modules/http2/config2.m4 - httpd - Git at Google


            
            dnl Licensed to the Apache Software Foundation (ASF) under one or more

            
            dnl contributor license agreements.  See the NOTICE file distributed with

            
            dnl this work for additional information regarding copyright ownership.

            
            dnl The ASF licenses this file to You under the Apache License, Version 2.0

            
            dnl (the "License"); you may not use this file except in compliance with

            
            dnl the License.  You may obtain a copy of the License at

            
            dnl

            
            dnl      http://www.apache.org/licenses/LICENSE-2.0

            
            dnl

            
            dnl Unless required by applicable law or agreed to in writing, software

            
            dnl distributed under the License is distributed on an "AS IS" BASIS,

            
            dnl WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

            
            dnl See the License for the specific language governing permissions and

            
            dnl limitations under the License.


            dnl #  start of module specific part

            
            APACHE_MODPATH_INIT(http2)


            dnl #  list of module object files

            
            http2_objs="dnl

            
            mod_http2.lo dnl

            
            h2_bucket_beam.lo dnl

            
            h2_bucket_eos.lo dnl

            
            h2_c1.lo dnl

            
            h2_c1_io.lo dnl

            
            h2_c2.lo dnl

            
            h2_c2_filter.lo dnl

            
            h2_config.lo dnl

            
            h2_conn_ctx.lo dnl

            
            h2_headers.lo dnl

            
            h2_mplx.lo dnl

            
            h2_protocol.lo dnl

            
            h2_push.lo dnl

            
            h2_request.lo dnl

            
            h2_session.lo dnl

            
            h2_stream.lo dnl

            
            h2_switch.lo dnl

            
            h2_util.lo dnl

            
            h2_workers.lo dnl

            
            h2_ws.lo dnl

            
            "


            dnl

            
            dnl APACHE_CHECK_NGHTTP2

            
            dnl

            
            dnl Configure for nghttp2, giving preference to

            
            dnl "--with-nghttp2=<path>" if it was specified.

            
            dnl

            
            AC_DEFUN([APACHE_CHECK_NGHTTP2],[

            
              AC_CACHE_CHECK([for nghttp2], [ac_cv_nghttp2], [

            
                dnl initialise the variables we use

            
                ac_cv_nghttp2=no

            
                ap_nghttp2_found=""

            
                ap_nghttp2_base=""

            
                ap_nghttp2_libs=""


                dnl Determine the nghttp2 base directory, if any

            
                AC_MSG_CHECKING([for user-provided nghttp2 base directory])

            
                AC_ARG_WITH(nghttp2, APACHE_HELP_STRING(--with-nghttp2=PATH, nghttp2 installation directory), [

            
                  dnl If --with-nghttp2 specifies a directory, we use that directory

            
                  if test "x$withval" != "xyes" -a "x$withval" != "x"; then

            
                    dnl This ensures $withval is actually a directory and that it is absolute

            
                    ap_nghttp2_base="`cd $withval ; pwd`"

            
                  fi

            
                ])

            
                if test "x$ap_nghttp2_base" = "x"; then

            
                  AC_MSG_RESULT(none)

            
                else

            
                  AC_MSG_RESULT($ap_nghttp2_base)

            
                fi


                dnl Run header and version checks

            
                saved_CPPFLAGS="$CPPFLAGS"

            
                saved_LIBS="$LIBS"

            
                saved_LDFLAGS="$LDFLAGS"


                dnl Before doing anything else, load in pkg-config variables

            
                if test -n "$PKGCONFIG"; then

            
                  saved_PKG_CONFIG_PATH="$PKG_CONFIG_PATH"

            
                  AC_MSG_CHECKING([for pkg-config along $PKG_CONFIG_PATH])

            
                  if test "x$ap_nghttp2_base" != "x" ; then

            
                    if test -f "${ap_nghttp2_base}/lib/pkgconfig/libnghttp2.pc"; then

            
                      dnl Ensure that the given path is used by pkg-config too, otherwise

            
                      dnl the system libnghttp2.pc might be picked up instead.

            
                      PKG_CONFIG_PATH="${ap_nghttp2_base}/lib/pkgconfig${PKG_CONFIG_PATH+:}${PKG_CONFIG_PATH}"

            
                      export PKG_CONFIG_PATH

            
                    elif test -f "${ap_nghttp2_base}/lib64/pkgconfig/libnghttp2.pc"; then

            
                      dnl Ensure that the given path is used by pkg-config too, otherwise

            
                      dnl the system libnghttp2.pc might be picked up instead.

