[U-Boot] Building C++ Examples

[Chris Colicino]

Hello,

I'm trying to port an application from an old system to run after u-boot
is initialized.  The application uses C++ classes.  It was modified to remove
the code that utilized the old processor.  The application compiles using the
cross-compiler by itself, by executing the command:
   ppc_4xxFP-g++ program.cpp -o program

However, if I add u-boot specific functions, it will not compile (as expected).

To fix this I tried to build the application as a u-boot example.  I edited the 
Makefile in the examples directory and added the line:
  ELF-ppc                          += program

When building u-boot, it fails to compile the example program.  It seems that the
cross-compiler is not used for g++, since the following occurs:

make[1]: Entering directory `/home/chris/build_envs/ppc-linux/u-boot-ppc4xx/examples/standalone'
g++  -g  -Os   -mrelocatable -fPIC -ffixed-r14 -meabi -D__KERNEL__ 
-DTEXT_BASE=0xFFFA0000 -I/home/chris/build_envs/ppc-linux/u-boot-ppc4xx/include 
-fno-builtin -ffreestanding -nostdinc -isystem 
/home/chris/build_envs/ppc-linux/usr/bin/../lib/gcc/powerpc-linux/4.2.2/include 
-pipe  -DCONFIG_PPC -D__powerpc__ -DCONFIG_4xx -ffixed-r2 -mstring -msoft-float 
-Wa,-m405 -mcpu=405 -I..  -c -o program.o program.cpp
`-mcpu=' is deprecated. Use `-mtune=' or '-march=' instead.
as: unrecognized option '-m405'
cc1plus: error: unrecognized command line option "-mrelocatable"
cc1plus: error: unrecognized command line option "-meabi"
cc1plus: error: unrecognized command line option "-mstring"
cc1plus: warning: unknown register name: r2
program.cpp:1: error: bad value (405) for -mtune= switch
make[1]: *** [program.o] Error 1

If I change the file to a C file (program.c) and remove the C++ dependent classes, the program
compiles along with u-boot without error.

Does u-boot support C++ example programs and if so, how can I build one?

-Chris