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mirror of https://github.com/moparisthebest/curl synced 2024-11-05 00:55:04 -05:00
curl/CMakeLists.txt
Yang Tse 43d20d81a5 Enable OpenLDAP support for cygwin builds.
Enable OpenLDAP support for cygwin builds. This support was disabled back
in 2008 due to incompatibilities between OpenSSL and OpenLDAP headers.
cygwin's OpenSSL 0.9.8l and OpenLDAP 2.3.43 versions on cygwin 1.5.25
allow building an OpenLDAP enabled libcurl supporting back to Windows 95.

Remove non-functional CURL_LDAP_HYBRID code and references.
2010-06-04 15:14:31 +02:00

855 lines
33 KiB
CMake
Raw Blame History

# cURL/libcurl CMake script
# by Tetetest and Sukender (Benoit Neil)
# TODO:
# The output .so file lacks the soname number which we currently have within the lib/Makefile.am file
# Add full (4 or 5 libs) SSL support
# Add INSTALL target (EXTRA_DIST variables in Makefile.am may be moved to Makefile.inc so that CMake/CPack is aware of what's to include).
# Add CTests(?)
# Check on all possible platforms
# Test with as many configurations possible (With or without any option)
# Create scripts that help keeping the CMake build system up to date (to reduce maintenance). According to Tetetest:
# - lists of headers that 'configure' checks for;
# - curl-specific tests (the ones that are in m4/curl-*.m4 files);
# - (most obvious thing:) curl version numbers.
# Add documentation subproject
#
# To check:
# (From Daniel Stenberg) The cmake build selected to run gcc with -fPIC on my box while the plain configure script did not.
# (From Daniel Stenberg) The gcc command line use neither -g nor any -O options. As a developer, I also treasure our configure scripts's --enable-debug option that sets a long range of "picky" compiler options.
cmake_minimum_required(VERSION 2.6.2 FATAL_ERROR)
set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/CMake;${CMAKE_MODULE_PATH}")
include(Utilities)
project( CURL C )
file (READ ${CURL_SOURCE_DIR}/include/curl/curlver.h CURL_VERSION_H_CONTENTS)
string (REGEX MATCH "LIBCURL_VERSION_MAJOR[ \t]+([0-9]+)"
LIBCURL_VERSION_MJ ${CURL_VERSION_H_CONTENTS})
string (REGEX MATCH "([0-9]+)"
LIBCURL_VERSION_MJ ${LIBCURL_VERSION_MJ})
string (REGEX MATCH
"LIBCURL_VERSION_MINOR[ \t]+([0-9]+)"
LIBCURL_VERSION_MI ${CURL_VERSION_H_CONTENTS})
string (REGEX MATCH "([0-9]+)" LIBCURL_VERSION_MI ${LIBCURL_VERSION_MI})
string (REGEX MATCH
"LIBCURL_VERSION_PATCH[ \t]+([0-9]+)"
LIBCURL_VERSION_PT ${CURL_VERSION_H_CONTENTS})
string (REGEX MATCH "([0-9]+)" LIBCURL_VERSION_PT ${LIBCURL_VERSION_PT})
set (CURL_MAJOR_VERSION ${LIBCURL_VERSION_MJ})
set (CURL_MINOR_VERSION ${LIBCURL_VERSION_MI})
set (CURL_PATCH_VERSION ${LIBCURL_VERSION_PT})
include_regular_expression("^.*$") # Sukender: Is it necessary?
# Setup package meta-data
# SET(PACKAGE "curl")
set(CURL_VERSION ${CURL_MAJOR_VERSION}.${CURL_MINOR_VERSION}.${CURL_PATCH_VERSION})
message(STATUS "curl version=[${CURL_VERSION}]")
# SET(PACKAGE_TARNAME "curl")
# SET(PACKAGE_NAME "curl")
# SET(PACKAGE_VERSION "-")
# SET(PACKAGE_STRING "curl-")
# SET(PACKAGE_BUGREPORT "a suitable curl mailing list => http://curl.haxx.se/mail/")
set(OPERATING_SYSTEM "${CMAKE_SYSTEM_NAME}")
set(OS "\"${CMAKE_SYSTEM_NAME}\"")
include_directories(${PROJECT_BINARY_DIR}/include/curl)
include_directories( ${CURL_SOURCE_DIR}/include )
if(WIN32)
set(NATIVE_WINDOWS ON)
endif()
option(BUILD_CURL_EXE "Set to ON to build cURL executable." ON)
option(BUILD_CURL_TESTS "Set to ON to build cURL tests." ON)
option(CURL_STATICLIB "Set to ON to build libcurl with static linking." OFF)
option(CURL_USE_ARES "Set to ON to enable c-ares support" OFF)
# initialize CURL_LIBS
set(CURL_LIBS "")
if(CURL_USE_ARES)
set(USE_ARES ${CURL_USE_ARES})
find_package(CARES REQUIRED)
list(APPEND CURL_LIBS ${CARES_LIBRARY} )
set(CURL_LIBS ${CURL_LIBS} ${CARES_LIBRARY})
endif()
option(BUILD_DASHBOARD_REPORTS "Set to ON to activate reporting of cURL builds here http://www.cdash.org/CDashPublic/index.php?project=CURL" OFF)
if(BUILD_DASHBOARD_REPORTS)
#INCLUDE(Dart)
include(CTest)
endif(BUILD_DASHBOARD_REPORTS)
if(MSVC)
option(BUILD_RELEASE_DEBUG_DIRS "Set OFF to build each configuration to a separate directory" OFF)
mark_as_advanced(BUILD_RELEASE_DEBUG_DIRS)
endif()
option(CURL_HIDDEN_SYMBOLS "Set to ON to hide libcurl internal symbols (=hide all symbols that aren't officially external)." ON)
