Merging upstream version 1.71.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

7 files changed, 211 insertions, 0 deletions

diff --git a/vendor/cxx/tools/bazel/BUILD b/vendor/cxx/tools/bazel/BUILD
new file mode 100644
index 000000000..d42fc71c8
--- /dev/null
+++ b/vendor/cxx/tools/bazel/BUILD
@@ -0,0 +1,7 @@
+load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
+
+bzl_library(
+    name = "bzl_srcs",
+    srcs = glob(["**/*.bzl"]),
+    visibility = ["//visibility:public"],
+)
diff --git a/vendor/cxx/tools/bazel/rust_cxx_bridge.bzl b/vendor/cxx/tools/bazel/rust_cxx_bridge.bzl
new file mode 100644
index 000000000..c7d07e8a1
--- /dev/null
+++ b/vendor/cxx/tools/bazel/rust_cxx_bridge.bzl
@@ -0,0 +1,49 @@
+# buildifier: disable=module-docstring
+load("@bazel_skylib//rules:run_binary.bzl", "run_binary")
+load("@rules_cc//cc:defs.bzl", "cc_library")
+
+def rust_cxx_bridge(name, src, deps = []):
+    """A macro defining a cxx bridge library
+
+    Args:
+        name (string): The name of the new target
+        src (string): The rust source file to generate a bridge for
+        deps (list, optional): A list of dependencies for the underlying cc_library. Defaults to [].
+    """
+    native.alias(
+        name = "%s/header" % name,
+        actual = src + ".h",
+    )
+
+    native.alias(
+        name = "%s/source" % name,
+        actual = src + ".cc",
+    )
+
+    run_binary(
+        name = "%s/generated" % name,
+        srcs = [src],
+        outs = [
+            src + ".h",
+            src + ".cc",
+        ],
+        args = [
+            "$(location %s)" % src,
+            "-o",
+            "$(location %s.h)" % src,
+            "-o",
+            "$(location %s.cc)" % src,
+        ],
+        tool = "@cxx.rs//:codegen",
+    )
+
+    cc_library(
+        name = name,
+        srcs = [src + ".cc"],
+        deps = deps + [":%s/include" % name],
+    )
+
+    cc_library(
+        name = "%s/include" % name,
+        hdrs = [src + ".h"],
+    )
diff --git a/vendor/cxx/tools/buck/buildscript.bzl b/vendor/cxx/tools/buck/buildscript.bzl
new file mode 100644
index 000000000..e4d5e1e4e
--- /dev/null
+++ b/vendor/cxx/tools/buck/buildscript.bzl
@@ -0,0 +1,17 @@
+def buildscript_args(
+        name: str.type,
+        package_name: str.type,
+        buildscript_rule: str.type,
+        outfile: str.type,
+        version: str.type,
+        cfgs: [str.type] = [],
+        features: [str.type] = []):
+    _ = package_name
+    _ = version
+    _ = cfgs
+    _ = features
+    native.genrule(
+        name = name,
+        out = outfile,
+        cmd = "env RUSTC=rustc TARGET= $(exe %s) | sed -n s/^cargo:rustc-cfg=/--cfg=/p > ${OUT}" % buildscript_rule,
+    )
diff --git a/vendor/cxx/tools/buck/rust_cxx_bridge.bzl b/vendor/cxx/tools/buck/rust_cxx_bridge.bzl
new file mode 100644
index 000000000..18bb24585
--- /dev/null
+++ b/vendor/cxx/tools/buck/rust_cxx_bridge.bzl
@@ -0,0 +1,35 @@
+def rust_cxx_bridge(
+        name: str.type,
+        src: str.type,
+        deps: [str.type] = []):
+    native.genrule(
+        name = "%s/header" % name,
+        out = src + ".h",
+        cmd = "cp $(location :%s/generated)/generated.h ${OUT}" % name,
+    )
+
+    native.genrule(
+        name = "%s/source" % name,
+        out = src + ".cc",
+        cmd = "cp $(location :%s/generated)/generated.cc ${OUT}" % name,
+    )
+
+    native.genrule(
+        name = "%s/generated" % name,
+        srcs = [src],
+        out = ".",
+        cmd = "$(exe //:codegen) ${SRCS} -o ${OUT}/generated.h -o ${OUT}/generated.cc",
+        type = "cxxbridge",
+    )
+
+    native.cxx_library(
+        name = name,
+        srcs = [":%s/source" % name],
+        preferred_linkage = "static",
+        exported_deps = deps + [":%s/include" % name],
+    )
+
+    native.cxx_library(
+        name = "%s/include" % name,
