invalid ELF header error

[exebetche]

Hi,
I compiled lgi on Ubuntu 14.04 32 bits and with lua 5.2.3 without error, but when I try to run an example, I get this:

lua: error loading module 'lgi.corelgilua51' from file '/home/user/rocks/share/lua/5.2/lgi.lua':
    /home/user/rocks/share/lua/5.2/lgi.lua: invalid ELF header
stack traceback:
    [C]: in ?
    [C]: in function 'require'
    /home/user/rocks/share/lua/5.2/lgi/core.lua:14: in main chunk
    [C]: in function 'require'
    /home/user/rocks/share/lua/5.2/lgi/init.lua:18: in main chunk
    [C]: in function 'require'
    /home/user/rocks/share/lua/5.2/lgi.lua:19: in main chunk
    [C]: in function 'require'
    cairo.lua:12: in main chunk
    [C]: in ?

I thought it was somehow compiled as 64-bits but it's not:

$ file corelgilua51.so 
corelgilua51.so: ELF 32-bit LSB  shared object, Intel 80386, version 1 (SYSV), dynamically linked, BuildID[sha1]=41fb50617b1c73293a4151f69f7c4bca501feb75, not stripped

Here is the output of the luarocks command in case it helps:

$ luarocks install lgi
Installing http://www.luarocks.org/repositories/rocks/lgi-0.8.0-1.src.rock...
Using http://www.luarocks.org/repositories/rocks/lgi-0.8.0-1.src.rock... switching to 'build' mode
make -C lgi
make[1]: entrant dans le répertoire « /tmp/luarocks_lgi-0.8.0-1-2973/lgi/lgi »
pkg-config --exists 'gobject-introspection-1.0 >= 0.10.8' --print-errors
touch .depcheck
gcc -fPIC  -O2 -fPIC -I/usr/include/lua5.2 -pthread -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/gobject-introspection-1.0   -Wall -Wextra -O2 -g -c -o buffer.o buffer.c
gcc -fPIC  -O2 -fPIC -I/usr/include/lua5.2 -pthread -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/gobject-introspection-1.0   -Wall -Wextra -O2 -g -c -o callable.o callable.c
gcc -fPIC  -O2 -fPIC -I/usr/include/lua5.2 -pthread -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/gobject-introspection-1.0   -Wall -Wextra -O2 -g -c -o core.o core.c
gcc -fPIC  -O2 -fPIC -I/usr/include/lua5.2 -pthread -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/gobject-introspection-1.0   -Wall -Wextra -O2 -g -c -o gi.o gi.c
gcc -fPIC  -O2 -fPIC -I/usr/include/lua5.2 -pthread -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/gobject-introspection-1.0   -Wall -Wextra -O2 -g -c -o marshal.o marshal.c
gcc -fPIC  -O2 -fPIC -I/usr/include/lua5.2 -pthread -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/gobject-introspection-1.0   -Wall -Wextra -O2 -g -c -o object.o object.c
gcc -fPIC  -O2 -fPIC -I/usr/include/lua5.2 -pthread -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/gobject-introspection-1.0   -Wall -Wextra -O2 -g -c -o record.o record.c
gcc -shared  -o corelgilua51.so buffer.o callable.o core.o gi.o marshal.o object.o record.o -Wl,--export-dynamic -pthread -lgirepository-1.0 -lgobject-2.0 -lgmodule-2.0 -lglib-2.0 -lffi  
echo "return '0.8.0'" > version.lua
make[1]: quittant le répertoire « /tmp/luarocks_lgi-0.8.0-1-2973/lgi/lgi »
make -C lgi install
make[1]: entrant dans le répertoire « /tmp/luarocks_lgi-0.8.0-1-2973/lgi/lgi »
mkdir -p /home/user/rocks/lib/luarocks/rocks/lgi/0.8.0-1/lib/lgi
cp corelgilua51.so /home/user/rocks/lib/luarocks/rocks/lgi/0.8.0-1/lib/lgi
mkdir -p /home/user/rocks/lib/luarocks/rocks/lgi/0.8.0-1/lua
cp ../lgi.lua /home/user/rocks/lib/luarocks/rocks/lgi/0.8.0-1/lua
mkdir -p /home/user/rocks/lib/luarocks/rocks/lgi/0.8.0-1/lua/lgi
cp class.lua component.lua core.lua enum.lua ffi.lua init.lua log.lua namespace.lua package.lua record.lua version.lua version.lua /home/user/rocks/lib/luarocks/rocks/lgi/0.8.0-1/lua/lgi
cp: avertissement : le fichier source «version.lua» est mentionné plusieurs fois
mkdir -p /home/user/rocks/lib/luarocks/rocks/lgi/0.8.0-1/lua/lgi/override
cp override/cairo.lua override/Clutter.lua override/Gdk.lua override/Gio-DBus.lua override/Gio.lua override/GLib-Bytes.lua override/GLib-Error.lua override/GLib.lua override/GLib-Markup.lua override/GLib-Timer.lua override/GLib-Variant.lua override/GObject-Closure.lua override/GObject-Object.lua override/GObject-Type.lua override/GObject-Value.lua override/Gst.lua override/Gtk.lua override/PangoCairo.lua override/Pango.lua /home/user/rocks/lib/luarocks/rocks/lgi/0.8.0-1/lua/lgi/override
make[1]: quittant le répertoire « /tmp/luarocks_lgi-0.8.0-1-2973/lgi/lgi »
Updating manifest for /home/user/rocks/lib/luarocks/rocks

lgi 0.8.0-1 is now built and installed in /home/user/rocks (license: MIT/X11)

Thank you.

[pavouk]

This is really strange. From this message

/home/user/rocks/share/lua/5.2/lgi.lua: invalid ELF header

it looks as if Lua is trying to load lgi.lua as ELF binary *which must fail, since it is actually Lua source), but I'm completely clueless why is this happening.

I also noticed the line:
cp: avertissement : le fichier source «version.lua» est mentionné plusieurs fois

Could it be that you are overwriting lgi install tree where some remnants of previous installs are? Would installing into clear tree help?

[exebetche]

Thank's, you 're right, I think I used a "package.path" instead of "package.cpath" to link the library in the sample file, sorry about that.
About the cp warning, "version.lua" is indeed mentioned twice in the command (one line up). I think it is captured in both $(CORESOURCES) and $(VERSION_FILE) in ./lgi/lgi/Makefile:
cp $(CORESOURCES) $(VERSION_FILE) $(DESTDIR)$(LUA_SHAREDIR)/lgi

Anyway, thanks for your help.