4fdd1765e6
Commit originally by: Paul Brook <paul@codesourcery.com> Port to newer version and commit message by: Matthijs Kooijman <matthijs@stdin.nl> Instead of generating a big list of dependencies at the start, now dependency files are generated whenever a .o file is compiled. This works, since if the .o file does not exist, it should be compiled and make does not need to know about its dependencies. If the .o (and thus the .d) file does exist, the .d file contains all the dependencies used to compile the .o file. If none of those changed, the .o file does not need a recompile, but also the .d file is still accurate (in particular, the dependency list cannot change without one of the dependent .h files or the .cpp file itself changing). This helps to remove a lot of duplication in the code, since now only a single commandline is needed for both compilation and dependency generation. It will probably also run a bit faster now. Note that this commit breaks the creation of $(OBJDIR) since this "accidentally" always worked before because $(DEPFILE) was created before anything else. That will be fixed next. |
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