess the linker language for just a header file so it must be explicitly set.
2023-09-27CMake: Fix Windows build with Clang/LLVM 17.Lasse Collin1-12/+14
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: https://github.com/llvm/llvm-project/commit/2bcc0fdc58a220cb9921b47ec8a32c85f2511a47
2023-09-26Build: Fix __attribute__((ifunc(...))) detection with clang -Wall.Lasse Collin1-0/+8
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.
2023-09-26CMake: Remove accidental extra newline.Jia Tan1-1/+0
2023-09-26CMake: Remove /lib from tests include path.Jia Tan1-1/+0
The tests never included anything from /lib, so this was not needed.
2023-09-26CMake: Add /lib to include path.Jia Tan1-0/+5
2023-09-24CMake: Update libgnu target with new header files.Jia Tan1-0/+5
2023-09-22CMake: Wrap two overlong lines that are possible to wrap.Lasse Collin1-2/+4
2023-09-22CMake: Add a comment about threads on Cygwin.Lasse Collin1-0/+1
2023-09-22CMake: Require VS2015 or later for building xzdec.Lasse Collin1-1/+1
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.
2023-09-22CMake: Allow building xz with Visual Studio 2015 and later.Lasse Collin1-1/+1
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.
2023-09-22CMake: Add support for replacement getopt_long (lib/getopt*).Lasse Collin1-7/+47
Thanks to Jia Tan for the initial work. I added the libgnu target and made a few related minor edits.
2023-09-22CMake: Bump maximum policy version to 3.27.Lasse Collin1-1/+1
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.
2023-09-12CMake: Fix time.h checks not running on second CMake run.Jia Tan1-8/+10
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.
2023-09-12CMake: Fix unconditionally defining HAVE_CLOCK_MONOTONIC.Jia Tan1-5/+3
If HAVE_CLOCK_GETTIME was defined, then HAVE_CLOCK_MONOTONIC was always added as a compile definition even if the check for it failed.
2023-08-14CMake: Conditionally allow win95 threads and --enable-small.Jia Tan1-8/+20
2023-07-31Docs: Fix typos found by codespellDimitri Papadopoulos Orfanos1-2/+2
2023-07-28CMake: Conditionally allow the creation of broken symlinks.Jia Tan1-7/+75
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. The default for MSYS2 does not allow for broken symlinks, so the CMake build has been broken for MSYS2 since commit 80a1a8bb838842a2be343bd88ad1462c21c5e2c9.
2023-06-27Minor tweaks to style and comments.Lasse Collin1-4/+4
2023-06-27CMake: Rename CHECK_ATTR_IFUNC to ALLOW_ATTR_IFUNC.Lasse Collin1-3/+3
It's so that there's a clear difference in wording compared to liblzma's integrity check types.
2023-06-27Add ifunc check to CMakeLists.txtHans Jansen1-0/+19
CMake build system will now verify if __attribute__((__ifunc__())) can be used in the build system. If so, HAVE_FUNC_ATTRIBUTE_IFUNC will be defined to 1.
2023-06-06CMake: Protects against double find_packageBenjamin Buch1-7/+9
Boost iostream uses `find_package` in quiet mode and then again uses `find_package` with required. This second call triggers a `add_library cannot create imported target "ZLIB::ZLIB" because another target with the same name already exists.` This can simply be fixed by skipping the alias part on secondary `find_package` runs.
2023-03-29CMake: Update liblzma-config.cmake generation.Jia Tan1-11/+22
Now that the threading is configurable, the liblzma CMake package only needs the threading library when using POSIX threads.
2023-03-29CMake: Allows setting thread method.Jia Tan1-40/+104
The thread method is now configurable for the CMake build. It matches the Autotools build by allowing ON (pick the best threading method), OFF (no threading), posix, win95, and vista. If both Windows and posix threading are both available, then ON will choose Windows threading. Windows threading will also not use: target_link_libraries(liblzma Threads::Threads) since on systems like MinGW-w64 it would link the posix threads without purpose.
2023-03-24CMake: Only build xzdec if decoders are enabled.Jia Tan1-1/+1
2023-03-23CMake: Bump maximum policy version to 3.26.Lasse Collin1-1/+1
It adds only one new policy related to FOLDERS which we don't use. This makes it clear that the code is compatible with the policies up to 3.26.
