Fixed possible preprocessor error if ULLONG_MAX is not digits-only

2 files changed, 2 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index 3ee40378..49556ebd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1117,6 +1117,7 @@ AC_CHECK_SIZEOF([size_t], [],
 #include <stdio.h>
   ]]
 )
+AC_CHECK_SIZEOF([unsigned long long], [], [[#include <stdint.h>]])
 
 AC_CHECK_HEADERS([dlfcn.h],[have_tlsplugin=yes],[have_tlsplugin=no], [AC_INCLUDES_DEFAULT])
 AM_CONDITIONAL([MHD_HAVE_TLS_PLUGIN], [[test "x$have_tlsplugin" = xyes]])
diff --git a/src/microhttpd/daemon.c b/src/microhttpd/daemon.c
index faf12c08..679bfbcb 100644
--- a/src/microhttpd/daemon.c
+++ b/src/microhttpd/daemon.c
@@ -3921,7 +3921,7 @@ MHD_get_timeout (struct MHD_Daemon *daemon,
       const uint64_t mssecond_left = earliest_tmot_conn->connection_timeout_ms
                                      - since_actv;
 
-#if UINT64_MAX != ULLONG_MAX
+#if SIZEOF_UINT64_T > SIZEOF_UNSIGNED_LONG_LONG
       if (mssecond_left > ULLONG_MAX)
         *timeout = ULLONG_MAX;
       else