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These installation instructions assume basic familiarity with the Unix command line and that you are building from sources obtained from https://flaterco.com/xtide/files.html. If this is a big ask, there are other options:
The "tested" versions of libraries cited below are merely the versions that were demonstrated to work at the time of the last XTide release, for information in case a compatibility issue arises.
In addition to the minimal set of X11 libraries that pretty much everyone has, you need the following libraries:
Debian/Ubuntu users can install the dependencies by doing this:
sudo apt-get install
xorg-dev libxaw3dxft8-dev libpng-dev
and then building libtcd from source (
configure; make; sudo make install).
The interactive client requires that the Schumacher fonts be installed with X11. These fonts are always included with the X11 distribution, but their installation is frequently optional.
tide and xttpd can be compiled in the absence of X11 libraries and libXpm. However, you still need the other stuff.
The configure script will look for Xaw3dXft, Xaw3d, or Xaw, in that order.
|Plain Athena Widgets (Xaw) (tested ver. 1.0.12 / X11R7.7) can be forced using ––disable-3d.|
|Xaw3d (tested ver. 1.6.2) is a fork from an old version of Athena Widgets that offers improved scrollbars and a different look for buttons. Versions 1.6 through 1.6.2 appeared in Q1 2012; prior to that, version 1.5E had been frozen since 2003. Some issues that were subsequently fixed in Athena Widgets, such as long menus running off the screen, were fixed differently in Xaw3d. (This affects the Set Time dialog, where the list of years to choose from can be quite long.)|
Xaw3dXft is a fork from Xaw3d 1.5E that uses FreeType fonts. The primary site is http://sourceforge.net/projects/sf-xpaint/files/libxaw3dxft/. If font quality is important, Xaw3dXft is the best choice. It also fixes the problem with long menus in the Set Time dialog.
Xaw3dXft ver. 1.6.2d made breaking changes to the API. XTide 2.15 will work with 1.6.2d but no earlier version. XTide 2.14 works with several earlier versions but fails to build with 1.6.2d.
I recommend configuring Xaw3dXft with the following options:
XTide will link with libgps if a compatible version is found on the system (tested ver. 3.16). If a GPS is present and working, XTide will zoom in on your current location automatically.
XTide will link with libdstr if a compatible version is found on the system (tested ver. 1.0). If no compatible libdstr is present, a local copy of Dstr 1.0 will be rolled into libxtide.
Mandatory: You need the XTide source code distribution, available in bzipped tar format at https://flaterco.com/xtide/files.html#xtide.
Mandatory: You need at least one harmonics file. Harmonics files contain the data that are required for XTide to predict tides for different locations. Harmonics files are available at https://flaterco.com/xtide/files.html#harmonicsfiles.
Optional: If you want to enable XTide to draw coastlines on the map, you will also have to download the World Vector Shoreline (WVS) files, which are available in bzipped tar format at https://flaterco.com/xtide/files.html#WVS.
You will download a file with a name similar to harmonics-dwf-YYYYMMDD-free.tar.bz2. With GNU tar, you can unpack it as follows:
tar xvf harmonics-dwf-YYYYMMDD-free.tar.bz2
With another tar that does not include builtin support for bzip2, you need to do this instead:
bzip2 -dc harmonics-dwf-YYYYMMDD-free.tar.bz2 | tar xvf -
Unpack the archive in a temporary directory, then move the TCD file to a permanent location, e.g., /usr/local/share/xtide, and make it world readable:
mkdir /usr/local/share/xtide chmod 755 /usr/local/share/xtide chmod 644 harmonics-dwf-YYYYMMDD-free.tcd mv harmonics-dwf-YYYYMMDD-free.tcd /usr/local/share/xtide
The tar file also includes a change log and the disclaimers and terms applying to the data.
Under Linux and any other system with GNU tar:
tar xvf wvs.tar.bz2
bzip2 -dc wvs.tar.bz2 | tar xvf -
Under Linux and any other system with GNU tar:
tar xvf xtide-2.xyz.tar.bz2
bzip2 -dc xtide-2.xyz.tar.bz2 | tar xvf -
There are two ways to do this.
