diff options
Diffstat (limited to 'extern/draco/dracoenc/cmake/util.cmake')
| -rw-r--r-- | extern/draco/dracoenc/cmake/util.cmake | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/extern/draco/dracoenc/cmake/util.cmake b/extern/draco/dracoenc/cmake/util.cmake new file mode 100644 index 00000000000..252761fe6fb --- /dev/null +++ b/extern/draco/dracoenc/cmake/util.cmake @@ -0,0 +1,74 @@ +if (NOT DRACO_CMAKE_UTIL_CMAKE_) +set(DRACO_CMAKE_UTIL_CMAKE_ 1) + +# Creates dummy source file in $draco_build_dir named $basename.$extension and +# returns the full path to the dummy source file via the $out_file_path +# parameter. +function (create_dummy_source_file basename extension out_file_path) + set(dummy_source_file "${draco_build_dir}/${basename}.${extension}") + file(WRITE "${dummy_source_file}" + "// Generated file. DO NOT EDIT!\n" + "// ${target_name} needs a ${extension} file to force link language, \n" + "// or to silence a harmless CMake warning: Ignore me.\n" + "void ${target_name}_dummy_function(void) {}\n") + set(${out_file_path} ${dummy_source_file} PARENT_SCOPE) +endfunction () + +# Convenience function for adding a dummy source file to $target_name using +# $extension as the file extension. Wraps create_dummy_source_file(). +function (add_dummy_source_file_to_target target_name extension) + create_dummy_source_file("${target_name}" "${extension}" "dummy_source_file") + target_sources(${target_name} PRIVATE ${dummy_source_file}) +endfunction () + +# Extracts the version number from $version_file and returns it to the user via +# $version_string_out_var. This is achieved by finding the first instance of +# the kDracoVersion variable and then removing everything but the string literal +# assigned to the variable. Quotes and semicolon are stripped from the returned +# string. +function (extract_version_string version_file version_string_out_var) + file(STRINGS "${version_file}" draco_version REGEX "kDracoVersion") + list(GET draco_version 0 draco_version) + string(REPLACE "static const char kDracoVersion[] = " "" draco_version + "${draco_version}") + string(REPLACE ";" "" draco_version "${draco_version}") + string(REPLACE "\"" "" draco_version "${draco_version}") + set("${version_string_out_var}" "${draco_version}" PARENT_SCOPE) +endfunction () + +# Sets CMake compiler launcher to $launcher_name when $launcher_name is found in +# $PATH. Warns user about ignoring build flag $launcher_flag when $launcher_name +# is not found in $PATH. +function (set_compiler_launcher launcher_flag launcher_name) + find_program(launcher_path "${launcher_name}") + if (launcher_path) + set(CMAKE_C_COMPILER_LAUNCHER "${launcher_path}" PARENT_SCOPE) + set(CMAKE_CXX_COMPILER_LAUNCHER "${launcher_path}" PARENT_SCOPE) + message("--- Using ${launcher_name} as compiler launcher.") + else () + message(WARNING + "--- Cannot find ${launcher_name}, ${launcher_flag} ignored.") + endif () +endfunction () + +# Terminates CMake execution when $var_name is unset in the environment. Sets +# CMake variable to the value of the environment variable when the variable is +# present in the environment. +macro(require_variable var_name) + if ("$ENV{${var_name}}" STREQUAL "") + message(FATAL_ERROR "${var_name} must be set in environment.") + endif () + set_variable_if_unset(${var_name} "") +endmacro () + +# Sets $var_name to $default_value if not already set in the environment. +macro (set_variable_if_unset var_name default_value) + if (NOT "$ENV{${var_name}}" STREQUAL "") + set(${var_name} $ENV{${var_name}}) + else () + set(${var_name} ${default_value}) + endif () +endmacro () + +endif() # DRACO_CMAKE_UTIL_CMAKE_ + |