RE: A possible bug (or a feature) : dependencies shown in dry-run but not rebuilt

[Paul D. Smith]

%% David Mentre <address@hidden> writes:

  dm>    Prerequisite `x.h' is newer than target `x.c'.    <<<<---- ok

No, not OK!

You don't want to specify that the .c file depends on the .h file.  You
don't update the .c file when the .h file changes: you have no rule for
that.

It's the .o file that depends on the .h file: the .o file is the file
that needs to be updated when either the .c _or_ the .h file changes.

Change your rule definition from:

  x.c: x.h \
          perf.h \
            ...
          autotest.h ;

to:

  x.o: x.h \
          perf.h \
            ...
          autotest.h

(note you must remove the trailing semicolon as well!)

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 Paul D. Smith <address@hidden>          Find some GNU make tips at:
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