From: Francis Dupont <fdupont@isc.org>
Date: Wed, 15 Jul 2020 19:46:39 +0000 (+0200)
Subject: [#1174] Fixed the same duration type bug
X-Git-Tag: Kea-1.7.10~45
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c6f9579852f94e73bb213c3a2ad772b8d4863e74;p=thirdparty%2Fkea.git

[#1174] Fixed the same duration type bug
---

diff --git a/configure.ac b/configure.ac
index c4ed915a8d..d162879d62 100755
--- a/configure.ac
+++ b/configure.ac
@@ -172,6 +172,21 @@ AC_COMPILE_IFELSE(
     [Define to 1 if std::is_base_of is available])],
     [AC_MSG_RESULT(no)])
 
+# Check if system and steady clocks use the same duration type.
+AC_MSG_CHECKING([for different std::chrono::duration types])
+AC_COMPILE_IFELSE(
+    [AC_LANG_PROGRAM(
+        [#include <chrono>
+        #include <type_traits>]
+	[static_assert(!std::is_same<
+                           std::chrono::system_clock::duration,
+	                   std::chrono::steady_clock::duration
+			            >::value, "");])],
+    [AC_MSG_RESULT(yes)],
+    [AC_MSG_RESULT(no)
+    AC_DEFINE([CHRONO_SAME_DURATION], [1],
+    [Define to 1 if system and steady clocks use the same duration type])])
+
 dnl Determine if we are using GNU sed
 GNU_SED=no
 $SED --version 2> /dev/null | grep GNU > /dev/null 2>&1
diff --git a/src/lib/util/chrono_time_utils.cc b/src/lib/util/chrono_time_utils.cc
index 1bc3a13a7c..6c76112fd4 100644
--- a/src/lib/util/chrono_time_utils.cc
+++ b/src/lib/util/chrono_time_utils.cc
@@ -92,9 +92,11 @@ template std::string
 durationToText<system_clock::duration>(system_clock::duration dur,
                                        size_t fsecs_precision);
 
+#if !CHRONO_SAME_DURATION
 template std::string
 durationToText<steady_clock::duration>(steady_clock::duration dur,
                                        size_t fsecs_precision);
+#endif
 
 } // end of isc::util namespace
 } // end of isc namespace