OS X clang -pthread

Question

在OS X中使用带有clang的pthread库有什么编译器/链接器要求.

使用GCC我知道使用-pthread设置适当的编译器/链接器选项,但我不确定OS X与clang.

air:~ jose$ clang++ -c test.cpp -pthread
air:~ jose$ clang++ -o test -pthread test.o 
clang: warning: argument unused during compilation: '-pthread'

air:~ jose$ g++ -c test.cpp -pthread
air:~ jose$ g++ -o test -pthread test.o 

Answer 1

clang -pthread在编译时需要,但在链接时不需要.这很烦人,但观察到的行为:

$ clang -c x.cpp
$ clang -pthread -c x.cpp
$ clang -o x x.o
$ clang -pthread -o x x.o
clang: warning: argument unused during compilation: '-pthread'
$ 

$ clang --version
Apple LLVM version 5.0 (clang-500.2.76) (based on LLVM 3.3svn)
Target: x86_64-apple-darwin13.0.0
Thread model: posix
$