mark_as_advanced(CURL_HIDDEN_SYMBOLS)
# IF(WIN32)
# OPTION(CURL_WINDOWS_SSPI "Use windows libraries to allow NTLM authentication without openssl" ON)
# MARK_AS_ADVANCED(CURL_WINDOWS_SSPI)
# ENDIF()
option(HTTP_ONLY "disables all protocols except HTTP (This overrides all CURL_DISABLE_* options)" OFF)
mark_as_advanced(HTTP_ONLY)
option(CURL_DISABLE_FTP "disables FTP" OFF)
mark_as_advanced(CURL_DISABLE_FTP)
option(CURL_DISABLE_LDAP "disables LDAP" OFF)
mark_as_advanced(CURL_DISABLE_LDAP)
option(CURL_DISABLE_TELNET "disables Telnet" OFF)
mark_as_advanced(CURL_DISABLE_TELNET)
option(CURL_DISABLE_DICT "disables DICT" OFF)
mark_as_advanced(CURL_DISABLE_DICT)
option(CURL_DISABLE_FILE "disables FILE" OFF)
mark_as_advanced(CURL_DISABLE_FILE)
option(CURL_DISABLE_TFTP "disables TFTP" OFF)
mark_as_advanced(CURL_DISABLE_TFTP)
option(CURL_DISABLE_HTTP "disables HTTP" OFF)
mark_as_advanced(CURL_DISABLE_HTTP)
option(CURL_DISABLE_LDAPS "to disable LDAPS" OFF)
mark_as_advanced(CURL_DISABLE_LDAPS)
if(WIN32)
set(CURL_DEFAULT_DISABLE_LDAP OFF)
# some windows compilers do not have wldap32
if( NOT HAVE_WLDAP32)
set(CURL_DISABLE_LDAP ON CACHE BOOL "" FORCE)
message(STATUS "wldap32 not found CURL_DISABLE_LDAP set ON")
option(CURL_LDAP_WIN "Use Windows LDAP implementation" OFF)
else()
option(CURL_LDAP_WIN "Use Windows LDAP implementation" ON)
endif()
mark_as_advanced(CURL_LDAP_WIN)
endif()
if(HTTP_ONLY)
set(CURL_DISABLE_FTP ON)
set(CURL_DISABLE_LDAP ON)
set(CURL_DISABLE_TELNET ON)
set(CURL_DISABLE_DICT ON)
set(CURL_DISABLE_FILE ON)
set(CURL_DISABLE_TFTP ON)
endif()
option(CURL_DISABLE_COOKIES "to disable cookies support" OFF)
mark_as_advanced(CURL_DISABLE_COOKIES)
option(CURL_DISABLE_CRYPTO_AUTH "to disable cryptographic authentication" OFF)
mark_as_advanced(CURL_DISABLE_CRYPTO_AUTH)
option(CURL_DISABLE_VERBOSE_STRINGS "to disable verbose strings" OFF)
mark_as_advanced(CURL_DISABLE_VERBOSE_STRINGS)
option(DISABLED_THREADSAFE "Set to explicitly specify we don't want to use thread-safe functions" OFF)
mark_as_advanced(DISABLED_THREADSAFE)
option(ENABLE_IPV6 "Define if you want to enable IPv6 support" OFF)
mark_as_advanced(ENABLE_IPV6)
if(WIN32)
list_spaces_append_once(CMAKE_C_STANDARD_LIBRARIES wsock32.lib ws2_32.lib) # bufferoverflowu.lib
if(CURL_DISABLE_LDAP)
# Remove wldap32.lib from space-separated list
string(REPLACE " " ";" _LIST ${CMAKE_C_STANDARD_LIBRARIES})
list(REMOVE_ITEM _LIST "wldap32.lib")
to_list_spaces(_LIST CMAKE_C_STANDARD_LIBRARIES)
else()
# Append wldap32.lib
list_spaces_append_once(CMAKE_C_STANDARD_LIBRARIES wldap32.lib)
endif()
set(CMAKE_C_STANDARD_LIBRARIES "${CMAKE_C_STANDARD_LIBRARIES}" CACHE STRING "" FORCE)
endif()
# We need ansi c-flags, especially on HP
set(CMAKE_C_FLAGS "${CMAKE_ANSI_CFLAGS} ${CMAKE_C_FLAGS}")
set(CMAKE_REQUIRED_FLAGS ${CMAKE_ANSI_CFLAGS})
# Disable warnings on Borland to avoid changing 3rd party code.
if(BORLAND)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -w-")
endif(BORLAND)
# If we are on AIX, do the _ALL_SOURCE magic
if(${CMAKE_SYSTEM_NAME} MATCHES AIX)
set(_ALL_SOURCE 1)
endif(${CMAKE_SYSTEM_NAME} MATCHES AIX)
# Include all the necessary files for macros
include (CheckFunctionExists)
include (CheckIncludeFile)
include (CheckIncludeFiles)
include (CheckLibraryExists)
include (CheckSymbolExists)
# if crosscompiling is on, the CHECK_TYPE_SIZE macro coming with cmake uses
# TRY_COMPILE instead of TRY_RUN which makes crosscompiling easier, Alex
if(CMAKE_CROSSCOMPILING)
include ("${CMAKE_MODULE_PATH}/CheckTypeSize.cmake")
else(CMAKE_CROSSCOMPILING)
include (CheckTypeSize)
endif(CMAKE_CROSSCOMPILING)
# On windows preload settings
if(WIN32)
include(${CMAKE_CURRENT_SOURCE_DIR}/CMake/Platforms/WindowsCache.cmake)
endif(WIN32)
# This macro checks if the symbol exists in the library and if it
# does, it appends library to the list.
macro(CHECK_LIBRARY_EXISTS_CONCAT LIBRARY SYMBOL VARIABLE)
check_library_exists("${LIBRARY};${CURL_LIBS}" ${SYMBOL} ""
${VARIABLE})
if(${VARIABLE})
set(CURL_LIBS ${CURL_LIBS} ${LIBRARY})
endif(${VARIABLE})
endmacro(CHECK_LIBRARY_EXISTS_CONCAT)
# Check for all needed libraries
check_library_exists_concat("dl" dlopen HAVE_LIBDL)
check_library_exists_concat("socket" connect HAVE_LIBSOCKET)
check_library_exists("c" gethostbyname "" NOT_NEED_LIBNSL)
