Author: "P. J. McDermott" Forwarded: https://sourceware.org/ml/libc-alpha/2013-09/msg00286.html Applied-Upstream: 2.19, https://sourceware.org/git/?p=glibc.git;a=commit;h=0a834dd Last-Update: 2013-09-29 Subject: Don't use Bash-specific ${parameter/pattern/string} expansion sysdeps/unix/make-syscalls.sh and sysdeps/unix/Makefile use GNU Bash's ${parameter/pattern/string} parameter expansion. Non-Bash shells (e.g. dash or BusyBox ash when built with CONFIG_ASH_BASH_COMPAT disabled) don't support this expansion syntax. So glibc will fail to build when $(SHELL) expands to a path that isn't provided by Bash. An example build failure: 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 $dir = sysdeps/unix && break; \ done > [build-dir]/sysd-syscallsT sysdeps/unix/make-syscalls.sh: line 273: syntax error: bad substitution This patch simply replaces the three instances of the Bash-only syntax in these files with an echo and sed command substitution. diff -Naur src.orig/libc/sysdeps/unix/make-syscalls.sh src/libc/sysdeps/unix/make-syscalls.sh --- src.orig/libc/sysdeps/unix/make-syscalls.sh 2012-12-02 16:11:45.000000000 -0500 +++ src/libc/sysdeps/unix/make-syscalls.sh 2013-06-25 12:01:55.178740324 -0400 @@ -275,7 +275,7 @@ # name in the vDSO and KERNEL_X.Y is its symbol version. vdso_symbol="${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\ diff -Naur src.orig/libc/sysdeps/unix/Makefile src/libc/sysdeps/unix/Makefile --- src.orig/libc/sysdeps/unix/Makefile 2012-11-06 12:31:45.000000000 -0500 +++ src/libc/sysdeps/unix/Makefile 2013-06-25 12:59:59.068197711 -0400 @@ -51,12 +51,14 @@ for call in $(unix-stub-syscalls); do \ case $$call in \ *@@*) \ - ver=$${call##*@}; call=$${call%%@*}; ver=$${ver//./_}; \ + ver=$${call##*@}; call=$${call%%@*}; \ + ver=`echo "$ver" | sed 's/\./_/g'`; \ echo "strong_alias (_no_syscall, __$${call}_$${ver})"; \ echo "versioned_symbol (libc, __$${call}_$${ver}, $$call, $$ver);"\ ;; \ *@*) \ - ver=$${call##*@}; call=$${call%%@*}; ver=$${ver//./_}; \ + ver=$${call##*@}; call=$${call%%@*}; \ + ver=`echo "$ver" | sed 's/\./_/g'`; \ echo "strong_alias (_no_syscall, __$${call}_$${ver})"; \ echo "compat_symbol (libc, __$${call}_$${ver}, $$call, $$ver);" \ ;; \