make SUFFIXES question.....

[Peter Morreale]

Ok all you make wizards, I've got a good one for ya....

Consider the following makefile:

---------------------clip here-------------------------

.pp.o:
	cp $*.pp $*.f

.SUFFIXES:  $(SUFFIXES) .pp
FILES= f1.o 

compile: $(FILES)
	@echo "Why isn't .f.o  applied?"

clean:
	-rm -f $(FILES)  *.f
----------------------clip here--------------------------

Create "f1.pp" and type make.

You'll notice that the ".pp.o" rule is executed, and then the 
compile rule.  The question is:  Why isn't the default ".f.o" rule 
executed before the "compile" target?  (If you type make again, the 
".f.o" rule is executed and all is well....)

It seems to me that the sequence of events should be:

    .pp.o
    .f.o
    compile

I did a make -dd on this to obtain a listing, but I can't seem to 
decifer the output.  It (the output is enclosed below)  

I executed this makefile on SunOS 4.0.3c and UNICOS 5.1 with identical 
results.  

Thanks for any and all help,
-PWM

----------------"make -dd" output-------------------------

MAKEFLAGS value: 
stat(default.mk)
doname(default.mk)
 Looking for % rule for default.mk
 find_double_suffix_rule(default.mk)
 find_suffix_rule(default.mk,default.mk,)
stat(/usr/include/make/default.mk)
doname(/usr/include/make/default.mk)
 Looking for % rule for /usr/include/make/default.mk
 find_double_suffix_rule(/usr/include/make/default.mk)
 find_suffix_rule(/usr/include/make/default.mk,/usr/include/make/default.mk,)
SUFFIXES= .o .c .c~ .s .s~ .S .S~ .ln .f .f~ .F .F~ .l .l~ .mod .mod~ .sym .def .def~ .p .p~ .r .r~ .y .y~ .h .h~ .sh .sh~ .cps .cps~
OUTPUT_OPTION =
CC= cc
CFLAGS =
CPPFLAGS =
LINT= lint
LINTFLAGS =
COMPILE.c= $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c
LINK.c= $(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)
LINT.c= $(LINT) $(LINTFLAGS) $(CPPFLAGS) $(TARGET_ARCH)
YACC= yacc
YFLAGS =
YACC.y= $(YACC) $(YFLAGS)
LEX= lex
LFLAGS =
LEX.l= $(LEX) $(LFLAGS) -t
FC= f77
FFLAGS =
COMPILE.f= $(FC) $(FFLAGS) $(TARGET_ARCH) -c
LINK.f= $(FC) $(FFLAGS) $(LDFLAGS) $(TARGET_ARCH)
COMPILE.F= $(FC) $(FFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c
LINK.F= $(FC) $(FFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)
RFLAGS =
COMPILE.r= $(FC) $(FFLAGS) $(RFLAGS) $(TARGET_ARCH) -c
LINK.r= $(FC) $(FFLAGS) $(RFLAGS) $(LDFLAGS) $(TARGET_ARCH)
M2C= m2c
M2FLAGS =
MODFLAGS =
DEFFLAGS =
COMPILE.def= $(M2C) $(M2FLAGS) $(DEFFLAGS) $(TARGET_ARCH)
COMPILE.mod= $(M2C) $(M2FLAGS) $(MODFLAGS) $(TARGET_ARCH)
PC= pc
PFLAGS =
COMPILE.p= $(PC) $(PFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c
LINK.p= $(PC) $(PFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)
AS= as
ASFLAGS =
COMPILE.s= $(AS) $(ASFLAGS) $(TARGET_MACH)
COMPILE.S= $(CC) $(ASFLAGS) $(CPPFLAGS) $(TARGET_MACH) -c
LD= ld
LDFLAGS =
LDLIBS =
MAKE= make
RM= rm -f
AR= ar
ARFLAGS= rv
GET= /usr/sccs/get
GFLAGS =
HOME= /u1/morreale
TERM= adm3a
USER= morreale
PATH= /u3/gnu/sun4/usr/local/bin:/bin:/usr/ucb:/u1/morreale/bin:.:/usr/bin/X11:/usr/bin:/usr/etc:/usr/local/bin
LOGNAME= morreale
PWD= /u1/morreale/flatau
DISPLAY= laplata:0.0
TERMCAP= la|adm3a|3a:am:do=^J:le=^H:bs:cm=\E=%+\040%+\040:cl=1^Z:co#80:ho=^^:li#24:ma=^K^P:nd=^L:up=^K:
EDITOR= /usr/ucb/vi
EKBD= vt100
GRAPHCAP= X11
MAP3270= /u1/morreale/.map3270
VISUAL= /usr/ucb/vi
PRINTER= scdimagen
VIRTUAL_ROOT= /
stat(.make.state)
MAKEFLAGS= 
stat(makefile)
doname(makefile)
 Looking for % rule for makefile
 find_double_suffix_rule(makefile)
 find_suffix_rule(makefile,makefile,)
FILES= f1.o
stat(.INIT)
doname(.INIT)
 Looking for % rule for .INIT
 find_double_suffix_rule(.INIT)
 stat(compile)
 doname(compile)
@ =
  stat(f1.o)
  doname(f1.o)
   Looking for % rule for f1.o
   find_double_suffix_rule(f1.o)
   find_suffix_rule(f1.o,f1,.o)
   build_suffix_list(.o) .c.o .s.o .S.o .f.o .F.o .l.o .mod.o .p.o .r.o .y.o .pp.o 
   Trying f1.c
   Trying f1.s
   Trying f1.S
   Trying f1.f
   Trying f1.F
   Trying f1.l
   Trying f1.mod
   Trying f1.p
   Trying f1.r
   Trying f1.y
   Trying f1.pp
   stat(f1.pp)
   doname(f1.pp)
    Looking for % rule for f1.pp
    find_double_suffix_rule(f1.pp)
    find_suffix_rule(f1.pp,f1,.pp)
    build_suffix_list(.pp) 
   Found f1.pp
   Date(f1.pp)=Sat Aug 11 18:23:07 1990 Date-dependencies(f1.o)=File does not exist
   Building f1.o using suffix rule for .pp.o because it is out of date relative to f1.pp
   find_suffix_rule(f1.o,f1.o,)
   build_suffix_list() .c .f .F .l .mod .p .r .y .sh 
   Trying f1.o.c
   Trying f1.o.f
   Trying f1.o.F
   Trying f1.o.l
   Trying f1.o.mod
   Trying f1.o.p
   Trying f1.o.r
   Trying f1.o.y
   Trying f1.o.sh
@= f1.o
*= f1
<= f1.pp
% =
? = f1.pp
@ =
* =
< =
% =
? =
cp f1.pp f1.f
   stat(.make.state)
   stat(f1.o)
  Date(f1.o)=Younger than any file Date-dependencies(compile)=File does not exist
  Building compile because it is out of date relative to f1.o
  Looking for % rule for compile
  find_double_suffix_rule(compile)
@= compile
* =
< =
% =
? = f1.o
@ =
* =
< =
% =
? =
Why .f.o is not being applied
  stat(.make.state)
  stat(compile)
 stat(.DONE)
 doname(.DONE)
  Looking for % rule for .DONE
  find_double_suffix_rule(.DONE)
--
------------------------------------------------------------------
Peter W. Morreale                  email:  morreale at ncar.ucar.edu
Nat'l Center for Atmos Research    voice:  (303) 497-1293
Scientific Computing Division