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configure.ac
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	dnl require autoconf 2.60 (AS_ECHO/AS_ECHO_N)
	AC_PREREQ([2.60])
	define(_CLIENT_VERSION_MAJOR, 0)
	define(_CLIENT_VERSION_MINOR, 8)
	define(_CLIENT_VERSION_REVISION, 99)
	define(_CLIENT_VERSION_BUILD, 0)
	define(_CLIENT_VERSION_IS_RELEASE, false)
	define(_COPYRIGHT_YEAR, 2013)
	AC_INIT([Bitcoin],[_CLIENT_VERSION_MAJOR._CLIENT_VERSION_MINOR._CLIENT_VERSION_REVISION],[info@bitcoin.org],[bitcoin])
	AC_CONFIG_AUX_DIR([src/build-aux])
	AC_CONFIG_MACRO_DIR([src/m4])
	AC_CANONICAL_HOST
	AH_TOP([#ifndef BITCOIN_CONFIG_H])
	AH_TOP([#define BITCOIN_CONFIG_H])
	AH_BOTTOM([#endif //BITCOIN_CONFIG_H])

	# This m4 will only be used if a system copy cannot be found. This is helpful
	# on systems where autotools are installed but the pkg-config macros are not in
	# a default location. It is currently used for building on OSX where autotools
	# are preinstalled but pkg-config comes from macports or homebrew. It should
	# probably be removed when building on <= 10.6 is no longer supported.
	m4_include([pkg.m4])

	dnl faketime breaks configure and is only needed for make. Disable it here.
	unset FAKETIME

	dnl ==============================================================
	dnl Setup for automake
	dnl ==============================================================

	AM_INIT_AUTOMAKE([no-define subdir-objects foreign])

	dnl faketime messes with timestamps and causes configure to be re-run.
	dnl --disable-maintainer-mode can be used to bypass this.
	AM_MAINTAINER_MODE([enable])

	dnl make the compilation flags quiet unless V=1 is used
	m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

	AC_ARG_WITH([miniupnpc],
	[AS_HELP_STRING([--with-miniupnpc],
	[enable UPNP (default is yes if libminiupnpc is found)])],
	[use_upnp=$withval],
	[use_upnp=auto])

	AC_ARG_ENABLE([upnp-default],
	[AS_HELP_STRING([--enable-upnp-default],
	[if UPNP is enabled, turn it on at startup (default is no)])],
	[use_upnp_default=$enableval],
	[use_upnp_default=no])

	dnl enable ipv6 support
	AC_ARG_ENABLE([ipv6],
	[AS_HELP_STRING([--enable-ipv6],
	[enable ipv6 (default is yes)])],
	[use_ipv6=$enableval],
	[use_ipv6=yes])

	dnl enable qt support
	AC_ARG_WITH([qt],
	[AS_HELP_STRING([--with-qt],
	[enable qt (default is yes)])],
	[use_qt=$withval],
	[use_qt=yes])

	AC_ARG_ENABLE(tests,
	AS_HELP_STRING([--enable-tests],[compile tests (default is yes)]),
	[use_tests=$enableval],
	[use_tests=yes])

	AC_ARG_WITH([comparison-tool],
	AS_HELP_STRING([with-comparison-tool],[path to java comparison tool (requires --enable-tests)]),
	[use_comparison_tool=$withval],
	[use_comparison_tool=no])

	AC_ARG_WITH([qrencode],
	[AS_HELP_STRING([--with-qrencode],
	[enable QR code support (default is yes if qt is enabled and libqrencode is found)])],
	[use_qr=$withval],
	[use_qr=auto])

	AC_ARG_WITH([qtdbus],
	[AS_HELP_STRING([--with-qtdbus],
	[enable DBus support (default is yes if qt is enabled and QtDBus is found)])],
	[use_dbus=$withval],
	[use_dbus=auto])

	AC_ARG_ENABLE([hardening],
	[AS_HELP_STRING([--enable-hardening],
	[attempt to harden the resulting executables (default is yes)])],
	[use_hardening=$enableval],
	[use_hardening=yes])

	AC_ARG_ENABLE([ccache],
	[AS_HELP_STRING([--enable-ccache],
	[enable building with ccache (default is yes if ccache is found)])],
	[use_ccache=$enableval],
	[use_ccache=auto])

	AC_ARG_ENABLE([lcov],
	[AS_HELP_STRING([--enable-lcov],
	[enable lcov testing (default is no)])],
	[use_lcov=yes],
	[use_lcov=no])

