LuaRocks fPIC error

Question

I'm trying to install numlua with luarocks:

luarocks make numlua-0.3-1.rockspec

but am getting the following error:

/usr/bin/ld: numlua.o: relocation R_X86_64_32 against `.bss' can not be used when making a shared object; recompile with -fPIC
numlua.o: could not read symbols: Bad value
collect2: ld returned 1 exit status
cp: cannot stat `numlua.so': No such file or directory

I'm guessing I need to add the -fPIC argument as a flag but not being great with compilers and a first-timer with luaRocks I'm not sure how or where to add this, or, if there is something else I'm doing wrong. Any help would be appreciated!

Answer 1

Per this mailing list discussion, it looks like LuaRocks is configured for a 32-bit system while actually running on a 64-bit system. It's likely that you installed it via a package manager, as this shouldn't happen when installed from source.

Find your luarocks/config.lua file. On my Ubuntu 11.10 system, it was located at /usr/share/lua/5.1/luarocks/config.lua. Find the line that says LUAROCKS_UNAME_M and change the i686 to x86_64.

Now that luarocks knows it's on a 64-bit machine, numlua should compile fine.