Bug 620907 js/src/build/unix is missing print-failed-commands.sh

r=khuey a=bsmedberg

--HG--
rename : build/unix/print-failed-commands.sh => js/src/build/unix/print-failed-commands.sh

js/src/build/unix/print-failed-commands.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+#
+# Usage from makefile:
+#   ELOG = . $(topdir)/build/autoconf/print-failed-commands.sh
+#   $(ELOG) $(CC) $CFLAGS -o $@ $<
+#
+# This shell script is used by the build system to print out commands that fail
+# to execute properly.  It is designed to make the "make -s" command more
+# useful.
+#
+# Note that in the example we are sourcing rather than execing the script.
+# Since make already started a shell for us, we might as well use it rather
+# than starting a new one.
+
+( exec "$@" ) || {
+    echo
+    echo "In the directory " `pwd`
+    echo "The following command failed to execute properly:"
+    echo "$@"
+    exit 1;
+}