AC_PREREQ([2.60])

AC_INIT([c-ares], [1.18.1],

[c-ares mailing list: http://lists.haxx.se/listinfo/c-ares])

CARES_VERSION_INFO="7:1:5"

dnl This flag accepts an argument of the form current[:revision[:age]]. So,

dnl passing -version-info 3:12:1 sets current to 3, revision to 12, and age to

dnl 1.

dnl

dnl If either revision or age are omitted, they default to 0. Also note that age

dnl must be less than or equal to the current interface number.

dnl

dnl Here are a set of rules to help you update your library version information:

dnl

dnl 1.Start with version information of 0:0:0 for each libtool library.

dnl

dnl 2.Update the version information only immediately before a public release of

dnl your software. More frequent updates are unnecessary, and only guarantee

dnl that the current interface number gets larger faster.

dnl

dnl 3.If the library source code has changed at all since the last update, then

dnl increment revision (c:r+1:a)

dnl

dnl 4.If any interfaces have been added, removed, or changed since the last

dnl update, increment current, and set revision to 0. (c+1:r=0:a)

dnl

dnl 5.If any interfaces have been added since the last public release, then

dnl increment age. (c:r:a+1)

dnl

dnl 6.If any interfaces have been removed since the last public release, then

dnl set age to 0. (c:r:a=0)

dnl

AC_SUBST([CARES_VERSION_INFO])

AC_CONFIG_SRCDIR([src/lib/ares_ipv6.h])

AC_CONFIG_HEADERS([src/lib/ares_config.h include/ares_build.h])

AC_CONFIG_MACRO_DIR([m4])

AM_MAINTAINER_MODE

m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

AX_REQUIRE_DEFINED([AX_CXX_COMPILE_STDCXX_11])

CARES_CHECK_OPTION_DEBUG

CARES_CHECK_OPTION_OPTIMIZE

CARES_CHECK_OPTION_WARNINGS

CARES_CHECK_OPTION_WERROR

CARES_CHECK_OPTION_SYMBOL_HIDING

CARES_CHECK_OPTION_EXPOSE_STATICS

XC_CHECK_PATH_SEPARATOR

dnl SED is mandatory for configure process and libtool.

dnl Set it now, allowing it to be changed later.

AC_PATH_PROG([SED], [sed], [not_found],

[$PATH:/usr/bin:/usr/local/bin])

if test -z "$SED" || test "$SED" = "not_found"; then

AC_MSG_ERROR([sed not found in PATH. Cannot continue without sed.])

fi

AC_SUBST([SED])

dnl GREP is mandatory for configure process and libtool.

dnl Set it now, allowing it to be changed later.

AC_PATH_PROG([GREP], [grep], [not_found],

[$PATH:/usr/bin:/usr/local/bin])

if test -z "$GREP" || test "$GREP" = "not_found"; then

AC_MSG_ERROR([grep not found in PATH. Cannot continue without grep.])

fi

AC_SUBST([GREP])

dnl EGREP is mandatory for configure process and libtool.

dnl Set it now, allowing it to be changed later.

if echo a | ($GREP -E '(a|b)') >/dev/null 2>&1; then

AC_MSG_CHECKING([for egrep])

EGREP="$GREP -E"

AC_MSG_RESULT([$EGREP])

else

AC_PATH_PROG([EGREP], [egrep], [not_found],

[$PATH:/usr/bin:/usr/local/bin])

fi

if test -z "$EGREP" || test "$EGREP" = "not_found"; then

AC_MSG_ERROR([egrep not found in PATH. Cannot continue without egrep.])

fi

AC_SUBST([EGREP])

dnl AR is mandatory for configure process and libtool.

dnl This is target dependent, so check it as a tool.

if test -z "$AR"; then

dnl allow it to be overridden

AC_PATH_TOOL([AR], [ar], [not_found],

[$PATH:/usr/bin:/usr/local/bin])

if test -z "$AR" || test "$AR" = "not_found"; then

AC_MSG_ERROR([ar not found in PATH. Cannot continue without ar.])

fi

fi

AC_SUBST([AR])

AX_CODE_COVERAGE

dnl

dnl Detect the canonical host and target build environment

dnl

AC_CANONICAL_HOST

dnl Get system canonical name

AC_DEFINE_UNQUOTED(OS, "${host}", [cpu-machine-OS])

