setarch − change reported architecture in new program environment and set personality flags
setarch
<arch> [options] [program
[arguments]]
arch [options] [program
[arguments]]
setarch This utility currently only affects the output of uname -m. For example, on an AMD64 system, running ’setarch i386 program’ will cause ’program’ to see i686 (or other relevant arch) instead of x86_64 as machine type. It also allows to set various personality options. The default program is /bin/sh.
−v, −−verbose
Be verbose.
−h, −−help
Display help (it is also displayed when setarch takes no arguments).
−V, −−version
Output version information and exit.
−−uname−2.6
Causes the program to see a kernel version number beginning with 2.6.
−3, −−3gb
Specifies that processes should use a maximum of 3GB of address space on systems where it is supported (ADDR_LIMIT_3GB).
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−−4gb |
Ignored (for backward compatibility only). |
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−−list |
List architectures that can be set. |
−B, −−32bit
Turns on ADDR_LIMIT_32BIT.
−F, −−fdpic−funcptrs
Userspace function pointers point to descriptors (turns on FDPIC_FUNCPTRS).
−I, −−short−inode
Turns on SHORT_INODE.
−L, −−addr−compat−layout
Changes the way virtual memory is allocated (turns on the ADDR_COMPAT_LAYOUT).
−R, −−addr−no−randomize
Disables randomization of the virtual address space (turns on ADDR_NO_RANDOMIZE).
−S, −−whole−seconds
Turns on WHOLE_SECONDS.
−T, −−sticky−timeouts
Turns on STICKY_TIMEOUTS.
−X, −−read−implies−exec
Turns on READ_IMPLIES_EXEC.
−Z, −−mmap−page−zero
Turns on MMAP_PAGE_ZERO.
setarch ppc32
rpmbuild --target=ppc --rebuild foo.src.rpm
setarch ppc32 -v -vL3 rpmbuild --target=ppc --rebuild
bar.src.rpm
setarch ppc32 --32bit rpmbuild --target=ppc --rebuild
foo.src.rpm
The setarch command is part of the util-linux package and is available from Linux Kernel Archive.