            
                      PKG_CONFIG_PATH="${ap_nghttp2_base}/lib64/pkgconfig${PKG_CONFIG_PATH+:}${PKG_CONFIG_PATH}"

            
                      export PKG_CONFIG_PATH

            
                    fi

            
                  fi

            
                  AC_ARG_ENABLE(nghttp2-staticlib-deps,APACHE_HELP_STRING(--enable-nghttp2-staticlib-deps,[link mod_http2 with dependencies of libnghttp2's static libraries (as indicated by "pkg-config --static"). Must be specified in addition to --enable-http2.]), [

            
                    if test "$enableval" = "yes"; then

            
                      PKGCONFIG_LIBOPTS="--static"

            
                    fi

            
                  ])

            
                  ap_nghttp2_libs="`$PKGCONFIG $PKGCONFIG_LIBOPTS --libs-only-l --silence-errors libnghttp2`"

            
                  if test $? -eq 0; then

            
                    ap_nghttp2_found="yes"

            
                    pkglookup="`$PKGCONFIG --cflags-only-I libnghttp2`"

            
                    APR_ADDTO(CPPFLAGS, [$pkglookup])

            
                    APR_ADDTO(MOD_CFLAGS, [$pkglookup])

            
                    pkglookup="`$PKGCONFIG $PKGCONFIG_LIBOPTS --libs-only-L libnghttp2`"

            
                    APR_ADDTO(LDFLAGS, [$pkglookup])

            
                    APR_ADDTO(MOD_LDFLAGS, [$pkglookup])

            
                    pkglookup="`$PKGCONFIG $PKGCONFIG_LIBOPTS --libs-only-other libnghttp2`"

            
                    APR_ADDTO(LDFLAGS, [$pkglookup])

            
                    APR_ADDTO(MOD_LDFLAGS, [$pkglookup])

            
                  fi

            
                  PKG_CONFIG_PATH="$saved_PKG_CONFIG_PATH"

            
                fi


                dnl fall back to the user-supplied directory if not found via pkg-config

            
                if test "x$ap_nghttp2_base" != "x" -a "x$ap_nghttp2_found" = "x"; then

            
                  APR_ADDTO(CPPFLAGS, [-I$ap_nghttp2_base/include])

            
                  APR_ADDTO(MOD_CFLAGS, [-I$ap_nghttp2_base/include])

            
                  APR_ADDTO(LDFLAGS, [-L$ap_nghttp2_base/lib])

            
                  APR_ADDTO(MOD_LDFLAGS, [-L$ap_nghttp2_base/lib])

            
                  if test "x$ap_platform_runtime_link_flag" != "x"; then

            
                    APR_ADDTO(LDFLAGS, [$ap_platform_runtime_link_flag$ap_nghttp2_base/lib])

            
                    APR_ADDTO(MOD_LDFLAGS, [$ap_platform_runtime_link_flag$ap_nghttp2_base/lib])

            
                  fi

            
                fi


                AC_MSG_CHECKING([for nghttp2 version >= 1.2.1])

            
                AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <nghttp2/nghttp2ver.h>]],[[

            
            #if !defined(NGHTTP2_VERSION_NUM)

            
            #error "Missing nghttp2 version"

            
            #endif

            
            #if NGHTTP2_VERSION_NUM < 0x010201

            
            #error "Unsupported nghttp2 version " NGHTTP2_VERSION_TEXT

            
            #endif]])],

            
                  [AC_MSG_RESULT(OK)

            
                   ac_cv_nghttp2=yes],

            
                  [AC_MSG_RESULT(FAILED)])


                if test "x$ac_cv_nghttp2" = "xyes"; then

            
                  ap_nghttp2_libs="${ap_nghttp2_libs:--lnghttp2} `$apr_config --libs`"

            
                  APR_ADDTO(MOD_LDFLAGS, [$ap_nghttp2_libs])

            
                  APR_ADDTO(LIBS, [$ap_nghttp2_libs])


                  dnl Run library and function checks

            
                  liberrors=""

            
                  AC_CHECK_HEADERS([nghttp2/nghttp2.h])

            
                  AC_CHECK_FUNCS([nghttp2_session_server_new2], [], [liberrors="yes"])

            
                  if test "x$liberrors" != "x"; then

            
                    AC_MSG_WARN([nghttp2 library is unusable])

