From: oetiker <oetiker@a5681a0c-68f1-0310-ab6d-d61299d08faa>
Date: Thu, 23 Jun 2011 05:45:36 +0000 (+0000)
Subject: Fix for #304: checking for time_t is done with AC_RUN_IFELSE which fails when cross... 
X-Git-Url: https://git.tokkee.org/?a=commitdiff_plain;h=6ed43d1871dec39e4538d3698e3a350b2f8358d8;p=rrdtool-all.git

Fix for #304: checking for time_t is done with AC_RUN_IFELSE which fails when cross-compiling. The size of time_t can be detected with AC_CHECK_SIZEOF. -- Michael Olbrich


git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk@2186 a5681a0c-68f1-0310-ab6d-d61299d08faa
---

diff --git a/program/configure.ac b/program/configure.ac
index a5c9eaa3..10603bdb 100644
--- a/program/configure.ac
+++ b/program/configure.ac
@@ -499,27 +499,16 @@ dnl is time_t 32 of 64 bit ?
 AC_DEFINE([TIME_T_IS_32BIT], [], [time_t is 32bit])
 AC_DEFINE([TIME_T_IS_64BIT], [], [time_t is 64bit])
 AC_MSG_CHECKING([the type of time_t])
-AC_RUN_IFELSE(
-    AC_LANG_PROGRAM(
-        [[#include <time.h>]],
-        [[if (sizeof(time_t) != 4) return 1; ]]
-        ),
-    [ AC_MSG_RESULT([time_t is 32 bit])
-      AC_DEFINE([TIME_T_IS_32BIT])
-    ],
-    [ AC_RUN_IFELSE(
-        AC_LANG_PROGRAM(
-        [[#include <time.h>]],
-        [[if (sizeof(time_t) != 8) return 1; ]]
-        ),
-        [
-          AC_MSG_RESULT([time_t is 64 bit])
-          AC_DEFINE([TIME_T_IS_64BIT])
-        ],
-        [AC_MSG_ERROR([can not figure type of time_t])]
-      )
-    ]  
-)
+AC_CHECK_SIZEOF([time_t])
+if test "x$ac_cv_sizeof_time_t" = "x4"; then
+  AC_MSG_RESULT([time_t is 32 bit])
+  AC_DEFINE([TIME_T_IS_32BIT])
+elif test "x$ac_cv_sizeof_time_t" = "x8"; then
+  AC_MSG_RESULT([time_t is 64 bit])
+  AC_DEFINE([TIME_T_IS_64BIT])
+else
+  AC_MSG_ERROR([can not figure type of time_t])
+fi
 
 AC_LANG_POP(C)