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From: Jo-Philipp Wich <jo@mein.io>
Date: Fri, 6 Jan 2017 13:41:00 +0100
Subject: [PATCH] configure: allow overriding hardcoded /usr/include/libnl3
In a cross-compile setting we do not want to probe the host systems
/usr/include path, therfore allow to disable this include path by passing
ac_cv_header_netlink_netlink_h=yes to configure.
Also disable the testing for libraries providing nl_connect when
netsnmp_cv_func_nl_connect_LIBS is predefined since the proprietary
NETSNMP_SEARCH_LIBS() macro will clobber the internal link flags upon
encountering predefined cache variables, causing all subsequent configure
link tests to fail due to a stray "no" word getting passed to the linker.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
--- a/configure.d/config_os_libs2
+++ b/configure.d/config_os_libs2
@@ -226,14 +226,22 @@ if test "x$with_nl" != "xno"; then
case $target_os in
linux*) # Check for libnl (linux)
netsnmp_save_CPPFLAGS="$CPPFLAGS"
- CPPFLAGS="-I/usr/include/libnl3 $CPPFLAGS"
- NETSNMP_SEARCH_LIBS(nl_connect, nl-3,
- [AC_CHECK_HEADERS(netlink/netlink.h)
- EXTERNAL_MIBGROUP_INCLUDES="$EXTERNAL_MIBGROUP_INCLUDES -I/usr/include/libnl3"],
- [CPPFLAGS="$netsnmp_save_CPPFLAGS"], [], [], [LMIBLIBS])
+ netsnmp_netlink_include_flags=""
if test "x$ac_cv_header_netlink_netlink_h" != xyes; then
- NETSNMP_SEARCH_LIBS(nl_connect, nl, [
- AC_CHECK_HEADERS(netlink/netlink.h)], [], [], LMIBLIBS)
+ netsnmp_netlink_include_flags="-I/usr/include/libnl3"
+ fi
+ CPPFLAGS="$netsnmp_netlink_include_flags $CPPFLAGS"
+ if test "x$netsnmp_cv_func_nl_connect_LIBS" = x; then
+ NETSNMP_SEARCH_LIBS(nl_connect, nl-3,
+ [AC_CHECK_HEADERS(netlink/netlink.h)
+ EXTERNAL_MIBGROUP_INCLUDES="$EXTERNAL_MIBGROUP_INCLUDES $netsnmp_netlink_include_flags"],
+ [CPPFLAGS="$netsnmp_save_CPPFLAGS"], [], [], [LMIBLIBS])
+ if test "x$ac_cv_header_netlink_netlink_h" != xyes; then
+ NETSNMP_SEARCH_LIBS(nl_connect, nl, [
+ AC_CHECK_HEADERS(netlink/netlink.h)], [], [], LMIBLIBS)
+ fi
+ else
+ LMIBLIBS="$LMIBLIBS $netsnmp_cv_func_nl_connect_LIBS"
fi
if test "x$ac_cv_header_netlink_netlink_h" = xyes; then
AC_EGREP_HEADER([nl_socket_free], [netlink/socket.h],