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https://github.com/RIOT-OS/RIOT.git
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c1ad435668
If external modules use C++ code and forget to require the `cpp` feature, linking will still take places using $(CC). This commit adds a check if C++ code was detected without the feature `cpp` being used, now the build is aborted with a helpful error message rather than a linker error.
140 lines
4.2 KiB
Makefile
140 lines
4.2 KiB
Makefile
ifeq (, $(__RIOTBUILD_FLAG))
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$(error You cannot build a module on its own. Use "make" in your application's directory instead.)
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endif
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#
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# enable second expansion of prerequisites.
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#
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# Doing that here enables it globally for all modules and the application.
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#
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# See https://www.gnu.org/software/make/manual/html_node/Secondary-Expansion.html
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# for what it can be used for.
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.SECONDEXPANSION:
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unexport DIRS
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DIRS := $(sort $(abspath $(DIRS)))
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_MOD := $(shell basename $(CURDIR))
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MODULE ?= $(_MOD)
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.PHONY: all clean $(DIRS:%=ALL--%) $(DIRS:%=CLEAN--%)
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all: $(BINDIR)/$(MODULE).a ..nothing
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..nothing:
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@:
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clean:: $(DIRS:%=CLEAN--%)
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$(DIRS:%=ALL--%):
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$(QQ)"$(MAKE)" -C $(@:ALL--%=%)
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$(DIRS:%=CLEAN--%):
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$(QQ)"$(MAKE)" -C $(@:CLEAN--%=%) clean
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## submodules
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ifeq (1, $(SUBMODULES))
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# don't use *.c as SRC if SRC is empty (e.g., no module selected)
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NO_AUTO_SRC := 1
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# allow different submodule basename (e.g., MODULE=cpu_periph_common, but match just periph_%)
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BASE_MODULE ?= $(MODULE)
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# for each $(BASE_MODULE)_<name> in USEMODULE, add <name>.c to SRC
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SRC += $(wildcard $(patsubst $(BASE_MODULE)_%,%.c,$(filter $(BASE_MODULE)_%,$(USEMODULE))))
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# remove duplicates
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SRC := $(sort $(SRC))
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endif
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# By default consider C++ files has a .cpp extension
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SRCXXEXT ?= cpp
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ifeq ($(strip $(SRC))$(NO_AUTO_SRC),)
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SRC := $(filter-out $(SRC_NOLTO), $(wildcard *.c))
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endif
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ifeq ($(strip $(SRCXX))$(NO_AUTO_SRC),)
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SRCXX := $(filter-out $(SRCXXEXCLUDE),$(wildcard *.$(SRCXXEXT)))
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endif
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ifeq ($(strip $(ASMSRC))$(NO_AUTO_SRC),)
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ASMSRC := $(wildcard *.s)
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endif
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ifeq ($(strip $(ASSMSRC))$(NO_AUTO_SRC),)
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ASSMSRC := $(wildcard *.S)
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endif
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ifneq (,$(SRCXX))
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ifeq (,$(filter cpp,$(FEATURES_USED)))
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$(error Found C++ source, but feature "cpp" is not used. Add "FEATURES_REQUIRED += cpp")
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endif
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endif
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# include makefile snippets for packages in $(USEPKG) that modify GENSRC:
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-include $(USEPKG:%=$(RIOTPKG)/%/Makefile.gensrc)
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GENOBJC := $(GENSRC:%.c=%.o)
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OBJC_LTO := $(SRC:%.c=$(BINDIR)/$(MODULE)/%.o)
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OBJC_NOLTO := $(SRC_NOLTO:%.c=$(BINDIR)/$(MODULE)/%.o)
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OBJC := $(OBJC_NOLTO) $(OBJC_LTO)
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OBJCXX := $(SRCXX:%.$(SRCXXEXT)=$(BINDIR)/$(MODULE)/%.o)
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ASMOBJ := $(ASMSRC:%.s=$(BINDIR)/$(MODULE)/%.o)
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ASSMOBJ := $(ASSMSRC:%.S=$(BINDIR)/$(MODULE)/%.o)
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OBJ := $(OBJC) $(OBJCXX) $(ASMOBJ) $(ASSMOBJ) $(GENOBJC)
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DEP := $(OBJC:.o=.d) $(OBJCXX:.o=.d) $(ASSMOBJ:.o=.d)
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include $(RIOTMAKE)/blob.inc.mk
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$(BINDIR)/$(MODULE)/:
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$(Q)mkdir -p $@
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$(BINDIR)/$(MODULE).a $(OBJ): | $(BINDIR)/$(MODULE)/
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# Build the archive from the output directory to create relative thin archives
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# This allows having them valid in and outside of docker
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$(BINDIR)/$(MODULE).a: $(OBJ) | $(DIRS:%=ALL--%)
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@# Recreate archive to cleanup deleted/non selected source files objects
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$(Q)$(RM) $@
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$(Q)cd $(@D) && $(AR) $(ARFLAGS) $(@F) $(subst $(@D)/,,$^)
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CXXFLAGS = $(filter-out $(CXXUWFLAGS), $(CFLAGS)) $(CXXEXFLAGS)
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CCASFLAGS = $(filter-out $(CCASUWFLAGS), $(CFLAGS)) $(CCASEXFLAGS)
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# compile and generate dependency info
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$(OBJC_LTO): CFLAGS+=$(LTOFLAGS)
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# Define dependencies for object files
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OBJ_DEPS += $(RIOTBUILD_CONFIG_HEADER_C)
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ifneq (,$(SHOULD_RUN_KCONFIG))
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OBJ_DEPS += $(KCONFIG_GENERATED_AUTOCONF_HEADER_C)
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endif
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$(OBJC): $(BINDIR)/$(MODULE)/%.o: %.c $(OBJ_DEPS)
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$(Q)$(CCACHE) $(CC) \
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-DRIOT_FILE_RELATIVE=\"$(patsubst $(RIOTBASE)/%,%,$(abspath $<))\" \
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-DRIOT_FILE_NOPATH=\"$(notdir $<)\" \
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$(CFLAGS) $(INCLUDES) -MQ '$@' -MD -MP -c -o $@ $(abspath $<)
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$(GENOBJC): %.o: %.c $(OBJ_DEPS)
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$(Q) $(CCACHE) $(CC) \
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-DRIOT_FILE_RELATIVE=\"$(patsubst $(RIOTBASE)/%,%,$<)\" \
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-DRIOT_FILE_NOPATH=\"$(notdir $<)\" \
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$(CFLAGS) $(INCLUDES) -MQ '$@' -MD -MP -c -o $@ $<
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$(OBJCXX): $(BINDIR)/$(MODULE)/%.o: %.$(SRCXXEXT) $(OBJ_DEPS)
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$(Q)$(CCACHE) $(CXX) \
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-DRIOT_FILE_RELATIVE=\"$(patsubst $(RIOTBASE)/%,%,$(abspath $<))\" \
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-DRIOT_FILE_NOPATH=\"$(notdir $<)\" \
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$(CXXFLAGS) $(CXXINCLUDES) $(INCLUDES) -MQ '$@' -MD -MP -c -o $@ $(abspath $<)
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$(ASMOBJ): $(BINDIR)/$(MODULE)/%.o: %.s
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$(Q)$(AS) $(ASFLAGS) -o $@ $(abspath $<)
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$(ASSMOBJ): $(BINDIR)/$(MODULE)/%.o: %.S $(OBJ_DEPS)
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$(Q)$(CCAS) $(CCASFLAGS) $(INCLUDES) -MQ '$@' -MD -MP -c -o $@ $(abspath $<)
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# pull in dependency info for *existing* .o files
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# deleted header files will be silently ignored
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-include $(DEP)
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