[oe] [meta-java][PATCH v2] icedtea7-native: make GCC 6 happy

[Dan McGregor]

On 21 June 2016 at 15:07, Dan McGregor <danismostlikely at gmail.com> wrote:
> From: Daniel McGregor <daniel.mcgregor at vecima.com>
>
> GCC 6 sets the default C++ standard to C++14 and introduces dead store
> elimination by default. icedtea7 is not ready for either of these
> changes, so just set the C++ standard back to gnu++98 and disable dead
> store elimination.
>
> Signed-off-by: Daniel McGregor <daniel.mcgregor at vecima.com>
> Signed-off-by: Dan McGregor <dan.mcgregor at usask.ca>

If this gets commited, can we remove the @usask.ca address from SOB?
It's not appropriate and I shouldn't have included it here.

> ---
>  recipes-core/icedtea/icedtea7-native.inc | 9 +++++++++
>  1 file changed, 9 insertions(+)
>
> diff --git a/recipes-core/icedtea/icedtea7-native.inc b/recipes-core/icedtea/icedtea7-native.inc
> index d624b7a..3344acb 100644
> --- a/recipes-core/icedtea/icedtea7-native.inc
> +++ b/recipes-core/icedtea/icedtea7-native.inc
> @@ -17,6 +17,13 @@ PACKAGECONFIG[x11] = ",--disable-headful,libx11-native xproto-native libxt-nativ
>  OEMAKE_BUILD_HEADLESS_ONLY = "${@bb.utils.contains('PACKAGECONFIG', 'x11', '', 'BUILD_HEADLESS_ONLY=1', d)}"
>  CFLAGS_append = "${@bb.utils.contains('PACKAGECONFIG', 'x11', '', ' -DHEADLESS=true', d)}"
>
> +# Disable dead store elimination and set C++ standard to C++98.
> +# There are dead stores in the JVM that would be pretty hard to
> +# remove, so disable the optimisation in the compiler.
> +CFLAGS_append = " -fno-tree-dse"
> +CXXFLAGS_append = " -fno-tree-dse"
> +CXX_append = " -std=gnu++98"
> +
>  inherit native java autotools pkgconfig
>
>  JAVA_HOME[unexport] = "1"
> @@ -153,6 +160,8 @@ do_configure_append() {
>         for F in openjdk/hotspot/make/linux/makefiles/gcc.make openjdk/hotspot/agent/src/os/linux/Makefile ;
>         do
>                 sed -i \
> +                       -e"s|HOST_GCC = gcc$|HOST_GCC = ${CC}|" \
> +                       -e"s|HOST_CPP = g++$|HOST_CPP = ${CXX}|" \
>                         -e"s|gcc\$(GCC_SUFFIX)|${CC}|" \
>                         -e"s|g++\$(GCC_SUFFIX)|${CXX}|" \
>                         $F
> --
> 2.9.0
>