Initial commit

Author: mrexodia

.gitignore

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+bin
+bin2
+compile_commands.json
+.clangd
+temp.*
+.vs
+.cache
+build*/
+.idea/
+cmake-build*/
+CMakeLists.txt.user

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.22)
+
+project(cmake-zig)
+
+add_library(mylib-static STATIC src/mylib.cpp)
+add_library(mylib-shared SHARED src/mylib.cpp)
+
+add_executable(myexe src/myexe.cpp)
+target_link_libraries(myexe PRIVATE mylib-static)

README.md

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+# zig-cross
+
+Example of using [zig](https://ziglang.org) as a CMake Toolchain for cross compiling.
+
+Reference: https://zig.news/kristoff/cross-compile-a-c-c-project-with-zig-3599
+
+## Building
+
+- [Install zig](https://ziglang.org/learn/getting-started/#installing-zig) in your PATH (`choco install zig` on Windows)
+- `cmake -B build-aarch64 -G Ninja -DCMAKE_TOOLCHAIN_FILE=cmake/zig-toolchain-aarch64.cmake`
+- `cmake --build build-arch64`

cmake/zig-ar.cmd

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+@echo off
+zig ar %*

cmake/zig-ar.sh

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+#!/bin/sh
+zig ar "$@"

cmake/zig-ranlib.cmd

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+@echo off
+zig ranlib %*

cmake/zig-ranlib.sh

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+#!/bin/sh
+zig ranlib "$@"

cmake/zig-toolchain-aarch64.cmake

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+if(CMAKE_GENERATOR MATCHES "Visual Studio")
+    message(FATAL_ERROR "Visual Studio generator not supported, use: cmake -G Ninja")
+endif()
+set(CMAKE_SYSTEM_NAME "Linux")
+set(CMAKE_SYSTEM_VERSION 1)
+set(CMAKE_SYSTEM_PROCESSOR "aarch64")
+set(CMAKE_C_COMPILER "zig" cc -target aarch64-linux-gnu)
+set(CMAKE_CXX_COMPILER "zig" c++ -target aarch64-linux-gnu)
+
+if(WIN32)
+    set(SCRIPT_SUFFIX ".cmd")
+else()
+    set(SCRIPT_SUFFIX ".sh")
+endif()
+
+# This is working (thanks to Simon for finding this trick)
+set(CMAKE_AR "${CMAKE_CURRENT_LIST_DIR}/zig-ar${SCRIPT_SUFFIX}")
+set(CMAKE_RANLIB "${CMAKE_CURRENT_LIST_DIR}/zig-ranlib${SCRIPT_SUFFIX}")

src/myexe.cpp

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+#include <cstdio>
+
+#include "mylib.h"
+
+int main()
+{
+	puts(mylib());
+}

src/mylib.cpp

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+#include "mylib.h"
+
+const char* mylib()
+{
+	return "hello from mylib";
+}

src/mylib.h

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+#pragma once
+
+#ifdef _WIN32
+#define MYLIB_EXPORT __declspec(dllexport)
+#else
+#define MYLIB_EXPORT
+#endif // _WIN32
+
+
+extern "C" MYLIB_EXPORT const char* mylib();