[Octave-bug-tracker] [bug #46063] Build system re-makes certain files 2 or even 3 times

[Mike Miller]

Follow-up Comment #8, bug #46063 (project octave):

Sorry, it's the BUILT_SOURCES that are also foo_SOURCES for some program
listed in ALL_LOCAL_TARGETS.

For example


$ make src/octave-gui-4.1.0+
  GEN      libinterp/corefcn/defaults.h
libinterp/corefcn/defaults.h is unchanged
  GEN      libinterp/corefcn/graphics-props.cc
libinterp/corefcn/graphics-props.cc is unchanged
  GEN      libinterp/corefcn/graphics.h
libinterp/corefcn/graphics.h is unchanged
  GEN      libinterp/corefcn/mxarray.h
libinterp/corefcn/mxarray.h is unchanged
  GEN      libinterp/version.h
libinterp/version.h is unchanged
  GEN      libinterp/builtin-defun-decls.h
libinterp/builtin-defun-decls.h is unchanged
  GEN      libinterp/builtins.cc
libinterp/builtins.cc is unchanged
  GEN      libinterp/build-env.cc
libinterp/build-env.cc is unchanged



Each of those files are prerequisites of the octave-gui program, and also in
BUILT_SOURCES which makes them prerequisites of the "all" target. The reason
they show up twice is because "make all" forces its prereqs first and then
calls make recursively.

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