[Buildroot] [PATCH] netsniff-ng: add libsodium/nacl dependency, to build curvetun tool

[Yann E. MORIN <yann.morin.1998@free.fr>]

Zheng, All,

On 2019-11-04 21:58 +0800, Yi Zheng spake thusly:
> The tool 'curvetun' in netsniff-ng package can only be built
> when NACL/Sodium lib is added.
> 
> Adjust the dependency and the configure environ settings to
> build the curvetun tool.

Thanks for this new version of the patch. I have a few comments about
it.

First, the title should be something like:

    package/netsniff-ng: add option to build curvetun

Second, your patch does not apply as-is: the TABs have been replaced by
spaces. Please, can you use 'git send-emal' to send the patches, as this
keeps the integrity of the patch, next time?

> Signed-off-by: Yi Zheng <goodmenzy@gmail.com>
> ---
>  Makefile                           |  1 +
>  package/netsniff-ng/Config.in      |  5 +++++
>  package/netsniff-ng/netsniff-ng.mk | 13 ++++++++++++-
>  3 files changed, 18 insertions(+), 1 deletion(-)
> 
> diff --git a/Makefile b/Makefile
> index bab34ab9b5..e028a0dc60 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -1198,3 +1198,4 @@ include docs/manual/manual.mk
>  .PHONY: $(noconfig_targets)
> 
>  endif #umask / $(CURDIR) / $(O)
> +

Spurious empty line change.

> diff --git a/package/netsniff-ng/Config.in b/package/netsniff-ng/Config.in
> index 5d1407baac..9adae0510a 100644
> --- a/package/netsniff-ng/Config.in
> +++ b/package/netsniff-ng/Config.in
> @@ -27,6 +27,11 @@ config BR2_PACKAGE_NETSNIFF_NG_MAUSEZAHN
>  comment "mausezahn needs glibc or musl toolchain"
>      depends on BR2_TOOLCHAIN_USES_UCLIBC
> 
> +config BR2_PACKAGE_NETSNIFF_NG_CURVETUN
> +    bool "curvetun"
> +    default y

We usually do not use 'default y' for optional features, especially
when such a feature was previously disabled anyway.

Note that mausezahn is a special case, because it is an optional feature
that was previously always built, so it got a 'default y' to keep old
(def)config files working.

> +    select BR2_PACKAGE_LIBSODIUM
> +
>  endif
> 
>  comment "netsniff-ng needs a toolchain w/ threads, headers >= 3.0"
> diff --git a/package/netsniff-ng/netsniff-ng.mk
> b/package/netsniff-ng/netsniff-ng.mk
> index 283ecaf245..b6b03403ad 100644
> --- a/package/netsniff-ng/netsniff-ng.mk
> +++ b/package/netsniff-ng/netsniff-ng.mk
> @@ -9,11 +9,22 @@ NETSNIFF_NG_SITE = http://pub.netsniff-ng.org/netsniff-ng
>  NETSNIFF_NG_SOURCE = netsniff-ng-$(NETSNIFF_NG_VERSION).tar.xz
>  NETSNIFF_NG_LICENSE = GPL-2.0
>  NETSNIFF_NG_LICENSE_FILES = README COPYING
> +
> +NETSNIFF_NG_DEPENDENCIES = libnl libpcap libnetfilter_conntrack liburcu
> +
> +ifeq ($(BR2_PACKAGE_NETSNIFF_NG_CURVETUN),y)
> +# Prevent netsniff-ng configure script from finding a host installed nacl
> +NETSNIFF_NG_CONF_ENV = \
> +    NACL_INC_DIR=$(STAGING_DIR)/usr/include/sodium \
> +    NACL_LIB_DIR=$(STAGING_DIR)/lib \

libsodium is in $(STAGING_DIR)/usr/lib, not in .../lib but bizarrely
enough, this patch still produced a curvetune properly linked with
libsodium...

Can you check whether those options (NACL_INC_DIR and NACL_LIB_DIR) are
indeed really needed? Probably, keeping NACL_LIB=sodium might be jsut
enough...

Regards,
Yann E. MORIN.

> +    NACL_LIB=sodium
> +NETSNIFF_NG_DEPENDENCIES += libsodium
> +else
>  # Prevent netsniff-ng configure script from finding a host installed nacl
>  NETSNIFF_NG_CONF_ENV = \
>      NACL_INC_DIR=/dev/null \
>      NACL_LIB_DIR=/dev/null
> -NETSNIFF_NG_DEPENDENCIES = libnl libpcap libnetfilter_conntrack liburcu
> +endif
> 
>  ifeq ($(BR2_PACKAGE_NETSNIFF_NG_MAUSEZAHN),y)
>  NETSNIFF_NG_DEPENDENCIES += libcli libnet
> -- 
> 2.23.0
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