weave/build/autoconf/m4/nl_with_lwip.m4 - nest-cam/4320010/weave - Git at Google

 #
 #    Copyright (c) 2015-2017 Nest Labs, Inc.
 #    All rights reserved.
 #
 #    Licensed under the Apache License, Version 2.0 (the "License");
 #    you may not use this file except in compliance with the License.
 #    You may obtain a copy of the License at
 #
 #        http://www.apache.org/licenses/LICENSE-2.0
 #
 #    Unless required by applicable law or agreed to in writing, software
 #    distributed under the License is distributed on an "AS IS" BASIS,
 #    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #    See the License for the specific language governing permissions and
 #    limitations under the License.
 #

 #
 #    Description:
 #      This file defines a GNU autoconf M4-style macro for the presence
 #      of the LwIP package.
 #

 #
 # NL_WITH_LWIP
 #
 # ----------------------------------------------------------------------------
 AC_DEFUN([NL_WITH_LWIP],
 [
     # Influential external variables for the package support

     AC_ARG_VAR(LWIP_CPPFLAGS, [LwIP C preprocessor flags])
     AC_ARG_VAR(LWIP_LDFLAGS,  [LwIP linker flags])
     AC_ARG_VAR(LWIP_LIBS,     [LwIP linker libraries])

     # Allow the user to specify both external headers and libraries
     # together (or internal).

     AC_ARG_WITH(lwip,
 	AS_HELP_STRING([--with-lwip=DIR],
 		   [Specify location of the LwIP headers and libraries @<:@default=internal@:>@.]),
 	[
 	    if test "${withval}" = "no"; then
 		AC_MSG_ERROR([${PACKAGE_NAME} requires the LwIP package])
 	    elif test "${withval}" = "internal"; then
 		lwip_dir=${withval}
 		nl_with_lwip=${withval}
 	    else
 		lwip_dir=${withval}
 		nl_with_lwip=external
 	    fi
 	],
 	[lwip_dir=; nl_with_lwip=internal])

     # Allow users to specify external headers and libraries independently.

     AC_ARG_WITH(lwip-includes,
 	AS_HELP_STRING([--with-lwip-includes=DIR],
 		   [Specify location of LwIP headers @<:@default=internal@:>@.]),
 	[
 	    if test "${withval}" = "no"; then
 		AC_MSG_ERROR([${PACKAGE_NAME} requires the LwIP package])
 	    fi

 	    if test "x${lwip_dir}" != "x"; then
 		AC_MSG_WARN([overriding --with-lwip=${lwip_dir}])
 	    fi

 	    if test "${withval}" = "internal"; then
 		lwip_header_dir=${withval}
 		nl_with_lwip=${withval}
 	    else
 		lwip_header_dir=${withval}
 		nl_with_lwip=external
 	    fi
 	],
 	[
 	    lwip_header_dir=;
 	    if test "x${nl_with_lwip}" = "x"; then
 		nl_with_lwip=internal
 	    fi
 	])

     AC_ARG_WITH(lwip-libs,
 	AS_HELP_STRING([--with-lwip-libs=DIR],
 		   [Specify location of LwIP libraries @<:@default=internal@:>@.]),
 	[
 	    if test "${withval}" = "no"; then
 		AC_MSG_ERROR([${PACKAGE_NAME} requires the LwIP package])
 	    fi

 	    if test "x${lwip_dir}" != "x"; then
 		AC_MSG_WARN([overriding --with-lwip=${lwip_dir}])
 	    fi

 	    if test "${withval}" = "internal"; then
 		lwip_library_dir=${withval}
 		nl_with_lwip=${withval}
 	    else
 		lwip_library_dir=${withval}
 		nl_with_lwip=external
 	    fi
 	],
 	[
 	    lwip_library_dir=;
 	    if test "x${nl_with_lwip}" = "x"; then
 		nl_with_lwip=internal
 	    fi
 	])

     AC_MSG_CHECKING([source of the LwIP package])
     AC_MSG_RESULT([${nl_with_lwip}])

     # If the user has selected or has defaulted into the internal LwIP
     # package, set the values appropriately. Otherwise, run through the
     # usual routine.

     if test "${nl_with_lwip}" = "internal"; then
 	# LwIP also requires arch/{cc,perf,sys_arch}.h. For an
 	# external LwIP, the user is expected to pass in CPP/CFLAGS
 	# that point to these. However, for the internal LwIP package,
 	# we need to explicitly point at our definition for these.

