Difference between revisions of "User:Hef/ispc on rpi2"

From Pumping Station One
 
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<syntaxHighlight lang=bash>
 
<syntaxHighlight lang=bash>
sudo apt-get install cmake gcc-4.8 g++-4.8
+
sudo apt-get install cmake gcc-4.8 g++-4.8 bison flex libncurses5-dev subversion
 
</syntaxHighlight>
 
</syntaxHighlight>
  
== ninja ==
+
== second attempt ==
 +
 
 +
<syntaxHighlight lang=bash>
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export LLVM_HOME=~/projects/llvm_home
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export ISPC_HOME=$PWD
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export CC=/usr/bin/gcc-4.8
 +
export CXX=/usr/bin/g++-4.8
 +
export CFLAGS="-march=armv7-a -mtune=cortex-a7 -mfpu=neon-vfpv4"
 +
export CXXFLAGS="-march=armv7-a -mtune=cortex-a7 -mfpu=neon-vfpv4"
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./alloy.py -b --version=3.5
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export PATH=$PATH:$LLVM_HOME/bin-3.5/bin
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 +
</syntaxHighlight>
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 +
I should try adding <code>export CFLAGS="-march=armv7-a -mtune=cortex-a7 -mfpu=neon-vfpv4"</code>
 +
 
 +
== first attempt ==
 +
 
 +
=== ninja ===
 
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<syntaxHighlight lang=bash>
 
git clone git://github.com/martine/ninja.git
 
git clone git://github.com/martine/ninja.git
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</syntaxHighlight>
 
</syntaxHighlight>
  
== clang ==
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=== clang ===
 
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<syntaxHighlight lang=bash>
 
git clone http://llvm.org/git/llvm.git
 
git clone http://llvm.org/git/llvm.git
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Ninja will take many hours to complete.
 
Ninja will take many hours to complete.
 +
I didn't fully test the <code>-j</code> (concurrent build) options to ninja.  ninja defaults to 6 on the rpi2.  You will run out of memory if you do this.  Even if you create larger swap for the pi, swapping to an sd card is a really major performance hit and you will be better of using fewer cores.
 +
 +
=== self hosted clang ===
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<syntaxHighlight lang=bash>
 +
cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_COMPILER=/usr/local/bin/clang -DCMAKE_CXX_COMPILER=/usr/local/bin/clang++ ../llvm -G Ninja
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</syntaxHighlight>
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=== ispc ===
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<syntaxHighlight lang=bash>
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make ARM_ENABLED=1 -j4
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</syntaxHighlight>

Latest revision as of 19:05, 27 March 2015

setup

gcc 4.6 both won't compile latest llvm/clang and will generate an ICE on older versions of clang.

sudo apt-get install cmake gcc-4.8 g++-4.8 bison flex libncurses5-dev subversion

second attempt

export LLVM_HOME=~/projects/llvm_home
export ISPC_HOME=$PWD
export CC=/usr/bin/gcc-4.8
export CXX=/usr/bin/g++-4.8
export CFLAGS="-march=armv7-a -mtune=cortex-a7 -mfpu=neon-vfpv4"
export CXXFLAGS="-march=armv7-a -mtune=cortex-a7 -mfpu=neon-vfpv4"
./alloy.py -b --version=3.5
export PATH=$PATH:$LLVM_HOME/bin-3.5/bin

I should try adding export CFLAGS="-march=armv7-a -mtune=cortex-a7 -mfpu=neon-vfpv4"

first attempt

ninja

git clone git://github.com/martine/ninja.git
cd ninja
git checkout release
./configure.py --bootstrap
sudo cp ninja /usr/local/bin/ninja

clang

git clone http://llvm.org/git/llvm.git
cd llvm/tools
git clone http://llvm.org/git/clang.git
cd ../../..
mkdir llvm-build
cd llvm-build
cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_COMPILER=/usr/bin/gcc-4.8 -DCMAKE_CXX_COMPILER=/usr/bin/g++-4.8 ../llvm -G Ninja
ninja -j1

Ninja will take many hours to complete. I didn't fully test the -j (concurrent build) options to ninja. ninja defaults to 6 on the rpi2. You will run out of memory if you do this. Even if you create larger swap for the pi, swapping to an sd card is a really major performance hit and you will be better of using fewer cores.

self hosted clang

cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_COMPILER=/usr/local/bin/clang -DCMAKE_CXX_COMPILER=/usr/local/bin/clang++ ../llvm -G Ninja

ispc

make ARM_ENABLED=1 -j4