Thank you for your reply.But I tried to modify the linux-arm.mk file by
adding
$(combo_target)GLOBAL_CFLAGS += \
                                                        -mach=arm5te
-mtune=xscale \
                                                        -msoft-float -fpic \
                                                         .....\
                                                        -DMY_TEST_CODE
and I coded the kernel/init/main.c like

... start_kernel(void)
{
...
#ifdef MY_TEST_CODE
      printk("CFLAG OK\n");
// my test code here
#else
      printk("CFLAG FAIL\n");
// original Android code here
#endif
}

but print message is CFLAG FAIL. so it doesnot seem to
 work.

can you please tell me what's wrong with my work?


2009/8/12 Christian Kuester <[email protected]>

>
> chungae9ri wrote:
> > #ifdef MY_TEST_CODE
> > // my test code here
> > ....
> > #else
> >  // original android source here
> > ...
> > #endif
> > and want to apply that definition to all files in Android source tree.
>
> Have a look at
> $android/build/core/combo/linux-arm.mk (depending on your target
> arch).
> You may be able to set global CFLAGS in this file.
>
>
>
> Chris
> --
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