Hello. I've searched the internet and found many things relating to this,
but I thought I would present my own specific problem. I'm trying to
install mod_perl with IBM HTTP Server (which is really just apache 1.3.12)
on AIX 4.3.3.
Everything installs fine, but when I tried to use Net::LDAP, apache
segfaults. When I analyze the core file, I'm told that boot_IO is where
the problem occurred. Has anyone conquered this problem? The mod_perl
readme says that if you are installing on AIX with perl 5.00503 you have
to apply a patch to prevent segfaulting when an XS module is called. I
applied it and re-compiled.
I also tried using perl 5.6.1, which yielded the same results. I've traced
it down to the 'use IO::Handle;' clause. I'm using the VisualAge C (vac)
compiler to compile everything (gcc hasn't worked very well for most
things on this platform.)
All things in this message that don't work in mod_perl work fine if
they're not run from apache under mod_perl.
The following details the method to my madness:
# lslpp -l |grep vac
vac.msg.en_US.C 5.0.1.0 COMMITTED C for AIX Compiler
vacpp.cmp.rte 4.0.2.0 COMMITTED VisualAge C++ Compiler
vac.C 5.0.1.0 COMMITTED C for AIX Compiler
# lslpp -l |grep xlC
xlC.aix43.rte 4.0.2.2 APPLIED C Set ++ Runtime for AIX
xlC.cpp 4.3.0.1 COMMITTED C for AIX Preprocessor
xlC.msg.en_US.cpp 4.3.0.1 COMMITTED C for AIX Preprocessor
xlC.msg.en_US.rte 4.0.2.0 COMMITTED C Set ++ Runtime
xlC.rte 4.0.2.0 COMMITTED C Set ++ Runtime
<installed the mod_perl patch on perl_5.00503/ext/DynaLoader/dl_aix.xs>
# cd /usr/build/perl_5.00503
# ./Configure -de
# make
# make install
# perl -MCPAN -e shell;
(answer configuration questions...)
cpan> install HTML::HeadParser
cpan> install LWP::UserAgent
# cd /usr/build/mod_perl-1.25
# perl Makefile.PL USE_APXS=1 WITH_APXS=/usr/HTTPServer/bin/apxs \
EVERYTHING=1
# make
# make install
# cd /usr/HTTPServer/bin
# ./apachectl configtest
Syntax OK
At this point, lots of perl scripts will run fine under mod_perl, until
one of them calls 'use IO::Handle;' ... then:
# ./apachectl configtest
./apachectl[145]: 19372 Segmentation fault(coredump)
Now I analyze the core file to find out what is causing the dump..
surprise!
# dbx /usr/HTTPServer/bin/httpd core
Type 'help' for help.
reading symbolic information ...warning: no source compiled with -g
[using memory image in core]
Segmentation fault in boot_IO at 0xd178d39c ($t1)
0xd178d39c (boot_IO+0xc) 80830000 lwz r4,0x0(r3)
----------------------------------------------------
Thinking it might be IBM HTTP Server implementation, I built apache from
source with the following method (I did this with Apache 1.3.12 and Apache
1.3.20):
# cd /usr/build/apache_1.3.12
# ./configure --enable-module=so \
--enable-module=proxy \
--enable-shared=proxy \
--prefix=/usr/local/apache
# make
# make install
Then I repeated the mod_perl installation. Same darn segfault.
Does anyone have any insight into this? It's becoming a very painful
battle.
If you're curious, here's my output from perl -V:
Summary of my perl5 (5.0 patchlevel 5 subversion 3) configuration:
Platform:
osname=aix, osvers=4.3.3.0, archname=aix
uname='aix proxysvr 3 4 0025507c4c00 '
hint=recommended, useposix=true, d_sigaction=define
usethreads=undef useperlio=undef d_sfio=undef
Compiler:
cc='cc', optimize='-O', gccversion=
cppflags='-D_ALL_SOURCE -D_ANSI_C_SOURCE -D_POSIX_SOURCE -qmaxmem=8192
-I/usr/local/include'
ccflags ='-D_ALL_SOURCE -D_ANSI_C_SOURCE -D_POSIX_SOURCE -qmaxmem=8192
-I/usr/local/include'
stdchar='unsigned char', d_stdstdio=define, usevfork=false
intsize=4, longsize=4, ptrsize=4, doublesize=8
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=8
alignbytes=8, usemymalloc=n, prototype=define
Linker and Libraries:
ld='ld', ldflags =' -L/usr/local/lib'
libpth=/usr/local/lib /lib /usr/lib /usr/ccs/lib
libs=-lnsl -lgdbm -ldbm -ldl -lld -lm -lc -lcrypt -lbsd -lPW
libc=, so=a, useshrplib=false, libperl=libperl.a
Dynamic Linking:
dlsrc=dl_aix.xs, dlext=so, d_dlsymun=undef, ccdlflags='-bE:perl.exp'
cccdlflags=' ', lddlflags='-bhalt:4 -bM:SRE -bI:$(PERL_INC)/perl.exp
-bE:$(BASEEXT).exp -b noentry -lc -L/usr/local/
lib'
Characteristics of this binary (from libperl):
Built under aix
Compiled at Jul 8 2001 23:40:44
@INC:
/usr/local/lib/perl5/5.00503/aix
/usr/local/lib/perl5/5.00503
/usr/local/lib/perl5/site_perl/5.005/aix
/usr/local/lib/perl5/site_perl/5.005
Thanks for your time,
Matt