            
                  fi

            
            dnl # nghttp2 >= 1.3.0: access to stream weights

            
                  AC_CHECK_FUNCS([nghttp2_stream_get_weight], [], [liberrors="yes"])

            
                  if test "x$liberrors" != "x"; then

            
                    AC_MSG_WARN([nghttp2 version >= 1.3.0 is required])

            
                  fi

            
            dnl # nghttp2 >= 1.5.0: changing stream priorities

            
                  AC_CHECK_FUNCS([nghttp2_session_change_stream_priority],

            
                    [APR_ADDTO(MOD_CPPFLAGS, ["-DH2_NG2_CHANGE_PRIO"])], [])

            
            dnl # nghttp2 >= 1.14.0: invalid header callback

            
                  AC_CHECK_FUNCS([nghttp2_session_callbacks_set_on_invalid_header_callback],

            
                    [APR_ADDTO(MOD_CPPFLAGS, ["-DH2_NG2_INVALID_HEADER_CB"])], [])

            
            dnl # nghttp2 >= 1.15.0: get/set stream window sizes

            
                  AC_CHECK_FUNCS([nghttp2_session_get_stream_local_window_size],

            
                    [APR_ADDTO(MOD_CPPFLAGS, ["-DH2_NG2_LOCAL_WIN_SIZE"])], [])

            
            dnl # nghttp2 >= 1.15.0: don't keep info on closed streams

            
                  AC_CHECK_FUNCS([nghttp2_option_set_no_closed_streams],

            
                    [APR_ADDTO(MOD_CPPFLAGS, ["-DH2_NG2_NO_CLOSED_STREAMS"])], [])

            
            dnl # nghttp2 >= 1.50.0: rfc9113 leading/trailing whitespec strictness

            
                  AC_CHECK_FUNCS([nghttp2_option_set_no_rfc9113_leading_and_trailing_ws_validation],

            
                    [APR_ADDTO(MOD_CPPFLAGS, ["-DH2_NG2_RFC9113_STRICTNESS"])], [])

            
                else

            
                  AC_MSG_WARN([nghttp2 version is too old])

            
                fi


                dnl restore

            
                CPPFLAGS="$saved_CPPFLAGS"

            
                LIBS="$saved_LIBS"

            
                LDFLAGS="$saved_LDFLAGS"

            
              ])

            
              if test "x$ac_cv_nghttp2" = "xyes"; then

            
                AC_DEFINE(HAVE_NGHTTP2, 1, [Define if nghttp2 is available])

            
              fi

            
            ])


            dnl # hook module into the Autoconf mechanism (--enable-http2)

            
            APACHE_MODULE(http2, [HTTP/2 protocol handling in addition to HTTP protocol

            
            handling. Implemented by mod_http2. This module requires a libnghttp2 installation.

            
            See --with-nghttp2 on how to manage non-standard locations. This module

            
            is usually linked shared and requires loading. ], $http2_objs, , most, [

            
                APACHE_CHECK_OPENSSL

            
                if test "$ac_cv_openssl" = "yes" ; then

            
                    APR_ADDTO(MOD_CPPFLAGS, ["-DH2_OPENSSL"])

            
                fi


                APACHE_CHECK_NGHTTP2

            
                if test "$ac_cv_nghttp2" = "yes" ; then

            
                    if test "x$enable_http2" = "xshared"; then

            
                       # The only symbol which needs to be exported is the module

            
                       # structure, so ask libtool to hide everything else:

            
                       APR_ADDTO(MOD_HTTP2_LDADD, [-export-symbols-regex http2_module])

            
                    fi

            
                else

            
                    enable_http2=no

            
                fi

            
            ])


            # Ensure that other modules can pick up mod_http2.h

            
            # icing: hold back for now until it is more stable

            
            #APR_ADDTO(INCLUDES, [-I\$(top_srcdir)/$modpath_current])


            dnl #  list of module object files

            
            proxy_http2_objs="dnl

            
            mod_proxy_http2.lo dnl

            
            h2_proxy_session.lo dnl

            
            h2_proxy_util.lo dnl

            
            "


            dnl # hook module into the Autoconf mechanism (--enable-proxy_http2)

            
            APACHE_MODULE(proxy_http2, [HTTP/2 proxy module. This module requires a libnghttp2 installation.

