148 lines
4.5 KiB
CMake
148 lines
4.5 KiB
CMake
# set_default
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#
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# Define a variable to a default value if otherwise unset.
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#
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# Priority for new value is:
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# - Existing cmake value (ie set with cmake -D, or already set in CMakeLists)
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# - Value of any non-empty environment variable of the same name
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# - Default value as provided to function
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#
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function(set_default variable default_value)
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if(NOT ${variable})
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if($ENV{${variable}})
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set(${variable} $ENV{${variable}} PARENT_SCOPE)
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else()
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set(${variable} ${default_value} PARENT_SCOPE)
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endif()
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endif()
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endfunction()
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# spaces2list
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#
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# Take a variable whose value was space-delimited values, convert to a cmake
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# list (semicolon-delimited)
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#
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# Note: if using this for directories, keeps the issue in place that
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# directories can't contain spaces...
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#
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# TODO: look at cmake separate_arguments, which is quote-aware
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function(spaces2list variable_name)
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string(REPLACE " " ";" tmp "${${variable_name}}")
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set("${variable_name}" "${tmp}" PARENT_SCOPE)
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endfunction()
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# lines2list
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#
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# Take a variable with multiple lines of output in it, convert it
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# to a cmake list (semicolon-delimited), one line per item
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#
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function(lines2list variable_name)
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string(REGEX REPLACE "\r?\n" ";" tmp "${${variable_name}}")
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string(REGEX REPLACE ";;" ";" tmp "${tmp}")
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set("${variable_name}" "${tmp}" PARENT_SCOPE)
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endfunction()
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# move_if_different
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#
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# If 'source' has different md5sum to 'destination' (or destination
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# does not exist, move it across.
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#
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# If 'source' has the same md5sum as 'destination', delete 'source'.
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#
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# Avoids timestamp updates for re-generated files where content hasn't
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# changed.
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function(move_if_different source destination)
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set(do_copy 1)
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file(GLOB dest_exists ${destination})
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if(dest_exists)
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file(MD5 ${source} source_md5)
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file(MD5 ${destination} dest_md5)
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if(source_md5 STREQUAL dest_md5)
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set(do_copy "")
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endif()
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endif()
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if(do_copy)
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message("Moving ${source} -> ${destination}")
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file(RENAME ${source} ${destination})
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else()
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message("Not moving ${source} -> ${destination}")
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file(REMOVE ${source})
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endif()
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endfunction()
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# add_compile_options variant for C++ code only
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#
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# This adds global options, set target properties for
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# component-specific flags
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function(add_cxx_compile_options)
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foreach(option ${ARGV})
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# note: the Visual Studio Generator doesn't support this...
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add_compile_options($<$<COMPILE_LANGUAGE:CXX>:${option}>)
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endforeach()
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endfunction()
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# add_compile_options variant for C code only
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#
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# This adds global options, set target properties for
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# component-specific flags
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function(add_c_compile_options)
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foreach(option ${ARGV})
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# note: the Visual Studio Generator doesn't support this...
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add_compile_options($<$<COMPILE_LANGUAGE:C>:${option}>)
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endforeach()
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endfunction()
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# target_add_binary_data adds binary data into the built target,
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# by converting it to a generated source file which is then compiled
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# to a binary object as part of the build
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function(target_add_binary_data target embed_file embed_type)
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get_filename_component(embed_file "${embed_file}" ABSOLUTE)
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get_filename_component(name "${embed_file}" NAME)
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set(embed_srcfile "${CMAKE_BINARY_DIR}/${name}.c")
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add_custom_command(OUTPUT "${embed_srcfile}"
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COMMAND "${CMAKE_COMMAND}"
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-D "DATA_FILE=${embed_file}"
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-D "SOURCE_FILE=${embed_srcfile}"
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-D "FILE_TYPE=${embed_type}"
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-P "${IDF_PATH}/tools/cmake/scripts/data_file_to_c.cmake"
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MAIN_DEPENDENCY "${embed_file}"
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WORKING_DIRECTORY "${CMAKE_BINARY_DIR}")
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set_property(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}" APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES "${embed_srcfile}")
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target_sources("${target}" PRIVATE "${embed_srcfile}")
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endfunction()
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macro(include_if_exists path)
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if(EXISTS "${path}")
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include("${path}")
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endif()
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endmacro()
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# Append a single line to the file specified
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# The line ending is determined by the host OS
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function(file_append_line file line)
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if(ENV{MSYSTEM} OR CMAKE_HOST_WIN32)
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set(line_ending "\r\n")
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else() # unix
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set(line_ending "\n")
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endif()
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file(READ ${file} existing)
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string(FIND ${existing} ${line_ending} last_newline REVERSE)
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string(LENGTH ${existing} length)
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math(EXPR length "${length}-1")
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if(NOT length EQUAL last_newline) # file doesn't end with a newline
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file(APPEND "${file}" "${line_ending}")
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endif()
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file(APPEND "${file}" "${line}${line_ending}")
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endfunction()
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