On Fri, Sep 9, 2011 at 2:46 PM, Patrice Colet <colet.patrice@free.fr> wrote:
Hello, I'm not a C expert but I see errors in your code

----- "Rick T" <ratulloch@gmail.com> a écrit :

> Greetings All
>
>
> I'm having trouble getting my external to work, It compiles with 5
> warnings
> sineq.c:48: warning: unused variable ‘x’
> sineq.c:49: warning: unused variable ‘in1’
> sineq.c:50: warning: unused variable ‘in2’
> sineq.c:51: warning: unused variable ‘in3’
> sineq.c:52: warning: unused variable ‘in4’
>

in http://iem.at/pd/externals-HOWTO/node6.html it's not a t_float but a t_sample for using those variables

True but the variables in my external are floats not samples like in the example pan~ which takes in 2 different signals.  I'm taking in 4 different floats (numbers)

>
> It does a "make" successfully but I get this warning message
> /usr/bin/ld: warning: cannot find entry symbol xport_dynamic;
> defaulting to 00000000000007f0
>

it's certainly caused by your makefile during linking, it's rather export_dynamic, you've certainly made a typo ^^

I thought so to but when I take a look at the make file it looks fine
here's a link to the code in (pastebin)

http://pastebin.com/n6DZivyY


# Makefile
# (c) 2006 IOhannes m zmölnig

# path to pd
## change this according to your setup!
PDROOT=../../../../pd
#PDROOT=/home/zmoelnig/src/pd/

# here we find the sources of pd (and evtl. the pd.lib)
PDSRCDIR=$(PDROOT)/src
PDLIBDIR=$(PDROOT)/bin

# this is the filename-extension
# people have to specify it at the cmdline: eg "make pd_linux"
EXTENSION=$(MAKECMDGOALS)

# if no filename-extension is supplied by the user
# try to guess one, based on what "uname" tells us
UNAME := $(shell uname -s)
ifeq ($(UNAME),Linux)
  DEFAULTEXTENSION= pd_linux
else
  ifeq ($(UNAME),Darwin)
    DEFAULTEXTENSION= pd_darwin
  else
    ifeq (MINGW,$(findstring MINGW,$(UNAME)))
      DEFAULTEXTENSION= pd_nt
    else
      ifeq ($(UNAME),IRIX)
UNAMEV := $(shell uname -R)
ifeq (6.,$(findstring 6.,$(UNAMEV)))
 DEFAULTEXTENSION= pd_irix6
else
 DEFAULTEXTENSION= pd_irix5
endif
      else
DEFAULTEXTENSION=help
      endif
    endif
  endif
endif

# if no extension is given, call "make" again with a guessed extension
auto:
make $(DEFAULTEXTENSION)

# just a stupid fallback
help: 
@echo "choose one command:  make pd_linux (linux), make pd_darwin (osX), make pd_irix5 (IRIX5), make pd_irix6 (IRIX6), make dll (MSVC), make pd_nt (MinWG)"

# delete old build files
clean:
-rm -f *.dll *.pd_* *.o *.obj *~

# we want to compile all C-files we find in the current directory
SOURCES=$(sort $(filter %.c, $(wildcard *.c)))
# each C-files maps will become an external with the given filename-extension
TARGETS=$(SOURCES:.c=.$(EXTENSION))


# ----------------------- Linux -----------------------

pd_linux: $(TARGETS)

LINUXCFLAGS = -DPD -O2 -funroll-loops -fomit-frame-pointer -fPIC \
    -Wall -W -Wshadow -Wstrict-prototypes -Werror \
    -Wno-unused -Wno-parentheses -Wno-switch

LINUXLDFLAGS =  -export_dynamic -shared  -lc -lm

LINUXINCLUDE =  -I$(PDSRCDIR)

%.pd_linux: %.c
$(CC) $(LINUXLDFLAGS) $(LINUXCFLAGS) $(LINUXINCLUDE) -o $*.pd_linux $*.c
strip --strip-unneeded $*.pd_linux



# ----------------------- Mac OSX -----------------------

pd_darwin: $(TARGETS)

DARWINCFLAGS = -DPD -O2 -Wall -W -Wshadow -Wstrict-prototypes \
    -Wno-unused -Wno-parentheses -Wno-switch

DARWININCLUDE = -I$(PDSRCDIR)

DARWINLDFLAGS = -bundle -undefined suppress -flat_namespace

%.pd_darwin: %.c
$(CC) $(DARWINCFLAGS) $(DARWININCLUDE) $(DARWINLDFLAGS) -o $*.pd_darwin $*.c


# ----------------------- IRIX 5.x -----------------------
pd_irix5: $(TARGETS)

SGICFLAGS5 = -o32 -DPD -DSGI -O2

SGIINCLUDE =  -I$(PDSRCDIR)

