Building on OSX
根据官网的说法，安装非常简单
brew install gcc@8
pip3 install xgboost
但是---
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/Availability.h:257:22: error: missing binary operator before token "("
#if __has_builtin(__is_target_arch)
在使用pip3安装时报错（居然还是来自xcode源码的错误……我服了
根据homebrew上的说法
This is a bug in the C library that comes with the updated Xcode. To fix it, edit the file /Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include/Availability.h (must be done as root). Near the point where the error is generated (line number 257), add the following two lines:
Xcode更新的源码里有bug……
需要修改:在/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/Availability.h中添加两行
#elif defined(__MAC_OS_X_VERSION_MIN_REQUIRED)
#if defined(__has_builtin) // <=== ADD THIS LINE
#if __has_builtin(__is_target_arch)
#if __has_builtin(__is_target_vendor)
#if __has_builtin(__is_target_os)
#if __has_builtin(__is_target_environment)
#if __has_builtin(__is_target_variant_os)
#if __has_builtin(__is_target_variant_environment)
#if (__is_target_arch(x86_64) && __is_target_vendor(apple) && ((__is_target_os(ios) && __is_target_environment(macabi)) || (__is_target_variant_os(ios) && __is_target_variant_environment(macabi))))
#define __OSX_AVAILABLE_STARTING(_osx, _ios) __AVAILABILITY_INTERNAL##_osx __AVAILABILITY_INTERNAL##_ios
#define __OSX_AVAILABLE_BUT_DEPRECATED(_osxIntro, _osxDep, _iosIntro, _iosDep) \
__AVAILABILITY_INTERNAL##_osxIntro##_DEP##_osxDep __AVAILABILITY_INTERNAL##_iosIntro##_DEP##_iosDep
#define __OSX_AVAILABLE_BUT_DEPRECATED_MSG(_osxIntro, _osxDep, _iosIntro, _iosDep, _msg) \
__AVAILABILITY_INTERNAL##_osxIntro##_DEP##_osxDep##_MSG(_msg) __AVAILABILITY_INTERNAL##_iosIntro##_DEP##_iosDep##_MSG(_msg)
#endif /* # if __is_target_arch... */
#endif /* #if __has_builtin(__is_target_variant_environment) */
#endif /* #if __has_builtin(__is_target_variant_os) */
#endif /* #if __has_builtin(__is_target_environment) */
#endif /* #if __has_builtin(__is_target_os) */
#endif /* #if __has_builtin(__is_target_vendor) */
#endif /* #if __has_builtin(__is_target_arch) */
#endif // <=== ADD THIS LINE
#ifndef __OSX_AVAILABLE_STARTING
#define __OSX_AVAILABLE_STARTING(_osx, _ios) __AVAILABILITY_INTERNAL##_osx
#define __OSX_AVAILABLE_BUT_DEPRECATED(_osxIntro, _osxDep, _iosIntro, _iosDep) \
__AVAILABILITY_INTERNAL##_osxIntro##_DEP##_osxDep
#define __OSX_AVAILABLE_BUT_DEPRECATED_MSG(_osxIntro, _osxDep, _iosIntro, _iosDep, _msg) \
__AVAILABILITY_INTERNAL##_osxIntro##_DEP##_osxDep##_MSG(_msg)
#endif /* __OSX_AVAILABLE_STARTING */
#else
修改完后就成功安装了，还真是这个bug，我服了……
