[Vm-dev] building Cog on 64 bits debian

laurent laffont laurent.laffont at gmail.com
Mon Aug 15 07:04:24 UTC 2011


Igor,

I have 32bits version of needed libraries - they are installed by
package libc6-dev-i386 in /usr/lib32

I've created CogDebian64Config and adjust linkFlags / commonCompilerFlags so
I have:

CogDebian64Config new linkFlags
 '-lSM -lICE -ldl -lGL -lpthread -lm -lnsl -lX11 -m32 -L/usr/lib32'

CogDebian64Config new compilerFlags ' -DLSB_FIRST=1 -DUSE_GLOBAL_STRUCT=0
-DCOGMTVM=0 -m32 -L/usr/lib32 -g0 -O2 -msse2 -D_GNU_SOURCE -DNDEBUG
-DITIMER_HEARTBEAT=1
 -DNO_VM_PROFILE=1 -DDEBUGVM=0'


but when I make VERBOSE=1

Linking C shared library /root/securedvm/results/vm-display-null
cd /root/securedvm/build/vm-display-null && /usr/bin/cmake -E
cmake_link_script CMakeFiles/vm-display-null.dir/link.txt --verbose=1
/usr/bin/gcc  -fPIC   -shared -Wl,-soname,vm-display-null -o
/root/securedvm/results/vm-display-null
CMakeFiles/vm-display-null.dir/root/securedvm/platforms/unix/vm-display-null/sqUnixDisplayNull.c.o
-lm -ldl -lpthread
collect2: ld terminated with signal 11 [Segmentation fault]
/usr/bin/ld: i386 architecture of input file
`CMakeFiles/vm-display-null.dir/root/securedvm/platforms/unix/vm-display-null/sqUnixDisplayNull.c.o'
is incompatible with i386:x86-64 output


So it seems compilerFlags are not used for building vm-display-null !!!

Same result if I export CC="gcc -m32"


Flags are used for building CogVM though:

[ 57%] Building C object
JPEGReadWriter2Plugin/CMakeFiles/JPEGReadWriter2Plugin.dir/root/securedvm/platforms/Cross/plugins/JPEGReadWriter2Plugin/jquant2.c.o
cd /root/securedvm/build/JPEGReadWriter2Plugin && /usr/bin/gcc
 -DLSB_FIRST=1 -DUSE_GLOBAL_STRUCT=0 -DCOGMTVM=0 -D_GNU_SOURCE -DNDEBUG
-DITIMER_HEARTBEAT=1 -DNO_VM_PROFILE=1 -DDEBUGVM=0 -DSQUEAK_BUILTIN_PLUGIN
-DLSB_FIRST=1 -DUSE_GLOBAL_STRUCT=0 -DCOGMTVM=0 -D_GNU_SOURCE -DNDEBUG
-DITIMER_HEARTBEAT=1 -DNO_VM_PROFILE=1 -DDEBUGVM=0
-I/root/securedvm/platforms/unix/plugins/B3DAcceleratorPlugin
-I/root/securedvm/platforms/Cross/vm -I/root/securedvm/src/vm
-I/root/securedvm/platforms/unix/vm -I/root/securedvm/build
-I/root/securedvm/src/plugins/JPEGReadWriter2Plugin
-I/root/securedvm/platforms/Cross/plugins/JPEGReadWriter2Plugin
-I/root/securedvm/platforms/unix/plugins/JPEGReadWriter2Plugin   -m32
-L/usr/lib32 -g0 -O2 -msse2 -m32 -L/usr/lib32 -g0 -O2 -msse2 -o
CMakeFiles/JPEGReadWriter2Plugin.dir/root/securedvm/platforms/Cross/plugins/JPEGReadWriter2Plugin/jquant2.c.o
  -c /root/securedvm/platforms/Cross/plugins/JPEGReadWriter2Plugin/jquant2.c


Laurent

On Sun, Aug 14, 2011 at 10:10 PM, Igor Stasenko <siguctua at gmail.com> wrote:

>
> On 14 August 2011 18:39, laurent laffont <laurent.laffont at gmail.com>
> wrote:
> >
> > Thanks Levente.
> > After searching & trying finally I've passed this problem by:
> > mv /usr/bin/gcc /usr/bin/real.gcc
> > and then creating /usr/bin/gcc :
> > #!/bin/sh
> > exec real.gcc -m32 $@
> > and chmod +x /usr/bin/gcc
> >
> > Now I have:
> > [ 94%] Built target vm-display-null
> > Scanning dependencies of target vm-display-X11
> > [ 94%] Building C object
> vm-display-X11/CMakeFiles/vm-display-X11.dir/root/securedvm/platforms/unix/vm-display-X11/sqUnixX11.c.o
> > [ 95%] Building C object
> vm-display-X11/CMakeFiles/vm-display-X11.dir/root/securedvm/platforms/unix/vm-display-X11/sqUnixMozilla.c.o
> > Linking C shared library /root/securedvm/results/vm-display-X11
> > /usr/bin/ld: skipping incompatible
> /usr/lib/gcc/x86_64-linux-gnu/4.4.5/../../../libSM.so when searching for
> -lSM
> > /usr/bin/ld: skipping incompatible
> /usr/lib/gcc/x86_64-linux-gnu/4.4.5/../../../libSM.a when searching for -lSM
> > /usr/bin/ld: skipping incompatible /usr/lib/libSM.so when searching for
> -lSM
> > /usr/bin/ld: skipping incompatible /usr/lib/libSM.a when searching for
> -lSM
> > /usr/bin/ld: cannot find -lSM
> > collect2: ld returned 1 exit status
> >
>
> looks like you don't have 32bit version of this library.
> That's why it refusing to link.
>
> As for compiler options, i don't think that you need to use
> workarounds (like creating real.gcc etc) , because the -m32 flag is
> there:
>
> # This is automatically generated file using CogUnixConfig on 14
> August 2011 10:01:34 pm
> ...
> message("Adding module: vm-sound-null")
> add_definitions( -DLSB_FIRST=1 -DUSE_GLOBAL_STRUCT=0 -DCOGMTVM=0 -m32
> -g0 -O2 -msse2 -D_GNU_SOURCE -DNDEBUG -DITIMER_HEARTBEAT=1
>         -DNO_VM_PROFILE=1 -DDEBUGVM=0)
> ...
>
> Try building using:
>
> make VERBOSE=1
>
> to see what flags are passed to compiler.
>
> And please, create a subclass of CogUnixConfig , like
> Cog32OnDebian64Config
> and play with definitions there.
>
> In image you can do:
>
> Cog32OnDebian64Config generateWithSources
> or
> Cog32OnDebian64Config generate
>
> the difference that first will generate cmake files + source files,
> while second one is only cmake files (takes less than second)
>
> I suspecting that problem with linker flags, which tries to link
> 32-bit output with 64-bit binary.
> It seems that we're missing the flag there that it should use 32-bit
> binary for output.
>
> > Laurent
> >
> > On Sat, Aug 13, 2011 at 4:36 PM, Levente Uzonyi <leves at elte.hu> wrote:
> >>
> >> On Sat, 13 Aug 2011, laurent laffont wrote:
> >>
> >> (no quotes thx to gmail...)
> >>
> >> This issue was discussed several times. The simplest solution is to
> define CC as "gcc -m32" (and optionally CXX as "g++ -m32" if you need g++).
> Another solution is to check how cmake supports cross compilation. IIRC
> autotools has some flags for this.
> >>
> >>
> >> Levente
> >
> >
> >
>
>
>
> --
> Best regards,
> Igor Stasenko AKA sig.
>
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