Submitted by Lilian Angel.

--- openjdk/hotspot/src/share/vm/adlc/adlc.hpp.ark 2008-01-11 14:15:41.000000000 +0000
+++ openjdk/hotspot/src/share/vm/adlc/adlc.hpp 2008-01-11 14:16:14.000000000 +0000
@@ -32,7 +32,7 @@
 // standard library constants
 #include "stdio.h"
 #include "stdlib.h"
-#if _MSC_VER >= 1300 // Visual C++ 7.0 or later
+#if (defined(__GNUC__) && __GNUC__ >= 3) || (_MSC_VER >= 1300) // gcc 3.0 or later or Visual C++ 7.0 or later
 #include <iostream>
 #else
 #include <iostream.h>
--- openjdk/hotspot/src/share/vm/adlc/filebuff.cpp.ark 2008-01-11 14:17:17.000000000 +0000
+++ openjdk/hotspot/src/share/vm/adlc/filebuff.cpp 2008-01-11 14:17:34.000000000 +0000
@@ -28,6 +28,8 @@
 // FILEBUFF.CPP - Routines for handling a parser file buffer
 #include "adlc.hpp"

+using namespace std;
+
 //------------------------------FileBuff--------------------------------------- // Create a new parsing buffer
 FileBuff::FileBuff( BufferedFile *fptr, ArchDesc& archDesc) : _fp(fptr), _AD(archDesc) {
--- openjdk/hotspot/src/share/vm/adlc/filebuff.hpp.ark 2008-01-11 14:14:45.000000000 +0000
+++ openjdk/hotspot/src/share/vm/adlc/filebuff.hpp 2008-01-11 14:15:34.000000000 +0000
@@ -27,7 +27,7 @@

 // FILEBUFF.HPP - Definitions for parser file buffering routines

-#if _MSC_VER >= 1300 // Visual C++ 7.0 or later
+#if (defined(__GNUC__) && __GNUC__ >= 3) || (_MSC_VER >= 1300) // gcc 3.0 or later, or Visual C++ 7.0 or later
 #include <iostream>
 #else
 #include <iostream.h>
@@ -99,8 +99,11 @@
   FileBuffRegion *copy(); // Deep copy
   FileBuffRegion *merge(FileBuffRegion*); // Merge 2 regions; delete input

-// void print(std::ostream&);
-// friend std::ostream& operator<< (std::ostream&, FileBuffRegion&);
+#if defined(__GNUC__) && __GNUC__ >= 3
+ void print(std::ostream&);
+ friend std::ostream& operator<< (std::ostream&, FileBuffRegion&);
+#else
   void print(ostream&);
   friend ostream& operator<< (ostream&, FileBuffRegion&);
+#endif
 };
--- openjdk/hotspot/build/linux/makefiles/gcc.make.ark 2008-01-11 14:24:05.000000000 +0000
+++ openjdk/hotspot/build/linux/makefiles/gcc.make 2008-01-11 14:24:27.000000000 +0000
@@ -94,7 +94,8 @@
 endif

 # Compiler warnings are treated as errors
-WARNINGS_ARE_ERRORS = -Werror
+# Commented out for now because of gcc 4.3 warnings OpenJDK isn't ready for
+#WARNINGS_ARE_ERRORS = -Werror
 # Except for a few acceptable ones
 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wconversion -Wsign-compare
 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(ACCEPTABLE_WARNINGS)
--- openjdk/hotspot/build/solaris/makefiles/gcc.make.ark 2008-01-11 14:24:33.000000000 +0000
+++ openjdk/hotspot/build/solaris/makefiles/gcc.make 2008-01-11 14:24:48.000000000 +0000
@@ -109,7 +109,8 @@


 # Compiler warnings are treated as errors
-WARNINGS_ARE_ERRORS = -Werror
+# Commented out for now because of gcc 4.3 warnings OpenJDK isn't ready for
+# WARNINGS_ARE_ERRORS = -Werror
 # Enable these warnings. See 'info gcc' about details on these options
 ADDITIONAL_WARNINGS = -Wpointer-arith -Wconversion -Wsign-compare
 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(ADDITIONAL_WARNINGS)
--- openjdk/jdk/make/common/Defs-linux.gmk.ark 2008-01-11 14:20:26.000000000 +0000
+++ openjdk/jdk/make/common/Defs-linux.gmk 2008-01-11 14:21:10.000000000 +0000
@@ -139,7 +139,9 @@
 # Treat compiler warnings as errors, if warnings not allowed
 #
 ifeq ($(COMPILER_WARNINGS_FATAL),true)
- GCC_WARNINGS += -Werror
+ # gcc 4.3 introduces new warnings OpenJDK code isn't quite ready for, such as+ # "cast from double to float may chance its value". Let's ignore this for now.
+ # GCC_WARNINGS += -Werror
 endif

 #
The original author is Lilian Angel ###@###.###