it's declared as void, not static. extension is inherited from the original code but is not cpp code, afaik.

Ico

On Sun, 2010-12-26 at 20:41 -0800, Hans-Christoph Steiner wrote:

I don't know about C++, but in C that sounds like the setup function
is declared as 'static'.

.hc

On Dec 26, 2010, at 8:35 PM, Ivica Ico Bukvic wrote:

...

Hi all,

I've taken a quick stab at trying to port John Gibson's spectdelay~ external from Max to Pd and got stuck at the following error:

load_object: Symbol "spectdelay_tilde_setup" not found

I have spectdelay_tilde_setup in the code, it is format-wise (TTBOMYK) the same as other signal-based externals. At any rate, I am stuck and unsure how to proceed. Please advise.

build script: gcc -DPD -g -I/usr/local/include/pdl2ork -I../Spectacle -o
spectdelay~.o -c spectdelay~.cpp gcc -o spectdelay~.pd_linux spectdelay~.o -Wall -W -Wstrict-prototypes -Wno-unused -Wno-parentheses -Wno-switch -O6 -funroll-loops -fomit-frame-pointer -fno-strict-aliasing -fPIC -DUNIX -Wl,--export-dynamic-shared ../Spectacle/Spectacle.o ../Spectacle/ SpectacleBase.o ../genlib/Odelay.o ../genlib/Obucket.o ../genlib/ FFTReal.o ../genlib/Offt.o

source file is attached. Bunch of .o files are independent/shared .o files that have been built as follows: gcc -c -o Ooscil.o Ooscil.cpp

Any ideas as to why is this happening?

TIA

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On Sun, 26 Dec 2010, Hans-Christoph Steiner wrote:

I don't know about C++, but in C that sounds like the setup function is declared as 'static'.

C++ symbols aren't like C symbols, as they contain namespace information, type information (of function arguments), etc. They begin with "_Z".

If you want to have spectdelay_tilde_setup in C++, you have to use the «extern "C"» prefix, to prevent C++ from prepending "_Z" and appending what it takes to say "it's a void function"...

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