CMAKE_MINIMUM_REQUIRED ( VERSION 2.8.12 )
# Fix for CMake policy warning when building with CMake >= 3.0.
# TODO: remove this fix once minimum version is updated to 3.0 or newer.
IF ( NOT CMAKE_VERSION VERSION_LESS 3.0 )
CMAKE_POLICY ( SET CMP0048 NEW )
ENDIF ( )
INCLUDE ( CheckIncludeFiles )
INCLUDE ( CheckTypeSize )
INCLUDE ( CheckFunctionExists )
INCLUDE ( CheckSymbolExists )
INCLUDE ( CheckCSourceCompiles )
INCLUDE ( CheckStructHasMember )
INCLUDE ( CheckLibraryExists )
INCLUDE ( GNUInstallDirs )
PROJECT ( c-ares C )
# This is for libtool compatibility, and specified in a form that is easily
# translatable from libtool (even if the actual form doesn't make sense).
# For instance, in an autotools project, in Makefile.am there is a line that
# contains something like:
# -version-info 4:0:2
# This breaks down into sections of current:revision:age
# This then generates a version of "(current-age).age.revision" with an
# interface version of "(current-age)"
# For example, a version of 4:0:2 would generate output such as:
# libname.so -> libname.so.2
# libname.so.2 -> libname.so.2.2.0
SET ( CARES_LIB_VERSIONINFO "4:0:2" )
OPTION ( CARES_STATIC "Build as a static library" OFF )
OPTION ( CARES_SHARED "Build as a shared library" ON )
OPTION ( CARES_INSTALL "Create installation targets (chain builders may want to disable this)" ON )
OPTION ( CARES_STATIC_PIC "Build the static library as PIC (position independent)" OFF )
# allow linking against the static runtime library in msvc
IF ( MSVC )
OPTION ( CARES_MSVC_STATIC_RUNTIME "Link against the static runtime library" OFF )
IF ( CARES_MSVC_STATIC_RUNTIME )
# CMAKE_CONFIGURATION_TYPES is empty on non-IDE generators (Ninja, NMake)
# and that's why we also use CMAKE_BUILD_TYPE to cover for those generators.
# For IDE generators, CMAKE_BUILD_TYPE is usually empty
FOREACH ( config_type ${ CMAKE_CONFIGURATION_TYPES } ${ CMAKE_BUILD_TYPE } )
STRING ( TOUPPER ${ config_type } upper_config_type )
SET ( flag_var "CMAKE_C_FLAGS_${upper_config_type}" )
IF ( ${ flag_var } MATCHES "/MD" )
STRING ( REGEX REPLACE "/MD" "/MT" ${ flag_var } "${${flag_var}}" )
ENDIF ( )
ENDFOREACH ( )
# clean up
SET ( upper_config_type )
SET ( config_type )
SET ( flag_var )
ENDIF ( )
ENDIF ( )
# Keep build organized.
SET ( CMAKE_RUNTIME_OUTPUT_DIRECTORY ${ PROJECT_BINARY_DIR } /bin )
SET ( CMAKE_LIBRARY_OUTPUT_DIRECTORY ${ PROJECT_BINARY_DIR } /lib )
SET ( CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${ PROJECT_BINARY_DIR } /lib )
SET ( PACKAGE_DIRECTORY ${ PROJECT_BINARY_DIR } /package )
# Destinations for installing different kinds of targets (pass to install command).
SET ( TARGETS_INST_DEST
R U N T I M E D E S T I N A T I O N $ { C M A K E _ I N S T A L L _ B I N D I R }
L I B R A R Y D E S T I N A T I O N $ { C M A K E _ I N S T A L L _ L I B D I R }
A R C H I V E D E S T I N A T I O N $ { C M A K E _ I N S T A L L _ L I B D I R }
I N C L U D E S D E S T I N A T I O N $ { C M A K E _ I N S T A L L _ I N C L U D E D I R }
)
# Look for dependent/required libraries
CHECK_LIBRARY_EXISTS ( resolv res_servicename "" HAVE_RES_SERVICENAME_IN_LIBRESOLV )
IF ( HAVE_RES_SERVICENAME_IN_LIBRESOLV )
SET ( HAVE_LIBRESOLV 1 )
ENDIF ( )
IF ( APPLE )
CHECK_C_SOURCE_COMPILES ( "
#include <stdio.h>
#include <TargetConditionals.h>
i n t main ( ) {
#if TARGET_OS_IPHONE == 0
#error Not an iPhone target
#endif
r e t u r n 0 ;
}
"
I O S )
CHECK_C_SOURCE_COMPILES ( "
#include <stdio.h>
#include <TargetConditionals.h>
i n t main ( ) {
#if TARGET_OS_IPHONE == 0 || __IPHONE_OS_VERSION_MIN_REQUIRED < 100000
# error Not iOS v10
#endif
r e t u r n 0 ;
}
"
I O S _ V 1 0 )
CHECK_C_SOURCE_COMPILES ( "
#include <stdio.h>
