After a successful install of PHP using the configuration:
./configure --with-openlink=/usr/local/openlink \
--with-apache=../apache_1.3.17 --enable-track-vars --with-gd \
--enable-ftp --with-ttf --with-jpeg-dir=/usr/lib --with-mysql=/usr/local \
--with-imap

running:
./configure --prefix=/etc/apache --logfiledir=/var/log/apache \ --activate-module=src/modules/php4/libphp4.a

fails with the message:
cd ..; gcc  -DLINUX=22 -I/usr/src/php-4.0.4pl1 -I/usr/src/php-4.0.4pl1/main -I/usr/src/php-4.0.4pl1/main -I/usr/src/php-4.0.4pl1/Zend -I/usr/src/php-4.0.4pl1/Zend -I/usr/src/php-4.0.4pl1/TSRM -I/usr/src/php-4.0.4pl1/TSRM -I/usr/src/php-4.0.4pl1 -DUSE_EXPAT -I./lib/expat-lite -DNO_DL_NEEDED `./apaci`     -o helpers/dummy helpers/dummy.c   -Wl,-rpath,/usr/lib/lib -Wl,-rpath,/usr/local/lib/mysql  -rdynamic -L/usr/lib/lib -L/usr/local/lib/mysql -Lmodules/php4 -L../modules/php4 -L../../modules/php4 -lmodphp4  -L/usr/local/openlink/odbcsdk/lib -liodbc -lpam -lc-client  -ldl -lmysqlclient -lttf -lz -lpng -lgd -ljpeg -lresolv -lm -ldl -lcrypt -lnsl  -lresolv -L/usr/lib/lib -ljpeg   -lm -lcrypt
/usr/lib/libc-client.so: undefined reference to `mm_expunged'
/usr/lib/libc-client.so: undefined reference to `mm_diskerror'
/usr/lib/libc-client.so: undefined reference to `mm_lsub'
/usr/lib/libc-client.so: undefined reference to `mm_flags'
/usr/lib/libc-client.so: undefined reference to `mm_fatal'
/usr/lib/libc-client.so: undefined reference to `mm_nocritical'
/usr/lib/libc-client.so: undefined reference to `mm_notify'
/usr/lib/libc-client.so: undefined reference to `mm_searched'
/usr/lib/libc-client.so: undefined reference to `mm_status'
/usr/lib/libc-client.so: undefined reference to `mm_login'
/usr/lib/libc-client.so: undefined reference to `mm_list'
/usr/lib/libc-client.so: undefined reference to `mm_critical'
/usr/lib/libc-client.so: undefined reference to `mm_exists'
/usr/lib/libc-client.so: undefined reference to `mm_log'
/usr/lib/libc-client.so: undefined reference to `mm_dlog'
collect2: ld returned 1 exit status
make: *** [dummy] Error 1
Creating Makefile in src
 + configured for Linux platform
 + setting C compiler to gcc
 + setting C pre-processor to gcc -E
 + checking for system header files
 + adding selected modules
    o php4_module uses ConfigStart/End
 + checking sizeof various data types
 + doing sanity check on compiler and options
** A test compilation with your Makefile configuration
** failed.  The below error output from the compilation
** test will give you an idea what is failing. Note that
** Apache requires an ANSI C Compiler, such as gcc. 

======== Error Output for sanity check ========
============= End of Error Report =============

 Aborting!

This error can be duplicated by running:
gcc src/helpers/dummy.c -o dummy -lc-client