These patches make the omni twrp-5.1 sources (2015-era) build on a modern host toolchain. They are applied automatically by build_twrp.sh and are idempotent (already-applied patches are detected and skipped).

Patch	File(s)	Problem fixed
`0001-host-cflags-suppress-stringop-truncation.patch`	`build/core/combo/HOST_linux-x86*.mk`	`-Werror=stringop-truncation` errors with host GCC >= 8
`0002-build-core-fix-ar-absolute-paths.patch`	`build/core/definitions.mk`	host `ar`/absolute path handling in whole-archive extraction breaks with newer binutils; extract to a temp dir instead
`0003-kernel-add-missing-ARCH_MSM-config-and-defconfig-fixes.patch`	`kernel/.../arch/arm/mach-msm/Kconfig`, `msm8926-sec_rubenslte_defconfig`	adds the missing `ARCH_MSM` Kconfig entry and enables `CONFIG_OF`/`ARCH_MSM` in the variant defconfig (fresh kernel tree lacks them)
`0004-recovery-add-std-gnu++11-for-nullptr-support.patch`	`bootable/recovery/Android.mk`	adds `-std=gnu++11` for `nullptr` under the recovery Clang build
`0005-build-core-combo-remove-icf-safe-for-BFD-ld.patch`	`build/core/combo/TARGET_linux-arm.mk`	`-Wl,--icf=safe` is gold-only; commented out for the BFD linker supplied by the toolchain download
`0006-kernel-timeconst-pl-fix-deprecated-defined-array.patch`	`kernel/.../kernel/timeconst.pl`	`defined(@array)` removed in Perl 5.22+; use `!@val`
`0007-scripts-Makefile-modpost-treat-section-mismatches-as-non-fatal.patch`	`kernel/.../scripts/Makefile.modpost`	drops the `-E` flag so section mismatches are warnings, not errors (newer host binutils)
`0008-build-core-tasks-kernel-fix-KERNEL_CONFIG_OVERRIDE-ordering-and-passthrough.patch`	`build/core/tasks/kernel.mk`	applies the additional config before the override, drops the clobbering `oldconfig` after override, and passes the override on the kernel build command line

The kernel patches (0003, 0006, 0007) target kernel/samsung/rubenslte as checked out by build_twrp.sh; the others target the omni twrp-5.1 manifest sources — they only apply in the repo workspace, not on a host.