libNoise & MinGW

[roadkillguy]

I've been attempting to cross compile an application from ubuntu to windows that uses the libnoise library. Generally, I rename the windows library (libnoise.lib in this case) to a linux library in the /usr/i586mingw32msvc/lib folder. (libnoise.a)

Unfortunately, this hasn't worked. It's not complaining about not finding the library, it's complaining that it cannot find the noise::Module class.


out/BaseBlockTerrain.o:BaseBlockTerrain.cpp:(.text+0xe 2b): undefined reference to `noise::module::Const::Const()'

Is one of the many.


Does anyone know where to find mingw libnoise libraries or what to do at this point?

Thanks

[roadkillguy]

Nobody?

[PaulM1985]

A library that was compiled for windows can't just be renamed to use it on linux. You need to re-compile the source code for linux.

Have you got the source code?

Paul

[roadkillguy]

Using minGW32 to cross compile for ******* I would think that it requires .libs.

When I compile with my linux libraries my program compiles just fine.

How do I go about installing minGW libraries otherwise? They offer next to nothing on their website.

[PaulM1985]

Ah, I didn't see CROSS compile, when I first read your post. I thought you were getting a windows lib and were trying to use it in Linux. Sorry.

To make up I did some searching. I have found some stuff here:

http://libnoise.sourceforge.net/downloads/index.html

where you can download the various bits of source code. Maybe this would help. If you build the source using the cross compiler, you may be able to follow the steps at the bottom of this page:

http://libnoise.sourceforge.net/tutorials/tutorial1.html

To get it to work.

I don't really know anything about cross compilation, I just wanted to try and help since my reply was wrong in the first instance.

Good luck

Paul

[roadkillguy]

I'm still having the same problem.

I've found that when I open up vim and make a bogus libnoise.a file, it tells me I have a syntax error. Clearly it's finding the functions and classes, but not correctly.

I'm kind of sick of mingw32 at this point.

[SledgeHammer_999]

Did you also cross-compile libnoise? If not, you should.

[roadkillguy]

I was actually just trying that.. (unsuccessfully) though I'm not sure what it would do given that the libraries they distribute are already win32.

Should I find a 3D perlin noise function and implement it myself? I do like the wrapper classes libnoise uses though...

[roadkillguy]

Are there any other cross compilers besides mingw32 I should be using? I have the source for libnoise, but I'm clueless as to how to build a ******* library out of it.

[SledgeHammer_999]

Are there any other cross compilers besides mingw32 I should be using? I have the source for libnoise, but I'm clueless as to how to build a ******* library out of it.

None that I am aware of.

BUT a few questions.

1. Do you know how to compile already available projects from source? (the configure-make-make install cycle)? If no, learn how to do it on linux. If yes, keep reading.

2. Have you told to the configure scrpt to use the mingw-gcc and not the systems gcc? If no, then investigate on how to do it. If yes, then it must mean that "make" fails. plz post the error message in that situation.

(do the above steps to compile libnoise from source)

NOTE: when configuring for cross-compilation you should tell the script a local installdir (eg --prefix=$HOME/cross_compile)


If you manage to compile libnoise then you must compile your application using the mingw32-gcc AND make the linker look for the libnoise libs/includes in your local installdir (mentioned above).

[roadkillguy]

I've been able to get libnoise.a generated using g++, but i586-mingw32msvc-g++ hasn't been so lucky.



