macos - MacOS Catalina 升级后 Go 程序无法运行

Question

这可能是一个奇怪的问题，但在 MacOS Catalina 升级后，一些用 Go 编写的程序将无法在我的 MacBook Pro 上运行。

然而，一个基本的“Hello World”程序运行，但随后我使用 net/http 包编写程序，我收到以下错误:

Note: The programs are correct, they run fine inside a Docker container

输出(IntelliJ):

# runtime/cgo
In file included from gcc_darwin_amd64.c:6:
/usr/local/include/pthread.h:331:6: error: macro expansion producing 'defined' has undefined behavior [-Werror,-Wexpansion-to-defined]
/usr/local/include/pthread.h:200:2: note: expanded from macro '_PTHREAD_SWIFT_IMPORTER_NULLABILITY_COMPAT'
/usr/local/include/pthread.h:331:6: error: macro expansion producing 'defined' has undefined behavior [-Werror,-Wexpansion-to-defined]
/usr/local/include/pthread.h:200:34: note: expanded from macro '_PTHREAD_SWIFT_IMPORTER_NULLABILITY_COMPAT'
/usr/local/include/pthread.h:540:6: error: macro expansion producing 'defined' has undefined behavior [-Werror,-Wexpansion-to-defined]
/usr/local/include/pthread.h:200:2: note: expanded from macro '_PTHREAD_SWIFT_IMPORTER_NULLABILITY_COMPAT'
/usr/local/include/pthread.h:540:6: error: macro expansion producing 'defined' has undefined behavior [-Werror,-Wexpansion-to-defined]
/usr/local/include/pthread.h:200:34: note: expanded from macro '_PTHREAD_SWIFT_IMPORTER_NULLABILITY_COMPAT'

我已经尝试过的事情:

1. 重新安装 go
2. 重新安装xcode
3. 检查 GOPATH 和 GOROOT 是否设置正确

用过的:

MacOS version - Catalina 10.15.6
Go version - go1.15.2 darwin/amd64

Answer 1

在终端窗口中键入 xcode-select -print-path 并检查您的安装目录。在我的例子中，输出是:/Applications/Xcode.app/Contents/Developer

如果情况相同，则在您的终端上使用以下命令可以解决问题:

sudo xcode-select --switch /Library/Developer/CommandLineTools

另一种选择是使用此 issue 中提到的 CGO_CPPFLAGS , 但它会在 session 中工作:

export CGO_CPPFLAGS="-Wno-error -Wno-nullability-completeness -Wno-expansion-to-defined -Wno-builtin-requires-header"