rust: subprojects: add libc crate

This allows access to errno values.

Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

subprojects/.gitignore

@@ -11,6 +11,7 @@
 /bilge-impl-0.2.0
 /either-1.12.0
 /itertools-0.11.0
+/libc-0.2.162
 /proc-macro-error-1.0.4
 /proc-macro-error-attr-1.0.4
 /proc-macro2-1.0.84

subprojects/libc-0.2-rs.wrap

@@ -0,0 +1,7 @@
+[wrap-file]
+directory = libc-0.2.162
+source_url = https://crates.io/api/v1/crates/libc/0.2.162/download
+source_filename = libc-0.2.162.tar.gz
+source_hash = 18d287de67fe55fd7e1581fe933d965a5a9477b38e949cfa9f8574ef01506398
+#method = cargo
+patch_directory = libc-0.2-rs

subprojects/packagefiles/libc-0.2-rs/meson.build

@@ -0,0 +1,37 @@
+project('libc-0.2-rs', 'rust',
+  meson_version: '>=1.5.0',
+  version: '0.2.162',
+  license: 'MIT OR Apache-2.0',
+  default_options: [])
+
+_libc_rs = static_library(
+  'libc',
+  files('src/lib.rs'),
+  gnu_symbol_visibility: 'hidden',
+  override_options: ['rust_std=2015', 'build.rust_std=2015'],
+  rust_abi: 'rust',
+  rust_args: [
+    '--cap-lints', 'allow',
+    '--cfg', 'freebsd11',
+    '--cfg', 'libc_priv_mod_use',
+    '--cfg', 'libc_union',
+    '--cfg', 'libc_const_size_of',
+    '--cfg', 'libc_align',
+    '--cfg', 'libc_int128',
+    '--cfg', 'libc_core_cvoid',
+    '--cfg', 'libc_packedN',
+    '--cfg', 'libc_cfg_target_vendor',
+    '--cfg', 'libc_non_exhaustive',
+    '--cfg', 'libc_long_array',
+    '--cfg', 'libc_ptr_addr_of',
+    '--cfg', 'libc_underscore_const_names',
+    '--cfg', 'libc_const_extern_fn',
+  ],
+  dependencies: [],
+)
+
+libc_dep = declare_dependency(
+  link_with: _libc_rs,
+)
+
+meson.override_dependency('libc-0.2-rs', libc_dep)