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M4 Source File  |  2005-10-16  |  367 b   |  13 lines
  1. # From Ulrich Drepper.
  2.  
  3. # serial 1
  4.  
  5. AC_DEFUN([AM_TYPE_PTRDIFF_T],
  6.   [AC_CACHE_CHECK([for ptrdiff_t], am_cv_type_ptrdiff_t,
  7.      [AC_TRY_COMPILE([#include <stddef.h>], [ptrdiff_t p],
  8.              am_cv_type_ptrdiff_t=yes, am_cv_type_ptrdiff_t=no)])
  9.    if test $am_cv_type_ptrdiff_t = yes; then
  10.      AC_DEFINE(HAVE_PTRDIFF_T,1,[Define if system has ptrdiff_t type])
  11.    fi
  12. ])
  13.