cmake and libpthread

Question

I m running RHEL 5 1 and use gcc   How I tell cmake to add -pthread to compilation and linking

User · Answer

The following should be clean  using find package  and work  the find module is called FindThreads    cmake minimum required  VERSION 2 6   find package  Threads  add executable  myapp main cpp      target link libraries  myapp   CMAKE THREAD LIBS INIT

User · Answer

Manuel was part way there   You can add the compiler option as well  like this   If you have CMake 3 1 0   this becomes even easier   set THREADS PREFER PTHREAD FLAG ON  find package Threads REQUIRED  target link libraries my app PRIVATE Threads  Threads    If you are using CMake 2 8 12   you can simplify this to   find package Threads REQUIRED  if THREADS HAVE PTHREAD ARG    target compile options my app PUBLIC  -pthread   endif   if CMAKE THREAD LIBS INIT    target link libraries my app    CMAKE THREAD LIBS INIT    endif     Older CMake versions may require   find package Threads REQUIRED  if THREADS HAVE PTHREAD ARG    set property TARGET my app PROPERTY COMPILE OPTIONS  -pthread     set property TARGET my app PROPERTY INTERFACE COMPILE OPTIONS  -pthread   endif   if CMAKE THREAD LIBS INIT    target link libraries my app    CMAKE THREAD LIBS INIT    endif     If you want to use one of the first two methods with CMake 3 1   you will need set THREADS PREFER PTHREAD FLAG ON  there too

User · Answer

Here is the right anwser   ADD EXECUTABLE your executable   source files    TARGET LINK LIBRARIES  your executable pthread     equivalent to   -lpthread

User · Answer

target compile options solution above is wrong  it won t link the library  Use  SET CMAKE C FLAGS RELEASE  quot   CMAKE C FLAGS RELEASE  -pthread quot   OR target link libraries XXX PUBLIC pthread  OR set target properties XXX PROPERTIES LINK LIBRARIES -pthread

[pthreads] cmake and libpthread

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