Hi, Thought ( or hoped ) this might be useful to any folk building on the HPUX 11 platform : Attempting to do this build causes Apache configure to fail with undefined symbols at sanity compile. This may be specific to the version of Oracle ( 8.1.6 ) that I used, as it seems to have several apparently vital object files not installed into libraries, just "lying around" there... In addition the mod_perl configure process writes -Aa -D_HPUX_SOURCE into various cflags . This causes the Apache make process to fail complaining about -Aa -D_HPUX_SOURCE +e or -Ae being required ( something about long integers ) By being a bit brutal with the Apache src/Configure script and then running a ( small ) sed script on all Makefiles I managed to get it to build just fine - but it took a while to work out what was going on... ( not being a "configure" or perl build expert ) Details are as follows : All builds were done using HP's ANSI C compiler Perl 5005_03 Build -------------- I installed perl + DBI-1.13 + DBD-Oracle-1.06. this required a STATIC build for DBD-Oracle the version of Oracle is 8.1.6 the os is HPUX 11 ( 32-bit ) mod_perl 1.24 build --------------------- 1 perl Makefile.PL APACHE_SRC=<apache src> DO_HTTPD=1 USE_APACI=1 PREP_HTTPD=1 EVERYTHING=1 2 make 3 make install Apache 1.3.12 build ------------------- 1 ./configure --prefix=<prefix> --activate-module=src/modules/perl/libperl.a this fails with many undefined symbols , this was due to "perl -MExtUtils::Embed -e ldotps" ( run by Configure ) removing the following object files from the library string : <oracle_home>/lib/nautab.o <oracle_home>/lib/naeet.o <oracle_home>/lib/naect.o <oracle_home>/lib/naedhs.o <oracle_home>/rdbms/lib/kpudfo.o 2 cp src/Makefile.config to src/Makefile.config.new 3 edit the .new adding in the libraries to LIBS1 that "perl -MExtUtils::Embed -e ldotps" ( in mod_perl.config.sh ) removes - see 1 4 edit src/Configure getting it to cp Makefile.config.new over Makefile.config just before the sanity compile 5 run configure again 6 run a sed script on each Makefile in the apache tree to change -Aa to -Ae ( sed 's/-Aa/-Ae/g' file1 > file2 ) 7 run make 8 run make install 9 edit prefix/conf/httpd.conf to enable the mod perl bits 10 edit prefix/conf/httpd.conf to know about ORACLE_HOME ( SenEnv ORACLE_HOME <oracle home> ) Cheers Mark P.s : I know people are going to say " Use GCC and it will be ok".... I did try this on a ( different ) HPUX 11 box and still Oracle-DBD would not run if built dynamically - it built ok but the loader refused to load Oracle.sl, something about threaded library... ! no such issue arises on HPUX 10.20 and Oracle 8.0.5...)