	AC_ARG_WITH([qt-incdir],[AS_HELP_STRING([--with-qt-incdir=INC_DIR],[specify qt include path (overridden by pkgconfig)])], [qt_include_path=$withval], [])
	AC_ARG_WITH([qt-libdir],[AS_HELP_STRING([--with-qt-libdir=LIB_DIR],[specify qt lib path (overridden by pkgconfig)])], [qt_lib_path=$withval], [])
	AC_ARG_WITH([qt-bindir],[AS_HELP_STRING([--with-qt-bindir=BIN_DIR],[specify qt bin path])], [qt_bin_path=$withval], [])
	AC_ARG_WITH([qt-plugindir],[AS_HELP_STRING([--with-qt-plugindir=PLUGIN_DIR],[specify qt plugin path (overridden by pkgconfig)])], [qt_plugin_path=$withval], [])
	AC_ARG_WITH([protoc-bindir],[AS_HELP_STRING([--with-protoc-bindir=BIN_DIR],[specify protoc bin path])], [protoc_bin_path=$withval], [])


	AC_CONFIG_SRCDIR([src])
	AC_CONFIG_HEADERS([src/bitcoin-config.h])

	dnl Checks for programs.
	AC_PROG_CXX
	AC_PROG_CC
	AC_PROG_CPP
	AC_PROG_CXXCPP
	AC_PROG_INSTALL
	AC_PROG_OBJC
	m4_ifdef([AC_PROG_OBJCXX],[AC_PROG_OBJCXX])
	AC_PROG_MKDIR_P
	AC_PROG_SED
	AC_PATH_TOOL(AR, ar)
	AC_PATH_TOOL(RANLIB, ranlib)
	AC_PATH_TOOL(STRIP, strip)
	AC_PATH_TOOL(GCOV, gcov)
	AC_PATH_PROG(LCOV, lcov)
	AC_PATH_PROG(JAVA, java)
	AC_PATH_PROG(GENHTML, genhtml)
	AC_PATH_PROG([GIT], [git])
	AC_PATH_PROGS([MOC], [moc-qt4 moc4 moc],, $qt_bin_path:$PATH)
	AC_PATH_PROGS([UIC], [uic-qt4 uic4 uic],, $qt_bin_path:$PATH)
	AC_PATH_PROGS([RCC], [rcc-qt4 rcc4 rcc],, $qt_bin_path:$PATH)
	AC_PATH_PROGS([LRELEASE], [lrelease-qt4 lrelease4 lrelease],, $qt_bin_path:$PATH)
	AC_PATH_PROGS([LUPDATE], [lupdate-qt4 lupdate4 lupdate],, $qt_bin_path:$PATH)
	AC_PATH_PROG([PROTOC], [protoc],, $protoc_bin_path:$PATH)
	AC_PATH_PROG(CCACHE,ccache)
	AC_PATH_PROG(XGETTEXT,xgettext)
	AC_PATH_PROG(HEXDUMP,hexdump)
	PKG_PROG_PKG_CONFIG

	## TODO: Remove these hard-coded paths and flags. They are here for the sake of
	## compatibility with the legacy buildsystem.
	##
	CXXFLAGS="$CXXFLAGS -Wall -Wextra -Wformat -Wformat-security -Wno-unused-parameter"
	CPPFLAGS="$CPPFLAGS -DBOOST_SPIRIT_THREADSAFE -DHAVE_BUILD_INFO"

	AC_LANG_PUSH([C++])

	use_pkgconfig=yes
	case $host in
	mingw)

	#pkgconfig does more harm than good with mingw
	use_pkgconfig=no

	TARGET_OS=windows
	AC_CHECK_LIB([mingwthrd], [main],, AC_MSG_ERROR(lib missing))
	AC_CHECK_LIB([kernel32], [main],, AC_MSG_ERROR(lib missing))
	AC_CHECK_LIB([user32], [main],, AC_MSG_ERROR(lib missing))
	AC_CHECK_LIB([gdi32], [main],, AC_MSG_ERROR(lib missing))
	AC_CHECK_LIB([comdlg32], [main],, AC_MSG_ERROR(lib missing))
	AC_CHECK_LIB([winspool], [main],, AC_MSG_ERROR(lib missing))
	AC_CHECK_LIB([winmm], [main],, AC_MSG_ERROR(lib missing))
	AC_CHECK_LIB([shell32], [main],, AC_MSG_ERROR(lib missing))
	AC_CHECK_LIB([comctl32], [main],, AC_MSG_ERROR(lib missing))
	AC_CHECK_LIB([ole32], [main],, AC_MSG_ERROR(lib missing))
	AC_CHECK_LIB([oleaut32], [main],, AC_MSG_ERROR(lib missing))
	AC_CHECK_LIB([uuid], [main],, AC_MSG_ERROR(lib missing))
	AC_CHECK_LIB([rpcrt4], [main],, AC_MSG_ERROR(lib missing))
	AC_CHECK_LIB([advapi32], [main],, AC_MSG_ERROR(lib missing))
	AC_CHECK_LIB([ws2_32], [main],, AC_MSG_ERROR(lib missing))
	AC_CHECK_LIB([mswsock], [main],, AC_MSG_ERROR(lib missing))
	AC_CHECK_LIB([shlwapi], [main],, AC_MSG_ERROR(lib missing))
	AC_CHECK_LIB([iphlpapi], [main],, AC_MSG_ERROR(lib missing))

