lua woes

[wwood]

Hi,

I'm trying to package newick_utils for the guix package manager, and I'm having some issues building the lua stream editor. First, I think it may require lua <5.2 because luaL_openlib is no longer a thing - see for instance http://stackoverflow.com/questions/19041215/lual-openlib-replacement-for-lua-5-2 .

When using lua-5.1 I get this error:

lua_tree_editor.c:623:37: error: ‘LUA_RIDX_GLOBALS’ undeclared (first use in this function)
   lua_rawgeti(L, LUA_REGISTRYINDEX, LUA_RIDX_GLOBALS);

Any idea?

I've not personally used the lua editor before, I tend to only use the (very useful) C shell tools. I put a full build log at https://gist.github.com/wwood/349e75ed8e0ec627ed77 - there are some deprecation warnings you may or may not be aware of.

Thanks,
ben

[tjunier]

Hi, sorry for the late reply - I have been very busy with other projects these days - I'll look into this ASAP.

Thomas

[wwood]

No problem. Alternatively, should I just package the shell tools?

[tjunier]

Certainly. nw_luaed is more experimental (though it can be pretty handy), from my experience hardly anyone uses it (apart from myself, that is). I'd definitely rather see a package witohut nw_luaed than no package at all.

tThat being said, and having had the time to look into the issue in more detail, I can say that nw_luaed can be linked to liblua5.2, in fact it requires it (I remember trying to support both 5.1 and 5.2 and deciding it wasn't worth it):

$ ldd $(which nw_luaed)
    linux-vdso.so.1 =>  (0x00007ffe3a9eb000)
    libnw.so.0 => /usr/local/lib/libnw.so.0 (0x00007f36b3e82000)
    liblua5.2.so.0 => /usr/lib/x86_64-linux-gnu/liblua5.2.so.0 (0x00007f36b3c51000)

Do you get an error if you try Lua 5.2?

[tjunier]

BTW, thank you for packaging the Newick utils - that's something I always knew I should do, but never got the time to actually get done.

Thomas

[alephreish]

@tjunier you are not alone using nw_luaed :)
Compiles OK with lua5.2 on my machine.

[wwood]

Hi again,

Apologies for the delay, but time hasn't provided a solution. I'm wondering how it might be possible that it seems to work with 5.2 since, according to the 5.1 (let alone 5.2) manual at http://www.lua.org/manual/5.1/manual.html#7

Function luaL_openlib was replaced by luaL_register.

The specific error I am getting when compiling is

...
/gnu/store/b1yqjimbdh5bf9jnizd4h7yf110744j2-bash-4.3.42/bin/bash ../libtool  --tag=CC   --mode=link gcc  -g -O2   -o nw_luaed lua_tree_editor.o libnw.la -llua -lpthread -lxml2 -lm 
libtool: link: gcc -g -O2 -o .libs/nw_luaed lua_tree_editor.o  ./.libs/libnw.so -llua -lpthread /gnu/store/7lxgrhmfgdd303gslaxazmmdv6n1nf77-libxml2-2.9.3/lib/libxml2.so -ldl -lz /gnu/store/z8vgpay1q450ndgil902xxxz5mq0b1qr-xz-5.2.2/lib/liblzma.so -lm -pthread -Wl,-rpath -Wl,/gnu/store/w492hpzd0gmq64w1pa93h9bkq9rilz8y-newick-utils-1.6.1.da12115/lib -Wl,-rpath -Wl,/gnu/store/7lxgrhmfgdd303gslaxazmmdv6n1nf77-libxml2-2.9.3/lib -Wl,-rpath -Wl,/gnu/store/z8vgpay1q450ndgil902xxxz5mq0b1qr-xz-5.2.2/lib
lua_tree_editor.o: In function `luaopen_lnode':
/tmp/nix-build-newick-utils-1.6.1.da12115.drv-1/source/src/lua_tree_editor.c:1000: undefined reference to `luaL_openlib'
collect2: error: ld returned 1 exit status
...

Any ideas? I'm afraid I know next to nothing about lua. It is finding `-llua because previous steps work e.g.

/gnu/store/b1yqjimbdh5bf9jnizd4h7yf110744j2-bash-4.3.42/bin/bash ../libtool  --tag=CC   --mode=link gcc  -g -O2   -o nw_stats stats.o libnw.la -llua -lpthread -lxml2 -lm 
libtool: link: gcc -g -O2 -o .libs/nw_stats stats.o  ./.libs/libnw.so -llua -lpthread /gnu/store/7lxgrhmfgdd303gslaxazmmdv6n1nf77-libxml2-2.9.3/lib/libxml2.so -ldl -lz /gnu/store/z8vgpay1q450ndgil902xxxz5mq0b1qr-xz-5.2.2/lib/liblzma.so -lm -pthread -Wl,-rpath -Wl,/gnu/store/w492hpzd0gmq64w1pa93h9bkq9rilz8y-newick-utils-1.6.1.da12115/lib -Wl,-rpath -Wl,/gnu/store/7lxgrhmfgdd303gslaxazmmdv6n1nf77-libxml2-2.9.3/lib -Wl,-rpath -Wl,/gnu/store/z8vgpay1q450ndgil902xxxz5mq0b1qr-xz-5.2.2/lib
gcc -DHAVE_CONFIG_H -I. -I..   -I/gnu/store/7lxgrhmfgdd303gslaxazmmdv6n1nf77-libxml2-2.9.3/include/libxml2    -g -O2 -MT lua_tree_editor.o -MD -MP -MF .deps/lua_tree_editor.Tpo -c -o lua_tree_editor.o lua_tree_editor.c
mv -f .deps/lua_tree_editor.Tpo .deps/lua_tree_editor.Po

[tjunier]

Unfortunaltely, I'm not sure either. On my machine (Ubuntu 14.04), GCC 4.8.4, I get:

/bin/bash ../libtool  --tag=CC   --mode=link gcc  -g -O2   -o nw_luaed lua_tree_editor.o libnw.la 
-llua5.2 -lpthread -lxml2 -lm 
libtool: link: gcc -g -O2 -o .libs/nw_luaed lua_tree_editor.o  ./.libs/libnw.so -llua5.2 
-lpthread -lxml2 -lm

I have -llua5.2 instead of -llua. That might be the reason. Perhaps you could run the same command manually, substituing -llua52 for -llua, and see what happens.

Thomas