# -*- shell-script -*-
#
# Copyright (C) 2015-2017 Mellanox Technologies, Inc.
#                         All rights reserved.
# Copyright (c) 2015      Research Organization for Information Science
#                         and Technology (RIST). All rights reserved.
# Copyright (c) 2016      Los Alamos National Security, LLC. All rights
#                         reserved.
# Copyright (c) 2016 Cisco Systems, Inc.  All rights reserved.
# $COPYRIGHT$
#
# Additional copyrights may follow
#
# $HEADER$
#

# OMPI_CHECK_UCX(prefix, [action-if-found], [action-if-not-found])
# --------------------------------------------------------
# check if UCX support can be found.  sets prefix_{CPPFLAGS,
# LDFLAGS, LIBS} as needed and runs action-if-found if there is
# support, otherwise executes action-if-not-found
AC_DEFUN([OMPI_CHECK_UCX],[
    OPAL_VAR_SCOPE_PUSH([ompi_check_ucx_dir])

    AS_IF([test -z "$ompi_check_ucx_happy"],
          [AC_ARG_WITH([ucx],
		       [AC_HELP_STRING([--with-ucx(=DIR)],
				       [Build with Unified Communication X library support])])
	   OPAL_CHECK_WITHDIR([ucx], [$with_ucx], [include/ucp/api/ucp.h])
	   AC_ARG_WITH([ucx-libdir],
		       [AC_HELP_STRING([--with-ucx-libdir=DIR],
				       [Search for Unified Communication X libraries in DIR])])
	   OPAL_CHECK_WITHDIR([ucx-libdir], [$with_ucx_libdir], [libucp.*])

	   AS_IF([test "$with_ucx" != "no"],
                 [AS_IF([test -n "$with_ucx" && test "$with_ucx" != "yes"],
                        [ompi_check_ucx_dir="$with_ucx"],
                        [PKG_CHECK_MODULES_STATIC([ucx],[ucx],
                                             [ompi_check_ucx_dir=`$PKG_CONFIG --variable=prefix ucx`
                                              AS_IF([test "$ompi_check_ucx_dir" = "/usr"],
                                                    [ompi_check_ucx_dir=])],
                                             [true])])
                  ompi_check_ucx_happy="no"
                  AS_IF([test -z "$ompi_check_ucx_dir"],
                        [OPAL_CHECK_PACKAGE([ompi_check_ucx],
                                   [ucp/api/ucp.h],
                                   [ucp],
                                   [ucp_cleanup],
                                   [-luct -lucm -lucs],
                                   [],
                                   [],
                                   [ompi_check_ucx_happy="yes"],
                                   [ompi_check_ucx_happy="no"])
                         AS_IF([test "$ompi_check_ucx_happy" = yes],
                               [AC_MSG_CHECKING(for UCX version compatibility)
                                AC_REQUIRE_CPP
                                AC_COMPILE_IFELSE(
                                    [AC_LANG_PROGRAM([[#include <uct/api/version.h>]],[[]])],
                                    [ompi_check_ucx_happy="yes"],
                                    [ompi_check_ucx_happy="no"])

                                AC_MSG_RESULT([$ompi_check_ucx_happy])])
                         AS_IF([test "$ompi_check_ucx_happy" = "no"],
                               [ompi_check_ucx_dir=/opt/ucx])])
                  AS_IF([test "$ompi_check_ucx_happy" != yes],
                        [AS_IF([test -n "$with_ucx_libdir"],
                               [ompi_check_ucx_libdir="$with_ucx_libdir"],
                               [files=`ls $ompi_check_ucx_dir/lib64/libucp.* 2> /dev/null | wc -l`
                                AS_IF([test "$files" -gt 0],
                                      [ompi_check_ucx_libdir=$ompi_check_ucx_dir/lib64],
                                      [ompi_check_ucx_libdir=$ompi_check_ucx_dir/lib])])

                         ompi_check_ucx_$1_save_CPPFLAGS="$CPPFLAGS"
                         ompi_check_ucx_$1_save_LDFLAGS="$LDFLAGS"
                         ompi_check_ucx_$1_save_LIBS="$LIBS"

