LDMD2(1)

💖 LDMD2(1) 💖

okay bestie, deep breath, because this is THE page: LDMD2 💅 it's the LLVM D Compiler — specifically the DMD-compatible driver — and the manual name is literally LDMD2(1), right there in the header, no cap. Grab a snack 🍓, this one's long, and we're only on part 1.

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🌸 NAME 🌸

LDMD2 — LLVM D Compiler (DMD-compatible driver) ✨

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🦋 DESCRIPTION 🦋

👑 It's LDC, bestie (the LLVM D compiler, 1.42.0)

So the whole vibe is this: LDC - the LLVM D compiler (1.42.0):

based on DMD v2.112.1 and LLVM 19.1.7 built with LDC - the LLVM D compiler (1.42.0) Default target: x86_64-pc-linux-gnu Host CPU: skylake https://dlang.org - https://wiki.dlang.org/LDC

translation: it's built on DMD v2.112.1 and LLVM 19.1.7, compiled with LDC - the LLVM D compiler (1.42.0), targeting x86_64-pc-linux-gnu by default, running on a skylake host CPU. the links are https://dlang.org and https://wiki.dlang.org/LDC — go look, they're right there 🫶

🎯 Registered Targets

these are all the targets it's registered for, and yes you're gonna read every single one, periodt:

• aarch64 — AArch64 (little endian)
• aarch64_32 — AArch64 (little endian ILP32)
• aarch64_be — AArch64 (big endian)
• amdgcn — AMD GCN GPUs
• arm — ARM
• arm64 — ARM64 (little endian)
• arm64_32 — ARM64 (little endian ILP32)
• armeb — ARM (big endian)
• avr — Atmel AVR Microcontroller
• bpf — BPF (host endian)
• bpfeb — BPF (big endian)
• bpfel — BPF (little endian)
• hexagon — Hexagon
• lanai — Lanai
• loongarch32 — 32-bit LoongArch
• loongarch64 — 64-bit LoongArch
• m68k — Motorola 68000 family
• mips — MIPS (32-bit big endian)
• mips64 — MIPS (64-bit big endian)
• mips64el — MIPS (64-bit little endian)
• mipsel — MIPS (32-bit little endian)
• msp430 — MSP430 [experimental]
• nvptx — NVIDIA PTX 32-bit
• nvptx64 — NVIDIA PTX 64-bit
• ppc32 — PowerPC 32
• ppc32le — PowerPC 32 LE
• ppc64 — PowerPC 64
• ppc64le — PowerPC 64 LE
• r600 — AMD GPUs HD2XXX-HD6XXX
• riscv32 — 32-bit RISC-V
• riscv64 — 64-bit RISC-V
• sparc — Sparc
• sparcel — Sparc LE
• sparcv9 — Sparc V9
• systemz — SystemZ
• thumb — Thumb
• thumbeb — Thumb (big endian)
• ve — VE
• wasm32 — WebAssembly 32-bit
• wasm64 — WebAssembly 64-bit
• x86 — 32-bit X86: Pentium-Pro and above
• x86-64 — 64-bit X86: EM64T and AMD64
• xcore — XCore
• xtensa — Xtensa 32

🐚 Usage

here's the shape of it, bestie:

ldmd2 [<option>...] <file>...
ldmd2 [<option>...] -run <file> [<arg>...]

Where:

• <file> — a D source file
• <arg> — Argument to pass when running the resulting program

