rust: Emit -x c++ for bindgen modules with cpp_std
rust_bindgen modules which defined cpp_std with a .h file were not
correctly emitting the `-x c++` flag. This CL addresses that, and
ensures that if either cpp_std or c_std is set then the appropriate
behavior occurs no matter the file extension.
Bug: 304269101
Test: Soong tests
Change-Id: I71a8ae30ac0ed502d9d3fbf2f3039b0c56529d39
diff --git a/rust/bindgen.go b/rust/bindgen.go
index a80a587..ffe532f 100644
--- a/rust/bindgen.go
+++ b/rust/bindgen.go
@@ -124,18 +124,20 @@
ctx.PropertyErrorf("c_std", "c_std and cpp_std cannot both be defined at the same time.")
}
- if String(b.ClangProperties.Cpp_std) != "" {
+ if b.ClangProperties.Cpp_std != nil {
+ isCpp = true
if String(b.ClangProperties.Cpp_std) == "experimental" {
stdVersion = cc_config.ExperimentalCppStdVersion
- } else if String(b.ClangProperties.Cpp_std) == "default" {
+ } else if String(b.ClangProperties.Cpp_std) == "default" || String(b.ClangProperties.Cpp_std) == "" {
stdVersion = cc_config.CppStdVersion
} else {
stdVersion = String(b.ClangProperties.Cpp_std)
}
} else if b.ClangProperties.C_std != nil {
+ isCpp = false
if String(b.ClangProperties.C_std) == "experimental" {
stdVersion = cc_config.ExperimentalCStdVersion
- } else if String(b.ClangProperties.C_std) == "default" {
+ } else if String(b.ClangProperties.C_std) == "default" || String(b.ClangProperties.C_std) == "" {
stdVersion = cc_config.CStdVersion
} else {
stdVersion = String(b.ClangProperties.C_std)
diff --git a/rust/bindgen_test.go b/rust/bindgen_test.go
index 12cdb3c..0ba0ff8 100644
--- a/rust/bindgen_test.go
+++ b/rust/bindgen_test.go
@@ -115,7 +115,7 @@
ctx := testRust(t, `
rust_bindgen {
name: "libbindgen_cstd",
- wrapper_src: "src/any.h",
+ wrapper_src: "src/any.hpp",
crate_name: "bindgen",
stem: "libbindgen",
source_stem: "bindings",
@@ -141,6 +141,16 @@
if !strings.Contains(libbindgen_cppstd.Args["cflags"], "-std=foo") {
t.Errorf("cpp_std value not passed in to rust_bindgen as a clang flag")
}
+
+ // Make sure specifying cpp_std emits the '-x c++' flag
+ if !strings.Contains(libbindgen_cppstd.Args["cflags"], "-x c++") {
+ t.Errorf("Setting cpp_std should cause the '-x c++' flag to be emitted")
+ }
+
+ // Make sure specifying c_std omits the '-x c++' flag
+ if strings.Contains(libbindgen_cstd.Args["cflags"], "-x c++") {
+ t.Errorf("Setting c_std should not cause the '-x c++' flag to be emitted")
+ }
}
func TestBindgenDisallowedFlags(t *testing.T) {