XC_CHECK_PROG_CC

AX_CXX_COMPILE_STDCXX_11([noext],[optional])

XC_AUTOMAKE

dnl This defines _ALL_SOURCE for AIX

CARES_CHECK_AIX_ALL_SOURCE

dnl Our configure and build reentrant settings

CARES_CONFIGURE_THREAD_SAFE

CARES_CONFIGURE_REENTRANT

dnl check for how to do large files

AC_SYS_LARGEFILE

case $host_os in

solaris*)

AC_DEFINE(ETC_INET, 1, [if a /etc/inet dir is being used])

;;

esac

XC_LIBTOOL

#

# Automake conditionals based on libtool related checks

#

AM_CONDITIONAL([CARES_LT_SHLIB_USE_VERSION_INFO],

[test "x$xc_lt_shlib_use_version_info" = 'xyes'])

AM_CONDITIONAL([CARES_LT_SHLIB_USE_NO_UNDEFINED],

[test "x$xc_lt_shlib_use_no_undefined" = 'xyes'])

AM_CONDITIONAL([CARES_LT_SHLIB_USE_MIMPURE_TEXT],

[test "x$xc_lt_shlib_use_mimpure_text" = 'xyes'])

#

# Due to libtool and automake machinery limitations of not allowing

# specifying separate CPPFLAGS or CFLAGS when compiling objects for

# inclusion of these in shared or static libraries, we are forced to

# build using separate configure runs for shared and static libraries

# on systems where different CPPFLAGS or CFLAGS are mandatory in order

# to compile objects for each kind of library. Notice that relying on

# the '-DPIC' CFLAG that libtool provides is not valid given that the

# user might for example choose to build static libraries with PIC.

#

#

# Make our Makefile.am files use the staticlib CPPFLAG only when strictly

# targeting a static library and not building its shared counterpart.

#

AM_CONDITIONAL([USE_CPPFLAG_CARES_STATICLIB],

[test "x$xc_lt_build_static_only" = 'xyes'])

#

# Make staticlib CPPFLAG variable and its definition visible in output

# files unconditionally, providing an empty definition unless strictly

# targeting a static library and not building its shared counterpart.

#

CPPFLAG_CARES_STATICLIB=

if test "x$xc_lt_build_static_only" = 'xyes'; then

CPPFLAG_CARES_STATICLIB='-DCARES_STATICLIB'

fi

AC_SUBST([CPPFLAG_CARES_STATICLIB])

dnl **********************************************************************

dnl platform/compiler/architecture specific checks/flags

dnl **********************************************************************

CARES_CHECK_COMPILER

CARES_SET_COMPILER_BASIC_OPTS

CARES_SET_COMPILER_DEBUG_OPTS

CARES_SET_COMPILER_OPTIMIZE_OPTS

CARES_SET_COMPILER_WARNING_OPTS

if test "$compiler_id" = "INTEL_UNIX_C"; then

#

if test "$compiler_num" -ge "1000"; then

dnl icc 10.X or later

CFLAGS="$CFLAGS -shared-intel"

elif test "$compiler_num" -ge "900"; then

dnl icc 9.X specific

CFLAGS="$CFLAGS -i-dynamic"

fi

#

fi

CARES_CHECK_COMPILER_HALT_ON_ERROR

CARES_CHECK_COMPILER_ARRAY_SIZE_NEGATIVE

CARES_CHECK_COMPILER_PROTOTYPE_MISMATCH

CARES_CHECK_COMPILER_SYMBOL_HIDING

dnl **********************************************************************

dnl Compilation based checks should not be done before this point.

dnl **********************************************************************

dnl **********************************************************************

dnl Make sure that our checks for headers windows.h winsock.h winsock2.h

dnl and ws2tcpip.h take precedence over any other further checks which

dnl could be done later using AC_CHECK_HEADER or AC_CHECK_HEADERS for

dnl this specific header files. And do them before its results are used.

dnl **********************************************************************

CURL_CHECK_HEADER_WINDOWS

CURL_CHECK_NATIVE_WINDOWS

case X-"$ac_cv_native_windows" in

X-yes)

CURL_CHECK_HEADER_WINSOCK

CURL_CHECK_HEADER_WINSOCK2

CURL_CHECK_HEADER_WS2TCPIP

CPPFLAGS="$CPPFLAGS -D_WIN32_WINNT=0x0600"

;;

*)

ac_cv_header_winsock_h="no"

ac_cv_header_winsock2_h="no"

ac_cv_header_ws2tcpip_h="no"

;;

esac

dnl **********************************************************************

dnl Checks for libraries.

dnl **********************************************************************

CARES_CHECK_LIB_XNET

dnl gethostbyname without lib or in the nsl lib?

