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91b6833686
Today, with the tests inside a `tests` intermingled with the
corresponding library's source code, we have a few problems:
- We have to be careful that wildcards don't end up with tests being
built as part of Nix proper, or test headers being installed as part
of Nix proper.
- Tests in libraries but not executables is not right:
- It means each executable runs the previous unit tests again, because
it needs the libraries.
- It doesn't work right on Windows, which doesn't want you to load a
DLL just for the side global variable . It could be made to work
with the dlopen equivalent, but that's gross!
This reorg solves these problems.
There is a remaining problem which is that sibbling headers (like
`hash.hh` the test header vs `hash.hh` the main `libnixutil` header) end
up shadowing each other. This PR doesn't solve that. That is left as
future work for a future PR.
Co-authored-by: Valentin Gagarin <valentin.gagarin@tweag.io>
93 lines
3.3 KiB
Makefile
93 lines
3.3 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)_NAME: the name of the program (e.g. ‘foo’); defaults to
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# $(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)_CFLAGS: additional C compiler flags.
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#
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# - $(1)_CXXFLAGS: additional C++ compiler flags.
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#
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# - $(1)_ORDER_AFTER: a set of targets on which the object files of
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# this program will have an order-only dependency.
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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 $(bindir).
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define build-program
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$(1)_NAME ?= $(1)
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_d := $(buildprefix)$$($(1)_DIR)
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_srcs := $$(sort $$(foreach src, $$($(1)_SOURCES), $$(src)))
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$(1)_OBJS := $$(addprefix $(buildprefix), $$(addsuffix .o, $$(basename $$(_srcs))))
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_libs := $$(foreach lib, $$($(1)_LIBS), $$(foreach lib2, $$($$(lib)_LIB_CLOSURE), $$($$(lib2)_PATH)))
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$(1)_PATH := $$(_d)/$$($(1)_NAME)
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$$(eval $$(call create-dir, $$(_d)))
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$$($(1)_PATH): $$($(1)_OBJS) $$(_libs) | $$(_d)/
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+$$(trace-ld) $(CXX) -o $$@ $$(LDFLAGS) $$(GLOBAL_LDFLAGS) $$($(1)_OBJS) $$($(1)_LDFLAGS) $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_LDFLAGS_USE))
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$(1)_INSTALL_DIR ?= $$(bindir)
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ifdef $(1)_INSTALL_DIR
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$(1)_INSTALL_PATH := $$($(1)_INSTALL_DIR)/$$($(1)_NAME)
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$$(eval $$(call create-dir, $$($(1)_INSTALL_DIR)))
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install: $(DESTDIR)$$($(1)_INSTALL_PATH)
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ifeq ($(BUILD_SHARED_LIBS), 1)
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_libs_final := $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_INSTALL_PATH))
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$(DESTDIR)$$($(1)_INSTALL_PATH): $$($(1)_OBJS) $$(_libs_final) | $(DESTDIR)$$($(1)_INSTALL_DIR)/
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+$$(trace-ld) $(CXX) -o $$@ $$(LDFLAGS) $$(GLOBAL_LDFLAGS) $$($(1)_OBJS) $$($(1)_LDFLAGS) $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_LDFLAGS_USE_INSTALLED))
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else
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$(DESTDIR)$$($(1)_INSTALL_PATH): $$($(1)_PATH) | $(DESTDIR)$$($(1)_INSTALL_DIR)/
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+$$(trace-install) install -t $(DESTDIR)$$($(1)_INSTALL_DIR) $$<
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endif
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endif
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# Propagate CFLAGS and CXXFLAGS to the individual object files.
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$$(foreach obj, $$($(1)_OBJS), $$(eval $$(obj)_CFLAGS=$$($(1)_CFLAGS)))
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$$(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): $$($(1)_COMMON_DEPS) $$(GLOBAL_COMMON_DEPS)))
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# Make each object file have order-only dependencies on the common
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# order-only dependencies. This includes the order-only dependencies
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# of libraries we're depending on.
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$(1)_ORDER_AFTER_CLOSED = $$($(1)_ORDER_AFTER) $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_ORDER_AFTER_CLOSED))
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$$(foreach obj, $$($(1)_OBJS), $$(eval $$(obj): | $$($(1)_ORDER_AFTER_CLOSED) $$(GLOBAL_ORDER_AFTER)))
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# Include .dep files, if they exist.
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$(1)_DEPS := $$(foreach fn, $$($(1)_OBJS), $$(call filename-to-dep, $$(fn)))
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-include $$($(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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# Phony target to run this program (typically as a dependency of 'check').
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.PHONY: $(1)_RUN
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$(1)_RUN: $$($(1)_PATH)
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$(trace-test) $$($(1)_ENV) $$($(1)_PATH)
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endef
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