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if(APPLE)
include(port/Darwin)
elseif(WIN32)
include(port/Windows)
elseif(EMSCRIPTEN)
include(port/Emscripten)
elseif(ANDROID)
include(port/Android)
endif()
# Architecture id (Prolog flag `arch`, architecture subdirs)
if(NOT SWIPL_ARCH)
string(TOLOWER ${CMAKE_HOST_SYSTEM_PROCESSOR}-${CMAKE_HOST_SYSTEM_NAME}
SWIPL_ARCH)
endif()
# Setup cross compiling. As discussed with _erlanger_ in
# https://github.com/SWI-Prolog/swipl-devel/issues/358#issuecomment-439675854
# we distinguish three scenarios for building:
#
# 1. Native compilation
# 2. Cross compilation with a good emulator (Wine for Windows, Node.js
# for WASM)
# 3. Cross compilation without a usable emulator.
#
# In case #3 we need to make two builds:
# 1. Compile SWI-Prolog on the build host with a compatible pointer size
# 2. Cross-compile to the final target
#
# The first step is used to produce build artifacts that are needed
# by the cross-compilation step. SWIPL_NATIVE_FRIEND points to the directory
# which contains the build for step #1.
#
# ${SWIPL_NATIVE_FRIEND}, is either the name of a sibling build
# directory containing a compatible native SWI-Prolog or an absolute path
# pointing at such a directory. By compatible we mean that the pointer size
# is the same.
#
# The following variables are set, and can be used elsewhere:
#
# - ${PROG_SWIPL} is a native or friend Prolog executable that can
# be used for general Prolog tasks such as generating
# the library index or documentation
#
# - ${PROG_SWIPL_FOR_BOOT} is a native or friend Prolog executable that can
# be used for compiling boot.prc and .qlf files.
# These used to be platform specific. Now,
# ${PROG_SWIPL} should do. We keep a separate
# variable for the time being.
#
# Note: The helper tools mkvmi and defatoms (see src directory) are built
# using ${CMAKE_HOST_CC} when cross-compiling, and do not need SWIPL_NATIVE_FRIEND.
if(CMAKE_CROSSCOMPILING)
set(CMAKE_HOST_EXECUTABLE_SUFFIX "" CACHE STRING
"File name extension for executables for the host")
set(CMAKE_HOST_CC cc CACHE STRING
"C compiler used to compile build tools while cross-compiling")
set(SWIPL_NATIVE_FRIEND "" CACHE STRING
"CMake binary directory holding a compatible native system")
if(SWIPL_NATIVE_FRIEND)
if(IS_ABSOLUTE ${SWIPL_NATIVE_FRIEND})
set(SWIPL_NATIVE_FRIEND_DIR ${SWIPL_NATIVE_FRIEND})
else()
set(SWIPL_NATIVE_FRIEND_DIR ${CMAKE_SOURCE_DIR}/${SWIPL_NATIVE_FRIEND})
endif()
set(PROG_SWIPL
${SWIPL_NATIVE_FRIEND_DIR}/src/swipl${CMAKE_HOST_EXECUTABLE_SUFFIX}
CACHE STRING "SWI-Prolog executable to perform build tasks")
set(PROG_SWIPL_FOR_BOOT ${PROG_SWIPL})
else()
set(PROG_SWIPL_TARGET_FILE $<TARGET_FILE:swipl>
CACHE STRING "SWI-Prolog executable to perform build tasks")
set(PROG_SWIPL ${CMAKE_CROSSCOMPILING_EMULATOR} ${PROG_SWIPL_TARGET_FILE})
set(PROG_SWIPL_FOR_BOOT ${PROG_SWIPL})
endif()
else(CMAKE_CROSSCOMPILING)
set(CMAKE_HOST_EXECUTABLE_SUFFIX ${CMAKE_EXECUTABLE_SUFFIX})
set(PROG_SWIPL $<TARGET_FILE:swipl>)
set(PROG_SWIPL_FOR_BOOT ${PROG_SWIPL})
endif(CMAKE_CROSSCOMPILING)
################
# Misc tests
include(CheckFloatingPointFormat)
include(TestBigEndian)
TEST_BIG_ENDIAN(WORDS_BIGENDIAN)
ub_check_floating_point_format(IEEE754_FLOATS FLOAT_BYTES_BIGENDIAN FLOAT_WORDS_BIGENDIAN)
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