# Yellowtab Zeta needs different libraries than BeOS 5.
if(BEOS)
set(NOT_NEED_LIBNSL 1)
check_library_exists_concat("bind" gethostbyname HAVE_LIBBIND)
check_library_exists_concat("bnetapi" closesocket HAVE_LIBBNETAPI)
endif(BEOS)
if(NOT NOT_NEED_LIBNSL)
check_library_exists_concat("nsl" gethostbyname HAVE_LIBNSL)
endif(NOT NOT_NEED_LIBNSL)
check_library_exists_concat("ws2_32" getch HAVE_LIBWS2_32)
check_library_exists_concat("winmm" getch HAVE_LIBWINMM)
check_library_exists("wldap32" cldap_open "" HAVE_WLDAP32)
# IF(NOT CURL_SPECIAL_LIBZ)
# CHECK_LIBRARY_EXISTS_CONCAT("z" inflateEnd HAVE_LIBZ)
# ENDIF(NOT CURL_SPECIAL_LIBZ)
option(CMAKE_USE_OPENSSL "Use OpenSSL code. Experimental" ON)
mark_as_advanced(CMAKE_USE_OPENSSL)
if(CMAKE_USE_OPENSSL)
if(WIN32)
find_package(OpenSSL)
if(OPENSSL_FOUND)
set(USE_SSLEAY TRUE)
set(USE_OPENSSL TRUE)
list(APPEND CURL_LIBS ${OPENSSL_LIBRARIES} )
else()
set(CMAKE_USE_OPENSSL FALSE)
message(STATUS "OpenSSL NOT Found, disabling CMAKE_USE_OPENSSL")
endif()
else(WIN32)
check_library_exists_concat("crypto" CRYPTO_lock HAVE_LIBCRYPTO)
check_library_exists_concat("ssl" SSL_connect HAVE_LIBSSL)
endif(WIN32)
endif(CMAKE_USE_OPENSSL)
# Check for idn
check_library_exists_concat("idn" idna_to_ascii_lz HAVE_LIBIDN)
# Check for LDAP
check_library_exists_concat("ldap" ldap_init HAVE_LIBLDAP)
# if(NOT HAVE_LIBLDAP)
# SET(CURL_DISABLE_LDAP ON)
# endif(NOT HAVE_LIBLDAP)
# Check for symbol dlopen (same as HAVE_LIBDL)
check_library_exists("${CURL_LIBS}" dlopen "" HAVE_DLOPEN)
# For other tests to use the same libraries
set(CMAKE_REQUIRED_LIBRARIES ${CURL_LIBS})
option(CURL_ZLIB "Set to ON to enable building cURL with zlib support." ON)
set(HAVE_LIBZ OFF)
set(HAVE_ZLIB_H OFF)
set(HAVE_ZLIB OFF)
if(CURL_ZLIB) # AND CURL_CONFIG_HAS_BEEN_RUN_BEFORE
find_package(ZLIB QUIET)
if(ZLIB_FOUND)
set(HAVE_ZLIB_H ON)
set(HAVE_ZLIB ON)
set(HAVE_LIBZ ON)
endif()
endif()
# If we have features.h, then do the _BSD_SOURCE magic
check_include_file("features.h" HAVE_FEATURES_H)
# Check if header file exists and add it to the list.
macro(CHECK_INCLUDE_FILE_CONCAT FILE VARIABLE)
check_include_files("${CURL_INCLUDES};${FILE}" ${VARIABLE})
if(${VARIABLE})
set(CURL_INCLUDES ${CURL_INCLUDES} ${FILE})
set(CURL_TEST_DEFINES "${CURL_TEST_DEFINES} -D${VARIABLE}")
endif(${VARIABLE})
endmacro(CHECK_INCLUDE_FILE_CONCAT)
# Check for header files
if(NOT UNIX)
check_include_file_concat("ws2tcpip.h" HAVE_WS2TCPIP_H)
check_include_file_concat("winsock2.h" HAVE_WINSOCK2_H)
endif(NOT UNIX)
check_include_file_concat("stdio.h" HAVE_STDIO_H)
if(NOT UNIX)
check_include_file_concat("windows.h" HAVE_WINDOWS_H)
check_include_file_concat("winsock.h" HAVE_WINSOCK_H)
endif(NOT UNIX)
check_include_file_concat("inttypes.h" HAVE_INTTYPES_H)
check_include_file_concat("sys/filio.h" HAVE_SYS_FILIO_H)
check_include_file_concat("sys/ioctl.h" HAVE_SYS_IOCTL_H)
check_include_file_concat("sys/param.h" HAVE_SYS_PARAM_H)
check_include_file_concat("sys/poll.h" HAVE_SYS_POLL_H)
check_include_file_concat("sys/resource.h" HAVE_SYS_RESOURCE_H)
check_include_file_concat("sys/select.h" HAVE_SYS_SELECT_H)
check_include_file_concat("sys/socket.h" HAVE_SYS_SOCKET_H)
check_include_file_concat("sys/sockio.h" HAVE_SYS_SOCKIO_H)
check_include_file_concat("sys/stat.h" HAVE_SYS_STAT_H)
check_include_file_concat("sys/time.h" HAVE_SYS_TIME_H)
check_include_file_concat("sys/types.h" HAVE_SYS_TYPES_H)
check_include_file_concat("sys/uio.h" HAVE_SYS_UIO_H)
check_include_file_concat("sys/un.h" HAVE_SYS_UN_H)
check_include_file_concat("sys/utime.h" HAVE_SYS_UTIME_H)
check_include_file_concat("alloca.h" HAVE_ALLOCA_H)
check_include_file_concat("arpa/inet.h" HAVE_ARPA_INET_H)
check_include_file_concat("arpa/tftp.h" HAVE_ARPA_TFTP_H)
check_include_file_concat("assert.h" HAVE_ASSERT_H)
check_include_file_concat("crypto.h" HAVE_CRYPTO_H)
check_include_file_concat("des.h" HAVE_DES_H)
check_include_file_concat("err.h" HAVE_ERR_H)
check_include_file_concat("errno.h" HAVE_ERRNO_H)
