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Today's Topics:

   1. Re: Gem's undefined symbol / need compilation flag ?
      (IOhannes m zmoelnig via Pd-dev)


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Message: 1
Date: Mon, 23 Jun 2014 13:28:07 +0200
From: IOhannes m zmoelnig via Pd-dev <pd-dev@lists.iem.at>
To: pd-dev@lists.iem.at
Subject: Re: [PD-dev] Gem's undefined symbol / need compilation flag ?
Message-ID: <53A80F47.5090707@iem.at>
Content-Type: text/plain; charset=UTF-8

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On 2014-06-19 15:41, Antoine Villeret via Pd-dev wrote:
> hello,
>
> i'm trying to make a new build system for pix_opencv based on
> automake it's mainly inspired by Gem's one
>
> I can make a pix_opencv.l_ia64 on linux but when I tried to load it
> I got : ./pix_opencv.l_ia64: ./pix_opencv.l_ia64: undefined
> symbol: _ZN9GemPixObj4SIMDEi pix_opencv: can't load library
>
> maybe I need some flag to fit the Gem build option, but I can't
> figure out which one. does anybody knows how to link correctly ?

Gem comes with a pkg-config file, that should help you.
but then, there is no magic involved and no special compilation flags
or defines are involved (but make sure you do NOT define GEM_INTERNAL)

anyhow, the problem you are experiencing is usually related to using
Gem-headers that do not match the Gem binary that you use.

e.g. i find that the version of Gem that comes with Debian (0.93.3)
lacks the GemPixObj::SIMD(int) method, but the git version provides it.

so make sure that you load the *correct* version of Gem (the git
version) before loading pix_opencv.

fgmasdr
IOhannes
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