arch/hexagon/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 #  Makefile for the Hexagon arch
   3
   4 KBUILD_DEFCONFIG = comet_defconfig
   5
   6 # Do not use GP-relative jumps
   7 KBUILD_CFLAGS += -G0
   8 LDFLAGS_vmlinux += -G0
   9
  10 # Do not use single-byte enums; these will overflow.
  11 KBUILD_CFLAGS += -fno-short-enums
  12
  13 # We must use long-calls:
  14 KBUILD_CFLAGS += -mlong-calls
  15
  16 # Modules must use either long-calls, or use pic/plt.
  17 # Use long-calls for now, it's easier.  And faster.
  18 # KBUILD_CFLAGS_MODULE += -fPIC
  19 # KBUILD_LDFLAGS_MODULE += -shared
  20 KBUILD_CFLAGS_MODULE += -mlong-calls
  21
  22 cflags-y += $(call cc-option,-mv${CONFIG_HEXAGON_ARCH_VERSION})
  23 aflags-y += $(call cc-option,-mv${CONFIG_HEXAGON_ARCH_VERSION})
  24 ldflags-y += $(call cc-option,-mv${CONFIG_HEXAGON_ARCH_VERSION})
  25
  26 KBUILD_CFLAGS += $(cflags-y)
  27 KBUILD_AFLAGS += $(aflags-y)
  28 KBUILD_LDFLAGS += $(ldflags-y)
  29
  30 # Thread-info register will be r19.  This value is not configureable;
  31 # it is hard-coded in several files.
  32 TIR_NAME := r19
  33 KBUILD_CFLAGS += -ffixed-$(TIR_NAME) -DTHREADINFO_REG=$(TIR_NAME) -D__linux__
  34 KBUILD_AFLAGS += -DTHREADINFO_REG=$(TIR_NAME)
  35
  36 # Disable HexagonConstExtenders pass for LLVM versions prior to 19.1.0
  37 # https://github.com/llvm/llvm-project/issues/99714
  38 ifneq ($(call clang-min-version, 190100),y)
  39 KBUILD_CFLAGS += -mllvm -hexagon-cext=false
  40 endif