build: Set SHELL make variable to bash if possible

On Debian/Ubuntu systems, /bin/sh is /bin/dash which doesn't understand
the -e option to the `echo' builtin. Thus the build output looks
something like the following:

Building netsniff-ng toolkit (0.5.8-rc5+) for x86_64-linux-gnu:
Building netsniff-ng:
-e   CC	dissector.c
-e   CC	dissector_eth.c
-e   CC	dissector_80211.c
...

Prevent this by setting SHELL to /bin/bash if it exists on the system,
otherwise stick to /bin/sh.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 3 insertions, 0 deletions

diff --git a/Cmds b/Cmds
index c0e6032..8db24f5 100644
--- a/Cmds
+++ b/Cmds
@@ -1,6 +1,9 @@
 # Be quite and do not echo the cmd
 Q = @
 
+# Try to use bash as shell for make
+SHELL := $(shell if [ -x /bin/bash ]; then echo /bin/bash; else echo /bin/sh; fi ; fi)
+
 # GCC related stuff
 LD = $(Q)echo -e "  LD\t$@" && $(CCACHE) $(CROSS_COMPILE)gcc
 CCNQ = $(CCACHE) $(CROSS_COMPILE)gcc