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{ gccStdenv, lib, pkgs,
git, openssl, autoconf, gcc, coreutils, gnused, gnugrep,
makeStaticLibraries,
src, version, git-version,
stampYmd ? 0, stampHms ? 0,
gambit-support,
optimizationSetting ? "-O1",
gambit-params ? pkgs.gambit-support.stable-params }:
# 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, but I care more about compile-time,
# so I stick with -O1 (in the defaults above), which is also the default for Gambit.
gccStdenv.mkDerivation rec {
pname = "gambit";
inherit src version git-version;
bootstrap = gambit-support.gambit-bootstrap;
nativeBuildInputs = [ git autoconf ];
# 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 = [ openssl ];
# TODO: patch gambit's source so it has the full path to sed, grep, fgrep? Is there more?
# Or wrap relevant programs to add a suitable PATH ?
#runtimeDeps = [ gnused gnugrep ];
configureFlags = [
"--enable-targets=${gambit-params.targets}"
"--enable-single-host"
"--enable-c-opt=${optimizationSetting}"
"--enable-c-opt-rts=-O2"
"--enable-gcc-opts"
"--enable-shared"
"--enable-absolute-shared-libs" # Yes, NixOS will want an absolute path, and fix it.
"--enable-openssl"
"--enable-dynamic-clib"
#"--enable-default-compile-options='(compactness 9)'" # Make life easier on the JS backend
"--enable-default-runtime-options=${gambit-params.defaultRuntimeOptions}"
# "--enable-rtlib-debug" # used by Geiser, but only on recent-enough gambit, and messes js runtime
# "--enable-debug" # Nope: enables plenty of good stuff, but also the costly console.log
# "--enable-multiple-versions" # Nope, NixOS already does version multiplexing
# "--enable-guide"
# "--enable-track-scheme"
# "--enable-high-res-timing"
# "--enable-max-processors=4"
# "--enable-multiple-vms"
# "--enable-dynamic-tls"
# "--enable-multiple-threaded-vms" # when SMP branch is merged in
# "--enable-thread-system=posix" # default when --enable-multiple-vms is on.
# "--enable-profile"
# "--enable-coverage"
# "--enable-inline-jumps"
# "--enable-char-size=1" # default is 4
# "--enable-march=native" # Nope, makes it not work on machines older than the builder
] ++ gambit-params.extraOptions
# Do not enable poll on darwin due to https://github.com/gambit/gambit/issues/498
++ lib.optional (!gccStdenv.isDarwin) "--enable-poll";
configurePhase = ''
export CC=${gccStdenv.cc}/bin/${gccStdenv.cc.targetPrefix}gcc \
CXX=${gccStdenv.cc}/bin/${gccStdenv.cc.targetPrefix}g++ \
CPP=${gccStdenv.cc}/bin/${gccStdenv.cc.targetPrefix}cpp \
CXXCPP=${gccStdenv.cc}/bin/${gccStdenv.cc.targetPrefix}cpp \
LD=${gccStdenv.cc}/bin/${gccStdenv.cc.targetPrefix}ld \
XMKMF=${coreutils}/bin/false
unset CFLAGS LDFLAGS LIBS CPPFLAGS CXXFLAGS
${gambit-params.fixStamp git-version stampYmd stampHms}
./configure --prefix=$out/gambit ${builtins.concatStringsSep " " configureFlags}
# OS-specific paths are hardcoded in ./configure
substituteInPlace config.status \
${lib.optionalString (gccStdenv.isDarwin && !gambit-params.stable)
''--replace "/usr/local/opt/openssl@1.1" "${lib.getLib openssl}"''} \
--replace "/usr/local/opt/openssl" "${lib.getLib openssl}"
./config.status
'';
buildPhase = ''
# The MAKEFLAGS setting is a workaround for https://github.com/gambit/gambit/issues/833
export MAKEFLAGS="--output-sync=recurse"
echo "Make bootstrap compiler, from release bootstrap"
mkdir -p boot
cp -rp ${bootstrap}/gambit/. boot/.
chmod -R u+w boot
cd boot
cp ../gsc/makefile.in ../gsc/*.scm gsc/
echo > include/stamp.h # No stamp needed for the bootstrap compiler
./configure
for i in lib gsi gsc ; do (cd $i ; make -j$NIX_BUILD_CORES) ; done
cd ..
cp boot/gsc/gsc gsc-boot
echo "Now use the bootstrap compiler to build the real thing!"
make -j$NIX_BUILD_CORES from-scratch
${lib.optionalString gambit-params.modules "make -j$NIX_BUILD_CORES modules"}
'';
postInstall = ''
mkdir $out/bin
cd $out/bin
ln -s ../gambit/bin/* .
'';
doCheck = true;
dontStrip = true;
meta = gambit-support.meta;
}
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