++*ptr;   // Unable to evaluate expression in HiTech, works fine in SDCC

++(*ptr); // Unable to evaluate expression in HiTech, works fine in SDCC

(*prt)++; // Unable to evaluate expression in HiTech, works fine in SDCC

*ptr += 1; // Unable to evaluate expression in HiTech
*ptr + 1; // Compiles OK in Hitech and SDCC but not sure about the result

unsigned char c;

void main(void)
{
    unsigned char *p = &c;

    ++*p;

    for (;;);
}

 	for(g_bySPIIndex = 0; g_bySPIIndex < 128; g_bySPIIndex++)
	{	// Send Data through SPI for up to a Page
		g_wSPIIndex = g_pwSPIDataBuffer[*g_pwSPIReadPointer];// Fetch a WORD from Buffer

		SPI0DAT = (BYTE)(g_wSPIIndex&0xFF);			// LSB
		while (SPIF == 0) ; 	// Wait till byte transmitted
		SPIF = 0;				// Clear Interrupt Flag

		SPI0DAT = (BYTE)((g_wSPIIndex>>8)&0xFF);	// MSB
		while (SPIF == 0) ; 	// Wait till byte transmitted
		SPIF = 0;				// Clear Interrupt Flag
		++*g_pwSPIReadPointer;	// Linker Error in this line
		//(*g_pwSPIReadPointer) + 1;	// Work OK
		if(*g_pwSPIReadPointer >= g_wSPIReadMaxLimit)
		{	// Reverse Buffer Traversal, when it reached to Max
			*g_pwSPIReadPointer = 0;
		}
	} 

	WORD *g_pwSPIReadPointer;	// Pointer to content for Data buffer Read Pointer 

 extern  WORD *g_pwSPIReadPointer;	// Pointer to content for Data buffer Read Pointer