On Friday, January 19, 2018 06:53:16 Rel via Digitalmars-d wrote: > On Wednesday, 17 January 2018 at 12:31:35 UTC, Kagamin wrote: > > https://wiki.dlang.org/Build_D_for_Android > > https://wiki.dlang.org/Building_LDC_runtime_libraries > > https://github.com/ldc-developers/ldc/pull/2142#issuecomment-304472412 > > As far as I understand I will need a C toolchain that > allows cross-compilation to target OS in order to build > runtime libraries, is it correct? Why is D's runtime library > is written in C? I thought that D is pretty much capable to > have runtime libraries written in D, especially after the > introduction of -betterC flag.
D's runtime is not written in C. It's written in D. However, the C linker is used to link, and by default, it's used by calling the C/C++ compiler (at least, that's what dmd does). ldc would be using LLVM's linker and possibly using it through clang. However, D's runtime does _call_ into various C functions, because they're part of the OS' API, and that means that D is ultimately using the C runtime in addition to its own. So, C is also used in that way even though none of D's runtime is written in C. - Jonathan M Davis