The first way is by setting the environment variable HFILE_PATH.
In the event that you have more than one harmonics file that you wish to use simultaneously, list them separated by colons.
Alternately, make sure that they are by themselves in a special directory and specify that directory as the value of HFILE_PATH. If an element of HFILE_PATH is a directory, XTide will attempt to load every file in that directory (so be sure that they are all harmonics files!)
If you are installing as root, then it is recommended that you add this definition to a system-wide script such as /etc/profile if you have one. In Debian/Ubuntu, system-wide environment variables can be added to /etc/environment.
The other way is by creating the file /etc/xtide.conf. The environment variable, if set, takes precedence over the config file.
If a configuration file is used, the first line should consist of the value that would be assigned to HFILE_PATH:
Either set the environment variable WVS_DIR to the name of that directory or supply the directory name as the second line of the configuration file /etc/xtide.conf.
XTide is packaged with the popular and portable GNU
automake, so all usual GNU tricks should work. Help
on configuration options can be found in the CONFIGURE-HELP file or
obtained by entering
The web server xttpd is not necessary to use tide or xtide, so most users needn't worry about it. However, if you plan to run it, there is additional configuration at this point.
(New in XTide 2.15) If your
system uses systemd instead
of init, you must configure with
--enable-systemd to be able to
run xttpd as a systemd service.
To change the user and/or group under which xttpd tries to
run (the defaults are nobody/nobody), provide the options
--with-xttpd-group=group to configure. If you want to
run xttpd but you don't
have root, you will have to set these to your own username and the
name of some group to which you belong.
bash-3.1$ ./configure --with-xttpd-user=xttpd --with-xttpd-group==xttpd
You can also set the webmaster address for xttpd this way.
bash-3.1$ ./configure --with-webmaster="firstname.lastname@example.org"
|Work around Y2038 problem; disable time zones. See Appendix A — Historical predictions and Y2038 compliance.|
|Use with g++ –Wall –Wextra to make warnings smarter.|
|Use ; instead of : to separate names in HFILE_PATH (good idea if they begin with C:\).|
|Use only genuine Athena Widgets.|
|Link with libm_hard instead of libm (for ARM Android).|
|(Experimental) Replace calendar mode moon phase column with moon age.|
You can change the compile-time defaults (colors, etc.) set in
libxtide/config.hh if you so choose. However, the easiest
way to set all of those things is with the control panel in the interactive XTide
The e-mail address for feedback in xttpd can also be changed by setting the environment variable XTTPD_FEEDBACK, in lieu of the configure option mentioned above.
$ make $ su # make install
$ make $ sudo make install
(With GNU make you can say
make -j 8 to run 8 compiles in
parallel if you want to speed it up.)
If xttpd was built with
steps are needed to complete the installation.
make install-systemdwill install xttpd.socket and xttpd.service into /lib/systemd/system.
make enable-systemddoes the following final steps:
systemctl enable xttpd.socket xttpd.service
systemctl start xttpd.socket xttpd.service
make barf-systemdwill dump the log for inspection (
journalctl -b -p debug --no-pager).
If you don't have any version of X11 installed and just want to compile
xttpd or tide, generate a Makefile using
2016-01: New maintainer David Strubbe reports that working, up-to-date build scripts are available from MacPorts.
Linux environments for Android now include Termux, UserLAnd and GNURoot. I have not explored these yet, but in 2018-10, Paul Poffenberger reported that XTide built "almost" out of the box using the tools available from Termux. (Linux software is expected to need patching when it is built for Termux.)
The XTide distribution does not provide a complete native Android app, but the basis for such an app, libxtide, can be built using the NDK. An example script for cross-compiling libpng, libtcd, libxtide, tide, and xttpd for Android on x86 or x86_64 Linux is in the XTide distribution as scripts/Android/build.sh. App developers can follow the example of MX Tides to add a JNI layer and GUI.
