CONFIG_MIPS_O32_FP64_SUPPORT is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
Support for O32 binaries using 64-bit FP
configname: CONFIG_MIPS_O32_FP64_SUPPORT
Linux Kernel Configuration
└─>Kernel type
└─>Support for O32 binaries using 64-bit FP
In linux kernel since version 3.10 (release Date: 2013-06-30)
When this is enabled, the kernel will support use of 64-bit floating
point registers with binaries using the O32 ABI along with the
EF_MIPS_FP64 ELF header flag (typically built with -mfp64). On
32-bit MIPS systems this support is at the cost of increasing the
size and complexity of the compiled FPU emulator. Thus if you are
running a MIPS32 system and know that none of your userland binaries
will require 64-bit floating point, you may wish to reduce the size
of your kernel & potentially improve FP emulation performance by
saying N here.
Although binutils currently supports use of this flag the details
concerning its effect upon the O32 ABI in userland are still being
worked on. In order to avoid userland becoming dependant upon current
behaviour before the details have been finalised, this option should
be considered experimental and only enabled by those working upon
said details.
If unsure, say N.
point registers with binaries using the O32 ABI along with the
EF_MIPS_FP64 ELF header flag (typically built with -mfp64). On
32-bit MIPS systems this support is at the cost of increasing the
size and complexity of the compiled FPU emulator. Thus if you are
running a MIPS32 system and know that none of your userland binaries
will require 64-bit floating point, you may wish to reduce the size
of your kernel & potentially improve FP emulation performance by
saying N here.
Although binutils currently supports use of this flag the details
concerning its effect upon the O32 ABI in userland are still being
worked on. In order to avoid userland becoming dependant upon current
behaviour before the details have been finalised, this option should
be considered experimental and only enabled by those working upon
said details.
If unsure, say N.