![]() The condition must be either 0 or 1Īfter evaluating generator expressions. Generate the output file for a particular configuration only if ![]() Generate an output file for each build configuration supported by the currentįrom the input content to produce the output content. ![]() Will be defaulted to respect the Byte Order Mark.įile ( GENERATE OUTPUT output - file ) Is not provided and the file has a Byte Order Mark, the ENCODING option ENCODING Ĭonsider strings of a given encoding. REGEX Ĭonsider only strings that match the given regular expression. Intel Hex and Motorola S-record files are automatically converted toīinary while reading unless this option is given. Treat newline characters ( \n, LF) as part of string content Limit the number of total bytes to store in the. Limit the number of input bytes to read from the file. Limit the number of distinct strings to be extracted. LENGTH_MINIMUM Ĭonsider only strings of at least a given length. The options are: LENGTH_MAXIMUM Ĭonsider only strings of at most a given length. A supply chain attack targeting a build system was used in the 2020 United States federal government data breach.Parse a list of ASCII strings from and store it in A harmful actor could secretly add a file to the source directory which would later get installed as a shared library. Its a fast way to get all the source referenced (once the build system’s running - replace globbing with explicit file-lists).Īnother comment indicates GLOB as a potential vulnerability for a supply chain attack. One of the exceptions for using GLOB listed isįor setting up a CMakeLists.txt files for existing projects that don’t use CMake. How to collect source files with CMake without globbing?.Is it better to specify source files with GLOB or each file individually in CMake?.I found a few threads on Stack Exchange which list some of the pros and cons of using GLOB for collecting source file lists: For example you could write a script to symlink a list of files ( LIST_DIRECTORIES False) to a single directory or to copy a list of Fortran namelist files to the target install directory. You can interpret such files with cmake -P. cmake) for tasks that don’t involve build targets. tab characters, which you cannot distinguish from spaces onscreen).įrom the talk by Daniel Pfeifer I linked above, the GLOB flag is useful primarily in script mode (i.e. So don’t mistake my advocacy for make as approval of its oddball conventions (e.g. But for whatever reasons, that is the standard way these things were done. This way, the essential information can be used to determine when compilations are actually required, and the nonessential information such as time stamps and programmer name can be ignored.īTW, I have always thought that make was a terribly defined tool for its purpose. One solution to this problem is to standardize the information and the format in which that information is stored within the *.mod files. This in turn results in the compilation cascades and in unnecessary compilations during the build step. So tools such as make were limited to use only file modification dates. So external mechansims, such as make files, are required.īut the fortran standard did not standardize how the information from modules was formatted or used. Unfortunately, the mechanism to specify these interdependencies was not included in the fortran standard itself. Modules broke the convention that the object files could be created in any order, they require a specific order of compilation for interdependent files. When f90 was introduced, with modules, it became an essential part of writing a large program to specify the interdependence of files within the project. ![]() So the solution you accepted goes against the teachings of the CMake documentation. Even if CONFIGURE_DEPENDS works reliably, there is still a cost to perform the check on every rebuild. The CONFIGURE_DEPENDS flag may not work reliably on all generators, or if a new generator is added in the future that cannot support it, projects using it will be stuck. If no CMakeLists.txt file changes when a source is added or removed then the generated build system cannot know when to ask CMake to regenerate. Note: We do not recommend using GLOB to collect a list of source files from your source tree. If any of the outputs change, CMake will regenerate the build system.įrom my understanding this has nothing to do with tracking module dependencies, but simply with the fact your Makefiles are regenerated at each file change.Īs already mentioned by it also incurs a build overhead: New in version 3.12: If the CONFIGURE_DEPENDS flag is specified, CMake will add logic to the main build system check target to rerun the flagged GLOB commands at build time. The line shown by adds the CONFIGURE_DEPENDS flag, which requires CMake 3.12. I’m confused by what you mean with recompiling. ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |