Compiler.h: exclude clang from GCC_CHECK_VERSION()

src/Compiler.h

@@ -28,8 +28,13 @@
 #define GCC_VERSION 0
 #endif
 
+/**
+ * Are we building with the specified version of gcc (not clang or any
+ * other compiler) or newer?
+ */
 #define GCC_CHECK_VERSION(major, minor) \
-	(defined(__GNUC__) && GCC_VERSION >= GCC_MAKE_VERSION(major, minor, 0))
+	(defined(__GNUC__) && !defined(__clang__) && \
+	 GCC_VERSION >= GCC_MAKE_VERSION(major, minor, 0))
 
 /**
  * Are we building with clang (any version) or at least the specified
@@ -138,7 +143,7 @@
 
 #endif /* ! GCC_UNUSED >= 40300 */
 
-#if GCC_CHECK_VERSION(4,6) && !defined(__clang__)
+#if GCC_CHECK_VERSION(4,6)
 #define gcc_flatten __attribute__((flatten))
 #else
 #define gcc_flatten

src/fs/AllocatedPath.cxx

@@ -111,7 +111,7 @@ AllocatedPath::ChopSeparators()
 	while (l >= 2 && PathTraitsFS::IsSeparator(p[l - 1])) {
 		--l;
 
-#if GCC_CHECK_VERSION(4,7) && !defined(__clang__)
+#if GCC_CHECK_VERSION(4,7)
 		value.pop_back();
 #else
 		value.erase(value.end() - 1, value.end());