Re: Time stamp resolution

[Paul D. Smith]

%% Jason Pearce <address@hidden> writes:

  jp> VHDL_SOURCES    := $(wildcard *.vhd)

  jp> vhdldep.mak : ${VHDL_SOURCES}
  jp>     perl vhdldep.pl -t mak ${VHDL_SOURCES} > vhdldep.makfail
  jp> #    sleep 1
  jp>     /bin/mv vhdldep.makfail vhdldep.mak

  jp> include vhdldep.mak

  jp> sources:: generated1.vhd

  jp> generated1.vhd : generated1.vhd.m4
  jp>     m4 generated1.vhd.m4 > generated1.vhd.fail
  jp>     /bin/mv generated1.vhd.fail generated1.vhd
   
  jp> sources:: generated2.vhd

  jp> generated2.vhd : generated1.vhd.m4
  jp>     m4 generated2.vhd.m4 > generated2.vhd.fail
  jp>     /bin/mv generated2.vhd.fail generated2.vhd

Hm.  If I understand what you're doing, I would avoid this two-step
operation by having the .mak file depend on the actual files.  Does
something like this do what you want:


  VHDL_SOURCES    := $(wildcard *.vhd)
  vhdldep.mak : generated1.vhd generated2.vhd ${VHDL_SOURCES}
        perl vhdldep.pl -t mak *.vhd > vhdldep.makfail
        /bin/mv vhdldep.makfail vhdldep.mak

  include vhdldep.mak


  generated1.vhd : generated1.vhd.m4
        m4 generated1.vhd.m4 > generated1.vhd.fail
        /bin/mv generated1.vhd.fail generated1.vhd

  generated2.vhd : generated1.vhd.m4
        m4 generated2.vhd.m4 > generated2.vhd.fail
        /bin/mv generated2.vhd.fail generated2.vhd


??  I think it should.

Also, I would definitely use make variables for perl, m4, and /bin/mv
rather than writing them out directly... :-).

-- 
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 Paul D. Smith <address@hidden>          Find some GNU make tips at:
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 "Please remain calm...I may be mad, but I am a professional." --Mad Scientist