On Raspbian, two SDL library files must be linked to /usr/lib/

[Marcos Cruz]

In order to compile CanAce on Raspbian, the following links are needed:

ln -s /usr/lib/arm-linux-gnueabihf/libSDLmain.a /usr/lib
ln -s /usr/lib/arm-linux-gnueabihf/libSDL.so /usr/lib

Maybe there's a cleaner solution, but this one works.

Marcos

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[Lawrence Woodman]

On 08/02/13 18:38, Marcos Cruz wrote:
> In order to compile CanAce on Raspbian, the following links are needed:
>
> ln -s /usr/lib/arm-linux-gnueabihf/libSDLmain.a /usr/lib
> ln -s /usr/lib/arm-linux-gnueabihf/libSDL.so /usr/lib
>
> Maybe there's a cleaner solution, but this one works.

Thanks for the warning.

I'm not sure why this directory isn't in the library path, but you could
add it by adding the following to /etc/ld.so.conf or create a file
called /etc/ld.so.conf.d/gnueabihf.conf with the following content.
Where to put it depends on whether your /etc/ld.so.conf includes files
from /etc/ld.so.conf.d/:
# Configuration for gnueabihf
/usr/lib/arm-linux-gnueabihf

Then, as root, run:
# ldconfig

Your would need to remove the symbolic links to test whether this has
worked.


bfn


Lorry

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[Marcos Cruz]

En/Je/On 2013-02-11 07:19, Lawrence Woodman escribi� / skribis / wrote :

> >ln -s /usr/lib/arm-linux-gnueabihf/libSDLmain.a /usr/lib
> >ln -s /usr/lib/arm-linux-gnueabihf/libSDL.so /usr/lib
> >
> >Maybe there's a cleaner solution, but this one works.

> I'm not sure why this directory isn't in the library path, but you
> could add it by adding the following to /etc/ld.so.conf or create a
> file called /etc/ld.so.conf.d/gnueabihf.conf with the following
> content.

Thank you for the info. I didn't know how this works. Everything you say
seems properly configured by default, see:

My </etc/ld.so.conf> file:

include /etc/ld.so.conf.d/*.conf

My </etc/ld.so.conf.d/> dir:

00-vmcs.conf
arm-linux-gnueabihf.conf
libc.conf

My </etc/ld.so.conf/arm-linux-gnueabihf.conf> file:

# Multiarch support
/lib/arm-linux-gnueabihf

/usr/lib/arm-linux-gnueabihf

> Then, as root, run:
> # ldconfig

> Your would need to remove the symbolic links to test whether this
> has worked.

It doesn't work without my symbolic links. 'make' fails with the message
"no rule to build the objective '/usr/lib/libSDLmain.a', needed by
'src/canace'".

I thougth the cause could be '/usr/lib/libSDLmain.a' is hardcoded in the
source. I tried this:

grep SDLmain src/*

The result was:

src/CMakeCache.txt:SDLMAIN_LIBRARY:FILEPATH=/usr/lib/arm-linux-gnueabihf/libSDLmain.a
src/CMakeCache.txt:SDL_LIBRARY:STRING=/usr/lib/arm-linux-gnueabihf/libSDLmain.a;/usr/lib/arm-linux-gnueabihf/libSDL.so;-lpthread
src/CMakeCache.txt:FIND_PACKAGE_MESSAGE_DETAILS_SDL:INTERNAL=[/usr/lib/arm-linux-gnueabihf/libSDLmain.a;/usr/lib/arm-linux-gnueabihf/libSDL.so;-lpthread][/usr/include/SDL][v()]
src/CMakeCache.txt:SDL_LIBRARY_TEMP:INTERNAL=/usr/lib/arm-linux-gnueabihf/libSDLmain.a;/usr/lib/arm-linux-gnueabihf/libSDL.so;-lpthread

I didn't investigate any further yet. Meanwhile I'll use the symbolic links.

Marcos

[Lawrence Woodman]

On 26/02/13 14:36, Marcos Cruz wrote:
> En/Je/On 2013-02-11 07:19, Lawrence Woodman escribi� / skribis / wrote :
> It doesn't work without my symbolic links. 'make' fails with the message
> "no rule to build the objective '/usr/lib/libSDLmain.a', needed by
> 'src/canace'".
>
> I thougth the cause could be '/usr/lib/libSDLmain.a' is hardcoded in the
> source. I tried this:
>
> grep SDLmain src/*
>
> The result was:
>
> src/CMakeCache.txt:SDLMAIN_LIBRARY:FILEPATH=/usr/lib/arm-linux-gnueabihf/libSDLmain.a
> src/CMakeCache.txt:SDL_LIBRARY:STRING=/usr/lib/arm-linux-gnueabihf/libSDLmain.a;/usr/lib/arm-linux-gnueabihf/libSDL.so;-lpthread

> src/CMakeCache.txt:FIND_PACKAGE_MESSAGE_DETAILS_SDL:INTERNAL=[/usr/lib/arm-linux-gnueabihf/libSDLmain.a;/usr/lib/arm-linux-gnueabihf/libSDL.so;-lpthread][/usr /include/SDL][v()]

> src/CMakeCache.txt:SDL_LIBRARY_TEMP:INTERNAL=/usr/lib/arm-linux-gnueabihf/libSDLmain.a;/usr/lib/arm-linux-gnueabihf/libSDL.so;-lpthread

I'm not sure about this, it does seem to be trying to statically link
libSDL. Now that you have ensured that ldconfig is configured properly,
you could try removing the symbolic links and re-running:
$ cmake .

then:
$ make

Maybe cmake, needs to see that you can now access the shared libraries.

But as I say it's only a stab in the dark.


Lorry

[Marcos Cruz]

En/Je/On 2013-02-28 20:07, Lawrence Woodman escribi� / skribis / wrote :

> you could try removing the symbolic links and re-running:
> $ cmake .
> then:
> $ make

I already had tried. Same error. It's a mistery!

Marcos

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