[PATCH 2.4.23, 2.6.0-test11] avoid the use of unportable "expr length"

[Martin Schaffner]

Hi!

I tried to cross-compile from Mac OS X, which failed because the Makefile
uses the "length" feature of GNU expr, which is not found in BSD expr. Here's a
fix.

Please CC me when replying.

--- a/Makefile	2003-12-09 13:54:50.000000000 +0100
+++ b/Makefile	2003-12-09 13:56:39.000000000 +0100
@@ -640,7 +640,7 @@
 uts_len := 64
 
 define filechk_version.h
-	if expr length "$(KERNELRELEASE)" \> $(uts_len) >/dev/null ; then \
+	if expr "$(KERNELRELEASE)" : '.*' \> $(uts_len) >/dev/null ; then \
 	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
 	  exit 1; \
 	fi; \


--- a/Makefile   2003-12-09 14:27:56.000000000 +0100
+++ b/Makefile   2003-12-09 14:28:37.000000000 +0100
@@ -353,7 +353,7 @@
        @rm -f .ver1

 include/linux/version.h: ./Makefile
-       @expr length "$(KERNELRELEASE)" \<= $(uts_len) > /dev/null || \
+       @expr "$(KERNELRELEASE)" : '.*' \<= $(uts_len) > /dev/null || \
          (echo KERNELRELEASE \"$(KERNELRELEASE)\" exceeds $(uts_len)
characters >&2; false)
        @echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" > .ver
        @echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 +
$(PATCHLEVEL) \\* 256 + $(SUBLEVEL)` >> .ver

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