96d094af13
This makes the generic rules workk happily regardless of whether the linkerscript generation is being used or not. Notably, in the examples repo, use of the linker script autogeneration was retriggering library builds as LIBNAME was unset and therefore the libraries lib<blank>.a couldn't be found.
83 lines
2.9 KiB
Makefile
83 lines
2.9 KiB
Makefile
##
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## This file is part of the libopencm3 project.
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##
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## Copyright (C) 2014 Frantisek Burian <BuFran@seznam.cz>
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##
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## This library is free software: you can redistribute it and/or modify
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## it under the terms of the GNU Lesser General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## This library is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU Lesser General Public License for more details.
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##
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## You should have received a copy of the GNU Lesser General Public License
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## along with this library. If not, see <http://www.gnu.org/licenses/>.
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##
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ifeq ($(DEVICE),)
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$(warning no DEVICE specified for linker script generator)
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endif
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LDSCRIPT = generated.$(DEVICE).ld
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DEVICES_DATA = $(OPENCM3_DIR)/ld/devices.data
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genlink_family :=$(shell $(OPENCM3_DIR)/scripts/genlink.py $(DEVICES_DATA) $(DEVICE) FAMILY)
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genlink_subfamily :=$(shell $(OPENCM3_DIR)/scripts/genlink.py $(DEVICES_DATA) $(DEVICE) SUBFAMILY)
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genlink_cpu :=$(shell $(OPENCM3_DIR)/scripts/genlink.py $(DEVICES_DATA) $(DEVICE) CPU)
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genlink_fpu :=$(shell $(OPENCM3_DIR)/scripts/genlink.py $(DEVICES_DATA) $(DEVICE) FPU)
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genlink_cppflags :=$(shell $(OPENCM3_DIR)/scripts/genlink.py $(DEVICES_DATA) $(DEVICE) CPPFLAGS)
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CPPFLAGS += $(genlink_cppflags)
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ARCH_FLAGS :=-mcpu=$(genlink_cpu)
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ifeq ($(genlink_cpu),$(filter $(genlink_cpu),cortex-m0 cortex-m0plus cortex-m3 cortex-m4 cortex-m7))
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ARCH_FLAGS +=-mthumb
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endif
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ifeq ($(genlink_fpu),soft)
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ARCH_FLAGS += -msoft-float
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else ifeq ($(genlink_fpu),hard-fpv4-sp-d16)
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ARCH_FLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16
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else ifeq ($(genlink_fpu),hard-fpv5-sp-d16)
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ARCH_FLAGS += -mfloat-abi=hard -mfpu=fpv5-sp-d16
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else
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$(warning No match for the FPU flags)
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endif
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ifeq ($(genlink_family),)
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$(warning $(DEVICE) not found in $(DEVICES_DATA))
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endif
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# only append to LDFLAGS if the library file exists to not break builds
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# where those are provided by different means
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ifneq (,$(wildcard $(OPENCM3_DIR)/lib/libopencm3_$(genlink_family).a))
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LIBNAME = opencm3_$(genlink_family)
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else
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ifneq (,$(wildcard $(OPENCM3_DIR)/lib/libopencm3_$(genlink_subfamily).a))
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LIBNAME = opencm3_$(genlink_subfamily)
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else
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$(warning $(OPENCM3_DIR)/lib/libopencm3_$(genlink_family).a library variant for the selected device does not exist.)
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endif
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endif
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LDLIBS += -l$(LIBNAME)
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LIBDEPS += $(OPENCM3_DIR)/lib/lib$(LIBNAME)
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# only append to LDLIBS if the directory exists
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ifneq (,$(wildcard $(OPENCM3_DIR)/lib))
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LDFLAGS += -L$(OPENCM3_DIR)/lib
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else
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$(warning $(OPENCM3_DIR)/lib as given be OPENCM3_DIR does not exist.)
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endif
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# only append include path to CPPFLAGS if the directory exists
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ifneq (,$(wildcard $(OPENCM3_DIR)/include))
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CPPFLAGS += -I$(OPENCM3_DIR)/include
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else
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$(warning $(OPENCM3_DIR)/include as given be OPENCM3_DIR does not exist.)
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endif
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