![Sam Ravnborg](/assets/img/avatar_default.png)
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 $(BITS) um - introduced a few new exported variables to deal with this xtensa - added options to CPP invocation [not build tested] Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
35 lines
1.2 KiB
Makefile
35 lines
1.2 KiB
Makefile
#
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# Makefile for the Linux/Xtensa kernel.
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#
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extra-y := head.o vmlinux.lds
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obj-y := align.o entry.o irq.o coprocessor.o process.o ptrace.o \
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setup.o signal.o syscall.o time.o traps.o vectors.o platform.o \
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pci-dma.o init_task.o io.o
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obj-$(CONFIG_KGDB) += xtensa-stub.o
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obj-$(CONFIG_PCI) += pci.o
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obj-$(CONFIG_MODULES) += xtensa_ksyms.o module.o
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# In the Xtensa architecture, assembly generates literals which must always
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# precede the L32R instruction with a relative offset less than 256 kB.
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# Therefore, the .text and .literal section must be combined in parenthesis
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# in the linker script, such as: *(.literal .text).
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#
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# We need to post-process the generated vmlinux.lds scripts to convert
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# *(xxx.text) to *(xxx.literal xxx.text) for the following text sections:
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# .text .ref.text .*init.text .*exit.text .text.*
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#
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# Replicate rules in scripts/Makefile.build
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sed-y = -e 's/(\(\.[a-z]*it\|\.ref\|\)\.text)/(\1.literal \1.text)/g' \
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-e 's/(\(\.text\.[a-z]*\))/(\1.literal \1)/g'
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quiet_cmd__cpp_lds_S = LDS $@
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cmd__cpp_lds_S = $(CPP) $(cpp_flags) -P -C -Uxtensa -D__ASSEMBLY__ $< \
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| sed $(sed-y) >$@
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$(obj)/vmlinux.lds: $(src)/vmlinux.lds.S FORCE
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$(call if_changed_dep,_cpp_lds_S)
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