Fix for 32-bit SPARC (Kevin's old fix)

Author: jolars

src/tbb/build/SunOS.gcc.inc

@@ -64,9 +64,12 @@ ifeq (ia32,$(arch))
 endif 
 
 # for some gcc versions on Solaris, -m64 may imply V9, but perhaps not everywhere (TODO: verify)
+# RcppParallel: CRAN uses 32-bit SPARC so we force that here
 ifeq (sparc,$(arch))
-    CPLUS_FLAGS    += -mcpu=v9 -m64
-    LIB_LINK_FLAGS += -mcpu=v9 -m64
+    CPLUS_FLAGS += -m32
+    LIB_LINK_FLAGS += -m32
+#   CPLUS_FLAGS    += -mcpu=v9 -m64
+#   LIB_LINK_FLAGS += -mcpu=v9 -m64
 endif 
 
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