#include <AvailabilityMacros.h>
#ifndef MAC_OS_X_VERSION_10_12
# define MAC_OS_X_VERSION_10_12 101200
#endif
i n t main ( ) {
#if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
# error Not MacOSX 10.12 or higher
#endif
r e t u r n 0 ;
}
"
M A C O S _ V 1 0 1 2 )
ENDIF ( )
IF ( IOS AND HAVE_LIBRESOLV )
SET ( CARES_USE_LIBRESOLV 1 )
ENDIF ( )
CHECK_LIBRARY_EXISTS ( nsl gethostbyname "" HAVE_LIBNSL )
CHECK_LIBRARY_EXISTS ( socket gethostbyname "" HAVE_GHBN_LIBSOCKET )
CHECK_LIBRARY_EXISTS ( socket socket "" HAVE_SOCKET_LIBSOCKET )
IF ( HAVE_GHBN_LIBSOCKET OR HAVE_SOCKET_LIBSOCKET )
SET ( HAVE_LIBSOCKET TRUE )
ENDIF ( )
CHECK_LIBRARY_EXISTS ( rt clock_gettime "" HAVE_LIBRT )
# Look for necessary includes
CHECK_INCLUDE_FILES ( sys/types.h HAVE_SYS_TYPES_H )
CHECK_INCLUDE_FILES ( sys/socket.h HAVE_SYS_SOCKET_H )
CHECK_INCLUDE_FILES ( arpa/inet.h HAVE_ARPA_INET_H )
CHECK_INCLUDE_FILES ( arpa/nameser_compat.h HAVE_ARPA_NAMESER_COMPAT_H )
CHECK_INCLUDE_FILES ( arpa/nameser.h HAVE_ARPA_NAMESER_H )
CHECK_INCLUDE_FILES ( assert.h HAVE_ASSERT_H )
CHECK_INCLUDE_FILES ( errno.h HAVE_ERRNO_H )
CHECK_INCLUDE_FILES ( fcntl.h HAVE_FCNTL_H )
CHECK_INCLUDE_FILES ( inttypes.h HAVE_INTTYPES_H )
CHECK_INCLUDE_FILES ( limits.h HAVE_LIMITS_H )
CHECK_INCLUDE_FILES ( malloc.h HAVE_MALLOC_H )
CHECK_INCLUDE_FILES ( memory.h HAVE_MEMORY_H )
CHECK_INCLUDE_FILES ( netdb.h HAVE_NETDB_H )
CHECK_INCLUDE_FILES ( netinet/in.h HAVE_NETINET_IN_H )
CHECK_INCLUDE_FILES ( netinet/tcp.h HAVE_NETINET_TCP_H )
CHECK_INCLUDE_FILES ( net/if.h HAVE_NET_IF_H )
CHECK_INCLUDE_FILES ( signal.h HAVE_SIGNAL_H )
CHECK_INCLUDE_FILES ( socket.h HAVE_SOCKET_H )
CHECK_INCLUDE_FILES ( stdbool.h HAVE_STDBOOL_H )
CHECK_INCLUDE_FILES ( stdint.h HAVE_STDINT_H )
CHECK_INCLUDE_FILES ( stdlib.h HAVE_STDLIB_H )
CHECK_INCLUDE_FILES ( strings.h HAVE_STRINGS_H )
CHECK_INCLUDE_FILES ( string.h HAVE_STRING_H )
CHECK_INCLUDE_FILES ( stropts.h HAVE_STROPTS_H )
CHECK_INCLUDE_FILES ( sys/ioctl.h HAVE_SYS_IOCTL_H )
CHECK_INCLUDE_FILES ( sys/param.h HAVE_SYS_PARAM_H )
CHECK_INCLUDE_FILES ( sys/select.h HAVE_SYS_SELECT_H )
CHECK_INCLUDE_FILES ( sys/socket.h HAVE_SYS_SOCKET_H )
CHECK_INCLUDE_FILES ( sys/stat.h HAVE_SYS_STAT_H )
CHECK_INCLUDE_FILES ( sys/time.h HAVE_SYS_TIME_H )
CHECK_INCLUDE_FILES ( sys/types.h HAVE_SYS_TYPES_H )
CHECK_INCLUDE_FILES ( sys/uio.h HAVE_SYS_UIO_H )
CHECK_INCLUDE_FILES ( time.h HAVE_TIME_H )
CHECK_INCLUDE_FILES ( dlfcn.h HAVE_DLFCN_H )
CHECK_INCLUDE_FILES ( unistd.h HAVE_UNISTD_H )
# Include order matters for these windows files.
CHECK_INCLUDE_FILES ( "winsock2.h;windows.h" HAVE_WINSOCK2_H )
CHECK_INCLUDE_FILES ( "winsock2.h;ws2tcpip.h;windows.h" HAVE_WS2TCPIP_H )
CHECK_INCLUDE_FILES ( "winsock.h;windows.h" HAVE_WINSOCK_H )
CHECK_INCLUDE_FILES ( windows.h HAVE_WINDOWS_H )
# Set system-specific compiler flags
IF ( CMAKE_SYSTEM_NAME STREQUAL "Darwin" )
LIST ( APPEND SYSFLAGS -D_DARWIN_C_SOURCE )
ELSEIF ( CMAKE_SYSTEM_NAME STREQUAL "Linux" )
LIST ( APPEND SYSFLAGS -D_GNU_SOURCE -D_POSIX_C_SOURCE=199309L -D_XOPEN_SOURCE=600 )
ELSEIF ( CMAKE_SYSTEM_NAME STREQUAL "SunOS" )
LIST ( APPEND SYSFLAGS -D__EXTENSIONS__ -D_REENTRANT -D_XOPEN_SOURCE=600 )
ELSEIF ( CMAKE_SYSTEM_NAME STREQUAL "AIX" )
LIST ( APPEND SYSFLAGS -D_ALL_SOURCE -D_XOPEN_SOURCE=600 )
ELSEIF ( CMAKE_SYSTEM_NAME STREQUAL "FreeBSD" )
# Don't define _XOPEN_SOURCE on FreeBSD, it actually reduces visibility instead of increasing it
ELSEIF ( WIN32 )
Windows DNS server sorting (#81)
Original Patch From Brad Spencer:
https://c-ares.haxx.se/mail/c-ares-archive-2016-04/0000.shtml
My modifications include:
* Dynamically find GetBestRoute2 since it is a Windows Vista+ symbol, and will fall back to prior behavior when not available.
