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Bug #50695 PHP uses system XML2 when custom xml2 is given
Submitted: 2010-01-08 18:07 UTC Modified: 2010-01-09 18:45 UTC
From: quanah at zimbra dot com Assigned:
Status: Closed Package: Compile Failure
PHP Version: 5.2.12 OS: Linux
Private report: No CVE-ID: None
View Developer Edit
 [2010-01-08 18:07 UTC] quanah at zimbra dot com 
Description:
------------
I build PHP against my own build of libxml2.  However, starting with PHP 5.2.12, it now links against the system xml2 in addition to my xml2, causing symbol failures:

# Libraries that this one depends upon.
dependency_libs=' -lcrypt -lcrypt -lrt -lrt -lm -lz -lm -lz -lm -lz -lm -lcrypt -lz -lm -lz -lm -lz -lm -lcrypt -L/usr/lib -L/opt/zimbra/libxml2-2.6.32.1/lib -L/opt/zimbra/aspell-0.60.6/lib -lcrypt -lcrypt /opt/zimbra/aspell-0.60.6/lib/libpspell.la /opt/zimbra/aspell-0.60.6/lib/libaspell.la -lrt -lrt -lresolv -lm -ldl -lnsl -lz -lm -lz -lm -lz -lm -lcrypt -lz -lm -lz -lm /usr/lib/libxml2.la -lpthread -lz -lm -lz -lm -lcrypt'

[build@build01 .libs]$ ldd libphp5.so
<snip>
        libxml2.so.2 => /usr/lib/libxml2.so.2 (0x00157000)
</snip>

Note my libxml2 is a static library.

Reproduce code:
---------------
Configure against a custom libxml2 build:

./configure --with-libxml-dir=/opt/zimbra/libxml2-2.6.32.1

Expected result:
----------------
Only my libxml2 is used

Actual result:
--------------
System xml2 is linked in

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 [2010-01-08 18:13 UTC] quanah at zimbra dot com 
I'm only seeing this on 32-bit linux systems, and I see why.  For some reason, a very bad decision was made to force linking against /usr/lib:

configure:2846: gcc -o conftest -g -O2   conftest.c -R /usr/lib  1>&5
/usr/lib: file not recognized: Is a directory
configure:2879: gcc -o conftest -g -O2   conftest.c -Wl,-rpath,/usr/lib  1>&5
configure:46629: gcc -o conftest -I/usr/include -g -O2  -L/usr/lib  -Wl,-rpath,/opt/zimbra/libxml2-2.6.32.1/lib -L/opt/zimbra/libxml2-2.6.32.1/lib conftest.c -lrt -lresolv -lm -ldl -lnsl  -
lxml2 -lz -lm -lxml2 -lz -lm 1>&5
configure:46901: gcc -o conftest -I/usr/include -g -O2  -L/usr/lib  -Wl,-rpath,/opt/zimbra/libxml2-2.6.32.1/lib -L/opt/zimbra/libxml2-2.6.32.1/lib conftest.c -lrt -lresolv -lm -ldl -lnsl  -
lxml2 -lz -lm -lxml2 -lz -lm 1>&5


Which of course overrides custom locations.  SEe how -L/usr/lib is used all over the place.  The reason I don't see it as an issue on 64 bit RHEL systems is because the libs are in /usr/lib64.
 [2010-01-08 18:17 UTC] quanah at zimbra dot com 
As seen here:

s%@EXTRA_LDFLAGS@% -avoid-version -module -L/usr/lib <....>
 [2010-01-09 18:45 UTC] jani@php.net 
Please try using this snapshot:

  http://snaps.php.net/php5.2-latest.tar.gz
 
For Windows:

  http://windows.php.net/snapshots/

It's already fixed for next release.
 
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