	AC_PATH_PROG([MAKENSIS], [makensis], none)
	if test x$MAKENSIS = xnone; then
	AC_MSG_WARN("makensis not found. Cannot create installer.")
	fi

	AC_PATH_TOOL(WINDRES, windres, none)
	if test x$WINDRES = xnone; then
	AC_MSG_ERROR("windres not found")
	fi

	CPPFLAGS="$CPPFLAGS -D_MT -DWIN32 -D_WINDOWS -DBOOST_THREAD_USE_LIB"
	LEVELDB_TARGET_FLAGS="TARGET_OS=OS_WINDOWS_CROSSCOMPILE"
	CXXFLAGS="$CXXFLAGS -w"
	;;
	darwin)
	TARGET_OS=darwin
	LEVELDB_TARGET_FLAGS="TARGET_OS=Darwin"
	if test x$cross_compiling != xyes; then
	AC_CHECK_PROG([PORT],port, port)
	if test x$PORT = xport; then
	dnl add default macports paths
	CPPFLAGS="$CPPFLAGS -I/opt/local/include -I/opt/local/include/db48"
	LIBS="$LIBS -L/opt/local/lib -L/opt/local/lib/db48"
	fi

	AC_CHECK_PROG([BREW],brew, brew)
	if test x$BREW = xbrew; then
	dnl add default homebrew paths
	openssl_prefix=`$BREW --prefix openssl`
	bdb_prefix=`$BREW --prefix berkeley-db4`
	export PKG_CONFIG_PATH="$openssl_prefix/lib/pkgconfig:$PKG_CONFIG_PATH"
	CPPFLAGS="$CPPFLAGS -I$bdb_prefix/include"
	LIBS="$LIBS -L/$bdb_prefix/lib"
	fi
	fi

	if test x$use_qt = xyes; then
	MOC_DEFS="-DQ_OS_MAC"
	base_frameworks="-framework Foundation -framework ApplicationServices -framework AppKit"
	AX_CHECK_LINK_FLAG([[$base_frameworks]],[LIBS="$LIBS $base_frameworks"],[AC_MSG_ERROR(could not find base frameworks)])
	fi

	CPPFLAGS="$CPPFLAGS -DMAC_OSX"
	TESTDEFS="-DBOOST_TEST_DYN_LINK"
	;;
	*)
	TESTDEFS="-DBOOST_TEST_DYN_LINK"
	;;
	esac

	if test x$use_comparison_tool != xno; then
	AC_SUBST(JAVA_COMPARISON_TOOL, $use_comparison_tool)
	fi

	if test x$use_lcov == xyes; then
	if test x$LCOV == x; then
	AC_MSG_ERROR("lcov testing requested but lcov not found")
	fi
	if test x$GCOV == x; then
	AC_MSG_ERROR("lcov testing requested but gcov not found")
	fi
	if test x$JAVA == x; then
	AC_MSG_ERROR("lcov testing requested but java not found")
	fi
	if test x$GENHTML == x; then
	AC_MSG_ERROR("lcov testing requested but genhtml not found")
	fi
	if test x$use_comparison_tool == x; then
	AC_MSG_ERROR("lcov testing requested but comparison tool was not specified")
	fi
	LCOV="$LCOV --gcov-tool=$GCOV"
	AX_CHECK_COMPILE_FLAG([--coverage],[CXXFLAGS="$CXXFLAGS --coverage"],
	[AC_MSG_ERROR("lcov testing requested but --coverage flag does not work")])
	fi

	dnl Require little endian
	AC_C_BIGENDIAN([AC_MSG_ERROR("Big Endian not supported")])

	dnl Check for pthread compile/link requirements
	AX_PTHREAD
	INCLUDES="$INCLUDES $PTHREAD_CFLAGS"

