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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 | # # Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License version 2 as # published by the Free Software Foundation. # UTS_MACHINE := arc ifeq ($(CROSS_COMPILE),) ifndef CONFIG_CPU_BIG_ENDIAN CROSS_COMPILE := arc-linux- else CROSS_COMPILE := arceb-linux- endif endif KBUILD_DEFCONFIG := nsim_700_defconfig cflags-y += -fno-common -pipe -fno-builtin -D__linux__ cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7 cflags-$(CONFIG_ISA_ARCV2) += -mcpu=archs is_700 = $(shell $(CC) -dM -E - < /dev/null | grep -q "ARC700" && echo 1 || echo 0) ifdef CONFIG_ISA_ARCOMPACT ifeq ($(is_700), 0) $(error Toolchain not configured for ARCompact builds) endif endif ifdef CONFIG_ISA_ARCV2 ifeq ($(is_700), 1) $(error Toolchain not configured for ARCv2 builds) endif endif ifdef CONFIG_ARC_CURR_IN_REG # For a global register defintion, make sure it gets passed to every file # We had a customer reported bug where some code built in kernel was NOT using # any kernel headers, and missing the r25 global register # Can't do unconditionally because of recursive include issues # due to <linux/thread_info.h> LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h endif upto_gcc44 := $(call cc-ifversion, -le, 0404, y) atleast_gcc44 := $(call cc-ifversion, -ge, 0404, y) cflags-$(atleast_gcc44) += -fsection-anchors cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape ifdef CONFIG_ISA_ARCV2 ifndef CONFIG_ARC_HAS_LL64 cflags-y += -mno-ll64 endif ifndef CONFIG_ARC_HAS_DIV_REM cflags-y += -mno-div-rem endif endif cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI) cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables $(cfi) ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE # Generic build system uses -O2, we want -O3 # Note: No need to add to cflags-y as that happens anyways # # Disable the false maybe-uninitialized warings gcc spits out at -O3 ARCH_CFLAGS += -O3 $(call cc-disable-warning,maybe-uninitialized,) endif # small data is default for elf32 tool-chain. If not usable, disable it # This also allows repurposing GP as scratch reg to gcc reg allocator disable_small_data := y cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB # STAR 9000518362: (fixed with binutils shipping with gcc 4.8) # arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept # --build-id w/o "-marclinux". Default arc-elf32-ld is OK ldflags-$(upto_gcc44) += -marclinux LIBGCC := $(shell $(CC) $(cflags-y) --print-libgcc-file-name) # Modules with short calls might break for calls into builtin-kernel KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode # Finally dump eveything into kernel build system KBUILD_CFLAGS += $(cflags-y) KBUILD_AFLAGS += $(KBUILD_CFLAGS) LDFLAGS += $(ldflags-y) head-y := arch/arc/kernel/head.o # See arch/arc/Kbuild for content of core part of the kernel core-y += arch/arc/ # w/o this dtb won't embed into kernel binary core-y += arch/arc/boot/dts/ core-$(CONFIG_ARC_PLAT_SIM) += arch/arc/plat-sim/ core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/ core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/ core-$(CONFIG_ARC_PLAT_EZNPS) += arch/arc/plat-eznps/ ifdef CONFIG_ARC_PLAT_EZNPS KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include endif drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/ libs-y += arch/arc/lib/ $(LIBGCC) boot := arch/arc/boot #default target for make without any arguments. KBUILD_IMAGE := bootpImage all: $(KBUILD_IMAGE) bootpImage: vmlinux boot_targets += uImage uImage.bin uImage.gz $(boot_targets): vmlinux $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ %.dtb %.dtb.S %.dtb.o: scripts $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ dtbs: scripts $(Q)$(MAKE) $(build)=$(boot)/dts archclean: $(Q)$(MAKE) $(clean)=$(boot) # Hacks to enable final link due to absence of link-time branch relexation # and gcc choosing optimal(shorter) branches at -O3 # # vineetg Feb 2010: -mlong-calls switched off for overall kernel build # However lib/decompress_inflate.o (.init.text) calls # zlib_inflate_workspacesize (.text) causing relocation errors. # Thus forcing all exten calls in this file to be long calls export CFLAGS_decompress_inflate.o = -mmedium-calls export CFLAGS_initramfs.o = -mmedium-calls ifdef CONFIG_SMP export CFLAGS_core.o = -mmedium-calls endif |