Robert P. J. DAY says:
According to Mike Frysinger, this patch was removed from Gentoo in the
2.3.x series and didn't seem to cause any adverse effects. So toss it
from the patch directories for glibc 2.5 and up.
1 # http://in3www.epfl.ch/~schaffne/linux-2.4-bsd-expr.patch
2 The following makes it possible to compile linux 2.4.19 to 2.4.25 on Mac OS X,
3 where "expr" doesn't understand the "length" construct
4 (which it doesn't have to, according to SuSv3
5 (see http://www.opengroup.org/onlinepubs/007904975/utilities/expr.html)
6 See also http://sources.redhat.com/ml/crossgcc/2004-02/msg00131.html
10 KERNELRELEASE "2.4.21" exceeds 64 characters
11 make: *** [include/linux/version.h] Error 1
14 diff -ur linux-2.4.23-old/Makefile linux-2.4.23/Makefile
15 --- linux-2.4.23-old/Makefile 2003-12-09 14:27:56.000000000 +0100
16 +++ linux-2.4.23/Makefile 2003-12-09 14:28:37.000000000 +0100
20 include/linux/version.h: ./Makefile
21 - @expr length "$(KERNELRELEASE)" \<= $(uts_len) > /dev/null || \
22 + @expr "$(KERNELRELEASE)" : '.*' \<= $(uts_len) > /dev/null || \
23 (echo KERNELRELEASE \"$(KERNELRELEASE)\" exceeds $(uts_len) characters >&2; false)
24 @echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" > .ver
25 @echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)` >> .ver