check_include_file_concat("fcntl.h" HAVE_FCNTL_H)
check_include_file_concat("gssapi/gssapi.h" HAVE_GSSAPI_GSSAPI_H)
check_include_file_concat("gssapi/gssapi_generic.h" HAVE_GSSAPI_GSSAPI_GENERIC_H)
check_include_file_concat("gssapi/gssapi_krb5.h" HAVE_GSSAPI_GSSAPI_KRB5_H)
check_include_file_concat("idn-free.h" HAVE_IDN_FREE_H)
check_include_file_concat("ifaddrs.h" HAVE_IFADDRS_H)
check_include_file_concat("io.h" HAVE_IO_H)
check_include_file_concat("krb.h" HAVE_KRB_H)
check_include_file_concat("libgen.h" HAVE_LIBGEN_H)
check_include_file_concat("libssh2.h" HAVE_LIBSSH2_H)
check_include_file_concat("limits.h" HAVE_LIMITS_H)
check_include_file_concat("locale.h" HAVE_LOCALE_H)
check_include_file_concat("net/if.h" HAVE_NET_IF_H)
check_include_file_concat("netdb.h" HAVE_NETDB_H)
check_include_file_concat("netinet/in.h" HAVE_NETINET_IN_H)
check_include_file_concat("netinet/tcp.h" HAVE_NETINET_TCP_H)
check_include_file_concat("openssl/crypto.h" HAVE_OPENSSL_CRYPTO_H)
check_include_file_concat("openssl/engine.h" HAVE_OPENSSL_ENGINE_H)
check_include_file_concat("openssl/err.h" HAVE_OPENSSL_ERR_H)
check_include_file_concat("openssl/pem.h" HAVE_OPENSSL_PEM_H)
check_include_file_concat("openssl/pkcs12.h" HAVE_OPENSSL_PKCS12_H)
check_include_file_concat("openssl/rsa.h" HAVE_OPENSSL_RSA_H)
check_include_file_concat("openssl/ssl.h" HAVE_OPENSSL_SSL_H)
check_include_file_concat("openssl/x509.h" HAVE_OPENSSL_X509_H)
check_include_file_concat("pem.h" HAVE_PEM_H)
check_include_file_concat("poll.h" HAVE_POLL_H)
check_include_file_concat("pwd.h" HAVE_PWD_H)
check_include_file_concat("rsa.h" HAVE_RSA_H)
check_include_file_concat("setjmp.h" HAVE_SETJMP_H)
check_include_file_concat("sgtty.h" HAVE_SGTTY_H)
check_include_file_concat("signal.h" HAVE_SIGNAL_H)
check_include_file_concat("ssl.h" HAVE_SSL_H)
check_include_file_concat("stdbool.h" HAVE_STDBOOL_H)
check_include_file_concat("stdint.h" HAVE_STDINT_H)
check_include_file_concat("stdio.h" HAVE_STDIO_H)
check_include_file_concat("stdlib.h" HAVE_STDLIB_H)
check_include_file_concat("string.h" HAVE_STRING_H)
check_include_file_concat("strings.h" HAVE_STRINGS_H)
check_include_file_concat("stropts.h" HAVE_STROPTS_H)
check_include_file_concat("termio.h" HAVE_TERMIO_H)
check_include_file_concat("termios.h" HAVE_TERMIOS_H)
check_include_file_concat("time.h" HAVE_TIME_H)
check_include_file_concat("tld.h" HAVE_TLD_H)
check_include_file_concat("unistd.h" HAVE_UNISTD_H)
check_include_file_concat("utime.h" HAVE_UTIME_H)
check_include_file_concat("x509.h" HAVE_X509_H)
check_include_file_concat("process.h" HAVE_PROCESS_H)
check_include_file_concat("stddef.h" HAVE_STDDEF_H)
check_include_file_concat("dlfcn.h" HAVE_DLFCN_H)
check_include_file_concat("malloc.h" HAVE_MALLOC_H)
check_include_file_concat("memory.h" HAVE_MEMORY_H)
check_include_file_concat("ldap.h" HAVE_LDAP_H)
check_include_file_concat("netinet/if_ether.h" HAVE_NETINET_IF_ETHER_H)
check_include_file_concat("stdint.h" HAVE_STDINT_H)
check_include_file_concat("sockio.h" HAVE_SOCKIO_H)
check_include_file_concat("sys/utsname.h" HAVE_SYS_UTSNAME_H)
check_include_file_concat("idna.h" HAVE_IDNA_H)
if(CMAKE_USE_OPENSSL)
check_include_file_concat("openssl/rand.h" HAVE_OPENSSL_RAND_H)
endif(CMAKE_USE_OPENSSL)
if(NOT HAVE_LDAP_H)
message(STATUS "LDAP_H not found CURL_DISABLE_LDAP set ON")
set(CURL_DISABLE_LDAP ON CACHE BOOL "" FORCE)
endif()
check_type_size(size_t SIZEOF_SIZE_T)
check_type_size(ssize_t SIZEOF_SSIZE_T)
check_type_size("long long" SIZEOF_LONG_LONG)
check_type_size("long" SIZEOF_LONG)
check_type_size("short" SIZEOF_SHORT)
check_type_size("int" SIZEOF_INT)
check_type_size("__int64" SIZEOF___INT64)
check_type_size("long double" SIZEOF_LONG_DOUBLE)
check_type_size("time_t" SIZEOF_TIME_T)
if(NOT HAVE_SIZEOF_SSIZE_T)
if(SIZEOF_LONG EQUAL SIZEOF_SIZE_T)
set(ssize_t long)
endif(SIZEOF_LONG EQUAL SIZEOF_SIZE_T)
if(NOT ssize_t AND SIZEOF___INT64 EQUAL SIZEOF_SIZE_T)
set(ssize_t __int64)
endif(NOT ssize_t AND SIZEOF___INT64 EQUAL SIZEOF_SIZE_T)
endif(NOT HAVE_SIZEOF_SSIZE_T)
