On 9/5/19 10:59 AM, Andrii Nakryiko wrote:
> ${@:2} is BASH-specific extension, which makes link-vmlinux.sh rely on
> BASH. Use shift and ${@} instead to fix this issue.
>
> Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
> Fixes: 341dfcf8d78e ("btf: expose BTF info through sysfs")
> Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
> Cc: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
> Signed-off-by: Andrii Nakryiko <andriin@xxxxxx>
Tested with bash/sh/csh, all works.
Acked-by: Yonghong Song <yhs@xxxxxx>
> ---
> scripts/link-vmlinux.sh | 16 +++++++++++-----
> 1 file changed, 11 insertions(+), 5 deletions(-)
>
> diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
> index 0d8f41db8cd6..8c59970a09dc 100755
> --- a/scripts/link-vmlinux.sh
> +++ b/scripts/link-vmlinux.sh
> @@ -57,12 +57,16 @@ modpost_link()
>
> # Link of vmlinux
> # ${1} - output file
> -# ${@:2} - optional extra .o files
> +# ${2}, ${3}, ... - optional extra .o files
> vmlinux_link()
> {
> local lds="${objtree}/${KBUILD_LDS}"
> + local output=${1}
> local objects
>
> + # skip output file argument
> + shift
> +
> if [ "${SRCARCH}" != "um" ]; then
> objects="--whole-archive \
> ${KBUILD_VMLINUX_OBJS} \
> @@ -70,9 +74,10 @@ vmlinux_link()
> --start-group \
> ${KBUILD_VMLINUX_LIBS} \
> --end-group \
> - ${@:2}"
> + ${@}"
>
> - ${LD} ${KBUILD_LDFLAGS} ${LDFLAGS_vmlinux} -o ${1} \
> + ${LD} ${KBUILD_LDFLAGS} ${LDFLAGS_vmlinux} \
> + -o ${output} \
> -T ${lds} ${objects}
> else
> objects="-Wl,--whole-archive \
> @@ -81,9 +86,10 @@ vmlinux_link()
> -Wl,--start-group \
> ${KBUILD_VMLINUX_LIBS} \
> -Wl,--end-group \
> - ${@:2}"
> + ${@}"
>
> - ${CC} ${CFLAGS_vmlinux} -o ${1} \
> + ${CC} ${CFLAGS_vmlinux} \
> + -o ${output} \
> -Wl,-T,${lds} \
> ${objects} \
> -lutil -lrt -lpthread
>
