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programs-list :=
# Build a program with symbolic name $(1). The program is defined by
# various variables prefixed by ‘$(1)_’:
#
# - $(1)_DIR: the directory where the (non-installed) program will be
# placed.
#
# - $(1)_SOURCES: the source files of the program.
#
# - $(1)_LIBS: the symbolic names of libraries on which this program
# depends.
#
# - $(1)_LDFLAGS: additional linker flags.
#
# - $(1)_INSTALL_DIR: the directory where the program will be
# installed; defaults to $(bindir).
define build-program
_d := $$($(1)_DIR)
_srcs := $$(sort $$(foreach src, $$($(1)_SOURCES), $$(src)))
$(1)_OBJS := $$(addsuffix .o, $$(basename $$(_srcs)))
_libs := $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_PATH))
$(1)_PATH := $$(_d)/$(1)
$$(eval $$(call create-dir, $$(_d)))
$$($(1)_PATH): $$($(1)_OBJS) $$(_libs) | $$(_d)
$$(trace-ld) $(CXX) -o $$@ $(GLOBAL_LDFLAGS) $$($(1)_OBJS) $$($(1)_LDFLAGS) $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_LDFLAGS_USE))
$(1)_INSTALL_DIR ?= $$(bindir)
$(1)_INSTALL_PATH := $$($(1)_INSTALL_DIR)/$(1)
$$(eval $$(call create-dir, $$($(1)_INSTALL_DIR)))
install: $(DESTDIR)$$($(1)_INSTALL_PATH)
ifeq ($(BUILD_SHARED_LIBS), 1)
_libs_final := $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_INSTALL_PATH))
$(DESTDIR)$$($(1)_INSTALL_PATH): $$($(1)_OBJS) $$(_libs_final) | $(DESTDIR)$$($(1)_INSTALL_DIR)
$$(trace-ld) $(CXX) -o $$@ $(GLOBAL_LDFLAGS) $$($(1)_OBJS) $$($(1)_LDFLAGS) $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_LDFLAGS_USE_INSTALLED))
else
$(DESTDIR)$$($(1)_INSTALL_PATH): $$($(1)_PATH) | $(DESTDIR)$$($(1)_INSTALL_DIR)
install -t $$($(1)_INSTALL_DIR) $$<
endif
# Propagate CXXFLAGS to the individual object files.
$$(foreach obj, $$($(1)_OBJS), $$(eval $$(obj)_CXXFLAGS=$$($(1)_CXXFLAGS)))
# Make each object file depend on the common dependencies.
$$(foreach obj, $$($(1)_OBJS), $$(eval $$(obj): $$($(1)_COMMON_DEPS)))
# Include .dep files, if they exist.
$(1)_DEPS := $$(foreach fn, $$($(1)_OBJS), $$(call filename-to-dep, $$(fn)))
-include $$($(1)_DEPS)
programs-list += $$($(1)_PATH)
clean-files += $$($(1)_PATH) $$(_d)/*.o $$(_d)/.*.dep $$($(1)_DEPS) $$($(1)_OBJS)
dist-files += $$(_srcs)
endef
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