* Prefer get_DNS_AdaptersAddresses as the modifications should alleviate the concerns which caused us to prefer get_DNS_NetworkParams
* Update AppVeyor to use MinGW-w64 instead of the legacy MinGW
* Fix compile error in test suite for Windows.
Original message from patch below:
From: Brad Spencer <bspencer@blackberry.com>
Date: Fri, 29 Apr 2016 14:26:23 -0300
On Windows, the c-ares DNS resolver tries first to get a full list of
DNS server addresses by enumerating the system's IPv4/v6 interfaces and
then getting the per-interface DNS server lists from those interfaces
and joining them together. The OS, at least in the way the c-ares
prefers to query them (which also may be the only or best way in some
environments), does not provide a unified list of DNS servers ordered
according to "current network conditions". Currently, c-ares will then
try to use them in whatever order the nested enumeration produces, which
may result in DNS requests being sent to servers on one interface
(hosting the current default route, for example) that are only intended
to be used via another interface (intended to be used when the first
interface is not available, for example). This, in turn, can lead to
spurious failures and timeouts simply because of the server address
order that resulted because of the enumeration process.
This patch makes the (safe?) assumption that there is no other better
rule to chose which interface's DNS server list should be prioritized.
After all, a DNS lookup isn't something "per network"; applications
don't look up "these DNS names on this interface and those DNS names on
that interface". There is a single resource pool of DNS servers and the
application should presume that any server will give it the "right"
answer. However, even if all DNS servers are assumed to give equally
useful responses, it is reasonable to expect that some DNS servers will
not accept requests on all interfaces. This patch avoids the problem by
sorting the DNS server addresses using the Windows IPv4/v6 routing tables.
For example, a request to DNS server C on interface 2 that is actually
sent over interface 1 (which may happen to have the default route) may
be rejected by or not delivered to DNS server C. So, better to use DNS
servers A and B associated with interface 1, at least as a first try.
By using the metric of the route to the DNS server itself as a proxy for
priority of the DNS server in the list, this patch is able to adapt
dynamically to changes in the interface list, the DNS server lists per
interface, which interfaces are active, the routing table, and so on,
while always picking a good "best" DNS server first.
In cases where any DNS server on any interface will do, this patch still
seems useful because it will prioritize a lower-metric route's (and thus
interface's) servers.
8 years ago
LIST ( APPEND SYSFLAGS -DWIN32_LEAN_AND_MEAN -D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE -D_WIN32_WINNT=0x0600 )
ENDIF ( )
ADD_DEFINITIONS ( ${ SYSFLAGS } )
# Tell C-Ares about libraries to depend on
IF ( HAVE_LIBRESOLV )
LIST ( APPEND CARES_DEPENDENT_LIBS resolv )
ENDIF ( )
IF ( HAVE_LIBNSL )
LIST ( APPEND CARES_DEPENDENT_LIBS nsl )
ENDIF ( )
IF ( HAVE_LIBSOCKET )
LIST ( APPEND CARES_DEPENDENT_LIBS socket )
ENDIF ( )
IF ( HAVE_LIBRT )
LIST ( APPEND CARES_DEPENDENT_LIBS rt )
ENDIF ( )
IF ( WIN32 )
LIST ( APPEND CARES_DEPENDENT_LIBS ws2_32 )
ENDIF ( )
# When checking for symbols, we need to make sure we set the proper
# headers, libraries, and definitions for the detection to work properly
# CMAKE_REQUIRED_DEFINITIONS, CMAKE_REQUIRED_LIBRARIES, and
# CMAKE_EXTRA_INCLUDE_FILES. When we're done with the detection, we'll
# unset them.
SET ( CMAKE_REQUIRED_DEFINITIONS ${ SYSFLAGS } )
LIST ( APPEND CMAKE_REQUIRED_LIBRARIES ${ CARES_DEPENDENT_LIBS } )
MACRO ( CARES_EXTRAINCLUDE_IFSET var include )
IF ( ${ var } )
LIST ( APPEND CMAKE_EXTRA_INCLUDE_FILES ${ include } )
ENDIF ( )
ENDMACRO ( )
CARES_EXTRAINCLUDE_IFSET ( HAVE_STDBOOL_H stdbool.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_SYS_TYPES_H sys/types.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_ARPA_INET_H arpa/inet.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_ARPA_NAMESER_H arpa/nameser.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_NETDB_H netdb.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_NET_IF_H net/if.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_NETINET_IN_H netinet/in.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_NETINET_TCP_H netinet/tcp.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_SIGNAL_H signal.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_STDLIB_H stdlib.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_STRING_H string.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_STRINGS_H strings.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_SYS_IOCTL_H sys/ioctl.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_SYS_SELECT_H sys/select.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_SYS_SOCKET_H sys/socket.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_SYS_TIME_H sys/time.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_SYS_UIO_H sys/uio.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_TIME_H time.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_FCNTL_H fcntl.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_UNISTD_H unistd.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_WINSOCK2_H winsock2.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_WS2TCPIP_H ws2tcpip.h )
CARES_EXTRAINCLUDE_IFSET ( HAVE_WINDOWS_H windows.h )
