bin/mdw-build: Fetch `distdir' more robustly.

Some build scripts will try to build something before they can properly
answer the `print-distdir' question.  Avoid being confused by the
resulting spam by writing the distribution directory name to a weird
file descriptor.

diff --git a/bin/mdw-build b/bin/mdw-build
index bd1b457117baa51c59bbadbe80a1b4663c24a3f6..69a6642b7d6eca7f260c0e3e3b861bf99f345375 100755 (executable)
--- a/bin/mdw-build
+++ b/bin/mdw-build
@@ -285,9 +285,10 @@ esac
 cat >find-distdir.mk <<'EOF'
 include Makefile
 print-distdir:
-       @echo $(distdir)
+       @echo >&3 $(distdir)
 EOF
-assign distdir $(make -f find-distdir.mk print-distdir)
+assign distdir \
+       $({ make -f find-distdir.mk print-distdir >/dev/null 2>&1; } 3>&1)
 
 ## Get a tarball distribution.
 case "$distcheck" in