 	LWIP_CPPFLAGS="-I${ac_abs_confdir}/third_party/lwip/repo/lwip/src/include -I${ac_abs_confdir}/third_party/lwip/repo/lwip/src/include/ipv4 -I${ac_abs_confdir}/third_party/lwip/repo/lwip/src/include/ipv6 -I${ac_abs_confdir}/src/lwip"
 	LWIP_LDFLAGS="-L${ac_pwd}/src/lwip"
 	LWIP_LIBS="-llwip -lpthread"

     # On Darwin, "common" symbols are not added to the table of contents
     # by ranlib and so can cause link time errors. This option
     # offers a workaround.
     case "${target_os}" in
         *darwin*)
             LWIP_CPPFLAGS="${LWIP_CPPFLAGS} -fno-common"
             ;;
     esac

     else
 	# We always prefer checking the values of the various '--with-lwip-...'
 	# options first to using pkg-config because the former might be used
 	# in a cross-compilation environment on a system that also contains
 	# pkg-config. In such a case, the user wants what he/she specified
 	# rather than what pkg-config indicates.

 	if test "x${lwip_dir}" != "x" -o "x${lwip_header_dir}" != "x" -o "x${lwip_library_dir}" != "x"; then
 	    if test "x${lwip_dir}" != "x"; then
 		if test -d "${lwip_dir}"; then
 		    if test -d "${lwip_dir}/include"; then
 			LWIP_CPPFLAGS="-I${lwip_dir}/include -I${lwip_dir}/include/ipv4 -I${lwip_dir}/include/ipv6"
 		    else
 			LWIP_CPPFLAGS="-I${lwip_dir} -I${lwip_dir}/ipv4 -I${lwip_dir}/ipv6"
 		    fi

 		    if test -d "${lwip_dir}/lib"; then
 			LWIP_LDFLAGS="-L${lwip_dir}/lib"
 		    else
 			LWIP_LDFLAGS="-L${lwip_dir}"
 		    fi
 		else
 		    AC_MSG_ERROR([No such directory ${lwip_dir}])
 		fi
 	    fi

 	    if test "x${lwip_header_dir}" != "x"; then
 		if test -d "${lwip_header_dir}"; then
 		    LWIP_CPPFLAGS="-I${lwip_header_dir} -I${lwip_header_dir}/ipv4 -I${lwip_header_dir}/ipv6"
 		else
 		    AC_MSG_ERROR([No such directory ${lwip_header_dir}])
 		fi
 	    fi

 	    if test "x${lwip_library_dir}" != "x"; then
 		if test -d "${lwip_library_dir}"; then
 		    LWIP_LDFLAGS="-L${lwip_library_dir}"
 		else
 		    AC_MSG_ERROR([No such directory ${lwip_library_dir}])
 		fi
 	    fi

 	    LWIP_LIBS="${LWIP_LDFLAGS} -llwip"

 	elif test "x${PKG_CONFIG}" != "x" -a "${PKG_CONFIG} --exists lwip"; then
 	    LWIP_CPPFLAGS="`${PKG_CONFIG} --cflags lwip`"
 	    LWIP_LDFLAGS="`${PKG_CONFIG} --libs-only-L lwip`"
 	    LWIP_LIBS="`${PKG_CONFIG} --libs-only-l lwip`"

 	else
 	    AC_MSG_ERROR([Cannot find the LwIP package.])
 	fi
     fi

     AC_SUBST(LWIP_CPPFLAGS)
     AC_SUBST(LWIP_LDFLAGS)
     AC_SUBST(LWIP_LIBS)

     nl_saved_CPPFLAGS="${CPPFLAGS}"
     nl_saved_LDFLAGS="${LDFLAGS}"
     nl_saved_LIBS="${LIBS}"

     CPPFLAGS="${CPPFLAGS} ${LWIP_CPPFLAGS}"
     LDFLAGS="${LDFLAGS} ${LWIP_LDFLAGS}"
     LIBS="${LIBS} ${LWIP_LIBS}"

     # LwIP does a miserable job of making its headers work
     # standalone. Check the two below, standalone, then check the
     # rest.

