[OCaml] Add (cross-)compiler shards

Author: topolarity

0_RootFS/OCaml/build_tarballs.jl

@@ -0,0 +1,96 @@
+### Instructions for adding a new version of the OCaml toolchain
+#
+# * update the `version` variable and `sources`
+# * To deploy the shard and automatically update your BinaryBuilderBase's
+#   `Artifacts.toml`, use the `--deploy` flag to the `build_tarballs.jl` script.
+#   You can build & deploy by running:
+#
+#      julia build_tarballs.jl --debug --verbose --deploy
+#
+
+using BinaryBuilderBase, BinaryBuilder, Pkg.Artifacts
+
+include("../common.jl")
+
+name = "OCamlBase"
+version = v"5.4.0"
+
+sources = [
+    # This is a pre-release version of OCaml 5.4.0, because the latest
+    # release (5.3.0) does not have cross-compilation support.
+    GitSource("https://github.com/ocaml/ocaml.git",
+              "411679d2e21e44f148deb1b3ff12355266fe26a0"),
+    DirectorySource("./bundled"),
+]
+
+# Check if deploy flag is set
+deploy = "--deploy" in ARGS
+
+# These are the targets we support right now:
+#   x86_64-w64-mingw32
+#   x86_64-apple-darwin
+#   aarch64-apple-darwin
+#   x86_64-linux-gnu
+#   x86_64-linux-musl
+#   aarch64-linux-gnu
+#   aarch64-linux-musl
+
+# The first thing we're going to do is to install Rust for all targets into a single prefix
+script = "version=$(version)\n" * raw"""
+cd ${WORKSPACE}/srcdir
+
+# Apply patches
+cd ocaml
+for f in ${WORKSPACE}/srcdir/patches/*.patch; do
+    atomic_patch -p1 ${f}
+done
+
+# Do a native build of OCaml
+./configure --build=${MACHTYPE} --host=${MACHTYPE} CC="$HOSTCC" CXX="$HOSTCXX" LD="$HOSTLD" STRIP="$HOSTSTRIP" AS="$HOSTAS"
+make -j${nproc}
+make install
+git clean -fxd
+
+# Build the cross-compiler
+unset CC
+./configure --prefix=${prefix} --host=${MACHTYPE} --build=${MACHTYPE} --target=${target}
+make crossopt -j${nproc}
+make installcross
+
+# Fix shebang of ocamlrun scripts to not hardcode a path of the build environment
+for bin in $(file ${bindir}/* | grep "a \S*/ocamlrun script" | cut -d: -f1); do
+    abspath=$(file ${bin} | grep -oh "a \S*/ocamlrun script" | cut -d' ' -f2)
+    sed -i "s?${abspath}?/usr/bin/env ocamlrun?" "${bin}"
+done
+"""
+
+# We assemble this giant tarball, then will split it up immediately after this:
+platforms = Platform[ host_platform ]
+products = Product[
+    # build with no products since all of our products are for the host, not the target
+
+    # ExecutableProduct("ocamlopt.opt", :ocamlopt),
+    # ExecutableProduct("ocamlc.opt", :ocamlc),
+    # ExecutableProduct("ocamlrun", :ocamlrun),
+]
+dependencies = Dependency[]
+
+name = "OCamlBase"
+compiler_target = try
+    parse(Platform, ARGS[end])
+catch
+    error("This is not a typical build_tarballs.jl!  Must provide exactly one platform as the last argument!")
+end
+deleteat!(ARGS, length(ARGS))
+
+# Build the tarballs
+ndARGS, deploy_target = find_deploy_arg(ARGS)
+build_info = build_tarballs(ndARGS, name, version, sources, script, Platform[compiler_target], products, dependencies;
+                            skip_audit=true, julia_compat="1.6", preferred_gcc_version=v"5")
+
+build_info = Dict(host_platform => first(values(build_info)))
+
+# Upload the artifacts (if requested)
+if deploy_target !== nothing
+    upload_and_insert_shards(deploy_target, name, version, build_info; target=compiler_target)
+end