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From e6fbad0c122ba8e87b67a9e2447505adcaafe204 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Wed, 29 Mar 2017 16:31:38 -0700
Subject: [PATCH] Remove runtime check for CLOCK_MONOTONIC
Does not work during cross compile
use a compile-time check to detect whether the
monotonic clock is available. This check can run just fine when we are
cross-compiling.
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
configure.ac | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/configure.ac b/configure.ac
index fa13ae6..f4f0f46 100644
--- a/configure.ac
+++ b/configure.ac
@@ -175,9 +175,17 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
)
AC_MSG_CHECKING(for a working clock_getres(CLOCK_MONOTONIC, &ts))
-AC_RUN_IFELSE([AC_LANG_PROGRAM(
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[[#include <time.h>]],
-[[struct timespec ts; if(clock_getres(CLOCK_MONOTONIC, &ts)) return -1;]])],
+[[
+#include <unistd.h>
+int main() {
+#if !(defined(_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 && defined(CLOCK_MONOTONIC))
+ #error No monotonic clock
+#endif
+ return 0;
+
+]])],
[
AC_MSG_RESULT([yes])
AC_DEFINE_UNQUOTED([HAVE_CLOCK_GETRES_MONOTONIC], 1, [Define to 1 if clock_getres(CLOCK_MONOTONIC, &ts) works])
--
2.12.1
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