# Check Types
# CHECK_TYPE_SIZE can't be used to see if a type exists because on Apple when
# building multi-arch, it will throw an error. So we need to wrap
# CHECK_C_SOURCE_COMPILES for our tests.
MACRO ( CARES_TYPE_EXISTS type var )
SET ( _CARES_C_SOURCE "
#include <stdio.h>
#include <stdlib.h>
" )
FOREACH ( _C_HEADER ${ CMAKE_EXTRA_INCLUDE_FILES } )
SET ( _CARES_C_SOURCE " ${ _CARES_C_SOURCE }
#include <${_C_HEADER}>")
ENDFOREACH ( _C_HEADER )
SET ( _CARES_C_SOURCE " ${ _CARES_C_SOURCE }
i n t main ( ) {
$ { t y p e } v a r _ e x i s t s ;
( v o i d ) v a r _ e x i s t s ;
r e t u r n 0 ;
}
" )
CHECK_C_SOURCE_COMPILES ( "${_CARES_C_SOURCE}" ${ var } )
ENDMACRO ( )
CARES_TYPE_EXISTS ( socklen_t HAVE_SOCKLEN_T )
CARES_TYPE_EXISTS ( SOCKET HAVE_TYPE_SOCKET )
CARES_TYPE_EXISTS ( bool HAVE_BOOL_T )
CARES_TYPE_EXISTS ( ssize_t HAVE_SSIZE_T )
CARES_TYPE_EXISTS ( "long long" HAVE_LONGLONG )
CARES_TYPE_EXISTS ( sig_atomic_t HAVE_SIG_ATOMIC_T )
CARES_TYPE_EXISTS ( "struct addrinfo" HAVE_STRUCT_ADDRINFO )
CARES_TYPE_EXISTS ( "struct in6_addr" HAVE_STRUCT_IN6_ADDR )
CARES_TYPE_EXISTS ( "struct sockaddr_in6" HAVE_STRUCT_SOCKADDR_IN6 )
CARES_TYPE_EXISTS ( "struct sockaddr_storage" HAVE_STRUCT_SOCKADDR_STORAGE )
CARES_TYPE_EXISTS ( "struct timeval" HAVE_STRUCT_TIMEVAL )
# Check for preprocessor defines
CHECK_SYMBOL_EXISTS ( AF_INET6 "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_AF_INET6 )
CHECK_SYMBOL_EXISTS ( O_NONBLOCK "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_O_NONBLOCK )
CHECK_SYMBOL_EXISTS ( FIONBIO "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_FIONBIO )
CHECK_SYMBOL_EXISTS ( SIOCGIFADDR "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_IOCTL_SIOCGIFADDR )
CHECK_SYMBOL_EXISTS ( MSG_NOSIGNAL "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_MSG_NOSIGNAL )
CHECK_SYMBOL_EXISTS ( PF_INET6 "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_PF_INET6 )
CHECK_SYMBOL_EXISTS ( SO_NONBLOCK "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_SO_NONBLOCK )
# XCode v8 bug: iOS when targeting less than v10, or MacOS when targeting less than v10.12 will
# say clock_gettime exists, it is a weak symbol that only exists in iOS10/MacOS10.12 and will
# cause a crash at runtime when running on older versions. Skip finding CLOCK_MONOTONIC on older
# OS's.
IF ( ( NOT APPLE ) OR IOS_V10 OR MACOS_V1012 )
CHECK_SYMBOL_EXISTS ( CLOCK_MONOTONIC "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_CLOCK_GETTIME_MONOTONIC )
ENDIF ( )
CHECK_STRUCT_HAS_MEMBER ( "struct sockaddr_in6" sin6_scope_id "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID LANGUAGE C )
# Check for "LL" numeric suffix support
CHECK_C_SOURCE_COMPILES ( "int main() { int n=1234LL; return 0; }" HAVE_LL )
CHECK_SYMBOL_EXISTS ( bitncmp "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_BITNCMP )
CHECK_SYMBOL_EXISTS ( closesocket "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_CLOSESOCKET )
CHECK_SYMBOL_EXISTS ( CloseSocket "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_CLOSESOCKET_CAMEL )
CHECK_SYMBOL_EXISTS ( connect "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_CONNECT )
CHECK_SYMBOL_EXISTS ( fcntl "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_FCNTL )
CHECK_SYMBOL_EXISTS ( freeaddrinfo "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_FREEADDRINFO )
CHECK_SYMBOL_EXISTS ( getaddrinfo "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_GETADDRINFO )
CHECK_SYMBOL_EXISTS ( getenv "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_GETENV )
CHECK_SYMBOL_EXISTS ( gethostbyaddr "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_GETHOSTBYADDR )
CHECK_SYMBOL_EXISTS ( gethostbyname "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_GETHOSTBYNAME )
CHECK_SYMBOL_EXISTS ( gethostname "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_GETHOSTNAME )
CHECK_SYMBOL_EXISTS ( getnameinfo "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_GETNAMEINFO )
CHECK_SYMBOL_EXISTS ( getservbyport_r "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_GETSERVBYPORT_R )
CHECK_SYMBOL_EXISTS ( gettimeofday "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_GETTIMEOFDAY )
CHECK_SYMBOL_EXISTS ( if_indextoname "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_IF_INDEXTONAME )
CHECK_SYMBOL_EXISTS ( inet_net_pton "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_INET_NET_PTON )
IF ( NOT WIN32 )
