mirror of
https://git.mirrors.martin98.com/https://github.com/google/draco
synced 2025-04-21 05:09:52 +08:00
fde45e52f2
Updates require_var() and set_variable_if_unset() to use the environment values for named variables. CMake processes toolchain files multiple times, and on some processing runs cache variables are not available. Environment variables are always available.
75 lines
3.2 KiB
CMake
75 lines
3.2 KiB
CMake
if (NOT DRACO_CMAKE_UTIL_CMAKE_)
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set(DRACO_CMAKE_UTIL_CMAKE_ 1)
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# Creates dummy source file in $draco_build_dir named $basename.$extension and
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# returns the full path to the dummy source file via the $out_file_path
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# parameter.
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function (create_dummy_source_file basename extension out_file_path)
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set(dummy_source_file "${draco_build_dir}/${basename}.${extension}")
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file(WRITE "${dummy_source_file}"
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"// Generated file. DO NOT EDIT!\n"
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"// ${target_name} needs a ${extension} file to force link language, \n"
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"// or to silence a harmless CMake warning: Ignore me.\n"
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"void ${target_name}_dummy_function(void) {}\n")
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set(${out_file_path} ${dummy_source_file} PARENT_SCOPE)
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endfunction ()
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# Convenience function for adding a dummy source file to $target_name using
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# $extension as the file extension. Wraps create_dummy_source_file().
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function (add_dummy_source_file_to_target target_name extension)
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create_dummy_source_file("${target_name}" "${extension}" "dummy_source_file")
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target_sources(${target_name} PRIVATE ${dummy_source_file})
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endfunction ()
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# Extracts the version number from $version_file and returns it to the user via
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# $version_string_out_var. This is achieved by finding the first instance of
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# the kDracoVersion variable and then removing everything but the string literal
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# assigned to the variable. Quotes and semicolon are stripped from the returned
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# string.
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function (extract_version_string version_file version_string_out_var)
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file(STRINGS "${version_file}" draco_version REGEX "kDracoVersion")
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list(GET draco_version 0 draco_version)
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string(REPLACE "static const char kDracoVersion[] = " "" draco_version
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"${draco_version}")
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string(REPLACE ";" "" draco_version "${draco_version}")
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string(REPLACE "\"" "" draco_version "${draco_version}")
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set("${version_string_out_var}" "${draco_version}" PARENT_SCOPE)
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endfunction ()
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# Sets CMake compiler launcher to $launcher_name when $launcher_name is found in
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# $PATH. Warns user about ignoring build flag $launcher_flag when $launcher_name
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# is not found in $PATH.
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function (set_compiler_launcher launcher_flag launcher_name)
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find_program(launcher_path "${launcher_name}")
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if (launcher_path)
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set(CMAKE_C_COMPILER_LAUNCHER "${launcher_path}" PARENT_SCOPE)
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set(CMAKE_CXX_COMPILER_LAUNCHER "${launcher_path}" PARENT_SCOPE)
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message("--- Using ${launcher_name} as compiler launcher.")
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else ()
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message(WARNING
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"--- Cannot find ${launcher_name}, ${launcher_flag} ignored.")
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endif ()
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endfunction ()
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# Terminates CMake execution when $var_name is unset in the environment. Sets
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# CMake variable to the value of the environment variable when the variable is
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# present in the environment.
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macro(require_variable var_name)
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if ("$ENV{${var_name}}" STREQUAL "")
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message(FATAL_ERROR "${var_name} must be set in environment.")
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endif ()
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set_variable_if_unset(${var_name} "")
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endmacro ()
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# Sets $var_name to $default_value if not already set in the environment.
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macro (set_variable_if_unset var_name default_value)
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if (NOT "$ENV{${var_name}}" STREQUAL "")
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set(${var_name} $ENV{${var_name}})
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else ()
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set(${var_name} ${default_value})
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endif ()
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endmacro ()
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endif() # DRACO_CMAKE_UTIL_CMAKE_
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