	# The following macro will add the necessary defines to bitcoin-config.h, but
	# they also need to be passed down to any subprojects. Pull the results out of
	# the cache and add them to CPPFLAGS.
	AC_SYS_LARGEFILE

	if test x$ac_cv_sys_file_offset_bits != x &&
	test x$ac_cv_sys_file_offset_bits != xno &&
	test x$ac_cv_sys_file_offset_bits != xunknown; then
	CPPFLAGS="$CPPFLAGS -D_FILE_OFFSET_BITS=$ac_cv_sys_file_offset_bits"
	fi

	if test x$ac_cv_sys_large_files != x &&
	test x$ac_cv_sys_large_files != xno &&
	test x$ac_cv_sys_large_files != xunknown; then
	CPPFLAGS="$CPPFLAGS -D_LARGE_FILES=$ac_cv_sys_large_files"
	fi

	AX_CHECK_LINK_FLAG([[-Wl,--large-address-aware]], [LDFLAGS="$LDFLAGS -Wl,--large-address-aware"])

	if test x$use_hardening != xno; then
	AX_CHECK_COMPILE_FLAG([-Wstack-protector],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -Wstack-protector"])
	AX_CHECK_COMPILE_FLAG([-fPIE],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fPIE"])

	AX_CHECK_PREPROC_FLAG([-D_FORTIFY_SOURCE=2],[HARDENED_CPPFLAGS="$HARDENED_CPPFLAGS -D_FORTIFY_SOURCE=2"])

	AX_CHECK_LINK_FLAG([[-Wl,--dynamicbase]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,--dynamicbase"])
	AX_CHECK_LINK_FLAG([[-Wl,--nxcompat]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,--nxcompat"])
	AX_CHECK_LINK_FLAG([[-Wl,-z,relro]], [LDFLAGS="-Wl,-z,relro"])
	AX_CHECK_LINK_FLAG([[-Wl,-z,now]], [LDFLAGS="-Wl,-z,now"])

	if test x$TARGET_OS != xwindows; then
	# -fstack-protector-all can produce broken binaries with mingw
	AX_CHECK_COMPILE_FLAG([-fno-stack-protector],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fno-stack-protector"])
	AX_CHECK_COMPILE_FLAG([-fstack-protector-all],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fstack-protector-all"])

	# -pie will link successfully with mingw, but it's unsupported and leads to undeterministic binaries
	AX_CHECK_LINK_FLAG([[-pie]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -pie"])
	fi

	CXXFLAGS="$CXXFLAGS $HARDENED_CXXFLAGS"
	CPPFLAGS="$CPPFLAGS $HARDENED_CPPFLAGS"
	LDFLAGS="$LDFLAGS $HARDENED_LDFLAGS"
	OBJCXXFLAGS="$CXXFLAGS"
	fi

	dnl this flag screws up non-darwin gcc even when the check fails. special-case it.
	if test x$TARGET_OS = xdarwin; then
	AX_CHECK_LINK_FLAG([[-Wl,-dead_strip]], [LDFLAGS="$LDFLAGS -Wl,-dead_strip"])
	fi

	AC_CHECK_HEADERS([stdio.h stdlib.h unistd.h strings.h sys/types.h sys/stat.h])

	dnl Check for MSG_NOSIGNAL
	AC_MSG_CHECKING(for MSG_NOSIGNAL)
	AC_TRY_COMPILE([#include <sys/socket.h>],
	[ int f = MSG_NOSIGNAL; ],
	[ AC_MSG_RESULT(yes); AC_DEFINE(HAVE_MSG_NOSIGNAL, 1,[Define this symbol if you have MSG_NOSIGNAL]) ],
	[ AC_MSG_RESULT(no)]
	)

	dnl Check for libdb_cxx
	BITCOIN_FIND_BDB48

	dnl Check for libminiupnpc (optional)
	if test x$use_upnp != xno; then
	AC_CHECK_LIB([miniupnpc], [main],, [have_miniupnpc=no])
	fi

	dnl Check for boost libs
	AX_BOOST_BASE
	AX_BOOST_SYSTEM
	AX_BOOST_FILESYSTEM
	AX_BOOST_PROGRAM_OPTIONS
	AX_BOOST_THREAD
	AX_BOOST_CHRONO

	if test x$use_tests = xyes; then

	if test x$HEXDUMP = x; then
	AC_MSG_ERROR(hexdump is required for tests)
	fi


	AX_BOOST_UNIT_TEST_FRAMEWORK
	fi

	BOOST_LIBS="$BOOST_LDFLAGS $BOOST_SYSTEM_LIB $BOOST_FILESYSTEM_LIB $BOOST_PROGRAM_OPTIONS_LIB $BOOST_THREAD_LIB"
	BOOST_INCLUDES="$BOOST_CPPFLAGS"

