[google/gcc-4_7-mobile] Backport patch from google/gcc-4_7

Hi Ahmad, I'd like you to do a code review, which backports the
following patch (r190600) from google/gcc-4_7.

2012-08-22  Han Shen  <shenhan@google.com>

	Fixed the problem that LINUX_GRTE_EXTRA_SPECS overrides
	SUBTARGET_EXTRA_SPECS by prepending LINUX_GRTE_EXTRA_SPECS to
	SUBTARGET_EXTRA_SPECS.

	* gcc/config/i386/gnu-user.h (SUBTARGET_EXTRA_SPECS_STR): Add
	new MACRO to hold value of SUBTARET_EXTRA_SPECS so that
	SUBTARET_EXTRA_SPECS could be replaced later in gnu-user.h

	* gcc/config/i386/linux.h (SUBTARGET_EXTRA_SPECS): Compute new value
	of LINUX_GRTE_EXTRA_SPECS by pre-pending LINUX_GRTE_EXTRA_SPECS to its
	origin value.

Patch here -

Property changes on: .

OK for branches/google/gcc-4_7-mobile.

On Thu, Aug 23, 2012 at 3:49 PM, Han Shen(沈涵) <shenhan@google.com> wrote:
> Hi Ahmad, I'd like you to do a code review, which backports the
> following patch (r190600) from google/gcc-4_7.
>
> 2012-08-22  Han Shen  <shenhan@google.com>
>
>         Fixed the problem that LINUX_GRTE_EXTRA_SPECS overrides
>         SUBTARGET_EXTRA_SPECS by prepending LINUX_GRTE_EXTRA_SPECS to
>         SUBTARGET_EXTRA_SPECS.
>
>         * gcc/config/i386/gnu-user.h (SUBTARGET_EXTRA_SPECS_STR): Add
>         new MACRO to hold value of SUBTARET_EXTRA_SPECS so that
>         SUBTARET_EXTRA_SPECS could be replaced later in gnu-user.h
>
>         * gcc/config/i386/linux.h (SUBTARGET_EXTRA_SPECS): Compute new value
>         of LINUX_GRTE_EXTRA_SPECS by pre-pending LINUX_GRTE_EXTRA_SPECS to its
>         origin value.
>
> Patch here -
>
> Property changes on: .
> ___________________________________________________________________
> Modified: svn:mergeinfo
>    Merged /branches/google/gcc-4_7:r190600
>
>
> Property changes on: libjava/classpath
> ___________________________________________________________________
> Modified: svn:mergeinfo
>    Merged /branches/google/gcc-4_7/libjava/classpath:r190600
>
> Index: ChangeLog.google-4_7
> ===================================================================
> --- ChangeLog.google-4_7        (revision 190632)
> +++ ChangeLog.google-4_7        (working copy)
> @@ -1,3 +1,17 @@
> +2012-08-22  Han Shen  <shenhan@google.com>
> +
> +       Fixed the problem that LINUX_GRTE_EXTRA_SPECS overrides
> +       SUBTARGET_EXTRA_SPECS by prepending LINUX_GRTE_EXTRA_SPECS to
> +       SUBTARGET_EXTRA_SPECS.
> +
> +       * gcc/config/i386/gnu-user.h (SUBTARGET_EXTRA_SPECS_STR): Add
> +       new MACRO to hold value of SUBTARET_EXTRA_SPECS so that
> +       SUBTARET_EXTRA_SPECS could be replaced later in gnu-user.h
> +
> +       * gcc/config/i386/linux.h (SUBTARGET_EXTRA_SPECS): Compute new value
> +       of LINUX_GRTE_EXTRA_SPECS by pre-pending LINUX_GRTE_EXTRA_SPECS to its
> +       origin value.
> +
>  2012-08-08  Simon Baldwin  <simonb@google.com>
>
>      Cherry pick revision 190232.
>
> Property changes on: gcc
> ___________________________________________________________________
> Modified: svn:mergeinfo
>    Merged /branches/google/gcc-4_7/gcc:r190600
>
>
> Property changes on: gcc/testsuite/gcc.target/powerpc/ppc-round.c
> ___________________________________________________________________
> Modified: svn:mergeinfo
>    Merged /branches/google/gcc-4_7/gcc/testsuite/gcc.target/powerpc/ppc-round.c:r190600
>
> Index: gcc/config/i386/linux.h
> ===================================================================
> --- gcc/config/i386/linux.h     (revision 190632)
> +++ gcc/config/i386/linux.h     (working copy)
> @@ -32,5 +32,11 @@
>  #endif
>
>  #undef  SUBTARGET_EXTRA_SPECS
> +#ifndef SUBTARGET_EXTRA_SPECS_STR
>  #define SUBTARGET_EXTRA_SPECS \
>    LINUX_GRTE_EXTRA_SPECS
> +#else
> +#define SUBTARGET_EXTRA_SPECS \
> +  LINUX_GRTE_EXTRA_SPECS \
> +  SUBTARGET_EXTRA_SPECS_STR
> +#endif
> Index: gcc/config/i386/gnu-user.h
> ===================================================================
> --- gcc/config/i386/gnu-user.h  (revision 190632)
> +++ gcc/config/i386/gnu-user.h  (working copy)
> @@ -92,11 +92,14 @@
>  #define ASM_SPEC \
>    "--32 %{!mno-sse2avx:%{mavx:-msse2avx}} %{msse2avx:%{!mavx:-msse2avx}}"
>
> -#undef  SUBTARGET_EXTRA_SPECS
> -#define SUBTARGET_EXTRA_SPECS \
> +#undef  SUBTARGET_EXTRA_SPECS_STR
> +#define SUBTARGET_EXTRA_SPECS_STR \
>    { "link_emulation", GNU_USER_LINK_EMULATION },\
>    { "dynamic_linker", GNU_USER_DYNAMIC_LINKER }
>
> +#undef  SUBTARGET_EXTRA_SPECS
> +#define  SUBTARGET_EXTRA_SPECS SUBTARGET_EXTRA_SPECS_STR
> +
>  #undef LINK_SPEC
>  #define LINK_SPEC "-m %(link_emulation) %{shared:-shared} \
>    %{!shared: \
>
>
>
> -Han