AC_CHECK_FUNC(gethostbyname,

[HAVE_GETHOSTBYNAME="1"

],

[ AC_CHECK_LIB(nsl, gethostbyname,

[HAVE_GETHOSTBYNAME="1"

LIBS="$LIBS -lnsl"

])

])

if test "$HAVE_GETHOSTBYNAME" != "1"

then

dnl gethostbyname in the socket lib?

AC_CHECK_LIB(socket, gethostbyname,

[HAVE_GETHOSTBYNAME="1"

LIBS="$LIBS -lsocket"

])

fi

dnl At least one system has been identified to require BOTH nsl and socket

dnl libs at the same time to link properly.

if test "$HAVE_GETHOSTBYNAME" != "1"

then

AC_MSG_CHECKING([for gethostbyname with both nsl and socket libs])

my_ac_save_LIBS=$LIBS

LIBS="-lnsl -lsocket $LIBS"

AC_LINK_IFELSE([

AC_LANG_PROGRAM([[

]],[[

gethostbyname();

]])

],[

AC_MSG_RESULT([yes])

HAVE_GETHOSTBYNAME="1"

],[

AC_MSG_RESULT([no])

LIBS=$my_ac_save_LIBS

])

fi

if test "$HAVE_GETHOSTBYNAME" != "1"

then

dnl This is for winsock systems

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

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

case $host in

*-*-mingw32ce*)

winsock_LIB="-lwinsock"

;;

*)

winsock_LIB="-lwsock32"

;;

esac

fi

if test "$ac_cv_header_winsock2_h" = "yes"; then

winsock_LIB="-lws2_32"

fi

if test ! -z "$winsock_LIB"; then

my_ac_save_LIBS=$LIBS

LIBS="$winsock_LIB $LIBS"

AC_MSG_CHECKING([for gethostbyname in $winsock_LIB])

AC_LINK_IFELSE([

AC_LANG_PROGRAM([[

#ifdef HAVE_WINDOWS_H

#ifndef WIN32_LEAN_AND_MEAN

#define WIN32_LEAN_AND_MEAN

#endif

#include <windows.h>

#ifdef HAVE_WINSOCK2_H

#include <winsock2.h>

#else

#ifdef HAVE_WINSOCK_H

#include <winsock.h>

#endif

#endif

#endif

]],[[

gethostbyname("www.dummysite.com");

]])

],[

AC_MSG_RESULT([yes])

HAVE_GETHOSTBYNAME="1"

],[

AC_MSG_RESULT([no])

winsock_LIB=""

LIBS=$my_ac_save_LIBS

])

fi

fi

fi

if test "$HAVE_GETHOSTBYNAME" != "1"

then

dnl This is for Minix 3.1

AC_MSG_CHECKING([for gethostbyname for Minix 3])

AC_LINK_IFELSE([

AC_LANG_PROGRAM([[

/* Older Minix versions may need <net/gen/netdb.h> here instead */

#include <netdb.h>

]],[[

gethostbyname("www.dummysite.com");

]])

],[

AC_MSG_RESULT([yes])

HAVE_GETHOSTBYNAME="1"

],[

AC_MSG_RESULT([no])

])

fi

if test "$HAVE_GETHOSTBYNAME" != "1"

then

dnl This is for eCos with a stubbed DNS implementation

AC_MSG_CHECKING([for gethostbyname for eCos])

AC_LINK_IFELSE([

AC_LANG_PROGRAM([[

#include <stdio.h>

#include <netdb.h>

]],[[

gethostbyname("www.dummysite.com");

]])

],[

AC_MSG_RESULT([yes])

HAVE_GETHOSTBYNAME="1"

