arm, cris, mips, sparc, powerpc, um, xtensa: fix build with bash 4.0

Albin Tonnerre <albin.tonnerre@free-electrons.com> reported:

    Bash 4 filters out variables which contain a dot in them.
    This happends to be the case of CPPFLAGS_vmlinux.lds.
    This is rather unfortunate, as it now causes
    build failures when using SHELL=/bin/bash to compile,
    or when bash happens to be used by make (eg when it's /bin/sh)

Remove the common definition of CPPFLAGS_vmlinux.lds by
pushing relevant stuff to either Makefile.build or the
arch specific kernel/Makefile where we build the linker script.

This is also nice cleanup as we move the information out where
it is used.

Notes for the different architectures touched:

arm - we use an already exported symbol
cris - we use a config symbol aleady available
       [Not build tested]
mips - the jiffies complexity has moved to vmlinux.lds.S where we need it.
       Added a few variables to CPPFLAGS - they are only used by
       the linker script.
       [Not build tested]
powerpc - removed assignment that is not needed
          [not build tested]
sparc - simplified it using $(BITS)
um - introduced a few new exported variables to deal with this
xtensa - added options to CPP invocation
         [not build tested]

Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Chris Zankel <chris@zankel.net>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

1 files changed, 11 insertions, 2 deletions

diff --git a/arch/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S
index 2769bed3d2a..9bf0e3df7c5 100644
--- a/arch/mips/kernel/vmlinux.lds.S
+++ b/arch/mips/kernel/vmlinux.lds.S
@@ -10,7 +10,16 @@ PHDRS {
         text PT_LOAD FLAGS(7);  /* RWX */
         note PT_NOTE FLAGS(4);  /* R__ */
 }
-jiffies = JIFFIES;
+
+ifdef CONFIG_32BIT
+        ifdef CONFIG_CPU_LITTLE_ENDIAN
+                jiffies  = jiffies_64;
+        else
+                jiffies  = jiffies_64 + 4;
+        endif
+else
+        jiffies  = jiffies_64;
+endif
 
 SECTIONS
 {
@@ -29,7 +38,7 @@ SECTIONS
         /* . = 0xa800000000300000; */
         . = 0xffffffff80300000;
 #endif
-        . = LOADADDR;
+        . = VMLINUX_LOAD_ADDRESS;
         /* read-only */
         _text = .;      /* Text and read-only data */
         .text : {