💅 The <option> Menu 💅

every single flag. all of them. i am not skipping a one 🫡

• @<cmdfile> — read arguments from cmdfile, so you don't have to type them all yourself
• -allinst — generate code for all template instantiations
• -betterC — omit generating some runtime information and helper functions
• -boundscheck=[on|safeonly|off] — bounds checks on, in @safe only, or off — pick one 🎀
• -c — compile only, do not link
• -check=[assert|bounds|in|invariant|out|switch][=[on|off]] — enable or disable specific checks
• -checkaction=[D|C|halt|context] — behavior on assert/boundscheck/finalswitch failure
• -color — turn colored console output on 🌈
• -color=[on|off|auto] — force colored console output on or off, or only when not redirected (default)
• -conf=<filename> — use config file at filename
• -cov — do code coverage analysis
• -cov=ctfe — include code executed during CTFE in coverage report
• -cov=<nnn> — require at least nnn% code coverage
• -D — generate documentation
• -Dd<directory> — write documentation file to directory
• -Df<filename> — write documentation file to filename
• -d — silently allow deprecated features and symbols
• -de — issue an error when deprecated features or symbols are used (halt compilation)
• -dw — issue a message when deprecated features or symbols are used (default)
• -debug — compile in debug code
• -debug=<level> — compile in debug code <= level
• -debug=<ident> — compile in debug code identified by ident
• -debuglib=<name> — set symbolic debug library to name
• -defaultlib=<name> — set default library to name
• -deps — print module dependencies (imports/file/version/debug/lib)
• -deps=<filename> — write module dependencies to filename (only imports)
• -dllimport=<value> — Windows only: select symbols to dllimport (none/defaultLibsOnly/externalOnly/all)
• -edition[=<NNNN>[<filename>]] — set language edition to edition year, apply to <filename>
• -extern-std=<standard> — set C++ name mangling compatibility with standard
• -fIBT — generate Indirect Branch Tracking code
• -fPIC — generate position independent code
• -ftime-trace — turn on compile time profiler, generate JSON file with results
• -ftime-trace-granularity= — minimum time granularity (in microseconds) traced by time profiler (default: 500)
• -ftime-trace-file=<filename> — specify output file for -ftime-trace
• -g — add symbolic debug info
• -gdwarf=<version> — add DWARF symbolic debug info
• -gf — emit debug info for all referenced types
• -gs — always emit stack frame
• -H — generate 'header' file
• -Hd=<directory> — write 'header' file to directory
• -Hf=<filename> — write 'header' file to filename
• -HC[=[silent|verbose]] — write C++ 'header' equivalent to stdout
• -HCd=<directory> — write C++ 'header' file to directory
• -HCf=<filename> — write C++ 'header' file to filename instead of stdout
• --help — print help and exit
• -I=<directory> — look for imports also in directory
• -extI=<directory> — look for imports that are out of the currently compiling binary, used to set the module as DllImport
• -i[=<pattern>] — include imported modules in the compilation
• -identifiers=<table> — specify the non-ASCII tables for D identifiers
• -identifiers-importc=<table> — specify the non-ASCII tables for ImportC identifiers
• -ignore — deprecated flag, unsupported pragmas are always ignored now
• -inline — do function inlining
• -J=<directory> — look for string imports also in directory
• -L=<linkerflag> — pass linkerflag to link
• -lib — generate library rather than object files
• -lowmem — enable garbage collection for the compiler
• -m32 — generate 32 bit code
• -m64 — generate 64 bit code
• -main — add default main() if not present already (e.g. for unittesting)
• -makedeps[=<filename>] — print dependencies in Makefile compatible format to filename or stdout
• -man — open web browser on manual page
• -mcpu=<id> — generate instructions for architecture identified by 'id'
• -mcpu=[h|help|?] — list all architecture options
• -mixin=<filename> — expand and save mixins to file specified by <filename>
• -mscrtlib=<libname> — MS C runtime library to reference from main/WinMain/DllMain
• -mv=<package.module>=<filespec> — use <filespec> as source file for <package.module>
• -noboundscheck — no array bounds checking (deprecated, use -boundscheck=off)
• -nothrow — assume no Exceptions will be thrown
• -O — optimize 🔥
• -o- — do not write object file
• -od=<directory> — write object & library files to directory
• -of=<filename> — name output file to filename
• -op — preserve source path for output files
• -oq — write object files with fully qualified file names
• -P=<preprocessorflag> — pass preprocessorflag to C preprocessor
• -preview=<name> — enable an upcoming language change identified by 'name'
• -preview=[h|help|?] — list all upcoming language changes
• -profile — profile runtime performance of generated code
• -release — contracts and asserts are not emitted, and bounds checking is performed only in @safe functions
• -revert=<name> — revert language change identified by 'name'
• -revert=[h|help|?] — list all revertable language changes
• -run <srcfile> — compile, link, and run the program srcfile
• -shared — generate shared library (DLL)
• -target=<triple> — use <triple> as <arch>-[<vendor>-]<os>[-<cenv>[-<cppenv]]
• -transition=<name> — help with language change identified by 'name'
• -transition=[h|help|?] — list all language changes
• -unittest — compile in unit tests
• -v — verbose 👀
• -vasm — generate additional textual assembly files (.s)
• -vcolumns — print character (column) numbers in diagnostics
• -vdmd — print the underlying LDC command line
• -verror-style=[digitalmars|gnu|sarif] — set the style for file/line number annotations on compiler messages
• -verror-supplements=<num> — limit the number of supplemental messages for each error (0 means unlimited)
• -verrors=<num> — limit the number of error/deprecation messages (0 means unlimited)
• -verrors=[context|simple] — set the verbosity of error messages
• -verrors=spec — show errors from speculative compiles such as __traits(compiles,...)
• --version — print compiler version and exit
• -version=<level> — compile in version code >= level
• -version=<ident> — compile in version code identified by ident
• -vgc — list all gc allocations including hidden ones
• -visibility=<value> — default visibility of symbols (default/hidden/public)
• -vtemplates=[list-instances] — list statistics on template instantiations
• -vtls — list all variables going into thread local storage
• -w — warnings as errors (compilation will halt) 💀
• -wi — warnings as messages (compilation will continue)
• -X — generate JSON file
• -Xf=<filename> — write JSON file to filename
• -Xcc=<driverflag> — pass driverflag to linker driver (cc)