..blablablapath..$ make libnoise.a CXX=i586-mingw32msvc-g++
libtool --mode=link i586-mingw32msvc-g++ -o libnoise.a ../src/latlon.o ../src/noisegen.o ../src/model/cylinder.o ../src/model/line.o ../src/model/plane.o ../src/model/sphere.o ../src/module/abs.o ../src/module/add.o ../src/module/billow.o ../src/module/blend.o ../src/module/cache.o ../src/module/checkerboard.o ../src/module/clamp.o ../src/module/const.o ../src/module/curve.o ../src/module/cylinders.o ../src/module/displace.o ../src/module/exponent.o ../src/module/invert.o ../src/module/max.o ../src/module/min.o ../src/module/modulebase.o ../src/module/multiply.o ../src/module/perlin.o ../src/module/power.o ../src/module/ridgedmulti.o ../src/module/rotatepoint.o ../src/module/scalebias.o ../src/module/scalepoint.o ../src/module/select.o ../src/module/spheres.o ../src/module/terrace.o ../src/module/translatepoint.o ../src/module/turbulence.o ../src/module/voronoi.o
libtool: link: unable to infer tagged configuration
libtool: link: specify a tag with `--tag'


EDIT: After adding --tag=CXX, I was able to get it to compile. I'm not sure if the library was packaged correctly, because my application still didn't build after that.

Does libtool support windows libraries?

[roadkillguy]

It's still not working.. and I've even been able to get pthreads linking.

Is there a windows equivalent of libtool?:confused:

[roadkillguy]

Progress!! I figured out how to use i586-mingw32msvc-dlltool, and was able to compile libnoise like so:


i586-mingw32msvc-dlltool ../src/latlon.o ../src/noisegen.o ../src/model/cylinder.o ../src/model/line.o ../src/model/plane.o ../src/model/sphere.o ../src/module/abs.o ../src/module/add.o ../src/module/billow.o ../src/module/blend.o ../src/module/cache.o ../src/module/checkerboard.o ../src/module/clamp.o ../src/module/const.o ../src/module/curve.o ../src/module/cylinders.o ../src/module/displace.o ../src/module/exponent.o ../src/module/invert.o ../src/module/max.o ../src/module/min.o ../src/module/modulebase.o ../src/module/multiply.o ../src/module/perlin.o ../src/module/power.o ../src/module/ridgedmulti.o ../src/module/rotatepoint.o ../src/module/scalebias.o ../src/module/scalepoint.o ../src/module/select.o ../src/module/spheres.o ../src/module/terrace.o ../src/module/translatepoint.o ../src/module/turbulence.o ../src/module/voronoi.o --export-all-symbols -l libnoise.a

Linking to libnoise.a, (-lnoise), I was able to get the following (Much different) output.



fu000001.o:(.idata$2+0xc): undefined reference to `_libnoise_a_iname'
fu000004.o:(.idata$2+0xc): undefined reference to `_libnoise_a_iname'
fu000006.o:(.idata$2+0xc): undefined reference to `_libnoise_a_iname'
fu000008.o:(.idata$2+0xc): undefined reference to `_libnoise_a_iname'
fu000010.o:(.idata$2+0xc): undefined reference to `_libnoise_a_iname'
fu000012.o:(.idata$2+0xc): more undefined references to `_libnoise_a_iname' follow
nmth000000.o:(.idata$4+0x0): undefined reference to `__nm___ZTVN5noise6module6PerlinE'
nmth000022.o:(.idata$4+0x0): undefined reference to `__nm___ZTVN5noise6module6SelectE'
nmth000027.o:(.idata$4+0x0): undefined reference to `__nm___ZTVN5noise6module10TurbulenceE'
collect2: ld returned 1 exit status
make: *** [windows] Error 1

Can anybody interpret these errors? I've found error handling is a learned skill.

[roadkillguy]

I've also found that adding -nostartfiles to the linker line produces similar errors.

Anybody?

[roadkillguy]

Despite your relentless effort, I seem to have solved this myself.

Rather than using any kind of libtool or dlltool, I used raw i586-mingw32msvc-g++ commands to create the library. (I'm not really sure what those do anymore)


i586-mingw32msvc-g++ -shared -o libnoise.dll [A bunch of .o files] -Wl,--export-all-symbols -Wl,--out-implib,libnoise.a
Produced a nice libnoise.dll and libnoise.a for use with mingw and my application, which now runs fine under wine.

Thanks for... reading? Hope this helps anybody else cross compiling ubuntu libraries for windows/mingw!