# Disabled on Windows, because these functions are only really supported on Windows
# Vista or newer (_WIN32_WINNT >= 0x0600). Older versions of Windows may provide
# them as experimental non-working features, so we have to disable them manually.
CHECK_SYMBOL_EXISTS ( inet_ntop "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_INET_NTOP )
CHECK_SYMBOL_EXISTS ( inet_pton "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_INET_PTON )
ENDIF ( )
CHECK_SYMBOL_EXISTS ( ioctl "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_IOCTL )
CHECK_SYMBOL_EXISTS ( ioctlsocket "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_IOCTLSOCKET )
CHECK_SYMBOL_EXISTS ( IoctlSocket "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_IOCTLSOCKET_CAMEL )
CHECK_SYMBOL_EXISTS ( recv "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_RECV )
CHECK_SYMBOL_EXISTS ( recvfrom "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_RECVFROM )
CHECK_SYMBOL_EXISTS ( send "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_SEND )
CHECK_SYMBOL_EXISTS ( setsockopt "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_SETSOCKOPT )
CHECK_SYMBOL_EXISTS ( socket "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_SOCKET )
CHECK_SYMBOL_EXISTS ( strcasecmp "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_STRCASECMP )
CHECK_SYMBOL_EXISTS ( strcmpi "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_STRCMPI )
CHECK_SYMBOL_EXISTS ( strdup "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_STRDUP )
CHECK_SYMBOL_EXISTS ( stricmp "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_STRICMP )
CHECK_SYMBOL_EXISTS ( strncasecmp "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_STRNCASECMP )
CHECK_SYMBOL_EXISTS ( strncmpi "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_STRNCMPI )
CHECK_SYMBOL_EXISTS ( strnicmp "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_STRNICMP )
CHECK_SYMBOL_EXISTS ( writev "${CMAKE_EXTRA_INCLUDE_FILES}" HAVE_WRITEV )
# On Android, the system headers may define __system_property_get(), but excluded
# from libc. We need to perform a link test instead of a header/symbol test.
CHECK_FUNCTION_EXISTS ( __system_property_get HAVE___SYSTEM_PROPERTY_GET )
# Unset temporary data
SET ( CMAKE_EXTRA_INCLUDE_FILES )
SET ( CMAKE_REQUIRED_DEFINITIONS )
SET ( CMAKE_REQUIRED_LIBRARIES )
################################################################################
# recv, recvfrom, send, getnameinfo, gethostname
# ARGUMENTS AND RETURN VALUES
#
# The AutoTools build tries to be really thorough here. So much so that it
# takes forever. We really don't want to do that. Lets make some educated
# guesses based on datatypes we have available, and for others, use some 'sane'
# defaults. This should be much quicker and nearly as accurate ... and even
# if not, it probably won't matter in the least.
IF ( HAVE_SSIZE_T AND HAVE_SOCKLEN_T )
# If we have ssize_t and socklen_t, the API is usually sane and uses ssize_t and size_t for lengths
SET ( RECVFROM_TYPE_RETV ssize_t )
SET ( RECVFROM_TYPE_ARG3 size_t )
ELSE ( )
SET ( RECVFROM_TYPE_RETV int )
SET ( RECVFROM_TYPE_ARG3 int )
ENDIF ( )
IF ( HAVE_TYPE_SOCKET )
# If the SOCKET type is defined, it uses socket ... should be windows only
SET ( RECVFROM_TYPE_ARG1 SOCKET )
ELSE ( )
SET ( RECVFROM_TYPE_ARG1 int )
ENDIF ( )
IF ( HAVE_SOCKLEN_T )
# If we have socklen_t the APIs pretty much always actually use it
SET ( RECVFROM_TYPE_ARG6 "socklen_t *" )
SET ( GETNAMEINFO_TYPE_ARG2 socklen_t )
SET ( GETNAMEINFO_TYPE_ARG46 socklen_t )
ELSE ( )
SET ( RECVFROM_TYPE_ARG6 "int *" )
SET ( GETNAMEINFO_TYPE_ARG2 int )
SET ( GETNAMEINFO_TYPE_ARG46 int )
ENDIF ( )
# Functions are typically consistent so the equivalent fields map ... equivalently
SET ( RECV_TYPE_RETV ${ RECVFROM_TYPE_RETV } )
SET ( SEND_TYPE_RETV ${ RECVFROM_TYPE_RETV } )
SET ( RECV_TYPE_ARG1 ${ RECVFROM_TYPE_ARG1 } )
SET ( SEND_TYPE_ARG1 ${ RECVFROM_TYPE_ARG1 } )
SET ( RECV_TYPE_ARG3 ${ RECVFROM_TYPE_ARG3 } )
SET ( SEND_TYPE_ARG3 ${ RECVFROM_TYPE_ARG3 } )
SET ( GETHOSTNAME_TYPE_ARG2 ${ RECVFROM_TYPE_ARG3 } )
# These should always be "sane" values to use always
SET ( RECVFROM_QUAL_ARG5 )
SET ( RECVFROM_TYPE_ARG2 "void *" )
SET ( RECVFROM_TYPE_ARG4 int )
SET ( RECVFROM_TYPE_ARG5 "struct sockaddr *" )
SET ( RECV_TYPE_ARG2 "void *" )
SET ( RECV_TYPE_ARG4 int )
SET ( GETNAMEINFO_TYPE_ARG1 "struct sockaddr *" )
SET ( GETNAMEINFO_TYPE_ARG7 int )
SET ( SEND_TYPE_ARG2 "void *" )
SET ( SEND_TYPE_ARG4 int )
