aclocal.m4

   1 dnl
   2 dnl Check for a symbol
   3 dnl
   4 AC_DEFUN(AC_CHECK_SYMBOL, [dnl
   5 AC_MSG_CHECKING(for $1)
   6 AC_CACHE_VAL(ac_cv_check_symbol_$1, [dnl
   7 AC_TRY_LINK(,
   8 changequote(,)dnl
   9 extern char *$1[]; puts(*$1);,
  10 changequote([,])dnl
  11             ac_cv_check_symbol_$1=yes, ac_cv_check_symbol_$1=no)])
  12 if test "$ac_cv_check_symbol_$1" = yes; then
  13 changequote(,)dnl
  14   ac_tr_symbol=`echo $1 | tr '[a-z]' '[A-Z]'`
  15 changequote([,])dnl
  16   AC_DEFINE_UNQUOTED(HAVE_${ac_tr_symbol})
  17 fi
  18 AC_MSG_RESULT($ac_cv_check_symbol_$1)])dnl
  19 dnl