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Diffstat (limited to 'src/include/compiler.h')
| -rw-r--r-- | src/include/compiler.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/src/include/compiler.h b/src/include/compiler.h new file mode 100644 index 000000000..401d4e458 --- /dev/null +++ b/src/include/compiler.h @@ -0,0 +1,41 @@ +#ifndef COMPILER_H +#define COMPILER_H + +/* We export the symbol obj_OBJECT (OBJECT is defined on command-line) + * as a global symbol, so that the linker can drag in selected object + * files from the library using -u obj_OBJECT. + * + * Not quite sure why cpp requires two levels of macro call in order + * to actually expand OBJECT... + */ +#undef _H1 +#define _H1( x, y ) x ## y +#undef _H2 +#define _H2( x, y ) _H1 ( x, y ) +#define OBJECT_SYMBOL _H2 ( obj_, OBJECT ) +#undef _STR +#define _STR(s) #s +#undef _XSTR +#define _XSTR(s) _STR(s) +#define OBJECT_SYMBOL_STR _XSTR ( OBJECT_SYMBOL ) + +#ifdef ASSEMBLY + + .globl OBJECT_SYMBOL + .equ OBJECT_SYMBOL, 0 + +#else /* ASSEMBLY */ + +__asm__ ( ".globl\t" OBJECT_SYMBOL_STR ); +__asm__ ( ".equ\t" OBJECT_SYMBOL_STR ", 0" ); + +#define REQUIRE_OBJECT(object) \ + __asm__ ( ".equ\tneed_" #object ", obj_" #object ); + +#define PACKED __attribute__((packed)) +#define __unused __attribute__((unused)) +#define __used __attribute__((used)) + +#endif /* ASSEMBLY */ + +#endif /* COMPILER_H */ |