Description:
------------
While doing configure in php-5.2.10 (also happened in PHP 5.3 RC4 and the latest CSV). It works prefectly okay in PHP 5.2.9.

I installed both 32 and 64 version of libmysqlclient.so which located in
/usr/lib/mysql and /usr/lib64/mysql respectively. Sounds like the
configure script seek for only /usr/lib/mysql. Here is the error in
config.log

configure:60459: gcc -o conftest -I/usr/include -g -O2 -pthread 
-D_REENTRANT -Wl,-rpath,/usr/lib/mysql -L/usr/lib/mysql -L/usr/lib 
-Wl,-rpath,/usr/kerberos/lib64 -L/usr/kerberos/lib64 -Wl,-rpath,/usr
-L/usr conftest.c -lmysqlclient_r  -lz -lmcrypt -lltdl -lcrypt -lpam
-lfreetype -lpng -lz -ljpeg -lgdbm -lcurl -lz -lresolv -lm -ldl -lnsl 
-lxml2 -lz -lm -lcurl -lgssapi_krb5 -lkrb5 -lk5crypto -lcom_err -lresolv
-ldl -lidn -lssl -lcrypto -lz -lxml2 -lz -lm -lgssapi_krb5 -lkrb5
-lk5crypto -lcom_err -lssl -lcrypto -ldl -lz 1>&5
/usr/bin/ld: skipping incompatible /usr/lib/mysql/libmysqlclient_r.so
when searching for -lmysqlclient_r
/usr/bin/ld: skipping incompatible /usr/lib/mysql/libmysqlclient_r.a
when searching for -lmysqlclient_r
/usr/bin/ld: cannot find -lmysqlclient_r
collect2: ld returned 1 exit status
configure: failed program was:
#line 60448 "configure"
#include "confdefs.h"
/* Override any gcc2 internal prototype to avoid an error.  */
/* We use char because int might match the return type of a gcc2
    builtin and then its argument prototype would still apply.  */
char mysql_error();

int main() {
mysql_error()
; return 0; }


Reproduce code:
---------------
./configure --with-apxs2=/usr/local/httpd/bin/apxs --with-gd --with-jpeg-dir=/usr --with-png-dir=/usr --with-zlib-dir=/usr --with-freetype-dir=/usr --with-zlib --enable-ftp --enable-sockets --enable-mbstring=all --enable-zip --enable-soap --with-iconv --with-gdbm --with-mcrypt --with-imap --with-kerberos --with-imap-ssl --with-curl --with-mysql

Expected result:
----------------
No error

Actual result:
--------------
checking for mysql_close in -lmysqlclient... no
checking for mysql_error in -lmysqlclient... no
configure: error: mysql configure failed. Please check config.log for more information.