],[

AC_MSG_RESULT([no])

])

fi

if test "$HAVE_GETHOSTBYNAME" != "1"

then

dnl gethostbyname in the net lib - for BeOS

AC_CHECK_LIB(net, gethostbyname,

[HAVE_GETHOSTBYNAME="1"

LIBS="$LIBS -lnet"

])

fi

if test "$HAVE_GETHOSTBYNAME" != "1"; then

AC_MSG_ERROR([couldn't find libraries for gethostbyname()])

fi

dnl resolv lib for Apple (MacOS and iOS)

AS_IF([test "x$host_vendor" = "xapple"], [

AC_SEARCH_LIBS([res_servicename], [resolv], [

AC_DEFINE([CARES_USE_LIBRESOLV], [1], [Use resolver library to configure cares])

], [

AC_MSG_ERROR([Unable to find libresolv which is required for iPhone targets])

])

])

dnl resolv lib for z/OS

AS_IF([test "x$host_vendor" = "xibm" -a "x$host_os" = "xopenedition" ], [

AC_SEARCH_LIBS([res_init], [resolv], [

AC_DEFINE([CARES_USE_LIBRESOLV], [1], [Use resolver library to configure cares])

], [

AC_MSG_ERROR([Unable to find libresolv which is required for z/OS])

])

])

dnl resolve lib?

AC_CHECK_FUNC(strcasecmp, , [ AC_CHECK_LIB(resolve, strcasecmp) ])

if test "$ac_cv_lib_resolve_strcasecmp" = "$ac_cv_func_strcasecmp"; then

AC_CHECK_LIB(resolve, strcasecmp,

[LIBS="-lresolve $LIBS"],

,

-lnsl)

fi

ac_cv_func_strcasecmp="no"

dnl Windows builds require linking to iphlpapi

if test "$ac_cv_header_winsock2_h" = "yes"; then

LIBS="$LIBS -liphlpapi"

fi

CARES_CHECK_LIBS_CONNECT

dnl iOS 10?

AS_IF([test "x$host_vendor" = "xapple"], [

AC_MSG_CHECKING([for iOS minimum version 10 or later])

AC_COMPILE_IFELSE([

AC_LANG_PROGRAM([[

#include <stdio.h>

#include <TargetConditionals.h>

]], [[

#if TARGET_OS_IPHONE == 0 || __IPHONE_OS_VERSION_MIN_REQUIRED < 100000

#error Not iOS 10 or later

#endif

return 0;

]])

],[

AC_MSG_RESULT([yes])

ac_cv_ios_10="yes"

],[

AC_MSG_RESULT([no])

])

])

dnl macOS 10.12?

AS_IF([test "x$host_vendor" = "xapple"], [

AC_MSG_CHECKING([for macOS minimum version 10.12 or later])

AC_COMPILE_IFELSE([

AC_LANG_PROGRAM([[

#include <stdio.h>

#include <TargetConditionals.h>

]], [[

#ifndef MAC_OS_X_VERSION_10_12

# define MAC_OS_X_VERSION_10_12 101200

#endif

#if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12

#error Not macOS 10.12 or later

#endif

return 0;

]])

],[

AC_MSG_RESULT([yes])

ac_cv_macos_10_12="yes"

],[

AC_MSG_RESULT([no])

])

])

dnl **********************************************************************

dnl In case that function clock_gettime with monotonic timer is available,

dnl check for additional required libraries.

dnl **********************************************************************

dnl Xcode 8 bug: iOS when targeting less than 10, or macOS when targeting less than 10.12 will

dnl say clock_gettime exists, it is a weak symbol that only exists in iOS 10 or macOS 10.12 and will

dnl cause a crash at runtime when running on older versions. Skip finding CLOCK_MONOTONIC on older

dnl Apple OS's.

if test "x$host_vendor" != "xapple" || test "x$ac_cv_ios_10" = "xyes" || test "x$ac_cv_macos_10_12" = "xyes"; then

CURL_CHECK_LIBS_CLOCK_GETTIME_MONOTONIC

fi

AC_MSG_CHECKING([whether to use libgcc])

AC_ARG_ENABLE(libgcc,

AS_HELP_STRING([--enable-libgcc],[use libgcc when linking]),

[ case "$enableval" in

yes)

LIBS="$LIBS -lgcc"

AC_MSG_RESULT(yes)

;;

*) AC_MSG_RESULT(no)

;;

esac ],

AC_MSG_RESULT(no)

)

dnl Let's hope this split URL remains working:

dnl http://publibn.boulder.ibm.com/doc_link/en_US/a_doc_lib/aixprggd/ \

dnl genprogc/thread_quick_ref.htm

dnl **********************************************************************

dnl Back to "normal" configuring

dnl **********************************************************************

dnl Checks for header files.

