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8 This document contains information about building/testing LLVM and
11 Notes On Building LLVM/Clang on ARM
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13 Here are some notes on building/testing LLVM/Clang on ARM. Note that
14 ARM encompasses a wide variety of CPUs; this advice is primarily based
15 on the ARMv6 and ARMv7 architectures and may be inapplicable to older chips.
17 #. If you are building LLVM/Clang on an ARM board with 1G of memory or less,
18 please use ``gold`` rather then GNU ``ld``.
19 Building LLVM/Clang with ``--enable-optimized``
20 is prefered since it consumes less memory. Otherwise, the building
21 process will very likely fail due to insufficient memory. In any
22 case it is probably a good idea to set up a swap partition.
24 #. If you want to run ``make
25 check-all`` after building LLVM/Clang, to avoid false alarms (eg, ARCMT
26 failure) please use at least the following configuration:
30 $ ../$LLVM_SRC_DIR/configure --with-abi=aapcs-vfp
32 #. The most popular linaro/ubuntu OS's for ARM boards, eg, the
33 Pandaboard, have become hard-float platforms. The following set
34 of configuration options appears to be a good choice for this
39 ./configure --build=armv7l-unknown-linux-gnueabihf \
40 --host=armv7l-unknown-linux-gnueabihf \
41 --target=armv7l-unknown-linux-gnueabihf --with-cpu=cortex-a9 \
42 --with-float=hard --with-abi=aapcs-vfp --with-fpu=neon \
43 --enable-targets=arm --enable-optimized --enable-assertions