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{ stdenv, git, openssl, autoconf, pkgs, makeStaticLibraries, version, gcc, src, coreutils }:
# Note that according to a benchmark run by Marc Feeley on May 2018,
# clang is 10x (with default settings) to 15% (with -O2) slower than GCC at compiling
# Gambit output, producing code that is 3x slower. IIRC the benchmarks from Gambit@30,
# the numbers were still heavily in favor of GCC in October 2019.
# Thus we use GCC over clang, even on macOS.
# Also note that I (fare) just ran benchmarks from https://github.com/ecraven/r7rs-benchmarks
# with Gambit 4.9.3 with -O1 vs -O2 vs -Os on Feb 2020. Which wins depends on the benchmark.
# The fight is unclear between -O1 and -O2, where -O1 wins more often, by up to 17%,
# but sometimes -O2 wins, once by up to 43%, so that overall -O2 is 5% faster.
# However, -Os seems more consistent in winning slightly against both -O1 and -O2,
# and is overall 15% faster than -O2. As for compile times, -O1 is fastest,
# -Os is about 29%-33% slower than -O1, while -O2 is about 40%-50% slower than -O1.
# Overall, -Os seems like the best choice, and that's what we now use.
stdenv.mkDerivation rec {
pname = "gambit";
inherit version;
inherit src;
bootstrap = import ./bootstrap.nix ( pkgs );
# TODO: if/when we can get all the library packages we depend on to have static versions,
# we could use something like (makeStaticLibraries openssl) to enable creation
# of statically linked binaries by gsc.
buildInputs = [ git autoconf bootstrap openssl ];
configureFlags = [
"--enable-single-host"
"--enable-c-opt=-Os"
"--enable-gcc-opts"
"--enable-shared"
"--enable-absolute-shared-libs" # Yes, NixOS will want an absolute path, and fix it.
"--enable-poll"
"--enable-openssl"
"--enable-default-runtime-options=f8,-8,t8" # Default to UTF-8 for source and all I/O
# "--enable-debug" # Nope: enables plenty of good stuff, but also the costly console.log
# "--enable-multiple-versions" # Nope, NixOS already does version multiplexing
# "--enable-guide"
# "--enable-track-scheme"
# "--enable-high-res-timing"
# "--enable-max-processors=4"
# "--enable-multiple-vms"
# "--enable-dynamic-tls"
# "--enable-multiple-threaded-vms" # when SMP branch is merged in
# "--enable-thread-system=posix" # default when --enable-multiple-vms is on.
# "--enable-profile"
# "--enable-coverage"
# "--enable-inline-jumps"
# "--enable-char-size=1" # default is 4
];
configurePhase = ''
export CC=${gcc}/bin/gcc CXX=${gcc}/bin/g++ \
CPP=${gcc}/bin/cpp CXXCPP=${gcc}/bin/cpp LD=${gcc}/bin/ld \
XMKMF=${coreutils}/bin/false
unset CFLAGS LDFLAGS LIBS CPPFLAGS CXXFLAGS
./configure --prefix=$out ${builtins.concatStringsSep " " configureFlags}
# OS-specific paths are hardcoded in ./configure
substituteInPlace config.status \
--replace /usr/local/opt/openssl/lib "${openssl.out}/lib" \
--replace /usr/local/opt/openssl@1.1/lib "${openssl.out}/lib"
./config.status
'';
buildPhase = ''
# Make bootstrap compiler, from release bootstrap
mkdir -p boot &&
cp -rp ${bootstrap}/. boot/. &&
chmod -R u+w boot &&
cd boot &&
cp ../gsc/makefile.in ../gsc/*.scm gsc && # */
./configure &&
for i in lib gsi gsc ; do (cd $i ; make ) ; done &&
cd .. &&
cp boot/gsc/gsc gsc-boot &&
# Now use the bootstrap compiler to build the real thing!
make -j2 from-scratch
'';
doCheck = true;
meta = {
description = "Optimizing Scheme to C compiler";
homepage = "http://gambitscheme.org";
license = stdenv.lib.licenses.lgpl2;
# NB regarding platforms: only actually tested on Linux, *should* work everywhere,
# but *might* need adaptation e.g. on macOS.
platforms = stdenv.lib.platforms.unix;
maintainers = with stdenv.lib.maintainers; [ thoughtpolice raskin fare ];
};
}
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