[patch] fix compiler flag for linux sparc targets

[Erik Joelsson]

Patch looks ok.

To my knowledge, nobody is actively keeping linux-sparc working in 9, so 
I would expect it to be broken.

/Erik

On 2016-09-05 13:10, Matthias Klose wrote:
> at least in 9b134 the build system currently picks up the wrong compiler flag on
> linux sparc targets. The patch below only applies it for solaris builds.
>
> --- a/common/autoconf/flags.m4
> +++ b/common/autoconf/flags.m4
> @@ -921,7 +921,7 @@
>     # Set some additional per-CPU defines.
>     if test "x$OPENJDK_$1_OS-$OPENJDK_$1_CPU" = xwindows-x86; then
>       $2JVM_CFLAGS="[$]$2JVM_CFLAGS -arch:IA32"
> -  elif test "x$OPENJDK_$1_CPU" = xsparcv9; then
> +  elif test "xx$OPENJDK_$1_OS-$OPENJDK_$1_CPU" = xsolaris-sparcv9; then
>       $2JVM_CFLAGS="[$]$2JVM_CFLAGS -xarch=sparc"
>     elif test "x$OPENJDK_$1_CPU" = xppc64; then
>       if test "x$OPENJDK_$1_OS" = xlinux; then
>
> Is the linux sparc port supposed to work in 9? It apparently does in jdk8, but
> the build later fails with
>
> /<<PKGBUILDDIR>>/src/hotspot/src/os_cpu/linux_sparc/vm/os_linux_sparc.cpp: In
> function 'bool checkByteBuffer(address, address, u_char**)':
> /<<PKGBUILDDIR>>/src/hotspot/src/os_cpu/linux_sparc/vm/os_linux_sparc.cpp:442:49:
> error: 'thread' was not declared in this scope
>       *stub = SharedRuntime::handle_unsafe_access(thread, npc);
>                                                   ^~~~~~
> lib/CompileJvm.gmk:201: recipe for target
> '/<<PKGBUILDDIR>>/build/hotspot/variant-server/libjvm/objs/os_linux_sparc.o' failed
>
>
> Matthias