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#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.
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AC_PREREQ([2.59])
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AC_INIT(bind10, 20130529, bind10-dev@isc.org)
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AC_CONFIG_SRCDIR(README)
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# serial-tests is not available in automake version before 1.13. In
# automake 1.13 and higher, AM_PROG_INSTALL is undefined, so we'll check
# that and conditionally use serial-tests.
AM_INIT_AUTOMAKE(
	[foreign]
	m4_ifndef([AM_PROG_INSTALL], [serial-tests])
)
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m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])dnl be backward compatible
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AC_CONFIG_HEADERS([config.h])
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AC_CONFIG_MACRO_DIR([m4macros])
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# Checks for programs.
AC_PROG_CXX
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# Enable low-performing debugging facilities? This option optionally
# enables some debugging aids that perform slowly and hence aren't built
# by default.
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AC_ARG_ENABLE([debug],
  AS_HELP_STRING([--enable-debug],
    [enable debugging (default is no)]),
  [case "${enableval}" in
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    yes) debug_enabled=yes ;;
    no)  debug_enabled=no ;;
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    *)   AC_MSG_ERROR([bad value ${enableval} for --enable-debug]) ;;
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  esac],[debug_enabled=no])
AM_CONDITIONAL([DEBUG_ENABLED], [test x$debug_enabled = xyes])
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AM_COND_IF([DEBUG_ENABLED], [AC_DEFINE([ENABLE_DEBUG], [1], [Enable low-performing debugging facilities?])])
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# Libtool configuration
#
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# libtool cannot handle spaces in paths, so exit early if there is one
if [ test `echo $PWD | grep -c ' '` != "0"  ]; then
    AC_MSG_ERROR([BIND 10 cannot be built in a directory that contains spaces, because of libtool limitations. Please change the directory name, or use a symbolic link that does not contain spaces.])
fi

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# On FreeBSD (and probably some others), clang++ does not meet an autoconf
# assumption in identifying libtool configuration regarding shared library:
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# the configure script will execute "$CC -shared $CFLAGS/$CXXFLAGS -v" and
# expect the output contains -Lxxx or -Ryyy.  This is the case for g++, but
# not for clang++, and, as a result, it will cause various errors in linking
# programs or running them with a shared object (such as some of our python
# scripts).
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# To work around this problem we define a temporary variable
# "CXX_LIBTOOL_LDFLAGS".  It's expected to be defined as, e.g, "-L/usr/lib"
# to temporarily fake the output so that it will be compatible with that of
# g++.
CFLAGS_SAVED=$CFLAGS
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CXXFLAGS_SAVED=$CXXFLAGS
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CFLAGS="$CFLAGS $CXX_LIBTOOL_LDFLAGS"
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CXXFLAGS="$CXXFLAGS $CXX_LIBTOOL_LDFLAGS"
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AC_PROG_LIBTOOL
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CFLAGS=$CFLAGS_SAVED
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CXXFLAGS=$CXXFLAGS_SAVED
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# Use C++ language
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AC_LANG([C++])

# Identify the compiler: this check must be after AC_PROG_CXX and AC_LANG.
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AM_CONDITIONAL(USE_GXX, test "X${GXX}" = "Xyes")
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AC_CHECK_DECL([__SUNPRO_CC], [SUNCXX="yes"], [SUNCXX="no"])
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AC_CHECK_DECL([__clang__], [CLANGPP="yes"], [CLANGPP="no"])
AM_CONDITIONAL(USE_CLANGPP, test "X${CLANGPP}" = "Xyes")
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dnl Determine if weare using GNU sed
GNU_SED=no
$SED --version 2> /dev/null | grep -q GNU
if test $? -eq 0; then
  GNU_SED=yes
fi

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# Linker options

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# check -R, "-Wl,-R" or -rpath (we share the AX function defined in
#  examples/m4)
AX_ISC_RPATH
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# Compiler dependent settings: define some mandatory CXXFLAGS here.
# We also use a separate variable B10_CXXFLAGS.  This will (and should) be
# used as the default value for each specific AM_CXXFLAGS:
# AM_CXXFLAGS = $(B10_CXXFLAGS)
# AM_CXXFLAGS += ... # add module specific flags
# We need this so that we can disable some specific compiler warnings per
# module basis; since AM_CXXFLAGS are placed before CXXFLAGS, and since
# gcc's -Wno-XXX option must be specified after -Wall or -Wextra, we cannot
# specify the default warning flags in CXXFLAGS and let specific modules
# "override" the default.

# This may be used to try linker flags.
AC_DEFUN([BIND10_CXX_TRY_FLAG], [
  AC_MSG_CHECKING([whether $CXX supports $1])

  bind10_save_CXXFLAGS="$CXXFLAGS"
  CXXFLAGS="$CXXFLAGS $1"

  AC_LINK_IFELSE([AC_LANG_SOURCE([int main(void){ return 0;}])],
                 [bind10_cxx_flag=yes], [bind10_cxx_flag=no])
  CXXFLAGS="$bind10_save_CXXFLAGS"

  if test "x$bind10_cxx_flag" = "xyes"; then
    ifelse([$2], , :, [$2])
  else
    ifelse([$3], , :, [$3])
  fi

  AC_MSG_RESULT([$bind10_cxx_flag])
])

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CXX_VERSION="unknown"

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# SunStudio compiler requires special compiler options for boost
# (http://blogs.sun.com/sga/entry/boost_mini_howto)
if test "$SUNCXX" = "yes"; then
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CXX_VERSION=`$CXX -V 2> /dev/null | head -1`
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CXXFLAGS="$CXXFLAGS -library=stlport4 -features=tmplife -features=tmplrefstatic"
MULTITHREADING_FLAG="-mt"
fi

# Newer versions of clang++ promotes "unused driver arguments" warnings to
# a fatal error with -Werror, causing build failure.  Since we use multiple
# compilers on multiple systems, this can easily happen due to settings for
# non clang++ environments that could be just ignored otherwise.  It can also
# happen if clang++ is used via ccache.  So, although probably suboptimal,
# we suppress this particular warning.  Note that it doesn't weaken checks
# on the source code.
if test "$CLANGPP" = "yes"; then
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CXX_VERSION=`$CXX --version 2> /dev/null | head -1`
B10_CXXFLAGS="$B10_CXXFLAGS -Qunused-arguments"
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fi

BIND10_CXX_TRY_FLAG([-Wno-missing-field-initializers],
	[WARNING_NO_MISSING_FIELD_INITIALIZERS_CFLAG="-Wno-missing-field-initializers"])
AC_SUBST(WARNING_NO_MISSING_FIELD_INITIALIZERS_CFLAG)

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# clang's -Wtautological-constant-out-of-range-compare triggers spurious
# warnings in some of the code, so we have to selectively disable it.
BIND10_CXX_TRY_FLAG([-Wno-tautological-constant-out-of-range-compare],
	[WARNING_NO_TAUTOLOGICAL_CONSTANT_OOR_COMP_CFLAG="-Wno-tautological-constant-out-of-range-compare"])
AC_SUBST(WARNING_NO_TAUTOLOGICAL_CONSTANT_OOR_COMP_CFLAG)

