Description:
------------
I compile with rpmbuild -bb php.spec

Version csdk: 2.90 UC3
Apache Version: Apache/2.0.52 (Red Hat)

Compilation from sources is ok, but when apache2 restart, the log shows:

PHP Warning:  Unknown(): Unable to load dynamic library '/usr/lib/php4/informix.so' - /opt/informix/lib/esql/libifos.so: undefined symbol: ifx_checkAPI in Unknown on line 0

I try to compile only the informix module with:

phpize (in ext/informix)
./configure
make

compile ok

and copy informix.so to /usr/lib/php4

Restart apache and same problem

Reproduce code:
---------------
Part of spec file...

INFORMIXDIR=/opt/informix; export INFORMIXDIR
IFX_LIBDIR="-L$INFORMIXDIR/lib -L$INFORMIXDIR/lib/esql"
IFX_INCDIR="$INFORMIXDIR/incl/esql"
IFX_LIBS="$INFORMIXDIR/lib/esql/libifsql.a \
$INFORMIXDIR/lib/libifasf.a \
$INFORMIXDIR/lib/esql/libifgen.a \
$INFORMIXDIR/lib/esql/libifos.a \
$INFORMIXDIR/lib/esql/libifgls.a \
-lgen -lgls -lm -ldl $INFORMIXDIR/lib/esql/checkapi.o \
$INFORMIXDIR/lib/esql/libifglx.a"

export IFX_LIBDIR IFX_INCDIR IFX_LIBS

%configure \
        --cache-file=../config.cache \
        --with-config-file-path=%{_sysconfdir} \
        --with-config-file-scan-dir=%{_sysconfdir}/php.d \
        --enable-force-cgi-redirect \
        --disable-debug \
        --enable-pic \
        --disable-rpath \
        --enable-inline-optimization \
        --with-bz2 \
        --with-db4=%{_prefix} \
        --with-curl \
        --with-exec-dir=%{_bindir} \
        --with-freetype-dir=%{_prefix} \
        --with-png-dir=%{_prefix} \
        --with-gd=shared \
        --enable-gd-native-ttf \
        --without-gdbm \
        --with-gettext \
        --with-ncurses=shared \
        --with-gmp \
        --with-iconv \
        --with-jpeg-dir=%{_prefix} \
        --with-openssl \
        --with-png \
        --with-pspell \
        --with-xml \
        --with-expat-dir=%{_prefix} \
        --with-dom=shared,%{_prefix} \
        --with-dom-xslt=%{_prefix}
        --with-dom-exslt=%{_prefix} \
        --with-xmlrpc=shared \
        --with-zlib \
        --with-zlib \
        --with-layout=GNU \
        --enable-bcmath \
        --enable-exif \
        --enable-ftp \
        --enable-magic-quotes \
        --enable-sockets \
        --enable-sysvsem \
        --enable-sysvshm \
        --enable-track-vars \
        --enable-trans-sid \
        --enable-yp \
        --enable-wddx \
        --with-pear=/usr/share/pear \
        --with-imap=shared --with-imap-ssl \
        --with-kerberos } \
        --with-ldap=shared \
        --with-mysql=shared,%{_prefix} \
--with-oracle=shared,/home/orabd/aplicbd/orabin/product/9.2.0/ \
        --with-informix=shared,/opt/informix \
        --with-pgsql=shared \
        --with-snmp=shared,%{_prefix} \
        --with-snmp=shared \
        --enable-ucd-snmp-hack \
        --with-unixODBC=shared,%{_prefix} \
        --enable-memory-limit \
        --enable-shmop \
        --enable-calendar \
        --enable-dbx \
        --enable-dio \
        --enable-mbstring=shared --enable-mbstr-enc-trans \
        --enable-mbregex \
        --with-mime-magic=%{_datadir}/magic.mime } \
        --with-pic \
        $* || tail -300 config.log

make %{?_smp_mflags}
}

# Build standalone /usr/bin/php
pushd build-cgi
build --enable-force-cgi-redirect
popd

# Build Apache module
pushd build-apache
build --with-apxs2=%{_sbindir}/apxs }
popd


Actual result:
--------------
PHP Warning:  Unknown(): Unable to load dynamic library '/usr/lib/php4/informix.so' - /opt/informix/lib/esql/libifos.so: undefined symbol: ifx_checkAPI in Unknown on line 0