error when installing da on centos5.2 32bit

[joechan81hk]

OS: CentOS 5.2 32Bit
installed gcc & gcc-c++

error when installing the directadmin

Cannot find /usr/local/bin/php
Please recompile php with custombuild, eg:
cd /usr/local/directadmin/custombuild
./build all d

after i try to build the php again, i got the below error

mkdir .libs
chmod 777 .libs
gcc -I. -I. -I../include -I./../include -I.. -I./.. -g -O2 -fvisibility=hidden -DLIBDIR=\"/usr/local/lib\" -DBUILDING_LIBICONV -DBUILDING_DLL -DENABLE_RELOCATABLE=1 -DIN_LIBRARY -DINSTALLDIR=\"/usr/local/lib\" -DNO_XMALLOC -Dset_relocation_prefix=libiconv_set_relocation_prefix -Drelocate=libiconv_relocate -DHAVE_CONFIG_H -fPIC -DPIC -DLIBICONV_PLUG ./iconv.c ./../libcharset/lib/localcharset.c ./relocatable.c -shared -o preloadable_libiconv_linux.so
./iso8859_4.h: In function 'iso8859_4_mbtowc':
./iso8859_4.h:55: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://bugzilla.redhat.com/bugzilla> for instructions.
The bug is not reproducible, so it is likely a hardware or OS problem.
make[1]: *** [preloadable_libiconv_linux.so] Error 1
make[1]: Leaving directory `/usr/local/directadmin/custombuild/libiconv-1.12/lib'
make: *** [all] Error 2

i have try to ./build update first, but still got the same error, please help