# Different sizeofs, etc.
# define CURL_SIZEOF_LONG 4
# define CURL_TYPEOF_CURL_OFF_T long long
# define CURL_FORMAT_CURL_OFF_T "lld"
# define CURL_FORMAT_CURL_OFF_TU "llu"
# define CURL_FORMAT_OFF_T "%lld"
# define CURL_SIZEOF_CURL_OFF_T 8
# define CURL_SUFFIX_CURL_OFF_T LL
# define CURL_SUFFIX_CURL_OFF_TU ULL
set(CURL_SIZEOF_LONG ${SIZEOF_LONG})
if(SIZEOF_LONG EQUAL 8)
set(CURL_TYPEOF_CURL_OFF_T long)
set(CURL_SIZEOF_CURL_OFF_T 8)
set(CURL_FORMAT_CURL_OFF_T "ld")
set(CURL_FORMAT_CURL_OFF_TU "lu")
set(CURL_FORMAT_OFF_T "%ld")
set(CURL_SUFFIX_CURL_OFF_T L)
set(CURL_SUFFIX_CURL_OFF_TU LU)
endif(SIZEOF_LONG EQUAL 8)
if(SIZEOF_LONG_LONG EQUAL 8)
set(CURL_TYPEOF_CURL_OFF_T "long long")
set(CURL_SIZEOF_CURL_OFF_T 8)
set(CURL_FORMAT_CURL_OFF_T "lld")
set(CURL_FORMAT_CURL_OFF_TU "llu")
set(CURL_FORMAT_OFF_T "%lld")
set(CURL_SUFFIX_CURL_OFF_T LL)
set(CURL_SUFFIX_CURL_OFF_TU LLU)
endif(SIZEOF_LONG_LONG EQUAL 8)
if(NOT CURL_TYPEOF_CURL_OFF_T)
set(CURL_TYPEOF_CURL_OFF_T ${ssize_t})
set(CURL_SIZEOF_CURL_OFF_T ${SIZEOF_SSIZE_T})
# TODO: need adjustment here.
set(CURL_FORMAT_CURL_OFF_T "ld")
set(CURL_FORMAT_CURL_OFF_TU "lu")
set(CURL_FORMAT_OFF_T "%ld")
set(CURL_SUFFIX_CURL_OFF_T L)
set(CURL_SUFFIX_CURL_OFF_TU LU)
endif(NOT CURL_TYPEOF_CURL_OFF_T)
if(HAVE_SIZEOF_LONG_LONG)
set(HAVE_LONGLONG 1)
set(HAVE_LL 1)
endif(HAVE_SIZEOF_LONG_LONG)
find_file(RANDOM_FILE urandom /dev)
mark_as_advanced(RANDOM_FILE)
# Check for some functions that are used
check_symbol_exists(basename "${CURL_INCLUDES}" HAVE_BASENAME)
check_symbol_exists(socket "${CURL_INCLUDES}" HAVE_SOCKET)
check_symbol_exists(poll "${CURL_INCLUDES}" HAVE_POLL)
check_symbol_exists(select "${CURL_INCLUDES}" HAVE_SELECT)
check_symbol_exists(strdup "${CURL_INCLUDES}" HAVE_STRDUP)
check_symbol_exists(strstr "${CURL_INCLUDES}" HAVE_STRSTR)
check_symbol_exists(strtok_r "${CURL_INCLUDES}" HAVE_STRTOK_R)
check_symbol_exists(strftime "${CURL_INCLUDES}" HAVE_STRFTIME)
check_symbol_exists(uname "${CURL_INCLUDES}" HAVE_UNAME)
check_symbol_exists(strcasecmp "${CURL_INCLUDES}" HAVE_STRCASECMP)
check_symbol_exists(stricmp "${CURL_INCLUDES}" HAVE_STRICMP)
check_symbol_exists(strcmpi "${CURL_INCLUDES}" HAVE_STRCMPI)
check_symbol_exists(strncmpi "${CURL_INCLUDES}" HAVE_STRNCMPI)
check_symbol_exists(alarm "${CURL_INCLUDES}" HAVE_ALARM)
if(NOT HAVE_STRNCMPI)
set(HAVE_STRCMPI)
endif(NOT HAVE_STRNCMPI)
check_symbol_exists(gethostbyaddr "${CURL_INCLUDES}" HAVE_GETHOSTBYADDR)
check_symbol_exists(gethostbyaddr_r "${CURL_INCLUDES}" HAVE_GETHOSTBYADDR_R)
check_symbol_exists(gettimeofday "${CURL_INCLUDES}" HAVE_GETTIMEOFDAY)
check_symbol_exists(inet_addr "${CURL_INCLUDES}" HAVE_INET_ADDR)
check_symbol_exists(inet_ntoa "${CURL_INCLUDES}" HAVE_INET_NTOA)
check_symbol_exists(inet_ntoa_r "${CURL_INCLUDES}" HAVE_INET_NTOA_R)
check_symbol_exists(tcsetattr "${CURL_INCLUDES}" HAVE_TCSETATTR)
check_symbol_exists(tcgetattr "${CURL_INCLUDES}" HAVE_TCGETATTR)
check_symbol_exists(perror "${CURL_INCLUDES}" HAVE_PERROR)
check_symbol_exists(closesocket "${CURL_INCLUDES}" HAVE_CLOSESOCKET)
check_symbol_exists(setvbuf "${CURL_INCLUDES}" HAVE_SETVBUF)
check_symbol_exists(sigsetjmp "${CURL_INCLUDES}" HAVE_SIGSETJMP)
check_symbol_exists(getpass_r "${CURL_INCLUDES}" HAVE_GETPASS_R)
