diff -r f1391adc6681 -r f4414323345f make/solaris/makefiles/gcc.make
--- a/make/solaris/makefiles/gcc.make	Mon Nov 28 10:19:26 2011 +0100
+++ b/make/solaris/makefiles/gcc.make	Mon Nov 28 14:58:31 2011 +0100
@@ -49,7 +49,6 @@
 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0"
 # Allow the user to turn off precompiled headers from the command line.
 ifneq ($(USE_PRECOMPILED_HEADER),0)
-USE_PRECOMPILED_HEADER=1
 PRECOMPILED_HEADER_DIR=.
 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp
 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch
@@ -142,7 +141,7 @@
 endif
 
 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
-ifneq ($(USE_PRECOMPILED_HEADER),1)
+ifeq ($(USE_PRECOMPILED_HEADER),0)
 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
 endif