814a73227f
This is useful when you do: foo_SOURCES := $(wildcard *.cc) foo.cc where foo.cc is a generated file. In this case, if foo.cc already exists, you get foo.cc twice in foo_SOURCES, leading to a link error.
63 lines
2 KiB
Makefile
63 lines
2 KiB
Makefile
programs_list :=
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# Build a program with symbolic name $(1). The program is defined by
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# various variables prefixed by ‘$(1)_’:
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#
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# - $(1)_DIR: the directory where the (non-installed) program will be
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# placed.
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#
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# - $(1)_SOURCES: the source files of the program.
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#
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# - $(1)_LIBS: the symbolic names of libraries on which this program
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# depends.
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#
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# - $(1)_LDFLAGS: additional linker flags.
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#
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# - $(1)_INSTALL_DIR: the directory where the program will be
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# installed; defaults to $(bindir).
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define build-program =
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_d := $$($(1)_DIR)
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_srcs := $$(sort $$(foreach src, $$($(1)_SOURCES), $$(src)))
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$(1)_OBJS := $$(addsuffix .o, $$(basename $$(_srcs)))
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_libs := $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_PATH))
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$(1)_PATH := $$(_d)/$(1)
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$$($(1)_PATH): $$($(1)_OBJS) $$(_libs)
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$(QUIET) $(CXX) -o $$@ $(GLOBAL_LDFLAGS) $$($(1)_OBJS) $$($(1)_LDFLAGS) $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_LDFLAGS_USE))
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$(1)_INSTALL_DIR ?= $$(bindir)
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$(1)_INSTALL_PATH := $$($(1)_INSTALL_DIR)/$(1)
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$$(eval $$(call create-dir,$$($(1)_INSTALL_DIR)))
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install: $$($(1)_INSTALL_PATH)
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ifeq ($(BUILD_SHARED_LIBS), 1)
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_libs_final := $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_INSTALL_PATH))
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$$($(1)_INSTALL_PATH): $$($(1)_OBJS) $$(_libs_final) | $$($(1)_INSTALL_DIR)
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$(QUIET) $(CXX) -o $$@ $(GLOBAL_LDFLAGS) $$($(1)_OBJS) $$($(1)_LDFLAGS) $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_LDFLAGS_USE_INSTALLED))
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else
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$$($(1)_INSTALL_PATH): $$($(1)_PATH) | $$($(1)_INSTALL_DIR)
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install -t $$($(1)_INSTALL_DIR) $$<
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endif
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# Propagate CXXFLAGS to the individual object files.
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$$(foreach obj, $$($(1)_OBJS), $$(eval $$(obj)_CXXFLAGS=$$($(1)_CXXFLAGS)))
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# Make each object file depend on the common dependencies.
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$$(foreach obj, $$($(1)_OBJS), $$(eval $$(obj): $$($(1)_COMMON_DEPS)))
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# Include .dep files, if they exist.
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$(1)_DEPS := $$(addsuffix .dep, $$(basename $$(_srcs)))
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-include $$($(1)_DEPS)
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programs_list += $$($(1)_PATH)
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clean_files += $$($(1)_PATH) $$(_d)/*.o $$(_d)/*.dep $$($(1)_DEPS) $$($(1)_OBJS)
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dist_files += $$(_srcs)
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endef
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