Gcc compiler on oul

Question

I am trying to run a script as a patch to the install Oracle 9i on UL. First it fails with libjava.so not found. Then I tried to apply patch 3423540 as suggested by Oracle. Here is the actual script that should run. Needs the gcc compiler - so installed that from ul distribution. And now while running the patch it cant find standard include directories like errno.h and syscall.h . Any help will be appreciated
#!/bin/bash
USER=`whoami`
if [ $USER != root ]; then
echo "Must be root to run this script, please login as root and re-try"
exit
fi
# see if libcwait.so is already being loaded
if [ -f "/etc/ld.so.preload" ] && [ -n "`grep libcwait /etc/ld.so.preload`" ]; then
echo "Patch has already been applied"
exit
else
echo "Applying patch..."
fi
cat << EOF |
#include <errno.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
pid_t
__libc_wait (int *status)
int res;
asm volatile ("pushl %%ebx\n\t"
"movl %2, %%ebx\n\t"
"movl %1, %%eax\n\t"
"int \$0x80\n\t"
"popl %%ebx"
: "=a" (res)
: "i" (__NR_wait4), "0" (WAIT_ANY), "c" (status), "d" (0), "S" (0));
return res;
EOF
gcc -O2 -shared -fpic -xc - -o /etc/libcwait.so
# Check we built libcwait.so
if [ -f "/etc/libcwait.so" ]; then
echo "/etc/libcwait.so" >>/etc/ld.so.preload
echo "Ensuring permissions are correctly set..."
chown root.root /etc/libcwait.so /etc/ld.so.preload
chmod 755 /etc/libcwait.so
chmod 444 /etc/ld.so.preload
echo "Done."
echo "Patch successfully applied"
else
echo "Patch installation failed, Please fix errors and try again."
fi

Answer 1

errno.h and syscall.h are provided by glibc-headers package. So check whether this package is installed on your system.
I'm not sure what UL means?
dou you mean United Linux or Unbreakable Linux (aka Enteprise Linux)?
If you mean Unbreakable Linux then you can check this installation paper: http://ivan.kartik.sk/oracle/install_ora9_elinux.html