swift - swiftc -target 和 -target-cpu 选项可以使用哪些目标？

Question

这个问题是关于交叉编译的。

使用 swift 编译器的 -target 或 -target-cpu 选项可以使用哪些不同的目标？我在哪里可以找到概述？

它只能用于创建 iOS/watchOS 应用程序，还是我可以使用它在 macOS 上创建 linux 程序(常规 x86-64 处理器)？

我尝试搜索 github 存储库，发现 'x86_64-unknown-linux-gnu' 作为目标。然而，当我尝试编译一个简单的“hello world”程序(swiftc -target x86_64-unknown-linux-gnu test.swift)时，我得到了这个错误:

<unknown>:0: error: unable to load standard library for target 'x86_64-unknown-linux-gnu'

编辑:我同意克里斯蒂法蒂的观点。这个问题的最后一部分是关于如何正确包含/引用 glibc (？!？)。

Answer 1

如果你看Swift repository on Github (确切位置:swift/utils/swift_build_support/swift_build_support/targets.py)您将在 line 149-192 看到所有主机目标在 target.py .

支持:

def host_target():
    """
    Return the host target for the build machine, if it is one of
    the recognized targets. Otherwise, throw a NotImplementedError.
    """
    system = platform.system()
    machine = platform.machine()

    if system == 'Linux':
        if machine == 'x86_64':
            return StdlibDeploymentTarget.Linux.x86_64
        elif machine.startswith('armv7'):
            # linux-armv7* is canonicalized to 'linux-armv7'
            return StdlibDeploymentTarget.Linux.armv7
        elif machine.startswith('armv6'):
            # linux-armv6* is canonicalized to 'linux-armv6'
            return StdlibDeploymentTarget.Linux.armv6
        elif machine == 'aarch64':
            return StdlibDeploymentTarget.Linux.aarch64
        elif machine == 'ppc64':
            return StdlibDeploymentTarget.Linux.powerpc64
        elif machine == 'ppc64le':
            return StdlibDeploymentTarget.Linux.powerpc64le
        elif machine == 's390x':
            return StdlibDeploymentTarget.Linux.s390x

    elif system == 'Darwin':
        if machine == 'x86_64':
            return StdlibDeploymentTarget.OSX.x86_64

    elif system == 'FreeBSD':
        if machine == 'amd64':
            return StdlibDeploymentTarget.FreeBSD.x86_64

    elif system == 'CYGWIN_NT-10.0':
        if machine == 'x86_64':
            return StdlibDeploymentTarget.Cygwin.x86_64

    elif system == 'Windows':
        if machine == "AMD64":
            return StdlibDeploymentTarget.Windows.x86_64

    raise NotImplementedError('System "%s" with architecture "%s" is not '
                              'supported' % (system, machine))