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77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
#ifndef COMPILER_H
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#define COMPILER_H
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/* We export the symbol obj_OBJECT (OBJECT is defined on command-line)
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* as a global symbol, so that the linker can drag in selected object
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* files from the library using -u obj_OBJECT.
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*
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* Not quite sure why cpp requires two levels of macro call in order
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* to actually expand OBJECT...
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*/
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#undef _H1
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#define _H1( x, y ) x ## y
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#undef _H2
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#define _H2( x, y ) _H1 ( x, y )
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#define PREFIX_OBJECT(prefix) _H2 ( prefix, OBJECT )
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#define OBJECT_SYMBOL PREFIX_OBJECT(obj_)
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#undef _STR
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#define _STR(s) #s
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#undef _XSTR
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#define _XSTR(s) _STR(s)
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#define OBJECT_SYMBOL_STR _XSTR ( OBJECT_SYMBOL )
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#ifdef ASSEMBLY
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.globl OBJECT_SYMBOL
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.equ OBJECT_SYMBOL, 0
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#else /* ASSEMBLY */
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__asm__ ( ".globl\t" OBJECT_SYMBOL_STR );
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__asm__ ( ".equ\t" OBJECT_SYMBOL_STR ", 0" );
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/*
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* Macro to allow objects to explicitly drag in other objects by
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* object name. Used by config.c.
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*
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*/
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#define REQUIRE_OBJECT(object) \
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__asm__ ( ".equ\tneed_" #object ", obj_" #object );
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/*
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* If debug_OBJECT is set to a true value, the macro DBG(...) will
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* expand to printf(...) when compiling OBJECT, and the symbol
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* DEBUG_LEVEL will be inserted into the object file.
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*
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*/
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#define DEBUG_SYMBOL PREFIX_OBJECT(debug_)
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#if DEBUG_SYMBOL
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#include "console.h"
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#define DEBUG_SYMBOL_STR _XSTR ( DEBUG_SYMBOL )
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__asm__ ( ".equ\tDEBUG_LEVEL, " DEBUG_SYMBOL_STR );
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#endif
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#define DBG_PRINT(...) printf ( __VA_ARGS__ )
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#define DBG_DISCARD(...)
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#define DBG DBG_DISCARD
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#define DBG2 DBG_DISCARD
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#if DEBUG_SYMBOL >= 1
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#undef DBG
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#define DBG DBG_PRINT
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#endif
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#if DEBUG_SYMBOL >= 2
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#undef DBG2
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#define DBG2 DBG_PRINT
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#endif
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#define PACKED __attribute__((packed))
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#define __unused __attribute__((unused))
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#define __used __attribute__((used))
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#endif /* ASSEMBLY */
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#endif /* COMPILER_H */
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