            
            See --with-nghttp2 on how to manage non-standard locations. Also requires --enable-proxy.], $proxy_http2_objs, , no, [

            
                APACHE_CHECK_NGHTTP2

            
                if test "$ac_cv_nghttp2" = "yes" ; then

            
                    if test "x$enable_http2" = "xshared"; then

            
                       # The only symbol which needs to be exported is the module

            
                       # structure, so ask libtool to hide everything else:

            
                       APR_ADDTO(MOD_PROXY_HTTP2_LDADD, [-export-symbols-regex proxy_http2_module])

            
                    fi

            
                else

            
                    enable_proxy_http2=no

            
                fi

            
            ], proxy)


            dnl #  end of module specific part

            
            APACHE_MODPATH_FINISH
	dnl Licensed to the Apache Software Foundation (ASF) under one or more
	dnl contributor license agreements. See the NOTICE file distributed with
	dnl this work for additional information regarding copyright ownership.
	dnl The ASF licenses this file to You under the Apache License, Version 2.0
	dnl (the "License"); you may not use this file except in compliance with
	dnl the License. You may obtain a copy of the License at
	dnl
	dnl http://www.apache.org/licenses/LICENSE-2.0
	dnl
	dnl Unless required by applicable law or agreed to in writing, software
	dnl distributed under the License is distributed on an "AS IS" BASIS,
	dnl WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	dnl See the License for the specific language governing permissions and
	dnl limitations under the License.

	dnl # start of module specific part
	APACHE_MODPATH_INIT(http2)

	dnl # list of module object files
	http2_objs="dnl
	mod_http2.lo dnl
	h2_bucket_beam.lo dnl
	h2_bucket_eos.lo dnl
	h2_c1.lo dnl
	h2_c1_io.lo dnl
	h2_c2.lo dnl
	h2_c2_filter.lo dnl
	h2_config.lo dnl
	h2_conn_ctx.lo dnl
	h2_headers.lo dnl
	h2_mplx.lo dnl
	h2_protocol.lo dnl
	h2_push.lo dnl
	h2_request.lo dnl
	h2_session.lo dnl
	h2_stream.lo dnl
	h2_switch.lo dnl
	h2_util.lo dnl
	h2_workers.lo dnl
	h2_ws.lo dnl
	"

	dnl
	dnl APACHE_CHECK_NGHTTP2
	dnl
	dnl Configure for nghttp2, giving preference to
	dnl "--with-nghttp2=<path>" if it was specified.
	dnl
	AC_DEFUN([APACHE_CHECK_NGHTTP2],[
	AC_CACHE_CHECK([for nghttp2], [ac_cv_nghttp2], [
	dnl initialise the variables we use
	ac_cv_nghttp2=no
	ap_nghttp2_found=""
	ap_nghttp2_base=""
	ap_nghttp2_libs=""

	dnl Determine the nghttp2 base directory, if any
	AC_MSG_CHECKING([for user-provided nghttp2 base directory])
	AC_ARG_WITH(nghttp2, APACHE_HELP_STRING(--with-nghttp2=PATH, nghttp2 installation directory), [
	dnl If --with-nghttp2 specifies a directory, we use that directory
	if test "x$withval" != "xyes" -a "x$withval" != "x"; then
	dnl This ensures $withval is actually a directory and that it is absolute
	ap_nghttp2_base="`cd $withval ; pwd`"
	fi
	])
	if test "x$ap_nghttp2_base" = "x"; then
	AC_MSG_RESULT(none)
	else
	AC_MSG_RESULT($ap_nghttp2_base)
	fi

	dnl Run header and version checks
	saved_CPPFLAGS="$CPPFLAGS"
	saved_LIBS="$LIBS"
	saved_LDFLAGS="$LDFLAGS"

