3.2 Preprocessing a Program for Parallel Execution Using kapc

To execute KAP as a standalone preprocessor, use the following commands as follows:

cc /define=(__KAP,__ALPHA,__DECC,_FASTMATH,_INLINE_INTRINSICS,_INTRINSICS) -
            /NOLINE_DIRECTIVES/PREPROCESS_ONLY=ktmpa416.c  myprog.c

kapc /cmp=myprog_cmp.c ktmpa416.c  /conc

cc/optimize=(tune=host,level=4)/ANSI_ALIAS myprog_cmp.c

link /threads_enable/EXECUTABLE=myprog.exe myprog_cmp.obj,SYS$COMMON:[SYSLIB]kio/lib,
SYS$COMMON:[SYSLIB]kmp/lib

• /ANSI_ALIAS -Directs the compiler to assume the ANSI C aliasing rules, thereby giving it the freedom to generate better optimized code.

• /conc - tells KAP to restructure source code for parallel processing.

• /cmp - causes KAP to save the optimized source program under the file name of your choice. The kapc default is to name the optimized source file_name_cmp .

• /threads_enable -allows a multithreaded application to have a thread executing on every CPU in a multiprocessor system.

• /optimize=(tune=host,level=4) - tells the compiler to optimize for the architecture of the host processor and to set the compiler optimization level 4 for full optimization.)

• sys$common:[syslib]kmp/lib - causes the linker to link to the KAP parallel processing library /sys$common:[syslib]kmp.olb .

• sys$common:[syslib]kio/lib - causes the linker to link to the KAP I/O library /sys$common:[syslib]kio.olb .

Note

When you use kapc to preprocess a file, you must set the DEC C compiler and linker qualifiers appropriately. For this reason, Digital recommends that you use kcc whenever possible, as kcc automatically sets the compiler and linker qualifiers correctly.