Lpc2000

I am using arm-elf-gcc and get a compiler warning for the following
code:

 

typedef unsigned char uint8_t;
void main (void)

{

  uint8_t txBuf[25];

  strcpy(txBuf, "number");

}

 

above code produces:

warning: pointer targets in passing argument 1 of 'strcpy' differ in
signedness

 

"number" seems to be created as signed char.  My understanding is that
char is (in general) undefined whether it is signed or unsigned.
Specific compilers choose one or the other, but code should not assume
one or the other if the goal is portability.  I found some information
stating that arm-elf-gcc defines char as unsigned, so I shouldn't get
the warning in the first place.  Additionally, the flag -funsigned-char
for arm-elf-gcc should force it to be unsigned, but adding the flag
still produces the warning.  Can anyone suggest how to get rid of it?  I
would strongly prefer my char to be unsigned.

 

Thanks for the help.

Matt

 



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