ref.: https://x.com/MisterTechBlog/status/1798918878350950840
**Note:** Currently, ldc2 compiler only for
riscv/arm/sim[ulator]. gdc and dmd need PR!
**Preview - qemu-armv7a:nsh**
```bash
$ qemu-system-arm -cpu cortex-a7 -nographic -M
virt,virtualization=off,gic-version=2 -net none -chardev
stdio,id=con,mux=on -serial chardev:con -mon
chardev=con,mode=readline -kernel nuttx
psci_detect: Detected PSCI v1.1
nx_start: Entry
uart_register: Registering /dev/console
uart_register: Registering /dev/ttyS1
work_start_highpri: Starting high-priority kernel worker thread(s)
nxtask_activate: hpwork pid=1,TCB=0x4013b2d8
nx_start_application: Starting init thread
task_spawn: name=nsh_main entry=0x4010b18c file_actions=0
attr=0x4013afbc argv=0x4013afb8
nxtask_activate: nsh_main pid=2,TCB=0x4013c690
lib_cxx_initialize: _sinit: 0x4012c000 _einit: 0x4012c000
NuttShell (NSH) NuttX-12.5.1
nsh> nx_start: CPU0: Beginning Idle Loop
nsh> hello_d
task_spawn: name=hello_d entry=0x4011e824 file_actions=0x4013d8e4
attr=0x4013d8ec argv=0x4013d980
spawn_execattrs: Setting policy=2 priority=100 for pid=3
nxtask_activate: hello_d pid=3,TCB=0x4013dd80
Hello World, [cortex-a7]!
hello_d_main: Saying hello from the dynamically constructed
instance
DHelloWorld.HelloWorld: CONSTRUCTION FAILED!
hello_d_main: Saying hello from the instance constructed on the
stack
DHelloWorld.HelloWorld: Hello, World!!
nxtask_exit: hello_d pid=3,TCB=0x4013dd80
```