     AC_CHECK_HEADERS([lwip/debug.h] [lwip/err.h],
     [],
     [
         AC_MSG_ERROR(The LwIP header "$ac_header" is required but cannot be found.)
     ])

     AC_CHECK_HEADERS([lwip/dns.h] [lwip/ethip6.h] [lwip/init.h] [lwip/ip_addr.h] [lwip/ip.h] [lwip/mem.h] [lwip/netif.h] [lwip/opt.h] [lwip/pbuf.h] [lwip/raw.h] [lwip/snmp.h] [lwip/stats.h] [lwip/sys.h] [lwip/tcp.h] [lwip/tcpip.h] [lwip/udp.h],
     [],
     [
         AC_MSG_ERROR(The LwIP header "$ac_header" is required but cannot be found.)
     ],
     [#include <lwip/err.h>
      #include <lwip/ip4_addr.h>])

     CPPFLAGS="${nl_saved_CPPFLAGS}"
     LDFLAGS="${nl_saved_LDFLAGS}"
     LIBS="${nl_saved_LIBS}"
 ])
	#
	# Copyright (c) 2015-2017 Nest Labs, Inc.
	# All rights reserved.
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.
	#

	#
	# Description:
	# This file defines a GNU autoconf M4-style macro for the presence
	# of the LwIP package.
	#

	#
	# NL_WITH_LWIP
	#
	# ----------------------------------------------------------------------------
	AC_DEFUN([NL_WITH_LWIP],
	[
	# Influential external variables for the package support

	AC_ARG_VAR(LWIP_CPPFLAGS, [LwIP C preprocessor flags])
	AC_ARG_VAR(LWIP_LDFLAGS, [LwIP linker flags])
	AC_ARG_VAR(LWIP_LIBS, [LwIP linker libraries])

	# Allow the user to specify both external headers and libraries
	# together (or internal).

	AC_ARG_WITH(lwip,
	AS_HELP_STRING([--with-lwip=DIR],
	[Specify location of the LwIP headers and libraries @<:@default=internal@:>@.]),
	[
	if test "${withval}" = "no"; then
	AC_MSG_ERROR([${PACKAGE_NAME} requires the LwIP package])
	elif test "${withval}" = "internal"; then
	lwip_dir=${withval}
	nl_with_lwip=${withval}
	else
	lwip_dir=${withval}
	nl_with_lwip=external
	fi
	],
	[lwip_dir=; nl_with_lwip=internal])

	# Allow users to specify external headers and libraries independently.

	AC_ARG_WITH(lwip-includes,
	AS_HELP_STRING([--with-lwip-includes=DIR],
	[Specify location of LwIP headers @<:@default=internal@:>@.]),
	[
	if test "${withval}" = "no"; then
	AC_MSG_ERROR([${PACKAGE_NAME} requires the LwIP package])
	fi

	if test "x${lwip_dir}" != "x"; then
	AC_MSG_WARN([overriding --with-lwip=${lwip_dir}])
	fi

	if test "${withval}" = "internal"; then
	lwip_header_dir=${withval}
	nl_with_lwip=${withval}
	else
	lwip_header_dir=${withval}
	nl_with_lwip=external
	fi
	],
	[
	lwip_header_dir=;
	if test "x${nl_with_lwip}" = "x"; then
	nl_with_lwip=internal
	fi
	])

	AC_ARG_WITH(lwip-libs,
	AS_HELP_STRING([--with-lwip-libs=DIR],
	[Specify location of LwIP libraries @<:@default=internal@:>@.]),
	[
	if test "${withval}" = "no"; then
	AC_MSG_ERROR([${PACKAGE_NAME} requires the LwIP package])
	fi

	if test "x${lwip_dir}" != "x"; then
	AC_MSG_WARN([overriding --with-lwip=${lwip_dir}])
	fi

	if test "${withval}" = "internal"; then
	lwip_library_dir=${withval}
	nl_with_lwip=${withval}
	else
	lwip_library_dir=${withval}
	nl_with_lwip=external
	fi
	],
	[
	lwip_library_dir=;
	if test "x${nl_with_lwip}" = "x"; then
	nl_with_lwip=internal
	fi
	])

	AC_MSG_CHECKING([source of the LwIP package])
	AC_MSG_RESULT([${nl_with_lwip}])

	# If the user has selected or has defaulted into the internal LwIP
	# package, set the values appropriately. Otherwise, run through the
	# usual routine.

	if test "${nl_with_lwip}" = "internal"; then
	# LwIP also requires arch/{cc,perf,sys_arch}.h. For an
	# external LwIP, the user is expected to pass in CPP/CFLAGS
	# that point to these. However, for the internal LwIP package,
	# we need to explicitly point at our definition for these.