	dnl Before doing anything else, load in pkg-config variables
	if test -n "$PKGCONFIG"; then
	saved_PKG_CONFIG_PATH="$PKG_CONFIG_PATH"
	AC_MSG_CHECKING([for pkg-config along $PKG_CONFIG_PATH])
	if test "x$ap_nghttp2_base" != "x" ; then
	if test -f "${ap_nghttp2_base}/lib/pkgconfig/libnghttp2.pc"; then
	dnl Ensure that the given path is used by pkg-config too, otherwise
	dnl the system libnghttp2.pc might be picked up instead.
	PKG_CONFIG_PATH="${ap_nghttp2_base}/lib/pkgconfig${PKG_CONFIG_PATH+:}${PKG_CONFIG_PATH}"
	export PKG_CONFIG_PATH
	elif test -f "${ap_nghttp2_base}/lib64/pkgconfig/libnghttp2.pc"; then
	dnl Ensure that the given path is used by pkg-config too, otherwise
	dnl the system libnghttp2.pc might be picked up instead.
	PKG_CONFIG_PATH="${ap_nghttp2_base}/lib64/pkgconfig${PKG_CONFIG_PATH+:}${PKG_CONFIG_PATH}"
	export PKG_CONFIG_PATH
	fi
	fi
	AC_ARG_ENABLE(nghttp2-staticlib-deps,APACHE_HELP_STRING(--enable-nghttp2-staticlib-deps,[link mod_http2 with dependencies of libnghttp2's static libraries (as indicated by "pkg-config --static"). Must be specified in addition to --enable-http2.]), [
	if test "$enableval" = "yes"; then
	PKGCONFIG_LIBOPTS="--static"
	fi
	])
	ap_nghttp2_libs="`$PKGCONFIG $PKGCONFIG_LIBOPTS --libs-only-l --silence-errors libnghttp2`"
	if test $? -eq 0; then
	ap_nghttp2_found="yes"
	pkglookup="`$PKGCONFIG --cflags-only-I libnghttp2`"
	APR_ADDTO(CPPFLAGS, [$pkglookup])
	APR_ADDTO(MOD_CFLAGS, [$pkglookup])
	pkglookup="`$PKGCONFIG $PKGCONFIG_LIBOPTS --libs-only-L libnghttp2`"
	APR_ADDTO(LDFLAGS, [$pkglookup])
	APR_ADDTO(MOD_LDFLAGS, [$pkglookup])
	pkglookup="`$PKGCONFIG $PKGCONFIG_LIBOPTS --libs-only-other libnghttp2`"
	APR_ADDTO(LDFLAGS, [$pkglookup])
	APR_ADDTO(MOD_LDFLAGS, [$pkglookup])
	fi
	PKG_CONFIG_PATH="$saved_PKG_CONFIG_PATH"
	fi

	dnl fall back to the user-supplied directory if not found via pkg-config
	if test "x$ap_nghttp2_base" != "x" -a "x$ap_nghttp2_found" = "x"; then
	APR_ADDTO(CPPFLAGS, [-I$ap_nghttp2_base/include])
	APR_ADDTO(MOD_CFLAGS, [-I$ap_nghttp2_base/include])
	APR_ADDTO(LDFLAGS, [-L$ap_nghttp2_base/lib])
	APR_ADDTO(MOD_LDFLAGS, [-L$ap_nghttp2_base/lib])
	if test "x$ap_platform_runtime_link_flag" != "x"; then
	APR_ADDTO(LDFLAGS, [$ap_platform_runtime_link_flag$ap_nghttp2_base/lib])
	APR_ADDTO(MOD_LDFLAGS, [$ap_platform_runtime_link_flag$ap_nghttp2_base/lib])
	fi
	fi

	AC_MSG_CHECKING([for nghttp2 version >= 1.2.1])
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <nghttp2/nghttp2ver.h>]],[[
	#if !defined(NGHTTP2_VERSION_NUM)
	#error "Missing nghttp2 version"
	#endif
	#if NGHTTP2_VERSION_NUM < 0x010201
	#error "Unsupported nghttp2 version " NGHTTP2_VERSION_TEXT
	#endif]])],
	[AC_MSG_RESULT(OK)
	ac_cv_nghttp2=yes],
	[AC_MSG_RESULT(FAILED)])

	if test "x$ac_cv_nghttp2" = "xyes"; then
	ap_nghttp2_libs="${ap_nghttp2_libs:--lnghttp2} `$apr_config --libs`"
	APR_ADDTO(MOD_LDFLAGS, [$ap_nghttp2_libs])
	APR_ADDTO(LIBS, [$ap_nghttp2_libs])