                         OPAL_CHECK_PACKAGE([ompi_check_ucx],
                                            [ucp/api/ucp.h],
                                            [ucp],
                                            [ucp_cleanup],
                                            [-luct -lucm -lucs],
                                            [$ompi_check_ucx_dir],
                                            [$ompi_check_ucx_libdir],
                                            [ompi_check_ucx_happy="yes"],
                                            [ompi_check_ucx_happy="no"])

                         CPPFLAGS="$ompi_check_ucx_$1_save_CPPFLAGS"
                         LDFLAGS="$ompi_check_ucx_$1_save_LDFLAGS"
                         LIBS="$ompi_check_ucx_$1_save_LIBS"

                         AS_IF([test "$ompi_check_ucx_happy" = yes],
                               [AC_MSG_CHECKING(for UCX version compatibility)
                                AC_REQUIRE_CPP
                                old_CPPFLAGS="$CPPFLAGS"
                                CPPFLAGS="$CPPFLAGS -I$ompi_check_ucx_dir/include"
                                AC_COMPILE_IFELSE(
                                    [AC_LANG_PROGRAM([[#include <uct/api/version.h>]],[[]])],
                                    [ompi_check_ucx_happy="yes"],
                                    [ompi_check_ucx_happy="no"])

                                AC_MSG_RESULT([$ompi_check_ucx_happy])
                                CPPFLAGS=$old_CPPFLAGS])])

                  old_CPPFLAGS="$CPPFLAGS"
                  AS_IF([test -n "$ompi_check_ucx_dir"],
                        [CPPFLAGS="$CPPFLAGS -I$ompi_check_ucx_dir/include"])
                  AC_CHECK_DECLS([ucp_tag_send_nbr],
                                 [AC_DEFINE([HAVE_UCP_TAG_SEND_NBR],[1],
                                            [have ucp_tag_send_nbr()])], [],
                                 [#include <ucp/api/ucp.h>])
                  AC_CHECK_DECLS([ucp_ep_flush_nb, ucp_worker_flush_nb,
                                  ucp_request_check_status, ucp_put_nb, ucp_get_nb],
                                 [], [],
                                 [#include <ucp/api/ucp.h>])
                  AC_CHECK_DECLS([ucm_test_events],
                                 [], [],
                                 [#include <ucm/api/ucm.h>])
                  AC_CHECK_DECLS([UCP_ATOMIC_POST_OP_AND,
                                  UCP_ATOMIC_POST_OP_OR,
                                  UCP_ATOMIC_POST_OP_XOR,
                                  UCP_ATOMIC_FETCH_OP_FAND,
                                  UCP_ATOMIC_FETCH_OP_FOR,
                                  UCP_ATOMIC_FETCH_OP_FXOR,
                                  UCP_PARAM_FIELD_ESTIMATED_NUM_PPN],
                                 [], [],
                                 [#include <ucp/api/ucp.h>])
                  AC_CHECK_DECLS([UCP_WORKER_ATTR_FIELD_ADDRESS_FLAGS],
                                 [AC_DEFINE([HAVE_UCP_WORKER_ADDRESS_FLAGS], [1],
                                            [have worker address attribute])], [],
                                 [#include <ucp/api/ucp.h>])
                  CPPFLAGS=$old_CPPFLAGS

                  OPAL_SUMMARY_ADD([[Transports]],[[Open UCX]],[$1],[$ompi_check_ucx_happy])])])

    AS_IF([test "$ompi_check_ucx_happy" = "yes"],
          [$1_CPPFLAGS="[$]$1_CPPFLAGS $ompi_check_ucx_CPPFLAGS"
           $1_LDFLAGS="[$]$1_LDFLAGS $ompi_check_ucx_LDFLAGS"
           $1_LIBS="[$]$1_LIBS $ompi_check_ucx_LIBS"
           $2],
          [AS_IF([test ! -z "$with_ucx" && test "$with_ucx" != "no"],
                 [AC_MSG_ERROR([UCX support requested but not found.  Aborting])])
           $3])

    OPAL_VAR_SCOPE_POP
])