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# gcc specific settings:
if test "X$GXX" = "Xyes"; then
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CXX_VERSION=`$CXX --version 2> /dev/null | head -1`
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B10_CXXFLAGS="$B10_CXXFLAGS -Wall -Wextra -Wnon-virtual-dtor -Wwrite-strings -Woverloaded-virtual -Wno-sign-compare"
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case "$host" in
*-solaris*)
	MULTITHREADING_FLAG=-pthreads
	# In Solaris, IN6ADDR_ANY_INIT and IN6ADDR_LOOPBACK_INIT need -Wno-missing-braces
	B10_CXXFLAGS="$B10_CXXFLAGS -Wno-missing-braces"
	;;
*)
	MULTITHREADING_FLAG=-pthread
	;;
esac

# Don't use -Werror if configured not to
AC_ARG_WITH(werror,
    AC_HELP_STRING([--with-werror], [Compile using -Werror (default=yes)]),
    [
     case "${withval}" in
         yes) with_werror=1 ;;
         no)  with_werror=0 ;;
         *)   AC_MSG_ERROR(bad value ${withval} for --with-werror) ;;
     esac],
     [with_werror=1])

werror_ok=0

# Certain versions of gcc (g++) have a bug that incorrectly warns about
# the use of anonymous name spaces even if they're closed in a single
# translation unit.  For these versions we have to disable -Werror.
if test $with_werror = 1; then
   CXXFLAGS_SAVED="$CXXFLAGS"
   CXXFLAGS="$CXXFLAGS $B10_CXXFLAGS -Werror"
   AC_MSG_CHECKING(for in-TU anonymous namespace breakage)
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   # We use struct, not class, here, because some compilers complain about
   # "unused private members", causing a false positive.
   AC_TRY_COMPILE([namespace { struct Foo {}; }
   namespace isc {struct Bar {Foo foo_;};} ],,
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	[AC_MSG_RESULT(no)
	 werror_ok=1
	 B10_CXXFLAGS="$B10_CXXFLAGS -Werror"],
	[AC_MSG_RESULT(yes)])
   CXXFLAGS="$CXXFLAGS_SAVED"
fi

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fi				dnl GXX = yes

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# allow building programs with static link.  we need to make it selective
# because loadable modules cannot be statically linked.
AC_ARG_ENABLE([static-link],
AC_HELP_STRING([--enable-static-link],
  [build programs with static link [[default=no]]]),
  [enable_static_link=yes], [enable_static_link=no])
AM_CONDITIONAL(USE_STATIC_LINK, test $enable_static_link = yes)
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AM_COND_IF([USE_STATIC_LINK], [AC_DEFINE([USE_STATIC_LINK], [1], [BIND 10 was statically linked?])])
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# Check validity about some libtool options
if test $enable_static_link = yes -a $enable_static = no; then
	AC_MSG_ERROR([--enable-static-link requires --enable-static])
fi
if test $enable_shared = no; then
	AC_MSG_ERROR([BIND 10 requires shared libraries to be built])
fi

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# allow configuring without setproctitle.
AC_ARG_ENABLE(setproctitle-check,
AC_HELP_STRING([--disable-setproctitle-check],
  [do not check for python setproctitle module (used to give nice names to python processes)]),
  setproctitle_check=$enableval, setproctitle_check=yes)

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# OS dependent configuration
SET_ENV_LIBRARY_PATH=no
ENV_LIBRARY_PATH=LD_LIBRARY_PATH

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case "$host" in
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*-solaris*)
	# Solaris requires special definitions to get some standard libraries
	# (e.g. getopt(3)) available with common used header files.
	CPPFLAGS="$CPPFLAGS -D_XPG4_2 -D__EXTENSIONS__"
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	# "now" binding is necessary to prevent deadlocks in C++ static initialization code
	LDFLAGS="$LDFLAGS -z now"
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	# Destroying locked mutexes, condition variables being waited
	# on, etc. are undefined behavior on Solaris, so we set it as
	# such here.
	AC_DEFINE([HAS_UNDEFINED_PTHREAD_BEHAVIOR], [1], [Does this platform have some undefined pthreads behavior?])
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	;;
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*-apple-darwin*)
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	# Starting with OSX 10.7 (Lion) we must choose which IPv6 API to use
	# (RFC2292 or RFC3542).
	CPPFLAGS="$CPPFLAGS -D__APPLE_USE_RFC_3542"

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	# libtool doesn't work perfectly with Darwin: libtool embeds the
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	# final install path in dynamic libraries and our loadable python
	# modules always refer to that path even if it's loaded within the
	# source tree.  This prevents pre-install tests from working.
	# To work around this problem we explicitly specify paths to dynamic
	# libraries when we use them in the source tree.
	SET_ENV_LIBRARY_PATH=yes
	ENV_LIBRARY_PATH=DYLD_LIBRARY_PATH
	;;
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*-freebsd*)
	SET_ENV_LIBRARY_PATH=yes
	;;
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*-netbsd*)
	SET_ENV_LIBRARY_PATH=yes
	;;
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*-openbsd*)
	SET_ENV_LIBRARY_PATH=yes
	;;
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esac
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AM_CONDITIONAL(SET_ENV_LIBRARY_PATH, test $SET_ENV_LIBRARY_PATH = yes)
AC_SUBST(SET_ENV_LIBRARY_PATH)
AC_SUBST(ENV_LIBRARY_PATH)
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# Our experiments have shown Solaris 10 has broken support for the
# IPV6_USE_MIN_MTU socket option for getsockopt(); it doesn't return the value
# previously set via setsockopt().  We know it doesn't happen on one instance
# on Solaris 11, but we don't know whether it happens for any Solaris 10
# implementations or for earlier versions of Solaris.  In any case, at the
# moment this matters for only one unittest case, so we'll simply disable
# the affected test using the following definition with the specific hardcoding
# of that version of Solaris.
case "$host" in
*-solaris2.10)
	AC_DEFINE([HAVE_BROKEN_GET_IPV6_USE_MIN_MTU], [1],
	[Define to 1 if getsockopt(IPV6_USE_MIN_MTU) does not work])
	;;
esac

