Hello!
I want tu reuse existing c code from different c files. I neither have
them as a real library, nor would I like to copy+paste them into my Perl
module (after the __C__ tag). The reason for that is, that the original c
code comes from an open source project of a standalone program (gnubg). I
just don't want to reinvent the wheel and still be flexible enough for
oncoming future versions of the program.
Is there a trick or a common known problem how to use normal c files via
#include "file.h"
with Inlince::C.
I only found examples where some libraries like ncurses, gtk or similar
were used. That was solved with the LIB => -L .... option, but that seems
different to including "simple" c files (sorry if it's the wrong
expression, I'm not a good c programmer).
Here's a voluminous description of what I've tried. I started the module
with the normal stuff and the use Inline part:
use Inline C => 'DATA',
NAME => 'Games::Backgammon',
VERSION => '0.03';
and after the Perl lines the C part comes:
__DATA__
__C__
#include <errno.h>
#include "positionid.h"
int _CheckPosition(AV* a) {
int i, j;
int anBoard[ 2 ][ 25 ];
for (i = 0; i < 2; i++) {
for (j = 0; j < 25; j++) {
SV** sv = av_fetch(a,25*i + j,0);
anBoard[ i ][ j ] = SvIV(*sv);
}
}
return CheckPosition(anBoard) == 0;
}
}
As you can see, it's only a simple (O.K. ineffective, but that's not my
problem) wrapper that delegates to the CheckPosition method from
positionid.[cho].
I first copied the position.* files to the same directory where also the
Perl module is. That resulted in a problem with make (allthough in
Makefile.PL the module had been changed to Inline::MakeMaker), as it now
tried to find Backgammon.o ?!
cp Backgammon.pm blib/lib/Games/Backgammon.pm Running Mkbootstrap for
Games::Backgammon () chmod 644 Backgammon.bs
rm -f blib/arch/auto/Games/Backgammon/Backgammon.so LD_RUN_PATH="" cc
-shared -L/usr/local/lib Backgammon.o -o
blib/arch/auto/Games/Backgammon/Backgammon.so cc: Backgammon.o: Datei oder
Verzeichnis nicht gefunden cc: no input files
make: *** [blib/arch/auto/Games/Backgammon/Backgammon.so] Fehler 1
When I deleted these files (known that now of course it would be
impossible to find a position.h or even the .c or .o file), at least make
called the Inline module.
Starting Build Prepocess Stage
Finished Build Prepocess Stage
[snipped some uninteresting stuff]
cc1: warning: changing search order for system directory
"/usr/local/include" cc1: warning: as it has already been specified as a
non-system directory Backgammon.xs:7:24: positionid.h: Datei oder
Verzeichnis nicht gefunden make[1]: *** [Backgammon.o] Fehler 1
make[1]: Verlassen des Verzeichnisses Verzeichnis
»/home/janek/projects/Games-Backgammon/_Inline/build/Games/Backgammon«
[...]
As expected, it also didn't worked.
Now i created a subdirectory 'gnubg' where the positionid.* files are in.
I also changed a parameter of use Inlines, that it can find gnubg:
use Inline C => 'DATA',
INC => '-I../../../../gnubg',
NAME => 'Games::Backgammon',
VERSION => '0.03';
The result was now, that make run without serious errors:
[snipped ...]
