ldc-developers/ldc v1.42.0-beta1

LDC 1.42.0-beta1

on GitHub

Big news

• Frontend, druntime and Phobos are at version ~2.112.0, incl. new command-line options -extI, -dllimport=externalOnly and -edition. (#4949, #4962, #4988, #5029)
• Support for LLVM 21. Beware that we have seen misoptimizations for std.json at one point (not anymore). (#4950, #5033)
• New prebuilt package for Alpine Linux aarch64 with musl libc, analogous to the existing x86_64 package. (#4943)
• Breaking change for dcompute: The special @kernel UDA is now a function and requires parentheses as in @kernel() void foo(){}. Optionally you can provide launch dimensions, @kernel([2,4,8]), to specify to the compute runtime how the kernel is intended to be launched.
• ldc2.conf can now be a directory. All the files inside it, ordered naturally, will be concatenated and treated like a big config. (#4954)
  • Running ldc-build-runtime --installWithSuffix now includes installing a target-specific .conf file to that directory. (#4978)
• Breaking change for ldc2.conf cmake generation: The cmake build process now generates the ldc2.conf and ldc2_install.conf as directories. ldc2*.conf.in and ADDITIONAL_DEFAULT_LDC_SWITCHES have been removed, if you need to add switches check out makeConfSection in LdcConfig.cmake. (#4954)
• When cross-compiling, the fallback value for the (cross) C compiler will be picked based on some heuristics.
  The old behavior was to default to cc.
  As an example, when cross-compiling for aarch64-linux-gnu the compilers that are checked are:
  • aarch64-linux-gnu-gcc
  • aarch64-linux-gnu-clang
  • clang --target=aarch64-linux-gnu
• The prebuilt arm64/universal macOS packages additionally bundle the arm64 iOS-simulator libraries, for out-of-the-box cross-compilation support via e.g. -mtriple=arm64-apple-ios12.0-simulator. (#4974)

Platform support

• Supports LLVM 15 - 21.