# nl.m4 - Detect nl package

#

# Copyright (C) Mellanox Technologies Ltd. 2001-2020.  ALL RIGHTS RESERVED.

# See file LICENSE for terms.

#

##########################

# Checking nl library

#

AC_DEFUN([CHECK_NL_LIB],

[

# checking for libnl1 or libnl3 in libibverbs

if test -f "$ac_cv_ofed_path/lib64/libibverbs.so" ; then

	libibverbs_file="$ac_cv_ofed_path/lib64/libibverbs.so"

elif test -f "$(ls -d $ac_cv_ofed_path/lib/$(uname -m)-linux-*)/libibverbs.so" ; then

	libibverbs_file="$(ls -d $ac_cv_ofed_path/lib/$(uname -m)-linux-*)/libibverbs.so"

else

	libibverbs_file="$ac_cv_ofed_path/lib/libibverbs.so"

fi

PKG_CHECK_MODULES([LIBNL3],[libnl-route-3.0],[use_libnl3=yes] ,[use_libnl3=no])

PKG_CHECK_MODULES([LIBNL1],[libnl-1], [use_libnl1=yes] , [use_libnl1=no])

ldd $libibverbs_file | grep libnl >/dev/null 2>&1

if test $? -eq 0 ; then

	# When linking with libibverbs library, we must ensure that we pick the same version

	# of libnl that libibverbs picked.  Prefer libnl-3 unless libibverbs linked to libnl-1

	ldd $libibverbs_file | grep -e 'libnl3' -e 'libnl-3' >/dev/null 2>&1

	if test $? -eq 0 ; then

		# libnl3 case

		if test "$use_libnl3" == no; then

			AC_MSG_ERROR([libibverbs is linked with libnl3 while libnl3-devel\libnl3-route-devel are not installed. Please install libnl3-devel\libnl3-route-devel and try again])

		fi

		use_libnl1=no

	else

		# libnl1 case

		if test "$use_libnl1" == no; then

			AC_MSG_ERROR([libibverbs is linked with libnl1 while libnl1-devel is not installed. Please install libnl1-devel and try again])

		fi

		use_libnl3=no

	fi

fi

if test "$use_libnl3" == yes; then

	AC_SUBST([LIBNL_LIBS], "$LIBNL3_LIBS")

	AC_SUBST([LIBNL_CFLAGS], "$LIBNL3_CFLAGS")

	AC_SUBST([LIBNLX_DEVEL], "libnl3-devel")

	AC_DEFINE([HAVE_LIBNL3], [1], [Use libnl-3])

elif test "$use_libnl1" == yes; then

	AC_SUBST([LIBNL_LIBS], "$LIBNL1_LIBS")

	AC_SUBST([LIBNL_CFLAGS], "$LIBNL1_CFLAGS")

	AC_SUBST([LIBNLX_DEVEL], "libnl-devel")

	AC_DEFINE([HAVE_LIBNL1], [1], [Use libnl-1])

else

	AC_MSG_ERROR([libvma needs libnl3-devel,libnl3-route-devel\libnl1-devel (better libnl3)])

fi

])