[PD] MinGW + Eclipse + MSWIN helloworld

[Hans-Christoph Steiner]

On Thu, 14 Jul 2011 20:15 +0200, "luca paganotti"
<luca.paganotti at gmail.com> wrote:
> On Thu, Jul 14, 2011 at 7:02 PM, Hans-Christoph Steiner
> <hans at at.or.at>wrote:
> 
> >
> > On Thu, 14 Jul 2011 12:44 -0400, "Mathieu Bouchard" <matju at artengine.ca>
> > wrote:
> > > On Thu, 14 Jul 2011, luca paganotti wrote:
> > >
> > > > but ... I get 'undefined reference' (s) for all the pd symbols that are
> > > > used by helloworld.c i.e. pd_new, gensym, class_new, class_addbang,
> > post
> > >
> > > You need to use the -shared option to produce a .so or .DLL file.
> > >
> > > In addition, you need to link with PD.DLL (a Windows-only requirement...
> > > no such equivalent on other platforms).
> >
> > Hey Luca,
> >
> > This is great, that you got this far!  Can you write up a wiki page in
> > the dev section. Don't worry too much about formatting, mostly just get
> > the info in there.
> > http://puredata.info/docs/developer
> >
> 
> I think it's a very trivial thing for a wiki page, I mean is not such a
> great thing ....
> 
> 
> >
> > As for Makefiles, if you use the the Library Template, then the Makefile
> > will work on MinGW, Cygwin, Mac OS X, GNU/Linux, Android, iOS, etc.
> > http://puredata.info/docs/developer/LibraryTemplate
> >
> > .hc
> >
> 
> ok, got the template from svn,
> 
> use it as it is trying to build a 'mycobject' as defined by the code ...
> 
> getting these results in eclipse console:
> 
> **** Build of configuration Default for project mycobject ****
> 
> make all
> Building target: mycobject
> Invoking: MinGW C++ Linker
> g++ -L"C:\Programmi\pd\bin" -o"mycobject"  ./mycobject.o
> -l"C:/Programmi/pd/bin/pd.lib"
> c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../../mingw32/bin/ld.exe:
> cannot
> find -lC:/Programmi/pd/bin/pd.lib
> collect2: ld returned 1 exit status
> make: *** [mycobject] Error 1
> 
> what I really do not understand is that I have my pd.lib file exactly in
> the
> folder were ld on bhalf eclipse searches for it, i.e.
> C:\Programmi\pd\bin\pd.lib
> 
> Anyway I then tryed the hard way from the mingw console issueing a 'make
> all' getting finally a usefull error message:
> 
> Pag at XP-PAG /c/dev/c++/pd-externals/mycobject
> $ make clean
> sed: can't read mycobject-meta.pd: No such file or directory
> sed: can't read mycobject-meta.pd: No such file or directory
> sed: can't read mycobject-meta.pd: No such file or directory
> sed: can't read mycobject-meta.pd: No such file or directory
> sed: can't read mycobject-meta.pd: No such file or directory
> rm -f -- mycobject.o
> rm -f -- mycobject.dll
> rm -f -- mycobject.o
> rm -f -- mycobject.dll
> 
> Pag at XP-PAG /c/dev/c++/pd-externals/mycobject
> $ make all
> sed: can't read mycobject-meta.pd: No such file or directory
> sed: can't read mycobject-meta.pd: No such file or directory
> sed: can't read mycobject-meta.pd: No such file or directory
> sed: can't read mycobject-meta.pd: No such file or directory
> sed: can't read mycobject-meta.pd: No such file or directory
> sed: can't read mycobject-meta.pd: No such file or directory
> cc -I"/c/Programmi/pd/include/pd" -Wall -W -g -DPD -DVERSION='""'
> -mms-bitfields
>  -O3 -funroll-loops -fomit-frame-pointer -o "mycobject.o" -c
>  "mycobject.c"
> /bin/sh: cc: command not found
> make: *** [mycobject.o] Error 127
> 
> perhaps does it means that the compiler command is not defined in the
> makefile?
> 
> I added this line
> 
> CC = gcc
> 
> between the OS = windows and PD_PATH = $(shell cd "$(PROGRAMFILES)"/pd &&
> pwd) lines
> 
> inside the ifeq (MINGW,$(findstring MINGW,$(UNAME))) ... endif  block
> 
> and then got:
> 
> Pag at XP-PAG /c/dev/c++/pd-externals/mycobject
> $ make all
> sed: can't read mycobject-meta.pd: No such file or directory
> sed: can't read mycobject-meta.pd: No such file or directory
> sed: can't read mycobject-meta.pd: No such file or directory
> sed: can't read mycobject-meta.pd: No such file or directory
> sed: can't read mycobject-meta.pd: No such file or directory
> sed: can't read mycobject-meta.pd: No such file or directory
> gcc -I"/c/Programmi/pd/include/pd" -Wall -W -g -DPD -DVERSION='""'
> -mms-bitfield
> s -O3 -funroll-loops -fomit-frame-pointer -o "mycobject.o" -c
> "mycobject.c"
> gcc  -s -shared -Wl,--enable-auto-import -o "mycobject.dll" "mycobject.o"
> -L"/
> c/Programmi/pd/src/" -L"/c/Programmi/pd/bin/" -lpd -lwsock32 -lkernel32
> -luser32
>  -lgdi32
> chmod a-x "mycobject.dll"
> 
> Pag at XP-PAG /c/dev/c++/pd-externals/mycobject
> $
> 
> I got the mycobject dll that runs fine under pd-extended on a windows
> box.
> 
> Still wondering why eclise doen't find my pd.lib
> 
> At least this is working now from the command line.

Perhaps Eclipse sets CFLAGS or LDFLAGS, which is overriding things in
the Makefile?  

About this template, it is oriented around making libraries, so that
includes the meta file for marking the folder as a library.  Setting it
up is simple:

- rename the template folder to the name of your library
- rename template-meta.pd replacing 'template' with the name you just
used for the folder
- edit Makefile and put the library/folder/meta name in the first
variable, LIBRARY_NAME

Now you can set library meta data in the meta file, things like version,
authors, etc.

.hc