minecraft-pi-reborn/cmake/base-toolchain.cmake

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CMake
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# Get Host Architecture
find_program(UNAME uname /bin /usr/bin /usr/local/bin REQUIRED)
execute_process(COMMAND "${UNAME}" "-m" OUTPUT_VARIABLE HOST_ARCHITECTURE ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
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# Get Include Directories
function(get_include_dirs target compiler result)
# Get Tool Name
set(tool "cc1")
if(compiler MATCHES "^.*g\\+\\+$")
set(tool "cc1plus")
endif()
# Get Tool Path
execute_process(
COMMAND "${compiler}" "-print-prog-name=${tool}"
ERROR_QUIET
OUTPUT_VARIABLE tool
OUTPUT_STRIP_TRAILING_WHITESPACE
)
# Run Tool To Get Include Path
set(tool_output "")
execute_process(
COMMAND "${tool}" "-quiet" "-v" "-imultiarch" "${target}"
OUTPUT_QUIET
ERROR_VARIABLE tool_output
ERROR_STRIP_TRAILING_WHITESPACE
INPUT_FILE "/dev/null"
)
string(REPLACE "\n" ";" tool_output "${tool_output}")
# Loop
set(parsing_include_section FALSE)
foreach(line IN LISTS tool_output)
# Check Include Section Status
if(parsing_include_section)
# Check If Include Section Is Over
if(line MATCHES "^End of search list.$")
# Starting Include Section
set(parsing_include_section FALSE)
break()
else()
# Parsing Include Section
if(line MATCHES "^ .*$")
# Strip Line
string(STRIP "${line}" line)
# Add To List
list(APPEND "${result}" "${line}")
endif()
endif()
else()
# Check If Include Section Is Starting
if(line MATCHES "^#include <\\.\\.\\.> search starts here:$")
# Starting Include Section
set(parsing_include_section TRUE)
endif()
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endif()
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endforeach()
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# Return
set("${result}" "${${result}}" PARENT_SCOPE)
endfunction()
# Get GCC Prefix
function(get_gcc_prefix target result)
# Get Default Target
set("${result}" "" PARENT_SCOPE)
set(output "")
execute_process(
COMMAND "gcc" "-dumpmachine"
ERROR_QUIET
OUTPUT_VARIABLE output
OUTPUT_STRIP_TRAILING_WHITESPACE
)
# Check
if(NOT output STREQUAL target)
set("${result}" "${target}-" PARENT_SCOPE)
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endif()
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endfunction()
# Setup Include Directories
function(setup_include_dirs compiler target result)
# Get Full Compiler
set(prefix "")
get_gcc_prefix("${target}" prefix)
set(full_compiler "${prefix}${compiler}")
# Get Include Directories
set(include_dirs "")
get_include_dirs("${target}" "${full_compiler}" include_dirs)
# Loop
set(flags "")
foreach(include_dir IN LISTS include_dirs)
set(flags "${flags} -isystem ${include_dir}")
endforeach()
# Return
set("${result}" "${${result}} ${flags}" PARENT_SCOPE)
endfunction()
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# Setup Toolchain
macro(setup_toolchain target)
# Use ARM Cross-Compiler
set(CMAKE_C_COMPILER "clang")
set(CMAKE_C_COMPILER_TARGET "${target}")
set(CMAKE_CXX_COMPILER "clang++")
set(CMAKE_CXX_COMPILER_TARGET "${target}")
set(CMAKE_FIND_ROOT_PATH "/usr/${target}" "/usr/lib/${target}")
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# Flags
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string(CONCAT NEW_FLAGS
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"-nostdinc "
"-nostdinc++ "
"-Wno-unused-command-line-argument"
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)
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set(CMAKE_C_FLAGS_INIT "${CMAKE_C_FLAGS_INIT} ${NEW_FLAGS}")
set(CMAKE_CXX_FLAGS_INIT "${CMAKE_CXX_FLAGS_INIT} ${NEW_FLAGS}")
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# Include Directories
setup_include_dirs("gcc" "${target}" CMAKE_C_FLAGS_INIT)
setup_include_dirs("g++" "${target}" CMAKE_CXX_FLAGS_INIT)
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# Extra
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
endmacro()