'undefined reference' generally means that the linker has found
symbols in the .o files that it can't find a reference to. I.e. take
the function 'foo', if myobject.o uses foo() from the bar lib, and the
bar lib is not including the linking, because its not specified or not
in the lib path, the you'll get an 'undefined reference'. Basically
it means it can't find the code that matches a given symbol (i.e.
function, variable, etc).
.hc
On Apr 4, 2011, at 9:33 AM, dmotd wrote:
fwd'd from flext list..
background: i've been working on a new autotools template for flext
based libs and started testing on windows platform with cygwin +
mingw, immediate issues with building flext lib itself.
have any pd-devs experienced this 'undefined reference' issue with
the linker?
i'm testing against millers pd-0.43-0.msw.zip on win2k and winxp
virtualbox images. build logs attached.
cheers,
dmotd
-------- Original Message --------
Subject: Re: [flext] autotools builders - flext and gnu/windows
Date: Mon, 4 Apr 2011 14:27:52 +0200
From: Thomas Grill <g...@grrrr.org>
To: dmotd <inaudi...@simplesuperlativ.es>
CC: fl...@grrrr.org
hi dmotd, many thanks for your efforts,
mingw (gcc 4.5.2):
with both your buildsys (cmd prompt) and autoconf (msys shell),
mingw will build all the static libs, but fails at the linker stage
when building the dynamic library, with a bunch of undefined
references (see attachment).
i have attempted to encourage the build further by passing linker
flags (-Wl,--as-needed and -Wl,--no-undefined *plus numerous others/
combinations*) but nothing seems to make it budge. i'm not sure if
the compiler is being pedantic or i'm just not understanding
something.
I can remember that problem - it is connected to the way how global
variables (like garray_class, s_float etc.) in Pd are defined for the
linker.
I must have found a solution once....
cygwin (gcc 3.4.4)
cygwin breaks with your buildsys due to what appears to be an issue
with the environment (see attachment). with autoconf it acts much
like mingw - it can successfully build static libs but fails to make
the shared dll, a few more undefined references than with mingw (see
attachment).
The flext-build output seems to indicate a c++ namespace problem which
should not be too hard to fix.
The autoconf output seems different, probably a mixture of problems.
i'm not sure if i can spare any time for that soon but it's good to
know the weak spots.
all the best,
Thomas
<flext-autotools-cygwin.txt><flext-build-cygwin.txt><flext-build-
mingw.txt>_______________________________________________
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