[CMake] Rules for files with non-standard extensions

[Mathieu Malaterre]

On Tue, Mar 3, 2009 at 9:06 PM, Steven Wilson
<steven.wesley.wilson at gmail.com> wrote:
> As a new member of the list, I just wanted to say thanks for providing this
> forum as a place to get answers about cmake!
> First, the problem:   I have a software system composed of a number of
> source files in C.   These files have an alternate file extension .bc.   In
> order to compile these files, the build system first needs to pass them
> through two preprocessors; 1. The C preprocessor and 2. a homegrown
> preprocessor that handles a private C language extension and converts
> occurrences of that language extension to standard C.   Finally the
> preprocessed source is handed to the C compiler.    My initial port of this
> build system used the following kind of construct:
> macro(process_bc_files INPUT_FILE)
>
> add_custom_command(OUTPUT ${INPUT_FILE}.c
>
> COMMAND preprocessor1 ${INPUT_FILE} > tmpfile
> COMMAND preprocessor2 tmpfile > ${INPUT_FILE}.c
>
> )
>
> endmacro(process_bc_files)

Just out of curiosity, does this work in parallel build (make -j4) ? I
am seeing a single 'tmpfile' for all your input files ...

-- 
Mathieu