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build.mk
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# We prefer C99 with GNU extensions
DEFAULT_WARNFLAGS ?= -Wall -Wextra -std=gnu99 -Wimplicit \
-Wshadow -Wswitch-default -Wswitch-enum -Wundef \
-Wuninitialized -Wpointer-arith -Wstrict-prototypes \
-Wmissing-prototypes -Wcast-align -Wformat=2 \
-Wimplicit-function-declaration -Wredundant-decls \
-Wformat-security
# And for C++:
# http://stackoverflow.com/questions/399850/best-compiler-warning-level-for-c-c-compilers
ifdef CLANGIN
DEFAULT_CXXWARNFLAGS ?= -Wall -Weffc++ -std=gnu++11 \
-Wextra -Waggregate-return -Wcast-align \
-Wcast-qual -Wchar-subscripts -Wcomment -Wconversion \
-Wdisabled-optimization -Wfloat-equal -Wformat -Wformat=2 \
-Wformat-nonliteral -Wformat-security -Wformat-y2k \
-Wimport -Winit-self -Winline -Winvalid-pch \
-Wlong-long -Wmissing-braces \
-Wmissing-field-initializers -Wmissing-format-attribute \
-Wmissing-include-dirs -Wmissing-noreturn \
-Wpacked -Wpadded -Wparentheses -Wpointer-arith \
-Wredundant-decls -Wreturn-type \
-Wsequence-point -Wshadow -Wsign-compare -Wstack-protector \
-Wstrict-aliasing -Wstrict-aliasing=2 -Wswitch -Wswitch-default \
-Wswitch-enum -Wtrigraphs -Wuninitialized \
-Wunknown-pragmas -Wunreachable-code -Wunused \
-Wunused-function -Wunused-label -Wunused-parameter \
-Wunused-value -Wunused-variable -Wvariadic-macros \
-Wvolatile-register-var -Wwrite-strings
else
DEFAULT_CXXWARNFLAGS ?= -Wall -Weffc++ -std=gnu++11 \
-Wextra -Waggregate-return -Wcast-align \
-Wcast-qual -Wchar-subscripts -Wcomment -Wconversion \
-Wdisabled-optimization -Wfloat-equal -Wformat -Wformat=2 \
-Wformat-nonliteral -Wformat-security -Wformat-y2k \
-Wimport -Winit-self -Winline -Winvalid-pch \
-Wunsafe-loop-optimizations -Wlong-long -Wmissing-braces \
-Wmissing-field-initializers -Wmissing-format-attribute \
-Wmissing-include-dirs -Wmissing-noreturn \
-Wpacked -Wpadded -Wparentheses -Wpointer-arith \
-Wredundant-decls -Wreturn-type \
-Wsequence-point -Wshadow -Wsign-compare -Wstack-protector \
-Wstrict-aliasing -Wstrict-aliasing=2 -Wswitch -Wswitch-default \
-Wswitch-enum -Wtrigraphs -Wuninitialized \
-Wunknown-pragmas -Wunreachable-code -Wunused \
-Wunused-function -Wunused-label -Wunused-parameter \
-Wunused-value -Wunused-variable -Wvariadic-macros \
-Wvolatile-register-var -Wwrite-strings
endif
ifndef NO_WERROR
WARNFLAGS ?= $(DEFAULT_WARNFLAGS) -Werror
CXXWARNFLAGS ?= $(DEFAULT_CXXWARNFLAGS) -Werror
else
WARNFLAGS ?= $(DEFAULT_WARNFLAGS)
CXXWARNFLAGS ?= $(DEFAULT_CXXWARNFLAGS)
endif
INCLUDES = $(INCLUDENAMES:%=-I%) $(OTHERINCLUDE)
LIBS = $(LIBNAMES:%=-l%) $(LIBDIRS:%=-L%) $(OTHERLIB)
# Collect all our flags for the compiler to use
CFLAGS = $(WARNFLAGS) $(OPTFLAGS) $(SECFLAGS) $(INCLUDES) $(DBGFLAGS) $(DEPFLAGS) $(USERFLAGS) $(USERCFLAGS)
CXXFLAGS = $(CXXWARNFLAGS) $(OPTFLAGS) $(SECFLAGS) $(INCLUDES) $(DBGFLAGS) $(DEPFLAGS) $(USERFLAGS) $(USERCXXFLAGS)