2023-03-23CMake: Conditionally build xz list.* files if decoders are enabled.Jia Tan1-2/+7
2023-03-23CMake: Allow configuring features as cache variables.Jia Tan1-137/+391
This allows users to change the features they build either in CMakeCache.txt or by using a CMake GUI. The sources built for liblzma are affected by this too, so only the necessary files will be compiled.
2023-03-18CMake: Fix typo in a comment.Jia Tan1-1/+1
2023-03-17CMake: Add microlzma_*.c to the build.Lasse Collin1-0/+2
These should have been included in 5.3.2alpha already.
2023-02-27CMake: Require that the C compiler supports C99 or a newer standard.Lasse Collin1-0/+8
Thanks to autoantwort for reporting the issue and suggesting a different patch: https://github.com/tukaani-project/xz/pull/42
2023-02-22CMake: Add LZIP decoder test to list of tests.Jia Tan1-0/+1
2023-02-04Build: Adjust CMake version search regex.Jia Tan1-0/+2
Now, the LZMA_VERSION_MAJOR, LZMA_VERSION_MINOR, and LZMA_VERSION_PATCH macros do not need to be on consecutive lines in version.h. They can be separated by more whitespace, comments, or even other content, as long as they appear in the proper order (major, minor, patch).
2023-02-03Tests: Create test_filter_str.c.Jia Tan1-0/+1
Tests lzma_str_to_filters(), lzma_str_from_filters(), and lzma_str_list_filters() API functions.
2023-01-10CMake: Fix appending to CMAKE_RC_FLAGS.Lasse Collin1-1/+1
It's a string, not a list. It only worked when the variable was empty. Thanks to Iouri Kharon.
2023-01-09CMake: Fix windres issues again.Lasse Collin1-12/+23
At least on some systems, GNU windres needs --use-temp-file in addition to the \x20 hack to avoid spaces in the command line argument. Hovever, that \x20 syntax is broken with llvm-windres version 15.0.0 (results in "XZx20Utils") but luckily it works with a regular space. Thus it is best to limit the workarounds to GNU toolchain on Windows.
2023-01-09CMake: Fix a copypaste error in xzdec Windows resource file handling.Lasse Collin1-2/+2
It was my mistake. Thanks to Iouri Kharon for the bug report.
2023-01-08CMake: Update cmake_minimum_required from 3.13...3.16 to 3.13...3.25.Lasse Collin1-1/+1
The changes listed on cmake-policies(7) for versions 3.17 to 3.25 shouldn't affect this project.
2023-01-08CMake/Windows: Add resource files to xz.exe and xzdec.exe.Lasse Collin1-0/+16
The command line tools cannot be built with MSVC for now but they can be built with MinGW-w64. Thanks to Iouri Kharon for the bug report and the original patch.
2023-01-08CMake/Windows: Add a workaround for windres from GNU binutils.Lasse Collin1-1/+20
Thanks to Iouri Kharon for the bug report and the original patch.
2023-01-08Build: Require that _mm_set_epi64x() is usable to enable CLMUL support.Lasse Collin1-1/+2
VS2013 doesn't have _mm_set_epi64x() so this way CLMUL gets disabled with VS2013. Thanks to Iouri Kharon for the bug report.
2023-01-02Tests: Creates test_index_hash.cJia Tan1-0/+2
Tests all API functions exported from index_hash.h. Does not have a dedicated test for lzma_index_hash_end.
2022-12-30Build: No longer require HAVE_DECL_CLOCK_MONOTONIC to always be set.Jia Tan1-5/+3
Previously, if threading was enabled HAVE_DECL_CLOCK_MONOTONIC would always be set to 0 or 1. However, this macro was needed in xz so if xz was not built with threading and HAVE_DECL_CLOCK_MONOTONIC was not defined but HAVE_CLOCK_GETTIME was, it caused a warning during build. Now, HAVE_DECL_CLOCK_MONOTONIC has been renamed to HAVE_CLOCK_MONOTONIC and will only be set if it is 1.
2022-11-30Change the bug report address.Lasse Collin1-1/+1
It forwards to me and Jia Tan. Also update the IRC reference in README as #tukaani was moved to Libera Chat long ago.