	dnl Boost >= 1.50 uses sleep_for rather than the now-deprecated sleep, however
	dnl it was broken from 1.50 to 1.52 when backed by nanosleep. Use sleep_for if
	dnl a working version is available, else fall back to sleep. sleep was removed
	dnl after 1.56.
	dnl If neither is available, abort.
	dnl If sleep_for is used, boost_chrono becomes a requirement.
	if test x$ax_cv_boost_chrono = xyes; then
	TEMP_LIBS="$LIBS"
	LIBS="$LIBS $BOOST_LIBS $BOOST_CHRONO_LIB"
	AC_TRY_LINK([
	#include <boost/thread/thread.hpp>
	#include <boost/version.hpp>
	],[
	#if BOOST_VERSION >= 105000 && (!defined(BOOST_HAS_NANOSLEEP) \|\| BOOST_VERSION >= 105200)
	boost::this_thread::sleep_for(boost::chrono::milliseconds(0));
	#else
	choke me
	#endif
	],
	[boost_sleep=yes; BOOST_LIBS="$BOOST_LIBS $BOOST_CHRONO_LIB";
	AC_DEFINE(HAVE_WORKING_BOOST_SLEEP_FOR, 1, [Define this symbol if boost sleep_for works])],
	[boost_sleep=no])
	LIBS="$TEMP_LIBS"
	fi

	if test x$boost_sleep != xyes; then
	TEMP_LIBS="$LIBS"
	LIBS="$LIBS $BOOST_LIBS"
	AC_TRY_LINK([
	#include <boost/version.hpp>
	#include <boost/thread.hpp>
	#include <boost/date_time/posix_time/posix_time_types.hpp>
	],[
	#if BOOST_VERSION <= 105600
	boost::this_thread::sleep(boost::posix_time::milliseconds(0));
	#else
	choke me
	#endif
	],
	[boost_sleep=yes; AC_DEFINE(HAVE_WORKING_BOOST_SLEEP, 1, [Define this symbol if boost sleep works])],
	[boost_sleep=no])
	LIBS="$TEMP_LIBS"
	fi

	if test x$boost_sleep != xyes; then
	AC_MSG_ERROR(No working boost sleep implementation found)
	fi

	if test x$use_pkgconfig = xyes; then

	if test x$PKG_CONFIG == x; then
	AC_MSG_ERROR(pkg-config not found.)
	fi

	: #NOP
	m4_ifdef(
	[PKG_CHECK_MODULES],
	[
	PKG_CHECK_MODULES([SSL], [libssl], [INCLUDES="$INCLUDES $SSL_CFLAGS"; LIBS="$LIBS $SSL_LIBS"], [AC_MSG_ERROR(openssl not found.)])
	PKG_CHECK_MODULES([CRYPTO], [libcrypto], [INCLUDES="$INCLUDES $CRYPTO_CFLAGS"; LIBS="$LIBS $CRYPTO_LIBS"], [AC_MSG_ERROR(libcrypto not found.)])

	if test x$use_qt = xyes; then
	PKG_CHECK_MODULES([QT], [QtCore QtGui QtNetwork], [QT_INCLUDES="$QT_CFLAGS"; have_qt=yes], [have_qt=no])
	if test x$use_tests = xyes; then
	PKG_CHECK_MODULES([QT_TEST], [QtTest], [QT_TEST_INCLUDES="$QT_TEST_CFLAGS"; have_qt_test=yes], [have_qt_test=no])
	fi
	if test x$use_dbus != xno; then
	PKG_CHECK_MODULES([QT_DBUS], [QtDBus], [QT_DBUS_INCLUDES="$QT_DBUS_CFLAGS"; have_qt_dbus=yes], [have_qt_dbus=no])
	fi
	if test x$use_qr != xno; then
	PKG_CHECK_MODULES([QR], [libqrencode], [have_qrencode=yes], [have_qrencode=no])
	fi
	PKG_CHECK_MODULES([PROTOBUF], [protobuf], [have_protobuf=yes], [AC_MSG_ERROR(libprotobuf not found.)])
	fi
	]
	)
	else
	AC_CHECK_HEADER([openssl/crypto.h],,AC_MSG_ERROR(libcrypto headers missing))
	AC_CHECK_LIB([crypto], [main],, AC_MSG_ERROR(libcrypto missing))