LDFLAGS = $(LDWARNFLAGS) $(LDOPTFLAGS) $(LDSECFLAGS) $(LIBS) $(LDDBGFLAGS) $(USERFLAGS) $(USERLDFLAGS)
LDOUTPUTFLAGS ?= -Wl,--cref -Wl,-Map=
.PHONY: all
all: $(PROJ)
# Build the project
.SECONDEXPANSION:
$(PROJ): % : $$(findstring $$(*:%=%.$(OBJECT_FILE_SUFFIX)),$(OBJ)) $(filter-out $(PROJ:%=%.$(OBJECT_FILE_SUFFIX)),$(OBJ))
@echo LD $@
ifneq (,$(CXX_SRC))
$(Q)$(CXX) $(filter %.$(OBJECT_FILE_SUFFIX) %.a %.so, $^) $(LDFLAGS) $(LDOUTPUTFLAGS)$(@).map -o $@
else
$(Q)$(CC) $(filter %.$(OBJECT_FILE_SUFFIX) %.a %.so, $^) $(LDFLAGS) $(LDOUTPUTFLAGS)$(@).map -o $@
endif
.SECONDEXPANSION:
$(AVRPROJ): %.elf : $$(findstring $$(*:%=%.$(OBJECT_FILE_SUFFIX)),$(OBJ)) $(filter-out $(PROJ:%=%.$(OBJECT_FILE_SUFFIX)),$(OBJ))
@echo LD $@
ifneq (,$(CXX_SRC))
$(Q)$(CXX) $(filter %.$(OBJECT_FILE_SUFFIX) %.a %.so, $^) $(LDFLAGS) -o $@
else
$(Q)$(CC) $(filter %.$(OBJECT_FILE_SUFFIX) %.a %.so, $^) $(LDFLAGS) -o $@
endif
.SECONDEXPANSION:
$(CM4_PROJ): %.elf : $$(findstring $$(*:%=%.$(OBJECT_FILE_SUFFIX)),$(OBJ)) $(filter-out $(PROJ:%=%.$(OBJECT_FILE_SUFFIX)),$(OBJ))
@echo LD $@
ifneq (,$(CXX_SRC))
$(Q)$(CXX) $(filter %.$(OBJECT_FILE_SUFFIX) %.a %.so, $^) $(LDFLAGS) -o $@
else
$(Q)$(CC) $(filter %.$(OBJECT_FILE_SUFFIX) %.a %.so, $^) $(LDFLAGS) -o $@
endif
# Generate object files; output assembly listings alongside. esden
# tells me that it's hard to get a real GCC on OS X, so avoid the
# worst of the non-portability.
$(CUSTOM_C_OBJ) : %.$(OBJECT_FILE_SUFFIX) : %.c
@echo CC \(CUSTOM\) $(notdir $<)
ifndef NO_DEPS
$(Q)$(CC) -MM -MT $@ -MT $(basename $(basename $@)).d $(CUSTOM_CFLAGS) $< -MF $(basename $(basename $@)).d
endif
ifdef CLANGIN
$(Q)$(CC) $(CUSTOM_CFLAGS) -c $< -o $@
else
$(Q)$(CC) $(CUSTOM_CFLAGS) $(ASMFLAGS)$(@:%.$(OBJECT_FILE_SUFFIX)=%.$(ASMNAME)) -c $< -o $@
endif
$(filter-out $(CUSTOM_C_OBJ), $(C_OBJ)) : %.$(OBJECT_FILE_SUFFIX) : %.c # $(C_HDR)
@echo CC $(notdir $<)
ifndef NO_DEPS
$(Q)$(CC) -MM -MT $@ -MT $(basename $(basename $@)).d $(CFLAGS) $< -MF $(basename $(basename $@)).d
endif
ifdef CLANGIN
$(Q)$(CC) $(CFLAGS) -c $< -o $@
else
$(Q)$(CC) $(CFLAGS) $(ASMFLAGS)$(@:%.$(OBJECT_FILE_SUFFIX)=%.$(ASMNAME)) -c $< -o $@
endif
$(CUSTOM_CXX_OBJ) : %.$(OBJECT_FILE_SUFFIX) : %.$(CXX_EXT)
@echo CXX \(CUSTOM\) $(notdir $<)
ifndef NO_DEPS
$(Q)$(CXX) -MM -MT $@ -MT $(basename $(basename $@)).d $(CUSTOM_CXXFLAGS) $< -MF $(basename $(basename $@)).d
endif
ifdef CLANGIN
$(Q)$(CXX) $(CUSTOM_CXXFLAGS) -c $< -o $@
else
$(Q)$(CXX) $(CUSTOM_CXXFLAGS) $(ASMFLAGS)$(@:%.$(OBJECT_FILE_SUFFIX)=%.$(ASMNAME)) -c $< -o $@
endif
$(filter-out $(CUSTOM_CXX_OBJ), $(CXX_OBJ)) : %.$(OBJECT_FILE_SUFFIX) : %.$(CXX_EXT) # $(CXX_HDR)
@echo CXX $(notdir $<)
ifndef NO_DEPS
$(Q)$(CXX) -MM -MT $@ -MT $(basename $(basename $@)).d $(CXXFLAGS) $< -MF $(basename $(basename $@)).d
endif
ifdef CLANGIN
$(Q)$(CXX) $(CXXFLAGS) -c $< -o $@
else
$(Q)$(CXX) $(CXXFLAGS) $(ASMFLAGS)$(@:%.$(OBJECT_FILE_SUFFIX)=%.$(ASMNAME)) -c $< -o $@
endif
ifndef NO_DEPS
-include $(DEPS)
else
$(OBJ) : $(HDR)
endif