CC from environment is used to initialize CMAKE_C_COMPILER so
setting CMAKE_C_COMPILER explicitly isn't needed.
The syntax in ci_build.bash was broken in case one wished to put
spaces in CC.
Prefix ARM64_RUNTIME_DETECTION with CRC_ and reorder it to be with
the other ARM64-specific lines. That macro isn't used outside this
file.
ARM64 CLMUL implementation doesn't exist yet and thus CRC64_ARM64_CLMUL
isn't used anywhere yet.
It's not ideal that the single-letter CRC utility macros are here
as they pollute the namespace of the LZ encoder files. Those could
be moved their own crc_macros.h like they were in 5.2.x but in practice
this is fine enough already.
LZ encoder needs lzma_crc32_table[0] but otherwise those tables
are private to the CRC code. In contrast, the other things in
check.h are needed in several places.
Now runtime detection of CLMUL support can pick between the CLMUL and
the generic assembly implementations. Whatever overhead this has for
builds that omit CLMUL completely isn't important because builds for
any non-ancient system is likely to include the CLMUL code too.
Handle the CRC tables in crcXX_fast.c files because now these files
are built even when assembly code is used.
If 32-bit x86 assembly is enabled then it will always be built even
if compiler flags were such that CLMUL would be allowed unconditionally.
That is, runtime detection will be used anyway. This keeps the build
rules simpler.
In LZ encoder, build and use lzma_lz_hash_table[256] if CLMUL CRC
is used without runtime detection. Previously this wasn't needed
because crc32_table.c included the lzma_crc32_table[][] in the build
unless encoder support had been disabled. Including an 8 KiB table
was silly when only 1 KiB is actually used. So now liblzma is 7 KiB
smaller if CLMUL is enabled without runtime detection.
It feels clearer this way, and when support for external SHA-256
is added, this will keep the order of the library detection the
same as in configure.ac (check for pthreads before libmd) although
it shouldn't matter in practice.
This simplifies things a little. Building liblzma with VS2013 probably
still worked but building the command line tools was not supported.
Microsoft ended support for VS2013 on 2024-04.
Make the available options and their behavior match
--enable-symbol-versions in configure.ac.
Don't enable symbol versions on Linux if not using glibc. Previously
the generic variant was selected on Microblaze or if using NVHPC
without checking that libc is glibc.
Leave the cache variable to "auto" or "yes" if that was specified
instead of setting it to the autodetected value by default. A downside
is that one cannot easily see which variant the autodetection code
has selected. The same applies to XZ_SANDBOX and XZ_THREADS though.
Also clarify that "yes" will fail if no threading support is found.
If no threading is wanted, it has to be disabled manually.
configure.ac doesn't behave this way at the moment. Instead it
assumes pthreads to be present if not targeting Windows. If pthreads
actually are missing, the build fails later.
The list was copied from configure.ac and should be kept in sync.
(Pretend that the deleted comment in CMakeLists.txt didn't exist.)
There is no need to add equivalent of --enable-werror as CMake >= 3.24
supports -DCMAKE_COMPILE_WARNING_AS_ERROR=ON.
This is for consistency with 4c81c9611f
where \040 has to be used because \0x20F gets interpret at three hex
digits. Octals escapes are never longer than three digits.
Now "crc32" is in the list too for completeness but it doesn't
actually have any effect. The description of the cache variable
says that "crc32 is always built" so it should be clear enough.
Update the description too.
It affects creation of not only the legacy lzma, unlzma, lzcat symlinks
but also lzgrep and other legacy names for the scripts. The last
LZMA Utils release was made in 2008 but these names are still used
in some places to handle .lzma files.
Lasse Collin