################################################################################
# HAVE_CXX11 ??
# HAVE_SIG_ATOMIC_T_VOLATILE ??
# Set a few variables by hand that C-Ares wants, logically, based on detection
# data.
IF ( HAVE_SOCKLEN_T )
Set ( CARES_TYPEOF_ARES_SOCKLEN_T "socklen_t" )
ELSE ( )
Set ( CARES_TYPEOF_ARES_SOCKLEN_T "int" )
ENDIF ( )
IF ( HAVE_SSIZE_T )
Set ( CARES_TYPEOF_ARES_SSIZE_T "ssize_t" )
ELSE ( )
IF ( WIN32 )
IF ( "${CMAKE_SIZEOF_VOID_P}" EQUAL "8" )
Set ( CARES_TYPEOF_ARES_SSIZE_T "__int64" )
ELSE ( )
Set ( CARES_TYPEOF_ARES_SSIZE_T "int" )
ENDIF ( )
ELSE ( )
Set ( CARES_TYPEOF_ARES_SSIZE_T "long" )
ENDIF ( )
ENDIF ( )
IF ( HAVE_FCNTL AND HAVE_O_NONBLOCK )
SET ( HAVE_FCNTL_O_NONBLOCK 1 )
ENDIF ( )
IF ( HAVE_IOCTL AND HAVE_FIONBIO )
SET ( HAVE_IOCTL_FIONBIO 1 )
ENDIF ( )
IF ( HAVE_IOCTLSOCKET AND HAVE_FIONBIO )
SET ( HAVE_IOCTLSOCKET_FIONBIO 1 )
ENDIF ( )
IF ( HAVE_IOCTLSOCKET_CAMEL AND HAVE_FIONBIO )
SET ( HAVE_IOCTLSOCKET_CAMEL_FIONBIO 1 )
ENDIF ( )
IF ( HAVE_GETADDRINFO )
IF ( CMAKE_SYSTEM_NAME STREQUAL "Darwin" OR
C M A K E _ S Y S T E M _ N A M E S T R E Q U A L " H P U X " O R
C M A K E _ S Y S T E M _ N A M E S T R E Q U A L " N e t B S D " O R
C M A K E _ S Y S T E M _ N A M E S T R E Q U A L " S u n O S " O R
C M A K E _ S Y S T E M _ N A M E S T R E Q U A L " F r e e B S D " O R
C M A K E _ S Y S T E M _ N A M E S T R E Q U A L " A I X " O R
WIN32 )
SET ( HAVE_GETADDRINFO_THREADSAFE 1 )
ENDIF ( )
ENDIF ( )
IF ( HAVE_TIME_H AND HAVE_SYS_TIME_H )
SET ( TIME_WITH_SYS_TIME 1 )
ENDIF ( )
IF ( HAVE_GETSERVBYPORT_R )
# TODO : Should probably autodetect
IF ( CMAKE_SYSTEM_NAME STREQUAL "SunOS" )
SET ( GETSERVBYPORT_R_ARGS 5 )
ELSEIF ( CMAKE_SYSTEM_NAME STREQUAL "AIX" OR
C M A K E _ S Y S T E M _ N A M E S T R E Q U A L " O p e n B S D " )
SET ( GETSERVBYPORT_R_ARGS 4 )
ELSE ( )
# Probably linux
SET ( GETSERVBYPORT_R_ARGS 6 )
ENDIF ( )
ENDIF ( )
# Set some aliases used for ares_build.h
IF ( HAVE_SYS_TYPES_H )
SET ( CARES_HAVE_SYS_TYPES_H 1 )
ENDIF ( )
IF ( HAVE_SYS_SOCKET_H )
SET ( CARES_HAVE_SYS_SOCKET_H 1 )
ENDIF ( )
IF ( HAVE_WS2TCPIP_H )
SET ( CARES_HAVE_WS2TCPIP_H 1 )
ENDIF ( )
IF ( HAVE_WINSOCK2_H )
SET ( CARES_HAVE_WINSOCK2_H 1 )
ENDIF ( )
IF ( HAVE_WINDOWS_H )
SET ( CARES_HAVE_WINDOWS_H 1 )
ENDIF ( )
# Write ares_build.h configuration file. This is an installed file.
CONFIGURE_FILE ( ares_build.h.cmake ${ PROJECT_BINARY_DIR } /ares_build.h )
# Write ares_config.h configuration file. This is used only for the build.
CONFIGURE_FILE ( ares_config.h.cmake ${ PROJECT_BINARY_DIR } /ares_config.h )