check_symbol_exists(strlcat "${CURL_INCLUDES}" HAVE_STRLCAT)
check_symbol_exists(getpwuid "${CURL_INCLUDES}" HAVE_GETPWUID)
check_symbol_exists(geteuid "${CURL_INCLUDES}" HAVE_GETEUID)
check_symbol_exists(utime "${CURL_INCLUDES}" HAVE_UTIME)
if(CMAKE_USE_OPENSSL)
check_symbol_exists(RAND_status "${CURL_INCLUDES}" HAVE_RAND_STATUS)
check_symbol_exists(RAND_screen "${CURL_INCLUDES}" HAVE_RAND_SCREEN)
check_symbol_exists(RAND_egd "${CURL_INCLUDES}" HAVE_RAND_EGD)
check_symbol_exists(CRYPTO_cleanup_all_ex_data "${CURL_INCLUDES}"
HAVE_CRYPTO_CLEANUP_ALL_EX_DATA)
if(HAVE_LIBCRYPTO AND HAVE_LIBSSL)
set(USE_OPENSSL 1)
set(USE_SSLEAY 1)
endif(HAVE_LIBCRYPTO AND HAVE_LIBSSL)
endif(CMAKE_USE_OPENSSL)
check_symbol_exists(gmtime_r "${CURL_INCLUDES}" HAVE_GMTIME_R)
check_symbol_exists(localtime_r "${CURL_INCLUDES}" HAVE_LOCALTIME_R)
check_symbol_exists(gethostbyname "${CURL_INCLUDES}" HAVE_GETHOSTBYNAME)
check_symbol_exists(gethostbyname_r "${CURL_INCLUDES}" HAVE_GETHOSTBYNAME_R)
check_symbol_exists(signal "${CURL_INCLUDES}" HAVE_SIGNAL_FUNC)
check_symbol_exists(SIGALRM "${CURL_INCLUDES}" HAVE_SIGNAL_MACRO)
if(HAVE_SIGNAL_FUNC AND HAVE_SIGNAL_MACRO)
set(HAVE_SIGNAL 1)
endif(HAVE_SIGNAL_FUNC AND HAVE_SIGNAL_MACRO)
check_symbol_exists(uname "${CURL_INCLUDES}" HAVE_UNAME)
check_symbol_exists(strtoll "${CURL_INCLUDES}" HAVE_STRTOLL)
check_symbol_exists(_strtoi64 "${CURL_INCLUDES}" HAVE__STRTOI64)
check_symbol_exists(strerror_r "${CURL_INCLUDES}" HAVE_STRERROR_R)
check_symbol_exists(siginterrupt "${CURL_INCLUDES}" HAVE_SIGINTERRUPT)
check_symbol_exists(perror "${CURL_INCLUDES}" HAVE_PERROR)
check_symbol_exists(fork "${CURL_INCLUDES}" HAVE_FORK)
check_symbol_exists(freeaddrinfo "${CURL_INCLUDES}" HAVE_FREEADDRINFO)
check_symbol_exists(freeifaddrs "${CURL_INCLUDES}" HAVE_FREEIFADDRS)
check_symbol_exists(pipe "${CURL_INCLUDES}" HAVE_PIPE)
check_symbol_exists(ftruncate "${CURL_INCLUDES}" HAVE_FTRUNCATE)
check_symbol_exists(getprotobyname "${CURL_INCLUDES}" HAVE_GETPROTOBYNAME)
check_symbol_exists(getrlimit "${CURL_INCLUDES}" HAVE_GETRLIMIT)
check_symbol_exists(idn_free "${CURL_INCLUDES}" HAVE_IDN_FREE)
check_symbol_exists(idna_strerror "${CURL_INCLUDES}" HAVE_IDNA_STRERROR)
check_symbol_exists(tld_strerror "${CURL_INCLUDES}" HAVE_TLD_STRERROR)
check_symbol_exists(setlocale "${CURL_INCLUDES}" HAVE_SETLOCALE)
check_symbol_exists(setrlimit "${CURL_INCLUDES}" HAVE_SETRLIMIT)
check_symbol_exists(fcntl "${CURL_INCLUDES}" HAVE_FCNTL)
check_symbol_exists(ioctl "${CURL_INCLUDES}" HAVE_IOCTL)
check_symbol_exists(setsockopt "${CURL_INCLUDES}" HAVE_SETSOCKOPT)
# symbol exists in win32, but function does not.
check_function_exists(inet_pton HAVE_INET_PTON)
# sigaction and sigsetjmp are special. Use special mechanism for
# detecting those, but only if previous attempt failed.
if(HAVE_SIGNAL_H)
check_symbol_exists(sigaction "signal.h" HAVE_SIGACTION)
endif(HAVE_SIGNAL_H)
if(NOT HAVE_SIGSETJMP)
if(HAVE_SETJMP_H)
check_symbol_exists(sigsetjmp "setjmp.h" HAVE_MACRO_SIGSETJMP)
if(HAVE_MACRO_SIGSETJMP)
set(HAVE_SIGSETJMP 1)
endif(HAVE_MACRO_SIGSETJMP)
endif(HAVE_SETJMP_H)
endif(NOT HAVE_SIGSETJMP)
# If there is no stricmp(), do not allow LDAP to parse URLs
if(NOT HAVE_STRICMP)
set(HAVE_LDAP_URL_PARSE 1)
endif(NOT HAVE_STRICMP)