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m4_define([_AM_PYTHON_INTERPRETER_LIST], [python python3.3 python3.2 python3.1 python3])
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AC_ARG_WITH([pythonpath],
AC_HELP_STRING([--with-pythonpath=PATH],
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  [specify an absolute path to python executable when automatic version check (incorrectly) fails]),
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  [python_path="$withval"], [python_path="auto"])
if test "$python_path" = auto; then
	AM_PATH_PYTHON([3.1])
else
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	# Older versions of automake can't handle python3 well.  This is an
	# in-house workaround for them.
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	PYTHON=$python_path
	AC_SUBST(PYTHON)
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	PYTHON_PREFIX='${prefix}'
	AC_SUBST(PYTHON_PREFIX)
	PYTHON_EXEC_PREFIX='$(exec_prefix)'
	AC_SUBST(PYTHON_EXEC_PREFIX)
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	PYTHON_VERSION=[`$PYTHON -c "import sys; sys.stdout.write(sys.version[:3])"`]
	if test `echo "$PYTHON_VERSION >= 3.1" | bc` != 1 ; then
		AC_MSG_ERROR(["Python version too old: $PYTHON_VERSION, need 3.1 or higher"])
	fi
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	AC_SUBST(PYTHON_VERSION)
	PYTHON_PLATFORM=`$PYTHON -c "import sys; print(sys.platform)"`
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	AC_SUBST(PYTHON_PLATFORM)
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	pythondir='${prefix}/lib/python'$PYTHON_VERSION'/site-packages'
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	AC_SUBST(pythondir)
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	pkgpythondir='${pythondir}/'$PACKAGE
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	AC_SUBST(pkgpythondir)
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	pyexecdir='${exec_prefix}/lib/python'$PYTHON_VERSION'/site-packages'
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	AC_SUBST(pyexecdir)
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	pkgpyexecdir='${pyexecdir}/'$PACKAGE
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	AC_SUBST(pkgpyexecdir)
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fi
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# We need to store the default pyexecdir in a separate variable so that
# we can specify in Makefile.am the install directory of various BIND 10
# python scripts and loadable modules; in Makefile.am we cannot replace
# $(pyexecdir) using itself, e.g, this doesn't work:
# pyexecdir = $(pyexecdir)/isc/some_module
# The separate variable makes this setup possible as follows:
# pyexecdir = $(PYTHON_SITEPKG_DIR)/isc/some_module
PYTHON_SITEPKG_DIR=${pyexecdir}
AC_SUBST(PYTHON_SITEPKG_DIR)

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# This will be commonly used in various Makefile.am's that need to generate
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# python log messages.
PYTHON_LOGMSGPKG_DIR="\$(top_builddir)/src/lib/python/isc/log_messages"
AC_SUBST(PYTHON_LOGMSGPKG_DIR)

# This is python package paths commonly used in python tests.  See
# README of log_messages for why it's included.
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# lib/dns/python/.libs is necessary because __init__.py of isc package
# automatically imports isc.datasrc, which then requires the DNS loadable
# module.  #2145 should eliminate the need for it.
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COMMON_PYTHON_PATH="\$(abs_top_builddir)/src/lib/python/isc/log_messages:\$(abs_top_builddir)/src/lib/python/isc/cc:\$(abs_top_srcdir)/src/lib/python:\$(abs_top_builddir)/src/lib/python:\$(abs_top_builddir)/src/lib/dns/python/.libs"
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AC_SUBST(COMMON_PYTHON_PATH)

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# Check for python development environments
if test -x ${PYTHON}-config; then
	PYTHON_INCLUDES=`${PYTHON}-config --includes`
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	# Add any '-L..." flags to PYTHON_LDFLAGS.  We first make a copy of
	# python-config --ldflags, removing any spaces and tabs
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	# between "-L" and its argument (some instances of python-config
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	# insert a space, which would confuse the code below).
	# Notes: if -L isn't contained at all we can simply skip this process,
	# so we only go through the flag if it's contained; also, protecting
	# the output with [] seems necessary for environment to avoid getting
	# an empty output accidentally.
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	python_config_ldflags=[`${PYTHON}-config --ldflags | ${SED} -ne 's/\([ \t]*-L\)[ ]*\([^ \t]*[ \t]*\)/\1\2/gp'`]
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	for flag in $python_config_ldflags; do
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		flag=`echo $flag | ${SED} -ne 's/^\(\-L.*\)$/\1/p'`
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		if test "X${flag}" != X; then
			PYTHON_LDFLAGS="$PYTHON_LDFLAGS ${flag}"
		fi
	done
	# on some platforms, ${PYTHON}-config --ldflags doesn't provide a -L
	# option while having the library under a non trivial directory.
	# as a workaround we try the "lib" sub directory under the common
	# prefix for this python.
	if test -z "${PYTHON_LDFLAGS}"; then
		PYTHON_LDFLAGS="-L`${PYTHON}-config --prefix`/lib"
	fi
else
	if test "X$PYTHON_INCLUDES" = X -o "X$PYTHON_LDFLAGS" = X; then
		AC_MSG_WARN([${PYTHON}-config does not exist or is not executable, so we could not detect python development environment.  Your system may require an additional package (e.g. "python3-dev").  Alternatively, if you are sure you have python headers and libraries, define PYTHON_INCLUDES and PYTHON_LDFLAGS and run this script.])
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	fi
fi
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# Some OSes including NetBSD don't install libpython.so in a well known path.
# To avoid requiring dynamic library path with our python wrapper loadable
# modules, we embed the path to the modules when possible.  We do this even
# when the path is known in the common operational environment (e.g. when
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# it's stored in a common "hint" file) for simplicity.
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if test "x$ISC_RPATH_FLAG" != "x"; then
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	python_rpath=
	for flag in ${PYTHON_LDFLAGS}; do
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		python_rpath="${python_rpath} `echo $flag | ${SED} -ne "s/^\(\-L\)/${ISC_RPATH_FLAG}/p"`"
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	done
	PYTHON_LDFLAGS="${PYTHON_LDFLAGS} ${python_rpath}"
fi

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AC_SUBST(PYTHON_INCLUDES)
AC_SUBST(PYTHON_LDFLAGS)

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CPPFLAGS_SAVED="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS ${PYTHON_INCLUDES}"
AC_CHECK_HEADERS([Python.h],, AC_MSG_ERROR([Missing Python.h]))
CPPFLAGS="$CPPFLAGS_SAVED"

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# Check for python library.  Needed for Python-wrapper libraries.
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LDFLAGS_SAVED="$LDFLAGS"
LDFLAGS="$LDFLAGS $PYTHON_LDFLAGS"
python_bin="python${PYTHON_VERSION}"
AC_CHECK_LIB($python_bin, main, python_lib=$python_bin, python_lib=no)
if test $python_lib != "no"; then
	PYTHON_LIB="-l$python_lib"
fi
AC_SUBST(PYTHON_LIB)
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LDFLAGS=$LDFLAGS_SAVED
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# Check for the setproctitle module
if test "$setproctitle_check" = "yes" ; then
    AC_MSG_CHECKING(for setproctitle module)
    if "$PYTHON" -c 'import setproctitle' 2>/dev/null ; then
        AC_MSG_RESULT(ok)
    else
        AC_MSG_RESULT(missing)
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        AC_MSG_WARN([Missing setproctitle python module.
Use --disable-setproctitle-check to skip this check.
In this case we will continue, but naming of python processes will not work.])
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    fi
fi

