ci: Remove llvm 5, introduce llvm 16

LLVM 5 is ancient.

.github/workflows/bindgen.yml

@@ -142,7 +142,7 @@ jobs:
           - debian: null
             cross: null
             rust: null
-        llvm_version: ["5.0", "9.0"]
+        llvm_version: ["9.0", "16.0"]
         main_tests: [1]
         release_build: [0, 1]
         no_default_features: [0, 1]
@@ -155,7 +155,7 @@ jobs:
           # Test with extra asserts + docs just with latest llvm versions to
           # prevent explosion
           - os: ubuntu-latest
-            llvm_version: "9.0"
+            llvm_version: "16.0"
             release_build: 0
             no_default_features: 0
             feature_extra_asserts: 1
@@ -169,17 +169,20 @@ jobs:
           #     debian: arm64
           #     cross: aarch64-linux-gnu
           #     rust: aarch64-unknown-linux-gnu
-          #   llvm_version: "9.0"
+          #   llvm_version: "16.0"
           #   main_tests: 0
           #   release_build: 0
           #   feature_extra_asserts: 0
 
           # Ensure stuff works on macos too
-          - os: macos-latest
-            llvm_version: "9.0"
-            release_build: 0
-            no_default_features: 0
-            feature_extra_asserts: 0
+          # Disabled for now because llvm doesn't provide releases for x86-64
+          # macOS which is what the runner uses.
+          #
+          # - os: macos-latest
+          #   llvm_version: "16.0"
+          #   release_build: 0
+          #   no_default_features: 0
+          #   feature_extra_asserts: 0
     steps:
       - uses: actions/checkout@v3
 

CONTRIBUTING.md

@@ -208,8 +208,8 @@ can add multiple test expectations, one for each supported `libclang`
 version. Instead of having a single `bindgen-tests/tests/expectations/tests/my_test.rs` file,
 add each of:
 
+* `bindgen-tests/tests/expectations/tests/libclang-16/my_test.rs`
 * `bindgen-tests/tests/expectations/tests/libclang-9/my_test.rs`
-* `bindgen-tests/tests/expectations/tests/libclang-5/my_test.rs`
 
 If you need to update the test expectations for a test file that generates
 different bindings for different `libclang` versions, you *don't* need to have
@@ -226,12 +226,6 @@ to check the bindings against with a cargo feature:
 $ cargo test --features __testing_only_libclang_$VERSION
 ```
 
-Where `$VERSION` is one of:
-
-* `4`
-* `3_9`
-* `3_8`
-
 depending on which version of `libclang` you have installed.
 
 ### Integration Tests

appveyor.yml

@@ -2,18 +2,18 @@ environment:
   RUST_BACKTRACE: 1
   RUST_CHANNEL: "%Configuration%"
   matrix:
-  - TARGET: gnu
-    LLVM_VERSION: 5.0.0-1
-    BINDGEN_FEATURES: __testing_only_libclang_5
   - TARGET: gnu
     LLVM_VERSION: 9.0.0-1
     BINDGEN_FEATURES: __testing_only_libclang_9
-  - TARGET: msvc
-    LLVM_VERSION: 5.0.0
-    BINDGEN_FEATURES: __testing_only_libclang_5
+  - TARGET: gnu
+    LLVM_VERSION: 16.0.4
+    BINDGEN_FEATURES: __testing_only_libclang_16
   - TARGET: msvc
     LLVM_VERSION: 9.0.0
     BINDGEN_FEATURES: __testing_only_libclang_9
+  - TARGET: msvc
+    LLVM_VERSION: 16.0.4
+    BINDGEN_FEATURES: __testing_only_libclang_16
 
 configuration:
 - stable

bindgen-cli/Cargo.toml

@@ -40,7 +40,7 @@ which-rustfmt = ["bindgen/which-rustfmt"]
 # Features used for CI testing 
 __testing_only_extra_assertions = ["bindgen/__testing_only_extra_assertions"]
 __testing_only_libclang_9 = ["bindgen/__testing_only_libclang_9"]
-__testing_only_libclang_5 = ["bindgen/__testing_only_libclang_5"]
+__testing_only_libclang_16 = ["bindgen/__testing_only_libclang_16"]
 
 [package.metadata.release]
 release = true

bindgen-cli/main.rs

@@ -13,10 +13,10 @@ use crate::options::builder_from_flags;
 #[cfg(feature = "logging")]
 fn clang_version_check() {
     let version = bindgen::clang_version();
-    let expected_version = if cfg!(feature = "__testing_only_libclang_9") {
+    let expected_version = if cfg!(feature = "__testing_only_libclang_16") {
+        Some((16, 0))
+    } else if cfg!(feature = "__testing_only_libclang_9") {
         Some((9, 0))
-    } else if cfg!(feature = "__testing_only_libclang_5") {
-        Some((5, 0))
     } else {
         None
     };

bindgen-integration/Cargo.toml

@@ -16,4 +16,4 @@ runtime = ["bindgen/runtime"]
 
 __testing_only_extra_assertions = ["bindgen/__testing_only_extra_assertions"]
 __testing_only_libclang_9 = ["bindgen/__testing_only_libclang_9"]
-__testing_only_libclang_5 = ["bindgen/__testing_only_libclang_5"]
+__testing_only_libclang_16 = ["bindgen/__testing_only_libclang_16"]

bindgen-tests/Cargo.toml

@@ -23,4 +23,4 @@ which-rustfmt = ["bindgen/which-rustfmt"]
 
 __testing_only_extra_assertions = ["bindgen/__testing_only_extra_assertions"]
 __testing_only_libclang_9 = ["bindgen/__testing_only_libclang_9"]
-__testing_only_libclang_5 = ["bindgen/__testing_only_libclang_5"]
+__testing_only_libclang_16 = ["bindgen/__testing_only_libclang_16"]

bindgen-tests/tests/expectations/build.rs

@@ -8,7 +8,7 @@ use std::fs;
 use std::io::Write;
 use std::path::Path;
 
-const LIBCLANG_VERSION_DIRS: &[&str] = &["libclang-5", "libclang-9"];
+const LIBCLANG_VERSION_DIRS: &[&str] = &["libclang-9"];
 
 fn main() {
     println!("cargo:rerun-if-changed=build.rs");