40 lines
1.8 KiB
Markdown
40 lines
1.8 KiB
Markdown
## Location of data
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The data path is hardcoded such that the following tree structure is assumed:
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```
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data/
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grid.h5
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hydrodynamic_U.h5
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hydrodynamic_V.h5
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interactive-track-and-trace/
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opening-hdf5/
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...
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```
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## Compiling
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Let the current directory be the `src` directory. Run:
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```shell
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mkdir build
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cd build
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cmake ..
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make
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```
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### Building with Linux
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Makes use of `mdspan` which is not supported by glibc++ at time of writing. See [compiler support](https://en.cppreference.com/w/cpp/compiler_support/23) for `mdspan`. The solution to this is to use Clang and libc++; this is configured in our CMake setup, however the default installation of the `netcdf-cxx` package on at least Arch linux (and suspectedly Debian derivatives as well) specifically builds for the glibc implementation. To get the netcdf C++ bindings functional with the libc++ implementation, one needs to build from source. On Linux, this requires a few changes to the CMake file included with the netcdf-cxx source code, which are detailed below.
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Step-by-step to build the program using clang++ and libc++ on linux:
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1. Download the source code of netcdf-cxx, found at 'https://github.com/Unidata/netcdf-cxx4/releases/tag/v4.3.1' (make sure to download the release source code, as the master branch contains non-compilable code).
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2. Edit the CMakeLists.txt file, by appending '-stdlib=libc++' to the `CMAKE_CXX_FLAGS` variable in line 430. This means line 430 should read:
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```cmake
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SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -Wall -Wno-unused-variable -Wno-unused-parameter -stdlib=libc++")
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```
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2. Build the source code with the following:
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```sh
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mkdir build && cd build
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cmake .. -DCMAKE_CXX_COMPILER=/usr/bin/clang++
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make
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ctest
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sudo make install
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```
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3. Now the code should compile through the standard steps described in the Compiling section.
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