STDC_HEADERS

AC_PROG_EGREP

CURL_CHECK_HEADER_MALLOC

CURL_CHECK_HEADER_MEMORY

dnl check for a few basic system headers we need

AC_CHECK_HEADERS(

sys/types.h \

sys/time.h \

sys/select.h \

sys/socket.h \

sys/ioctl.h \

sys/param.h \

sys/uio.h \

assert.h \

netdb.h \

netinet/in.h \

netinet/tcp.h \

net/if.h \

errno.h \

socket.h \

strings.h \

stdbool.h \

time.h \

limits.h \

arpa/nameser.h \

arpa/nameser_compat.h \

arpa/inet.h,

dnl to do if not found

[],

dnl to do if found

[],

dnl default includes

[

#ifdef HAVE_SYS_TYPES_H

#include <sys/types.h>

#endif

#ifdef HAVE_SYS_TIME_H

#include <sys/time.h>

#endif

dnl We do this default-include simply to make sure that the nameser_compat.h

dnl header *REALLY* can be include after the new nameser.h. It seems AIX 5.1

dnl (and others?) is not designed to allow this.

#ifdef HAVE_ARPA_NAMESER_H

#include <arpa/nameser.h>

#endif

dnl *Sigh* these are needed in order for net/if.h to get properly detected.

#ifdef HAVE_SYS_SOCKET_H

#include <sys/socket.h>

#endif

#ifdef HAVE_NETINET_IN_H

#include <netinet/in.h>

#endif

]

)

dnl Test and set CARES_HAVE_ARPA_NAMESER_H / CARES_HAVE_ARPA_NAMESER_COMPAT_H

AC_CHECK_DECL([HAVE_ARPA_NAMESER_H],

[

CARES_DEFINE_UNQUOTED([CARES_HAVE_ARPA_NAMESER_H])

],

[]

)

AC_CHECK_DECL([HAVE_ARPA_NAMESER_COMPAT_H],

[

CARES_DEFINE_UNQUOTED([CARES_HAVE_ARPA_NAMESER_COMPAT_H])

],

[]

)

dnl Checks for typedefs, structures, and compiler characteristics.

AC_C_CONST

AC_TYPE_SIZE_T

m4_warn([obsolete],

[Update your code to rely only on HAVE_SYS_TIME_H,

then remove this warning and the obsolete code below it.

All current systems provide time.h; it need not be checked for.

Not all systems provide sys/time.h, but those that do, all allow

you to include it and time.h simultaneously.])dnl

AC_CHECK_HEADERS_ONCE([sys/time.h])

# Obsolete code to be removed.

if test $ac_cv_header_sys_time_h = yes; then

AC_DEFINE([TIME_WITH_SYS_TIME],[1],[Define to 1 if you can safely include both <sys/time.h>

and <time.h>. This macro is obsolete.])

fi

# End of obsolete code.

CURL_CHECK_STRUCT_TIMEVAL

AC_CHECK_TYPE(long long,

[AC_DEFINE(HAVE_LONGLONG, 1,

[Define to 1 if the compiler supports the 'long long' data type.])]

longlong="yes"

)

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

AC_MSG_CHECKING([if numberLL works])

AC_COMPILE_IFELSE([

AC_LANG_PROGRAM([[

]],[[

long long val = 1000LL;

]])

],[

AC_MSG_RESULT([yes])

AC_DEFINE(HAVE_LL, 1, [if your compiler supports LL])

],[

AC_MSG_RESULT([no])

])

fi

# check for ssize_t

AC_CHECK_TYPE(ssize_t, [ CARES_TYPEOF_ARES_SSIZE_T=ssize_t ],

[ CARES_TYPEOF_ARES_SSIZE_T=int ])

AC_DEFINE_UNQUOTED([CARES_TYPEOF_ARES_SSIZE_T], ${CARES_TYPEOF_ARES_SSIZE_T},

[the signed version of size_t])

# check for bool type

AC_CHECK_TYPE([bool],[

AC_DEFINE(HAVE_BOOL_T, 1,

[Define to 1 if bool is an available type.])

