Install wasm for qt 5.15 on Apple M1

install-wasm-for-qt5.15-on-mac-m1.md

Install wasm for qt 5.15 on Apple M1

1. Install Docker for Apple M1

2. Pull docker image maukalinow/qtwasm_builder

   docker pull maukalinow/qtwasm_builder
   

3. Compile cpp file below and move the binary to /usr/local/bin/qtwasm

FINISHIED!

Simply run qtwasm in your project folder and wait, everything would be done for you.

qtwasm.cpp

#define EMSDK_CACHE_PATH "~/.emsdk_cache"
#define QT_VERSION_TAG "5.15_latest"

/* Date:		2021-04-10
 * Name:		qtwasm_shell
 * Author:		me@justin.education
 * License:		CC-BY-SA-4.0
 *				https://creativecommons.org/licenses/by-sa/4.0/
 * Notes:		The program works with docker image [maukalinow/qtwasm_builder],
 *				to provide a human friendly command line interface.
 */

#include <iostream>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
using namespace std;

#define MAX_PATH_LENGTH  512
#define ALLOC (char*)malloc(sizeof(char)*MAX_PATH_LENGTH)

void help(){
	cout<<"Welcome to qtwasm_shell."<<endl;
	cout<<"Usage: qtwasm [options] [path]"<<endl<<endl;
	cout<<"-i, --input \t\t to specify source path, default is current path"<<endl;
	cout<<"-o, --output \t\t to specify build path, default is {src}/build"<<endl;
	cout<<"-h, --help \t\t to display this help"<<endl;
}

void exec(char* src, char* dest){
	cout<<"Source folder: \t"<<src<<endl;
	cout<<"Build folder: \t"<<dest<<endl;

	char *buffer = (char*)malloc(sizeof(char)*(3*MAX_PATH_LENGTH+200));
	memset(buffer,0,sizeof(buffer));
	sprintf(buffer,"docker run --rm -v %s:/project/build -v %s:/project/source -v %s:/root/dev/emsdk/upstream/emscripten/cache maukalinow/qtwasm_builder:%s",
			dest,src,EMSDK_CACHE_PATH,QT_VERSION_TAG);
	cout<<buffer<<endl;
	cout<<"========================="<<endl<<endl;
	system(buffer);
}

char* rp(char* path){ //realpath
	char* rpath = ALLOC;
	if(realpath(path,rpath)==NULL){
		cout<<"Invalid path: \t"<<path<<endl;
		exit(1);
	}
	return rpath;
}

int main(int argc,char *argv[])
{
	if(argc == 2)
		if(!strcmp(argv[1],"-h")||!strcmp(argv[1],"--help")){
			help();
			exit(0);
		}

	//init

	char *cwd = ALLOC, *src = ALLOC, *dest = ALLOC;
	memset(cwd,0,sizeof(cwd));
	memset(src,0,sizeof(src));
	memset(dest,0,sizeof(dest));

	if((cwd = getcwd(NULL, 0)) == NULL){
		perror("getcwd error");
		exit(1);
	}

	//search for arguments

	for(int i=1;i<argc;i++){
		if((!strcmp(argv[i],"-i") || !strcmp(argv[i],"--input"))
				&& !strcmp(src,"") && i+1<argc){
			strcpy(src,argv[++i]);
		}else if((!strcmp(argv[i],"-o") || !strcmp(argv[i],"--output"))
				 && !strcmp(dest,"") && i+1<argc)
			strcpy(dest,argv[++i]);
		else{
			cout<<"Incorrect argument: \t"<<argv[i]<<endl;
			cout<<"Use qtwasm -h to display help."<<endl;
			exit(1);
		}
	}

	//adjust for launch
	if(!strcmp(src,"") && !strcmp(dest,""))
		exec(cwd,strcat(rp(strcpy(dest,cwd)),"/build"));
	else if(!strcmp(src,""))
		exec(cwd,rp(dest));
	else if(!strcmp(dest,"")){
		if(*(src+strlen(src)-1)=='/')
			*(src+strlen(src)-1)=0;
		exec(rp(src),strcat(rp(strcpy(dest,src)),"/build"));
	}else
		exec(rp(src),rp(dest));

	return 0;
}