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Makefile -> pc precedence over c

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# 1  
Old 08-13-2008
Makefile -> pc precedence over c
Hi All,

I have created a common makefile that compiles both pc and c files.

i have created the dependency between the files as

.pc.o:
-----------
.c.o:
-----------

I will be deleting the .c files created from the .pc files, once the object file is created. ( better storage maintenance)

so when i have a rule like

foo: foo.o
-----

for building foo.o the precedence always goes for .c.o, i mean the make file checks for foo.c first and builds it.

What i want is to change the precedence to .pc, i.e

when i build foo, the precedence should first go to
.pc.o rule and then to .c.o.

how can i achieve that?
# 2  
Old 08-17-2008
It means dependency that .c files are created from .pc files.

So it's bellow description you should write.

---------------
.pc.c:
---------------

Regards.
# 3  
Old 08-17-2008
hey thank you.. but i dont what that as i wud be removing the generated c files for better space maintenance.

so that option wont suit me.. so is it possible to make the target condition

.o to check .pc first and then .c??
# 4  
Old 08-17-2008
I think it's better that you write your task in Makefile.

Code:
RM=rm -f
PC2C_FILE=`find -name '*.pc' -exec echo {} \; | sed -e 's/.pc$$/.c/' `
.SUFFIXES:
.SUFFIXES: .c .o .obj .pc

all:    test.exe

test.exe:       test.o test2.o test3.o
        echo $^ > $@
.c.o:
        echo $^ > $@

.pc.c:
        echo $^ > $@

clean:
        $(RM) test.exe *.o
        make better_storage_maintenance

better_storage_maintenance:
        $(RM) $(PC2C_FILE)

ls result:
Code:
4 Makefile
0 test.pc
0 test2.c
0 test3.pc

case 1: Compile
$ make
Code:
echo test.pc > test.c
echo test.c > test.o
echo test2.c > test2.o
echo test3.pc > test3.c
echo test3.c > test3.o
echo test.o test2.o test3.o > test.exe
rm test3.c test.c

(red letter is automaticaly added. So do nothing.)

The version of make program I use:
Code:
GNU Make 3.80
Copyright (C) 2002  Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.

case 2: Better storage maintenance
$ make better_storage_maintenance
Code:
rm -f `find -name '*.pc' -exec echo {} \; | sed -e 's/.pc$/.c/' `

case 3: Cleaning
$ make clean
Code:
rm -f test.exe *.o
make better_storage_maintenance

case 4: look up .c file from .pc file
$ make test.c
Code:
echo test.pc > test.c

(You need to execute "make better_storage_maintenance" at later)
Last edited by p50p100; 08-17-2008 at 08:40 AM..
# 5  
Old 08-17-2008
For GNU make you can also simply mark .c files as .PRECIOUS: so they won't be removed automatically.
# 6  
Old 08-17-2008
I don't know details.

But, do .PRECIOUS option only keep .c file except for temp file ?

My result is it that I really execute it. (And I'm surprized!)

I am not sure that reason why it works.
# 7  
Old 08-17-2008
I'm not sure I understand the question. .PRECIOUS marks a file as one which Make should not remove even if it was created as a temporary step and not as an end goal.
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