# TRANSFORM_MAKEFILE_INC
#
# This function consumes the "Makefile.inc" autotools file, and converts it into
# "Makefile.inc.cmake", a cmake include file; transforming this:
#
# CSOURCES = ares__close_sockets.c \
# ares__get_hostent.c \
# ares__read_line.c \
# ...
#
# into this:
#
# SET (CSOURCES
# ares__close_sockets.c
# ares__get_hostent.c
# ares__read_line.c
# ...
function ( TRANSFORM_MAKEFILE_INC INPUT_FILE OUTPUT_FILE )
file ( READ ${ INPUT_FILE } MAKEFILE_INC_TEXT )
string ( REPLACE "$(top_srcdir)" "\${PROJECT_SOURCE_DIR}" MAKEFILE_INC_TEXT ${ MAKEFILE_INC_TEXT } )
string ( REPLACE "$(top_builddir)" "\${PROJECT_BINARY_DIR}" MAKEFILE_INC_TEXT ${ MAKEFILE_INC_TEXT } )
string ( REGEX REPLACE "\\\\\n" "ß!ß" MAKEFILE_INC_TEXT ${ MAKEFILE_INC_TEXT } )
string ( REGEX REPLACE "([a-zA-Z_][a-zA-Z0-9_]*)[\t ]*=[\t ]*([^\n]*)" "SET(\\1 \\2)" MAKEFILE_INC_TEXT ${ MAKEFILE_INC_TEXT } )
string ( REPLACE "ß!ß" "\n" MAKEFILE_INC_TEXT ${ MAKEFILE_INC_TEXT } )
string ( REGEX REPLACE "\\$\\(([a-zA-Z_][a-zA-Z0-9_]*)\\)" "\${\\1}" MAKEFILE_INC_TEXT ${ MAKEFILE_INC_TEXT } ) # Replace $() with ${}
string ( REGEX REPLACE "@([a-zA-Z_][a-zA-Z0-9_]*)@" "\${\\1}" MAKEFILE_INC_TEXT ${ MAKEFILE_INC_TEXT } ) # Replace @@ with ${}, even if that may not be read by CMake scripts.
file ( WRITE ${ OUTPUT_FILE } ${ MAKEFILE_INC_TEXT } )
endfunction ( )
# run the function...
transform_makefile_inc ( "Makefile.inc" "${PROJECT_BINARY_DIR}/Makefile.inc.cmake" )
include ( ${ PROJECT_BINARY_DIR } /Makefile.inc.cmake )
# Build the dynamic/shared library
IF ( CARES_SHARED )
ADD_LIBRARY ( ${ PROJECT_NAME } SHARED ${ CSOURCES } )
# Convert CARES_LIB_VERSIONINFO libtool version format into VERSION and SOVERSION
# Convert from ":" separated into CMake list format using ";"
STRING ( REPLACE ":" ";" CARES_LIB_VERSIONINFO ${ CARES_LIB_VERSIONINFO } )
LIST ( GET CARES_LIB_VERSIONINFO 0 CARES_LIB_VERSION_CURRENT )
LIST ( GET CARES_LIB_VERSIONINFO 1 CARES_LIB_VERSION_REVISION )
LIST ( GET CARES_LIB_VERSIONINFO 2 CARES_LIB_VERSION_AGE )
MATH ( EXPR CARES_LIB_VERSION_MAJOR "${CARES_LIB_VERSION_CURRENT} - ${CARES_LIB_VERSION_AGE}" )
SET ( CARES_LIB_VERSION_MINOR "${CARES_LIB_VERSION_AGE}" )
SET ( CARES_LIB_VERSION_RELEASE "${CARES_LIB_VERSION_REVISION}" )
SET_TARGET_PROPERTIES ( ${ PROJECT_NAME } PROPERTIES
E X P O R T _ N A M E c a r e s
O U T P U T _ N A M E c a r e s
V E R S I O N " $ { C A R E S _ L I B _ V E R S I O N _ M A J O R } . $ { C A R E S _ L I B _ V E R S I O N _ M I N O R } . $ { C A R E S _ L I B _ V E R S I O N _ R E L E A S E } "
S O V E R S I O N " $ { C A R E S _ L I B _ V E R S I O N _ M A J O R } "
)
TARGET_INCLUDE_DIRECTORIES ( ${ PROJECT_NAME } PUBLIC "$<BUILD_INTERFACE:${PROJECT_BINARY_DIR}>" )
TARGET_INCLUDE_DIRECTORIES ( ${ PROJECT_NAME } PUBLIC "$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}>" )
TARGET_COMPILE_DEFINITIONS ( ${ PROJECT_NAME } PRIVATE HAVE_CONFIG_H=1 CARES_BUILDING_LIBRARY )
TARGET_LINK_LIBRARIES ( ${ PROJECT_NAME } PUBLIC ${ CARES_DEPENDENT_LIBS } )
IF ( CARES_INSTALL )
INSTALL ( TARGETS ${ PROJECT_NAME } EXPORT ${ PROJECT_NAME } -targets
$ { T A R G E T S _ I N S T _ D E S T }
)
ENDIF ( )
SET ( STATIC_SUFFIX "_static" )