# For other curl specific tests, use this macro.
macro(CURL_INTERNAL_TEST CURL_TEST)
if("${CURL_TEST}" MATCHES "^${CURL_TEST}$")
set(MACRO_CHECK_FUNCTION_DEFINITIONS
"-D${CURL_TEST} ${CURL_TEST_DEFINES} ${CMAKE_REQUIRED_FLAGS}")
if(CMAKE_REQUIRED_LIBRARIES)
set(CURL_TEST_ADD_LIBRARIES
"-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
endif(CMAKE_REQUIRED_LIBRARIES)
message(STATUS "Performing Curl Test ${CURL_TEST}")
try_compile(${CURL_TEST}
${CMAKE_BINARY_DIR}
${CMAKE_CURRENT_SOURCE_DIR}/CMake/CurlTests.c
CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
"${CURL_TEST_ADD_LIBRARIES}"
OUTPUT_VARIABLE OUTPUT)
if(${CURL_TEST})
set(${CURL_TEST} 1 CACHE INTERNAL "Curl test ${FUNCTION}")
message(STATUS "Performing Curl Test ${CURL_TEST} - Success")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"Performing Curl Test ${CURL_TEST} passed with the following output:\n"
"${OUTPUT}\n")
else(${CURL_TEST})
message(STATUS "Performing Curl Test ${CURL_TEST} - Failed")
set(${CURL_TEST} "" CACHE INTERNAL "Curl test ${FUNCTION}")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
"Performing Curl Test ${CURL_TEST} failed with the following output:\n"
"${OUTPUT}\n")
endif(${CURL_TEST})
endif("${CURL_TEST}" MATCHES "^${CURL_TEST}$")
endmacro(CURL_INTERNAL_TEST)
macro(CURL_INTERNAL_TEST_RUN CURL_TEST)
if("${CURL_TEST}_COMPILE" MATCHES "^${CURL_TEST}_COMPILE$")
set(MACRO_CHECK_FUNCTION_DEFINITIONS
"-D${CURL_TEST} ${CMAKE_REQUIRED_FLAGS}")
if(CMAKE_REQUIRED_LIBRARIES)
set(CURL_TEST_ADD_LIBRARIES
"-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
endif(CMAKE_REQUIRED_LIBRARIES)
message(STATUS "Performing Curl Test ${CURL_TEST}")
try_run(${CURL_TEST} ${CURL_TEST}_COMPILE
${CMAKE_BINARY_DIR}
${CMAKE_CURRENT_SOURCE_DIR}/CMake/CurlTests.c
CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
"${CURL_TEST_ADD_LIBRARIES}"
OUTPUT_VARIABLE OUTPUT)
if(${CURL_TEST}_COMPILE AND NOT ${CURL_TEST})
set(${CURL_TEST} 1 CACHE INTERNAL "Curl test ${FUNCTION}")
message(STATUS "Performing Curl Test ${CURL_TEST} - Success")
else(${CURL_TEST}_COMPILE AND NOT ${CURL_TEST})
message(STATUS "Performing Curl Test ${CURL_TEST} - Failed")
set(${CURL_TEST} "" CACHE INTERNAL "Curl test ${FUNCTION}")
file(APPEND "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log"
"Performing Curl Test ${CURL_TEST} failed with the following output:\n"
"${OUTPUT}")
if(${CURL_TEST}_COMPILE)
file(APPEND
"${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log"
"There was a problem running this test\n")
endif(${CURL_TEST}_COMPILE)
file(APPEND "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log"
"\n\n")
endif(${CURL_TEST}_COMPILE AND NOT ${CURL_TEST})
endif("${CURL_TEST}_COMPILE" MATCHES "^${CURL_TEST}_COMPILE$")
endmacro(CURL_INTERNAL_TEST_RUN)
# Do curl specific tests
foreach(CURL_TEST
HAVE_FCNTL_O_NONBLOCK
HAVE_IOCTLSOCKET
HAVE_IOCTLSOCKET_CAMEL
HAVE_IOCTLSOCKET_CAMEL_FIONBIO
HAVE_IOCTLSOCKET_FIONBIO
HAVE_IOCTL_FIONBIO
HAVE_IOCTL_SIOCGIFADDR
HAVE_SETSOCKOPT_SO_NONBLOCK
HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
TIME_WITH_SYS_TIME
HAVE_O_NONBLOCK
HAVE_GETHOSTBYADDR_R_5
HAVE_GETHOSTBYADDR_R_7
HAVE_GETHOSTBYADDR_R_8
HAVE_GETHOSTBYADDR_R_5_REENTRANT
HAVE_GETHOSTBYADDR_R_7_REENTRANT
HAVE_GETHOSTBYADDR_R_8_REENTRANT
HAVE_GETHOSTBYNAME_R_3
HAVE_GETHOSTBYNAME_R_5
HAVE_GETHOSTBYNAME_R_6
HAVE_GETHOSTBYNAME_R_3_REENTRANT
HAVE_GETHOSTBYNAME_R_5_REENTRANT
HAVE_GETHOSTBYNAME_R_6_REENTRANT
HAVE_SOCKLEN_T
HAVE_IN_ADDR_T
HAVE_BOOL_T
STDC_HEADERS
RETSIGTYPE_TEST
HAVE_INET_NTOA_R_DECL
HAVE_INET_NTOA_R_DECL_REENTRANT
HAVE_GETADDRINFO
HAVE_FILE_OFFSET_BITS
)
curl_internal_test(${CURL_TEST})
endforeach(CURL_TEST)
if(HAVE_FILE_OFFSET_BITS)
set(_FILE_OFFSET_BITS 64)
endif(HAVE_FILE_OFFSET_BITS)
foreach(CURL_TEST
HAVE_GLIBC_STRERROR_R
HAVE_POSIX_STRERROR_R
)
curl_internal_test_run(${CURL_TEST})
endforeach(CURL_TEST)
# Check for reentrant
foreach(CURL_TEST
HAVE_GETHOSTBYADDR_R_5
HAVE_GETHOSTBYADDR_R_7
HAVE_GETHOSTBYADDR_R_8
HAVE_GETHOSTBYNAME_R_3
HAVE_GETHOSTBYNAME_R_5
HAVE_GETHOSTBYNAME_R_6
HAVE_INET_NTOA_R_DECL_REENTRANT)
if(NOT ${CURL_TEST})
if(${CURL_TEST}_REENTRANT)
set(NEED_REENTRANT 1)
endif(${CURL_TEST}_REENTRANT)
endif(NOT ${CURL_TEST})
endforeach(CURL_TEST)
if(NEED_REENTRANT)
foreach(CURL_TEST
HAVE_GETHOSTBYADDR_R_5
HAVE_GETHOSTBYADDR_R_7
HAVE_GETHOSTBYADDR_R_8
HAVE_GETHOSTBYNAME_R_3
HAVE_GETHOSTBYNAME_R_5
HAVE_GETHOSTBYNAME_R_6)
set(${CURL_TEST} 0)
if(${CURL_TEST}_REENTRANT)
set(${CURL_TEST} 1)
endif(${CURL_TEST}_REENTRANT)
endforeach(CURL_TEST)
endif(NEED_REENTRANT)
if(HAVE_INET_NTOA_R_DECL_REENTRANT)
set(HAVE_INET_NTOA_R_DECL 1)
set(NEED_REENTRANT 1)
endif(HAVE_INET_NTOA_R_DECL_REENTRANT)
# Some other minor tests
if(NOT HAVE_IN_ADDR_T)
set(in_addr_t "unsigned long")
endif(NOT HAVE_IN_ADDR_T)
# Fix libz / zlib.h
if(NOT CURL_SPECIAL_LIBZ)
if(NOT HAVE_LIBZ)
set(HAVE_ZLIB_H 0)
endif(NOT HAVE_LIBZ)
if(NOT HAVE_ZLIB_H)
set(HAVE_LIBZ 0)
endif(NOT HAVE_ZLIB_H)
endif(NOT CURL_SPECIAL_LIBZ)
if(_FILE_OFFSET_BITS)
set(_FILE_OFFSET_BITS 64)
endif(_FILE_OFFSET_BITS)
set(CMAKE_REQUIRED_FLAGS "-D_FILE_OFFSET_BITS=64")
set(CMAKE_EXTRA_INCLUDE_FILES "${CMAKE_CURRENT_SOURCE_DIR}/curl/curl.h")
check_type_size("curl_off_t" SIZEOF_CURL_OFF_T)
set(CMAKE_EXTRA_INCLUDE_FILES)
set(CMAKE_REQUIRED_FLAGS)
# Check for nonblocking
set(HAVE_DISABLED_NONBLOCKING 1)
if(HAVE_FIONBIO OR
HAVE_IOCTLSOCKET OR
HAVE_IOCTLSOCKET_CASE OR
HAVE_O_NONBLOCK)
set(HAVE_DISABLED_NONBLOCKING)
endif(HAVE_FIONBIO OR
HAVE_IOCTLSOCKET OR
HAVE_IOCTLSOCKET_CASE OR
HAVE_O_NONBLOCK)
if(RETSIGTYPE_TEST)
set(RETSIGTYPE void)
else(RETSIGTYPE_TEST)
set(RETSIGTYPE int)
endif(RETSIGTYPE_TEST)
if(CMAKE_COMPILER_IS_GNUCC AND APPLE)
include(CheckCCompilerFlag)
check_c_compiler_flag(-Wno-long-double HAVE_C_FLAG_Wno_long_double)
if(HAVE_C_FLAG_Wno_long_double)
