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Update README.md

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Signed-off-by: David Shah <dave@ds0.me>
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David Shah 2019-03-22 10:46:54 +00:00
parent 23f2fff1c8
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@ -36,6 +36,7 @@ of the selected architecture:
- Python 3.5 or later, including development libraries (`python3-dev` for Ubuntu)
- on Windows make sure to install same version as supported by [vcpkg](https://github.com/Microsoft/vcpkg/blob/master/ports/python3/CONTROL)
- Boost libraries (`libboost-dev libboost-filesystem-dev libboost-thread-dev libboost-program-options-dev libboost-python-dev libboost-dev` or `libboost-all-dev` for Ubuntu)
- Eigen3 (`libeigen3-dev` for Ubuntu) is required to build the analytic placer
- Latest git Yosys is required to synthesise the demo design
- For building on Windows with MSVC, usage of vcpkg is advised for dependency installation.
- For 32 bit builds: `vcpkg install boost-filesystem boost-program-options boost-thread boost-python qt5-base`
@ -119,11 +120,11 @@ Use cmake `-D` options to specify which version of nextpnr you want to build.
Use `-DARCH=...` to set the architecture. It is a semicolon separated list.
Use `cmake . -DARCH=all` to build all supported architectures.
The following runs a debug build of the iCE40 architecture without GUI
and without Python support and only HX1K support:
The following runs a debug build of the iCE40 architecture without GUI,
without Python support, without the HeAP analytic placer and only HX1K support:
```
cmake -DARCH=ice40 -DCMAKE_BUILD_TYPE=Debug -DBUILD_PYTHON=OFF -DBUILD_GUI=OFF -DICE40_HX1K_ONLY=1 .
cmake -DARCH=ice40 -DCMAKE_BUILD_TYPE=Debug -DBUILD_PYTHON=OFF -DBUILD_GUI=OFF -DBUILD_HEAP=OFF -DICE40_HX1K_ONLY=1 .
make -j$(nproc)
```
@ -134,6 +135,9 @@ cmake -DARCH=ice40 -DBUILD_PYTHON=OFF -DBUILD_GUI=OFF -DSTATIC_BUILD=ON .
make -j$(nproc)
```
The HeAP placer's solver can optionally use OpenMP for a speedup on very large designs. Enable this by passing
`-DUSE_OPENMP=yes` to cmake (compiler support may vary).
You can change the location where nextpnr will be installed (this will usually default to `/usr/local`) by using
`-DCMAKE_INSTALL_PREFIX=/install/prefix`.