+        exported_headers = [":%s/header" % name],
+    )
diff --git a/vendor/cxx/tools/buck/third_party.bzl b/vendor/cxx/tools/buck/third_party.bzl
new file mode 100644
index 000000000..84e5ca8f9
--- /dev/null
+++ b/vendor/cxx/tools/buck/third_party.bzl
@@ -0,0 +1,5 @@
+def third_party_rust_library(**kwargs):
+    native.rust_library(
+        doctests = False,
+        **kwargs
+    )
diff --git a/vendor/cxx/tools/buck/toolchains/BUCK b/vendor/cxx/tools/buck/toolchains/BUCK
new file mode 100644
index 000000000..6984a86b6
--- /dev/null
+++ b/vendor/cxx/tools/buck/toolchains/BUCK
@@ -0,0 +1,25 @@
+load("@prelude//toolchains:cxx.bzl", "system_cxx_toolchain")
+load("@prelude//toolchains:genrule.bzl", "system_genrule_toolchain")
+load("@prelude//toolchains:python.bzl", "system_python_bootstrap_toolchain")
+load("@prelude//toolchains:rust.bzl", "system_rust_toolchain")
+
+system_cxx_toolchain(
+    name = "cxx",
+    visibility = ["PUBLIC"],
+)
+
+system_genrule_toolchain(
+    name = "genrule",
+    visibility = ["PUBLIC"],
+)
+
+system_python_bootstrap_toolchain(
+    name = "python_bootstrap",
+    visibility = ["PUBLIC"],
+)
+
+system_rust_toolchain(
+    name = "rust",
+    default_edition = None,
+    visibility = ["PUBLIC"],
+)
diff --git a/vendor/cxx/tools/cargo/build.rs b/vendor/cxx/tools/cargo/build.rs
new file mode 100644
index 000000000..401c74186
--- /dev/null
+++ b/vendor/cxx/tools/cargo/build.rs
@@ -0,0 +1,73 @@
+use std::io::{self, Write};
+#[cfg(windows)]
+use std::os::windows::fs as windows;
+use std::path::Path;
+use std::process;
+#[cfg(windows)]
+use std::{env, fs};
+
+const MISSING: &str = "
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+When building `cxx` from a git clone, git's symlink support needs
+to be enabled on platforms that have it off by default (Windows).
+Either use:
+
+   $ git config --global core.symlinks true
+
+prior to cloning, or else use:
+
+   $ git clone -c core.symlinks=true https://github.com/dtolnay/cxx
+
+for the clone.
+
+Symlinks are only required when compiling locally from a clone of
+the git repository---they are NOT required when building `cxx` as
+a Cargo-managed (possibly transitive) build dependency downloaded
+through crates.io.
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+";
+
+#[cfg(windows)]
+const DENIED: &str = "
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+When building `cxx` from a git clone on Windows we need Developer
+Mode enabled for symlink support.
+
+To enable Developer Mode: go under Settings to Update & Security,
+then 'For developers', and turn on the toggle for Developer Mode.
+
+For more explanation of symlinks in Windows, see these resources:
+> https://blogs.windows.com/windowsdeveloper/2016/12/02/symlinks-windows-10/
+> https://docs.microsoft.com/windows/uwp/get-started/enable-your-device-for-development
+
+Symlinks are only required when compiling locally from a clone of
+the git repository---they are NOT required when building `cxx` as
+a Cargo-managed (possibly transitive) build dependency downloaded
+through crates.io.
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+";
+
+fn main() {
+    if Path::new("src/syntax/mod.rs").exists() {
+        return;
+    }
+
+    #[allow(unused_mut)]
+    let mut message = MISSING;
+
+    #[cfg(windows)]
+    if let Some(out_dir) = env::var_os("OUT_DIR") {
+        let parent_dir = Path::new(&out_dir).join("symlink");
+        let original_dir = parent_dir.join("original");
+        let link_dir = parent_dir.join("link");
+        if fs::create_dir_all(&original_dir).is_ok()
+            && (!link_dir.exists() || fs::remove_dir(&link_dir).is_ok())
+            && windows::symlink_dir(&original_dir, &link_dir).is_err()
+        {
+            message = DENIED;
+        }
+    }
+
+    let _ = io::stderr().write_all(message.as_bytes());
+    process::exit(1);
+}