This is the error when built with gcc-4.3 MAKE libnl.so.1.1 CC addr.c In file included from addr.c:28: ../include/netlink-local.h: In function '__str2type': ../include/netlink-local.h:218: error: 'ULONG_MAX' undeclared (first use in this function) ../include/netlink-local.h:218: error: (Each undeclared identifier is reported only once ../include/netlink-local.h:218: error: for each function it appears in.) ../include/netlink-local.h: In function '__list_str2type': ../include/netlink-local.h:239: error: 'ULONG_MAX' undeclared (first use in this function) make[2]: *** [addr.o] Error 1 make[1]: *** [all] Error 2 make: *** [all] Error 2 ==> ERROR: Build Failed. Aborting... Here is a fix: gcc-4.3.patch follows --- include/netlink-local.h~ 2008-01-14 10:48:45.000000000 -0500 +++ include/netlink-local.h 2009-04-25 08:16:28.981393890 -0400 @@ -27,6 +27,8 @@ #include <inttypes.h> #include <assert.h> +#include <limits.h> + #include <arpa/inet.h> #include <netdb.h> PKGBUILD changes: # $Id: PKGBUILD 930 2008-04-24 22:14:40Z jgc $ # Maintainer: Jan de Groot <jgc@archlinux.org> # Contributor: William Rea <sillywilly@gmail.com> pkgname=libnl pkgver=1.1 pkgrel=1 pkgdesc="Library for applications dealing with netlink sockets" arch=('i686' 'x86_64') url="http://people.suug.ch/~tgr/libnl" license=('GPL') depends=('glibc') source=(http://people.suug.ch/~tgr/${pkgname}/files/${pkgname}-${pkgver}.tar.gz gcc-4.3.patch) build() { cd ${startdir}/src/libnl-${pkgver} patch -Np0 -i ../gcc-4.3.patch || return 1 ./configure --prefix=/usr || return 1 make || return 1 make DESTDIR=${startdir}/pkg install || return 1 } md5sums=('ae970ccd9144e132b68664f98e7ceeb1' '6cb6edc341e6ffc3c50bd8fcd90e5c89')