Add 'third_party/nix/' from commit 'be66c7a6b24e3c3c6157fd37b86c7203d14acf10' r/724

git-subtree-dir: third_party/nix
git-subtree-mainline: cf8cd640c1adf74a3706efbcb0ea4625da106fb2
git-subtree-split: be66c7a6b24e3c3c6157fd37b86c7203d14acf10

1 files changed, 162 insertions, 0 deletions

diff --git a/third_party/nix/mk/libraries.mk b/third_party/nix/mk/libraries.mk
new file mode 100644
index 000000000000..307e29b9d05b
--- /dev/null
+++ b/third_party/nix/mk/libraries.mk
@@ -0,0 +1,162 @@
+libs-list :=
+
+ifeq ($(OS), Darwin)
+  SO_EXT = dylib
+else
+  ifeq (CYGWIN,$(findstring CYGWIN,$(OS)))
+    SO_EXT = dll
+  else
+    SO_EXT = so
+  endif
+endif
+
+# Build a library with symbolic name $(1).  The library is defined by
+# various variables prefixed by ‘$(1)_’:
+#
+# - $(1)_NAME: the name of the library (e.g. ‘libfoo’); defaults to
+#   $(1).
+#
+# - $(1)_DIR: the directory where the (non-installed) library will be
+#   placed.
+#
+# - $(1)_SOURCES: the source files of the library.
+#
+# - $(1)_CFLAGS: additional C compiler flags.
+#
+# - $(1)_CXXFLAGS: additional C++ compiler flags.
+#
+# - $(1)_ORDER_AFTER: a set of targets on which the object files of
+#   this libraries will have an order-only dependency.
+#
+# - $(1)_LIBS: the symbolic names of other libraries on which this
+#   library depends.
+#
+# - $(1)_ALLOW_UNDEFINED: if set, the library is allowed to have
+#   undefined symbols.  Has no effect for static libraries.
+#
+# - $(1)_LDFLAGS: additional linker flags.
+#
+# - $(1)_LDFLAGS_PROPAGATED: additional linker flags, also propagated
+#   to the linking of programs/libraries that use this library.
+#
+# - $(1)_FORCE_INSTALL: if defined, the library will be installed even
+#   if it's not needed (i.e. dynamically linked) by a program.
+#
+# - $(1)_INSTALL_DIR: the directory where the library will be
+#   installed.  Defaults to $(libdir).
+#
+# - $(1)_EXCLUDE_FROM_LIBRARY_LIST: if defined, the library will not
+#   be automatically marked as a dependency of the top-level all
+#   target andwill not be listed in the make help output. This is
+#   useful for libraries built solely for testing, for example.
+#
+# - BUILD_SHARED_LIBS: if equal to ‘1’, a dynamic library will be
+#   built, otherwise a static library.
+define build-library
+  $(1)_NAME ?= $(1)
+  _d := $(buildprefix)$$(strip $$($(1)_DIR))
+  _srcs := $$(sort $$(foreach src, $$($(1)_SOURCES), $$(src)))
+  $(1)_OBJS := $$(addprefix $(buildprefix), $$(addsuffix .o, $$(basename $$(_srcs))))
+  _libs := $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_PATH))
+
+  ifeq (CYGWIN,$(findstring CYGWIN,$(OS)))
+    $(1)_INSTALL_DIR ?= $$(bindir)
+  else
+    $(1)_INSTALL_DIR ?= $$(libdir)
+  endif
+
+  $(1)_LDFLAGS_USE :=
+  $(1)_LDFLAGS_USE_INSTALLED :=
+
+  $$(eval $$(call create-dir, $$(_d)))
+
+  ifeq ($(BUILD_SHARED_LIBS), 1)
+
+    ifdef $(1)_ALLOW_UNDEFINED
+      ifeq ($(OS), Darwin)
+        $(1)_LDFLAGS += -undefined suppress -flat_namespace
+      endif
+    else
+      ifneq ($(OS), Darwin)
+        ifneq (CYGWIN,$(findstring CYGWIN,$(OS)))
+          $(1)_LDFLAGS += -Wl,-z,defs
+        endif
+      endif
