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| -rw-r--r-- | llvm/docs/HowToCrossCompileLLVM.rst | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/docs/HowToCrossCompileLLVM.rst b/llvm/docs/HowToCrossCompileLLVM.rst index e8e5fefa39b..e71c0b07a7a 100644 --- a/llvm/docs/HowToCrossCompileLLVM.rst +++ b/llvm/docs/HowToCrossCompileLLVM.rst @@ -39,6 +39,7 @@ For more information on how to configure CMake for LLVM/Clang, see :doc:`CMake`. The CMake options you need to add are: + * ``-DCMAKE_CROSSCOMPILING=True`` * ``-DCMAKE_INSTALL_PREFIX=<install-dir>`` * ``-DLLVM_TABLEGEN=<path-to-host-bin>/llvm-tblgen`` @@ -49,12 +50,14 @@ The CMake options you need to add are: If you're compiling with GCC, you can use architecture options for your target, and the compiler driver will detect everything that it needs: + * ``-DCMAKE_CXX_FLAGS='-march=armv7-a -mcpu=cortex-a9 -mfloat-abi=hard'`` However, if you're using Clang, the driver might not be up-to-date with your specific Linux distribution, version or GCC layout, so you'll need to fudge. In addition to the ones above, you'll also need: + * ``'-target arm-linux-gnueabihf'`` or whatever is the triple of your cross GCC. * ``'--sysroot=/usr/arm-linux-gnueabihf'``, ``'--sysroot=/opt/gcc/arm-linux-gnueabihf'`` or whatever is the location of your GCC's sysroot (where /lib, /bin etc are). |