], ,[

#ifdef HAVE_SYS_TYPES_H

#include <sys/types.h>

#endif

#ifdef HAVE_STDBOOL_H

#include <stdbool.h>

#endif

])

CARES_CONFIGURE_ARES_SOCKLEN_T

TYPE_IN_ADDR_T

TYPE_SOCKADDR_STORAGE

TYPE_SIG_ATOMIC_T

m4_warn([obsolete],

[your code may safely assume C89 semantics that RETSIGTYPE is void.

Remove this warning and the `AC_CACHE_CHECK' when you adjust the code.])dnl

AC_CACHE_CHECK([return type of signal handlers],[ac_cv_type_signal],[AC_COMPILE_IFELSE(

[AC_LANG_PROGRAM([#include <sys/types.h>

#include <signal.h>

],

[return *(signal (0, 0)) (0) == 1;])],

[ac_cv_type_signal=int],

[ac_cv_type_signal=void])])

AC_DEFINE_UNQUOTED([RETSIGTYPE],[$ac_cv_type_signal],[Define as the return type of signal handlers

(`int' or `void').])

CURL_CHECK_FUNC_RECV

CURL_CHECK_FUNC_RECVFROM

CURL_CHECK_FUNC_SEND

CURL_CHECK_MSG_NOSIGNAL

CARES_CHECK_FUNC_CLOSESOCKET

CARES_CHECK_FUNC_CLOSESOCKET_CAMEL

CARES_CHECK_FUNC_CONNECT

CARES_CHECK_FUNC_FCNTL

CARES_CHECK_FUNC_FREEADDRINFO

CARES_CHECK_FUNC_GETADDRINFO

CARES_CHECK_FUNC_GETENV

CARES_CHECK_FUNC_GETHOSTBYADDR

CARES_CHECK_FUNC_GETHOSTBYNAME

CARES_CHECK_FUNC_GETHOSTNAME

CARES_CHECK_FUNC_GETSERVBYPORT_R

CARES_CHECK_FUNC_INET_NET_PTON

CARES_CHECK_FUNC_INET_NTOP

CARES_CHECK_FUNC_INET_PTON

CARES_CHECK_FUNC_IOCTL

CARES_CHECK_FUNC_IOCTLSOCKET

CARES_CHECK_FUNC_IOCTLSOCKET_CAMEL

CARES_CHECK_FUNC_SETSOCKOPT

CARES_CHECK_FUNC_SOCKET

CARES_CHECK_FUNC_STRCASECMP

CARES_CHECK_FUNC_STRCMPI

CARES_CHECK_FUNC_STRDUP

CARES_CHECK_FUNC_STRICMP

CARES_CHECK_FUNC_STRNCASECMP

CARES_CHECK_FUNC_STRNCMPI

CARES_CHECK_FUNC_STRNICMP

CARES_CHECK_FUNC_WRITEV

dnl check for AF_INET6

CARES_CHECK_CONSTANT(

[

#undef inline

#ifdef HAVE_WINDOWS_H

#ifndef WIN32_LEAN_AND_MEAN

#define WIN32_LEAN_AND_MEAN

#endif

#include <windows.h>

#ifdef HAVE_WINSOCK2_H

#include <winsock2.h>

#endif

#else

#ifdef HAVE_SYS_TYPES_H

#include <sys/types.h>

#endif

#ifdef HAVE_SYS_SOCKET_H

#include <sys/socket.h>

#endif

#endif

], [PF_INET6],

AC_DEFINE_UNQUOTED(HAVE_PF_INET6,1,[Define to 1 if you have PF_INET6.])