	AC_CHECK_HEADER([openssl/ssl.h],, AC_MSG_ERROR(libssl headers missing),)
	AC_CHECK_LIB([ssl], [main],, AC_MSG_ERROR(libssl missing))

	if test x$use_qt = xyes; then
	TEMP_LIBS="$LIBS"
	LIBS=
	if test x$qt_lib_path != x; then
	QT_LIBS="$QT_LIBS -L$qt_lib_path"
	LIBS="$QT_LIBS"
	fi
	if test x$qt_plugin_path != x; then
	QT_LIBS="$QT_LIBS -L$qt_plugin_path/codecs"
	LIBS="$QT_LIBS"
	fi

	if test x$TARGET_OS == xwindows; then
	AC_CHECK_LIB([imm32], [main],, AC_MSG_ERROR(libimm32 not found. Install it or use --without-qt.))
	fi

	#TODO: These are only needed when they're linked directly to parent libs. It really has nothing to do with windows.
	#Instead, check for missing functions in parent libs and assume static if they're absent.
	if test x$TARGET_OS == xwindows; then
	AC_CHECK_LIB([qcncodecs], [main],, AC_MSG_ERROR(libqcncodecs not found. Install it or use --without-qt.))
	AC_CHECK_LIB([qjpcodecs], [main],, AC_MSG_ERROR(libqjpcodecs not found. Install it or use --without-qt.))
	AC_CHECK_LIB([qkrcodecs], [main],, AC_MSG_ERROR(libqkrcodecs not found. Install it or use --without-qt.))
	AC_CHECK_LIB([qtwcodecs], [main],, AC_MSG_ERROR(libqtwcodecs not found. Install it or use --without-qt.))
	fi

	AC_CHECK_LIB([QtCore], [main],, AC_MSG_ERROR(libQtCore not found. Install it or use --without-qt.))
	AC_CHECK_LIB([QtGui], [main],, AC_MSG_ERROR(libQtGui not found. Install it or use --without-qt.))
	AC_CHECK_LIB([QtNetwork], [main],, AC_MSG_ERROR(libQtNetwork not found. Install it or use --without-qt.))
	AC_CHECK_LIB([protobuf], [main],, AC_MSG_ERROR(libprotobuf not found. Install it or use --without-qt.))
	QT_LIBS="$LIBS"
	LIBS="$TEMP_LIBS"

	TEMP_CPPFLAGS="$CPPFLAGS"
	if test x$qt_include_path != x; then
	QT_INCLUDES="-I$qt_include_path -I$qt_include_path/QtCore -I$qt_include_path/QtGui -I$qt_include_path/QtNetwork -I$qt_include_path/QtTest -I$qt_include_path/QtDBus"
	CPPFLAGS="$CPPFLAGS $QT_INCLUDES"
	fi
	AC_CHECK_HEADER([QtPlugin],, AC_MSG_ERROR(QtCore headers missing. Install them or use --without-qt.),)
	AC_CHECK_HEADER([QApplication],, AC_MSG_ERROR(QtGUI headers missing. Install them or use --without-qt.),)
	AC_CHECK_HEADER([QLocalSocket],, AC_MSG_ERROR(QtNetwork headers missing. Install them or use --without-qt.),)

	if test x$use_tests = xyes; then
	TEMP_LIBS="$LIBS"
	LIBS=
	if test x$qt_lib_path != x; then
	LIBS="-L$qt_lib_path"
	fi
	AC_CHECK_LIB([QtTest], [main],, have_qt_test=no)
	AC_CHECK_HEADER([QTest],, have_qt_test=no)
	QT_TEST_LIBS="$LIBS"
	LIBS="$TEMP_LIBS"
	fi
	if test x$use_dbus != xno; then
	TEMP_LIBS="$LIBS"
	LIBS=
	if test x$qt_lib_path != x; then
	LIBS="-L$qt_lib_path"
	fi
	AC_CHECK_LIB([QtDBus], [main],, have_qt_dbus=no)
	AC_CHECK_HEADER([QtDBus],, have_qt_dbus=no)
	QT_DBUS_LIBS="$LIBS"
	LIBS="$TEMP_LIBS"
	fi
	CPPFLAGS="$TEMP_CPPFLAGS"
	if test x$use_qr != xno; then
	AC_CHECK_LIB([qrencode], [main],, [have_qrencode=no])
	AC_CHECK_HEADER([qrencode.h],, have_qrencode=no)
	fi
	fi
	fi

