Re: gcc on AIX

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On Mon, 20 Sep 2004, Pierce, Andrew M wrote:

> Hello. I hope this is the right place to submit questions. I
> consistently get compile errors, even with the simplest C++ program, on
> AIX. The error states, 'sigset64_t' is used as a type, but is not
> defined as a type.
>  
> It seems to me that the compiler is trying to compile in 64-bit mode.
> Our AIX installation is running in 32 bit mode. I have Googled this and
> found alot of people with the same error but no solutions.
>  

>From the man page for gcc in the RS6000-specific options:


              The -mpowerpc option allows GCC to generate instructions
              that are found only in the 32-bit subset of the PowerPC
              architecture.  Specifying -mpowerpc-gpopt implies
              -mpowerpc and also allows GCC to use the optional
              PowerPC architecture instructions in the General Purpose
              group, including floating-point square root.  Specifying
              -mpowerpc-gfxopt implies -mpowerpc and also allows GCC
              to use the optional PowerPC architecture instructions in
              the Graphics group, including floating-point select.

              The -mpowerpc64 option allows GCC to generate the
              additional 64-bit instructions that are found in the
              full PowerPC64 architecture and to treat GPRs as 64-bit,
              doubleword quantities.  GCC defaults to -mno-powerpc64.


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