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https://github.com/zephyrproject-rtos/zephyr
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f25ac092b9
Several Zephyr SDK toolchains support multilibs. Instead of hard-coding locations of the libraries, the proper/cleanest way is to query the GCC compiler for the locations of libgcc and libc. However, in order to do this, we need to ensure a certain order of initialization in the Makefile: 1. Determine CROSS_COMPILE. We cannot determine LIB_INCLUDE_DIR, TOOLCHAIN_CFLAGS yet, as we don't know the KBUILD_CFLAGS yet. 2. Calculate KBUILD_CFLAGS using CROSS_COMPILE KBUILD_CFLAGS often need the compiler to validate options, i.e: KBUILD_CFLAGS += $(call cc-option,-mabi=aapcs -mthumb -mcpu=cortex-m0) However, LIB_INCLUDE_DIR, TOOLCHAIN_CFLAGS should not be needed for this 3. Finally, using CROSS_COMPILE and KBUILD_CFLAGS determine LIB_INCLUDE_DIR, TOOLCHAIN_CFLAGS by querying GCC using -print-libgcc-file-name and -print-multi-directory command line options. This change should only affect Zephyr SDK toolchains, all other toolchains are expected to function as before. Change-Id: I27b460d46fe65d05fcb8bafb51cd6b3deba275ed Signed-off-by: Juro Bystricky <juro.bystricky@intel.com> Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
86 lines
3.1 KiB
Makefile
86 lines
3.1 KiB
Makefile
########################################################################
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#
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# Pass1: Determine CROSS_COMPILE only.
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# We need CROSS_COMPILE in order to validate various KBUILD_CFLAGS
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# GCC CROSS_COMILE is needed in order to validate compiler options
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# via constructs such as:
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# KBUILD_CFLAGS += $(call cc-option,-option,)
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#
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# Pass2: Determine LIB_INCLUDE_DIR and TOOLCHAIN_CFLAGS.
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# Knowing KBUILD_CFLAGS, we can query GCC compiler for the location
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# of the libraries corresponding to the KBUILD_CFLAGS.
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#
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#######################################################################
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ifndef ZEPHYR_SDK_INSTALL_DIR
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$(error ZEPHYR_SDK_INSTALL_DIR is not set)
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endif
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ifeq ($(HOST_OS),MINGW)
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TOOLCHAIN_HOME = ${ZEPHYR_SDK_INSTALL_DIR}/sysroots/i686-pokysdk-mingw32
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else
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TOOLCHAIN_HOME = ${ZEPHYR_SDK_INSTALL_DIR}/sysroots/i686-pokysdk-linux
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endif
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ifndef MAKEFILE_TOOLCHAIN_DO_PASS2
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# arm (pass1)
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CROSS_COMPILE_TARGET_arm = arm-poky-eabi
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SYSROOT_TARGET_arm = armv5-poky-eabi
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CROSS_COMPILE_arm=$(TOOLCHAIN_HOME)/usr/bin/$(CROSS_COMPILE_TARGET_arm)/$(CROSS_COMPILE_TARGET_arm)-
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# arc (pass1)
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CROSS_COMPILE_TARGET_arc = arc-poky-elf
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SYSROOT_TARGET_arc = arc-poky-elf
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CROSS_COMPILE_arc=$(TOOLCHAIN_HOME)/usr/bin/$(CROSS_COMPILE_TARGET_arc)/$(CROSS_COMPILE_TARGET_arc)-
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# iamcu (pass1)
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CROSS_COMPILE_TARGET_iamcu = i586-poky-elfiamcu
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SYSROOT_TARGET_iamcu = iamcu-poky-elfiamcu
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CROSS_COMPILE_iamcu=$(TOOLCHAIN_HOME)/usr/bin/iamcu-poky-elfiamcu/$(CROSS_COMPILE_TARGET_iamcu)-
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# x86 (pass1)
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CROSS_COMPILE_TARGET_x86 = i586-poky-elf
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SYSROOT_TARGET_x86 = i586-poky-elf
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CROSS_COMPILE_x86=$(TOOLCHAIN_HOME)/usr/bin/$(CROSS_COMPILE_TARGET_x86)/$(CROSS_COMPILE_TARGET_x86)-
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# nios2 (pass1)
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CROSS_COMPILE_TARGET_nios2 = nios2-poky-elf
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SYSROOT_TARGET_nios2 = nios2-poky-elf
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CROSS_COMPILE_nios2=$(TOOLCHAIN_HOME)/usr/bin/$(CROSS_COMPILE_TARGET_nios2)/$(CROSS_COMPILE_TARGET_nios2)-
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else
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ifneq ($(CONFIG_TOOLCHAIN_VARIANT),"")
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SYSROOT := ${ZEPHYR_SDK_INSTALL_DIR}/sysroots/${SYSROOT_TARGET_$(subst $\",,${CONFIG_TOOLCHAIN_VARIANT})}
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else
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SYSROOT := ${ZEPHYR_SDK_INSTALL_DIR}/sysroots/${SYSROOT_TARGET_${ARCH}}
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endif
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LIBGCC_DIR = $(shell dirname `$(CROSS_COMPILE)gcc --sysroot=$(SYSROOT) $(KBUILD_CFLAGS) -print-libgcc-file-name`)
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NEWLIB_DIR = $(shell $(CROSS_COMPILE)gcc --sysroot=$(SYSROOT) $(KBUILD_CFLAGS) -print-multi-directory)
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TOOLCHAIN_CFLAGS = -I $(SYSROOT)/usr/include
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LIB_INCLUDE_DIR = -L $(LIBGCC_DIR) -L $(SYSROOT)/usr/lib/$(NEWLIB_DIR)
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endif
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ifneq ($(CONFIG_TOOLCHAIN_VARIANT),"")
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CROSS_COMPILE = $(CROSS_COMPILE_$(subst $\",,$(CONFIG_TOOLCHAIN_VARIANT)))
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else
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CROSS_COMPILE = $(CROSS_COMPILE_$(ARCH))
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endif
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QEMU_BIN_PATH ?= $(TOOLCHAIN_HOME)/usr/bin
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QEMU = $(QEMU_BIN_PATH)/$(QEMU_$(SRCARCH))
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QEMU_BIOS=$(TOOLCHAIN_HOME)/usr/share/qemu
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TOOLCHAIN_LIBS = gcc
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OPENOCD ?= ${ZEPHYR_SDK_INSTALL_DIR}/sysroots/i686-pokysdk-linux/usr/bin/openocd
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OPENOCD_DEFAULT_PATH ?= ${ZEPHYR_SDK_INSTALL_DIR}/sysroots/i686-pokysdk-linux/usr/share/openocd/scripts
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export LIB_INCLUDE_DIR CROSS_COMPILE TOOLCHAIN_LIBS QEMU_BIN_PATH QEMU TOOLCHAIN_CFLAGS OPENOCD OPENOCD_DEFAULT_PATH
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ifndef MAKEFILE_TOOLCHAIN_DO_PASS2
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MAKEFILE_TOOLCHAIN_DO_PASS2=true
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endif
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