The tide and xttpd binaries produced by build.sh can be run from a shell prompt on a rooted device. Pointing a web browser at xttpd on the loopback address (http://127.0.0.1/) is a quick and dirty way to get a GUI. (Change for XTide 2.15: Android's xttpd now runs in the terminal instead of forking into the background, but otherwise works normally.)
XTide can be compiled and run using Cygwin, which is an emulated Unix environment for Windows that is free for typical non-commercial users. The Cygwin distribution and its full license terms are available from http://www.cygwin.com/.
Cygwin packages are all versioned separately, so there is no baseline "Cygwin version" against which to test XTide. Testing was most recently performed with XTide 2.15 using the collection of packages that was current as of 2016-01-23. As of then, the quirks apparent after brief testing were as follows:
[A prebuilt DOS binary for the command-line client is available in https://flaterco.com/xtide/files.html#contrib. It is usable in a DOS box under any 32-bit version of Windows and in DOSBox under 64-bit Windows.]
Don't laugh: the DOS binary works better under Windows than the native Windows one does.
A DOS binary for the command-line client tide can be built using DJGPP. The following instructions were last validated on 2016-01-25 with XTide 2.15 and DJGPP 2.05.
If using hard-core DOS, both a Long File Name (LFN) driver and a DPMI provider must be installed. Recommended:
LH DOSLFNMS.COMin AUTOEXEC.BAT.
If using a DOS box (CMD.EXE) in a 32-bit version of Windows, LFN and DPMI should just work.
When unpacking zip files, use the unzip32.exe that is distributed with DJGPP to prevent file names from getting broken.
File names on NTFS must be created in the DOS namespace. Linux
ntfs-3g doesn't do that. Similarly, the LFN implementation in Linux
vfat is not entirely compatible with doslfn. It only works reliably if
you mount the vfat partition with the option
For the validation build, the following DJGPP files were installed (unzipped in C:\DJGPP):
-rw-r--r-- 1 dave users 8842737 Jan 22 17:34 bnu2251br3.zip -rw-r--r-- 1 dave users 71339 Jan 22 17:36 csdpmi7b.zip -rw-r--r-- 1 dave users 2509574 Jan 22 17:32 djdev205.zip -rw-r--r-- 1 dave users 603760 Jan 22 17:32 djtzn205.zip -rw-r--r-- 1 dave users 28597989 Jan 22 17:39 gcc530b.zip -rw-r--r-- 1 dave users 13008311 Jan 22 17:38 gpp530b.zip -rw-r--r-- 1 dave users 8391218 Jan 22 17:37 gtxt192b.zip -rw-r--r-- 1 dave users 405500 Jan 22 17:35 mak41br2.zip -rw-r--r-- 1 dave users 1293982 Jan 22 17:37 png1610b.zip -rw-r--r-- 1 dave users 194774 Jan 22 17:37 zlib128br2.zip
SET PATH=C:\DJGPP\BIN;%PATH% SET DJGPP=C:\DJGPP\DJGPP.ENV SET TZ=:America/New_York
The environment variable TZ should be set to the zoneinfo identifier that is appropriate for your system clock. For example,
SET TZ=:America/New_York or SET TZ=:America/Los_Angeles or SET TZ=:UTCIf this is not done, predictions will still be technically correct, but XTide will have the wrong idea of the current time when deciding what range of predictions to generate.
make -f scripts\DOS\Makefile.dj2.
The following behaviors will differ from the default Unix behaviors:
[A prebuilt Windows binary for the command-line client is available in https://flaterco.com/xtide/files.html#contrib. It still runs in a DOS box, but is compatible with 64-bit Windows.]
When built with Visual Studio, XTide has to use an undesirable workaround for the absence of the Time Zone Database, and the resulting binary might not run on a different version of Windows. On 32-bit Windows, the DOS+DJGPP build is simply better. On 32- or 64-bit Windows, best results are obtained using Cygwin or a Linux VM.
