diff -ur libnasl-2.0.12.old/configure.in libnasl-2.0.12/configure.in
--- libnasl-2.0.12.old/configure.in	2004-08-11 15:49:29.000000000 +0200
+++ libnasl-2.0.12/configure.in	2004-08-11 15:54:17.000000000 +0200
@@ -198,7 +198,7 @@
 
 dnl Check that the struct ip has member ip_csum
 AC_MSG_CHECKING([struct ip contains ip_csum])
-AC_TRY_COMPILE([#ifdef __linux__
+AC_TRY_COMPILE([#if defined(__linux__) || defined(__GNU__) || defined(__GLIBC__)
 #define __BSD_SOURCE
 #define _BSD_SOURCE
 #define __FAVOR_BSD
@@ -257,7 +257,7 @@
 [AC_MSG_RESULT(no)])
 
 AC_MSG_CHECKING([BSD struct udphdr])
-AC_TRY_COMPILE([#ifdef __linux__
+AC_TRY_COMPILE([#if defined(__linux__) || defined(__GNU__) || defined(__GLIBC__)
 #define __BSD_SOURCE
 #define _BSD_SOURCE
 #define __FAVOR_BSD
@@ -284,7 +284,7 @@
 
 AC_MSG_CHECKING([struct tcphdr has th_off])
 AC_TRY_COMPILE([#include <sys/types.h>
-#ifdef __linux__
+#if defined(__linux__) || defined(__GNU__) || defined(__GLIBC__)
 #define __FAVOR_BSD
 #endif
 #include <netinet/in.h>
@@ -297,7 +297,7 @@
 
 AC_MSG_CHECKING([struct tcphdr has th_x2_off])
 AC_TRY_COMPILE([#include <sys/types.h>
-#ifdef __linux__
+#if defined(__linux__) || defined(__GNU__) || defined(__GLIBC__)
 #define __FAVOR_BSD
 #endif
 #include <netinet/in.h>
diff -ur libnasl-2.0.12.old/include/nasl_raw.h libnasl-2.0.12/include/nasl_raw.h
--- libnasl-2.0.12.old/include/nasl_raw.h	1999-06-12 15:03:32.000000000 +0200
+++ libnasl-2.0.12/include/nasl_raw.h	2004-08-11 15:55:05.000000000 +0200
@@ -1,6 +1,6 @@
 #ifndef NESSUS_RAW_H
 #define NESSUS_RAW_H
-#ifdef __linux__
+#if defined(__linux__) || defined(__GNU__) || defined(__GLIBC__)
 #ifndef __BSD_SOURCE
 #define __BSD_SOURCE
 #endif