[TRIVIAL] avoid "expr length" (improved version)

[Rusty Russell]

 From:  Martin Schaffner <maschaffner@xxxxxx>

---
  I improved my patch to avoid the "expr length" GNU-ism. It should be 
  much clearer now. It uses "wc -c" to count the letters.
  
  Thanks,
  Martin
  

--- trivial-2.6.5-rc2-bk2/Makefile.orig	2004-03-23 10:11:35.000000000 +1100
+++ trivial-2.6.5-rc2-bk2/Makefile	2004-03-23 10:11:35.000000000 +1100
@@ -652,7 +652,7 @@
 uts_len := 64
 
 define filechk_version.h
-	if expr length "$(KERNELRELEASE)" \> $(uts_len) >/dev/null ; then \
+	if ((`echo -n "$(KERNELRELEASE)" | wc -c ` > $(uts_len))); then \
 	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
 	  exit 1; \
 	fi; \
-- 
  What is this? http://www.kernel.org/pub/linux/kernel/people/rusty/trivial/
  Don't blame me: the Monkey is driving
  File: Martin Schaffner <maschaffner@xxxxxx>: [PATCH] avoid "expr length" (improved version)

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