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vivi
Joined: 08 Jul 2009
Posts: 7
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 Posted: Wed Jul 08, 2009 8:37 am Post subject: How should this be placed in a makefile? |
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Hi, this compiles and works fine, but I'm not sure how to put this into a Makefile.
| Code: |
spu-gcc-4.3 spe_example.c -o spe_example;
embedspu test_handle spe_example spe_example_csf.o;
gcc ppe_example.c spe_example_csf.o -lspe2 -o example;
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Here is my attempt so far
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CC=gcc
CFLAGS=-g -Wall
SPUGCC=spu-gcc-4.3
example: ppe_example.c spe_example_csf.o
$(CC) $(CFLAGS) ppe_example.c spe_example_csf.o -lspe2 -o example
embedspu test_handle spe_example spe_example_csf.o
spe_example: spe_example.c
$(SPUGCC) spe_example.c -o spe_example
clean:
rm -rf spe_example_csf.o example spe_example |
With regards to it's background, It's just some test code using all the cores on the PS3
http://www.ibm.com/developerworks/library/pa-libspe2/
(Ignore the differences, much to my annoyance i found that Debian has different naming conventions from what was written in the guide.)
Thanks! |
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jimparis
Joined: 10 Jun 2005
Posts: 1179
Location: Boston
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| Posted: Thu Jul 09, 2009 5:24 am Post subject: |
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this three step process
| Code: |
spu-gcc-4.3 spe_example.c -o spe_example
embedspu test_handle spe_example spe_example_csf.o
gcc ppe_example.c spe_example_csf.o -lspe2 -o example;
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would be expressed in a Makefile as three dependency rules:
| Code: | all:
example
spe_example: spe_example.c
spu-gcc-4.3 spe_example.c -o spe_example
spe_example_csf.o: spe_example
embedspu test_handle spe_example spe_example_csf.o
example: ppe_example.c spe_example_csf.o
gcc ppe_example.c spe_example_csf.o -lspe2 -o example
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vivi
Joined: 08 Jul 2009
Posts: 7
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| Posted: Fri Jul 10, 2009 1:57 am Post subject: |
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hmm, recieving error 127 when i try to use that makefile. I'm baffled, does anyone have any more attempts. Placing the commands
| Code: | spu-gcc-4.3 spe_example.c -o spe_example
embedspu test_handle spe_example spe_example_csf.o
gcc ppe_example.c spe_example_csf.o -lspe2 -o example; |
in an sh file feels and seems sloppy, so i would really like to be able to find out how it is placed in a makefile. Thanks for your help so far jimparis ^^ |
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J.F.
Joined: 22 Feb 2004
Posts: 2906
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| Posted: Fri Jul 10, 2009 4:00 am Post subject: |
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| The makefile shown IS the proper way to do it. You just need to figure out what the error is... probably a whitespace problem. Make doesn't like leading spaces - only leading tabs are allowed. Look for any lines that start with one or more spaces and replace them with tabs. |
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jimparis
Joined: 10 Jun 2005
Posts: 1179
Location: Boston
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| Posted: Fri Jul 10, 2009 4:34 am Post subject: |
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Sorry, that first rule should be
notAlso, what JF said. |
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vivi
Joined: 08 Jul 2009
Posts: 7
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| Posted: Wed Jul 29, 2009 3:51 am Post subject: |
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Came back to it later and and solved it after reading more about creating makefiles and playing around. I think that the problem was that the makefiles suggested were in reverse. Here is the working copy which includes am extra spe program. Thanks for the help :)
| Code: |
CC = gcc -Wall
SPU-GCC = spu-gcc-4.3
ESPU = embedspu
DEBUG = -ggdb3
example: ppe_example.c spe_example_csf.o spe_example_csf2.o
$(CC) ppe_example.c spe_example_csf.o spe_example_csf2.o -lspe2 -o example
spe_example_csf2.o: spe_example2
$(ESPU) test_handle_2 spe_example2 spe_example_csf2.o
spe_example_csf.o: spe_example
$(ESPU) test_handle spe_example spe_example_csf.o
spe_example2:
$(SPU-GCC) spe_example2.c -o spe_example2
spe_example:
$(SPU-GCC) spe_example.c -o spe_example
clean:
rm spe_example spe_example2 spe_example_csf2.o spe_example_csf.o example
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jimparis
Joined: 10 Jun 2005
Posts: 1179
Location: Boston
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| Posted: Wed Jul 29, 2009 4:52 am Post subject: |
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| The rule order doesn't actually if the Makefile expresses all of the dependencies correctly. Yours is almost correct, but you forgot to list spu_example.c as a dependency of spu_example. Similarly for spu_example2. |
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vivi
Joined: 08 Jul 2009
Posts: 7
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| Posted: Thu Jul 30, 2009 11:44 am Post subject: |
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| Ah, yeah should have wrote the dependancies. It still compiled without them though. Is including the source files as dependencies just to make it easier for the human programmer? |
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jimparis
Joined: 10 Jun 2005
Posts: 1179
Location: Boston
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| Posted: Tue Aug 11, 2009 1:51 pm Post subject: |
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| Including all dependencies is done so that "make" works correctly. As you noticed, without proper dependencies, it can fail if (for example) the rules are in a different order. |
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