PUT results from the CPAN

Alien-cares

CMAKE_MINIMUM_REQUIRED (VERSION 3.0.2)

INCLUDE (CheckIncludeFiles)
INCLUDE (CheckTypeSize)
INCLUDE (CheckFunctionExists)
INCLUDE (CheckSymbolExists)
INCLUDE (CheckCSourceCompiles)
INCLUDE (CheckStructHasMember)
INCLUDE (CheckLibraryExists)
INCLUDE (GNUInstallDirs)

PROJECT (c-ares C)

# Set this version before release
SET (CARES_VERSION "1.15.0")

# 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 "5:0:3")


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)
OPTION (CARES_BUILD_TESTS "Build and run tests"                                                  OFF)
OPTION (CARES_BUILD_TOOLS "Build tools"                                                          ON)

# 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
	RUNTIME DESTINATION  ${CMAKE_INSTALL_BINDIR}
	LIBRARY DESTINATION  ${CMAKE_INSTALL_LIBDIR}
	ARCHIVE DESTINATION  ${CMAKE_INSTALL_LIBDIR}
	INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
)

# 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>
	int main() {
#if TARGET_OS_IPHONE == 0
#error Not an iPhone target
#endif
return 0;
	}
	"
	IOS)

	CHECK_C_SOURCE_COMPILES ("
#include <stdio.h>
#include <TargetConditionals.h>
	int main() {
#if TARGET_OS_IPHONE == 0 || __IPHONE_OS_VERSION_MIN_REQUIRED < 100000
#  error Not iOS v10
#endif
return 0;
	}
	"
	IOS_V10)

	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
	int main() {
#if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
#  error Not MacOSX 10.12 or higher
#endif
return 0;
	}
	"
	MACOS_V1012)
ENDIF ()

IF (IOS AND HAVE_LIBRESOLV)
	SET (CARES_USE_LIBRESOLV 1)
ENDIF()

libcares/CMakeLists.txt view on Meta::CPAN

	ELSE ()
		# Probably linux
		SET (GETSERVBYPORT_R_ARGS 6)
	ENDIF ()
ENDIF ()

IF (HAVE_GETSERVBYNAME_R)
	# TODO : Should probably autodetect
	IF (CMAKE_SYSTEM_NAME STREQUAL "SunOS")
		SET (GETSERVBYNAME_R_ARGS 5)
	ELSEIF (CMAKE_SYSTEM_NAME STREQUAL "AIX" OR
		CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
		SET (GETSERVBYNAME_R_ARGS 4)
	ELSE ()
		# Probably linux
		SET (GETSERVBYNAME_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" "ÃŸ!ÃŸ" 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 "ÃŸ!ÃŸ" "\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 (${PROJECT_NAME} PROPERTIES
		EXPORT_NAME cares
		OUTPUT_NAME cares
		VERSION     "${CARES_LIB_VERSION_MAJOR}.${CARES_LIB_VERSION_MINOR}.${CARES_LIB_VERSION_RELEASE}"
		SOVERSION   "${CARES_LIB_VERSION_MAJOR}"
	)

	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
			${TARGETS_INST_DEST}
		)
	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 (${LIBNAME} PROPERTIES
		EXPORT_NAME cares${STATIC_SUFFIX}
		OUTPUT_NAME cares${STATIC_SUFFIX}
	)

	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}
		PUBLIC  CARES_STATICLIB
		PRIVATE HAVE_CONFIG_H=1
	)

	TARGET_LINK_LIBRARIES (${LIBNAME} PUBLIC ${CARES_DEPENDENT_LIBS})
	IF (CARES_INSTALL)
		INSTALL (TARGETS ${LIBNAME} EXPORT ${PROJECT_NAME}-targets
			${TARGETS_INST_DEST}
		)
	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 ()

IF (CARES_BUILD_TESTS)
	ENABLE_TESTING ()
	ADD_SUBDIRECTORY (test)
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
		INSTALL_DESTINATION ${CMAKECONFIG_INSTALL_DIR}
		PATH_VARS CMAKE_INSTALL_INCLUDEDIR
		NO_CHECK_REQUIRED_COMPONENTS_MACRO
	)
	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})

	# pkgconfig support
	IF (NOT CARES_SHARED)
		SET (CPPFLAG_CARES_STATICLIB "-DCARES_STATICLIB")
		FOREACH (LIB ${CARES_DEPENDENT_LIBS})
			SET (CARES_PRIVATE_LIBS "${CARES_PRIVATE_LIBS} -l${LIB}")
		ENDFOREACH ()
	ENDIF ()
	CONFIGURE_FILE("libcares.pc.cmake" "libcares.pc" @ONLY)

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