Use ctcwrap for makefiles

With the small example from the basic tutorial, we describe a convenient way how to use Testwell CTC++ with makefiles and ctcwrap.

Assume we are using a makefile and we normally do the program building with nmake. Building an instrumented program can be done as simply as

ctcwrap -i m nmake

Whenever the makefile emits cl and link commands, they are executed as if they were ctc -i m cl and ctc -i m link commands. Hence the program source files get instrumented, compiled and linked with Testwell CTC++ using the given instrumentation options. This special treatment on cl and link commands is in effect only during the execution of the ctcwrap argument command.

This arrangement does not require that the makefile is written in some special way, for example that the compile and link commands can be redefined. The makefile may also call inner makefiles.

Also other build processes can be wrapped in this way, for example

ctcwrap -i d -v mybuildscript.bat

The only requirement for such a usage is that the compile and link commands are emitted using the environment variable PATH, not with an explicit path.