50 lines
1.6 KiB
Diff
50 lines
1.6 KiB
Diff
From 4c86b3cbf52f810615d92835e98d83e9555a4d88 Mon Sep 17 00:00:00 2001
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From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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Date: Sun, 23 Nov 2014 12:13:47 +0100
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Subject: [PATCH 3/3] Improve check of the sysctl() function
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Since sysctl is a deprecated system call, new architectures such as
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ARC don't implement it. In such cases, uClibc installs the
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<sys/sysctl.h> header, but dos not implement the sysctl()
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function. This has the annoying side effect of breaking the sysctl
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detection of radvd, which is purely based on the header file being
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present.
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To fix this, this commit adds a check based on the existence of the
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sysctl() function.
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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---
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configure.ac | 1 +
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device-linux.c | 2 +-
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2 files changed, 2 insertions(+), 1 deletion(-)
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diff --git a/configure.ac b/configure.ac
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index 5dde3b2..5518f71 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -161,6 +161,7 @@ AC_CHECK_HEADERS( \
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time.h \
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)
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AC_HEADER_TIME
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+AC_CHECK_FUNCS([sysctl])
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dnl Checks for typedefs, structures, and compiler characteristics.
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AC_MSG_CHECKING(whether struct sockaddr_in6 has sin6_scope_id)
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diff --git a/device-linux.c b/device-linux.c
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index 1ecaa6b..d9b56b8 100644
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--- a/device-linux.c
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+++ b/device-linux.c
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@@ -183,7 +183,7 @@ int check_ip6_forwarding(void)
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value = -1;
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}
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-#ifdef HAVE_SYS_SYSCTL_H
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+#if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTL)
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int forw_sysctl[] = { SYSCTL_IP6_FORWARDING };
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size_t size = sizeof(value);
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if (!fp && sysctl(forw_sysctl, sizeof(forw_sysctl) / sizeof(forw_sysctl[0]), &value, &size, NULL, 0) < 0) {
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--
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2.1.0
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