From 8d46dbfb1e88c0caa6480c0e1e1504f179c6e807 Mon Sep 17 00:00:00 2001
From: brain <brain@e03df62e-2008-0410-955e-edbf42e46eb7>
Date: Thu, 19 Jul 2007 21:44:46 +0000
Subject: Check libc version for epoll then check that glibc is built against
 this kernel version, if not dont allow epoll

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@7475 e03df62e-2008-0410-955e-edbf42e46eb7
---
 configure | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

(limited to 'configure')

diff --git a/configure b/configure
index 1104d4209..a257efa48 100755
--- a/configure
+++ b/configure
@@ -474,6 +474,40 @@ if ($has_epoll) {
 	if (($kernel =~ /^2\.0\./) || ($kernel =~ /^2\.2\./) || ($kernel =~ /^2\.4\./)) {
 		$has_epoll = 0;
 	}
+	else
+	{
+		# Suggestion from nenolod, weed out odd systems which have glibc built
+		# against 2.4 kernels (ick)
+
+		$libcv = 0.0;
+		$kernelv = 0.0;
+		open (FH,"/lib/libc.so.6|") or $has_epoll = 0;
+		if ($has_epoll)
+		{
+			while (chomp($line = <FH>))
+			{
+				if ($line =~ /GNU C Library .* version (.*?) /)
+				{
+					$libcv = $1;
+				}
+				elsif ($line =~ /Compiled on a Linux (.*?\..*?)\.* system/)
+				{
+					$kernelv = $1;
+				}
+			}
+			close FH;
+			if ($libcv < 2.3)
+			{
+				$has_epoll = 0;
+				printf "libc too old: $libcv... ";
+			}
+			if ($kernelv < 2.6)
+			{
+				$has_epoll = 0;
+				printf "libc built against older kernel $kernelv... ";
+			}
+		}
+	}
 }
 print "yes\n" if $has_epoll == 1;
 print "no\n" if $has_epoll == 0;
-- 
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