modules/http2/config.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_alt_svc.lo dnl
 h2_bucket_eoc.lo dnl
 h2_bucket_eos.lo dnl
 h2_config.lo dnl
 h2_conn.lo dnl
 h2_conn_io.lo dnl
 h2_ctx.lo dnl
 h2_from_h1.lo dnl
 h2_h2.lo dnl
 h2_io.lo dnl
 h2_io_set.lo dnl
 h2_mplx.lo dnl
 h2_push.lo dnl
 h2_request.lo dnl
 h2_response.lo dnl
 h2_session.lo dnl
 h2_stream.lo dnl
 h2_stream_set.lo dnl
 h2_switch.lo dnl
 h2_task.lo dnl
 h2_task_input.lo dnl
 h2_task_output.lo dnl
 h2_task_queue.lo dnl
 h2_util.lo dnl
 h2_worker.lo dnl
 h2_workers.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" -a \
               -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
       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])
         APR_ADDTO(ab_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(ab_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 >= 1.0.0])
     AC_TRY_COMPILE([#include <nghttp2/nghttp2ver.h>],[
 #if !defined(NGHTTP2_VERSION_NUM)
 #error "Missing nghttp2 version"
 #endif
 #if NGHTTP2_VERSION_NUM < 0x010000
 #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, [$ap_nghttp2_libs])
       APR_SETVAR(ab_LDFLAGS, [$MOD_LDFLAGS])
       APACHE_SUBST(ab_CFLAGS)
       APACHE_SUBST(ab_LDFLAGS)

       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
       AC_CHECK_FUNCS([nghttp2_session_change_stream_priority],
         [APR_ADDTO(MOD_CPPFLAGS, ["-DH2_NG2_CHANGE_PRIO"])], [])
     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. ], $http2_objs, , most, [
     APACHE_CHECK_NGHTTP2
     if test "$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
 ])

 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_alt_svc.lo dnl
	h2_bucket_eoc.lo dnl
	h2_bucket_eos.lo dnl
	h2_config.lo dnl
	h2_conn.lo dnl
	h2_conn_io.lo dnl
	h2_ctx.lo dnl
	h2_from_h1.lo dnl
	h2_h2.lo dnl
	h2_io.lo dnl
	h2_io_set.lo dnl
	h2_mplx.lo dnl
	h2_push.lo dnl
	h2_request.lo dnl
	h2_response.lo dnl
	h2_session.lo dnl
	h2_stream.lo dnl
	h2_stream_set.lo dnl
	h2_switch.lo dnl
	h2_task.lo dnl
	h2_task_input.lo dnl
	h2_task_output.lo dnl
	h2_task_queue.lo dnl
	h2_util.lo dnl
	h2_worker.lo dnl
	h2_workers.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" -a \
	-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
	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])
	APR_ADDTO(ab_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(ab_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 >= 1.0.0])
	AC_TRY_COMPILE([#include <nghttp2/nghttp2ver.h>],[
	#if !defined(NGHTTP2_VERSION_NUM)
	#error "Missing nghttp2 version"
	#endif
	#if NGHTTP2_VERSION_NUM < 0x010000
	#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, [$ap_nghttp2_libs])
	APR_SETVAR(ab_LDFLAGS, [$MOD_LDFLAGS])
	APACHE_SUBST(ab_CFLAGS)
	APACHE_SUBST(ab_LDFLAGS)

	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
	AC_CHECK_FUNCS([nghttp2_session_change_stream_priority],
	[APR_ADDTO(MOD_CPPFLAGS, ["-DH2_NG2_CHANGE_PRIO"])], [])
	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. ], $http2_objs, , most, [
	APACHE_CHECK_NGHTTP2
	if test "$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
	])

	dnl # end of module specific part
	APACHE_MODPATH_FINISH