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# (g++ only check)
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# Python 3.2 has an unused parameter in one of its headers. This
# has been reported, but not fixed as of yet, so we check if we need
# to set -Wno-unused-parameter.
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if test "X$GXX" = "Xyes" -a $werror_ok = 1; then
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	CPPFLAGS_SAVED="$CPPFLAGS"
	CPPFLAGS=${PYTHON_INCLUDES}
	CXXFLAGS_SAVED="$CXXFLAGS"
	CXXFLAGS="$CXXFLAGS $B10_CXXFLAGS -Werror"
	AC_MSG_CHECKING([whether we need -Wno-unused-parameter for python])
	AC_TRY_COMPILE(
		[#include <Python.h>],
		[],
		[AC_MSG_RESULT(no)],
		[
		CXXFLAGS="$CXXFLAGS -Wno-unused-parameter"
		AC_TRY_COMPILE([#include <Python.h>],
		[],
		[AC_MSG_RESULT(yes)
		 PYTHON_CXXFLAGS="${PYTHON_CXXFLAGS} -Wno-unused-parameter"
		 AC_SUBST(PYTHON_CXXFLAGS)
		],
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		[AC_MSG_ERROR([Can't compile against Python.h.  If you're using MacOS X and have installed Python with Homebrew, see http://bind10.isc.org/wiki/SystemNotesMacOSX])]
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                )
                ]
	)
	CXXFLAGS="$CXXFLAGS_SAVED"
	CPPFLAGS="$CPPFLAGS_SAVED"
fi

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# produce PIC unless we disable shared libraries. need this for python bindings.
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if test $enable_shared != "no" -a "X$GXX" = "Xyes"; then
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   B10_CXXFLAGS="$B10_CXXFLAGS -fPIC"
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fi

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AC_SUBST(B10_CXXFLAGS)

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# Checks for libraries.

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AC_SEARCH_LIBS(inet_pton, [nsl])
AC_SEARCH_LIBS(recvfrom, [socket])
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AC_SEARCH_LIBS(nanosleep, [rt])
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AC_SEARCH_LIBS(dlsym, [dl])
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# Checks for header files.

# Checks for typedefs, structures, and compiler characteristics.
AC_HEADER_STDBOOL
AC_TYPE_SIZE_T

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# Detect OS type (it may be used to do OS-specific things, e.g.
# interface detection in DHCP)
AC_MSG_CHECKING(OS family)
system=`uname -s`
case $system in
    Linux)
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      OS_TYPE="Linux"
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      CPPFLAGS="$CPPFLAGS -DOS_LINUX"
      ;;
    Darwin | FreeBSD | NetBSD | OpenBSD)
      OS_TYPE="BSD"
      CPPFLAGS="$CPPFLAGS -DOS_BSD"
      ;;
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    SunOS)
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      OS_TYPE="Solaris"
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      CPPFLAGS="$CPPFLAGS -DOS_SUN"
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      ;;
    *)
      OS_TYPE="Unknown"
      AC_MSG_WARN("Unsupported OS: uname returned $system")
      ;;
esac
AC_MSG_RESULT($OS_TYPE)
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AM_CONDITIONAL(OS_LINUX, test $OS_TYPE = Linux)
AM_COND_IF([OS_LINUX], [AC_DEFINE([OS_LINUX], [1], [Running on Linux?])])
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AM_CONDITIONAL(OS_BSD, test $OS_TYPE = BSD)
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AM_COND_IF([OS_BSD], [AC_DEFINE([OS_BSD], [1], [Running on BSD?])])
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AM_CONDITIONAL(OS_SOLARIS, test $OS_TYPE = Solaris)
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AM_COND_IF([OS_SOLARIS], [AC_DEFINE([OS_SOLARIS], [1], [Running on Solaris?])])
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# Deal with variants
AM_CONDITIONAL(OS_FREEBSD, test $system = FreeBSD)
AM_COND_IF([OS_FREEBSD], [AC_DEFINE([OS_FREEBSD], [1], [Running on FreeBSD?])])
AM_CONDITIONAL(OS_NETBSD, test $system = NetBSD)
AM_COND_IF([OS_NETBSD], [AC_DEFINE([OS_NETBSD], [1], [Running on NetBSD?])])
AM_CONDITIONAL(OS_OPENBSD, test $system = OpenBSD)
AM_COND_IF([OS_OPENBSD], [AC_DEFINE([OS_OPENBSD], [1], [Running on OpenBSD?])])
AM_CONDITIONAL(OS_OSX, test $system = Darwin)
AM_COND_IF([OS_OSX], [AC_DEFINE([OS_OSX], [1], [Running on OSX?])])


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AC_MSG_CHECKING(for sa_len in struct sockaddr)
AC_TRY_COMPILE([
#include <sys/types.h>
#include <sys/socket.h>],
[struct sockaddr sa; sa.sa_len = 0; return (0);],
        [AC_MSG_RESULT(yes)
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        AC_DEFINE(HAVE_SA_LEN, 1, [Define to 1 if sockaddr has a sa_len member, and corresponding sin_len and sun_len])],
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        AC_MSG_RESULT(no))

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AC_ARG_WITH(pycoverage,
[  --with-pycoverage[=PROGRAM]         enable python code coverage using the specified coverage], pycoverage="$withval", pycoverage="no")
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if test "$pycoverage" = "no" ; then
	# just run the tests normally with python
	PYCOVERAGE_RUN="${PYTHON}"
	USE_PYCOVERAGE="no"
elif test "$pycoverage" = "yes" ; then
	PYCOVERAGE="coverage"
	PYCOVERAGE_RUN="${PYCOVERAGE} run --branch --append"
	USE_PYCOVERAGE="yes"
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else
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	PYCOVERAGE="$pycoverage"
	PYCOVERAGE_RUN="${PYCOVERAGE} run --branch --append"
	USE_PYCOVERAGE="yes"
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fi
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AM_CONDITIONAL(ENABLE_PYTHON_COVERAGE, test x$USE_PYCOVERAGE != xno)
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AC_SUBST(PYCOVERAGE)
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AC_SUBST(PYCOVERAGE_RUN)
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AC_SUBST(USE_PYCOVERAGE)
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enable_gtest="no"
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GTEST_INCLUDES=
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AC_ARG_WITH([gtest-source],
            [AS_HELP_STRING([--with-gtest-source=PATH],
                            [location of the Googletest source, defaults to /usr/src/gtest])],
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            [enable_gtest="yes" ; GTEST_SOURCE="$withval"],
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            [GTEST_SOURCE="/usr/src/gtest"])

AC_ARG_WITH([gtest],
	    [AS_HELP_STRING([--with-gtest=PATH],
			    [specify a path to gtest header files (PATH/include) and library (PATH/lib)])],
	[gtest_path="$withval"; enable_gtest="yes"], [gtest_path="no"])