)

dnl check for PF_INET6

CARES_CHECK_CONSTANT(

[

#undef inline

#ifdef HAVE_WINDOWS_H

#ifndef WIN32_LEAN_AND_MEAN

#define WIN32_LEAN_AND_MEAN

#endif

#include <windows.h>

#ifdef HAVE_WINSOCK2_H

#include <winsock2.h>

#endif

#else

#ifdef HAVE_SYS_TYPES_H

#include <sys/types.h>

#endif

#ifdef HAVE_SYS_SOCKET_H

#include <sys/socket.h>

#endif

#endif

], [AF_INET6],

AC_DEFINE_UNQUOTED(HAVE_AF_INET6,1,[Define to 1 if you have AF_INET6.])

)

dnl check for the in6_addr structure

CARES_CHECK_STRUCT(

[

#undef inline

#ifdef HAVE_WINDOWS_H

#ifndef WIN32_LEAN_AND_MEAN

#define WIN32_LEAN_AND_MEAN

#endif

#include <windows.h>

#ifdef HAVE_WINSOCK2_H

#include <winsock2.h>

#ifdef HAVE_WS2TCPIP_H

#include <ws2tcpip.h>

#endif

#endif

#else

#ifdef HAVE_SYS_TYPES_H

#include <sys/types.h>

#endif

#ifdef HAVE_NETINET_IN_H

#include <netinet/in.h>

#endif

#endif

], [in6_addr],

AC_DEFINE_UNQUOTED(HAVE_STRUCT_IN6_ADDR,1,[Define to 1 if you have struct in6_addr.])

)

dnl check for the sockaddr_in6 structure

CARES_CHECK_STRUCT(

[

#undef inline

#ifdef HAVE_WINDOWS_H

#ifndef WIN32_LEAN_AND_MEAN

#define WIN32_LEAN_AND_MEAN

#endif

#include <windows.h>

#ifdef HAVE_WINSOCK2_H

#include <winsock2.h>

#ifdef HAVE_WS2TCPIP_H

#include <ws2tcpip.h>

#endif

#endif

#else

#ifdef HAVE_SYS_TYPES_H

#include <sys/types.h>

#endif

#ifdef HAVE_NETINET_IN_H

#include <netinet/in.h>

#endif

#endif

], [sockaddr_in6],

AC_DEFINE_UNQUOTED(HAVE_STRUCT_SOCKADDR_IN6,1,

[Define to 1 if you have struct sockaddr_in6.]) ac_have_sockaddr_in6=yes

)

AC_CHECK_MEMBER(struct sockaddr_in6.sin6_scope_id,

AC_DEFINE_UNQUOTED(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID,1,

[Define to 1 if your struct sockaddr_in6 has sin6_scope_id.])

, ,

[

#undef inline

#ifdef HAVE_WINDOWS_H

#ifndef WIN32_LEAN_AND_MEAN

#define WIN32_LEAN_AND_MEAN

#endif

#include <windows.h>

#ifdef HAVE_WINSOCK2_H

#include <winsock2.h>

#ifdef HAVE_WS2TCPIP_H

#include <ws2tcpip.h>

#endif

#endif

#else

#ifdef HAVE_SYS_TYPES_H

#include <sys/types.h>

#endif

#ifdef HAVE_NETINET_IN_H

#include <netinet/in.h>

#endif

#endif

])

dnl check for the addrinfo structure

AC_CHECK_MEMBER(struct addrinfo.ai_flags,

AC_DEFINE_UNQUOTED(HAVE_STRUCT_ADDRINFO,1,

[Define to 1 if you have struct addrinfo.]),,

[

#undef inline

#ifdef HAVE_WINDOWS_H

#ifndef WIN32_LEAN_AND_MEAN

#define WIN32_LEAN_AND_MEAN

#endif

#include <windows.h>

#ifdef HAVE_WINSOCK2_H

#include <winsock2.h>

#ifdef HAVE_WS2TCPIP_H

#include <ws2tcpip.h>

#endif

#endif

#else

#ifdef HAVE_SYS_TYPES_H

#include <sys/types.h>

#endif

#ifdef HAVE_NETINET_IN_H

#include <netinet/in.h>

#endif

#ifdef HAVE_SYS_SOCKET_H

#include <sys/socket.h>

#endif

#ifdef HAVE_NETDB_H

#include <netdb.h>

#endif

#endif

]

)

AC_CHECK_FUNCS([bitncmp \

gettimeofday \

if_indextoname

],[

],[

func="$ac_func"

AC_MSG_CHECKING([deeper for $func])

AC_LINK_IFELSE([

AC_LANG_PROGRAM([[

]],[[

$func ();

]])

],[

AC_MSG_RESULT([yes])

eval "ac_cv_func_$func=yes"

AC_DEFINE_UNQUOTED(XC_SH_TR_CPP([HAVE_$func]), [1],

[Define to 1 if you have the $func function.])

