The `-Wl,-z,noexecstack` and `-Wa,--noexecstack` flags are already set for CMake, but not for Meson.
This brings the flags to the Meson build as well. Note that this maintains the discrepancy in behavior
between CMake and Meson when it comes to enabling ASM: on CMake, the ZSTD_HAS_NOEXECSTACK variable
is set and these flags added for GCC/Clang and MinGW. Then later, the ZSTD_HAS_NOEXECSTACK variable
is checked (along with some other conditions) to enable or disable ASM. However on Meson, this logic
is restricted to simply checking for GCC/Clang. This patch maintains this behavior; noexecstack is
dependent on GCC/Clang only.
Move towards a stronger guarantee of reproducibility by removing this small difference for machines without SSE2/Neon.
The SIMD behavior is now the default for all platforms.
Some older Android libc implementations don't support `fseeko` or `ftello`.
This commit adds a new compile-time macro `LIBC_NO_FSEEKO` as well as a usage in CMake for old Android APIs.
Do some include shuffling for `**.h` files within lib, programs, tests, and zlibWrapper.
`lib/legacy` and `lib/deprecated` are untouched.
`#include`s within `extern "C"` blocks in .cpp files are untouched.
todo: shuffling for `xxhash.h`
CMake warns on the current minimum requirement (3.5). Update to 3.10.
This means support is still available for the default on Ubuntu 18.04, which
exited LTS standard in April of 2023.
[draft]
Victor Zhang