Merge pull request #132 from mihaip/upstream-volatile

Suppress Clang warnings about `volatile` being deprecated

cpu/ppc/CMakeLists.txt

@@ -5,4 +5,10 @@ file(GLOB SOURCES "${CMAKE_CURRENT_SOURCE_DIR}/*.cpp"
                   "${CMAKE_CURRENT_SOURCE_DIR}/*.h"
     )
 
+# The use of volatile is deprecated, but we still need it to avoid function
+# parameters being clobbered when using setjmp/longjmp.
+if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+    add_compile_options(-Wno-deprecated-volatile)
+endif()
+
 add_library(cpu_ppc OBJECT ${SOURCES})