	LWIP_CPPFLAGS="-I${ac_abs_confdir}/third_party/lwip/repo/lwip/src/include -I${ac_abs_confdir}/third_party/lwip/repo/lwip/src/include/ipv4 -I${ac_abs_confdir}/third_party/lwip/repo/lwip/src/include/ipv6 -I${ac_abs_confdir}/src/lwip"
	LWIP_LDFLAGS="-L${ac_pwd}/src/lwip"
	LWIP_LIBS="-llwip -lpthread"

	# On Darwin, "common" symbols are not added to the table of contents
	# by ranlib and so can cause link time errors. This option
	# offers a workaround.
	case "${target_os}" in
	darwin)
	LWIP_CPPFLAGS="${LWIP_CPPFLAGS} -fno-common"
	;;
	esac

	else
	# We always prefer checking the values of the various '--with-lwip-...'
	# options first to using pkg-config because the former might be used
	# in a cross-compilation environment on a system that also contains
	# pkg-config. In such a case, the user wants what he/she specified
	# rather than what pkg-config indicates.

	if test "x${lwip_dir}" != "x" -o "x${lwip_header_dir}" != "x" -o "x${lwip_library_dir}" != "x"; then
	if test "x${lwip_dir}" != "x"; then
	if test -d "${lwip_dir}"; then
	if test -d "${lwip_dir}/include"; then
	LWIP_CPPFLAGS="-I${lwip_dir}/include -I${lwip_dir}/include/ipv4 -I${lwip_dir}/include/ipv6"
	else
	LWIP_CPPFLAGS="-I${lwip_dir} -I${lwip_dir}/ipv4 -I${lwip_dir}/ipv6"
	fi

	if test -d "${lwip_dir}/lib"; then
	LWIP_LDFLAGS="-L${lwip_dir}/lib"
	else
	LWIP_LDFLAGS="-L${lwip_dir}"
	fi
	else
	AC_MSG_ERROR([No such directory ${lwip_dir}])
	fi
	fi

	if test "x${lwip_header_dir}" != "x"; then
	if test -d "${lwip_header_dir}"; then
	LWIP_CPPFLAGS="-I${lwip_header_dir} -I${lwip_header_dir}/ipv4 -I${lwip_header_dir}/ipv6"
	else
	AC_MSG_ERROR([No such directory ${lwip_header_dir}])
	fi
	fi

	if test "x${lwip_library_dir}" != "x"; then
	if test -d "${lwip_library_dir}"; then
	LWIP_LDFLAGS="-L${lwip_library_dir}"
	else
	AC_MSG_ERROR([No such directory ${lwip_library_dir}])
	fi
	fi

	LWIP_LIBS="${LWIP_LDFLAGS} -llwip"

	elif test "x${PKG_CONFIG}" != "x" -a "${PKG_CONFIG} --exists lwip"; then
	LWIP_CPPFLAGS="`${PKG_CONFIG} --cflags lwip`"
	LWIP_LDFLAGS="`${PKG_CONFIG} --libs-only-L lwip`"
	LWIP_LIBS="`${PKG_CONFIG} --libs-only-l lwip`"

	else
	AC_MSG_ERROR([Cannot find the LwIP package.])
	fi
	fi

	AC_SUBST(LWIP_CPPFLAGS)
	AC_SUBST(LWIP_LDFLAGS)
	AC_SUBST(LWIP_LIBS)

	nl_saved_CPPFLAGS="${CPPFLAGS}"
	nl_saved_LDFLAGS="${LDFLAGS}"
	nl_saved_LIBS="${LIBS}"

	CPPFLAGS="${CPPFLAGS} ${LWIP_CPPFLAGS}"
	LDFLAGS="${LDFLAGS} ${LWIP_LDFLAGS}"
	LIBS="${LIBS} ${LWIP_LIBS}"

	# LwIP does a miserable job of making its headers work
	# standalone. Check the two below, standalone, then check the
	# rest.

	AC_CHECK_HEADERS([lwip/debug.h] [lwip/err.h],
	[],
	[
	AC_MSG_ERROR(The LwIP header "$ac_header" is required but cannot be found.)
	])

	AC_CHECK_HEADERS([lwip/dns.h] [lwip/ethip6.h] [lwip/init.h] [lwip/ip_addr.h] [lwip/ip.h] [lwip/mem.h] [lwip/netif.h] [lwip/opt.h] [lwip/pbuf.h] [lwip/raw.h] [lwip/snmp.h] [lwip/stats.h] [lwip/sys.h] [lwip/tcp.h] [lwip/tcpip.h] [lwip/udp.h],
	[],
	[
	AC_MSG_ERROR(The LwIP header "$ac_header" is required but cannot be found.)
	],
	[#include <lwip/err.h>
	#include <lwip/ip4_addr.h>])

	CPPFLAGS="${nl_saved_CPPFLAGS}"
	LDFLAGS="${nl_saved_LDFLAGS}"
	LIBS="${nl_saved_LIBS}"
	])