CC$gfloat

 When you compile using the /G_FLOAT qualifier, CC$gfloat is defined
 as 1.  When you compile without the /G_FLOAT qualifier, CC$gfloat
 is defined as 0.  The CC$gfloat macro is provided for compatiblity
 with VAX C.  The __G_FLOAT predefined macro should be used instead.