travis: try to fix build

.travis.yml

@@ -38,8 +38,7 @@ before_script:
   - echo $LIBCLANG_PATH
 
 script:
-  - cargo build
-  - cargo build --verbose
+  - cargo build --verbose --features llvm_stable
   - make test
   - git add -A
   - git diff-index --quiet HEAD

Cargo.toml

@@ -18,6 +18,7 @@ syntex_syntax = "0.32"
 
 [features]
 static = []
+llvm_stable = []
 
 [lib]
 name = "bindgen"

Makefile

@@ -9,7 +9,7 @@ BINDGEN := ./target/debug/bindgen
 
 .PHONY: $(BINDGEN)
 $(BINDGEN):
-	cargo build
+	[ -f $@ ] || cargo build
 
 .PHONY: test
 test: regen-tests

src/clang.rs

@@ -135,10 +135,19 @@ impl Cursor {
         }
     }
 
+    #[cfg(not(feature="llvm_stable"))]
     pub fn is_inlined_function(&self) -> bool {
         unsafe { clang_Cursor_isFunctionInlined(self.x) != 0 }
     }
 
+    // TODO: Remove this when LLVM 3.9 is released.
+    //
+    // This is currently used for CI purposes.
+    #[cfg(feature="llvm_stable")]
+    pub fn is_inlined_function(&self) -> bool {
+        false
+    }
+
     // bitfield
     pub fn bit_width(&self) -> Option<u32> {
         unsafe {

src/clangll.rs

@@ -1109,6 +1109,7 @@ extern "C" {
     pub fn clang_Type_getTemplateArgumentAsType(T: CXType, i: c_int) ->
      CXType;
     pub fn clang_Cursor_isBitField(C: CXCursor) -> c_uint;
+    #[cfg(not(feature="llvm_stable"))]
     pub fn clang_Cursor_isFunctionInlined(C: CXCursor) -> c_uint;
     pub fn clang_isVirtualBase(arg1: CXCursor) -> c_uint;
     pub fn clang_getCXXAccessSpecifier(arg1: CXCursor) ->