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glibc  2.9
wordsize.h
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00001 /* Determine the wordsize from the preprocessor defines.  */
00002 
00003 #if defined __powerpc64__
00004 # define __WORDSIZE  64
00005 # define __WORDSIZE_COMPAT32       1
00006 #else
00007 # define __WORDSIZE  32
00008 #endif
00009 
00010 #if !defined __NO_LONG_DOUBLE_MATH && !defined __LONG_DOUBLE_MATH_OPTIONAL
00011 
00012 /* Signal the glibc ABI didn't used to have a `long double'.
00013    The changes all the `long double' function variants to be redirects
00014    to the double functions.  */
00015 # define __LONG_DOUBLE_MATH_OPTIONAL   1
00016 # ifndef __LONG_DOUBLE_128__
00017 #  define __NO_LONG_DOUBLE_MATH        1
00018 # endif
00019 #endif