The following instructions were last validated on 2016-01-25 with XTide 2.15 and Visual Studio Community 2015 with Update 1 under Windows 10 64-bit.
For Windows and Visual Studio, a script that builds zlib, libpng, libtcd, libxtide, and finally tide is available in the XTide distribution as scripts\VS\build.bat.
xtide...\scripts\VS\build.batto the working directory and edit it so that the version numbers specified at the top agree with what you have.
As configured, the following behaviors will differ from the default Unix behaviors:
For example, you could put the following in an xtide.conf file in the current working directory:
C:\Documents and Settings\Mumble\Foo\harmonics-free.tcd;C:\Documents and Settings\Mumble\Foo\harmonics-nonfree.tcd
There are some CPU bottlenecks that are observable only on very old hardware. Real time estimates in the following are from a 166 MHz Pentium PC:
The –aa setting that formerly could be used to speed up drawing on true color displays by disabling anti-aliasing was retired in XTide version 2.12.
Q: XTide compiles, but when I try to run it I get an error like the following about libtcd, libdstr, or libxtide:
error while loading shared libraries: libtcd.so.0: cannot open shared object file: No such file or directory
A: This happens when g++ found the shared library but your dynamic linker didn't. There are several possible fixes.
First, try running
ldconfig as root (
ldconfig on Debian-like distros). This will fix the problem if
the dynamic linker has a stale cache of the directory to which the libraries
were installed. But if the libraries were installed to a directory that
is not in the dynamic linker's search path, it won't make any difference.
If the libraries were installed to a nonstandard directory, the least invasive fix is to add that directory to the environment variable LD_LIBRARY_PATH. For example, if you find the library in /usr/local/lib, you would add this to your .bashrc (if using bash):
export LD_LIBRARY_PATH=/usr/local/libOr you would add this to your .cshrc (if using csh or tcsh):
setenv LD_LIBRARY_PATH /usr/local/lib
An alternative is to hard-code the directory into the executable using magic GNU linker switches: configure with LDFLAGS="–Wl,–rpath,/usr/local/lib" and rebuild XTide.
Another alternative is to edit the system configuration to add the
nonstandard directory to the dynamic linker's search path. On
Slackware, you just add the directory to /etc/ld.so.conf. Debian/Ubuntu
prefer to add files in the subdirectory /etc/ld.so.conf.d. After making
the change, run
ldconfig again to update the cache.
Finally, if all else fails, you could link statically with the missing libraries.
Q: When compiling XTide, I get thousands of warnings of the form "warning: 'auto_ptr' is deprecated".
A: To suppress these nuisance warnings in GCC, use CPPFLAGS="–Wno-deprecated-declarations" or upgrade to GCC 4.6 or newer.
Q: When compiling XTide, I get an error involving xml-something or lex.xml.c.
make xmlclean and then try again.
Q: Using a DJGPP-built tide program in a DOS box in a 32-bit version of Windows, I get
harmonics.tcd: No such file or directory (ENOENT).But the file is THERE!
A: When you do
dir /X, you should see this:
12/24/2012 03:15 PM 1,937,557 HARMON~1.TCD harmonics.tcdIf it says harmonics.tcd but not also HARMON~1.TCD, then the file was created in the wrong namespace. Recreate the file in a DOS box and confirm that HARMON~1.TCD then appears with
Q: Using a DJGPP-built tide program in a DOS box in a 32-bit version of Windows, I get "Your platform appears to have broken time zone support. You need to get the DJGPP zoneinfo package and unpack it in C:\DJGPP." But C:\DJGPP\zoneinfo is THERE!
Q: DOS again... I unzipped the files under Linux into a vfat (FAT) file system, and now I've got problems in DOS like missing header file, broken time zones....
A: Yup. There's something incompatible in the LFN
implementations. Don't ask me why, but this only works reliably if you
mount the vfat partition with the option
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