unable to fix this problem

Solaris 9 on an E450 system I've tried everything with gmp including the suggested -mv8plus option during compilation, and still get this error contents of debug.log - CONFIGURE: './configure' '--with-mysql' '--with-gd' '--with-gdbm' '--with-ftp' '--with-zlib' '--with-gmp' '--with-apxs=/usr/local/apache/bin/apxs'

CC:         gcc
CFLAGS:     -g -O2
CPPFLAGS:    -D_POSIX_PTHREAD_SEMANTICS

CXX: CXXFLAGS:

INCLUDES:    -I$(top_builddir)/Zend -I/usr/local/include
LDFLAGS:     -R/usr/ucblib -L/usr/ucblib -R/usr/local/lib/gcc-lib/sparc-sun-solaris2.9/3.2.3 -L/usr/local/lib/gcc-lib/sparc-sun-solaris2.9/3.2.3 -R/usr/local/lib -L/usr/local/lib
LIBS:       -lgmp -lpng -lz -lgdbm -lz -lresolv -lm -ldl -lnsl -lsocket  -lgcc

DLIBS:

SAPI:       apache
PHP_RPATHS:  /usr/ucblib /usr/local/lib/gcc-lib/sparc-sun-solaris2.9/3.2.3 /usr/local/lib

uname -a: SunOS ns5 5.9 Generic sun4u sparc SUNW,Ultra-4 Solaris gcc -o conftest -g -O2 -D_POSIX_PTHREAD_SEMANTICS -R/usr/ucblib -L/usr/ucblib -R/usr/local/lib/gcc-lib/sparc-sun-solaris2.9/3.2.3 -L/usr/local/lib/gcc-lib/sparc-sun-solaris2.9/3.2.3 -R/usr/local/lib -L/usr/local/lib conftest.c -lgmp -lpng -lz -lgdbm -lz -lresolv -lm -ldl -lnsl -lsocket -lgcc 1>&5 ld: fatal: file /usr/local/lib/libgmp.so: wrong ELF class: ELFCLASS64 ld: fatal: File processing errors. No output written to conftest collect2: ld returned 1 exit status