SGILDFLAGS =  -elf -shared -rdata_shared

%.pd_irix5: %.c
$(CC) $(SGICFLAGS5) $(SGIINCLUDE) -o $*.o -c $*.c
$(LD) $(SGILDFLAGS) -o $*.pd_irix5 $*.o
rm $*.o


# ----------------------- IRIX 6.x -----------------------
pd_irix6: $(TARGETS)

SGICFLAGS6 = -DPD -DSGI -n32 \
-OPT:roundoff=3 -OPT:IEEE_arithmetic=3 -OPT:cray_ivdep=true \
-Ofast=ip32

%.pd_irix6: %.c
$(CC) $(SGICFLAGS6) $(SGIINCLUDE) -o $*.o -c $*.c
$(LD) $(SGILDFLAGS) -o $*.pd_irix6 $*.o
rm $*.o


# ----------------------- NT -----------------------
dll: $(TARGETS)

PDNTCFLAGS = /W3 /WX /DPD /DNT /D__WIN32__ /DMSW /nologo

VC="C:\Programme\Microsoft Visual Studio\Vc98"

PDNTINCLUDE = /I. /I$(PDROOT)\tcl\include /I$(PDSRCDIR)\src /I$(VC)\include

PDNTLDIR = $(VC)\lib

PDNTLIB = $(PDNTLDIR)\libc.lib \
$(PDNTLDIR)\oldnames.lib \
$(PDNTLDIR)\kernel32.lib \
$(PDLIBDIR)\pd.lib 

%.dll: %.c
cl $(PDNTCFLAGS) $(PDNTINCLUDE) /c $*.c
link /dll /export:$*_setup $*.obj $(PDNTLIB)


pd_nt: $(TARGETS)

MINGWCFLAGS = -DPD -O2 -funroll-loops -fomit-frame-pointer \
    -Wall -W -Wshadow -Wstrict-prototypes -Werror \
    -Wno-unused -Wno-parentheses -Wno-switch -mms-bitfields

MINGWLDFLAGS =  -export_dynamic -shared -lm -lkernel32 -lcoldname -lcrtdll -lpd -L$(PDLIBDIR)

MINGWINCLUDE =  -I$(PDSRCDIR)

%.pd_nt: %.c
$(CC) $(MINGWLDFLAGS) $(MINGWCFLAGS) $(MINGWINCLUDE) -o $*.dll $*.c



>
> but when I try and add it in PD it says "couldn't create". I've looked
> at the pan~ tutorial and the d_osc.c file as recommended, which did
> help. I tried to take pieces from the two which I thought were
> applicable to my situation but I'm still having some issues.
>

maybe a little look into bassmu~ source code could also be interesting

Do you know the name for the source file or know where I can find it?  I typed in bassmu~
in PD and nothing came back.


>
> Here's a link to the workflow (dropbox)
> http://dl.dropbox.com/u/6576402/questions/pd/Sine_EQ_Diagram.jpg
>
>
> Here's a link to the C code online (pastebin)
> http://pastebin.com/9rK3szUE
>
>
>
>
> My external is a reproduction of the sinewave equation with 4 inputs
> and one output my logic is to have 4 inlets one for the
> frequency,amplitude,phase and vertical offset and an output for the
> created signal. Granted this isn't the final equation but this will
> help me understand how to create the full equation once done. If you
> want to see the full equation I'll be using here's a link to it below.
> Basically it's a 1 second periodic signal with the sample rate at
> 44100 which the equation gives me control over the
> frequency,amplitude,phase and vertical offset, which will be
> controlled by a usb midi controller.
>
>
> Another question I have is what do I use for the t (time) for my final
> equation is that the t_sample object in PD? or do I need to create a
> for loop counting from 1-44100 for a 1 second 44100 sampled equation?
>
>
> http://dl.dropbox.com/u/6576402/questions/eq1.txt
>
>
>
>
> PS: I'm compiling on ubuntu 10.04 using gcc
>
> On Sun, Sep 4, 2011 at 12:13 PM, Martin Peach <
> martin.peach@sympatico.ca > wrote:
>
>
> On 2011-09-04 16:52, Rick T wrote:
> ...
>
>
>
>
> I've been able to find instructions on how to create a hello world
> C-external but not one that creates a simple sine wave from a sinewave
> equation like A*sin(w*t+p)
> ( https://secure.wikimedia.org/ wikipedia/en/wiki/Sine_wave ) Does
> anyone
> have one or know where to find one.
>
> The canonical reference is here:
> http://iem.at/pd/externals- HOWTO/node6.html
> You just need to plug your equation into the perform routine.
> Also check the source for osc~ in d_osc.c of the Pd source, which uses
> a fancy 32-bit float cosine table scanning method that was useful when
> it mattered but is getting obsolete as a call to sin() is probably
> just as fast nowadays.
>
> Martin
>
>
>
>
>
>
> _______________________________________________
> Pd-dev mailing list
> Pd-dev@iem.at
> http://lists.puredata.info/listinfo/pd-dev

--
Patrice Colet


Aloha
and thanks for the help every bit helps
--