Oh, and the bug id is 8075511
https://bugs.openjdk.java.net/browse/JDK-8075511

/Mikael

On 2015-03-19 14:56, Mikael Gerdin wrote:
Hi,

I recently ran into a compiler warning which is enabled by default in
Solaris Studio, since HotSpot builds with warnings-as-errors this failed
the build only when I got to the Solaris build.
To catch this issue earlier for me (and a lot of others who use Linux as
their preferred development platform) I suggest that we enable the
equivalent warning for GCC.

The patch to implement the change is inined below:

diff --git a/make/linux/makefiles/gcc.make b/make/linux/makefiles/gcc.make
--- a/make/linux/makefiles/gcc.make
+++ b/make/linux/makefiles/gcc.make
@@ -207,7 +207,7 @@
    WARNINGS_ARE_ERRORS += -Wno-return-type -Wno-empty-body
  endif

-WARNING_FLAGS = -Wpointer-arith -Wsign-compare -Wundef
-Wunused-function -Wunused-value -Wformat=2 -Wreturn-type
+WARNING_FLAGS = -Wpointer-arith -Wsign-compare -Wundef
-Wunused-function -Wunused-value -Wformat=2 -Wreturn-type
-Woverloaded-virtual

  ifeq ($(USE_CLANG),)
    # Since GCC 4.3, -Wconversion has changed its meanings to warn these
implicit

I've verified the change by building on all linux platforms through JPRT.

/Mikael

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