LDM Platform Requirements

Contents

• General Requirements
• Requirements for Installing from Source-Code

General Requirements

Your computer must

• Run some variant of a UNIX^® operating system.
• Have an ONC RPC runtime library. In particular, the library must have the function clnttcp_create(). This library is sometimes named librpcsoc.a.
• Have a standard user-shell (e.g., sh(1), ksh(1), bash(1)) .
• Have sufficient local disk-space for the LDM product-queue, which can range from a few megabytes to a few gigabytes in size -- depending on your data requirements.
• Have perl 5 installed.
• Have a monotonic clock accurate to within one millisecond. If the clock is not monotonic (because it is periodically set backwards by rdate, for example) then sequential reads from the product-queue might miss data-products that are inserted into the queue just after the adjustment.

The last requirement is absolutely necessary because the LDM protocol depends on accurate clocks on both the upstream host and the downstream host. This requirement can be satisfied by running a Network Time Protocol (NTP) daemon or by periodically executing the ntpdate(1) utility via crontab(1). Both an NTP daemon and the ntpdate(1) utility are available at ntp.org. Information on public NTP time servers is available at http://www.eecis.udel.edu/~mills/ntp/servers.html.

Requirements for Installing from Source-Code

You must have a UNIX^® development-environment. In particular, your platform must have:

• A Standard C compiler.
• Support for compiling code that uses ONC RPC (e.g., header-file <rpc.h>).
• A standard make(1) utility.
• The lex(1) and yacc(1) utilities (or workalikes like byacc, bison, flex, etc.).

While every effort is made to ensure that the LDM source-code distribution can be compiled and installed on as wide a variety of UNIX^® platforms as possible, we can, necessarily, only test on, and provide binary distributions for, platforms that are available at the Unidata Program Center (UPC).

With that in mind, the LDM package has been successfully built at the UPC on the following systems using the specified make(1) utility and C compiler:

OS1	Release2	Hardware Type(s)3	make(s)	C Compiler(s)
AIX	5.14	RS6000	/usr/ccs/bin/make GNU make	/usr/vac/bin/xlc5 gcc(v3.2)
AIX	4.34	RS6000	/usr/ccs/bin/make GNU make	/usr/ibmcxx/bin/xlc5 gcc(v2.95.2)
Darwin	7.5.0	Power Macintosh	/usr/bin/gnumake	/usr/bin/gcc-3.35
FreeBSD	4.10-RELEASE-p2	i386	/usr/bin/make	/usr/bin/c895 /usr/bin/cc
HP-UX	B.11.00	9000/785	/usr/ccs/bin/make GNU make	/opt/ansic/bin/c895 gcc(v3.3.2)
IRIX64	6.5	IP30	/sbin/make GNU make	/bin/cc5 gcc(v3.3)
Linux	2.4.22-1.2199.nptlsmp	i686	/usr/bin/make	/usr/bin/gcc5 (v3.3.2)
Linux	2.6.8-1.521smp	x86_64	/usr/bin/make	/usr/bin/gcc5 (v3.3.3)
Linux	2.6.8-1.521smp	i686	/usr/bin/make	/usr/bin/gcc5 (v3.3.3)
OSF1	V5.1	alpha	/usr/ccs/bin/make /usr/bin/posix/make /sbin/make	/bin/c895 gcc(v3.3.2)
SunOS	5.8	sun4u6	/usr/ccs/bin/make /usr/xpg4/bin/make GNU make	/opt/SUNWspro/WS6U2/bin/c895 /opt/SUNWspro/WS6U2/bin/cc gcc(v2.95.3)
SunOS	5.9	i86pc	/usr/ccs/bin/make /usr/xpg4/bin/make gmake	/opt/SUNWspro/prod/bin/cc5 gcc(v2.95.3)

1. This is the output of the command "uname -s".
2. This is the output of the command "uname -r" unless otherwise noted.
3. This is the output of the command "uname -m".
4. This is the output of the command "echo $(uname -v).$(uname -r)". Note that AIX's interpretation of release and version differs from that of most other operating systems.
5. This is the default compiler if the environment variable "CC" is unset and the environment variable "PATH" contains the given directory.
6. Alias SPARC.

The UPC reserves the right to deny support to outdated or irregular platforms.