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DetectDefaults.cmake
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# Script MIT-licensed
# Copyright 2011 Iowa State University.
#
#Permission is hereby granted, free of charge, to any person obtaining a
#copy of this software and associated documentation files (the
#"Software"), to deal in the Software without restriction, including
#without limitation the rights to use, copy, modify, merge, publish,
#distribute, sublicense, and/or sell copies of the Software, and to
#permit persons to whom the Software is furnished to do so, subject to
#the following conditions:
#The above copyright notice and this permission notice shall be included
#in all copies or substantial portions of the Software.
#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
#OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
#MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
#IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
#CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
#TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
#SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
# Called by default setting routines that need the basic gcc to do their work,
# so we don't require this unless necessary.
function(get_gcc_to_detect VARNAME)
if(CMAKE_COMPILER_IS_GNUCXX)
set(PATH64_GCC_EXECUTABLE "${CMAKE_C_COMPILER}")
set(PATH64_GCC_EXECUTABLE "${PATH64_GCC_EXECUTABLE}" CACHE FILEPATH "Path to gcc" FORCE)
else()
find_program(PATH64_GCC_EXECUTABLE gcc)
endif()
if(NOT EXISTS "${PATH64_GCC_EXECUTABLE}")
message(SEND_ERROR "No file exists at path given for gcc '${PATH64_GCC_EXECUTABLE}'.")
set(PATH64_GCC_EXECUTABLE NOTFOUND)
set(PATH64_GCC_EXECUTABLE "${PATH64_GCC_EXECUTABLE}" CACHE FILEPATH "Path to gcc" FORCE)
endif()
if(PATH64_GCC_EXECUTABLE)
mark_as_advanced(PATH64_GCC_EXECUTABLE)
else()
message(SEND_ERROR "Could not find GCC - won't be able to automatically set variable '${VARNAME}'.")
endif()
endfunction()
# Called by default setting routines that need the machine-gcc to do their work,
# so we don't require this unless necessary.
function(get_machine_gcc_to_detect VARNAME)
get_gcc_to_detect(${VARNAME})
if(NOT PSC_MACHINE)
message(SEND_ERROR "PSC_MACHINE not set, so can't set PATH64_MACHINE_GCC_EXECUTABLE which is needed for ${VARNAME}")
else()
if(PATH64_GCC_EXECUTABLE)
get_filename_component(_gcc_dir "${PATH64_GCC_EXECUTABLE}" PATH)
endif()
find_program(PATH64_MACHINE_GCC_EXECUTABLE
${PSC_MACHINE}-gcc
PATHS ${_gcc_dir})
if(PATH64_MACHINE_GCC_EXECUTABLE)
mark_as_advanced(PATH64_MACHINE_GCC_EXECUTABLE)
else()
message(SEND_ERROR "Could not find GCC for ${PSC_MACHINE} - won't be able to automatically set variable '${VARNAME}'.")
endif()
endif()
endfunction()
# GCC can tell us a default PSC_TARGET
if(NOT PSC_TARGET)
get_gcc_to_detect(PSC_TARGET)
if(PATH64_GCC_EXECUTABLE)
set(_dumpmachine_command ${PATH64_GCC_EXECUTABLE} -dumpmachine)
execute_process(COMMAND ${_dumpmachine_command}
OUTPUT_VARIABLE _dumpmachine_output
ERROR_QUIET
RESULT_VARIABLE _dumpmachine_result
OUTPUT_STRIP_TRAILING_WHITESPACE)
if(NOT _dumpmachine_result EQUAL 0)
message(FATAL_ERROR "Could not run '${_dumpmachine_command}' - got ${_dumpmachine_result}. Can't automatically set variables.")
endif()
set(PSC_MACHINE "${_dumpmachine_output}" CACHE STRING "Target string")
if(PSC_MACHINE STREQUAL "mingw32")
set(PSC_TARGET "x86_32" CACHE STRING "Target string")
else()
set(PSC_TARGET "${_dumpmachine_output}" CACHE STRING "Target string")
message(STATUS "Detected PSC_TARGET as '${PSC_TARGET}'")
endif()
endif()
endif()
# PSC_TARGET implies defaults for PATH64_ENABLE_TARGETS
if(PSC_TARGET AND NOT PATH64_ENABLE_TARGETS)
if(PSC_TARGET MATCHES "mips64")
set(PATH64_ENABLE_TARGETS mips_32 mips_64)
elseif((PSC_TARGET MATCHES "i386") AND (PSC_TARGET MATCHES "solaris"))
# defaulting to x86_64 on solaris
set(PATH64_ENABLE_TARGETS x86_64)
elseif((PSC_TARGET MATCHES "x86.*64.*") OR (PSC_TARGET MATCHES "amd64.*"))
set(PATH64_ENABLE_TARGETS x86_64)
elseif(PSC_TARGET MATCHES "x86_32")
set(PATH64_ENABLE_TARGETS x86_32)
else()
message(FATAL_ERROR "Couldn't auto-identify targets with PSC_TARGET='${PSC_TARGET}'!")