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AC_ARG_WITH(lcov,
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[  --with-lcov[=PROGRAM]         enable gtest and coverage target using the specified lcov], lcov="$withval", lcov="no")
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USE_LCOV="no"
if test "$lcov" != "no"; then
	# force gtest if not set
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	if test "$enable_gtest" = "no"; then
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#		AC_MSG_ERROR("lcov needs gtest for test coverage report")
		AC_MSG_NOTICE([gtest support is now enabled, because used by coverage tests])
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		enable_gtest="yes"
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	fi
	if test "$lcov" != "yes"; then
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		LCOV=$lcov
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	else
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		AC_PATH_PROG([LCOV], [lcov])
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	fi
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	if test -x "${LCOV}"; then
		USE_LCOV="yes"
	else
		AC_MSG_ERROR([Cannot find lcov.])
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	fi
	# is genhtml always in the same directory?
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	GENHTML=`echo "$LCOV" | ${SED} s/lcov$/genhtml/`
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	if test ! -x $GENHTML; then
		AC_MSG_ERROR([genhtml not found, needed for lcov])
	fi
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	# GCC specific?
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	CXXFLAGS="$CXXFLAGS -fprofile-arcs -ftest-coverage"
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	LIBS=" $LIBS -lgcov"
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	AC_SUBST(CPPFLAGS)
	AC_SUBST(LIBS)
	AC_SUBST(LCOV)
	AC_SUBST(GENHTML)
fi
AC_SUBST(USE_LCOV)

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# Simplified, non-caching AC_CHECK_PROG
# Searches $PATH for the existence of argument 2,
# and sets the full path to the variable in argument 1.
# if not found, and a third argument is given, the value
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# is set to that. If not, the value is untouched.
# Does not take absolute paths into account at this point,
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# and also works for single files only (arguments are not
# stripped like in AC_CHECK_PROG)
AC_DEFUN([ACX_CHECK_PROG_NONCACHE], [
    RESULT=""
    IFS_SAVED="$IFS"
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    IFS=${PATH_SEPARATOR}
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    for cur_path in ${PATH} ; do
      if test -e "${cur_path}/$2" ; then
          RESULT="${cur_path}/$2"
      fi
    done
    if test "$RESULT" = "" ; then
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        :
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        m4_ifvaln([$3], [$1=$3])
    else
        $1=$RESULT
    fi
    IFS="$IFS_SAVED"
])

# Botan helper test function
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# Tries to compile a botan program, given the output of the given
# config tool
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# Arguments:
# - name of tool (checked for path), must support --libs and --cflags
# - fixed argument(s) for tool
# - action if successful
AC_DEFUN([ACX_TRY_BOTAN_TOOL], [
    TOOL=$1
    TOOL_ARG=$2
    BOTAN_TOOL=""
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    ACX_CHECK_PROG_NONCACHE([BOTAN_TOOL], [${TOOL}])
    AC_MSG_CHECKING([usability of ${TOOL} ${TOOL_ARG}])
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    if test "$BOTAN_TOOL" != "" ; then
        if test -x ${BOTAN_TOOL}; then
            BOTAN_LIBS=`$BOTAN_TOOL $TOOL_ARG --libs`
            LIBS_SAVED=${LIBS}
            LIBS="$LIBS $BOTAN_LIBS"
            BOTAN_INCLUDES=`$BOTAN_TOOL $TOOL_ARG --cflags`
            CPPFLAGS_SAVED=${CPPFLAGS}
            CPPFLAGS="$BOTAN_INCLUDES $CPPFLAGS"
            #AC_MSG_RESULT([found])
            AC_LINK_IFELSE(
                [AC_LANG_PROGRAM([#include <botan/botan.h>
                                  #include <botan/hash.h>
                                 ],
                                 [using namespace Botan;
                                  LibraryInitializer::initialize();
                                  HashFunction *h = get_hash("MD5");
                                 ])],
                [ AC_MSG_RESULT([ok])
                  $3
                ],
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                [ AC_MSG_RESULT([not usable]) ]
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            )
            LIBS=${LIBS_SAVED}
            CPPFLAGS=${CPPFLAGS_SAVED}
        else
            AC_MSG_RESULT([not executable])
        fi
    else
        AC_MSG_RESULT([not found])
    fi
    BOTAN_TOOL=""
    AC_SUBST(BOTAN_TOOL)
    ]
)

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# Check for Botan
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#
# Unless --with-botan-config is given, we first try to find these config
# scripts ourselves. Unfortunately, on some systems, these scripts do not
# provide the correct implementation, so for each script found, we try
# a compilation test (ACX_TRY_BOTAN_TOOL). If none are found, or none of
# them work, we see if pkg-config is available. If so, we try the several
# potential pkg-config .pc files. Again, on some systems, these can return
# incorrect information as well, so the try-compile test is repeated for
# each.
#
# If a working config script or pkgconfig file is found, we then munge its
# output for use in our Makefiles, and to make sure it works, another header
# and compilation test is done (this should also check whether we can compile
# against botan should neither -config scripts nor pkgconfig data exist).
#
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botan_config="yes"
AC_ARG_WITH([botan-config],
  AC_HELP_STRING([--with-botan-config=PATH],
    [specify the path to the botan-config script]),
    [botan_config="$withval"])
if test "${botan_config}" = "no" ; then
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    AC_MSG_ERROR([Need botan for libcryptolink])
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fi
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if test "${botan_config}" != "yes" ; then
    if test -x "${botan_config}" ; then
        if test -d "${botan_config}" ; then
            AC_MSG_ERROR([${botan_config} is a directory])
        else
            BOTAN_CONFIG="${botan_config}"
        fi
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    else
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        AC_MSG_ERROR([--with-botan-config should point to a botan-config program and not a directory (${botan_config})])
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    fi
else
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    BOTAN_CONFIG=""
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    # first try several possible names of the config script
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    # (botan-config-1.8 is there just in case, the official name change
    # came later)
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    BOTAN_CONFIG_VERSIONS="botan-config-1.10 botan-config-1.9 botan-config-1.8 botan-config"
    for botan_config in $BOTAN_CONFIG_VERSIONS; do
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        ACX_TRY_BOTAN_TOOL([$botan_config],,
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                           [ BOTAN_CONFIG="$botan_config"  ]
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                          )
        if test "$BOTAN_CONFIG" != "" ; then
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            break
        fi
    done
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    if test "$BOTAN_CONFIG" = "" ; then
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        AC_PATH_PROG([PKG_CONFIG], [pkg-config])
        if test "$PKG_CONFIG" != "" ; then
            # Ok so no script found, see if pkg-config knows of it.
            # Unfortunately, the botan.pc files also have their minor version
            # in their name, so we need to try them one by one
            BOTAN_VERSIONS="botan-1.10 botan-1.9 botan-1.8"
            for version in $BOTAN_VERSIONS; do
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                ACX_TRY_BOTAN_TOOL([pkg-config], ["$version --silence-errors"],
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                                   [ BOTAN_CONFIG="$PKG_CONFIG $version" ]
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                                  )
            if test "$BOTAN_CONFIG" != "" ; then
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                break
            fi
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            done
        fi
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    fi
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fi
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if test "x${BOTAN_CONFIG}" != "x"
then
    BOTAN_LIBS=`${BOTAN_CONFIG} --libs`
    BOTAN_INCLUDES=`${BOTAN_CONFIG} --cflags`

