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  • Sam Ravnborg's avatar
    arm, cris, mips, sparc, powerpc, um, xtensa: fix build with bash 4.0 · 51b563fc
    Sam Ravnborg authored
    
    
    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: default avatarSam Ravnborg <sam@ravnborg.org>
    51b563fc