Build Linux Perf for MIPS

The perf tool has been tested with ingenic T40.

Make toolchain

configs/ingenic_t40_defconfig

# Target options
BR2_mipsel=y
BR2_mips_xburst=y
# BR2_MIPS_SOFT_FLOAT is not set
BR2_MIPS_FP32_MODE_64=y

# Build options
BR2_SHARED_STATIC_LIBS=y

# Security Hardening
BR2_PIC_PIE=y
BR2_SSP_STRONG=y
BR2_RELRO_FULL=y
BR2_FORTIFY_SOURCE_1=y

#
# Toolchain
#
BR2_TOOLCHAIN=y
BR2_TOOLCHAIN_USES_GLIBC=y

# Toolchain Buildroot Options
BR2_TOOLCHAIN_BUILDROOT_VENDOR="buildroot"
BR2_TOOLCHAIN_BUILDROOT_GLIBC=y

BR2_KERNEL_HEADERS_5_15=y
BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
BR2_TOOLCHAIN_BUILDROOT_USE_SSP=y

# Glibc Options
BR2_PACKAGE_GLIBC_KERNEL_COMPAT=y

# GCC Options
BR2_GCC_VERSION_10_X=y
BR2_TOOLCHAIN_BUILDROOT_CXX=y

#
# Host GDB Options
#
BR2_PACKAGE_HOST_GDB=y
BR2_PACKAGE_HOST_GDB_TUI=y
BR2_PACKAGE_HOST_GDB_PYTHON3=y

# Toolchain Buildroot Options

BR2_INIT_NONE=y
# BR2_PACKAGE_BUSYBOX is not set
BR2_PACKAGE_BINUTILS=y
BR2_PACKAGE_ELFUTILS=y
BR2_PACKAGE_LIBUNWIND=y
BR2_PACKAGE_POPT=y

make ingenic_t40_defconfig && make sdk

Build perf

cd linux-6.1.68/tools/perf

export MIPSEL_SYSROOT=/usr/local/mips/mipsel-buildroot-linux-gnu/mipsel-buildroot-linux-gnu/sysroot
make ARCH=mips CROSS_COMPILE=mipsel-linux- CFLAGS="--sysroot=${MIPSEL_SYSROOT}"
[...]
Auto-detecting system features:
...                                   dwarf: [ on  ]
...                      dwarf_getlocations: [ on  ]
...                                   glibc: [ on  ]
...                                  libbfd: [ on  ]
...                          libbfd-buildid: [ on  ]
...                                  libcap: [ OFF ]
...                                  libelf: [ on  ]
...                                 libnuma: [ OFF ]
...                  numa_num_possible_cpus: [ OFF ]
...                                 libperl: [ OFF ]
...                               libpython: [ OFF ]
...                               libcrypto: [ OFF ]
...                               libunwind: [ on  ]
...                      libdw-dwarf-unwind: [ on  ]
...                                    zlib: [ on  ]
...                                    lzma: [ OFF ]
...                               get_cpuid: [ OFF ]
...                                     bpf: [ on  ]
...                                  libaio: [ on  ]
...                                 libzstd: [ OFF ]

file perf
perf: ELF 32-bit LSB executable, MIPS, MIPS32 rel2 version 1 (SYSV), dynamically linked, interpreter /lib/ld.so.1, for GNU/Linux 3.2.0, with debug_info, not stripped