- Update to 1.22.0:
Big news
* Frontend, druntime and Phobos are at version 2.092.1+.
(#3413, #3416, #3429, #3434, #3452, #3467) (new)
* AArch64: All known ABI issues have been fixed. C(++) interop should now be
on par with x86_64, and variadics usable with core.{vararg,stdc.stdarg}.
(#3421)
* Windows hosts: DMD's Visual C++ toolchain detection has been adopted. As
that's orders of magnitude faster than the previous method involving the MS
batch file, auto-detection has been enabled by default, so if you have a
non-ancient Visual C++ installation, it will now be used automatically for
linking. The environment setup has been reduced to the bare minimum
(LIB and PATH). (#3415)
* FreeBSD x64: CI with CirrusCI is now fully green and includes automated
prebuilt package generation. The package depends on the llvm ports package
and should currently work on FreeBSD 11-13. (#3453, #3464) (new)
* Link-time overridable @weak functions are now emulated for Windows targets
and work properly for ELF platforms. For ELF, LDC doesn't emit any COMDATs
anymore. (#3424)
* New ldc.gccbuiltins_{amdgcn,nvvm} for AMD GCN and NVIDIA PTX targets.
(#3411)
* druntime: Significant speed-up for core.math.ldexp. (#3440, #3446)
Platform support
* Supports LLVM 3.9 - 10.0.
Bug fixes
* Cross-module inlining (incl. pragma(inline, true)): Enable emission into
multiple object files. This may have a significant impact on performance
(incl. druntime/Phobos) when not using LTO. (#3126, #3442)
* Android: Fix TLS initialization regression (introduced in v1.21) and
potential alignment issues. Unfortunately, the ld.bfd linker is required
for our custom TLS emulation scheme, unless you're willing to use a custom
linker script. So -linker=bfd is the new default for Android targets.
(#3462) (new)
* Casting (static and dynamic) arrays to vectors now loads the data instead
of splatting the first element. (#3418, #3419)
* Fix return statements potentially accessing memory from destructed
temporaries. (#3426)
* Add proper support for -checkaction=halt. (#3430, #3431)
* druntime: Include core.stdcpp.* modules. (#3103, #3158)
* GCC-style asm: Add support for indirect input operands ("m"). (#3438)
* FreeBSD: Fix backtraces for optimized code by switching to external
libexecinfo. (#3108, #3453)
* FreeBSD: Fix C math related issues (incl. CTFE math issues) by bringing
core.stdc.{math,tgmath} up to speed. (dlang/druntime#3119)
* Fix ICE for captured parameters not passed on the LLVM level. (#3441)
* Convenience fixes for RISC-V and other exotic targets. (#3457, #3460) (new)
Internals
* When printing compile-time reals to hex strings (mangling, .di headers),
LDC now uses LLVM instead of the host C runtime, for proper and consistent
results. (#3410)
* One limitation for exotic hosts wrt. C long double precision has been
lifted. (#3414)
* For AVR targets, the compiler now predefines AVR and emits all TLS globals
as regular __gshared ones. (#3420)
* WebAssembly: New memory grow/size intrinsics. (ldc-developers/druntime#187)
(new)
* New -fno-plt option to avoid PLT external calls. (#3443)
* iOS/arm64 CI, running the debug druntime & Phobos unittests on an iPhone
6S. Thx Jacob for this tedious work! (#3379, #3450)
Known issues
* When building LDC, old LDC 0.17.*/ltsmaster host compilers miscompile LDC ≥
1.21, leading to potential segfaults of the built LDC. Ltsmaster can still
be used to bootstrap a first compiler and then let that compiler compile
itself. (#3354)
* Buggy older ld.bfd linker versions may wrongly strip out required symbols,
e.g., ModuleInfos (so that e.g. no module ctors/dtors are run). LDC
defaults to ld.gold on Linux.
* LDC does not zero the padding area of a real variable. This may lead to
wrong results if the padding area is also considered. See #770. Does not
apply to real members inside structs etc.