	if test x$use_ipv6 = xyes; then
	dnl Check for ipv6 build requirements
	AC_MSG_CHECKING(for IPV6 build support)
	AC_TRY_LINK([
	#if defined(_WINDOWS)
	#include <winsock2.h>
	#else
	#include <sys/types.h>
	#include <sys/socket.h>
	#include <netinet/in.h>
	#endif
	],[
	#if !defined(_WINDOWS)
	struct in6_addr ipv6Addr;
	struct sockaddr_in6 addr;
	#endif
	int temp = socket(AF_INET6, SOCK_STREAM, 0);],
	[AC_MSG_RESULT(yes); have_ipv6=yes; AC_DEFINE(HAVE_IPV6, 1, [Define this symbol if you have ipv6 build support])],
	[AC_MSG_RESULT(no)]; have_ipv6=no)
	fi
	AC_LANG_POP

	if test "x$use_ccache" != "xno"; then
	AC_MSG_CHECKING(if ccache should be enabled)
	if test x$CCACHE = x; then
	if test "x$use_ccache" = "xyes"; then
	AC_MSG_ERROR([ccache not found.]);
	else
	AC_MSG_NOTICE([ccache not found. Falling back to default CC])
	use_ccache=no
	fi
	else
	use_ccache=yes
	CC="$ac_cv_path_CCACHE $CC"
	CXX="$ac_cv_path_CCACHE $CXX"
	fi
	AC_MSG_RESULT($use_ccache)
	fi

	dnl enable ipv6 support
	AC_MSG_CHECKING([if ipv6 should be enabled])
	if test x$have_ipv6 = xno; then
	if test x$use_ipv6 = xyes; then
	AC_MSG_ERROR("ipv6 requested but cannot be built. use --disable-ipv6")
	fi
	AC_MSG_RESULT(no)
	else
	if test x$use_ipv6 = xyes; then
	AC_MSG_RESULT(yes)
	AC_DEFINE([USE_IPV6],[1],[Define if ipv6 support should be compiled in])
	else
	AC_MSG_RESULT(no)
	fi
	fi

	dnl enable upnp support
	AC_MSG_CHECKING([if upnp should be enabled])
	if test x$have_miniupnpc = xno; then
	if test x$use_upnp = xyes; then
	AC_MSG_ERROR("upnp requested but cannot be built. use --without-miniupnpc")
	fi
	AC_MSG_RESULT(no)
	else
	if test x$use_upnp != xno; then
	AC_MSG_RESULT(yes)
	AC_MSG_CHECKING([if upnp should be on by default])
	use_upnp=yes
	upnp_setting=0
	if test x$use_upnp_default != xno; then
	use_upnp_default=yes
	upnp_setting=1
	fi
	AC_MSG_RESULT($use_upnp_default)
	AC_DEFINE_UNQUOTED([USE_UPNP],[$upnp_setting],[Define to 1 for upnp runtime support])
	if test x$TARGET_OS = xwindows; then
	CPPFLAGS="$CPPFLAGS -DSTATICLIB"
	fi
	else
	AC_MSG_RESULT(no)
	fi
	fi

	dnl enable qt support
	AC_MSG_CHECKING([if qt should be enabled])
	if test x$use_qt = xyes; then
	if test x$have_qt = xno; then
	AC_MSG_ERROR("qt support requested but qt could not be located. use --without-qt")
	fi
	if test x$MOC = x; then
	AC_MSG_ERROR("qt support requested but moc was not found. use --without-qt")
	fi
	if test x$PROTOC = x; then
	AC_MSG_ERROR("qt support requested but protoc was not found. use --without-qt")
	fi
	if test x$UIC = x; then
	AC_MSG_ERROR("qt support requested but uic was not found. use --without-qt")
	fi
	if test x$RCC = x; then
	AC_MSG_ERROR("qt support requested but rcc was not found. use --without-qt")
	fi
	if test x$LRELEASE = x; then
	AC_MSG_ERROR("qt support requested but lrelease was not found. use --without-qt")
	fi
	if test x$use_tests = xyes; then
	if test x$have_qt_test = xno; then
	AC_MSG_ERROR("libQtTest not found. Use --disable-tests or --without-qt.")
	fi
	fi
	if test x$have_qt_dbus = xno; then
	use_dbus=no
	if test x$use_dbus = xyes; then
	AC_MSG_ERROR("libQtDBus not found. Use --without-qtdbus.")
	fi
	fi
	if test x$XGETTEXT == x; then
	AC_MSG_WARN("xgettext is required to update qt translations")
	fi
	if test x$LUPDATE == x; then
	AC_MSG_WARN("lupdate is required to update qt translations")
	fi

