Ubuntu amd64 (x86_64)version 7.04 issues with compiling php from source

LDZ420 · 08-18-2007, 07:40 PM

Hi

I am a Linux rookie so here we go.
I am trying to install php 5.2.3 on my ubuntu machine
(yes I do understand that I could easily install ubuntu's packaged version
which is 5.2.1 but I wanted to grow in learning about compiling from source) moreover, while trying to install php am able to ./configure the php source but when trying to use make i get an error

"
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../lib64/libxml2.a(entities.o): relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC
/usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../lib64/libxml2.a: could not read symbols: Bad value
collect2: ld returned 1 exit status
make: *** [libphp5.la] Error 1
"
- gcc version is 4.1.2
- I have apache2 installed
- I used --enable-so when configuring apache
- i have set apxs2= /path/to/apxs
- I have search on different search engines
-I used "sudo ./configure --prefix=/usr/local/web --with-apxs2=/path/to/apxs" to config installation

- I tried using make clean still didn't work
- when using ./configure --prefix=/usr/local/web (no apxs) " to config installation make seems to work fine.

any assistance will be appreciated.
if there is a better place to post this error or necessary information is missing please inform me &

weibullguy · 08-18-2007, 09:21 PM

You're trying to use the statically built libxml archive which isn't PIC-enabled. When GCC is given the -l flag to link to a library (libxml in this case), it falls back to the static archive when it can't find a shared library. Ideally, you would rebuild libxml and enable the shared library (which should be default anyway). At least you need to rebuild the static libxml using the -fPIC flag.

LDZ420 · 08-20-2007, 09:02 PM

Do you have a link that can show me how to rebukd a static library. I have researched and tried and have only failed.

LDZ420 · 08-20-2007, 09:35 PM

Sorry.. I mean.. can you find a link to a site that can show me how to do this?
Forgive me of my ignorance.

weibullguy · 08-20-2007, 11:14 PM

You have to add -fPIC to CFLAGS/CXXFLAGS or pass it to gcc when you build the library. The way I would do it (although libxml2 should build PIC-enable by default) on my x86_64 machine

Code:

CC="gcc ${BUILD64} -fPIC" ./configure --prefix=/usr --libdir=/usr/lib64 &&
make &&
su -c 'make install'

Where ${BUILD64} is a list of the build options I use for everything.

LDZ420 · 08-23-2007, 08:24 AM

Hey,

so it seems that you were completely correct. The reason for my problem seems to be that i had a broken symbolic link to libxml2.so in my /usr/lib64 There was a file named libxml2.so.2 which seemed to be pointing to a latter version of libxml2.so. I had assumed that php was recognizing this file as my libxml2.so.. I thought that possibly renaming this link would fix it but I though couldn't be.. well i finally decided to go against my own expectations and well it worked( yes yes I am a newbie).

And no matter how ridiculous I feel about how long it took me to solve this issue. I am amazed at all of the other things that I learned while researching this issue. That I would have never spent my time learning. weibullguy.. I thank you for helping this community to work for people like me.