From: "P. J. McDermott" <pjm@nac.net>
Description: Fix "bad substitution" errors in shell script
 make-syscalls.sh uses GNU Bash's "${parameter/pattern/string}" parameter
 expansion.  Non-Bash shells (e.g. BusyBox ash built with CONFIG_ASH_BASH_COMPAT
 disabled) don't support this syntax:
 .
    for dir in [...]; do \
      test -f $dir/syscalls.list && \
      { sysdirs='[...]' \
        asm_CPP='gcc -c    -I[...]   -D_LIBC_REENTRANT -include include/libc-symbols.h       -DASSEMBLER  -g -Wa,--noexecstack   -E -x assembler-with-cpp' \
        /bin/sh sysdeps/unix/make-syscalls.sh $dir || exit 1; }; \
      test $dir = sysdeps/unix && break; \
    done > /usr/src/eglibc_2.17~r22751+sip1-1/tmp/libcbuild/sysd-syscallsT
    sysdeps/unix/make-syscalls.sh: line 273: syntax error: bad substitution

diff -Naur src.orig/libc/sysdeps/unix/make-syscalls.sh src/libc/sysdeps/unix/make-syscalls.sh
--- src.orig/libc/sysdeps/unix/make-syscalls.sh	2012-12-02 16:11:45.000000000 -0500
+++ src/libc/sysdeps/unix/make-syscalls.sh	2013-06-25 12:01:55.178740324 -0400
@@ -279,7 +279,7 @@
     # name in the vDSO and KERNEL_X.Y is its symbol version.
     vdso_symbol="${vdso_syscall%@*}"
     vdso_symver="${vdso_syscall#*@}"
-    vdso_symver="${vdso_symver//./_}"
+    vdso_symver=`echo $vdso_symver | sed 's/\./_/g'`
     echo "\
 \$(foreach p,\$(sysd-rules-targets),\$(objpfx)\$(patsubst %,\$p,$file).os): \\
 		\$(..)sysdeps/unix/make-syscalls.sh\