summaryrefslogtreecommitdiffstats
path: root/src/c-ares/configure.ac
diff options
context:
space:
mode:
Diffstat (limited to 'src/c-ares/configure.ac')
-rw-r--r--src/c-ares/configure.ac897
1 files changed, 897 insertions, 0 deletions
diff --git a/src/c-ares/configure.ac b/src/c-ares/configure.ac
new file mode 100644
index 000000000..d31b5968e
--- /dev/null
+++ b/src/c-ares/configure.ac
@@ -0,0 +1,897 @@
+AC_PREREQ(2.57)
+
+dnl Version not hardcoded here. Fetched later from ares_version.h
+AC_INIT([c-ares], [-],
+ [c-ares mailing list: http://cool.haxx.se/mailman/listinfo/c-ares])
+
+XC_OVR_ZZ50
+XC_OVR_ZZ60
+CARES_OVERRIDE_AUTOCONF
+
+AC_CONFIG_SRCDIR([ares_ipv6.h])
+AC_CONFIG_HEADERS([ares_config.h ares_build.h])
+AC_CONFIG_MACRO_DIR([m4])
+AM_MAINTAINER_MODE
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
+
+CARES_CHECK_OPTION_DEBUG
+CARES_CHECK_OPTION_OPTIMIZE
+CARES_CHECK_OPTION_WARNINGS
+CARES_CHECK_OPTION_WERROR
+CARES_CHECK_OPTION_CURLDEBUG
+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.
+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
+AC_SUBST([AR])
+
+AX_CODE_COVERAGE
+
+dnl Remove non-configure distributed ares_build.h
+if test -f ${srcdir}/ares_build.h; then
+ rm -f ${srcdir}/ares_build.h
+fi
+
+dnl
+dnl Detect the canonical host and target build environment
+dnl
+
+AC_CANONICAL_HOST
+dnl Get system canonical name
+AC_DEFINE_UNQUOTED(OS, "${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="$CFLAGS -i-dynamic"
+ fi
+ #
+fi
+
+CARES_CHECK_COMPILER_HALT_ON_ERROR
+CARES_CHECK_COMPILER_ARRAY_SIZE_NEGATIVE
+CARES_CHECK_COMPILER_PROTOTYPE_MISMATCH
+CARES_CHECK_COMPILER_SYMBOL_HIDING
+
+CARES_CHECK_CURLDEBUG
+AM_CONDITIONAL(CURLDEBUG, test x$want_curldebug = xyes)
+
+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-"$ac_cv_native_windows" in
+ X-yes)
+ CURL_CHECK_HEADER_WINSOCK
+ CURL_CHECK_HEADER_WINSOCK2
+ CURL_CHECK_HEADER_WS2TCPIP
+ ;;
+ *)
+ ac_cv_header_winsock_h="no"
+ ac_cv_header_winsock2_h="no"
+ ac_cv_header_ws2tcpip_h="no"
+ ;;
+esac
+
+dnl **********************************************************************
+dnl Checks for libraries.
+dnl **********************************************************************
+
+CARES_CHECK_LIB_XNET
+
+dnl gethostbyname without lib or in the nsl lib?
+AC_CHECK_FUNC(gethostbyname,
+ [HAVE_GETHOSTBYNAME="1"
+ ],
+ [ AC_CHECK_LIB(nsl, gethostbyname,
+ [HAVE_GETHOSTBYNAME="1"
+ LIBS="$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 "$HAVE_GETHOSTBYNAME" != "1"; then
+ AC_MSG_ERROR([couldn't find libraries for gethostbyname()])
+fi
+
+dnl resolv lib for iPhone
+AS_IF([test "x$host_vendor" = "xapple"], [
+ AC_MSG_CHECKING([for iPhone target])
+ AC_COMPILE_IFELSE([
+ AC_LANG_PROGRAM([[
+#include "TargetConditionals.h"
+ ]], [[
+#if TARGET_OS_IPHONE == 0
+#error Not an iPhone target
+#endif
+return 0;
+ ]])
+ ],[
+ AC_MSG_RESULT([yes])
+ 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])
+ ])
+ ],[
+ AC_MSG_RESULT([no])
+ ])
+])
+
+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 $LIBS"],
+ ,
+ -lnsl)
+fi
+ac_cv_func_strcasecmp="no"
+
+CARES_CHECK_LIBS_CONNECT
+
+dnl iOS 10?
+AS_IF([test "x$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,
+AC_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.
+AC_HEADER_STDC
+
+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 Checks for typedefs, structures, and compiler characteristics.
+AC_C_CONST
+AC_TYPE_SIZE_T
+AC_HEADER_TIME
+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, ,
+ AC_DEFINE(ssize_t, int, [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
+
+AC_TYPE_SIGNAL
+
+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 $func function.])
+ ],[
+ AC_MSG_RESULT([but still no])
+ ])
+])
+
+
+dnl Check if the getnameinfo function is available
+dnl and get the types of five of its arguments.
+CURL_CHECK_FUNC_GETNAMEINFO
+
+
+AC_C_BIGENDIAN(
+ [AC_DEFINE(ARES_BIG_ENDIAN, 1,
+ [define this if ares is built for a big endian system])],
+ ,
+ [AC_MSG_WARN([couldn't figure out endianess, assuming little endian!])]
+)
+
+dnl Check for user-specified random device
+AC_ARG_WITH(random,
+AC_HELP_STRING([--with-random=FILE],
+ [read randomness from FILE (default=/dev/urandom)]),
+ [ RANDOM_FILE="$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 "$cross_compiling" = "no"; then
+ AC_CHECK_FILE("/dev/urandom", [ RANDOM_FILE="/dev/urandom"] )
+ else
+ AC_MSG_WARN([cannot check for /dev/urandom while cross compiling; assuming none])
+ fi
+
+ ]
+)
+if test -n "$RANDOM_FILE" && test X"$RANDOM_FILE" != Xno ; then
+ AC_SUBST(RANDOM_FILE)
+ AC_DEFINE_UNQUOTED(RANDOM_FILE, "$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,
+ AC_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([$build_tests])
+
+if test "x$build_tests" = "xyes" ; then
+ AC_CONFIG_SUBDIRS([test])
+fi
+
+AC_CONFIG_FILES([Makefile libcares.pc])
+AC_OUTPUT
+XC_AMEND_DISTCLEAN(['.'])