endif()
set(PATH64_ENABLE_TARGETS "${PATH64_ENABLE_TARGETS}" CACHE STRING "Targets to enable.")
message(STATUS "Detected PATH64_ENABLE_TARGETS as '${PATH64_ENABLE_TARGETS}'")
endif()
# Table of flags to use for targets
set(TARGET_FLAGS_mips_32 "-mabi=n32")
set(TARGET_FLAGS_mips_64 "-mabi=32")
set(TARGET_FLAGS_x86_64 "-m64")
set(TARGET_FLAGS_x86_32 "-m32")
# If we have targets, each one of them should have some additional variables
if(PATH64_ENABLE_TARGETS)
# Check all enabled targets
foreach(TARGET_NAME ${PATH64_ENABLE_TARGETS})
set(TARGET_FLAGS ${TARGET_FLAGS_${TARGET_NAME}})
if(NOT TARGET_FLAGS)
message(FATAL_ERROR "Don't know what flags to use for target '${TARGET_NAME}'")
endif()
# Determine a default value for PSC_CRTBEGIN_PATH_${TARGET_NAME}
if(NOT PSC_CRTBEGIN_PATH_${TARGET_NAME})
get_machine_gcc_to_detect(PSC_CRTBEGIN_PATH_${TARGET_NAME})
if(PATH64_MACHINE_GCC_EXECUTABLE)
message(STATUS "Detecting PSC_CRTBEGIN_PATH_${TARGET_NAME}...")
execute_process(COMMAND ${PATH64_MACHINE_GCC_EXECUTABLE} ${TARGET_FLAGS} -print-libgcc-file-name
OUTPUT_VARIABLE _libgcc_fn
ERROR_QUIET
OUTPUT_STRIP_TRAILING_WHITESPACE)
if(_libgcc_fn)
get_filename_component(PSC_CRTBEGIN_PATH_${TARGET_NAME} "${_libgcc_fn}" PATH)
get_filename_component(PSC_CRTBEGIN_PATH_${TARGET_NAME} "${PSC_CRTBEGIN_PATH_${TARGET_NAME}}" ABSOLUTE CACHE)
message(STATUS "Detected PSC_CRTBEGIN_PATH_${TARGET_NAME} as ${PSC_CRTBEGIN_PATH_${TARGET_NAME}}")
endif()
endif()
endif()
# Determine a default value for PSC_CRT_PATH_${TARGET_NAME}
if(NOT PSC_CRT_PATH_${TARGET_NAME})
get_machine_gcc_to_detect(PSC_CRT_PATH_${TARGET_NAME})
if(PATH64_MACHINE_GCC_EXECUTABLE)
message(STATUS "Detecting PSC_CRT_PATH_${TARGET_NAME}...")
execute_process(COMMAND ${PATH64_MACHINE_GCC_EXECUTABLE} ${TARGET_FLAGS} -print-file-name=crt1.o
OUTPUT_VARIABLE _crt_fn
ERROR_QUIET
OUTPUT_STRIP_TRAILING_WHITESPACE)
if(_crt_fn)
get_filename_component(PSC_CRT_PATH_${TARGET_NAME} "${_crt_fn}" PATH)
get_filename_component(PSC_CRT_PATH_${TARGET_NAME} "${PSC_CRT_PATH_${TARGET_NAME}}" ABSOLUTE CACHE)
message(STATUS "Detected PSC_CRT_PATH_${TARGET_NAME} as ${PSC_CRT_PATH_${TARGET_NAME}}")
endif()
endif()
endif()
# Determine a default value for PSC_DYNAMIC_LINKER_${TARGET_NAME}
if(NOT PSC_DYNAMIC_LINKER_${TARGET_NAME})
get_machine_gcc_to_detect(PSC_DYNAMIC_LINKER_${TARGET_NAME})
if(PATH64_MACHINE_GCC_EXECUTABLE)
message(STATUS "Detecting PSC_DYNAMIC_LINKER_${TARGET_NAME}...")
