Hi and thank for the review, We have two situations: installing from source (and in this situation it's ok to use /usr/local/) and installation as part generating a *.deb package and here we can't use /usr/local.
I checked my system and lua is installed properly but lua's package.cpath anyway returns /usr/local as first path. What I get from documentation this is properly behavior. So I just decided to set LUAPATH manually and I think that would be ok. Thank you On 11/29/18 6:17 PM, Petr Štetiar wrote: > Sergey Ponomarev <stok...@gmail.com> [2018-11-29 17:20:07]: > > Hi, > >> I'm working on porting openwrt utils like UCI and UHTTPD to Ubuntu and >> trying to create a PPA. >> During creation of a debian package for libubox it's build failed with: >> dh_install: Cannot find (any matches for) >> "/usr/lib/x86_64-linux-gnu/lua/5.1/uloop.so" (tried in ., debian/tmp) >> After investigation it turned out that LUAPATH variable was evaluated as >> /usr/local/lib/lua/5.1 while correct path is >> /usr/lib/x86_64-linux-gnu/lua/5.1. > That's wrong, see bellow. > >> The LUAPATH is evaluated by the command: >> $ lua -e "for k in string.gmatch(package.cpath .. \";\", >> \"([^;]+)/..so;\") do if k:sub(1,1) == \"/\" then print(k) break end end" >> So it looks for array package.cpath and gets a first line which starts with >> / (this is why k:sub(1,1) == \"/\"). >> To see all pathes let's change the command a little bit: >> $ lua -e "for k in string.gmatch(package.cpath .. \";\", >> \"([^;]+)/..so;\") do print(k) end" >> . >> /usr/local/lib/lua/5.1 >> /usr/lib/x86_64-linux-gnu/lua/5.1 >> /usr/lib/lua/5.1 > All 4 paths are valid, Lua would search for dynamic loadable libraries in > those > paths. > >> So on Ubuntu 18.10 and maybe in other distros the LUAPATH variable will >> receive the /usr/local/lib/lua/5.1 as first path. >> To fix that all what we need to do is just to get path which starts with not >> just / but with /usr/lib/ i.e. >> $ lua -e "for k in string.gmatch(package.cpath .. \";\", >> \"([^;]+)/..so;\") do if k:sub(1,9) == \"/usr/lib/\" then print(k) break end >> end" >> So this parch is intended to fix that. > No, this is not a fix, it's a hack for Ubuntu. You're probably breaking half > of > the world where you've stuff usually installed in /usr/local and other > locations, like BSDs (and maybe OSX?) for example: > > ynezz@meh:~$ head -1 /etc/motd > OpenBSD 6.4 (GENERIC) #349: Thu Oct 11 13:25:13 MDT 2018 > > ynezz@meh:~$ lua51 -e "for k in string.gmatch(package.cpath .. \";\", > \"([^;]+)/..so;\") do if k:sub(1,1) == \"/\" then print(k) break end end" > /usr/local/lib/lua/5.1 > > ynezz@meh:~$ lua51 -e "for k in string.gmatch(package.cpath .. \";\", > \"([^;]+)/..so;\") do if k:sub(1,9) == \"/usr/lib/\" then print(k) break end > end" > > -- ynezz _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
