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# From Ulrich Drepper.
# serial 1
AC_DEFUN(AM_TYPE_PTRDIFF_T,
[AC_CACHE_CHECK([for ptrdiff_t], am_cv_type_ptrdiff_t,
[AC_TRY_COMPILE([#include <stddef.h>], [ptrdiff_t p],
am_cv_type_ptrdiff_t=yes, am_cv_type_ptrdiff_t=no)])
if test $am_cv_type_ptrdiff_t = yes; then
AC_DEFINE(HAVE_PTRDIFF_T,1,[Define if system has ptrdiff_t type])
fi
])
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