Uclinux-2008r1-rc8 (bf561) to VDSP5 porting (10): Compiler configuration

Due to the difference between VDSP5 and GCC, the appropriate configuration is required in Config.h.

1 __kernel__

For uclinux kernel compilation, the definition of __kernel__ must be added. This is accomplished in the original file of Uclinux by controlling the compiler's options in makefile. I added #include <config.h> to the C file header of each uclinux kernel, so I put this definition directly in Config.h:

#define __KERNEL__ 1//only applies to kernel configuration

2 GCC version number

In Uclinux header file (include/compiler.h), to detect the version number of GCC:

#if __GNUC__ >= 4
# include <linux/compiler-gcc4.h>
#elif __GNUC__ == 3 && __GNUC_MINOR__ >= 2
# include <linux/compiler-gcc3.h>
#else
# error Sorry, your compiler is too old/not recognized.
#endif

Because VDSP is known to have good compatibility with gcc3.4, add the following definition to the Config.h:

#define __GNUC__　　　　　　3
#define　 __GNUC_MINOR__　　4