Fw: gmake creates files that already exist and are up-to-date

[Simon De Groot]

Hi,

I hope someone can help me out here.
Consider the following makefile:

(start makefile)

.SECONDARY :

BLOCKS = one two
BLOCK_TS = $(BLOCKS:%=%_ent_build.ts)

CDS2HDL_SYM = $(BLOCKS)
CDS2HDL_ENT_TS = $(CDS2HDL_SYM:%=%_ent.ts)
CDS2HDL_ENTS_TS = cds2hdl_ents.ts

all : top_hl.ts ;

%_hl.ts : $(BLOCK_TS) $(CDS2HDL_ENTS_TS)
        touch
$@

$(CDS2HDL_ENTS_TS) : $(CDS2HDL_ENT_TS)
        @echo
"(batch) Making $(patsubst %.ts,%.vhd,$?)"
        touch
$(patsubst %.ts,%.vhd,$?)
        touch
$@

%_ent.ts : %.cdb
        touch
$@

%_ent_build.ts : %_ent.vhd
        @echo
NIY: Compile $*_ent.vhd
        touch
$@

%_ent.vhd : %.cdb
        @echo
"(single) Making $@ from $<"
        touch
$@
        @echo
"Touching timestamps for batch execution"
        touch
$*_ent.ts
        touch
$(CDS2HDL_ENTS_TS)

clean :
        rm
-f *.ts
        rm
-f *_ent.vhd
        rm
-f *_highlevel.vhd

fake :
        touch
$(patsubst %,%.cdb,$(BLOCKS))

(end makefile)

Now run:
%> make fake
%> make --debug

This will give you:

(start log)

Reading makefiles...
Updating goal targets....
 File `all' does not exist.
   File `top_hl.ts' does
not exist.
     File `cds2hdl_ents.ts'
does not exist.
       File `one_ent.ts'
does not exist.
      Must remake target
`one_ent.ts'.

touch one_ent.ts

      Successfully remade
target file `one_ent.ts'.
       File `two_ent.ts'
does not exist.
      Must remake target
`two_ent.ts'.

touch two_ent.ts

      Successfully remade
target file `two_ent.ts'.
    Must remake target `cds2hdl_ents.ts'.

(batch) Making one_ent.vhd two_ent.vhd
touch one_ent.vhd two_ent.vhd
touch cds2hdl_ents.ts

    Successfully remade target
file `cds2hdl_ents.ts'.
    File `one_ent_build.ts'
does not exist.
     File
`one_ent.vhd' does not exist.
    Must remake target `one_ent.vhd'.

(single) Making one_ent.vhd from one.cdb
touch one_ent.vhd
Touching timestamps for batch execution
touch one_ent.ts
touch cds2hdl_ents.ts

    Successfully remade target
file `one_ent.vhd'.
   Must remake target `one_ent_build.ts'.

NIY: Compile one_ent.vhd
touch one_ent_build.ts

   Successfully remade target
file `one_ent_build.ts'.
    File `two_ent_build.ts'
does not exist.
     File `two_ent.vhd'
does not exist.
    Must remake target `two_ent.vhd'.

(single) Making two_ent.vhd from two.cdb
touch two_ent.vhd
Touching timestamps for batch execution
touch two_ent.ts
touch cds2hdl_ents.ts

    Successfully remade target
file `two_ent.vhd'.
   Must remake target `two_ent_build.ts'.

NIY: Compile two_ent.vhd
touch two_ent_build.ts

   Successfully remade target
file `two_ent_build.ts'.
  Must remake target `top_hl.ts'.

NIY: Compile top_highlevel.vhd
touch top_hl.ts

  Successfully remade target file
`top_hl.ts'.
Must remake target `all'.
Successfully remade target file `all'.

(end log)

During '(batch)', one_ent.vhd is touched.
However, shortly after, debug info reports: 'File `one_ent.vhd' does not
exist.', although it has just been created. If you would switch the order
of the dependencies of %_hl.ts, it works correctly.

Can anyone explain this?

Regards,

Simon.