+    endif
+
+    ifneq ($(OS), Darwin)
+      $(1)_LDFLAGS += -Wl,-soname=$$($(1)_NAME).$(SO_EXT)
+    endif
+
+    $(1)_PATH := $$(_d)/$$($(1)_NAME).$(SO_EXT)
+
+    $$($(1)_PATH): $$($(1)_OBJS) $$(_libs) | $$(_d)/
+	$$(trace-ld) $(CXX) -o $$(abspath $$@) -shared $$(LDFLAGS) $$(GLOBAL_LDFLAGS) $$($(1)_OBJS) $$($(1)_LDFLAGS) $$($(1)_LDFLAGS_PROPAGATED) $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_LDFLAGS_USE)) $$($(1)_LDFLAGS_UNINSTALLED)
+
+    ifneq ($(OS), Darwin)
+      $(1)_LDFLAGS_USE += -Wl,-rpath,$$(abspath $$(_d))
+    endif
+    $(1)_LDFLAGS_USE += -L$$(_d) -l$$(patsubst lib%,%,$$(strip $$($(1)_NAME)))
+
+    $(1)_INSTALL_PATH := $(DESTDIR)$$($(1)_INSTALL_DIR)/$$($(1)_NAME).$(SO_EXT)
+
+    _libs_final := $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_INSTALL_PATH))
+
+    $$(eval $$(call create-dir, $$($(1)_INSTALL_DIR)))
+
+    $$($(1)_INSTALL_PATH): $$($(1)_OBJS) $$(_libs_final) | $(DESTDIR)$$($(1)_INSTALL_DIR)/
+	$$(trace-ld) $(CXX) -o $$@ -shared $$(LDFLAGS) $$(GLOBAL_LDFLAGS) $$($(1)_OBJS) $$($(1)_LDFLAGS) $$($(1)_LDFLAGS_PROPAGATED) $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_LDFLAGS_USE_INSTALLED))
+
+    $(1)_LDFLAGS_USE_INSTALLED += -L$$(DESTDIR)$$($(1)_INSTALL_DIR) -l$$(patsubst lib%,%,$$(strip $$($(1)_NAME)))
+    ifneq ($(OS), Darwin)
+      ifeq ($(SET_RPATH_TO_LIBS), 1)
+        $(1)_LDFLAGS_USE_INSTALLED += -Wl,-rpath,$$($(1)_INSTALL_DIR)
+      else
+        $(1)_LDFLAGS_USE_INSTALLED += -Wl,-rpath-link,$$($(1)_INSTALL_DIR)
+      endif
+    endif
+
+    ifdef $(1)_FORCE_INSTALL
+      install: $$($(1)_INSTALL_PATH)
+    endif
+
+  else
+
+    $(1)_PATH := $$(_d)/$$($(1)_NAME).a
+
+    $$($(1)_PATH): $$($(1)_OBJS) | $$(_d)/
+	$(trace-ar) $(AR) crs $$@ $$?
+
+    $(1)_LDFLAGS_USE += $$($(1)_PATH) $$($(1)_LDFLAGS)
+
+    $(1)_INSTALL_PATH := $$(libdir)/$$($(1)_NAME).a
+
+  endif
+
+  $(1)_LDFLAGS_USE += $$($(1)_LDFLAGS_PROPAGATED)
+  $(1)_LDFLAGS_USE_INSTALLED += $$($(1)_LDFLAGS_PROPAGATED)
+
+  # Propagate CFLAGS and CXXFLAGS to the individual object files.
+  $$(foreach obj, $$($(1)_OBJS), $$(eval $$(obj)_CFLAGS=$$($(1)_CFLAGS)))
+  $$(foreach obj, $$($(1)_OBJS), $$(eval $$(obj)_CXXFLAGS=$$($(1)_CXXFLAGS)))
+
+  # Make each object file depend on the common dependencies.
+  $$(foreach obj, $$($(1)_OBJS), $$(eval $$(obj): $$($(1)_COMMON_DEPS) $$(GLOBAL_COMMON_DEPS)))
+
+  # Make each object file have order-only dependencies on the common
+  # order-only dependencies. This includes the order-only dependencies
+  # of libraries we're depending on.
+  $(1)_ORDER_AFTER_CLOSED = $$($(1)_ORDER_AFTER) $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_ORDER_AFTER_CLOSED))
+
+  $$(foreach obj, $$($(1)_OBJS), $$(eval $$(obj): | $$($(1)_ORDER_AFTER_CLOSED) $$(GLOBAL_ORDER_AFTER)))
+
+  # Include .dep files, if they exist.
+  $(1)_DEPS := $$(foreach fn, $$($(1)_OBJS), $$(call filename-to-dep, $$(fn)))
+  -include $$($(1)_DEPS)
+
+  ifndef $(1)_EXCLUDE_FROM_LIBRARY_LIST
+  libs-list += $$($(1)_PATH)
+  endif
+  clean-files += $$(_d)/*.a $$(_d)/*.$(SO_EXT) $$(_d)/*.o $$(_d)/.*.dep $$($(1)_DEPS) $$($(1)_OBJS)
+  dist-files += $$(_srcs)
+endef