Hello,

I need to convert a set of svg files located in the 'svg' directory in a
set of png files located in the 'png' directory.
Suppose the conversion tool is called 'conv', I need to do:
conv svg/image0001.svg png/image0001.png
conv svg/image0002.svg png/image0002.png
conv svg/image0003.svg png/image0003.png
...

How can I automate this with a makefile, in such way that if a svg is
changed then only the corresponding png is regenerated ?
I am using gnu make.

Thanks very much!

Olivier

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Olivier Scalbert <olivier.scalbert@algosyn.com> writes:

> Hello,
>
> I need to convert a set of svg files located in the 'svg' directory in
> a set of png files located in the 'png' directory.
> Suppose the conversion tool is called 'conv', I need to do:
> conv svg/image0001.svg png/image0001.png
> conv svg/image0002.svg png/image0002.png
> conv svg/image0003.svg png/image0003.png
> ...
>
> How can I automate this with a makefile, in such way that if a svg is
> changed then only the corresponding png is regenerated ?
> I am using gnu make.

%.png: %.svg
conv $^ $@

That's a tab on the second line.

--
Måns Rullgård
mru@kth.se

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* Måns Rullgård <mru@kth.se>
| %.png: %.svg

png/%.png: svg/%.svg

?

If I read the OP correctly, the .png and .svg files were meant to go
to different directories...

R'

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Måns Rullgård wrote:

>Olivier Scalbert <olivier.scalbert@algosyn.com> writes:
>
>
> 
>
>%.png: %.svg
>	conv $^ $@
>
>That's a tab on the second line.
>
>
>
Thanks for the answer !
However make says: no targets ans stop ...

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Ralf Fassel <ralfixx@gmx.de> writes:

> * Måns Rullgård <mru@kth.se>
> | %.png: %.svg
>
> png/%.png: svg/%.svg
>
> ?
>
> If I read the OP correctly, the .png and .svg files were meant to go
> to different directories...

Sorry, my mistake.  Your version should work, if I am not mistaken.



--
Måns Rullgård
mru@kth.se

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Olivier Scalbert <olivier.scalbert@algosyn.com> writes:

> Måns Rullgård wrote:
> 
> Thanks for the answer !
> However make says: no targets ans stop ...

You'll need to add the png files as dependencies to some target.  See
also another reply about the different directories for the svg and the
png files.  To convert all svg files into png files you could do
something like this (untested):

PNGS = $(subst svg,png,$(wildcard svg/*.svg))

all: $(PNGS)

png/%.png: svg:%.svg
conv $^ $@

--
Måns Rullgård
mru@kth.se

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Måns Rullgård wrote:

>Olivier Scalbert <olivier.scalbert@algosyn.com> writes:
>
>
> 
>
>You'll need to add the png files as dependencies to some target.  See
>also another reply about the different directories for the svg and the
>png files.  To convert all svg files into png files you could do
>something like this (untested):
>
>PNGS = $(subst svg,png,$(wildcard svg/*.svg))
>
>all: $(PNGS)
>
>png/%.png: svg:%.svg
>	conv $^ $@
>
>
>
Thanks very much, it works perfectly !
Do you know a good book or article on make ?
Thanks
Olivier

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Olivier Scalbert <olivier.scalbert@algosyn.com> writes:
 
> Thanks very much, it works perfectly !
> Do you know a good book or article on make ?

The texinfo manual that comes with gnu make is pretty good.

--
Måns Rullgård
mru@kth.se

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Måns Rullgård wrote:

>Olivier Scalbert <olivier.scalbert@algosyn.com> writes:
>
>
> 
>
>The texinfo manual that comes with gnu make is pretty good.
>
>
>
thx

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Måns Rullgård wrote:
> The texinfo manual that comes with gnu make is pretty good.

Same data, different format:
http://www.gnu.org/software/make/ma..._mono/make.html

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