    # We expect botan-config --libs to contain -L<path_to_libbotan>, but
    # this is not always the case.  As a heuristics workaround we add
    # -L`botan-config --prefix/lib` in this case (if not present already).
    # Same for BOTAN_INCLUDES (but using include instead of lib) below.
    if [ ${BOTAN_CONFIG} --prefix >/dev/null 2>&1 ] ; then
        echo ${BOTAN_LIBS} | grep -- -L > /dev/null || \
            BOTAN_LIBS="-L`${BOTAN_CONFIG} --prefix`/lib ${BOTAN_LIBS}"
        echo ${BOTAN_INCLUDES} | grep -- -I > /dev/null || \
            BOTAN_INCLUDES="-I`${BOTAN_CONFIG} --prefix`/include ${BOTAN_INCLUDES}"
    fi
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fi
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dnl Determine the Botan version
AC_MSG_CHECKING([Botan version])
cat > conftest.cpp << EOF
#include <botan/version.h>
AUTOCONF_BOTAN_VERSION=BOTAN_VERSION_MAJOR . BOTAN_VERSION_MINOR . BOTAN_VERSION_PATCH
EOF

BOTAN_VERSION=`$CPP $CPPFLAGS $BOTAN_INCLUDES conftest.cpp | grep '^AUTOCONF_BOTAN_VERSION=' | $SED -e 's/^AUTOCONF_BOTAN_VERSION=//' -e 's/[[ 	]]//g' -e 's/"//g' 2> /dev/null`
if test -z "$BOTAN_VERSION"; then
  BOTAN_VERSION="unknown"
fi
$RM -f conftest.cpp
AC_MSG_RESULT([$BOTAN_VERSION])

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# botan-config script (and the way we call pkg-config) returns -L and -l
# as one string, but we need them in separate values
BOTAN_LDFLAGS=
BOTAN_NEWLIBS=
for flag in ${BOTAN_LIBS}; do
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    BOTAN_LDFLAGS="${BOTAN_LDFLAGS} `echo $flag | ${SED} -ne '/^\(\-L\)/p'`"
    BOTAN_LIBS="${BOTAN_LIBS} `echo $flag | ${SED} -ne '/^\(\-l\)/p'`"
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done

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# See python_rpath for some info on why we do this
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if test "x$ISC_RPATH_FLAG" != "x"; then
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    BOTAN_RPATH=
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    for flag in ${BOTAN_LIBS}; do
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            BOTAN_RPATH="${BOTAN_RPATH} `echo $flag | ${SED} -ne "s/^\(\-L\)/${ISC_RPATH_FLAG}/p"`"
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    done
AC_SUBST(BOTAN_RPATH)

# According to the libtool manual, it should be sufficient if we
# specify the "-R libdir" in our wrapper library of botan (no other
# programs will need libbotan directly); "libdir" should be added to
# the program's binary image.  But we've seen in our build environments
# that (some versions of?) libtool doesn't propagate -R as documented,
# and it caused a linker error at run time.  To work around this, we
# also add the rpath to the global LDFLAGS.
    LDFLAGS="$BOTAN_RPATH $LDFLAGS"
fi

AC_SUBST(BOTAN_LDFLAGS)
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AC_SUBST(BOTAN_LIBS)
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AC_SUBST(BOTAN_INCLUDES)
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# Even though chances are high we already performed a real compilation check
# in the search for the right (pkg)config data, we try again here, to
# be sure.
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CPPFLAGS_SAVED=$CPPFLAGS
CPPFLAGS="$BOTAN_INCLUDES $CPPFLAGS"
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LIBS_SAVED="$LIBS"
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LIBS="$LIBS $BOTAN_LIBS"
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# ac_header_preproc is an autoconf symbol (undocumented but stable) that
# is set if the pre-processor phase passes. Thus by adding a custom
# failure handler we can detect the difference between a header not existing
# (or not even passing the pre-processor phase) and a header file resulting
# in compilation failures.
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AC_CHECK_HEADERS([botan/botan.h],,[
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	if test "x$ac_header_preproc" = "xyes"; then
		AC_MSG_ERROR([
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botan/botan.h was found but is unusable. The most common cause of this problem
is attempting to use an updated C++ compiler with older C++ libraries, such as
the version of Botan that comes with your distribution. If you have updated
your C++ compiler we highly recommend that you use support libraries such as
Boost and Botan that were compiled with the same compiler version.])
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	else
		AC_MSG_ERROR([Missing required header files.])
	fi]
)
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AC_LINK_IFELSE(
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        [AC_LANG_PROGRAM([#include <botan/botan.h>
                          #include <botan/hash.h>
                         ],
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                         [using namespace Botan;
                          LibraryInitializer::initialize();
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                          HashFunction *h = get_hash("MD5");
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                         ])],
        [AC_MSG_RESULT([checking for Botan library... yes])],
        [AC_MSG_RESULT([checking for Botan library... no])
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         AC_MSG_ERROR([Needs Botan library 1.8 or higher. On some systems,
         the botan package has a few missing dependencies (libbz2 and
         libgmp), if libbotan has been installed and you see this error,
         try upgrading to a higher version of botan or installing libbz2
         and libgmp.])]
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)
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CPPFLAGS=$CPPFLAGS_SAVED
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LIBS=$LIBS_SAVED
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# Check for MySql.  The path to the mysql_config program is given with
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# the --with-mysql-config (default to /usr/bin/mysql-config).  By default,
# the software is not built with MySQL support enabled.
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mysql_config="no"
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AC_ARG_WITH([dhcp-mysql],
  AC_HELP_STRING([--with-dhcp-mysql=PATH],
    [path to the MySQL 'mysql_config' script (MySQL is used for the DHCP database)]),
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    [mysql_config="$withval"])

if test "${mysql_config}" = "yes" ; then
    MYSQL_CONFIG="/usr/bin/mysql_config"
elif test "${mysql_config}" != "no" ; then
    MYSQL_CONFIG="${withval}"
fi

if test "$MYSQL_CONFIG" != "" ; then
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    if test -d "$MYSQL_CONFIG" -o ! -x "$MYSQL_CONFIG" ; then
        AC_MSG_ERROR([--with-dhcp-mysql should point to a mysql_config program])
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    fi

    MYSQL_CPPFLAGS=`$MYSQL_CONFIG --cflags`
    MYSQL_LIBS=`$MYSQL_CONFIG --libs`
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    MYSQL_VERSION=`$MYSQL_CONFIG --version`
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    AC_SUBST(MYSQL_CPPFLAGS)
    AC_SUBST(MYSQL_LIBS)

    # Check that a simple program using MySQL functions can compile and link.
    CPPFLAGS_SAVED="$CPPFLAGS"
    LIBS_SAVED="$LIBS"

