adding go wrapper

Makefile.am

@@ -16,6 +16,49 @@ DIST_SUBDIRS = $(SUBDIRS)
 distclean-local:
 	@rm -rf $(top_srcdir)/autom4te.cache
 
+clean-local:
+	rm -rf $(builddir)/go.mod $(builddir)/go.sum
+	go clean -C $(srcdir) -x -modfile $(abs_builddir)/go.mod -cache
+
+######################################################################
+if ENABLE_HAWKGO
+bin_PROGRAMS = hawkgo
+hawkgo_SOURCES = \
+	hawk.go \
+	hawk-inst.go \
+	go.mod
+hawkgo_DEPENDENCIES = hawkgo.bin
+
+## let the linker to move hawkgo.bin to the actual target
+hawkgo_LINK = cp -pf hawkgo.bin hawkgo$(EXEEXT) || echo "FAILED TO LINK"
+
+if ENABLE_STATIC
+CGO_CFLAGS_EXTRA="-static"
+CGO_LDFLAGS_EXTRA="-static"
+else
+CGO_CFLAGS_EXTRA=""
+CGO_LDFLAGS_EXTRA=""
+endif
+
+hawkgo.bin: lib/libhawk.la $(hawkgo_OBJECTS)
+	cp -pf $(srcdir)/go.mod $(builddir)/go.mod >/dev/null 2>&1 || true
+	chmod u+w $(builddir)/go.mod ## with `make distcheck`, the echo's redirection to the file fails without this permission change
+	[ -f $(srcdir)/go.sum ] && cp -pf $(srcdir)/go.sum $(builddir)/go.sum >/dev/null 2>&1 || true
+	## ---------------------------------------------------------------
+	CC=$(CC) \
+	CGO_CFLAGS="-I$(abs_srcdir)/lib -I$(abs_builddir)/lib $(CFLAGS) $(CGO_CFLAGS_EXTRA)" \
+	CGO_LDFLAGS="-L$(abs_builddir)/lib -L$(abs_builddir)/lib/.libs -lhawk -ldl $(LIBM) $(CGO_LDFLAGS_EXTRA)"  \
+	go build -C $(srcdir) -ldflags "-X 'main.BINDIR=$(bindir)' -X 'main.SBINDIR=$(sbindir)' -X 'main.LIBDIR=$(libdir)' -X 'main.SYSCONFDIR=$(sysconfdir)'" -x -o $(abs_builddir)/hawkgo.bin -modfile $(abs_builddir)/go.mod
+	## ---------------------------------------------------------------
+	go clean -C $(srcdir) -x -modfile $(abs_builddir)/go.mod
+# fake recipes to deceive make
+.go.o:
+	echo $< > $@
+
+.mod.o:
+	echo $< > $@
+
+endif
 ######################################################################
 
 rpm: dist-gzip