Patch for HowToBuildOnARM documentation from Wei-Ren Chen.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164776 91177308-0d34-0410-b5e6-96231b3b80d8
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+.. _how_to_build_on_arm:
+
+===================================================================
+How To Build On ARM
+===================================================================
+
+.. sectionauthor:: Wei-Ren Chen (陳韋任) <chenwj@iis.sinica.edu.tw>
+
+Introduction
+============
+
+This document contains information about building/testing LLVM and
+Clang on ARM.
+
+Notes On Building LLVM/Clang on ARM
+=====================================
+Here are some notes on building/testing LLVM/Clang on ARM. Note that
+ARM encompasses a wide variety of CPUs; this advice is primarily based
+on the ARMv6 and ARMv7 architectures and may be inapplicable to older chips.
+
+#. If you are building LLVM/Clang on an ARM board with 1G of memory or less,
+ please use ``gold`` rather then GNU ``ld``.
+ Building LLVM/Clang with ``--enable-optimized``
+ is prefered since it consumes less memory. Otherwise, the building
+ process will very likely fail due to insufficient memory. In any
+ case it is probably a good idea to set up a swap partition.
+
+#. If you want to run ``make
+ check-all`` after building LLVM/Clang, to avoid false alarms (eg, ARCMT
+ failure) please use the following configuration:
+
+ .. code-block:: bash
+
+ $ ../$LLVM_SRC_DIR/configure --with-abi=aapcs