what is the difference between -lpthread, -pthread, -lthread?

Hello,

I would like to know what is the difference between -lpthread, -pthread, -lthread?

Sometimes, I have been used -lpthread as a option of gcc.
but I don't understand anything about the others.

Thank you for your help.

--
JB

-lpthread is correct and the others probably will not work.

Ok ... so after doing a 'man gcc' I found:

-l<library> - used for linking libraries

-pthread - IA-64 option

-lpthread - link libpthread library into code

-lthread - on my systems I could not find a library called libthread, but assuming this is installed by some other software, this is what would be linked in