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#
# Perform operating-system specific configuration.
#
if (${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
set(TARGET_OS_LINUX 1)
#
# Enable GNU glibc extentions.
add_definitions("-D_GNU_SOURCE")
#
# On 32-bit systems, support files larger than 2GB
# (see man page for feature_test_macros).
add_definitions("-D_FILE_OFFSET_BITS=64")
find_package_message(PLATFORM "Building for Linux" "${CMAKE_SYSTEM_NAME}")
elseif (${CMAKE_SYSTEM_NAME} STREQUAL "kFreeBSD")
set(TARGET_OS_FREEBSD 1)
set(TARGET_OS_DEBIAN_FREEBSD 1)
# Debian/kFreeBSD uses GNU glibc.
add_definitions("-D_GNU_SOURCE")
add_definitions("-D_FILE_OFFSET_BITS=64")
find_package_message(PLATFORM "Building for Debian/kFreeBSD"
"${CMAKE_SYSTEM_NAME}")
elseif (${CMAKE_SYSTEM_NAME} STREQUAL "FreeBSD")
set(TARGET_OS_FREEBSD 1)
find_package_message(PLATFORM "Building for FreeBSD" "${CMAKE_SYSTEM_NAME}")
elseif (${CMAKE_SYSTEM_NAME} STREQUAL "Darwin")
set(TARGET_OS_DARWIN 1)
#
# Default build type is None, which uses depends by Apple
# command line tools. Also supportting install with MacPorts.
#
if (NOT DARWIN_BUILD_TYPE)
set(DARWIN_BUILD_TYPE None CACHE STRING
"Choose the type of Darwin build, options are: None, Ports."
FORCE)
endif()
if (${DARWIN_BUILD_TYPE} STREQUAL "Ports")
# Mac ports get installed into /opt/local, hence:
include_directories("/opt/local/include")
set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -L/opt/local/lib")
endif()
find_package_message(PLATFORM "Building for OS X" "${CMAKE_SYSTEM_NAME}")
find_package_message(DARWIN_BUILD_TYPE
"DARWIN_BUILD_TYPE: ${DARWIN_BUILD_TYPE}" "${DARWIN_BUILD_TYPE}")
# In Mac OS, the dynamic linker recognizes
# @loader_path, @executable_path and @rpath tokens, ex:
# '@loder_path/lit.dylib'
# means load lit from the same dir the requesting binary lives in.
# Since our dynamic libraries aren't intended for static linking,
# this is pretty much irrelevant. Disable CMake rpath features
# altogether. Suppresses a few warnings.
set(CMAKE_SKIP_RPATH true)
# Latest versions of Homebrew wont 'link --force' for libraries, that were
# preinstalled in system. So we'll use this dirty hack
find_program(HOMEBREW_EXECUTABLE brew)
if(EXISTS ${HOMEBREW_EXECUTABLE})
execute_process(COMMAND ${HOMEBREW_EXECUTABLE} --prefix
OUTPUT_VARIABLE HOMEBREW_PREFIX
OUTPUT_STRIP_TRAILING_WHITESPACE)
message(STATUS "Detected Homebrew install at ${HOMEBREW_PREFIX}")
# Detecting LibReadline
execute_process(COMMAND ${HOMEBREW_EXECUTABLE} --prefix readline
OUTPUT_VARIABLE HOMEBREW_READLINE
OUTPUT_STRIP_TRAILING_WHITESPACE)
if(DEFINED HOMEBREW_READLINE)
if (NOT DEFINED READLINE_ROOT)
message(STATUS "Setting readline root to ${HOMEBREW_READLINE}")
set(READLINE_ROOT "${HOMEBREW_READLINE}")
endif()
elseif(NOT DEFINED ${READLINE_ROOT})
message(WARNING "Homebrew's readline isn't installed. "
"Work isn't guarenteed using system readline")
endif()
# Detecting OpenSSL
execute_process(COMMAND ${HOMEBREW_EXECUTABLE} --prefix openssl
OUTPUT_VARIABLE HOMEBREW_OPENSSL
OUTPUT_STRIP_TRAILING_WHITESPACE)
if (DEFINED HOMEBREW_OPENSSL)
if (NOT DEFINED OPENSSL_ROOT_DIR)
message(STATUS "Setting OpenSSL root to ${HOMEBREW_OPENSSL}")
set(OPENSSL_ROOT_DIR "${HOMEBREW_OPENSSL}")
endif()
elseif(NOT DEFINED OPENSSL_ROOT_DIR)
message(WARNING "Homebrew's OpenSSL isn't installed. Work isn't "
"guarenteed if built with system OpenSSL")
endif()
endif()
else()
message (FATAL_ERROR "Unsupported platform -- ${CMAKE_SYSTEM_NAME}")
endif()
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