mirror of
https://github.com/eledio-devices/thirdparty-littlefs.git
synced 2025-10-31 16:14:16 +01:00
3b495bab79
GCC is a bit frustrating here, it really wants to generate every file in a single command, which _is_ more efficient if our build system could leverage this. But -fcallgraph-info is a rather novel flag, so we can't really rely on it for generally compiling and testing littlefs. The multi-file output gets in the way when we want an explicitly separate rule for callgraph-info generation. We can't generate the callgraph-info without generating the objects files. This becomes a surprsing issue when parallel building (make -j) is used! Suddenly we might end up with both the .o and .ci rules writing to .o files, which creates a really difficult to track down issue of corrupted .o files. The temporary solution is to use an order-only prerequisite. This still ends up building the .o files twice, but it's an acceptable tradeoff for not requiring the -fcallgraph-info for all builds.
173 lines
3.9 KiB
Makefile
173 lines
3.9 KiB
Makefile
ifdef BUILDDIR
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# make sure BUILDDIR ends with a slash
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override BUILDDIR := $(BUILDDIR)/
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# bit of a hack, but we want to make sure BUILDDIR directory structure
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# is correct before any commands
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$(if $(findstring n,$(MAKEFLAGS)),, $(shell mkdir -p \
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$(BUILDDIR) \
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$(BUILDDIR)bd \
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$(BUILDDIR)tests))
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endif
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# overridable target/src/tools/flags/etc
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ifneq ($(wildcard test.c main.c),)
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TARGET ?= $(BUILDDIR)lfs
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else
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TARGET ?= $(BUILDDIR)lfs.a
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endif
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CC ?= gcc
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AR ?= ar
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SIZE ?= size
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CTAGS ?= ctags
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NM ?= nm
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OBJDUMP ?= objdump
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LCOV ?= lcov
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SRC ?= $(wildcard *.c)
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OBJ := $(SRC:%.c=$(BUILDDIR)%.o)
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DEP := $(SRC:%.c=$(BUILDDIR)%.d)
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ASM := $(SRC:%.c=$(BUILDDIR)%.s)
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CGI := $(SRC:%.c=$(BUILDDIR)%.ci)
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ifdef DEBUG
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override CFLAGS += -O0
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else
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override CFLAGS += -Os
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endif
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ifdef TRACE
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override CFLAGS += -DLFS_YES_TRACE
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endif
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override CFLAGS += -g3
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override CFLAGS += -I.
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override CFLAGS += -std=c99 -Wall -pedantic
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override CFLAGS += -Wextra -Wshadow -Wjump-misses-init -Wundef
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ifdef VERBOSE
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override TESTFLAGS += -v
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override CALLSFLAGS += -v
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override CODEFLAGS += -v
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override DATAFLAGS += -v
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override STACKFLAGS += -v
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override STRUCTSFLAGS += -v
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override COVERAGEFLAGS += -v
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endif
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ifdef EXEC
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override TESTFLAGS += --exec="$(EXEC)"
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endif
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ifdef COVERAGE
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override TESTFLAGS += --coverage
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endif
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ifdef BUILDDIR
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override TESTFLAGS += --build-dir="$(BUILDDIR:/=)"
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override CALLSFLAGS += --build-dir="$(BUILDDIR:/=)"
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override CODEFLAGS += --build-dir="$(BUILDDIR:/=)"
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override DATAFLAGS += --build-dir="$(BUILDDIR:/=)"
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override STACKFLAGS += --build-dir="$(BUILDDIR:/=)"
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override STRUCTSFLAGS += --build-dir="$(BUILDDIR:/=)"
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override COVERAGEFLAGS += --build-dir="$(BUILDDIR:/=)"
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endif
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ifneq ($(NM),nm)
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override CODEFLAGS += --nm-tool="$(NM)"
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override DATAFLAGS += --nm-tool="$(NM)"
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endif
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ifneq ($(OBJDUMP),objdump)
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override STRUCTSFLAGS += --objdump-tool="$(OBJDUMP)"
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endif
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# commands
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.PHONY: all build
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all build: $(TARGET)
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.PHONY: asm
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asm: $(ASM)
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.PHONY: size
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size: $(OBJ)
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$(SIZE) -t $^
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.PHONY: tags
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tags:
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$(CTAGS) --totals --c-types=+p $(shell find -H -name '*.h') $(SRC)
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.PHONY: calls
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calls: $(CGI)
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./scripts/calls.py $^ $(CALLSFLAGS)
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.PHONY: test
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test:
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./scripts/test.py $(TESTFLAGS)
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.SECONDEXPANSION:
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test%: tests/test$$(firstword $$(subst \#, ,%)).toml
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./scripts/test.py $@ $(TESTFLAGS)
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.PHONY: code
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code: $(OBJ)
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./scripts/code.py $^ -S $(CODEFLAGS)
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.PHONY: data
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data: $(OBJ)
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./scripts/data.py $^ -S $(DATAFLAGS)
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.PHONY: stack
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stack: $(CGI)
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./scripts/stack.py $^ -S $(STACKFLAGS)
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.PHONY: structs
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structs: $(OBJ)
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./scripts/structs.py $^ -S $(STRUCTSFLAGS)
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.PHONY: coverage
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coverage:
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./scripts/coverage.py $(BUILDDIR)tests/*.toml.info -s $(COVERAGEFLAGS)
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.PHONY: summary
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summary: $(BUILDDIR)lfs.csv
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./scripts/summary.py -Y $^ $(SUMMARYFLAGS)
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# rules
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-include $(DEP)
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.SUFFIXES:
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$(BUILDDIR)lfs: $(OBJ)
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$(CC) $(CFLAGS) $^ $(LFLAGS) -o $@
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$(BUILDDIR)lfs.a: $(OBJ)
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$(AR) rcs $@ $^
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$(BUILDDIR)lfs.csv: $(OBJ) $(CGI)
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./scripts/code.py $(OBJ) -q $(CODEFLAGS) -o $@
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./scripts/data.py $(OBJ) -q -m $@ $(DATAFLAGS) -o $@
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./scripts/stack.py $(CGI) -q -m $@ $(STACKFLAGS) -o $@
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./scripts/structs.py $(OBJ) -q -m $@ $(STRUCTSFLAGS) -o $@
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$(if $(COVERAGE),\
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./scripts/coverage.py $(BUILDDIR)tests/*.toml.info \
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-q -m $@ $(COVERAGEFLAGS) -o $@)
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$(BUILDDIR)%.o: %.c
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$(CC) -c -MMD $(CFLAGS) $< -o $@
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$(BUILDDIR)%.s: %.c
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$(CC) -S $(CFLAGS) $< -o $@
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# gcc depends on the output file for intermediate file names, so
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# we can't omit to .o output. We also need to serialize with the
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# normal .o rule because otherwise we can end up with multiprocess
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# problems with two instances of gcc modifying the same .o
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$(BUILDDIR)%.ci: %.c | $(BUILDDIR)%.o
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$(CC) -c -MMD -fcallgraph-info=su $(CFLAGS) $< -o $|
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# clean everything
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.PHONY: clean
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clean:
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rm -f $(TARGET)
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rm -f $(TARGET).*.csv
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rm -f $(OBJ)
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rm -f $(CGI)
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rm -f $(DEP)
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rm -f $(ASM)
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rm -f $(BUILDDIR)tests/*.toml.*
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