[PATCH] build-sys: remove non-POSIX variable names

[Karel Zak <kzak@redhat.com>]

Makefile.am:24: shell echo $$(( $(VERSION: non-POSIX variable name
Makefile.am:24: (probably a GNU make extension)
Makefile.am:26: shell echo $$(($(VERSION: non-POSIX variable name
Makefile.am:26: (probably a GNU make extension)
Makefile.am:29: shell echo $$(($(VERSION: non-POSIX variable name
Makefile.am:29: (probably a GNU make extension)

Signed-off-by: Karel Zak <kzak@redhat.com>
---
 Makefile.am |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index ae21bca..a4260ea 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -12,6 +12,8 @@ EXTRA_DIST = \
 	docs \
 	autogen.sh
 
+PREVIOUS_VERSION = `expr $(VERSION) - 1`
+
 distclean-local:
 	rm -f *~
 	rm -rf autom4te.cache
@@ -21,12 +23,12 @@ distclean-local:
 	rm -f udev-$(VERSION).tar.gz udev-$(VERSION).tar.bz2
 
 changelog:
-	@ head -1 ChangeLog | grep -q "to v$(shell echo $$(($(VERSION) - 1)))"
+	@ head -1 ChangeLog | grep -q "to $(PREVIOUS_VERSION)"
 	@ mv ChangeLog ChangeLog.tmp
-	@ echo "Summary of changes from v$(shell echo $$(($(VERSION) - 1))) to v$(VERSION)" >> ChangeLog
+	@ echo "Summary of changes from v$(PREVIOUS_VERSION) to v$(VERSION)" >> ChangeLog
 	@ echo "======================" >> ChangeLog
 	@ echo >> ChangeLog
-	@ git log --pretty=short $(shell echo $$(($(VERSION) - 1)))..HEAD | git shortlog  >> ChangeLog
+	@ git log --pretty=short $(PREVIOUS_VERSION)..HEAD | git shortlog  >> ChangeLog
 	@ echo >> ChangeLog
 	@ cat ChangeLog
 	@ cat ChangeLog.tmp >> ChangeLog
-- 
1.5.5.1