When trying to configure the Digi Real Port daemon (a virtual serial port, or RS-232 over IP) on a Red Hat machine (RHEL Server release 5.4), I found that installing form the RPM did not work properly. Some kernel module was not loaded.

After doing a little research and tweaking, I solved it by compiling it from source, and following the steps below:

• 1) Modify your configure.in file, by adding:
  KERNEL_HEADERS=/usr/src/kernels/your_current_kernel
  And substituting “your_current_kernel” with yours (e.g. 2.6.18-164.11.1.el5xen-x86_64).
• 2) Place that line of code, at around line 405, right before:
  if test -z "$KERNEL_HEADERS";
• 3) From the shell, run the following to complete the installation:
  autoconf
./configure
make
sudo make install

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Last revised on 2010/02/02