Re: [ANN] LPeg 0.11

Just installed lua 5.2.2 with: make macosx;make install (working fine it looks).

The to installing lpeg 0.11

Alas, lots of errors. Why?

env gcc -shared -fPIC lpvm.o lpcap.o lptree.o lpcode.o lpprint.o -o lpeg.so

Undefined symbols for architecture x86_64:

"_luaL_addlstring", referenced from:

_stringcap in lpcap.o

_substcap in lpcap.o

"_luaL_addvalue", referenced from:

_addonestring in lpcap.o

…many more…

...

"_lua_typename", referenced from:

_addonestring in lpcap.o

_val2str in lptree.o

ld: symbol(s) not found for architecture x86_64

collect2: ld returned 1 exit status

make: *** [lpeg.so] Error 1

The changed in the makefile to: LUADIR = /usr/include/lua5.2/ (instead of 5.2) idem /usr/local/include: not working

my path values:

LUA_VERSION=5.2

LUA_DIR=/usr/local

LUA_INCL=$LUA_DIR/include

LUA_SHAREDIR=$LUA_DIR/share/lua/$LUA_VERSION

LUA_LIBDIR=$LUA_DIR/lib/lua/$LUA_VERSION

LUA_PATH="./?.lua;./?/?.lua;$LUA_SHAREDIR/?.lua;$LUA_SHAREDIR/?/?.lua"

LUA_CPATH="./?.so;./?/?.so;$LUA_LIBDIR/?.so;$LUA_LIBDIR/?/?.so"

(all exported of course)

Where does it go wrong?

Hans van der Meer

On 27 mrt. 2013, at 20:23, Roberto Ierusalimschy <roberto@inf.puc-rio.br> wrote:

What is LPeg? LPeg is a new (well, not that new now) pattern-matching
library for Lua, based on Parsing _expression_ Grammars (PEGs).

What is new in version 0.11?

+ complete reimplementation of the code generator
+ new syntax for table captures
+ new functions in module 're'
+ other small improvements

Where to get it?

http://www.inf.puc-rio.br/~roberto/lpeg/lpeg-0.11.tar.gz

(The implementation of LPeg became too complex. I spent a long time
trying to document it so that I could understand it again, but in the
end I had to give up and accept that I could not maintain it as it
was. So, I reimplemented the code generator [the real complicated part]
almost from scratch. The new implementation is somewhat larger than the
old one, because now it first creates an AST for each _expression_ and
later compiles the AST into opcodes for the virtual machine. But now I
can understand the optimizations.)

-- Roberto

Hans van der Meer