Description:
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Here is the exact error when I start Apache:

% etc/init.d/apache start
httpd starting.
Syntax error on line 233 of /opt/httpd/conf/httpd.conf:
Cannot load /opt/httpd/modules/libphp5.so into server: ld.so.1: httpd: fatal: libmtmalloc.so.1: DF_1_NOOPEN tagged object may not be dlopen()'ed

Here is command I used to configure PHP:

./configure  --with-mysql=/usr/local/mysql --with-apxs2=/opt/httpd/bin/apxs --with-config-file-path=/etc --with-mysqli=/usr
/local/mysql/bin/mysql_config --enable-mbstring --enable-libxml --with-zlib-dir=/usr/local/lib --with-zip --with-gd --with-
jpeg-dir=/usr/local/lib --with-png-dir=/usr/local/lib --with-xpm-dir=/usr/local/lib --with-freetype-dir=/usr/local/lib

Apache version is 2.0.55. Here is Apache configure command:

$ ./configure --disable-ipv6 --enable-so --prefix=/opt/httpd

I used gcc-3.3.2 from Sunfreeware.com to build everything.