Starting "make" Stage
make[1]: Wechsel in das Verzeichnis Verzeichnis
»/home/janek/projects/Games-Backgammon/_Inline/build/Games/Backgammon«
/usr/bin/perl /usr/lib/perl5/5.8.0/ExtUtils/xsubpp -typemap
/usr/lib/perl5/5.8.0/ExtUtils/typemap Backgammon.xs > Backgammon.xsc &&
mv Backgammon.xsc Backgammon.c cc -c
-I/home/janek/projects/Games-Backgammon -I../../../../gnubg -D_REENTRANT
-D_GNU_SOURCE -fno-strict-aliasing -I/usr/local/include
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm -O2
-DVERSION=\"0.03\" -DXS_VERSION=\"0.03\" -fpic
"-I/usr/lib/perl5/5.8.0/i686-linux-thread-multi/CORE" Backgammon.c cc1:
warning: changing search order for system directory "/usr/local/include"
cc1: warning: as it has already been specified as a non-system directory
Running Mkbootstrap for Games::Backgammon () chmod 644 Backgammon.bs
rm -f blib/arch/auto/Games/Backgammon/Backgammon.so LD_RUN_PATH="" cc
-shared -L/usr/local/lib Backgammon.o -o
blib/arch/auto/Games/Backgammon/Backgammon.so chmod 755
blib/arch/auto/Games/Backgammon/Backgammon.so cp Backgammon.bs
blib/arch/auto/Games/Backgammon/Backgammon.bs chmod 644
blib/arch/auto/Games/Backgammon/Backgammon.bs make[1]: Verlassen des
Verzeichnisses Verzeichnis
»/home/janek/projects/Games-Backgammon/_Inline/build/Games/Backgammon«
Finished "make" Stage
Starting "make install" Stage
make[1]: Wechsel in das Verzeichnis Verzeichnis
»/home/janek/projects/Games-Backgammon/_Inline/build/Games/Backgammon«
Installing
/home/janek/projects/Games-Backgammon/blib/arch/auto/Games/Backgammon/Backgammon.so
Installing
/home/janek/projects/Games-Backgammon/blib/arch/auto/Games/Backgammon/Backgammon.bs
Files found in blib/arch: installing files in blib/lib into architecture
dependent library tree Writing
/home/janek/projects/Games-Backgammon/blib/arch/auto/Games/Backgammon/.packlist
make[1]: Verlassen des Verzeichnisses Verzeichnis
»/home/janek/projects/Games-Backgammon/_Inline/build/Games/Backgammon«
Finished "make install" Stage
Starting Cleaning Up Stage
Finished Cleaning Up Stage
Finished Build Compile Stage
Manifying blib/man3/Games::Backgammon.3
So far, so well.
But now I tried to run my testscript with make test and could see that it
didn't run:
PERL_DL_NONLAZY=1 /usr/bin/perl "-MExtUtils::Command::MM" "-e"
"test_harness(0, 'blib/lib', 'blib/arch')" t/*.t t/1...............Had
problems bootstrapping Inline module 'Games::Backgammon'
Can't load
'/home/janek/projects/Games-Backgammon/blib/arch/auto/Games/Backgammon/Backgammon.so'
for module Games::Backgammon:
/home/janek/projects/Games-Backgammon/blib/arch/auto/Games/Backgammon/Backgammon.so:
undefined symbol: CheckPosition at
/usr/lib/perl5/5.8.0/i686-linux-thread-multi/DynaLoader.pm line 237,
<DATA> line 1.
at /usr/lib/perl5/site_perl/5.8.0/Inline.pm line 500
at t/1.t line 0
INIT failed--call queue aborted, <DATA> line 1. t/1...............dubious
Test returned status 255 (wstat 65280, 0xff00)
DIED. FAILED test 1
Failed 1/1 tests, 0.00% okay
t/set_position....Had problems bootstrapping Inline module
'Games::Backgammon'
Can't load
'/home/janek/projects/Games-Backgammon/blib/arch/auto/Games/Backgammon/Backgammon.so'
for module Games::Backgammon:
/home/janek/projects/Games-Backgammon/blib/arch/auto/Games/Backgammon/Backgammon.so:
undefined symbol: CheckPosition at
/usr/lib/perl5/5.8.0/i686-linux-thread-multi/DynaLoader.pm line 237,
<DATA> line 1.
at /usr/lib/perl5/site_perl/5.8.0/Inline.pm line 500
at t/set_position.t line 0
INIT failed--call queue aborted, <DATA> line 1. # No tests run!
t/set_position....dubious
Test returned status 255 (wstat 65280, 0xff00)
DIED. FAILED tests 1-183
Failed 183/183 tests, 0.00% okay
Failed Test Stat Wstat Total Fail Failed List of Failed
-------------------------------------------------------------------------------
t/1.t 255 65280 1 1 100.00% 1 t/set_position.t 255
65280 183 183 100.00% 1-183 Failed 2/2 test scripts, 0.00% okay.
184/184 subtests failed, 0.00% okay. make: *** [test_dynamic] Fehler 2
I also tried to link it static, to copy the positionid.* files to other
places, but it didn't help.
Of course, I can do it with the classical XS style, but I would really
prefer to use the nice Inline style!
Thanks in advance,
Janek
