Making all in perl
/bin/sh ../../libtool --mode=compile gcc -DHAVE_CONFIG_H -I. -I. -I../.. -I../../src    -I../../src/core        -I../../src/fe-common/core         -I/opt/local/include/glib-2.0 -I/opt/local/lib/glib-2.0/include -I/opt/local/include       -DSCRIPTDIR=\""/usr/local/share/irssi/scripts"\"        -DPERL_USE_LIB=\"""\"   -DPERL_STATIC_LIBS=1    -g -pipe -fno-common -DPERL_DARWIN -no-cpp-precomp -fno-strict-aliasing -I/usr/local/include -I/System/Library/Perl/5.8.6/darwin-thread-multi-2level/CORE    -g -O2 -Wall -I/opt/local/include   -c perl-core.c
mkdir .libs
 gcc -DHAVE_CONFIG_H -I. -I. -I../.. -I../../src -I../../src/core -I../../src/fe-common/core -I/opt/local/include/glib-2.0 -I/opt/local/lib/glib-2.0/include -I/opt/local/include -DSCRIPTDIR=\"/usr/local/share/irssi/scripts\" -DPERL_USE_LIB=\"\" -DPERL_STATIC_LIBS=1 -g -pipe -fno-common -DPERL_DARWIN -no-cpp-precomp -fno-strict-aliasing -I/usr/local/include -I/System/Library/Perl/5.8.6/darwin-thread-multi-2level/CORE -g -O2 -Wall -I/opt/local/include -c perl-core.c  -fno-common -DPIC -o .libs/perl-core.o
In file included from module.h:19,
                 from perl-core.c:22:
../../src/common.h:66:4: error: #error uoff_t size not set
In file included from perl-core.c:26:
../../src/core/misc.h:79: error: parse error before 'str_to_uofft'
../../src/core/misc.h:79: warning: type defaults to 'int' in declaration of 'str_to_uofft'
../../src/core/misc.h:79: warning: data definition has no type or storage class
In file included from perl-core.c:31:
perl-common.h:31:1: warning: "PL_sv_undef" redefined
In file included from /System/Library/Perl/5.8.6/darwin-thread-multi-2level/CORE/perl.h:3565,
                 from module.h:6,
                 from perl-core.c:22:
/System/Library/Perl/5.8.6/darwin-thread-multi-2level/CORE/embedvar.h:753:1: warning: this is the location of the previous definition
In file included from perl-core.c:31:
perl-common.h:32: error: parse error before '->' token
perl-core.c:40:1: warning: "PL_perl_destruct_level" redefined
In file included from /System/Library/Perl/5.8.6/darwin-thread-multi-2level/CORE/XSUB.h:320,
                 from perl-core.c:35:
/System/Library/Perl/5.8.6/darwin-thread-multi-2level/CORE/perlapi.h:476:1: warning: this is the location of the previous definition
perl-core.c: In function 'boot_Irssi_Core':
perl-core.c:96: warning: passing argument 1 of 'irssi_callXS' from incompatible pointer type
perl-core.c:94: warning: unused variable 'items'
make[3]: *** [perl-core.lo] Error 1
make[2]: *** [all-recursive] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all-recursive-am] Error 2