Extensions and ActiveTcl
in [TCL]
|
Prev: Compressing a file (in windows) -sorry for the triple-post
Next: How top create starpack with multiple tcl files and other packages
From: Alan Grunwald on 25 Jul 2010 13:10 I've decided that I'd be best off writing some code that I need in C and provide it as a package. So, I found wiki.tcl.tk/11153 - Hello World as a C extension. I've built hello.so, but % load ./libhello.so fails with couldn't load file "./libhello.so": ./libhello.so: undefined symbol: tclStubsPtr I'm using Tcl 8.6b1.2, on Ubuntu Linux, installed in /opt/ActiveTcl-8.6. I built libhello.so with the command $ gcc -shared -o libhello.so -DUSE_TCL_STUBS -I/opt/ActiveTcl-8.6/include/tcl8.6 hello.c -Ltclstub8.6 Can someone provide a pointer to what I'm doing wrong? Many thanks, -- Alan
From: Aric Bills on 26 Jul 2010 01:27 On Jul 25, 11:10 am, Alan Grunwald <alan-clt- pos...(a)nospam.demon.co.uk> wrote: > I've decided that I'd be best off writing some code that I need in C > and provide it as a package. > > So, I found wiki.tcl.tk/11153 - Hello World as a C extension. I've > built hello.so, but > > % load ./libhello.so > > fails with > > couldn't load file "./libhello.so": ./libhello.so: undefined symbol: > tclStubsPtr > > I'm using Tcl 8.6b1.2, on Ubuntu Linux, installed in > /opt/ActiveTcl-8.6. I built libhello.so with the command > > $ gcc -shared -o libhello.so -DUSE_TCL_STUBS > -I/opt/ActiveTcl-8.6/include/tcl8.6 hello.c -Ltclstub8.6 > > Can someone provide a pointer to what I'm doing wrong? > > Many thanks, > -- > Alan I believe the call to gcc should go like this: gcc -shared -o libhello.so -DUSE_TCL_STUBS \ -I/opt/ActiveTcl-8.6/include hello.c \ -L/opt/ActiveTcl-8.6/lib -ltclstub8.6
From: hae on 26 Jul 2010 01:59 On 25 Jul., 19:10, Alan Grunwald <alan-clt-pos...(a)nospam.demon.co.uk> wrote: > I've decided that I'd be best off writing some code that I need in C > and provide it as a package. > > So, I found wiki.tcl.tk/11153 - Hello World as a C extension. I've > built hello.so, but > > % load ./libhello.so > > fails with > > couldn't load file "./libhello.so": ./libhello.so: undefined symbol: > tclStubsPtr > > I'm using Tcl 8.6b1.2, on Ubuntu Linux, installed in > /opt/ActiveTcl-8.6. I built libhello.so with the command > > $ gcc -shared -o libhello.so -DUSE_TCL_STUBS > -I/opt/ActiveTcl-8.6/include/tcl8.6 hello.c -Ltclstub8.6 > > Can someone provide a pointer to what I'm doing wrong? > > Many thanks, > -- > Alan Hello Alan, there is a sample extension that uses the standard tools autoconf, configure and make. See here http://wiki.tcl.tk/5464 and here http://wiki.tcl.tk/14150 for information. Rüdiger
From: Alan Grunwald on 26 Jul 2010 05:17 On 26/07/10 06:27, Aric Bills wrote: > On Jul 25, 11:10 am, Alan Grunwald<alan-clt- > pos...(a)nospam.demon.co.uk> wrote: >> I've decided that I'd be best off writing some code that I need in C >> and provide it as a package. >> >> So, I found wiki.tcl.tk/11153 - Hello World as a C extension. I've >> built hello.so, but >> >> % load ./libhello.so >> >> fails with >> >> couldn't load file "./libhello.so": ./libhello.so: undefined symbol: >> tclStubsPtr >> >> I'm using Tcl 8.6b1.2, on Ubuntu Linux, installed in >> /opt/ActiveTcl-8.6. I built libhello.so with the command >> >> $ gcc -shared -o libhello.so -DUSE_TCL_STUBS >> -I/opt/ActiveTcl-8.6/include/tcl8.6 hello.c -Ltclstub8.6 >> >> Can someone provide a pointer to what I'm doing wrong? >> >> Many thanks, >> -- >> Alan > > I believe the call to gcc should go like this: > > gcc -shared -o libhello.so -DUSE_TCL_STUBS \ > -I/opt/ActiveTcl-8.6/include hello.c \ > -L/opt/ActiveTcl-8.6/lib -ltclstub8.6 Many, many thanks Aric. That should indeed be the command line. I don't know how many times I compared what I'd written with what is on the wiki without spotting it. I guess I should have set up TCLINC and TCLLIB environment variables and used exactly what was on the wiki. Anyway, it's working now, thanks again. PS I guess this will be only the first of a number of embarrassing newbie questions. :-( -- Alan
From: Larry W. Virden on 26 Jul 2010 09:07
On Jul 26, 5:17 am, Alan Grunwald <alan-clt-pos...(a)nospam.demon.co.uk> wrote: > > PS I guess this will be only the first of a number of embarrassing > newbie questions. :-( While embarassing, please don't let the embarassment prevent you from asking after you've tried to find the answers. It is better to ask and get an answer than to give up because you couldn't find the answer. |