105 lines
3.6 KiB
Markdown
105 lines
3.6 KiB
Markdown
Compiling Lean with Split Stacks
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================================
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[Split stacks](http://gcc.gnu.org/wiki/SplitStacks) is a relatively
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new feature in gcc. It allows the stack to grown automatically as
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needed. There is a small performance penalty since the program stack
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is stored in the heap. However, we can have multiple threads, each starting
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with a small stack, and have the stack grow and shrink as required by
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the program.
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In principle, it is possible to build a program that uses split-stacks
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with libraries that do not. However, it did not work in our experiments.
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To be able to compile Lean with split-stacks, we also have to compile
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GMP, MPFR and Lua using split-stacks.
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We also had to use the [gold linker](<http://en.wikipedia.org/wiki/Gold_(linker)>).
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Gold linker
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-----------
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The gold linker is called `ld.gold` (in our test system). On Ubuntu, you
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can install it by executing
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sudo apt-get install binutils-gold
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Before we compiled GMP, MPFR, Lua, and Lean, we created an alias
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alias ld=ld.gold
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If everything is working correctly, when we execute `ld --version`, we should
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get an output like the following one:
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GNU gold (GNU Binutils for Ubuntu 2.22) 1.11
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Copyright 2011 Free Software Foundation, Inc.
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...
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Compiling GMP using split-stacks
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--------------------------------
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Download GMP from [https://gmplib.org](https://gmplib.org/); uncompress the gmp tar-ball at `$HOME/tools`; and configure it using
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./configure CFLAGS=-fsplit-stack --prefix=$HOME/tools/split-stack --enable-static
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Then, build and install using
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make
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make install
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We should have the file `libgmp.a` at `$HOME/tools/split-stack/lib`.
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Compiling MPFR using split-stacks
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----------------------------------
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Download MPFR from [http://www.mpfr.org/](http://www.mpfr.org/); uncompress the mpfr tar-ball at `$HOME/tools`; and configure it using
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./configure CFLAGS=-fsplit-stack --prefix=$HOME/tools/split-stack --with-gmp-include=$HOME/tools/split-stack/include --with-gmp-lib=$HOME/tools/split-stack/lib --enable-static
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Make sure MPFR does not produce any warning/error message. Then, build and install using:
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make
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make install
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We should have the file `libmpfr.a` at `$HOME/tools/split-stack/lib`.
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Compiling Lua using split-stacks
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--------------------------------
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Download Lua from [http://www.lua.org/](http://www.lua.org/); uncompress the Lua tar-ball at `$HOME/tools`.
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Then, modify the following line in the file `src/Makefile` in the Lua directory.
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CFLAGS= -O2 -Wall -DLUA_COMPAT_ALL $(SYSCFLAGS) $(MYCFLAGS)
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We should include the option `-fsplit-stack`
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CFLAGS= -O2 -fsplit-stack -Wall -DLUA_COMPAT_ALL $(SYSCFLAGS) $(MYCFLAGS)
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Then, build and install using
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make linux
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make linux install INSTALL_TOP=$HOME/tools/split-stack
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We should have the file `liblua.a` at `$HOME/tools/split-stack/lib`.
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Compiling Lean using split-stacks
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--------------------------------
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Go to the Lean directory, and create the folder `build/release`
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mkdir build/release
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Configure Lean using
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cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_CXX_COMPILER=g++ -D TCMALLOC=OFF -D LUA_LIBRARIES=$HOME/tools/split-stack/lib/liblua.a -D LUA_INCLUDE_DIR=$HOME/tool/split-stack/include -D GMP_INCLUDE_DIR=$HOME/tools/split-stack/include -D GMP_LIBRARIES=$HOME/tools/split-stack/lib/libgmp.a -D MPFR_LIBRARIES=$HOME/tools/split-stack/lib/libmpfr.a ../../src
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Remark: if you have ninja build tool installed in your system, you can also provide `-G Ninja`
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Then, build using
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make
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and, test it
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yes "C" | ctest
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The Lean executable will be located at `build/release/shell/lean`.
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