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From: courierdavid@hotmail.com
Newsgroups: comp.lang.awk
Subject: Re: Compiling gawk extensions under Cygwin
Date: 14 Mar 2005 20:47:09 -0800
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Thanks for your help there Michael. I wouldn't have thought of that one
myself without your help :-)
Anyway - for those who must stick with Cygwin here's a method that
works using the mingw32 makefiles and some modifications:
Basically you need to extract all exportable symbol names from the
gawk.exe file into a text file and then create a dummy library file
which we can link against on Cygwin. You then throw the library file
away because in reality we use the gawk.exe file as the provider of
those functions.
1. First grab the gawk source, e.g. gawk-3.1.4.tar.bz2 and decompress
it.
2. Move to the gawk-3.1.4 directory you just created.
3. cp pc/* . (copy the pc directory into the main one)
4. edit makefile - uncomment lines "DYN_FLAGS", "DYN_EXP", "DYN_OBJ"
and "DYN_MAKEXP=$(DMEmingw32)
5. make mingw32 (make a gawk.exe)
6. run "gcc -o gawk.exe array.o builtin.o eval.o field.o gawkmisc.o
io.o main.o ext.o msg.o node.o profile.o re.o version.o dlfcn.o
gawk.exp awkgram.o getid.o popen.o getopt.o getopt1.o dfa.o regex.o
random.o" (i.e. remove the -s from the compile command from the
makefile so the symbols are left in gawk.exe)
now export all symbols from gawk.exe into foo.def so that we can put
these in our library
7. echo EXPORTS > foo.def
8. nm gawk.exe | grep -E ' [TBD] _' | sed 's/.* [TBD] _//' >> foo.def
9. cp foo.def gawkw32.def
build the new library with all symbols included
10. make mingw32
Now you will see a file "libgawk.a" which you can link against to
create extensions. For example to build an extension called "file" run:
gcc -shared -dll -DHAVE_CONFIG_H -I . extension/file.c -o file.dll -L .
-lgawk
Then you can load it in gawk using the expression:
extension("./file.dll", "dlload");
You must use the gawk you compiled from source though. It won't work
with any other gawk unfortunately :-( But that's OK because the
stripped gawk is not too big in size.
Cheers,
Dave.
Michael Heiming wrote:
> In comp.lang.awk David Smith <courierdavid@hotmail.com>:
> > Has anyone managed to compile gawk extensions (such as "filefuncs")
> > under Cygwin?
>
> Solution is pretty simple, install a real OS, Linux/*BSD or any
> other unix and this and further problems won't happen.
>
> Good luck
>
> --
> Michael Heiming (X-PGP-Sig > GPG-Key ID: EDD27B94)
> mail: echo zvpunry@urvzvat.qr | perl -pe 'y/a-z/n-za-m/'
> #bofh excuse 242: Software uses US measurements, but the OS
> is in metric...
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