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Added support for USER_LIBS in the command SW makefile. (#551)

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Stephan 2023-03-16 20:47:00 +01:00 • committed by GitHub
commit 9c42cdf11e
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2 changed files with 13 additions and 3 deletions
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4
docs/datasheet/software.adoc
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@ -169,6 +169,7 @@ Make sure to add the bin folder of RISC-V GCC to your PATH variable.
=== Variables ===
USER_FLAGS - Custom toolchain flags [append only], default ""
USER_LIBS - Custom libraries [append only], default ""
EFFORT - Optimization level, default "-Os"
MARCH - Machine architecture, default "rv32i_zicsr"
MABI - Machine binary interface, default "ilp32"
@ -212,6 +213,8 @@ MARCH ?= rv32i_zicsr
MABI ?= ilp32
# User flags for additional configuration (will be added to compiler flags)
USER_FLAGS ?=
# User libraries (will be included by linker)
USER_LIBS ?=
# Relative or absolute path to the NEORV32 home folder
NEORV32_HOME ?= ../../..
# *****************************************************************************
@ -229,6 +232,7 @@ NEORV32_HOME ?= ../../..
| `MARCH` | The targeted RISC-V architecture/ISA
| `MABI` | Application binary interface (default: 32-bit integer ABI `ilp32`)
| `USER_FLAGS` | Additional flags that will be forwarded to the compiler tools
| `USER_LIBS` | Additional libraries to include during linking (`*.a`)
| `NEORV32_HOME` | Relative or absolute path to the NEORV32 project home folder; adapt this if the makefile/project is not in the project's default `sw/example` folder
|=======================

12
sw/common/common.mk
View file

@ -86,7 +86,7 @@ CORE_SRC = $(wildcard $(NEORV32_SRC_PATH)/*.c)
CORE_SRC += $(NEORV32_COM_PATH)/crt0.S
# Linker script
LD_SCRIPT = $(NEORV32_COM_PATH)/neorv32.ld
LD_SCRIPT ?= $(NEORV32_COM_PATH)/neorv32.ld
# Main output files
APP_EXE = neorv32_exe.bin
@ -126,8 +126,10 @@ IMAGE_GEN = $(NEORV32_EXG_PATH)/image_gen
# Compiler & linker flags
CC_OPTS = -march=$(MARCH) -mabi=$(MABI) $(EFFORT) -Wall -ffunction-sections -fdata-sections -nostartfiles -mno-fdiv
CC_OPTS += -Wl,--gc-sections -lm -lc -lgcc -lc -g
CC_OPTS += -g -Wl,--gc-sections
CC_OPTS += $(USER_FLAGS)
LD_LIBS = -lm -lc -lgcc
LD_LIBS += $(USER_LIBS)
# -----------------------------------------------------------------------------
@ -184,7 +186,7 @@ $(IMAGE_GEN): $(NEORV32_EXG_PATH)/image_gen.c
# Link object files and show memory utilization
$(APP_ELF): $(OBJ)
@$(CC) $(CC_OPTS) -T $(LD_SCRIPT) $(OBJ) -o $@ -lm
@$(CC) $(CC_OPTS) -T $(LD_SCRIPT) $(OBJ) $(LD_LIBS) -o $@
@echo "Memory utilization:"
@$(SIZE) $(APP_ELF)
@ -342,6 +344,9 @@ info:
@echo "---------------- Info: Flags ----------------"
@echo "USER_FLAGS: $(USER_FLAGS)"
@echo "CC_OPTS: $(CC_OPTS)"
@echo "---------------- Info: Libraries ----------------"
@echo "USER_LIBS: $(USER_LIBS)"
@echo "LD_LIBS: $(LD_LIBS)"
@echo "---------------- Info: Host Native GCC Flags ----------------"
@echo "CC_X86: $(CC_X86)"
@ -374,6 +379,7 @@ help:
@echo ""
@echo "=== Variables ==="
@echo " USER_FLAGS - Custom toolchain flags [append only]: \"$(USER_FLAGS)\""
@echo " USER_LIBS - Custom libraries [append only]: \"$(USER_LIBS)\""
@echo " EFFORT - Optimization level: \"$(EFFORT)\""
@echo " MARCH - Machine architecture: \"$(MARCH)\""
@echo " MABI - Machine binary interface: \"$(MABI)\""