To install: 0. If you are reading this and suspect that you may not know what you are doing, stop and check to see if an lcalc package is available for your Linux distribution. The easiest way to install lcalc "correctly" is to let someone else do it for you. Likewise if you use Homebrew, Conda, or Nix to manage your software packages. Otherwise, if you think that you want to configure, compile, test, and install lcalc yourself... proceed. 1. Download and decompress the tarball. If you're downloading version 2.0.0, for example, the tarball should be called lcalc-2.0.0.tar.xz. It can be extracted on the command line using tar: $ tar -xJf lcalc-2.0.0.tar.gz This will create a new directory name "lcalc-2.0.0" containing the source code for the project. If, on the other hand, you are using a graphical file manager (on, say, Windows or OSX), you can most likely extract the tarball simply by clicking on it. 2) Configure the build. Lcalc comes with a "configure" script that is used to... well, to configure it. Run, $ ./configure --help in the project's directory to obtain a summary of its usage. The design of every "configure" script is more or less the same. We have included a documentation file called "INSTALL.automake" that contains generic instructions for the script. If they're confusing, you probably just want to use the default set of options by running $ ./configure with no arguments. Below we summarize the few lcalc-specific options that the "configure" script takes: * --with-pari Adds support for elliptic-curve L-functions using the PARI library. Requires that PARI be installed on your system in a location that your compiler and linker know about. * --enable-precision=<type> Specify how much precision you want in your floating-point numbers. The valid values for <type> are "double", "double-double", "quad-double", and "multiple". The default is "double". Both double-double and quad-double precisions require the David H. Bailey's "qd" library <https://www.davidhbailey.com/dhbsoftware/>. The "multiple" precision requires MPFR <https://www.mpfr.org/>. * --enable-openmp This experimental option compiles everything with support for multithreading using OpenMP <https://www.openmp.org/>. The "configure" script will check that your system has all of the dependencies required to built lcalc. If any are missing, it will inform you; otherwise, you're ready to build lcalc and libLfunction. 3. Compiling lcalc and libLfunction This step is easy. Run, $ make in the top-level project directory. 4. Testing (optional) Lcalc comes with a test suite for both the "lcalc" program and the libLfunction library. To run the test suite, run $ make check in the top-level project directory after you've successfully built the project (as in the previous step). Ideally you will see a series of PASS results. If you see any FAIL results, please let us know. 5) Installation Now that the project is builtand you've (maybe) tested the result, you're ready to install it. Again, this is easy if you've made the right choices during the configuration step. Run, $ make install and everything should be installed to the locations determined by the "configure" script. Note that, by default, this will try to install files to e.g. /usr/local and will require root privileges. If you want to install lcalc for only your user account, go back to the configuration step and select a --prefix that is writable by your user. This will install the "lcalc" program to your chosen --bindir, the libLfunction library to your --libdir, and its headers to your --includedir. 6. Uninstallation The installed project files can also be removed automatically, so long as you keep the (unmodified) source tree around. At any later time, you can run $ make uninstall to remove the files that were installed by "make install". If root privileges were required during installation, they will also be required for uninstallation.
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