dir := lib
extra_cflags += -I$(dir)
-libnotmuch_c_srcs = \
+libnotmuch_c_srcs := \
$(dir)/libsha1.c \
$(dir)/message-file.c \
$(dir)/messages.c \
$(dir)/tags.c \
$(dir)/xutil.c
-libnotmuch_cxx_srcs = \
+libnotmuch_cxx_srcs := \
$(dir)/database.cc \
$(dir)/directory.cc \
$(dir)/index.cc \
$(dir)/query.cc \
$(dir)/thread.cc
-libnotmuch_modules = $(libnotmuch_c_srcs:.c=.o) $(libnotmuch_cxx_srcs:.cc=.o)
-$(dir)/notmuch.a: $(libnotmuch_modules)
+libnotmuch_modules := $(libnotmuch_c_srcs:.c=.o) $(libnotmuch_cxx_srcs:.cc=.o)
+$(dir)/notmuch.a: $(libnotmuch_modules) $(getdate_modules)
$(call quiet,AR) rcs $@ $^
SRCS := $(SRCS) $(libnotmuch_c_srcs) $(libnotmuch_cxx_srcs)