execute_process(COMMAND ${PATH64_MACHINE_GCC_EXECUTABLE} ${TARGET_FLAGS} --help -v
#COMMAND awk "'/-dynamic-linker/ { match($0, \"-dynamic-linker +[^ ]+\"); print substr($0, RSTART+16, RLENGTH-16) }'"
OUTPUT_QUIET
ERROR_VARIABLE _ldso_output)
if(_ldso_output MATCHES "-dynamic-linker ([^ ]+)")
set(PSC_DYNAMIC_LINKER_${TARGET_NAME} "${CMAKE_MATCH_1}" CACHE FILEPATH "Dynamic linker library for ${TARGET_NAME}")
message(STATUS "Detected PSC_DYNAMIC_LINKER_${TARGET_NAME} as ${PSC_DYNAMIC_LINKER_${TARGET_NAME}}")
endif()
endif()
endif()
find_path(PSC_LIBGCC_PATH_${TARGET_NAME} libgcc.a HINTS ${PSC_CRTBEGIN_PATH_${TARGET_NAME}} ${PSC_CRT_PATH_${TARGET_NAME}})
find_path(PSC_LIBGCC_EH_PATH_${TARGET_NAME} libgcc_eh.a HINTS ${PSC_CRTBEGIN_PATH_${TARGET_NAME}} ${PSC_CRT_PATH_${TARGET_NAME}})
find_path(PSC_LIBGCC_S_PATH_${TARGET_NAME} NAMES libgcc_s.a libgcc_s.so.1 HINTS ${PSC_CRTBEGIN_PATH_${TARGET_NAME}} ${PSC_CRT_PATH_${TARGET_NAME}} PATHS /lib)
find_path(PSC_LIBSTDCPP_PATH_${TARGET_NAME} libstdc++.a HINTS ${PSC_CRTBEGIN_PATH_${TARGET_NAME}} ${PSC_CRT_PATH_${TARGET_NAME}})
find_path(PSC_LIBSUPCPP_PATH_${TARGET_NAME} libsupc++.a HINTS ${PSC_CRTBEGIN_PATH_${TARGET_NAME}} ${PSC_CRT_PATH_${TARGET_NAME}})
foreach(VARNAME PSC_LIBGCC_PATH_${TARGET_NAME} PSC_LIBGCC_EH_PATH_${TARGET_NAME} PSC_LIBGCC_S_PATH_${TARGET_NAME} PSC_LIBSTDCPP_PATH_${TARGET_NAME} PSC_LIBSUPCPP_PATH_${TARGET_NAME})
if(${${VARNAME}})
get_filename_component(dir ${${VARNAME}} ABSOLUTE)
file(TO_CMAKE_PATH ${dir} dir)
list(APPEND PSC_GCC_LIBRARY_DIRS_SECONDARY ${dir})
endif()
endforeach()
endforeach()
endif()
if(NOT PSC_GCC_LIBRARY_DIRS)
get_machine_gcc_to_detect(PSC_GCC_LIBRARY_DIRS)
if(PATH64_MACHINE_GCC_EXECUTABLE)
message(STATUS "Detecting PSC_GCC_LIBRARY_DIRS...")
execute_process(COMMAND ${PATH64_MACHINE_GCC_EXECUTABLE} -print-search-dirs
OUTPUT_VARIABLE _searchdirs
ERROR_QUIET)
if("${_searchdirs}" MATCHES "libraries: =(.*)")
string(REPLACE ":" ";" dirs "${CMAKE_MATCH_1}")
foreach(dir ${dirs})
get_filename_component(dir ${dir} ABSOLUTE)
file(TO_CMAKE_PATH ${dir} dir)
list(FIND PSC_GCC_LIBRARY_DIRS "${dir}" found)
if(IS_DIRECTORY "${dir}" AND found EQUAL -1)
list(APPEND PSC_GCC_LIBRARY_DIRS ${dir})
endif()
endforeach()
endif()
if(PSC_GCC_LIBRARY_DIRS)
set(PSC_GCC_LIBRARY_DIRS ${PSC_GCC_LIBRARY_DIRS} ${PSC_GCC_LIBRARY_DIRS_SECONDARY})
message(STATUS "Detected PSC_GCC_LIBRARY_DIRS as ${PSC_GCC_LIBRARY_DIRS}")
set(PSC_GCC_LIBRARY_DIRS "${PSC_GCC_LIBRARY_DIRS}" CACHE STRING "Library dirs that the machine gcc searches.")
endif()
endif()
endif()