# The Mac version of GCC warns about use of long double. Disable it.
get_source_file_property(MPRINTF_COMPILE_FLAGS mprintf.c COMPILE_FLAGS)
if(MPRINTF_COMPILE_FLAGS)
set(MPRINTF_COMPILE_FLAGS "${MPRINTF_COMPILE_FLAGS} -Wno-long-double")
else(MPRINTF_COMPILE_FLAGS)
set(MPRINTF_COMPILE_FLAGS "-Wno-long-double")
endif(MPRINTF_COMPILE_FLAGS)
set_source_files_properties(mprintf.c PROPERTIES
COMPILE_FLAGS ${MPRINTF_COMPILE_FLAGS})
endif(HAVE_C_FLAG_Wno_long_double)
endif(CMAKE_COMPILER_IS_GNUCC AND APPLE)
if(HAVE_SOCKLEN_T)
set(CURL_TYPEOF_CURL_SOCKLEN_T "socklen_t")
check_type_size("socklen_t" CURL_SIZEOF_CURL_SOCKLEN_T)
if(NOT HAVE_CURL_SIZEOF_CURL_SOCKLEN_T)
message(FATAL_ERROR
"Check for sizeof socklen_t failed, see CMakeFiles/CMakerror.log")
endif()
else()
set(CURL_TYPEOF_CURL_SOCKLEN_T int)
set(CURL_SIZEOF_CURL_SOCKLEN_T ${SIZEOF_INT})
endif()
include(CMake/OtherTests.cmake)
add_definitions(-DHAVE_CONFIG_H)
# For windows, do not allow the compiler to use default target (Vista).
if(WIN32)
add_definitions(-D_WIN32_WINNT=0x0501)
endif(WIN32)
if(MSVC)
add_definitions(-D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE)
endif(MSVC)
# Sets up the dependencies (zlib, OpenSSL, etc.) of a cURL subproject according to options.
# TODO This is far to be complete!
function(SETUP_CURL_DEPENDENCIES TARGET_NAME)
if(CURL_ZLIB AND ZLIB_FOUND)
include_directories(${ZLIB_INCLUDE_DIR})
endif()
if(CURL_ZLIB AND ZLIB_FOUND)
target_link_libraries(${TARGET_NAME} ${ZLIB_LIBRARIES})
#ADD_DEFINITIONS( -DHAVE_ZLIB_H -DHAVE_ZLIB -DHAVE_LIBZ )
endif()
if(CMAKE_USE_OPENSSL AND OPENSSL_FOUND)
include_directories(${OPENSSL_INCLUDE_DIR})
endif()
if(CMAKE_USE_OPENSSL AND CURL_CONFIG_HAS_BEEN_RUN_BEFORE)
target_link_libraries(${TARGET_NAME} ${OPENSSL_LIBRARIES})
#ADD_DEFINITIONS( -DUSE_SSLEAY )
endif()
endfunction()
# Ugly (but functional) way to include "Makefile.inc" by transforming it (= regenerate it).
function(TRANSFORM_MAKEFILE_INC INPUT_FILE OUTPUT_FILE)
file(READ ${INPUT_FILE} MAKEFILE_INC_TEXT)
string(REPLACE "$(top_srcdir)" "\${CURL_SOURCE_DIR}" MAKEFILE_INC_TEXT ${MAKEFILE_INC_TEXT})
string(REPLACE "$(top_builddir)" "\${CURL_BINARY_DIR}" MAKEFILE_INC_TEXT ${MAKEFILE_INC_TEXT})
string(REGEX REPLACE "\\\\\n" "<22>!<21>" MAKEFILE_INC_TEXT ${MAKEFILE_INC_TEXT})
string(REGEX REPLACE "([a-zA-Z_][a-zA-Z0-9_]*)[\t ]*=[\t ]*([^\n]*\n)" "SET(\\1 \\2)\n" MAKEFILE_INC_TEXT ${MAKEFILE_INC_TEXT})
string(REPLACE "<22>!<21>" "\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()
add_subdirectory(lib)
if(BUILD_CURL_EXE)
add_subdirectory(src)
endif()
if(BUILD_CURL_TESTS)
add_subdirectory(tests)
endif()
# This needs to be run very last so other parts of the scripts can take advantage of this.
if(NOT CURL_CONFIG_HAS_BEEN_RUN_BEFORE)
set(CURL_CONFIG_HAS_BEEN_RUN_BEFORE 1 CACHE INTERNAL "Flag to track whether this is the first time running CMake or if CMake has been configured before")
endif()