    CPPFLAGS="$MYSQL_CPPFLAGS $CPPFLAGS"
    LIBS="$MYSQL_LIBS $LIBS"

    AC_LINK_IFELSE(
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            [AC_LANG_PROGRAM([#include <mysql.h>],
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                             [MYSQL mysql_handle;
                              (void) mysql_init(&mysql_handle);
                             ])],
            [AC_MSG_RESULT([checking for MySQL headers and library... yes])],
            [AC_MSG_RESULT([checking for MySQL headers and library... no])
             AC_MSG_ERROR([Needs MySQL library])]
    )

    CPPFLAGS=$CPPFLAGS_SAVED
    LIBS=$LIBS_SAVED

    # Note that MYSQL is present in the config.h file
    AC_DEFINE([HAVE_MYSQL], [1], [MySQL is present])
fi

# ... and at the shell level, so Makefile.am can take action depending on this.
AM_CONDITIONAL(HAVE_MYSQL, test "$MYSQL_CONFIG" != "")

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# Check for log4cplus
log4cplus_path="yes"
AC_ARG_WITH([log4cplus],
  AC_HELP_STRING([--with-log4cplus=PATH],
    [specify exact directory of log4cplus library and headers]),
    [log4cplus_path="$withval"])
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if test "${log4cplus_path}" = "no" ; then
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    AC_MSG_ERROR([Need log4cplus])
elif test "${log4cplus_path}" != "yes" ; then
  LOG4CPLUS_INCLUDES="-I${log4cplus_path}/include"
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  LOG4CPLUS_LIBS="-L${log4cplus_path}/lib"
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else
# If not specified, try some common paths.
	log4cplusdirs="/usr/local /usr/pkg /opt /opt/local"
	for d in $log4cplusdirs
	do
		if test -f $d/include/log4cplus/logger.h; then
			LOG4CPLUS_INCLUDES="-I$d/include"
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			LOG4CPLUS_LIBS="-L$d/lib"
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			break
		fi
	done
fi

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LOG4CPLUS_LIBS="$LOG4CPLUS_LIBS -llog4cplus $MULTITHREADING_FLAG"
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AC_SUBST(LOG4CPLUS_LIBS)
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AC_SUBST(LOG4CPLUS_INCLUDES)

CPPFLAGS_SAVED=$CPPFLAGS
CPPFLAGS="$LOG4CPLUS_INCLUDES $CPPFLAGS"
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LIBS_SAVED="$LIBS"
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LIBS="$LOG4CPLUS_LIBS $LIBS"
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AC_CHECK_HEADERS([log4cplus/logger.h],,AC_MSG_ERROR([Missing required header files.]))
AC_LINK_IFELSE(
        [AC_LANG_PROGRAM([#include <log4cplus/logger.h>
                         ],
                         [using namespace log4cplus;
                          Logger logger = Logger::getInstance("main");
                         ])],
        [AC_MSG_RESULT([checking for log4cplus library... yes])],
        [AC_MSG_RESULT([checking for log4cplus library... no])
         AC_MSG_ERROR([Needs log4cplus library])]
)

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dnl Determine the log4cplus version, used mainly for config.report.
AC_MSG_CHECKING([log4cplus version])
cat > conftest.cpp << EOF
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#include <log4cplus/version.h>
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AUTOCONF_LOG4CPLUS_VERSION=LOG4CPLUS_VERSION_STR
EOF

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LOG4CPLUS_VERSION=`$CPP $CPPFLAGS conftest.cpp | grep '^AUTOCONF_LOG4CPLUS_VERSION=' | $SED -e 's/^AUTOCONF_LOG4CPLUS_VERSION=//' -e 's/[[ 	]]//g' -e 's/"//g' 2> /dev/null`
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if test -z "$LOG4CPLUS_VERSION"; then
  LOG4CPLUS_VERSION="unknown"
fi
$RM -f conftest.cpp
AC_MSG_RESULT([$LOG4CPLUS_VERSION])

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CPPFLAGS=$CPPFLAGS_SAVED
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LIBS=$LIBS_SAVED
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#
# Configure Boost header path
#
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AX_BOOST_FOR_BIND10
# Boost offset_ptr is required in one library and not optional right now, so
# we unconditionally fail here if it doesn't work.
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if test "$BOOST_OFFSET_PTR_WOULDFAIL" = "yes" -a "$werror_ok" = 1; then
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    AC_MSG_ERROR([Failed to compile a required header file.  Try upgrading Boost to 1.44 or higher (when using clang++) or specifying --without-werror.  See the ChangeLog entry for Trac no. 2147 for more details.])
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fi
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if test "$BOOST_STATIC_ASSERT_WOULDFAIL" = "yes" -a X"$werror_ok" = X1; then
    AC_MSG_ERROR([Failed to use Boost static assertions. Try upgrading Boost to 1.54 or higher (when using GCC 4.8) or specifying --without-werror.  See trac ticket no. 3039 for more details.])
fi

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# There's a known bug in FreeBSD ports for Boost that would trigger a false
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# warning in build with g++ and -Werror (we exclude clang++ explicitly to
# avoid unexpected false positives).
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if test "$BOOST_NUMERIC_CAST_WOULDFAIL" = "yes" -a X"$werror_ok" = X1 -a $CLANGPP = "no"; then
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    AC_MSG_ERROR([Failed to compile a required header file.  If you are using FreeBSD and Boost installed via ports, retry with specifying --without-werror.  See the ChangeLog entry for Trac no. 1991 for more details.])
fi

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build_experimental_resolver=no
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AC_ARG_ENABLE(experimental-resolver,
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  [AC_HELP_STRING([--enable-experimental-resolver],
  [enable building of the experimental resolver [default=no]])],
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  [build_experimental_resolver=$enableval])
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AM_CONDITIONAL([BUILD_EXPERIMENTAL_RESOLVER], [test "$build_experimental_resolver" = "yes"])
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if test "$build_experimental_resolver" = "yes"; then
   BUILD_EXPERIMENTAL_RESOLVER=yes
else
   BUILD_EXPERIMENTAL_RESOLVER=no
fi
AC_SUBST(BUILD_EXPERIMENTAL_RESOLVER)
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use_shared_memory=yes
AC_ARG_WITH(shared-memory,
    AC_HELP_STRING([--with-shared-memory],
    [Build with Boost shared memory support; for large scale authoritative DNS servers]),
    [use_shared_memory=$withval])
if test X$use_shared_memory = Xyes -a "$BOOST_MAPPED_FILE_WOULDFAIL" = "yes"; then
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    AC_MSG_ERROR([Boost shared memory does not compile on this system.  If you don't need it (most normal users won't) build without it by rerunning this script with --without-shared-memory; using a different compiler or a different version of Boost may also help.])
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fi
AM_CONDITIONAL([USE_SHARED_MEMORY], [test x$use_shared_memory = xyes])
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if test "x$use_shared_memory" = "xyes"; then
    AC_DEFINE(USE_SHARED_MEMORY, 1, [Define to 1 if shared memory support is enabled])
fi
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AC_SUBST(BOOST_MAPPED_FILE_CXXFLAG)

