Using 'ccache' or 'distcc'

If you use either of these tools, you need to use the --comptype prefix setting when configuring Coverity Analysis for your compiler, as shown in the examples below. This setting can help avoid unexpected defect reports.

'ccache' configuration

If you use ccache (for example, with gcc), your cov-configure command line should specify the following:

> cov-configure --comptype prefix --compiler ccache

> cov-configure --comptype gcc --compiler gcc

'distcc' configuration

If ccache is set up to execute distcc (for example, through the CCACHE_PREFIX variable), it is only necessary to configure the prefix for ccache.
If your distcc installation uses the name of the underlying compiler (for example, gcc -c sampleProgram.c, where gcc is really distcc), your cov-configure command line should specify the following:
```
> cov-configure --comptype <comptype_of_real_compiler> \
  --compiler <distcc_executable_name>
```
If you are prepending distcc to compiler command lines (for example, distcc gcc -c sampleProgram.c), your cov-configure command line should specify the following:
```
> cov-configure --comptype prefix --compiler distcc
```
```
> cov-configure --comptype <comptype_of_real_compiler> \ 
  --compiler <first_argument_to_distcc>
```
The first argument to distcc is the name of executable for the real compiler, for example, gcc.
If distcc is used directly as a compiler (for example, distcc -c sampleProgram.c), your command line should specify the following:
```
> cov-configure --comptype <comptype_of_real_compiler> \
  --compiler distcc
```