Adapt for Solaris as before.

Author: jolars

src/tbb/build/SunOS.gcc.inc

@@ -25,8 +25,8 @@ OUTPUTOBJ_KEY = -o #
 PIC_KEY = -fPIC
 WARNING_AS_ERROR_KEY = -Werror
 WARNING_KEY = -Wall
-TEST_WARNING_KEY = -Wshadow -Wcast-qual -Woverloaded-virtual -Wnon-virtual-dtor -Wextra
-WARNING_SUPPRESS = -Wno-parentheses -Wno-non-virtual-dtor
+TEST_WARNING_KEY = -Wshadow -Wcast-qual -Woverloaded-virtual -Wnon-virtual-dtor $(if $(findstring cc4., $(runtime)),-Wextra)
+WARNING_SUPPRESS = -Wno-parentheses -Wno-non-virtual-dtor   
 DYLIB_KEY = -shared
 LIBDL = -ldl