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if test "$BOOST_OFFSET_PTR_OLD" = "yes" -a "$use_shared_memory" = "yes" ; then
995
    AC_MSG_ERROR([You're trying to compile against boost older than 1.48 with
996 997
shared memory. Older versions of boost have a bug which causes segfaults in
offset_ptr implementation when compiled by GCC with optimisations enabled.
998
See ticket no. 3025 for details.
999 1000 1001 1002 1003 1004

Either update boost to newer version or use --without-shared-memory.
Note that most users likely don't need shared memory support.
])
fi

1005
# Add some default CPP flags needed for Boost, identified by the AX macro.
1006
CPPFLAGS="$CPPFLAGS $CPPFLAGS_BOOST_THREADCONF"
1007

1008 1009 1010 1011 1012 1013 1014
# I can't get some of the #include <asio.hpp> right without this
# TODO: find the real cause of asio/boost wanting pthreads
# (this currently only occurs for src/lib/cc/session_unittests)
PTHREAD_LDFLAGS=
AC_CHECK_LIB(pthread, pthread_create,[ PTHREAD_LDFLAGS=-lpthread ], [])
AC_SUBST(PTHREAD_LDFLAGS)
AC_SUBST(MULTITHREADING_FLAG)
1015

1016
#
1017
# Check availability of gtest, which will be used for unit tests.
1018
#
1019 1020 1021
GTEST_LDFLAGS=
GTEST_LDADD=
DISTCHECK_GTEST_CONFIGURE_FLAG=
1022
GTEST_VERSION="unknown"
1023

1024
if test "x$enable_gtest" = "xyes" ; then
1025

1026 1027
    DISTCHECK_GTEST_CONFIGURE_FLAG="--with-gtest=$gtest_path"

1028
    if test -n "$with_gtest_source" ; then
1029 1030 1031

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

1032
            AC_MSG_CHECKING([for gtest source])
1033
            # If not specified, try some common paths.
1034
            GTEST_SOURCE=
1035 1036 1037 1038 1039 1040 1041
            for d in /usr/src/gtest /usr/local /usr/pkg /opt /opt/local ; do
                if test -f $d/src/gtest-all.cc -a $d/src/gtest_main.cc; then
                    GTEST_SOURCE=$d
                    AC_MSG_RESULT([$GTEST_SOURCE])
                    break
                fi
            done
1042
            if test -z $GTEST_SOURCE ; then
1043
                AC_MSG_ERROR([no gtest source but it was selected])
1044
            fi
1045
         else
1046
            AC_CHECK_FILES([$GTEST_SOURCE/src/gtest-all.cc]
1047 1048
               [$GTEST_SOURCE/src/gtest_main.cc],
               [have_gtest_source=yes],
1049
               [AC_MSG_ERROR([no gtest source at $GTEST_SOURCE])])
1050
          fi
1051
          have_gtest_source=yes
1052
          GTEST_LDFLAGS="\$(top_builddir)/libgtest.a"
1053 1054
          DISTCHECK_GTEST_CONFIGURE_FLAG="--with-gtest-source=$GTEST_SOURCE"
          GTEST_INCLUDES="-I$GTEST_SOURCE -I$GTEST_SOURCE/include"
1055 1056 1057 1058 1059 1060 1061
          # See $GTEST_SOURCE/include/gtest/internal/gtest-port.h
          # about GTEST_HAS_PTHREAD.
          case "$host" in
            *-solaris*|*-linux*|*-hpux*)
                GTEST_LDADD="$GTEST_LDADD $PTHREAD_LDFLAGS"
                ;;
          esac
1062 1063
        fi

1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077
if test "$gtest_path" != "no" ; then
    if test "$gtest_path" != "yes"; then
        GTEST_PATHS=$gtest_path
        if test -x "${gtest_path}/bin/gtest-config" ; then
            GTEST_CONFIG="${gtest_path}/bin/gtest-config"
        fi
    else
        AC_PATH_PROG([GTEST_CONFIG], [gtest-config])
    fi
    if test -x "${GTEST_CONFIG}" ; then :
        # using cppflags instead of cxxflags
        GTEST_INCLUDES=`${GTEST_CONFIG} --cppflags`
        GTEST_LDFLAGS=`${GTEST_CONFIG} --ldflags`
        GTEST_LDADD=`${GTEST_CONFIG} --libs`
1078
        GTEST_VERSION=`${GTEST_CONFIG} --version`
1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143
        GTEST_FOUND="true"
    else
        AC_MSG_WARN([Unable to locate Google Test gtest-config.])
        if test -z "${GTEST_PATHS}" ; then
            GTEST_PATHS="/usr /usr/local"
        fi
        GTEST_FOUND="false"
    fi
    if test "${GTEST_FOUND}" != "true"; then
        GTEST_FOUND="false"
        for dir in $GTEST_PATHS; do
            if test -f "$dir/include/gtest/gtest.h"; then
                GTEST_INCLUDES="-I$dir/include"
                GTEST_LDFLAGS="-L$dir/lib"
                GTEST_LDADD="-lgtest"
                GTEST_FOUND="true"
                # There is no gtest-config script on this
                # system, which is supposed to inform us
                # whether we need pthreads as well (a
                # gtest compile-time option). So we still
                # need to test that manually.
                CPPFLAGS_SAVED="$CPPFLAGS"
                CPPFLAGS="$CPPFLAGS $GTEST_INCLUDES"
                LDFLAGS_SAVED="$LDFLAGS"
                LDFLAGS="$LDFLAGS $GTEST_LDFLAGS"
                LIBS_SAVED=$LIBS
                LIBS="$LIBS $GTEST_LDADD"
                AC_MSG_CHECKING([Checking whether gtest tests need pthreads])
                # First try to compile without pthreads
                AC_TRY_LINK([
                    #include <gtest/gtest.h>
                    ],[
                        int i = 0;
                        char* c = NULL;
                        ::testing::InitGoogleTest(&i, &c);
                        return (0);
                    ],
                    [ AC_MSG_RESULT(no) ],
                    [
                        LIBS="$SAVED_LIBS $GTEST_LDADD $PTHREAD_LDFLAGS"
                        # Now try to compile with pthreads
                        AC_TRY_LINK([
                            #include <gtest/gtest.h>
                            ],[
                                int i = 0;
                                char* c = NULL;
                                ::testing::InitGoogleTest(&i, &c);
                                return (0);
                            ],
                            [ AC_MSG_RESULT(yes)
                              GTEST_LDADD="$GTEST_LDADD $PTHREAD_LDFLAGS"
                            ],
                            # Apparently we can't compile it at all
                            [ AC_MSG_ERROR(unable to compile with gtest) ])
                ])
                CPPFLAGS=$CPPFLAGS_SAVED
                LDFLAGS=$LDFLAGS_SAVED
                LIBS=$LIBS_SAVED
                break
            fi
        done
    fi
    if test "${GTES