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add instructions for CMake users to README

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q-posev 2021-11-18 15:39:04 +01:00
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README.md
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@ -9,7 +9,7 @@ TREX library for efficient I/O.
## Minimal requirements (for users):
- Autotools (autoconf >= 2.69, automake >= 1.11, libtool >= 2.2)
- Autotools (autoconf >= 2.69, automake >= 1.11, libtool >= 2.2) or CMake (>= 3.16)
- C compiler (gcc/icc/clang)
- Fortran compiler (gfortran/ifort)
- HDF5 library (>= 1.8) [optional, recommended for high performance]
@ -45,13 +45,25 @@ TREX library for efficient I/O.
6. `make check`
7. `sudo make install`
## Installation procedure for CMake users (from the tarball or GitHub repo clone):
The aforementioned instructions rely on [Autotools](https://www.gnu.org/software/automake/manual/html_node/Autotools-Introduction.html) build system.
[CMake](https://cmake.org) users can achieve the same with the following steps (an example of out-of-source build):
1. `cmake -S. -Bbuild`
2. `cd build`
3. `make`
4. `ctest` (or `make test`)
5. `sudo make install`
## Compilation without the HDF5 library
By default, the configuration step proceeds to search for the [HDF5 library](https://portal.hdfgroup.org/display/HDF5/HDF5).
This search can be disabled if HDF5 is not present/installable on the user machine.
To compile without HDF5, append `--without-hdf5` option to `configure` script. For example,
To build TREXIO without HDF5 back end, append `--without-hdf5` option to `configure` script or `-DENABLE_HDF5=OFF` option to `cmake`. For example,
`./configure --without-hdf5`
- `./configure --without-hdf5`
- `cmake -S. -Bbuild -DENABLE_HDF5=OFF`
## Linking to your program
@ -65,7 +77,9 @@ In order to link the program against TREXIO, the search paths can be modified as
(same holds for `$LD_LIBRARY_PATH`). The `<path_to_trexio>` has to be replaced by the prefix used during the installation.
If your compilation relies on some build tools (like Autotools or CMake), feel free to use the built-in solutions to locate and link external dependencies automatically.
If your project relies on CMake build system, feel free to use the
[FindTREXIO.cmake](https://github.com/TREX-CoE/trexio/blob/master/cmake/FindTREXIO.cmake)
module to find and link TREXIO library automatically.
In Fortran applications, make sure that the `trexio_f.f90` module file is included in the source tree.
You might have to manually copy it into your program source directory.