3.5 Building Applications with the DECthreads Archive Library on Digital UNIX Versions 4.0 and Higher

Digital recommends that you use the kf77 -fkapargs='- conc' Digital UNIX linker switch default -call_ shared which causes an image to be linked with the DECthreads shared library libpthread.so . The shared library default eliminates the need for you to rebuild images each time a new version of Digital UNIX is released. However, in the case where you want to link the image to the DECthreads archive library libpthread.a , use the -non_shared switch and one of the following procedures based on your version of Digital UNIX:

• Digital UNIX Version 4.0:

  If you are upgrading from KAP Version 3.0 to 3.1, you should have performed the following installation steps:

  1. Copy /usr/opt/KPFBASE300/libpthread.a , to a private area, for example, /usr/users/tmp /libpthread.a

  2. Remove KPFBASE300 as follows:

     /usr/sbin/setld -d KPFBASE300
     

  3. Install KPFBASE310 as follows:

     /usr/sbin/setld -i KPFBASE310
     

  4. Create a link to the saved libpthread.a as follows:

     ln -sf /usr/users/tmp/libpthread.a /usr/lib/libpthread.a
     

  5. Use the following command when you build your program:

     kf77 -fkapargs='-conc' -non_shared myprog.f
     

• Digital UNIX Version 4.0a:

  Version 4.0a does not contain libpthread.a . Your choices are as follows:

  1. Upgrade to Version 4.0b and use the method for that version.

  2. Downgrade to Version 4.0 and use the method for that version.

  3. Use the kf77 -fkapargs='-conc' Digital UNIX linker switch default -call_shared which links an image with the DECthreads shared library /usr /shlib/libpthread.so .

• Digital UNIX Version 4.0b:

  You should have installed the CMPDEVENH subset (Development Enhancements for Digital UNIX) from the Digital UNIX 4.0b operating system CD-ROM. The DECthreads archive library is at the following location:

  /usr/opt/alt/user/lib/threads/libpthread.a
  

  To link to libpthread.a when you are building a parallel program, use the following command:

  kf77 -fkapargs='-conc' -non_shared \
  /usr/opt/alt/usr/lib/threads/libpthread.a myprog.f