C++20 Hello World Module

readme.txt

https://github.com/steve-downey/module-hw/blob/master/main.cpp

hello.cpp

// hello.cpp
module;
#include <iostream>
#include <string_view>

export module smd.hello;

export namespace hello {
void hello(std::string_view name)
{
  std::cout << "Hello, " << name << "! \n";
}
}  // namespace hello

main.cpp

// main.cxx

import smd.hello;

int main()
{
  hello::hello("Steve");
}

Makefile

main : main.o hello.o
	g++-11 -o main main.o hello.o

main.o : main.cpp gcm.cache/smd.hello.gcm
	g++-11 -fPIC -fmodules-ts -std=c++20 -o main.o -c main.cpp

hello.o: hello.cpp
	g++-11 -fPIC -fmodules-ts -std=c++20 -o hello.o -c hello.cpp

gcm.cache/smd.hello.gcm:  hello.o
	@test -f $@ || rm -f $<
	@test -f $@ || $(MAKE) $<

clean:
	rm hello.o main.o gcm.cache/smd.hello.gcm

clean-gcm:
	rm gcm.cache/smd.hello.gcm

test:
	./main

all: main