	BUILD_QT=qt
	else
	use_qt=no
	fi

	AC_MSG_RESULT($use_qt)

	dnl these are only used when qt is enabled
	if test x$use_qt = xyes; then

	dnl enable dbus support
	AC_MSG_CHECKING([if dbus should be enabled])
	if test x$use_dbus != xno; then
	use_dbus=yes
	AC_DEFINE([USE_DBUS],[1],[Define if dbus support should be compiled in])
	else
	use_dbus=no
	fi
	AC_MSG_RESULT($use_dbus)

	dnl enable qr support
	AC_MSG_CHECKING([if qr should be enabled])
	if test x$have_qrencode = xno; then
	if test x$use_qr == xyes; then
	AC_MSG_ERROR("QR support requested but cannot be built. use --without-qrencode")
	fi
	AC_MSG_RESULT(no)
	else
	if test x$use_qr != xno; then
	AC_MSG_RESULT(yes)
	AC_DEFINE([USE_QRCODE],[1],[Define if QR support should be compiled in])
	use_qr=yes
	else
	AC_MSG_RESULT(no)
	fi
	fi

	if test x$use_tests = xyes; then
	BUILD_TEST_QT="test"
	fi
	fi

	if test x$use_tests = xyes; then
	BUILD_TEST="test"
	fi

	AM_CONDITIONAL([TARGET_DARWIN], [test x$TARGET_OS = xdarwin])
	AM_CONDITIONAL([TARGET_WINDOWS], [test x$TARGET_OS = xwindows])
	AM_CONDITIONAL([USE_QRCODE], [test x$use_qr = xyes])
	AM_CONDITIONAL([USE_LCOV],[test x$use_lcov == xyes])
	AM_CONDITIONAL([USE_COMPARISON_TOOL],[test x$use_comparison_tool != xno])

	AC_DEFINE(CLIENT_VERSION_MAJOR, _CLIENT_VERSION_MAJOR, [Major version])
	AC_DEFINE(CLIENT_VERSION_MINOR, _CLIENT_VERSION_MINOR, [Minor version])
	AC_DEFINE(CLIENT_VERSION_REVISION, _CLIENT_VERSION_REVISION, [Build revision])
	AC_DEFINE(CLIENT_VERSION_BUILD, _CLIENT_VERSION_BUILD, [Version Build])
	AC_DEFINE(CLIENT_VERSION_IS_RELEASE, _CLIENT_VERSION_IS_RELEASE, [Version is release])
	AC_DEFINE(COPYRIGHT_YEAR, _COPYRIGHT_YEAR, [Version is release])
	AC_SUBST(CLIENT_VERSION_MAJOR, _CLIENT_VERSION_MAJOR)
	AC_SUBST(CLIENT_VERSION_MINOR, _CLIENT_VERSION_MINOR)
	AC_SUBST(CLIENT_VERSION_REVISION, _CLIENT_VERSION_REVISION)
	AC_SUBST(CLIENT_VERSION_BUILD, _CLIENT_VERSION_BUILD)
	AC_SUBST(CLIENT_VERSION_IS_RELEASE, _CLIENT_VERSION_IS_RELEASE)
	AC_SUBST(COPYRIGHT_YEAR, _COPYRIGHT_YEAR)


	AC_SUBST(USE_UPNP)
	AC_SUBST(USE_QRCODE)
	AC_SUBST(USE_IPV6)
	AC_SUBST(INCLUDES)
	AC_SUBST(BOOST_LIBS)
	AC_SUBST(MOC_DEFS)
	AC_SUBST(QT_INCLUDES)
	AC_SUBST(QT_TEST_LIBS)
	AC_SUBST(QT_LIBS)
	AC_SUBST(QT_DBUS_LIBS)
	AC_SUBST(QT_DBUS_INCLUDES)
	AC_SUBST(QT_TEST_INCLUDES)
	AC_SUBST(TESTDEFS)
	AC_SUBST(LEVELDB_TARGET_FLAGS)
	AC_SUBST(BUILD_QT)
	AC_SUBST(BUILD_TEST)
	AC_SUBST(BUILD_TEST_QT)
	AC_CONFIG_FILES([Makefile src/Makefile src/test/Makefile src/qt/Makefile src/qt/test/Makefile share/setup.nsi share/qt/Info.plist])
	AC_CONFIG_FILES([qa/pull-tester/run-bitcoind-for-test.sh],[chmod +x qa/pull-tester/run-bitcoind-for-test.sh])
	AC_CONFIG_FILES([qa/pull-tester/build-tests.sh],[chmod +x qa/pull-tester/build-tests.sh])
	AC_OUTPUT

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