CCS C Compiler Manual PCB / PCM / PCH

PreProcessor
Note: you may NOT use C variables in the #IF. Only preprocessor identifiers
created via #define can be used.
The preprocessor expression DEFINED(id) may be used to return 1 if the id is
defined and 0 if it is not.
== and != operators now accept a constant string as both operands. This allows
for compile time comparisons and can be used with GETENV() when it returns
a string result.
Examples:
#if MAX_VALUE > 255
long value;
#else
int value;
#endif
#if getenv(“DEVICE”)==”PIC16F877”
//do something special for the PIC16F877
#endif
Example Files:
Also See:
ex_extee.c
#IFDEF, #IFNDEF, getenv()
#error
Syntax:
Elements:
Purpose:
Examples:
Example Files:
Also See:
#ERROR text
#ERROR / warning text
#ERROR / information text
text is optional and may be any text
Forces the compiler to generate an error at the location this
directive appears in the file. The text may include macros that
will be expanded for the display. This may be used to see the
macro expansion. The command may also be used to alert the
user to an invalid compile time situation.
#if BUFFER_SIZE>16
#error Buffer size is too large
#endif
#error Macro test: min(x,y)
ex_psp.c
#WARNING
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