ac_c_long_long_

Provides a test for the existance of the long long int type and defines HAVE_LONG_LONG if it is found.

change: add a comment for the ac_define <guidod>

AC_DEFUN([AC_C_LONG_LONG_],
[AC_CACHE_CHECK(for long long int, ac_cv_c_long_long,
[if test "$GCC" = yes; then
  ac_cv_c_long_long=yes
  else
        AC_TRY_COMPILE(,[long long int i;],
   ac_cv_c_long_long=yes,
   ac_cv_c_long_long=no)
   fi])
   if test $ac_cv_c_long_long = yes; then
     AC_DEFINE(HAVE_LONG_LONG, 1, [compiler understands long long])
   fi
])

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