Dennis, You are absolutely correct, I hadn't gotten the latest trunk. It worked just as you suggested and here is the outcome: [root@jnispc gearmanxs]# export GEARMAN_INCLUDE=/usr/local/include/ [root@jnispc gearmanxs]# export GEARMAN_LIB=/usr/local/lib/ [root@jnispc gearmanxs]# perl Makefile.PL Using GEARMAN_LIB = /usr/local/lib/ Using GEARMAN_INCLUDE = /usr/local/include/ Checking if your kit is complete... Looks good Writing Makefile for Gearman::XS [root@jnispc gearmanxs]# make cp lib/Gearman/XS.pm blib/lib/Gearman/XS.pm cp lib/Gearman/XS/Client.pm blib/lib/Gearman/XS/Client.pm cp lib/Gearman/XS/Job.pm blib/lib/Gearman/XS/Job.pm cp lib/Gearman/XS/Worker.pm blib/lib/Gearman/XS/Worker.pm cp lib/Gearman/XS/Task.pm blib/lib/Gearman/XS/Task.pm /usr/bin/perl /usr/lib/perl5/5.10.0/ExtUtils/xsubpp -typemap /usr/lib/perl5/5.10.0/ExtUtils/typemap -typemap typemap XS.xs > XS.xsc && mv XS.xsc XS.c gcc -c -I. -I/usr/local/include/ -D_REENTRANT -D_GNU_SOURCE -DPERL_USE_SAFE_PUTENV -DDEBUGGING -fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -DVERSION=\"0.4\" -DXS_VERSION=\"0.4\" -fPIC "-I/usr/lib64/perl5/5.10.0/x86_64-linux-thread-multi/CORE" XS.c XS.xs: In function ‘_perl_worker_function_callback’: XS.xs:122: warning: value computed is not used Running Mkbootstrap for Gearman::XS () chmod 644 XS.bs rm -f blib/arch/auto/Gearman/XS/XS.so LD_RUN_PATH="/usr/local/lib" gcc -shared -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic XS.o -o blib/arch/auto/Gearman/XS/XS.so \ -L/usr/local/lib/ -lgearman \ chmod 755 blib/arch/auto/Gearman/XS/XS.so cp XS.bs blib/arch/auto/Gearman/XS/XS.bs chmod 644 blib/arch/auto/Gearman/XS/XS.bs Manifying blib/man3/Gearman::XS::Client.3pm Manifying blib/man3/Gearman::XS.3pm Manifying blib/man3/Gearman::XS::Job.3pm Manifying blib/man3/Gearman::XS::Worker.3pm Manifying blib/man3/Gearman::XS::Task.3pm [root@jnispc gearmanxs]# make test PERL_DL_NONLAZY=1 /usr/bin/perl "-MExtUtils::Command::MM" "-e" "test_harness(0, 'blib/lib', 'blib/arch')" t/*.t t/00-use.t .......... 1/5 # Testing Gearman::XS 0.4 t/00-use.t .......... ok t/02-pod.t .......... ok t/03-basic.t ........ ok t/04-live.t ......... ok t/05-live-worker.t .. ok t/99-perlcritic.t ... skipped: Author test. Set $ENV{TEST_AUTHOR} to a true value to run. All tests successful. Files=6, Tests=184, 1 wallclock secs ( 0.06 usr 0.01 sys + 0.25 cusr 0.05 csys = 0.37 CPU) Result: PASS [root@jnispc gearmanxs]# make install Files found in blib/arch: installing files in blib/lib into architecture dependent library tree Installing /usr/local/lib64/perl5/site_perl/5.10.0/x86_64-linux-thread-multi/auto/Gearman/XS/XS.so Installing /usr/local/lib64/perl5/site_perl/5.10.0/x86_64-linux-thread-multi/Gearman/XS.pm Installing /usr/local/lib64/perl5/site_perl/5.10.0/x86_64-linux-thread-multi/Gearman/XS/Task.pm Installing /usr/local/lib64/perl5/site_perl/5.10.0/x86_64-linux-thread-multi/Gearman/XS/Job.pm Installing /usr/local/lib64/perl5/site_perl/5.10.0/x86_64-linux-thread-multi/Gearman/XS/Worker.pm Installing /usr/local/lib64/perl5/site_perl/5.10.0/x86_64-linux-thread-multi/Gearman/XS/Client.pm Installing /usr/local/share/man/man3/Gearman::XS::Worker.3pm Installing /usr/local/share/man/man3/Gearman::XS.3pm Installing /usr/local/share/man/man3/Gearman::XS::Job.3pm Installing /usr/local/share/man/man3/Gearman::XS::Task.3pm Installing /usr/local/share/man/man3/Gearman::XS::Client.3pm Appending installation info to /usr/lib64/perl5/5.10.0/x86_64-linux-thread-multi/perllocal.pod 2009/8/7 Dennis Schön