[PATCH v2] tools/configure: drop BASH configure variable

[Andrew Cooper <andrew.cooper3@citrix.com>]

This is a weird variable to have in the first place.  The only user of it is
XSM's CONFIG_SHELL, which opencodes a fallback to sh, and the only two scripts
run with this are shebang sh anyway, so don't need bash in the first place.

Make the mkflask.sh and mkaccess_vector.sh scripts executable, drop the
CONFIG_SHELL, and drop the $BASH variable to prevent further use.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
---
CC: Ian Jackson <Ian.Jackson@citrix.com>
CC: Wei Liu <wl@xen.org>
CC: Daniel De Graaf <dgdegra@tycho.nsa.gov>

./autogen.sh needs rerunning on commit.

v2:
 * Use $(SHELL)

There is a separate check for [BASH] in the configure script, which is
checking the requirement for the Linux hotplug scripts.  Really, that is a
runtime requirement not a build time requirement, and it is rude to require
bash in a build environment on this basis.  IMO, that check wants dropping as
well.
---
 config/Tools.mk.in                      | 1 -
 tools/configure.ac                      | 1 -
 xen/xsm/flask/Makefile                  | 8 ++------
 xen/xsm/flask/policy/mkaccess_vector.sh | 0
 xen/xsm/flask/policy/mkflask.sh         | 0
 5 files changed, 2 insertions(+), 8 deletions(-)
 mode change 100644 => 100755 xen/xsm/flask/policy/mkaccess_vector.sh
 mode change 100644 => 100755 xen/xsm/flask/policy/mkflask.sh

diff --git a/config/Tools.mk.in b/config/Tools.mk.in
index 23df47af8d..48bd9ab731 100644
--- a/config/Tools.mk.in
+++ b/config/Tools.mk.in
@@ -12,7 +12,6 @@ PYTHON              := @PYTHON@
 PYTHON_PATH         := @PYTHONPATH@
 PY_NOOPT_CFLAGS     := @PY_NOOPT_CFLAGS@
 PERL                := @PERL@
-BASH                := @BASH@
 XGETTTEXT           := @XGETTEXT@
 AS86                := @AS86@
 LD86                := @LD86@
diff --git a/tools/configure.ac b/tools/configure.ac
index 9d126b7a14..6614a4f130 100644
--- a/tools/configure.ac
+++ b/tools/configure.ac
@@ -297,7 +297,6 @@ AC_ARG_VAR([PYTHON], [Path to the Python parser])
 AC_ARG_VAR([PERL], [Path to Perl parser])
 AC_ARG_VAR([BISON], [Path to Bison parser generator])
 AC_ARG_VAR([FLEX], [Path to Flex lexical analyser generator])
-AC_ARG_VAR([BASH], [Path to bash shell])
 AC_ARG_VAR([XGETTEXT], [Path to xgetttext tool])
 AC_ARG_VAR([AS86], [Path to as86 tool])
 AC_ARG_VAR([LD86], [Path to ld86 tool])
diff --git a/xen/xsm/flask/Makefile b/xen/xsm/flask/Makefile
index 07f36d075d..50bec20a1e 100644
--- a/xen/xsm/flask/Makefile
+++ b/xen/xsm/flask/Makefile
@@ -8,10 +8,6 @@ CFLAGS-y += -I./include
 
 AWK = awk
 
-CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
-          else if [ -x /bin/bash ]; then echo /bin/bash; \
-          else echo sh; fi ; fi)
-
 FLASK_H_DEPEND = policy/security_classes policy/initial_sids
 AV_H_DEPEND = policy/access_vectors
 
@@ -24,14 +20,14 @@ extra-y += $(ALL_H_FILES)
 
 mkflask := policy/mkflask.sh
 quiet_cmd_mkflask = MKFLASK $@
-cmd_mkflask = $(CONFIG_SHELL) $(mkflask) $(AWK) include $(FLASK_H_DEPEND)
+cmd_mkflask = $(SHELL) $(mkflask) $(AWK) include $(FLASK_H_DEPEND)
 
 $(subst include/,%/,$(FLASK_H_FILES)): $(FLASK_H_DEPEND) $(mkflask) FORCE
 	$(call if_changed,mkflask)
 
 mkaccess := policy/mkaccess_vector.sh
 quiet_cmd_mkaccess = MKACCESS VECTOR $@
-cmd_mkaccess = $(CONFIG_SHELL) $(mkaccess) $(AWK) $(AV_H_DEPEND)
+cmd_mkaccess = $(SHELL) $(mkaccess) $(AWK) $(AV_H_DEPEND)
 
 $(subst include/,%/,$(AV_H_FILES)): $(AV_H_DEPEND) $(mkaccess) FORCE
 	$(call if_changed,mkaccess)
diff --git a/xen/xsm/flask/policy/mkaccess_vector.sh b/xen/xsm/flask/policy/mkaccess_vector.sh
old mode 100644
new mode 100755
diff --git a/xen/xsm/flask/policy/mkflask.sh b/xen/xsm/flask/policy/mkflask.sh
old mode 100644
new mode 100755
-- 
2.11.0