[openbeos] building not so custom targets

Hello,

1/ i need to build two targets with the same files.
Should i do something like this ? Am i sure it'll CC two times the file.c and 
not reuse the first one ? Is it the way to do this ?

{
      SubDirCcFlags -DPROG1 -Wall -Wno-multichar ;
        SubDirC++Flags -DPROG1 -Wall -Wno-multichar ;
}

R5KernelAddon prog1 : bin :
         file.c ;

{
      SubDirCcFlags -DPROG2 -Wall -Wno-multichar ;
        SubDirC++Flags -DPROG2 -Wall -Wno-multichar ;
}

R5KernelAddon prog2 : bin :
         file.c ;


2/ How can i extend the #include search to subdirectories ?
#include "file.h" // file.h is in a subdirectory

3/ How can i extend source search to subdirectories or a subdirectory of the 
parent directory ?
R5KernelAddon prog1 : bin :
         file.c ; # file.c is in a subdirectory

4/ Is it mandatory to use locked memory (not with malloc) in interrupt handlers 
?

5/ Using cpp in kernel drivers seems possible. Is it just including 
kernel_cpp.h 
and linking kernel_cpp.cpp ? are there some issues i should know (virtual 
functions, exporting compliant drivers symbols in a cpp file... ) ?
R5KernelAddon udf : bin :
        kernel_cpp.cpp
        file.cpp

SEARCH on [ FGristFiles
                kernel_cpp.cpp 
        ] = [ FDirName $(OBOS_TOP) src kernel core util ] ;

Thanks for all,

Jerome

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