],[

AC_MSG_RESULT([but still no])

])

])

dnl Android. Some variants like arm64 may no longer have __system_property_get

dnl in libc, but they are defined in the headers. Perform a link check.

AC_CHECK_FUNC([__system_property_get], [

AC_DEFINE([HAVE___SYSTEM_PROPERTY_GET], [1], [Define if __system_property_get exists.])

])

dnl Check if the getnameinfo function is available

dnl and get the types of five of its arguments.

CURL_CHECK_FUNC_GETNAMEINFO

AC_C_BIGENDIAN(

[AC_DEFINE(ARES_BIG_ENDIAN, 1,

[define this if ares is built for a big endian system])],

,

[AC_MSG_WARN([couldn't figure out endianess, assuming little endian!])]

)

dnl Check for user-specified random device

AC_ARG_WITH(random,

AS_HELP_STRING([--with-random=FILE],

[read randomness from FILE (default=/dev/urandom)]),

[ CARES_RANDOM_FILE="$withval" ],

[

dnl Check for random device. If we're cross compiling, we can't

dnl check, and it's better to assume it doesn't exist than it is

dnl to fail on AC_CHECK_FILE or later.

if test "$cross_compiling" = "no"; then

AC_CHECK_FILE("/dev/urandom", [ CARES_RANDOM_FILE="/dev/urandom"] )

else

AC_MSG_WARN([cannot check for /dev/urandom while cross compiling; assuming none])

fi

]

)

if test -n "$CARES_RANDOM_FILE" && test X"$CARES_RANDOM_FILE" != Xno ; then

AC_SUBST(CARES_RANDOM_FILE)

AC_DEFINE_UNQUOTED(CARES_RANDOM_FILE, "$CARES_RANDOM_FILE",

[a suitable file/device to read random data from])

fi

CARES_CHECK_OPTION_NONBLOCKING

CARES_CHECK_NONBLOCKING_SOCKET

CARES_CONFIGURE_SYMBOL_HIDING

CARES_PRIVATE_LIBS="$LIBS"

AC_SUBST(CARES_PRIVATE_LIBS)

CARES_CFLAG_EXTRAS=""

if test X"$want_werror" = Xyes; then

CARES_CFLAG_EXTRAS="-Werror"

fi

AC_SUBST(CARES_CFLAG_EXTRAS)

dnl squeeze whitespace out of some variables

squeeze CFLAGS

squeeze CPPFLAGS

squeeze DEFS

squeeze LDFLAGS

squeeze LIBS

squeeze CARES_PRIVATE_LIBS

XC_CHECK_BUILD_FLAGS

AC_MSG_CHECKING([whether to build tests])

AC_ARG_ENABLE(tests,

AS_HELP_STRING([--enable-tests], [build test suite]),

[ build_tests="$enableval" ],

[ if test "x$HAVE_CXX11" = "x1" && test "x$cross_compiling" = "xno" ; then

build_tests="yes"

else

build_tests="no"

fi

]

)

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

if test "x$HAVE_CXX11" = "0" ; then

AC_MSG_ERROR([*** Building tests requires a CXX11 compiler])

fi

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

AC_MSG_ERROR([*** Tests not supported when cross compiling])

fi

fi

AC_MSG_RESULT([$build_tests])

BUILD_SUBDIRS="include src docs"

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

AC_CONFIG_SUBDIRS([test])

BUILD_SUBDIRS="${BUILD_SUBDIRS} test"

fi

AC_SUBST(BUILD_SUBDIRS)

AC_CONFIG_FILES([Makefile \

include/Makefile \

src/Makefile \

src/lib/Makefile \

src/tools/Makefile \

docs/Makefile \

libcares.pc ])

AC_OUTPUT

XC_AMEND_DISTCLEAN(['.'])