Cannot find header files pthread.h or qp0ztype.h or qp0zptha.h

You may find that your compilation fails because the system header files required to compile a threaded program or to use the threaded interfaces cannot be found. This problem has one of several causes:

• If you get failure messages similar to the following:

  KULACK/QCSRC/MYPGM line 5: Unable to find #include file *LIBL/H(PTHREAD).
  

  you might have one of two problems:

  • Either your system does not have the C header files for openness (the QSYSINC library) installed, you are on a Version 4 Release 2 system and you do not have the PTF installed (PTF number 5769SS1-J664741) that provides the Pthread header files.
  • Your compile command is not searching the correct locations for system header files.

  In order to correct these problems, do one of the following:

  • Install the Openness includes (System Openness Includes, 5769-SS1 Option 3) and the QSYSINC library, install the PTF support (PTF number 5769SS1-J664741) for kernel threads header files.
  • Correct your search paths or library list.
  
  
• If you get failure messages similar to the following:

  QSYSINC/H/PTHREAD line 48: Unable to find #include file QCPA/H(PTHREAD).
  QSYSINC/H/PTHREAD line 60: #error "#ifndef _MULTI_THREADED" 
  QSYSINC/H/PTHREAD line 61: #error "#ifndef QP0Z_CPA_THREADS_PRESENT"
  

  you have forgotten to define the _MULTI_THREADED preprocessor symbol. Use the C preprocessor statement `#define _MULTI_THREADED' in your application, or define _MULTI_THREADED on the CRTCMOD or other compile command that you use to compile your modules. Because the CPA toolkit supported threads before kernel threads being introduced on the server, if you do not define _MULTI_THREADED when compiling your C modules, the system attempts to compile your application using the CPA header files. The recommended threads model is kernel threads. You must define _MULTI_THREADED when you compile your application.

• If you get failure messages similar to the following:

  QCPA/H/PTHREAD line 171: Unable to find #include file *LIBL/H(QP0ZTYPE).
  QCPA/H/PTHREAD line 183: Unable to find #include file *LIBL/H(QP0ZPTHA).
  

  you have forgotten to define the _MULTI_THREADED preprocessor symbol. Use the C preprocessor statement #define _MULTI_THREADED in your application, or define _MULTI_THREADED on the CRTCMOD or other compile command that you use to compile your modules. Because the CPA toolkit supported threads prior to kernel threads being introduced on the server0, if you do not define _MULTI_THREADED when compiling your C modules, the system attempts to compile your application using the CPA header files. The recommended threads model is kernel threads. You must define _MULTI_THREADED when you compile your application.