])
+dnl CURL_CHECK_DEF_CC (SYMBOL, [INCLUDES], [SILENT])
+dnl -------------------------------------------------
+dnl Use the C compiler to find out only if the given symbol is defined
+dnl or not, this can not find out its expansion. This macro will not use
+dnl default includes even if no INCLUDES argument is given. This macro
+dnl will run silently when invoked with three arguments.
+
+AC_DEFUN([CURL_CHECK_DEF_CC], [
+ AS_VAR_PUSHDEF([ac_HaveDef], [curl_cv_have_def_$1])dnl
+ ifelse($3,,[AC_MSG_CHECKING([for compiler definition of $1])])
+ AC_COMPILE_IFELSE([
+ AC_LANG_SOURCE(
+ifelse($2,,,[$2])[[
+int main (void)
+{
+#ifdef $1
+ return 0;
+#else
+ force compilation error
+#endif
+}
+ ]])
+ ],[
+ tst_symbol_defined="yes"
+ ],[
+ tst_symbol_defined="no"
+ ])
+ if test "$tst_symbol_defined" = "yes"; then
+ AS_VAR_SET(ac_HaveDef, yes)
+ ifelse($3,,[AC_MSG_RESULT([yes])])
+ else
+ AS_VAR_SET(ac_HaveDef, no)
+ ifelse($3,,[AC_MSG_RESULT([no])])
+ fi
+ AS_VAR_POPDEF([ac_HaveDef])dnl
+])
+
+
dnl CARES_CHECK_AIX_ALL_SOURCE
dnl -------------------------------------------------
dnl Provides a replacement of traditional AC_AIX with