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, 33 insertions, 0 deletions

diff --git a/third_party/nix/src/libexpr/local.mk b/third_party/nix/src/libexpr/local.mk
new file mode 100644
index 000000000000..ccd5293e4e5e
--- /dev/null
+++ b/third_party/nix/src/libexpr/local.mk
@@ -0,0 +1,33 @@
+libraries += libexpr
+
+libexpr_NAME = libnixexpr
+
+libexpr_DIR := $(d)
+
+libexpr_SOURCES := $(wildcard $(d)/*.cc) $(wildcard $(d)/primops/*.cc) $(d)/lexer-tab.cc $(d)/parser-tab.cc
+
+libexpr_LIBS = libutil libstore
+
+libexpr_LDFLAGS =
+ifneq ($(OS), FreeBSD)
+ libexpr_LDFLAGS += -ldl
+endif
+
+# The dependency on libgc must be propagated (i.e. meaning that
+# programs/libraries that use libexpr must explicitly pass -lgc),
+# because inline functions in libexpr's header files call libgc.
+libexpr_LDFLAGS_PROPAGATED = $(BDW_GC_LIBS)
+
+libexpr_ORDER_AFTER := $(d)/parser-tab.cc $(d)/parser-tab.hh $(d)/lexer-tab.cc $(d)/lexer-tab.hh
+
+$(d)/parser-tab.cc $(d)/parser-tab.hh: $(d)/parser.y
+	$(trace-gen) bison -v -o $(libexpr_DIR)/parser-tab.cc $< -d
+
+$(d)/lexer-tab.cc $(d)/lexer-tab.hh: $(d)/lexer.l
+	$(trace-gen) flex --outfile $(libexpr_DIR)/lexer-tab.cc --header-file=$(libexpr_DIR)/lexer-tab.hh $<
+
+clean-files += $(d)/parser-tab.cc $(d)/parser-tab.hh $(d)/lexer-tab.cc $(d)/lexer-tab.hh
+
+dist-files += $(d)/parser-tab.cc $(d)/parser-tab.hh $(d)/lexer-tab.cc $(d)/lexer-tab.hh
+
+$(eval $(call install-file-in, $(d)/nix-expr.pc, $(prefix)/lib/pkgconfig, 0644))