source/lib/ldb/aclocal.m4

   1 dnl see if a declaration exists for a function or variable
   2 dnl defines HAVE_function_DECL if it exists
   3 dnl AC_HAVE_DECL(var, includes)
   4 AC_DEFUN(AC_HAVE_DECL,
   5 [
   6  AC_CACHE_CHECK([for $1 declaration],ac_cv_have_$1_decl,[
   7     AC_TRY_COMPILE([$2],[int i = (int)$1],
   8         ac_cv_have_$1_decl=yes,ac_cv_have_$1_decl=no)])
   9  if test x"$ac_cv_have_$1_decl" = x"yes"; then
  10     AC_DEFINE([HAVE_]translit([$1], [a-z], [A-Z])[_DECL],1,[Whether $1() is available])
  11  fi
  12 ])