Messages in this thread | | | Date | Thu, 3 Dec 2015 11:31:58 +0000 | From | Catalin Marinas <> | Subject | Re: [PATCH v6 05/19] arm64:uapi: set __BITS_PER_LONG correctly for ILP32 and LP64 |
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On Wed, Nov 18, 2015 at 12:16:45AM +0300, Yury Norov wrote: > diff --git a/arch/arm64/include/uapi/asm/bitsperlong.h b/arch/arm64/include/uapi/asm/bitsperlong.h > index fce9c29..4265243 100644 > --- a/arch/arm64/include/uapi/asm/bitsperlong.h > +++ b/arch/arm64/include/uapi/asm/bitsperlong.h > @@ -16,7 +16,14 @@ > #ifndef __ASM_BITSPERLONG_H > #define __ASM_BITSPERLONG_H > > -#define __BITS_PER_LONG 64 > +#if defined(__LP64__) > +/* Assuming __LP64__ will be defined for native ELF64's and not for ILP32. */ > +# define __BITS_PER_LONG 64 > +#elif defined(__ILP32__) > +# define __BITS_PER_LONG 32 > +#else > +# error "Neither LP64 nor ILP32: unsupported ABI in asm/bitsperlong.h" > +#endif
Quick question: IIRC, earlier aarch64 gcc versions did not generate __ILP32__ when -mabi=ilp32, they only removed __LP64__. When did the change happen? Could we assume that all compiler versions used to generate ILP32 would define this?
-- Catalin
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