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and then, bestie, the page does the thing where it repeats itself 🌀 — here it comes again, same energy, same words:

based on DMD v2.112.1 and LLVM 19.1.7 built with LDC - the LLVM D compiler (1.42.0) Default target: x86_64-pc-linux-gnu Host CPU: skylake https://dlang.org - https://wiki.dlang.org/LDC

🎯 Registered Targets

• aarch64 — AArch64 (little endian)
• aarch64_32 — AArch64 (little endian ILP32)
• aarch64_be — AArch64 (big endian)
• amdgcn — AMD GCN GPUs
• arm — ARM
• arm64 — ARM64 (little endian)
• arm64_32 — ARM64 (little endian ILP32)
• armeb — ARM (big endian)
• avr — Atmel AVR Microcontroller
• bpf — BPF (host endian)
• bpfeb — BPF (big endian)
• bpfel — BPF (little endian)
• hexagon — Hexagon
• lanai — Lanai

...and that's exactly where part 1 cuts off mid-target-list 😭 so don't you dare go anywhere, there's more, we are NOT done 🫶

…and bestie, the target roster just keeps going, so here's every single one, no skips, no edits, exactly as the compiler spells them ✨

• loongarch32 — 32-bit LoongArch
• loongarch64 — 64-bit LoongArch
• m68k — the Motorola 68000 family, a certified vintage icon 🕰️
• mips — MIPS, 32-bit, big endian
• mips64 — MIPS, 64-bit, big endian
• mips64el — MIPS, 64-bit, little endian
• mipsel — MIPS, 32-bit, little endian
• msp430 — MSP430, marked [experimental] so pls hold its hand 🙈
• nvptx — NVIDIA PTX, 32-bit
• nvptx64 — NVIDIA PTX, 64-bit
• ppc32 — PowerPC 32
• ppc32le — PowerPC 32 LE
• ppc64 — PowerPC 64
• ppc64le — PowerPC 64 LE
• r600 — AMD GPUs, HD2XXX–HD6XXX
• riscv32 — 32-bit RISC-V
• riscv64 — 64-bit RISC-V
• sparc — Sparc
• sparcel — Sparc LE
• sparcv9 — Sparc V9
• systemz — SystemZ
• thumb — Thumb
• thumbeb — Thumb, big endian
• ve — VE
• wasm32 — WebAssembly, 32-bit
• wasm64 — WebAssembly, 64-bit
• x86 — 32-bit X86: Pentium-Pro and above
• x86-64 — 64-bit X86: EM64T and AMD64
• xcore — XCore
• xtensa — Xtensa 32

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And that's the whole vibe check, bestie — every architecture present and accounted for, not one of them ghosted 💅

That's a wrap on this page. The version stamped at the bottom is LDC 1.42.0, it's dated June 2026, and the whole thing lives in manual section LDMD2(1) — so if you need to cite it, that's your receipt 🧾💖 Go forth and compile something iconic, you absolute main character 🫶🌈