lib9: stop build if ../version.bash fails

R=golang-dev, m, rsc
CC=golang-dev
https://golang.org/cl/4639091

diff --git a/src/lib9/Makefile b/src/lib9/Makefile
index d222e2f5314386fd10a99578c3580d7cd70bb559..28c97c9b4564bd105489388cfb064e8bba1671e3 100644 (file)
--- a/src/lib9/Makefile
+++ b/src/lib9/Makefile
@@ -116,5 +116,6 @@ GOROOT_FINAL?=$(GOROOT)
        $(HOST_CC) -c $(HOST_CFLAGS) $<
 
 goos.$O: goos.c
-       $(HOST_CC) -c $(HOST_CFLAGS) -DGOOS='"$(GOOS)"' -DGOARCH='"$(GOARCH)"' -DGOROOT='"$(GOROOT_FINAL)"' -DGOVERSION='"'"$$(../version.bash)"'"' $<
+       GOVERSION=`../version.bash` && \
+               $(HOST_CC) -c $(HOST_CFLAGS) -DGOOS='"$(GOOS)"' -DGOARCH='"$(GOARCH)"' -DGOROOT='"$(GOROOT_FINAL)"' -DGOVERSION='"'"$$GOVERSION"'"' $<