Hi All,
How can I get a definitive answer as to whether mod_perl was compiled with Large File Support?
I have a shell login account but not root.
It's complicated. Because Apache and Perl need to be compiled with LFS to really "have" it under mod_perl. Many times you get Perl compiled with LFS but not Apache, or the other way around. Depending on what you do it could be enough to have Perl compiled with LFS. e.g. if you call a perl function which doesn't interact with Apache guts it'll work just fine. If perl needs to interact with Apache (e.g. passing some non-zero offset to an Apache API) there is a problem. If your Apache log file grows beyong 2G and have Apache with LFS, but not Perl you are fine too, since Apache will do the right thing.
It's easy to check perl:
% perl -V | grep USE_LARGE_FILES
Compile-time options: MULTIPLICITY USE_ITHREADS USE_LARGE_FILES PERL_IMPLICIT_CONTEXT
It's harder with Apache, since you need to grep its include files (which may be unavailable). I don't know which Apache you are using, each version has it in a different way:
2) for Apache2 it's an APR issue, so you do:
% grep APR_HAS_LARGE_FILES /home/stas/httpd/prefork/include/apr.h #define APR_HAS_LARGE_FILES 0
As you can see on linux APR builds with no LFS, which sucks. And this is a hardcoded setting, you can't change it via config options. Here is the explanation of that reasoning:
http://marc.theaimsgroup.com/?l=apr-dev&m=105277560530754&w=2
1) Apache 1.3 has a different define in include/ap_config_auto.h: #define _LARGEFILE_SOURCE 1
which gets defined if you pass -D_LARGEFILE_SOURCE, when building Apache.
If you have a dynamic build you could also use apxs:
/home/stas/httpd/1.3-dynamic/bin/apxs -q cflags
-DLINUX=22 -I/usr/include/db1 -DMOD_PERL -DUSE_HSREGEX -D_REENTRANT -DTHREADS_HAVE_PIDS -DDEBUGGING -fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm -g -DPERL_DESTRUCT_LEVEL=2/home/stas
As you can see -D_LARGEFILE_SOURCE is on __________________________________________________________________ Stas Bekman JAm_pH ------> Just Another mod_perl Hacker http://stason.org/ mod_perl Guide ---> http://perl.apache.org mailto:[EMAIL PROTECTED] http://use.perl.org http://apacheweek.com http://modperlbook.org http://apache.org http://ticketmaster.com
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