With the additon of -pie to build CONFIG_RELOCATABLE
CONFIG_PPC64 kernels, even
if a function is undefined we still get a vmlinux,
System.map, and other files
with no error message.
This is with binutils 2.17 as built by debian
with 2.6.28-rc5, CONFIG_EMBEDDED=y CONFIG_HOTPLUG=n
CONFIG_PCI=y, CONFIG_RELOCATABLE=n
arch/powerpc/kernel/built-in.o: In function
`.pcibios_remove_root_bus':
(.text+0x12dc4): undefined reference to
`.pcibios_unmap_io_space'
make[1]: *** [.tmp_vmlinux1] Error 1
make: *** [sub-make] Error 2
with CONFIG_RELOCATABLE=y
LD init/built-in.o
LD .tmp_vmlinux1
KSYM .tmp_kallsyms1.S
AS .tmp_kallsyms1.o
LD .tmp_vmlinux2
KSYM .tmp_kallsyms2.S
AS .tmp_kallsyms2.o
LD vmlinux
SYSMAP System.map
SYSMAP .tmp_System.map
Note that we set -pie for this combination. I tried adding
seperately both
--no-undefined and --no-allow-shlib-undefined to
LDFLAGS_vmilnux,
but the link still did not error out.
I note that nm -u will detect the U symbol:
$ nm -u /tmp/p-test/vmlinux w mach_cell
w mach_iseries
w mach_powermac
U pcibios_unmap_io_space
but that would either require duplicating cmd_vmlinux and
adding an additonal
check or modifing rule_vmlinux.
milton
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