	dnl Run library and function checks
	liberrors=""
	AC_CHECK_HEADERS([nghttp2/nghttp2.h])
	AC_CHECK_FUNCS([nghttp2_session_server_new2], [], [liberrors="yes"])
	if test "x$liberrors" != "x"; then
	AC_MSG_WARN([nghttp2 library is unusable])
	fi
	dnl # nghttp2 >= 1.3.0: access to stream weights
	AC_CHECK_FUNCS([nghttp2_stream_get_weight], [], [liberrors="yes"])
	if test "x$liberrors" != "x"; then
	AC_MSG_WARN([nghttp2 version >= 1.3.0 is required])
	fi
	dnl # nghttp2 >= 1.5.0: changing stream priorities
	AC_CHECK_FUNCS([nghttp2_session_change_stream_priority],
	[APR_ADDTO(MOD_CPPFLAGS, ["-DH2_NG2_CHANGE_PRIO"])], [])
	dnl # nghttp2 >= 1.14.0: invalid header callback
	AC_CHECK_FUNCS([nghttp2_session_callbacks_set_on_invalid_header_callback],
	[APR_ADDTO(MOD_CPPFLAGS, ["-DH2_NG2_INVALID_HEADER_CB"])], [])
	dnl # nghttp2 >= 1.15.0: get/set stream window sizes
	AC_CHECK_FUNCS([nghttp2_session_get_stream_local_window_size],
	[APR_ADDTO(MOD_CPPFLAGS, ["-DH2_NG2_LOCAL_WIN_SIZE"])], [])
	dnl # nghttp2 >= 1.15.0: don't keep info on closed streams
	AC_CHECK_FUNCS([nghttp2_option_set_no_closed_streams],
	[APR_ADDTO(MOD_CPPFLAGS, ["-DH2_NG2_NO_CLOSED_STREAMS"])], [])
	dnl # nghttp2 >= 1.50.0: rfc9113 leading/trailing whitespec strictness
	AC_CHECK_FUNCS([nghttp2_option_set_no_rfc9113_leading_and_trailing_ws_validation],
	[APR_ADDTO(MOD_CPPFLAGS, ["-DH2_NG2_RFC9113_STRICTNESS"])], [])
	else
	AC_MSG_WARN([nghttp2 version is too old])
	fi

	dnl restore
	CPPFLAGS="$saved_CPPFLAGS"
	LIBS="$saved_LIBS"
	LDFLAGS="$saved_LDFLAGS"
	])
	if test "x$ac_cv_nghttp2" = "xyes"; then
	AC_DEFINE(HAVE_NGHTTP2, 1, [Define if nghttp2 is available])
	fi
	])


	dnl # hook module into the Autoconf mechanism (--enable-http2)
	APACHE_MODULE(http2, [HTTP/2 protocol handling in addition to HTTP protocol
	handling. Implemented by mod_http2. This module requires a libnghttp2 installation.
	See --with-nghttp2 on how to manage non-standard locations. This module
	is usually linked shared and requires loading. ], $http2_objs, , most, [
	APACHE_CHECK_OPENSSL
	if test "$ac_cv_openssl" = "yes" ; then
	APR_ADDTO(MOD_CPPFLAGS, ["-DH2_OPENSSL"])
	fi

	APACHE_CHECK_NGHTTP2
	if test "$ac_cv_nghttp2" = "yes" ; then
	if test "x$enable_http2" = "xshared"; then
	# The only symbol which needs to be exported is the module
	# structure, so ask libtool to hide everything else:
	APR_ADDTO(MOD_HTTP2_LDADD, [-export-symbols-regex http2_module])
	fi
	else
	enable_http2=no
	fi
	])

	# Ensure that other modules can pick up mod_http2.h
	# icing: hold back for now until it is more stable
	#APR_ADDTO(INCLUDES, [-I\$(top_srcdir)/$modpath_current])



	dnl # list of module object files
	proxy_http2_objs="dnl
	mod_proxy_http2.lo dnl
	h2_proxy_session.lo dnl
	h2_proxy_util.lo dnl
	"

	dnl # hook module into the Autoconf mechanism (--enable-proxy_http2)
	APACHE_MODULE(proxy_http2, [HTTP/2 proxy module. This module requires a libnghttp2 installation.
	See --with-nghttp2 on how to manage non-standard locations. Also requires --enable-proxy.], $proxy_http2_objs, , no, [
	APACHE_CHECK_NGHTTP2
	if test "$ac_cv_nghttp2" = "yes" ; then
	if test "x$enable_http2" = "xshared"; then
	# The only symbol which needs to be exported is the module
	# structure, so ask libtool to hide everything else:
	APR_ADDTO(MOD_PROXY_HTTP2_LDADD, [-export-symbols-regex proxy_http2_module])
	fi
	else
	enable_proxy_http2=no
	fi
	], proxy)


	dnl # end of module specific part
	APACHE_MODPATH_FINISH