ld：找不到用于-lpthread的库

Question

I am trying to compile a program on Mac 10.9.1 but am facing a problem. On running gcc command with -lpthread flag to create a dylib , the linking fails with the following error.

ld : library not found for -lpthread.

libpthread.dylib is located in /usr/lib/

Can anyone help.

Thanks

Answer 1

It sounds like you need to specify the directory that contains the libpthread.dylib file, which on most Macs is /usr/lib . Do this using the -L argument to ld , as in ld -L/usr/lib -lpthread .

Edit: gcc also accepts the -L argument.

Answer 2

Using -lpthread is technically not the right way to do it. You get better, more portable results by using -pthread on the GCC command line. Use it for the compile and the link. It will set important preprocessor definitions and link the necessary libraries.