-dir=lib
-
-lib_notmuch_modules = \
- $(dir)/database.o \
- $(dir)/index.o \
- $(dir)/$(dir)sha1.o \
- $(dir)/message.o \
- $(dir)/message-file.o \
- $(dir)/query.o \
- $(dir)/sha1.o \
- $(dir)/tags.o \
- $(dir)/thread.o \
- $(dir)/xutil.o
-
-$(dir)/notmuch.a: $(lib_notmuch_modules)
- $(AR) rcs $@ $^
-
-SRCS := $(SRCS) lib/*.c lib/*.cc
-CLEAN := $(CLEAN) $(dir)/*.o $(dir)/notmuch.a
+# -*- makefile -*-
+
+dir := lib
+
+# The (often-reused) $dir works fine within targets/prerequisites,
+# but cannot be used reliably within commands, so copy its value to a
+# variable that is not reused.
+lib := $(dir)
+
+ifeq ($(PLATFORM),MACOSX)
+LIBRARY_SUFFIX = dylib
+# On OS X, library version numbers go before suffix.
+LINKER_NAME = libnotmuch.$(LIBRARY_SUFFIX)
+SONAME = libnotmuch.$(LIBNOTMUCH_VERSION_MAJOR).$(LIBRARY_SUFFIX)
+LIBNAME = libnotmuch.$(LIBNOTMUCH_VERSION_MAJOR).$(LIBNOTMUCH_VERSION_MINOR).$(LIBNOTMUCH_VERSION_RELEASE).$(LIBRARY_SUFFIX)
+LIBRARY_LINK_FLAG = -dynamiclib -install_name $(libdir)/$(SONAME) -compatibility_version $(LIBNOTMUCH_VERSION_MAJOR).$(LIBNOTMUCH_VERSION_MINOR) -current_version $(LIBNOTMUCH_VERSION_MAJOR).$(LIBNOTMUCH_VERSION_MINOR).$(LIBNOTMUCH_VERSION_RELEASE)
+else
+LIBRARY_SUFFIX = so
+LINKER_NAME = libnotmuch.$(LIBRARY_SUFFIX)
+SONAME = $(LINKER_NAME).$(LIBNOTMUCH_VERSION_MAJOR)
+LIBNAME = $(SONAME).$(LIBNOTMUCH_VERSION_MINOR).$(LIBNOTMUCH_VERSION_RELEASE)
+LIBRARY_LINK_FLAG = -shared -Wl,--version-script=$(lib)/notmuch.sym,-soname=$(SONAME) $(NO_UNDEFINED_LDFLAGS)
+ifeq ($(PLATFORM),OPENBSD)
+LIBRARY_LINK_FLAG += -lc
+endif
+ifeq ($(LIBDIR_IN_LDCONFIG),1)
+ifeq ($(DESTDIR),)
+LIBRARY_INSTALL_POST_COMMAND=ldconfig
+endif
+endif
+endif
+
+extra_cflags += -I$(srcdir)/$(dir) -fPIC -fvisibility=hidden
+extra_cxxflags += -fvisibility-inlines-hidden
+
+libnotmuch_c_srcs = \
+ $(notmuch_compat_srcs) \
+ $(dir)/filenames.c \
+ $(dir)/string-list.c \
+ $(dir)/message-file.c \
+ $(dir)/message-id.c \
+ $(dir)/messages.c \
+ $(dir)/sha1.c \
+ $(dir)/built-with.c \
+ $(dir)/string-map.c \
+ $(dir)/indexopts.c \
+ $(dir)/tags.c
+
+libnotmuch_cxx_srcs = \
+ $(dir)/database.cc \
+ $(dir)/parse-time-vrp.cc \
+ $(dir)/directory.cc \
+ $(dir)/index.cc \
+ $(dir)/message.cc \
+ $(dir)/add-message.cc \
+ $(dir)/message-property.cc \
+ $(dir)/query.cc \
+ $(dir)/query-fp.cc \
+ $(dir)/config.cc \
+ $(dir)/regexp-fields.cc \
+ $(dir)/thread.cc
+
+libnotmuch_modules := $(libnotmuch_c_srcs:.c=.o) $(libnotmuch_cxx_srcs:.cc=.o)
+
+$(dir)/libnotmuch.a: $(libnotmuch_modules)
+ $(call quiet,AR) rcs $@ $^
+
+$(dir)/$(LIBNAME): $(libnotmuch_modules) util/libnotmuch_util.a parse-time-string/libparse-time-string.a
+ $(call quiet,CXX $(CXXFLAGS)) $(libnotmuch_modules) $(FINAL_LIBNOTMUCH_LDFLAGS) $(LIBRARY_LINK_FLAG) -o $@ util/libnotmuch_util.a parse-time-string/libparse-time-string.a
+
+$(dir)/$(SONAME): $(dir)/$(LIBNAME)
+ ln -sf $(LIBNAME) $@
+
+$(dir)/$(LINKER_NAME): $(dir)/$(SONAME)
+ ln -sf $(LIBNAME) $@
+
+install: install-$(dir)
+
+install-$(dir): $(dir)/$(LIBNAME)
+ mkdir -p "$(DESTDIR)$(libdir)/"
+ install -m0644 "$(lib)/$(LIBNAME)" "$(DESTDIR)$(libdir)/"
+ ln -sf $(LIBNAME) "$(DESTDIR)$(libdir)/$(SONAME)"
+ ln -sf $(LIBNAME) "$(DESTDIR)$(libdir)/$(LINKER_NAME)"
+ mkdir -p "$(DESTDIR)$(includedir)"
+ install -m0644 "$(srcdir)/$(lib)/notmuch.h" "$(DESTDIR)$(includedir)/"
+ $(LIBRARY_INSTALL_POST_COMMAND)
+
+SRCS := $(SRCS) $(libnotmuch_c_srcs) $(libnotmuch_cxx_srcs)
+CLEAN += $(libnotmuch_modules) $(dir)/$(SONAME) $(dir)/$(LINKER_NAME)
+CLEAN += $(dir)/$(LIBNAME) $(dir)/libnotmuch.a
+CLEAN += $(dir)/notmuch.h.gch