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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 __s390x__
00004 # define __WORDSIZE  64
00005 #else
00006 # define __WORDSIZE  32
00007 #endif
00008 
00009 #if !defined __NO_LONG_DOUBLE_MATH && !defined __LONG_DOUBLE_MATH_OPTIONAL
00010 
00011 /* Signal that we didn't used to have a `long double'. The changes all
00012    the `long double' function variants to be redirects to the double
00013    functions.  */
00014 # define __LONG_DOUBLE_MATH_OPTIONAL   1
00015 # ifndef __LONG_DOUBLE_128__
00016 #  define __NO_LONG_DOUBLE_MATH        1
00017 # endif
00018 #endif