2022-11-30Build: Add string_conversion.c to CMake, DOS, and VS files.Lasse Collin1-0/+1
2022-11-24Build: Don't put GNU/Linux-specific symbol versions into static liblzma.Lasse Collin1-1/+4
It not only makes no sense to put symbol versions into a static library but it can also cause breakage. By default Libtool #defines PIC if building a shared library and doesn't define it for static libraries. This is documented in the Libtool manual. It can be overriden using --with-pic or --without-pic. configure.ac detects if --with-pic or --without-pic is used and then gives an error if neither --disable-shared nor --disable-static was used at the same time. Thus, in normal situations it works to build both shared and static library at the same time on GNU/Linux, only --with-pic or --without-pic requires that only one type of library is built. Thanks to John Paul Adrian Glaubitz from Debian for reporting the problem that occurred on ia64: https://www.mail-archive.com/xz-devel@tukaani.org/msg00610.html
2022-11-24CMake: Don't use symbol versioning with static library.Lasse Collin1-3/+7
2022-11-19CMake: Adds test_memlimit to CMake testsJia Tan1-0/+1
2022-11-14liblzma: Add fast CRC64 for 32/64-bit x86 using SSSE3 + SSE4.1 + CLMUL.Lasse Collin1-2/+24
It also works on E2K as it supports these intrinsics. On x86-64 runtime detection is used so the code keeps working on older processors too. A CLMUL-only build can be done by using -msse4.1 -mpclmul in CFLAGS and this will reduce the library size since the generic implementation and its 8 KiB lookup table will be omitted. On 32-bit x86 this isn't used by default for now because by default on 32-bit x86 the separate assembly file crc64_x86.S is used. If --disable-assembler is used then this new CLMUL code is used the same way as on 64-bit x86. However, a CLMUL-only build (-msse4.1 -mpclmul) won't omit the 8 KiB lookup table on 32-bit x86 due to a currently-missing check for disabled assembler usage. The configure.ac check should be such that the code won't be built if something in the toolchain doesn't support it but --disable-clmul-crc option can be used to unconditionally disable this feature. CLMUL speeds up decompression of files that have compressed very well (assuming CRC64 is used as a check type). It is know that the CLMUL code is significantly slower than the generic code for tiny inputs (especially 1-8 bytes but up to 16 bytes). If that is a real-world problem then there is already a commented-out variant that uses the generic version for small inputs. Thanks to Ilya Kurdyukov for the original patch which was derived from a white paper from Intel [1] (published in 2009) and public domain code from [2] (released in 2016). [1] https://www.intel.com/content/dam/www/public/us/en/documents/white-papers/fast-crc-computation-generic-polynomials-pclmulqdq-paper.pdf [2] https://github.com/rawrunprotected/crc
2022-11-14liblzma: Use __attribute__((__constructor__)) if available.Lasse Collin1-0/+15
This uses it for CRC table initializations when using --disable-small. It avoids mythread_once() overhead. It also means that then --disable-small --disable-threads is thread-safe if this attribute is supported.
2022-11-09CMake: Add lzip decoder files and #define to the build.Lasse Collin1-0/+3
2022-09-19liblzma: Add experimental ARM64 BCJ filter with a temporary Filter ID.Lasse Collin1-0/+3
That is, the Filter ID will be changed once the design is final. The current version will be removed. So files created with the tempoary Filter ID won't be supported in the future.
2022-09-08CMake: Clarify a comment about Windows symlinks without file extension.Jia Tan1-4/+3
2022-09-08CMake: Update for liblzma_*.map files and fix wrong common_w32res.rc dep.Lasse Collin1-5/+19
The previous commit split liblzma.map into liblzma_linux.map and liblzma_generic.map. This commit updates the CMake build for those. common_w32res.rc dependency was listed under Linux/FreeBSD while obviously it belongs to Windows when building a DLL.
2022-08-31CMake: Add xz symlinks.Lasse Collin1-1/+37
These are a minor thing especially since the xz build has some real problems still like lack of large file support on 32-bit systems but I'll commit this since the code exists. Thanks to Jia Tan.
2022-08-31CMake: Put xz man page install under if(UNIX) like is for xzdec.Lasse Collin1-3/+5
Thanks to Jia Tan.
