❯ gcc main.c-o main❯ zig cc main.c-o main❯ ./mainHello world

❯ zig cc main.c-o main--target=aarch64-linux-musl❯docker run-it--rm-v$(pwd):/data-w /data alpine:3.16 ./mainHello world

cmake_minimum_required(VERSION3.5)include(ExternalProject)enable_language(Fortran)set(CMAKE_CXX_STANDARD14)set(PROJECT_ROOT"${CMAKE_CURRENT_LIST_DIR}")find_package(Git QUIET)if(GIT_FOUNDAND EXISTS"${PROJECT_ROOT}/.git")execute_process(COMMAND${GIT_EXECUTABLE} submodule update --init --recursiveWORKING_DIRECTORY${PROJECT_ROOT}    RESULT_VARIABLE GIT_SUBMOD_RESULT)if(NOT GIT_SUBMOD_RESULTEQUAL"0")message(FATAL_ERROR"git submodule update --init --recursive failed with${GIT_SUBMOD_RESULT}, please checkout submodules")endif()endif()if(APPLE)set(CMAKE_CXX_FLAGS"${CMAKE_C_FLAGS} -framework Accelerate")endif()message(${CMAKE_HOST_SYSTEM_NAME})message(${CMAKE_SOURCE_DIR})message("${cmake_current_source_dir}")find_package(BLAS)if(BLAS_FOUND)set(CMAKE_CXX_FLAGS"${CMAKE_CXX_FLAGS} -I${BLAS_INCLUDE_DIR} -DEIGEN_USE_BLAS")endif()set(third_PARTY_DIR"${PROJECT_ROOT}/third_party")set(EIGEN3_INCLUDE_DIRS"${third_PARTY_DIR}/eigen")set(SPECTRA_INCLUDE_DIRS"${third_PARTY_DIR}/spectra/include")set(CMAKE_CXX_FLAGS"${CMAKE_CXX_FLAGS} -DEIGEN_FAST_MATH=1 -DEIGEN_NO_DEBUG -DTHREAD_SAFE")project(sample CXX)add_executable(main${PROJECT_ROOT}/src/main.cpp)target_include_directories(mainPUBLIC${EIGEN3_INCLUDE_DIRS}${SPECTRA_INCLUDE_DIRS})target_link_libraries(main m blas${BLAS_LIBRARIES})message("${CMAKE_CXX_FLAGS}")

mkdir buildcd buildcmake..make./build/main

const std=@import("std");const Builder= std.build.Builder;pubfnbuild(b:*Builder)void{const target= b.standardTargetOptions(.{});const mode= b.standardReleaseOptions();ensureSubmodules(b.allocator)catch|err|@panic(@errorName(err));const exe= b.addExecutable("main",null);    exe.setTarget(target);    exe.setBuildMode(mode);    exe.addCSourceFile("src/main.cpp",&[_][]constu8{});    exe.addIncludeDir("third_party/eigen");    exe.addIncludeDir("third_party/spectra/include");    exe.defineCMacro("EIGEN_FAST_MATH","1");    exe.defineCMacro("THREAD_SAFE","");    exe.linkSystemLibrary("m");if(target.isNative()){        exe.defineCMacro("EIGEN_USE_BLAS","");        exe.linkSystemLibrary("blas");if(target.isDarwin()){            exe.linkFramework("Accelerate");}}if(b.is_release){        exe.defineCMacro("EIGEN_NO_DEBUG","");}    exe.linkLibCpp();    exe.install();const run_cmd= exe.run();    run_cmd.step.dependOn(b.getInstallStep());if(b.args)|args|{        run_cmd.addArgs(args);}const run_step= b.step("run","Run the app");    run_step.dependOn(&run_cmd.step);}fnensureSubmodules(allocator:std.mem.Allocator)!void{if(std.process.getEnvVarOwned(allocator,"NO_ENSURE_SUBMODULES"))|no_ensure_submodules|{if(std.mem.eql(u8, no_ensure_submodules,"true"))return;}else|_|{}var child= std.ChildProcess.init(&.{"git","submodule","update","--init","--recursive"}, allocator);    child.cwd=(comptimethisDir());    child.stderr= std.io.getStdErr();    child.stdout= std.io.getStdOut();    _=try child.spawnAndWait();}fnthisDir()[]constu8{return std.fs.path.dirname(@src().file)orelse".";}

zig build run