# For chain building: add alias targets that look like import libs that would be returned by find_package(c-ares).
ADD_LIBRARY ( ${ PROJECT_NAME } ::cares_shared ALIAS ${ PROJECT_NAME } )
ADD_LIBRARY ( ${ PROJECT_NAME } ::cares ALIAS ${ PROJECT_NAME } )
ENDIF ( )
# Build the static library
IF ( CARES_STATIC )
SET ( LIBNAME ${ PROJECT_NAME } ${ STATIC_SUFFIX } )
ADD_LIBRARY ( ${ LIBNAME } STATIC ${ CSOURCES } )
SET_TARGET_PROPERTIES ( ${ LIBNAME } PROPERTIES
E X P O R T _ N A M E c a r e s $ { S T A T I C _ S U F F I X }
O U T P U T _ N A M E c a r e s $ { S T A T I C _ S U F F I X }
)
IF ( CARES_STATIC_PIC )
SET_TARGET_PROPERTIES ( ${ LIBNAME } PROPERTIES POSITION_INDEPENDENT_CODE True )
ENDIF ( )
TARGET_INCLUDE_DIRECTORIES ( ${ LIBNAME } PUBLIC "$<BUILD_INTERFACE:${PROJECT_BINARY_DIR}>" )
TARGET_INCLUDE_DIRECTORIES ( ${ LIBNAME } PUBLIC "$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}>" )
TARGET_COMPILE_DEFINITIONS ( ${ LIBNAME }
P U B L I C C A R E S _ S T A T I C L I B
P R I V A T E H A V E _ C O N F I G _ H = 1
)
TARGET_LINK_LIBRARIES ( ${ LIBNAME } PUBLIC ${ CARES_DEPENDENT_LIBS } )
IF ( CARES_INSTALL )
INSTALL ( TARGETS ${ LIBNAME } EXPORT ${ PROJECT_NAME } -targets
$ { T A R G E T S _ I N S T _ D E S T }
)
ENDIF ( )
# For chain building: add alias targets that look like import libs that would be returned by find_package(c-ares).
ADD_LIBRARY ( ${ PROJECT_NAME } ::cares_static ALIAS ${ LIBNAME } )
IF ( NOT TARGET ${ PROJECT_NAME } ::cares )
# Only use static for the generic alias if shared lib wasn't built.
ADD_LIBRARY ( ${ PROJECT_NAME } ::cares ALIAS ${ LIBNAME } )
ENDIF ( )
ENDIF ( )
# Headers installation target
IF ( CARES_INSTALL )
SET ( CARES_HEADERS ares.h ares_version.h ares_dns.h "${PROJECT_BINARY_DIR}/ares_build.h" ares_rules.h )
INSTALL ( FILES ${ CARES_HEADERS } DESTINATION ${ CMAKE_INSTALL_INCLUDEDIR } )
ENDIF ( )
# Export targets
IF ( CARES_INSTALL )
SET ( CMAKECONFIG_INSTALL_DIR "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}" )
INCLUDE ( CMakePackageConfigHelpers )
CONFIGURE_PACKAGE_CONFIG_FILE ( ${ PROJECT_NAME } -config.cmake.in ${ PROJECT_NAME } -config.cmake
I N S T A L L _ D E S T I N A T I O N $ { C M A K E C O N F I G _ I N S T A L L _ D I R }
P A T H _ V A R S C M A K E _ I N S T A L L _ I N C L U D E D I R
N O _ C H E C K _ R E Q U I R E D _ C O M P O N E N T S _ M A C R O
)
INSTALL ( EXPORT ${ PROJECT_NAME } -targets DESTINATION ${ CMAKECONFIG_INSTALL_DIR } NAMESPACE ${ PROJECT_NAME } :: )
INSTALL ( FILES "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config.cmake" DESTINATION ${ CMAKECONFIG_INSTALL_DIR } )
ENDIF ( )
# Legacy chain-building variables (provided for compatibility with old code).
# Don't use these, external code should be updated to refer to the aliases directly (e.g., Cares::cares).
SET ( CARES_FOUND 1 CACHE INTERNAL "CARES LIBRARY FOUND" )
SET ( CARES_LIBRARIES ${ PROJECT_NAME } ::cares CACHE INTERNAL "CARES LIBRARIES" )
# Build ahost
ADD_EXECUTABLE ( ahost ahost.c ${ SAMPLESOURCES } )
TARGET_COMPILE_DEFINITIONS ( ahost PRIVATE HAVE_CONFIG_H=1 )
TARGET_LINK_LIBRARIES ( ahost PRIVATE ${ PROJECT_NAME } )
IF ( CARES_INSTALL )
INSTALL ( TARGETS ahost ${ TARGETS_INST_DEST } )
ENDIF ( )
# Build adig
ADD_EXECUTABLE ( adig adig.c ${ SAMPLESOURCES } )
TARGET_COMPILE_DEFINITIONS ( adig PRIVATE HAVE_CONFIG_H=1 )
TARGET_LINK_LIBRARIES ( adig PRIVATE ${ PROJECT_NAME } )
IF ( CARES_INSTALL )
INSTALL ( TARGETS adig ${ TARGETS_INST_DEST } )
ENDIF ( )
# Build acountry
ADD_EXECUTABLE ( acountry acountry.c ${ SAMPLESOURCES } )
TARGET_COMPILE_DEFINITIONS ( acountry PRIVATE HAVE_CONFIG_H=1 )
TARGET_LINK_LIBRARIES ( acountry PRIVATE ${ PROJECT_NAME } )
IF ( CARES_INSTALL )
INSTALL ( TARGETS acountry ${ TARGETS_INST_DEST } )
ENDIF ( )