2022-08-22CMake: Add liblzma tests.Lasse Collin1-1/+52
Thanks to Jia Tan for the patch.
2022-07-19CMake: Add missing source file to liblzma buildNicholas Jackson1-0/+1
2022-02-06CMake: Keep compatible with Windows 95 for 32-bit build.huangqinjin1-1/+11
2021-02-13CMake: Use interface library for better FindLibLZMA compatibility.Lasse Collin1-2/+9
https://www.mail-archive.com/xz-devel@tukaani.org/msg00446.html Thanks to Markus Rickert.
2021-01-30CMake: Try to improve compatibility with the FindLibLZMA module.Lasse Collin1-8/+13
The naming conflict with FindLibLZMA module gets worse. Not avoiding it in the first place was stupid. Normally find_package(LibLZMA) will use the module and find_package(liblzma 5.2.5 REQUIRED CONFIG) will use the config file even with a case insensitive file system. However, if CMAKE_FIND_PACKAGE_PREFER_CONFIG is TRUE and the file system is case insensitive, find_package(LibLZMA) will find our liblzma config file instead of using FindLibLZMA module. One big problem with this is that FindLibLZMA uses LibLZMA::LibLZMA and we use liblzma::liblzma as the target name. With target names CMake happens to be case sensitive. To workaround this, this commit adds add_library(LibLZMA::LibLZMA ALIAS liblzma::liblzma) to the config file. Then both spellings work. To make the behavior consistent between case sensitive and insensitive file systems, the config and related files are renamed from liblzmaConfig.cmake to liblzma-config.cmake style. With this style CMake looks for lowercase version of the package name so find_package(LiBLzmA 5.2.5 REQUIRED CONFIG) will work to find our config file. There are other differences between our config file and FindLibLZMA so it's still possible that things break for reasons other than the spelling of the target name. Hopefully those situations aren't too common. When the config file is available, it should always give as good or better results as FindLibLZMA so this commit doesn't affect the recommendation to use find_package(liblzma 5.2.5 REQUIRED CONFIG) which explicitly avoids FindLibLZMA. Thanks to Markus Rickert.
2020-12-16Build: Don't build bundles on Apple OSes.Lasse Collin1-0/+3
Thanks to Daniel Packard.
2020-11-17CMake: Fix compatibility with CMake 3.13.Lasse Collin1-1/+1
The syntax "if(DEFINED CACHE{FOO})" requires CMake 3.14. In some other places the code treats the cache variables like normal variables already (${FOO} or if(FOO) is used, not ${CACHE{FOO}). Thanks to ygrek for reporting the bug on IRC.
2020-02-27Build: Make CMake build fail if tuklib_cpucores or tuklib_physmem fails.Lasse Collin1-0/+18
2020-02-25Build: Fix bugs in the CMake files.Lasse Collin1-26/+26
Seems that the phrase "add more quotes" from sh/bash scripting applies to CMake as well. E.g. passing an unquoted list ${FOO} to a function that expects one argument results in only the first element of the list being passed as an argument and the rest get ignored. Adding quotes helps ("${FOO}"). list(INSERT ...) is weird. Inserting an empty string to an empty variable results in empty list, but inserting it to a non-empty variable does insert an empty element to the list. Since INSERT requires at least one element, "${CMAKE_THREAD_LIBS_INIT}" needs to be quoted in CMakeLists.txt. It might result in an empty element in the list. It seems to not matter as empty elements consistently get ignored in that variable. In fact, calling cmake_check_push_state() and cmake_check_pop_state() will strip the empty elements from CMAKE_REQUIRED_LIBRARIES! In addition to quoting fixes, this fixes checks for the cache variables in tuklib_cpucores.cmake and tuklib_physmem.cmake. Thanks to Martin Matuška for testing and reporting the problems. These fixes aren't tested yet but hopefully they soon will be.
2020-02-25Build: Add very limited experimental CMake support.Lasse Collin1-0/+643
This does *NOT* replace the Autotools-based build system in the foreseeable future. See the comment in the beginning of CMakeLists.txt. So far this has been tested only on GNU/Linux but I commit it anyway to make it easier for others to test. Since I haven't played much with CMake before, it's likely that there are things that have been done in a silly or wrong way and need to be fixed.
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